PTC Heaters for Electric Car: Your Complete Guide

Overview: The Future of EV Thermal Management

As electric vehicles (EVs) evolve, efficient thermal management becomes essential to ensure passenger comfort, extend battery life, and enhance driving range.
KLC Corporation designs and manufactures PTC heaters and high-voltage PTC (Positive Temperature Coefficient) heaters engineered specifically for electric vehicle heating systems.Our PTC heaters provide fast heating, self-regulating temperature control, high safety, and long service life, making them the ideal solution for next-generation EVs worldwide.

KLC’s PTC and high-voltage PTC heaters deliver fast, safe, and energy-efficient heating for electric, hybrid, and fuel-cell vehicles. As modern engines produce less “waste” heat, our electric auxiliary heaters supplement traditional systems, reducing cabin warm-up time and maintaining optimal temperatures. Designed with automatic power adjustment and self-regulating temperature control, KLC PTC heaters ensure reliable performance across all driving conditions, supporting next-generation EV thermal management worldwide.

What Is a PTC Heater for Evs?

A PTC heater is an advanced electric-heating unit designed for high-efficiency thermal control in modern vehicles. Unlike conventional resistive heaters, a PTC heater adjusts its heat output in response to system conditions, providing stable performance without a separate thermostat.

For EVs, where engine “waste” heat is minimal, PTC heaters quickly warm cabins, assist in battery temperature regulation, and support auxiliary heating systems, emphasizing fast response, energy efficiency, and seamless integration into vehicle thermal-management architectures.

 

Why Choose KLC PTC Heaters?

Expertise (E):

• Over 40 years of heating technology experience.
• In-house design: 3D modeling, CFD simulations, thermal testing, and lifecycle validation.

Authoritativeness (A):

• Automotive-grade quality with IATF 16949 certification.
• UL, CSA, and VDE approved.
• Wide voltage range: 12V–999V DC/AC; power up to 3 kW.

Trustworthiness (T):

• Made in Taiwan under ISO-certified production.
• Verified performance: e.g., 2 kW PTC heater warms cabin from −17°C to 12°C in 30 minutes.

Product Highlights:

Why PTC Heaters for Electric Cars?

• Self-Regulation: One of the significant advantages of PTC heaters is their self-regulating nature. As the material heats up, its resistance increases, which in turn reduces the current flow and stabilizes the temperature.
• Safety: Safeguard your PTC heaters and equipment with our built-in safety fuses, enhancing system reliability.
• Efficiency: PTC heaters can quickly reach desired temperatures, providing rapid cabin heating in cold conditions.
• Compactness: PTC heaters are often compact, making them suitable for the limited space available in vehicles.
• Robustness: Our PTC heaters are designed to withstand external electric shocks, adding an extra layer of safety.

Key Applications

• Cabin Heating: Rapid, comfortable warmth in cold climates.
• Battery Preheating: Maintains battery performance in low temperatures.
• Defogging/Defrosting: Integrates with HVAC for clear windshields and mirrors.
• Seat & Steering Heating: Compact modules for passenger comfort.

 Engineer’s Selection Guide

• Voltage: Match system voltage (typically 200–800V DC).
• Power: Cabin heating: 1.5–3 kW; battery heating: 3–8 kW.
• Space & Airflow: Ensure mounting clearance and heat dissipation.
• Environmental Protection: Choose IP68 for outdoor or marine use.
• Integration: Supports connectors, fuses, fans, and controllers.

Testing & Validation

KLC PTC heaters undergo rigorous performance and reliability testing, including:

Airflow and heat distribution analysis to ensure even heating in cabins and battery compartments.
Lifecycle testing to verify long-term durability under repeated use.
Vibration and humidity resistance tests to confirm stability in real-world EV conditions.
Thermal safety checks to ensure heaters operate efficiently without hotspots or overloading.

This ensures every KLC heater delivers consistent, safe, and efficient thermal performance in all driving scenarios.

Why KLC?

1. Made in Taiwan – precision manufacturing and stable global supply.
2. Full R&D Capability – design, simulation, prototyping, validation.
3. Wide Power Options – adaptable to EV and commercial platforms.
4. Safety & Compliance – built-in fuse, auto-temperature control, UL/CSA/VDE.
5. Global Support – consultation, 3D STEP files, and sample delivery.

Optimize your EV heating system today.
Contact KLC for technical consultation, 3D STEP files, or sample requests.
👉 Contact Us

 

Authored by: KLC Engineering Team • Last updated: 2025-10-29
Internal links: PTC Air Heaters (STW Series) • Flexible Heaters

 

Complete Your Project with PTC Heater Accessories

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Enhance your project’s efficiency with our selection of optional PTC heater accessories, available for purchase:

• High-Temperature Mounting Frames: Simplify installation and ensure the longevity of your PTC heaters with our high-temperature mounting frames, offering stability and resilience.
• Thermostats: Fine-tune temperature regulation and control with our thermostats, optimizing the performance of your PTC heaters.
• Safety Fuses (Built-in): Safeguard your PTC heaters and equipment with our compatible safety fuses, enhancing system reliability.
• Fans: Enhance heat distribution and maintain optimal operating temperatures with our fans, ensuring consistent performance.
• Time-Temperature Controllers: Gain precise control over heating schedules and temperature settings with our time-temperature controllers, ensuring efficient operation.
• Terminal Wire Sets: Streamline connections and wiring with our terminal wire sets, simplifying installation and enhancing reliability.

High Voltage PTC Heater for Evs – 3D Model

👉 Hover over the product to preview the 3D model.

Contact us for 3D simulation or STEP file requirements!

SPECIAL | DC Models (Evs Use)
DC type PTC Heaters is most suitable for use in electric car heaters or for constant battery discharge

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Voltage	Power	Dimension (mm) W	Dimension (mm) L	Dimension (mm) T	Model	Available Mounting Frames
DC 500V (450V~520V)	300W ~ 1300W	90	93	26	MH(W)-5030S-93S ~ MH(W)-5130S-93D(S)	MHF-93, MHF-90
DC 500V (450V~520V)	200W ~ 700W	65	70	26	MSH(W)-5020B-70S ~ MSH(W)-5070B-70D(S)	MSHF-70,MSHF,MHF-90
DC 500V (450V~520V)	100W ~ 500W	65	70	26	SH(W)-5010M-70S ~ SH(W)-5050S-70D(S)	MSHF-70,MSHF,MHF-90
DC 500V (450V~520V)	100W ~ 400W	50	70	26	FH(W)-5010M-70S ~ FH(W)-5050M-70D(S)	MSHF-70,MSHF,MHF-90
DC 500V (450V~520V)	100W ~ 400W	45	70	26	TH(W)-5010N-70S ~ TH(W)-5040N-70D(S)	MHF-90
DC 500V (450V~520V)	100W ~ 300W	30	93	26	OH(W)-5010M-93S ~ OH(W)-5030M-93D(S)	MHF-90
DC 400V (360V~480V)	300W ~ 1300W	90	93	26	MH(W)-4030S-93S ~ MH(W)-4130S-93D(S)	MHF-93, MHF-90
DC 400V (360V~480V)	200W ~ 700W	65	70	26	MSH(W)-4020B-70S ~ MSH(W)-4070B-70D(S)	MSHF-70,MSHF,MHF-90
DC 400V (360V~480V)	100W ~ 500W	65	70	26	SH(W)-4010M-70S ~ SH(W)-4050S-70D(S)	MSHF-70,MSHF,MHF-90
DC 400V (360V~480V)	100W ~ 400W	50	70	26	FH(W)-4010M-70S ~ FH(W)-4050M-70D(S)	MSHF-70,MSHF,MHF-90
DC 400V (360V~480V)	100W ~ 400W	45	70	26	TH(W)-4010N-70S ~ TH(W)-4040N-70D(S)	MHF-90
DC 400V (360V~480V)	100W ~ 300W	30	93	26	OH(W)-4010M-93S ~ OH(W)-4030M-93D(S)	MHF-90
DC 300V (280V~360V)	300W ~ 1300W	90	93	26	MH(W)-3030S-93S ~ MH(W)-3130S-93D(S)	MHF-93, MHF-90
DC 300V (280V~360V)	200W ~ 700W	65	70	26	MSH(W)-3020B-70S ~ MSH(W)-3070B-70D(S)	MSHF-70,MSHF,MHF-90
DC 300V (280V~360V)	100W ~ 500W	65	70	26	SH(W)-3010M-70S ~ SH(W)-3050S-70D(S)	MSHF-70,MSHF,MHF-90
DC 300V (280V~360V)	100W ~ 400W	50	70	26	FH(W)-3010M-70S ~ FH(W)-3050M-70D(S)	MSHF-70,MSHF,MHF-90
DC 300V (280V~360V)	100W ~ 400W	45	70	26	TH(W)-3010N-70S ~ TH(W)-3040N-70D(S)	MHF-90
DC 300V (280V~360V)	100W ~ 300W	30	93	26	OH(W)-3010M-93S ~ OH(W)-3030M-93D(S)	MHF-90
DC 220V (180V~280V)	300W ~ 1300W	90	93	26	MH(W)-2030S-93S ~ MH(W)-2130S-93D(S)	MHF-93, MHF-90
DC 220V (180V~280V)	200W ~ 700W	65	70	26	MSH(W)-2020B-70S ~ MSH(W)-2070B-70D(S)	MSHF-70,MSHF,MHF-90
DC 220V (180V~280V)	100W ~ 500W	65	70	26	SH(W)-2010M-70S ~ SH(W)-2050S-70D(S)	MSHF-70,MSHF,MHF-90
DC 220V (180V~280V)	100W ~ 400W	50	70	26	FH(W)-2010M-70S ~ FH(W)-2050M-70D(S)	MSHF-70,MSHF,MHF-90
DC 220V (180V~280V)	100W ~ 400W	45	70	26	TH(W)-2010N-70S ~ TH(W)-2040N-70D(S)	MHF-90
DC 220V (180V~280V)	100W ~ 300W	30	93	26	OH(W)-2010M-93S ~ OH(W)-2030M-93D(S)	MHF-90
DC 110V (90V~130V)	300W ~ 1300W	90	93	26	MH(W)-1030S-93S ~ MH(W)-1130S-93D(S)	MHF-93, MHF-90
DC 110V (90V~130V)	200W ~ 700W	65	70	26	MSH(W)-1020B-70S ~ MSH(W)-1070B-70D(S)	MSHF-70,MSHF,MHF-90
DC 110V (90V~130V)	100W ~ 500W	65	70	26	SH(W)-1010M-70S ~ SH(W)-1050S-70D(S)	MSHF-70,MSHF,MHF-90
DC 110V (90V~130V)	100W ~ 400W	50	70	26	FH(W)-1010M-70S ~ FH(W)-1050M-70D(S)	MSHF-70,MSHF,MHF-90
DC 110V (90V~130V)	100W ~ 400W	45	70	26	TH(W)-1010N-70S ~ TH(W)-1040N-70D(S)	MHF-90
DC 110V (90V~130V)	100W ~ 300W	30	93	26	OH(W)-1010M-93S ~ OH(W)-1030M-93D(S)	MHF-90
DC 72V (60V~90V)	300W ~ 1200W	90	93	26	MH(W)-07030S-93S ~ MH(W)-07120S-93D(S)	MHF-93, MHF-90
DC 72V (60V~90V)	200W ~ 700W	65	70	26	MSH(W)-07020B-70S ~ MSH(W)-07070B-70D(S)	MSHF-70,MSHF,MHF-90
DC 72V (60V~90V)	100W ~ 500W	65	70	26	SH(W)-07010M-70S ~ SH(W)-07050S-70D(S)	MSHF-70,MSHF,MHF-90
DC 72V (60V~90V)	100W ~ 400W	50	70	26	FH(W)-07010M-70S ~ FH(W)-07050M-70D(S)	MSHF-70,MSHF,MHF-90
DC 72V (60V~90V)	100W ~ 400W	45	70	26	TH(W)-07010N-70S ~ TH(W)-07040N-70D(S)	MHF-90
DC 72V (60V~90V)	100W ~ 300W	30	93	26	OH(W)-07010M-93S ~ OH(W)-07030M-93D(S)	MHF-90
DC 48V (36V~60V)	200W ~ 1200W	90	93	26	MH(W)-04020S-93S ~ MH(W)-04120S-93D(S)	MHF-93, MHF-90
DC 48V (36V~60V)	200W ~ 700W	65	70	26	MSH(W)-04020B-70S ~ MSH(W)-04070B-70D(S)	MSHF-70,MSHF,MHF-90
DC 48V (36V~60V)	100W ~ 500W	65	70	26	SH(W)-04020M-70S ~ SH(W)-04050S-70D(S)	MSHF-70,MSHF,MHF-90
DC 48V (36V~60V)	100W ~ 400W	50	70	26	FH(W)-04020M-70S ~ FH(W)-04050M-70D(S)	MSHF-70,MSHF,MHF-90
DC 48V (36V~60V)	100W ~ 400W	45	70	26	TH(W)-04020N-70S ~ TH(W)-04040N-70D(S)	MHF-90
DC 48V (36V~60V)	100W ~ 300W	30	93	26	OH(W)-04020M-93S ~ OH(W)-04030M-93D(S)	MHF-90
DC 24V (20V~36V)	100W ~ 750W	90	93	26	MH(W)-02010S-93S~ MH(W)-02075S-93D(S)	MHF-93, MHF-90
DC 24V (20V~36V)	100W ~ 600W	65	70	26	MSH(W)-02010B-70S ~ MSH(W)-02060B-70D(S)	MSHF-70,MSHF,MHF-90
DC 24V (20V~36V)	100W ~ 400W	65	70	26	SH(W)-02010M-70S ~ SH(W)-02040S-70D(S)	MSHF-70,MSHF,MHF-90
DC 24V (20V~36V)	100W ~ 400W	50	70	26	FH(W)-02010M-70S ~ FH(W)-02040M-70D(S)	MSHF-70,MSHF,MHF-90
DC 24V (20V~36V)	100W ~ 400W	45	70	26	TH(W)-02010N-70S ~ TH(W)-02040N-70D(S)	MHF-90
DC 24V (20V~36V)	100W ~ 300W	30	93	26	OH(W)-02010M-93S ~ OH(W)-02030M-93D(S)	MHF-90
DC 12V (12~18V)	100W ~ 450W	90	93	26	MH(W)-01010S-93D ~ MH(W)-01045S-93D(S)	MHF-93, MHF-90
DC 12V (12~18V)	100W ~ 450W	65	70	26	MSH(W)-01010B-70D ~ MSH(W)-01045B-70D(S)	MSHF-70,MSHF,MHF-90
DC 12V (12~18V)	100W ~ 300W	65	70	26	SH(W)-01010M-70D ~ SH(W)-01030S-70D(S)	MSHF-70,MSHF,MHF-90
DC 12V (12~18V)	100W ~ 300W	45	70	26	TH(W)-01010N-70D ~ TH(W)-01030N-70D(S)	MHF-90
DC 12V (12~18V)	100W ~ 150W	30	93	26	OH(W)-01010M-93D ~ OH(W)-01015M-93D(S)	MHF-90

Voltage Ranges and Suitable KLC PTC Heater Suggestions

Vehicle Type	Typical Voltage Range	PTC Heater Application	Power Requirement
Electric Car	200–800 VDC (commonly 400V or 800V)	Cabin heating, defogging, battery thermal management (via air)	1.5–3 kW
Electric Bus	350–800 VDC (commonly 600V for buses)	Cabin heating, driver seat heating, large-area defogging	3–6 kW
Electric Truck	400–1000 VDC (commonly 600–800V)	Cabin heating, control box air heating, battery airflow warming	3–8 kW

New! STW High Voltage PTC Heater for EVs Use!

 

Voltage	Power	Dimension (mm)			Model	Mounting Frames
		W	L	T
(450V~520V) (500V~999V)	Max. 9999W	Min. 40±1.0	49	20±0.5	STW	housings/frames are customized per customers’ designs.
	(depends on size and design)	Max.999	337.5	25±0.5	STW

STW Specifications

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Item	W	L	T	Model	Maximum Power @Air Speed 6.4m/s
1	40	49	20±0.5	STW-X040202N1Z(P)XX	≦140W
2	40	73	20±0.5	STW-X060203N1Z(P)XX	≦210W
3	40	96	20±0.5	STW-X080204N1Z(P)XX	≦245W
4	40	120	20±0.5	STW-X100205N1Z(P)XX	≦315W
5	40	144	20±0.5	STW-X120206N1Z(P)XX	≦385W
6	40	168	20±0.5	STW-X140207N1Z(P)XX	≦455W
7	40	192	20±0.5	STW-X160208N1Z(P)XX	≦525W
8	40	216	20±0.5	STW-X180209N1Z(P)XX	≦595W
9	40	240	20±0.5	STW-X200210N1Z(P)XX	≦665W
10	40	360	20±0.5	STW-X300215N1Z(P)XX	≦980W
11	55	49	20±0.5	STW-X060302N1Z(P)XX	≦210W
12	55	73	20±0.5	STW-X090303N1Z(P)XX	≦315W
13	55	96	20±0.5	STW-X120304N1Z(P)XX	≦368W
14	55	120	20±0.5	STW-X150305N1Z(P)XX	≦473W
15	55	144	20±0.5	STW-X180306N1Z(P)XX	≦578W
16	55	168	20±0.5	STW-X210307N1Z(P)XX	≦683W
17	55	192	20±0.5	STW-X240308N1Z(P)XX	≦788W
18	55	216	20±0.5	STW-X270309N1Z(P)XX	≦893W
19	55	240	20±0.5	STW-X300310N1Z(P)XX	≦998W
20	55	360	20±0.5	STW-X450315N1Z(P)XX	≦1470W
21	70	49	20±0.5	STW-X080402N1Z(P)XX	≦280W
22	70	73	20±0.5	STW-X120403N1Z(P)XX	≦420W
23	70	96	20±0.5	STW-X160404N1Z(P)XX	≦490W
24	70	120	20±0.5	STW-X200405N1Z(P)XX	≦630W
25	70	144	20±0.5	STW-X240406N1Z(P)XX	≦770W
26	70	168	20±0.5	STW-X280407N1Z(P)XX	≦910W
27	70	192	20±0.5	STW-X320408N1Z(P)XX	≦1050W
28	70	216	20±0.5	STW-X360409N1Z(P)XX	≦1190W
29	70	240	20±0.5	STW-X400410N1Z(P)XX	≦1330W
30	70	360	20±0.5	STW-X600415N1Z(P)XX	≦1960W
31	85	49	20±0.5	STW-X100502N1Z(P)XX	≦350W
32	85	73	20±0.5	STW-X150503N1Z(P)XX	≦525W
33	85	96	20±0.5	STW-X200504N1Z(P)XX	≦613W
34	85	120	20±0.5	STW-X250505N1Z(P)XX	≦788W
35	85	144	20±0.5	STW-X300506N1Z(P)XX	≦963W
36	85	168	20±0.5	STW-X350507N1Z(P)XX	≦1138W
37	85	192	20±0.5	STW-X400508N1Z(P)XX	≦1313W
38	85	216	20±0.5	STW-X450509N1Z(P)XX	≦1488W
39	85	240	20±0.5	STW-X500510N1Z(P)XX	≦1663W
40	85	360	20±0.5	STW-X750515N1Z(P)XX	≦2450W
41	100	49	20±0.5	STW-X120602N1Z(P)XX	≦420W
42	100	73	20±0.5	STW-X180603N1Z(P)XX	≦630W
43	100	96	20±0.5	STW-X240604N1Z(P)XX	≦735W
44	100	120	20±0.5	STW-X300605N1Z(P)XX	≦945W
45	100	144	20±0.5	STW-X360606N1Z(P)XX	≦1155W
46	100	168	20±0.5	STW-X420607N1Z(P)XX	≦1365W
47	100	192	20±0.5	STW-X480608N1Z(P)XX	≦1575W
48	100	216	20±0.5	STW-X540609N1Z(P)XX	≦1785W
49	100	240	20±0.5	STW-X600610N1Z(P)XX	≦1995W
50	100	360	20±0.5	STW-X900615N1Z(P)XX	≦2940W

• All models with current (A) > 15A will have 6 terminals.
• Please refer to individual PTC air heater models for more detailed specifications and Model numbering conventions. (Links available in the section below)
• Low voltage PTC air heaters will have higher current, hence are not recommended to use in conjunction with high power(W) specifications.
• The PTC air heaters designed for automobiles are specially designed with stronger endurance and higher safety standards.
• High-Voltage PTC Air Heaters (~999V) are now available to support your complete heating solutions, especially for all kinds of electric vehicles. For more information, check out the STW type.

Application Scenarios

• Cabin Heating: Provides a uniform and comfortable interior environment.
• Battery Heating: Protects battery performance, extends lifespan, and ensures stable operation in cold conditions.
• Seat Heating: Heats seats quickly to enhance passenger comfort.

 

Cabin Temperature Test with PTC Air Heater

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Voltage: 72V
PTC Length: 128mmL
Ambient Temperature: -18℃

PTC Model	Power(W)	Average Power Consumption (W)	Fin Pitch (mm)	Location	Time(min)
					Start	10min	20min	30min
MH TYPE	2000W	1650W	2.6mm	Vent 1	-12℃	19℃	25℃	29℃
				Face 1	-12℃	8℃	14℃	17℃
				Cabin 1	-15℃	0℃	4℃	8℃
MH TYPE	2500W	2200W	1.2mm	Vent 2	-15℃	26℃	33℃	38℃
				Face 2	-13℃	10℃	18℃	23℃
				Cabin 2	-17℃	1℃	7℃	12℃
MH TYPE 2000W VS 2500W 2.6pitch VS 1.2pitch				Vent	-3℃	7℃	8℃	9℃
				Face	-1℃	2℃	4℃	6℃
				Cabin	-2℃	1℃	3℃	4℃

Other Related Information

 

Click on the following images for more detailed specifications:

Available PTC Models
MH Type	MSH Type	SH Type	OH Type
Available Frames (Recommended Accessories)
MHF-93	MSHF	MSHF-70	MHF-90

 

 

 

PTC Air Heater Models
Models	Dimension (mm)	Tube No.	Fin Width (mm)	Fin Pitch (mm)	Standard	Wired
MH	26mm x 90mm x L L(mm) : 70, 93, 106, 128, 150, 185, 202, 225, 268, 314, 358, 403, 446, 492	2 or 3	90	1.2 2.0 2.6
MSH	26mm x 65mm x L L(mm) : 70, 93, 106, 128, 150, 185, 202, 225, 268, 314, 358, 403, 446, 492	3	65	1.68 2.6
SH	26mm x 65mm x L L(mm) : 70, 93, 106, 128, 150, 185, 202, 225, 268, 314, 358, 403, 446, 492	2	65	1.68
TH	26mm x 45mm x L L(mm) : 70, 93, 106, 128, 150, 185, 202, 225, 268, 314, 358, 403, 446, 492	2	45	2.0
OH	26mm x 30mm x L L(mm) : 30, 50, 70, 93, 106, 128, 150, 185, 202, 225, 268, 314, 358, 403, 446, 492	1	30	1.68
SS	22 x 22.3 x 15mm ~ 361 x 267.6 x 15mm
New STW	10x 10x 10mm ~999 x 337.5 x 25mm
New! MTH	26mm x 50mm x L L(mm) : 70, 93, 106, 128, 150, 185, 202, 225, 268, 314, 358, 403, 446, 492	3	50	1.68		Wired type is also available.

Request a Quote

 

Frequently Asked Questions (FAQs):

What is the difference between PTC Heaters and traditional resistive heaters?

• Traditional car heaters rely on engine heat, while our PTC heater is specifically designed for the unique needs of electric cars, ensuring efficient heating without an engine’s excess heat.

Can PTC Heaters be used for battery heating?

• Yes, choose the appropriate power and size according to battery type to protect battery life.

How to select a PTC Heater?

• Select the suitable model based on voltage, power requirements, installation space, and application scenarios.

How long is the lifespan of this PTC heater?

• Designed for longevity, our heaters typically last for the entire lifespan of your electric car with proper maintenance.

Is it difficult to integrate the PTC heater into my electric car’s HVAC system?

• Our heaters are designed for seamless integration into electric car HVAC systems. We also provide guidance for smooth installation.

What are the safety features of PTC heaters?

• They self-regulate to prevent overheating, reducing risk of thermal runaway and fire hazards.

How do PTC coolant heaters differ from PTC air heaters? 

• Coolant heaters heat vehicle coolant for battery thermal management, while air heaters directly warm cabin air for passenger comfort.

What makes PTC heaters energy efficient and suitable for EVs?

• Their self-regulating property ensures automatic power adjustment based on ambient temperature and fan speed, maximizing heat output with minimal energy use.

Design your EV thermal management system with our engineer team. Request a Technical Consultation