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The following are recommendations for automotive motor thermal protectors selected based on comprehensive performance and reliability, covering different application scenarios and budget requirements:
 2MP motor thermal protector with dual current and temperature protection |
 17am Motor Thermal Protector 17am034a5 135 Degree Normally Closed Thermostat Klixon Thermal Switch |
 Klixon 3MP Automotive Motor Thermal Protectors |
🔥 I. High-precision mainstream models
KLIXON 2MP series (Texas Instruments, USA)
Core parameters: tripping current 2A~20A (multiple gears optional), response time 4-10 seconds, action temperature 80℃~170℃ automatic reset;
Advantages: Bimetallic strip overcurrent/overtemperature dual protection, UL/VDE/CQC certified, suitable for small and medium-power motors such as windows and wipers;
Applicable scenarios: 12V vehicle system, anti-pinch window motor is preferred (compatible with anti-pinch algorithm).
KLIXON 8AM high power series
Core parameters: tripping current 3A~80A, withstand 240V AC voltage, 170℃ high temperature protection;
Advantages: Silver-plated contacts reduce arc damage, specially designed for high-current motors such as seat adjustment and electric tailgate;
Typical applications: Ideal L9 leg rest motor (need to be used with cooling fan).
⚡ II. Domestic cost-effective solution
Delixi CDP9 series
Core parameters: operating temperature 85℃~150℃ (±3℃ accuracy), rated current 30A, 12V/24V dual voltage support;
Advantages: IP67 protection level, strong shock resistance, suitable for commercial vehicle wiper motors and water pumps;
Certification: Complies with TS16949 and the new version of 2025 3C certification (code 0308).
Chint NXB-63 micro protector
Core parameters: segmented protection (85℃ warning/105℃ power off), maximum load 20A;
Advantages: small size (15mm diameter), directly integrated into the motor carbon brush end cover;
Applicable scenarios: sunroof anti-pinch system, rearview mirror adjustment motor.
🛡️ III. new energy special solution
Weian WPB active fuse
Technical highlights: millisecond power off response (BMS linkage), breaking capacity 1000V/500A;
Innovative design: pyrotechnic device trigger + copper bar forced cut-off to solve the risk of high-voltage motor blocking;
Applicable models: 800V platform electric drive system (customized mounting bracket required).
📌 Purchase Recommendation Table
| Demand scenario | Recommended model | Key considerations |
| Anti-pinch window/sunroof motor | KLIXON 2MP | Response time ≤5 seconds, anti-pinch force ≤100N |
| High-power seat motor | KLIXON 8AM | With active cooling system (avoid frequent triggering) |
| Commercial truck wiper motor | Delixi CDP9 | 24V voltage adaptation, anti-vibration design |
| High-voltage electric drive system | Weian WPB series | BMS signal compatibility, breaking capacity |
💡 Operation Tips:
Heat Optimization: It is recommended to install aluminum heat sink fins in high current scenarios to reduce the risk of false operation caused by ambient temperature;
Certification Verification: Make sure that the product has TS16949 or GB38031-2025 certification (mandatory for new energy vehicles);
Compatibility Test: The anti-pinch function motor needs to verify whether the window position can be reset normally after the protector is triggered.