The High Current Micro ISO Automotive Relay from NINGBO KEYONG JINGSHENG ELECTRICAL APPLIANCE CO., LTD. (KEYONG) is a compact and high-performance switching solution designed for automotive and lamp accessory applications, with a switching capacity up to 40A. Featuring 1 Form A, 1 Form B, and 1 Form C contact configurations, it supports both PCB pin and quick-connect mounting for flexible installation in confined spaces (20.8 × 15.8 × 22.2mm). This relay operates reliably in extreme temperatures from -40°C to 125°C and offers 35A and 40A load options to meet different circuit requirements. With plastic-sealed and flux-proof designs, and full RoHS compliance, it ensures durability, safety, and stable long-term performance, making it a dependable choice for automotive lighting and electrical system procurement.
●High current switching capability designed for automotive heavy-load circuits
●Micro ISO standard compact design for easy installation and replacement
●Stable performance under high temperature environments up to 125°C
●Strong vibration and shock resistance for automotive applications
●Long electrical life with high reliability for continuous operation
●Low coil power consumption for improved energy efficiency
●Compatible with multiple automotive control systems and wiring harnesses
| Contact arrangment | A/B/C |
| Voltage drop(at 10A) | ≤200mV |
| Contact material | Silver alloy:AgSnO₂ In₂O₃、AgSnO₂、AgNi |
| Contact rating | 20A/35A 14VDC |
| Max switching voltage | 50VDC |
| Max switching current | 35A(Resistive 14VDC) |
| Min contact load | 1A 6VDC |
| Electrical endurance(Frequency:900 ops/h) | 1×10⁵ops |
| Mechanical endurance(Frequency:18000 ops/h) | 1×10'ops |
| Power consumption(W) | 1.5W | 1.7W | 1.5W | 1.7W | 1.8W | 2.0W |
| Nominal voltage(VDC) | 12 | 12 | 24 | 24 | 24 | 24 |
| Coil resistance(Q±10%) | 96 | 96 | 384 | 384 | 320 | 320 |
| Parallel resistance(Ω) |
|
680 |
|
2700 |
|
2700 |
| Pick-up voltage(Max) | 75%(Nominal voltage) | |||||
| Drop-out voltage(Min) | 10%(Nominal voltage) | |||||
| Max allowable overdrive voltage(VDC) | 150%(Nominal voltage) | |||||
| Insulation level | Class B/Class F | |
| Insulation resistance | 100MΩ(500VDC) | |
| Dielectric strength(Leakage current 1mA) | Dielectric strength(Between coil and contacts) | 500VAC minute |
| Dielectric strength(Between open contacts) | 500VAC 1分钟/minute | |
| Operate time(at nominal voltage) | ≤10ms | |
| Release time(without diode)(at nominal voltage) | ≤10ms | |
| Humidity | 5%-85%RH | |
| Ambient temperature | -40℃~+125℃ | |
| Vibration resistance | 10Hz～60Hz 0.35mm Double amplitude | |
| 60Hz~500Hz 49m/s² | ||
| Shock resistance | 196m/s² | |
| Weight | Approx 169 | |
| Construction | Dustproof type Sealed type | |
The KEYONG High Current Micro ISO Automotive Relay is widely used in various industries requiring stable and reliable electrical switching:
●Automotive lighting systems (headlights, fog lights, signal lights)
●Engine control units (ECU) and fuel pump systems
●HVAC and air conditioning systems in vehicles
●Electric and hybrid vehicle control systems
●Heavy-duty trucks, buses, and commercial vehicles
●Industrial automation control systems
●Renewable energy charging and storage systems
●Security and surveillance equipment
Its versatility makes it a preferred choice for global OEM manufacturers and system integrators looking for a reliable automotive relay supplier from China.
Every KEYONG High Current Micro ISO Automotive Relay is tested under strict quality standards to ensure stable performance and safety compliance.
Certifications include:
●UL Certification
●TUV Certification
●CQC Certification
●CE Certification
●RoHS Compliance
CE
CQC
RoHS
TUV
UL
This ensures that every product delivered from KEYONG factory meets international safety and reliability requirements.
KEYONG operates multiple automated production systems, including:
●Ultrasonic cleaning equipment
●Precision winding and soldering machines
●Intelligent assembly lines
●Industrial vision inspection systems
●Electrical performance testing systems
●Automatic parameter adjustment and calibration equipment
This advanced manufacturing setup ensures consistent product quality and high production efficiency, making KEYONG a reliable relay factory in China for global buyers.
1. What makes a High Current Micro ISO Automotive Relay different from standard relays?
It is designed specifically for higher load capacity while maintaining compact Micro ISO dimensions, making it suitable for modern automotive electrical systems with limited installation space.
2. Can this relay operate in high-temperature environments?
Yes. The relay is designed to operate reliably from -40°C to +125°C, making it suitable for engine compartments and harsh automotive environments.
3. Is KEYONG a manufacturer or trading company?
KEYONG is a direct manufacturer and factory in China, with full in-house production, R&D, and testing capabilities.
4. Do you support OEM or customized relay solutions?
Yes. KEYONG provides OEM/ODM customization including coil voltage, contact configuration, housing design, and terminal types.
5. What industries commonly use this relay?
It is widely used in automotive electronics, EV systems, industrial control, HVAC systems, and renewable energy applications.
Ningbo Keyong Jingsheng Electrical Appliance Co., Ltd. (KEYONG RELAY) is a professional relay manufacturer in China with over a decade of production experience. The company operates a 12,000㎡ modern factory equipped with automated production lines, precision testing systems, and intelligent assembly equipment.
Key advantages include:
●Large-scale production capacity exceeding 80 million relays annually
●Full in-house manufacturing from components to final assembly
●Strict quality control under ISO9001 system
●Strong R&D capability for customized relay solutions
●Stable supply chain for global OEM and bulk orders
KEYONG has become a long-term partner for clients in automotive electronics, renewable energy systems, household appliances, communication equipment, and industrial automation industries.
Address
350 Renmin North Road, Hengxi Town, Yinzhou District, Ningbo City, Zhejiang Province, China
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