NINGBO KEYONG JINGSHENG ELECTRICAL APPLIANCE CO., LTD. offers the KY4119 (4120) High Current Automotive PCB Relay, featuring up to 40A switching capability with 1 Form A and 1 Form C contact configurations. Available in sealed and open types, this automotive PCB relay supports both American and European terminal dimensions for broad application compatibility. Widely used in automotive control systems, automatic control equipment, and industrial applications, the KY4119 (4120) delivers reliable performance, cost efficiency, and stable high-current switching for OEM and industrial customers.
High Current Switching Performance
Designed for heavy-load electrical control applications, the relay provides stable switching performance with reduced contact resistance and improved electrical conductivity, making it suitable for automotive power systems and industrial control equipment.
Compact PCB Mount Design
The PCB mounting structure helps save installation space while simplifying assembly processes for automotive electronic modules and control systems.
Automotive Grade Reliability
Manufactured with high-quality materials and precision components, the relay offers excellent resistance to vibration, heat, and harsh operating environments commonly found in automotive applications.
Long Electrical and Mechanical Life
Advanced contact materials and optimized internal structure help extend service life and improve long-term operational stability.
Multiple Protection Options
Available in sealed and dustproof designs to support different application environments and improve protection against moisture and contaminants.
OEM & ODM Customization Support
KEYONG provides flexible customization services for global customers, including:
●Customized coil voltage
●Contact forms
●PCB terminal layouts
●Bracket installation
●Housing structure
●Logo and packaging customization
| Contact arrangment | A/C |
| Voltage drop(at 10A) | ≤200mV |
| Contact material | Silver alloy:AgSnO₂ In₂O₃、AgSnO₂、AgNi |
| Contact rating(Res.load) | 30A/40A 14VDC |
| Max switching voltage | 75VDC |
| Max switching current | Make:100A(amp,Inrush current) Break:60A(Resistive)2500VA/300W |
| Electrical endurance (Frequency:360 ops/h) | 1×10⁵ops/1×10⁴ops |
| Mechanical endurance (Frequency:18000 ops/h) | 1×10⁷ops |
|
|
Standard type | Sensitive type | |||||||
| Power consumption(W) | 1.9 | 1.6 | 1.6 | 1.2 | 1.2 | 1.2 | |||
| Nominal voltage(VDC) | 6 | 12 | 24 | 6 | 12 | 24 | |||
| Coil resistance(Ω±10%) | 19 | 90 | 360 | 30 | 120 | 480 | |||
| Pick-up voltage(Max) | 60%(Nominal voltage) | 75%(Nominal voltage) | |||||||
| Drop-out voltage(Min) | 10%(Nominal voltage) | ||||||||
| Max allowable overdrive voltage(VDC) | 150%(Nominal voltage) | ||||||||
| Insulation level | B/F | |
| Insulation resistance | 100MΩ(500VDC) | |
| Dielectric strength(Leakage current 1mA) | Dielectric strength (Between coil and contacts) | 500VAC 1/minute |
|
|
Dielectric strength (Between open contacts) | 500VAC 1/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 | 10~40Hz 1.27mm/Double amplitude 40~70Hz 49m/s² | |
|
|
70~100Hz 0.5mm/Double amplitude 100~500Hz 98m/s² | |
| Shock resistance | 98m/s² | |
| Weight | Approx 19g | |
| Construction | Sealed/Open | |
Remark:Al above data is initial value
This automotive PCB power relay is widely used in:
●Automotive Electronic Systems
●EV Charging Systems
●Battery Management Systems (BMS)
●Car Lighting Control
●Cooling Fan Systems
●Air Conditioning Systems
●Automotive Power Distribution
●Industrial Automation Equipment
●Power Supply Control Systems
●Intelligent Electrical Devices
1.What is the maximum switching current of this automotive PCB relay?
The relay supports high current switching capacities ranging from 30A to 100A depending on different models and configurations.
2.Is this relay suitable for EV systems?
Yes. The relay is widely used in EV charging systems, battery management systems, and automotive electronic control applications.
3.What coil voltages are available?
Standard coil voltages include 12VDC and 24VDC. Customized voltage options are also available upon request.
4.Can you provide samples?
Yes. Samples are available for testing and evaluation before bulk orders.
5.What protection types are available?
Both sealed and dustproof protection structures are available according to application requirements.
Looking for a reliable automotive PCB relay manufacturer and supplier in China?
Contact KEYONG Today for:
●Factory Direct Pricing
●Free Product Consultation
●OEM & ODM Support
●Fast Quotation Within 24 Hours
●Sample Testing Service
●Stable Bulk Order Supply
KEYONG is committed to providing high-quality automotive relay solutions with reliable performance, competitive pricing, and professional export service for global customers.
Address
350 Renmin North Road, Hengxi Town, Yinzhou District, Ningbo City, Zhejiang Province, China
Tel
