NINGBO KEYONG JINGSHENG ELECTRICAL APPLIANCE CO., LTD., a professional China Manufacturer and Supplier under KEYONG, presents the KLM-V6(4133) Micro ISO Automotive Relay, a compact 40A switching solution for automotive lighting and accessory systems. With a mini size of 20.8 × 15.8 × 22.2mm, it fits tight installation spaces and supports 1 Form A/B/C contacts with PC pin or quick-connect mounting. Designed for -40°C to 125°C operation, it offers stable performance in harsh environments, with optional sealed and flux-proof structures for added durability. Available in 35A and 40A ratings, each relay is RoHS compliant and strictly tested for quality, providing reliable performance, flexible sampling, and competitive bulk supply for global automotive applications.
High Current Capability: Supports 30A–60A switching for heavy-duty applications
Fuse-Integrated Design: Enhances circuit safety and overload protection
Dustproof Structure: Improves durability in harsh working environments
Flexible Contact Options: Compatible with standard and heavy-duty configurations
Multiple Installation Methods: Quick connect and PCB mounting supported
Stable Electromagnetic Performance: Ensures reliable switching under vibration and load variation
Long Service Life: Optimized contact materials reduce wear and arcing
The KEYONG KLD (V4) relay is designed with industrial-grade materials and precision assembly processes. Its contact system ensures low resistance and high conductivity, reducing energy loss during operation. The reinforced housing structure improves resistance to heat, dust, and mechanical stress.
| 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) | 1×10⁶ops |
| Mechanical endurance(Frequency:18000 ops/h) | 1×10⁷ops |
| 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) | |||||
| nsulation 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 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 Fuse Design Automotive Relay is widely used in:
Automotive electronic control systems
New energy charging and storage systems
Industrial automation equipment
Security and surveillance systems
Heavy-duty power distribution circuits
HVAC and household appliance control modules
Its versatility makes it a preferred choice for engineers and procurement teams seeking stable relay performance from a reliable China Manufacturer and Supplier KEYONG.
1. Is the KLD (V4) relay suitable for high-load automotive systems?
Yes. It is specifically designed for 30A–60A high-current applications, making it suitable for engine control, power distribution, and energy systems.
2. Can it be used in harsh environments?
Yes. The dustproof structure and industrial-grade materials ensure stable operation in vibration, heat, and dust-prone environments.
3. Does KEYONG support OEM customization?
Yes. As a professional China Manufacturer and Supplier, KEYONG provides customization in coil voltage, contact configuration, housing design, and packaging.
4. What quality certifications does the product meet?
The relay is manufactured under ISO9001 systems and certified by UL, TUV, CQC, CE, and RoHS standards.
5. What makes KEYONG different from other suppliers?
KEYONG combines automated production, strict quality control, and engineering expertise, ensuring consistent performance and long-term supply stability as a reliable Factory in China.
KEYONG is a professional Factory and Manufacturer in China specializing in electromagnetic relays with full in-house production capabilities. With over a decade of experience, advanced automated production lines, and strict quality inspection systems, we ensure every relay meets international performance and safety requirements.
Factory area: 12,000 m² modern production base
Annual capacity: Over 80 million relays
Global export coverage: North America, Europe, Middle East, Southeast Asia
Strong OEM/ODM customization support
KEYONG focuses on delivering stable supply, engineering reliability, and long-term cooperation for global partners.
Address
350 Renmin North Road, Hengxi Town, Yinzhou District, Ningbo City, Zhejiang Province, China
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