4-Pin 12V 120A Continuous Duty High Current Relay Switch
4-Pin 12V 120A Continuous Duty High Current Relay Switch
4-Pin 12V 120A High Current Continuous Duty Relay Switch
Upgrade your vehicle or electrical system with this heavy-duty 4-Pin 12V 120A Continuous Duty Relay Switch. Engineered for high-power applications, this relay delivers rock-solid conductivity and reliable on/off switching for automotive, marine, and industrial setups. Made in Mainland China.
Key Features
- High Power Capacity: Handles 12V DC voltage and up to 120A of current with a 1.8W coil power and 80-ohm coil resistance — ideal for split charging and high-demand electrical applications.
- Flame-Retardant Shell: The outer casing is constructed from flame-retardant, high-temperature- and wear-resistant material, ensuring long-lasting safety and structural integrity with no risk of heat-related damage.
- Pure Copper Inner Core: A solid copper core guarantees excellent conductivity, minimal energy loss, and outstanding durability. High-quality materials and precision engineering make every switch cycle safe and dependable.
- Beginner-Friendly Installation: Simple plug-and-play setup requires no additional tools. Just follow the rated power limits to keep your system running safely and efficiently.
- Wide Compatibility: Designed for 12V systems across cars, trucks, boats, marine vessels, household appliances, and mechanical automation equipment.
Specifications
| Material | Brass, Nylon, Plastic |
| Dimensions | 7.43 × 4.5 × 4.5 cm / 2.93 × 1.77 × 1.77 in |
| Contact Switching Voltage | 12V DC |
| Rated Current | 120A |
| Coil Power | 1.8W |
| Coil Resistance | 80 Ohm |
| Pin Configuration | 4-Pin |
| Country of Origin | Made in Mainland China |
What's in the Box
- 1 × 4-Pin 12V 120A Relay Switch
Notes
- Slight color differences may exist between product images and actual item due to display settings.
- Allow minor dimension variance due to manual measurement.
- Do not exceed rated current/voltage to avoid damage.
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Frequently Asked Questions
Q: What vehicles or systems is this 12V 120A relay switch compatible with?
A: This 4-pin 12V 120A relay switch is compatible with most 12V DC electrical systems, including cars, trucks, boats, marine vessels, household appliances, and mechanical automation equipment. It is especially well-suited for split charging setups and high-current switching tasks.
Q: Does this continuous duty relay require any special tools to install?
A: No special tools are needed. The relay is designed for straightforward installation, even for beginners. Simply connect the four pins according to your wiring diagram and ensure the system stays within the 120A rated current limit to operate safely.
Q: What materials are used in this relay switch, and is it safe for long-term use?
A: The relay features a flame-retardant nylon and plastic outer shell with a brass and pure copper inner core. These materials provide excellent heat resistance, durability, and conductivity, making it safe and reliable for continuous duty operation over extended periods.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.