The HFV15-24-H4STJ-D is a high-reliability automotive power relay designed for safe, efficient, and durable switching of medium-current electrical loads in 24V vehicle systems. Built with a Form 1A (SPST normally open) contact configuration, this relay is ideal for straightforward on/off control of automotive circuits where reliability and protection are essential.
Operating with a 24VDC coil voltage, the HFV15-24-H4STJ-D is well-suited for commercial vehicles, trucks, buses, and industrial 24V electrical systems. Its coil design ensures stable actuation and consistent switching performance even under fluctuating supply conditions commonly found in automotive environments.
The relay supports a 20A switching capacity, making it suitable for controlling loads such as lighting systems, HVAC blowers, fuel pumps, auxiliary power outlets, control modules, and other medium-power automotive devices. Its robust internal construction ensures low contact resistance and stable current handling for long-term reliability.
A key feature of this model is its integrated TVS (Transient Voltage Suppression) diode, which protects the coil circuit from voltage spikes and inductive kickback during switching. This enhances system durability, improves electronic protection, and reduces the risk of damage to sensitive vehicle control electronics.
The HFV15-24-H4STJ-D is built with a durable plastic housing and mounting bracket design, allowing secure installation in automotive relay boxes and control panels. Its construction is engineered to withstand vibration, shock, and harsh environmental conditions typically encountered in automotive applications.
The relay also features quick-connect (QC) terminals, enabling fast and reliable installation while maintaining strong electrical contact integrity. This makes it suitable for both OEM production lines and aftermarket automotive upgrades.
Designed for long service life, the relay ensures consistent performance under repetitive switching cycles, maintaining electrical stability and safety throughout its operational lifespan.
Key Features
- Form 1A (SPST normally open) contact configuration
- 24VDC coil voltage
- 20A high switching capacity
- Integrated TVS diode for coil protection
- Plastic housing with mounting bracket
- Quick-connect terminal design
- Automotive-grade vibration and shock resistance
- Low contact resistance for efficient power transfer
- Suitable for 24V vehicle electrical systems
Typical Applications
- Automotive lighting systems
- HVAC and blower motor control
- Fuel pumps and auxiliary systems
- Truck and bus electrical systems
- Industrial 24V DC control circuits
- General-purpose automotive switching
The HFV15-24-H4STJ-D combines robust 20A switching performance, built-in surge protection, and durable automotive-grade construction, making it a dependable solution for engineers and technicians working on safe, efficient, and long-lasting 24V vehicle electrical systems.
What's in the box
1 x HFV15-24-H4STJ-D 24V Automotive Relay 20A SPST With TVS Diode Protection
