iRhapsody 12V DC 5‑Pin SPDT Automotive Relay Kit — 25-Pack 40A Relays for Lights & Motors

iRhapsody's 12V DC 5-pin SPDT relay kit supplies 25 rugged automotive relays rated up to 40A for reliable switching of lights, motors, and accessories in 12‑volt systems.

This bulk kit is built for workshops, installers, and DIYers who need a dependable set of standard 5‑pin relays for cars, boats, ATVs, and other 12V devices. Each relay uses a nominal 12V coil (1.8W, 80 Ω) and offers fast operate/release times with long mechanical and electrical lifespans, making it suitable for frequent switching tasks such as power trim and tilt, lighting circuits, and audio or security installations.

How does this relay handle high-current automotive loads?

The relays are specified for high switching capacity so they can control motors and heavy lighting without excessive voltage drop or heat. Contact rating is NO 40A at 14V DC with a max switching power of 560W, and contact resistance is low to keep circuit losses minimal.

• Max switching current: 40A; max switching power: 560W
• Contact resistance: ≤100 mΩ (measured at 6VDC, 1A)
• Dielectric strength: 500VAC between open contacts
• Designed for continuous automotive use and repeated cycles

What electrical specs and switching behavior should I expect?

These relays use a 12V DC coil that reliably operates within a typical automotive voltage window. They have short operate and release times and are rated for many thousands of cycles under normal conditions.

• Nominal coil voltage: 12V DC; coil power: 1.8W; resistance: 80 Ω
• Must operate: 6–8V DC; must release: 0.6–3.6V DC; max applied: 15.6V DC
• Operate time ≈ 7 ms; release time ≈ 5 ms for quick switching
• Electrical life: ~100,000 operations (at 30 ops/minute)

Are these relays durable for harsh automotive environments?

The iRhapsody relays are engineered to survive typical vibrations, shocks, and temperature ranges encountered in vehicle service. Insulation and resistance figures support stable operation across a range of conditions.

• Operating temperature: -30°C to +80°C
• Vibration resistance: 10–55Hz, 1.5mm amplitude; shock up to 10g in operation
• Insulation resistance ≥100 MΩ at 500V DC; contact-to-coil dielectric 750VAC
• Mechanical life expectancy: up to 10,000,000 cycles

What wiring layout and applications do these 5-pin relays support?

This is a standard SPDT (single pole, double throw) 5‑prong relay with the common automotive pin mapping, so it fits popular relay sockets and wiring harnesses. It's versatile for switching between normally open and normally closed outputs and is commonly used in lighting, trim/tilt motors, audio, and security circuits.

• Pin assignments: 30 = battery/line, 85 = ground, 86 = coil trigger, 87 = NO output, 87a = NC output
• Common uses: headlights, LED drive circuits, car stereos, alarm systems, trim/tilt motors
• Comes as a 25-piece pack suitable for stock and spare inventory
• Compatible with standard 5‑pin relay sockets and inline fuse protection

Who is this for? This 25× relay set is ideal for professional auto electricians, marine technicians, garage workshops, and hobbyists who want a ready supply of robust 12V SPDT relays. Choose this kit when you need consistent performance across repeated cycles, simple pin compatibility with common harnesses, and a convenient bulk supply for maintenance, retrofit, or custom wiring projects.