Скачать или смотреть How a 12V 5-Pin SPDT Relay Works | 30/40A Electrical Relay Explained

👉 Obtain the same 5-pin relay shown in this video:
Amazon: https://shorturl.at/O16j5

Official Site: https://tinyurl.com/43pprn7x
In this video, we walk you through a clear, step-by-step explanation of a 12V 5-Pin SPDT (Single Pole Double Throw) electrical relay, breaking down how it works, how each pin functions, and where it’s commonly used in automotive and 12V electrical systems.

Every key detail is shown clearly—perfect for beginners who want to understand relays, as well as DIYers working on accessory or control circuit upgrades.

What you’ll learn in this video:

What a 5-pin SPDT relay is and how it differs from a 4-pin relay

The function of each pin (85 / 86 / 30 / 87 / 87a)

How NO (Normally Open) and NC (Normally Closed) circuits work

When to use 30A vs 40A relay capacity

Common use cases: lights, fans, horns, motors, power switching, and signal control

This detailed relay walkthrough is ideal for DIYers, automotive enthusiasts, and anyone learning 12V electrical systems who wants a simple, reliable way to control higher-current devices using low-current signals.

👉 Working on a 12V wiring project?
Make sure you choose the right relay type and amperage before connecting your accessories.