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Last updated: August 1, 2025

8‑Pin Timer Relay Wiring Diagram & Connection Guide

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Components List

8- Pin Relay

8- Pin Relay

Electromechanical relay with 8 terminals

Single phase Light

Well Light Holder

Recessed light holder typically used in ceilings/walls

Single phase Light

Single Phase LED Light

Energy-efficient LED light for single-phase supply

10A SP MCB

10A SP MCB

Single Pole Miniature Circuit Breaker, 10 Amp

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8 Pin timer Relay wiring

Learn the pin configuration and wiring method for an 8‑pin timer relay to control loads with delay. Includes coil connections, NO/NC contacts, and timing logic.

8 pin timer relay wiring

Learn the pin configuration and wiring method for an 8‑pin timer relay to control loads with a delay. Includes coil connections, NO/NC contacts, and timing logic.

Wiring Formula Summary:

Relay Coil Voltage: V = IR (Use Ohm’s Law to check relay current requirement)
Delay Function: Depends on timer module — ON Delay or OFF Delay logic.

  • Pin 2 & 7: Coil connections
  • Pin 1: COM 1 → Pin 3 NO, Pin 4 NC
  • Pin 8: COM 2 → Pin 6 NO, Pin 5 NC

timer relay wiring diagram

An 8‑pin timer relay is used to control electrical loads with a preset delay using a DPDT contact arrangement. It provides both normally open and normally closed outputs across two separate channels. Understanding its pin configuration helps ensure safe and efficient circuit wiring for motors, lamps, and automation systems.

8 pin timer connection

PinFunctionTypeNotes
2, 7CoilPower InputApply voltage to activate timer
1COM 1ContactSwitches between NC (4) & NO (3)
8COM 2ContactSwitches between NC (5) & NO (6)

Frequently Asked Questions - 8 Pin timer Relay wiring:

What is an 8‑pin timer relay?

A timer relay with coil, two common contacts each with NC and NO terminals.

Which pins are for the coil?

Pins 2 and 7 are used for the coil (L and N supply) on most models.

How are relay contacts arranged?

Pins 1 & 8 are COM; 1 NC‑4/NO‑3; 8 NC‑5/NO‑6 contacts.

Which pins are NO and NC?

Pin 3 & 6 are NO; pin 4 & 5 are NC relays.

Can the timer drive motors?

Yes, in auto ON/OFF circuits for motors using appropriate rating.

Is this a DPDT timer?

Yes, two separate poles each with NC/NO outputs.

What voltage is coil rated?

Common options: 12 VDC, 24 VDC, 110 VAC, or 220 VAC depending on model.

Can I wire it without a diagram?

It’s risky; pin numbering and logic vary—always follow manufacturer pinout.

Do I need MCB protection?

Yes—use a SP or DP MCB/RCCB rated for coil and load currents.

How do I use it for delay ON/OFF?

Apply coil voltage to start delay, contacts change after set duration.

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Md. Jony Islam is a highly skilled professional with expertise in electronics, electrical, mechanical, and civil engineering, as well as finance. Specializing intransformer service and maintenance for 33/11kV substations, he ensures reliable and efficient electrical systems. His mechanical engineering skills drive innovative designs, while his financial acumen supports effective project budgeting. With a strong foundation in civil engineering, he contributes to robust infrastructure development. Md. Jony Islam's multidisciplinary approach ensures efficiency, quality, and reliability across all projects.