Omron G8b-201-01 May 2026
Examination: Omron G8B-201-01 Relay
Overview
The Omron G8B-201-01 is a compact single-pole double-throw (SPDT) signal relay commonly used in low-power switching, control panels, instrumentation, and telecom equipment. It’s valued for small size, reasonably fast switching, and dependable contact performance for signal-level loads.
Failure Modes & Troubleshooting (The "Interesting" Reality)
- Common failure: Contact pitting after switching LED headlights. Reason: LED drivers have high inrush due to input capacitors. Use the G8B-201-01 specifically (AgSnO₂) instead of AgNi types.
- Symptom: Relay clicks but no power. Check NO contact resistance (should be <100mΩ). High resistance indicates carbonized contacts from DC arc.
- Coil failure: Open coil after overvoltage (>16V). The coil is not transient-protected externally—add a flyback diode (1N4004) across the coil pins if driving from a MOSFET.
Basic Wiring Steps:
Would you like a pinout diagram, suggested PCB layout footprint, or a driver circuit example for this relay? omron g8b-201-01
Omron G8B-201-01 – High-Capacity PCB Relay
1. Product Overview The Omron G8B-201-01 is a single-pole, single-throw (SPST-NO) high-capacity power relay designed for PCB mounting. It is part of the G8B series, known for its ability to switch heavy loads in a compact package, making it suitable for automotive, industrial, and power supply applications. Basic Wiring Steps: Would you like a pinout
Physical Characteristics & Pin Configuration
The G8B-201-01 is designed for direct through-hole soldering onto a PCB. Unlike plug-in automotive relays (like the common ISO 280 relays), the G8B series is not intended for a socket; it is soldered permanently into the circuit. suggested PCB layout footprint
- Mouser Electronics (Global)
- Digi-Key Electronics (Global)
- Arrow Electronics (Bulk quantities)
- Newark / Farnell (Europe)
- RS Components (UK/Asia)
