Omron G8b-201-01 Access
The Omron G8B-201-01 is a specialized automotive relay primarily serving as a Turn Signal Flasher Relay for vintage and modern Honda motorcycles. This component is a critical link in a vehicle's electrical system, acting as an electrically controlled switch that regulates the blinking frequency of indicator lights. Functional Role and Importance
In automotive design, relays like the G8B-201-01 allow low-current control circuits to manage high-current loads. Specifically, this model is designed to handle the rapid switching required for turn signals, ensuring they flash at a consistent rate—typically around 85 times per minute. By isolating the high-current path of the signal bulbs from the handlebar switch, the relay prevents switch burnout and allows for the use of thinner, more manageable wiring in the control circuit. Technical Specifications
The G8B-201-01 is built to withstand the demanding environments of a motorcycle, including extreme temperatures and vibrations.
Voltage: Optimized for 12V DC systems with a tolerance range of 11V to 15V. omron g8b-201-01
Switching Load: It supports a broad range from 0.1W up to 120W, making it compatible with various bulb configurations.
Interface: Features a 3-pin (mini faston) connector layout, common in Japanese motorcycle designs.
Temperature Range: Operates reliably from -40ºC to +80ºC, ensuring functionality in both winter and summer conditions. Vehicle Compatibility and Legacy The Omron G8B-201-01 is a specialized automotive relay
This specific Omron unit is closely associated with Honda motorcycles and is often cross-referenced with Honda part number 38301-MF8-771. It is a staple component for classic models from the 1980s and 1990s, including: G8NB - Omron
Vibration resistance. Durability. 33Hz 45m/s2. Malfunction (Detecting time: 1ms) 10 to 400Hz 45m/s2. Shock resistance. Durability. OMRON Global
Q5: What is the difference between G8B-201-01 and G8B-201-01-DC12?
A: The suffix “-DC12” explicitly states the coil voltage. Often, the base part number G8B-201-01 implies DC12, but check the datasheet. Omron uses various suffixes for plating and sealing options. Q5: What is the difference between G8B-201-01 and
Warning on Substitutions:
Do not substitute a 5-pin changeover (SPDT) relay for the G8B-201-01 without checking the PCB layout. The G8B-201-01 is a 4-pin SPST-NO. Forcing a 5-pin part into a 4-pin footprint requires jumper wires and is not reliable.
Applications: Where is the Omron G8B-201-01 Used?
Because this relay can handle 20 amps continuously, it is overkill for simple interior lighting or radio memory. Instead, it is deployed in systems that demand robust power management.
Key Identifier Breakdown:
- G8B: The series indicator for high-load, automotive-grade PCB relays.
- 201: Typically denotes the coil voltage and contact arrangement. In this case, it often refers to a 12V DC coil (standard automotive voltage).
- 01: Indicates the specific contact material, terminal plating, and sealing method (often flux protection or plastic sealed).
3. Pinout and Wiring Diagram
The G8B is a PCB mount relay. Identifying the pins is critical for correct circuit design.
Standard Pin Configuration (Viewed from Top): The relay typically has 5 pins arranged for through-hole PCB mounting.
- Coil (+): Power input for the magnet.
- Coil (-): Ground for the magnet.
- Common (COM): The moving contact.
- Normally Open (NO): Connected to COM when the relay is energized.
- Normally Closed (NC): Connected to COM when the relay is OFF.
How it works:
- State OFF: Current flows between COM and NC.
- State ON (Apply 12V to Coil): The switch flips. Connection breaks between COM/NC and establishes between COM and NO.
