Item specifics
Description
G7SA-3A1B Product Overview
The G7SA-3A1B is a compact forcibly guided safety relay from Omron's G7SA series, designed for safety control systems in industrial machinery. The G7SA-3A1B features a 4-pole contact configuration (3a1b: 3 NO contacts + 1 NC contact), has a contact rating of 6A and supports coil voltages including DC12V, 18V, 21V, 24V, 48V, and 110V. The G7SA-3A1B utilizes a forcibly guided contact mechanism (certified to EN/IEC 61810-3 VDE) that ensures NO and NC contact groups switch simultaneously when the coil is de-energized, providing reliable operation even under fault conditions. Measuring just 40×13×24mm, the G7SA-3A1B supports both PCB mounting and socket mounting via the P7SA series sockets. The G7SA-3A1B meets CE machinery directive requirements and is ideal for safety circuits in stamping machines, machine tools, and other production equipment.
G7SA-3A1B Core Features
Forcibly Guided Contact Mechanism： The G7SA-3A1B features forcibly guided contacts certified to EN/IEC 61810-3 (VDE), ensuring simultaneous switching of NO and NC contact groups to maintain reliable operation under fault conditions.
4-Pole Contact Configuration： The G7SA-3A1B offers 3a1b contact arrangement (3 NO + 1 NC) with 6A contact rating and 250VAC/125VDC maximum switching voltage. The G7SA-3A1B contact material is silver alloy with gold plating, maximum contact resistance 100mΩ.
Multiple Coil Voltage Options： The G7SA-3A1B supports coil voltages DC12V, 18V, 21V, 24V, 48V, and 110V for flexible system integration.
Ultra-Slim Compact Design： The G7SA-3A1B measures just 40×13×24mm, its slim profile saves valuable control cabinet space for high-density installations.
Dual Mounting Options： The G7SA-3A1B supports both direct PCB soldering and socket mounting with P7SA series sockets (e.g., P7SA-10F-ND) for DIN rail or panel installation.
Reinforced Insulation Structure： The G7SA-3A1B features reinforced insulation between input/output and between certain poles for enhanced safety and reliability.
Wide Operating Temperature Range： The G7SA-3A1B operates from -40℃ to 85℃, suitable for various industrial environments.
Long Service Life： The G7SA-3A1B offers mechanical endurance up to 10,000,000 operations, electrical endurance up to 100,000 operations.
G7SA-3A1B Applications
Industrial Safety Control Systems： The G7SA-3A1B is used in safety circuits in stamping machines, machine tools, emergency stop and safety door monitoring circuits
Automated Production Lines： The G7SA-3A1B controls safety door or emergency stop switches in assembly lines and automation equipment
Machinery Protection： The G7SA-3A1B provides interlock circuits to prevent hazardous machine states
Process Control Systems： The G7SA-3A1B delivers signal isolation and safety control
Industrial Machinery and Production Lines： The G7SA-3A1B is widely used in control and safety systems for various industrial machinery
G7SA-3A1B Key Advantages
EN50205/Class A VDE Certified for Safety and Reliability： The G7SA-3A1B is certified to EN50205 Class A and VDE standards. The G7SA-3A1B forcibly guided contact design ensures reliable operation even under fault conditions.
Ultra-Slim (13mm) Space-Saving Design： The G7SA-3A1B is one of the world's narrowest safety relays at just 13mm wide, significantly saving cabinet space for high-density applications.
Forcibly Guided Contacts Ensure Safety： The G7SA-3A1B forcibly guided mechanism ensures simultaneous NO/NC switching to reduce hazardous conditions during machine operation.
Multiple Coil Voltage Options for Flexible Adaptation： The G7SA-3A1B supports DC12V, 18V, 21V, 24V, 48V, and 110V coil voltages for compatibility with different control systems.
Dual Mounting Options for Versatile Applications： The G7SA-3A1B provides PCB soldering or socket mounting with P7SA series sockets for DIN rail or panel installation.
Long Life and High Reliability： The G7SA-3A1B offers mechanical life of 10,000,000 cycles and electrical life of 100,000 cycles for long-term stable operation and reduced maintenance costs.
Reinforced Insulation and Vibration Resistance： The G7SA-3A1B withstands shock up to 1,000 m/s² and vibration up to 55Hz for harsh industrial environments.
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FAQ
1. What is G7SA-3A1B？
The G7SA-3A1B is a compact, slim safety relay with forcibly guided contacts from OMRON. The G7SA-3A1B conforms to EN standardsand is a core component for building safety control circuits in machinery.
2. What are the key specifications of G7SA-3A1B？
Key specifications of the G7SA-3A1B include:
Contact Configuration: The G7SA-3A1B provides 3a1b (3 NO contacts + 1 NC contact)
Contact Current Rating: The G7SA-3A1B is rated 6A
Switching Voltage: The G7SA-3A1B supports 250VAC / 125VDC
Coil Voltage (DC): The G7SA-3A1B is available with 12V, 18V, 21V, 24V, 48V, 110V
Coil Power Consumption: The G7SA-3A1B consumes approx. 360mW
Operating Temperature: The G7SA-3A1B works from -40°C ~ +85°C
Dimensions: The G7SA-3A1B measures 40 x 13 x 24mm (LxWxH), only 13mm wide
3. What package does G7SA-3A1B use？
The G7SA-3A1B本体 features PCB terminals with a flux-tight protection construction. The G7SA-3A1B supports through-hole mounting or socketable (plug-in) mounting.
4. What applications is G7SA-3A1B suitable for？
The G7SA-3A1B is suitable for safety circuits in various production machinery, including:
Press machinery
Machine tools
High-risk applications like elevators, robotics, and packaging machinery
Any interlocking circuit designed to avoid hazardous machine status
5. What development tools support G7SA-3A1B？
The G7SA-3A1B is a standard industrial component and does not require dedicated software tools.
6. What is the operating temperature range of G7SA-3A1B？
The operating temperature range of the G7SA-3A1B is -40°C to +85°C.
7. What are the key features of G7SA-3A1B？
Forcibly guided contacts: The G7SA-3A1B is compliant with EN50205 Class A and VDE certified for safety
Ultra-slim design: The G7SA-3A1B is only 13mm wide, one of the narrowest safety relays
Reinforced insulation: The G7SA-3A1B provides reinforced insulation between input and output
CE marking: The G7SA-3A1B supports CE marking (Machinery Directive)
Socket options: The G7SA-3A1B is compatible with P7SA series sockets for DIN rail or panel mounting
8. What is the difference between G7SA-3A1B and G7SA-2A2B？
The main difference between G7SA-3A1B and G7SA-2A2B is the contact configuration:
G7SA-3A1B: 3a1b (3NO + 1NC)
G7SA-2A2B: 2a2b (2NO + 2NC)
9. What are the alternative models for G7SA-3A1B？
The G7SA-3A1B series offers various contact combinations and pole counts:
4-pole models: G7SA-3A1B (3a1b), G7SA-2A2B (2a2b)
6-pole models: G7SA-5A1B (5a1b), G7SA-4A2B (4a2b), G7SA-3A3B (3a3b)
10. What are the design considerations when using G7SA-3A1B？
Safety relay socket required: For DIN rail or panel mounting the G7SA-3A1B, the P7SA series socket (e.g., P7SA-10F-ND) must be purchased separately
Wiring confirmation: A flyback diode (e.g., 1N4007) must be connected in parallel across the G7SA-3A1B coil terminals to absorb the back EMF during power-off, protecting the control contacts or drive circuit
Forcibly guided contacts: The G7SA-3A1B forcibly guided contacts are the core of a safety relay and must not be used as a substitute for ordinary relays in non-safety circuits