FGRMS31-24-LED Equivalent & Substitute Parts

Part Overview

The FGRMS31-24-LED is a 24VDC industrial relay manufactured by Omron Automation and Safety, configured as a 4PST relay with 3 Form A and 1 Form B contact arrangement. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance and new design implementations. The relay features a lighted indicator and screw terminal termination, designed for DIN Rail mounting in industrial control applications.

Key Parameters

Parameter	Value
Coil Voltage	24VDC
Contact Form	4PST-3NO/1NC (3 Form A, 1 Form B)
Contact Rating (Current)	6 A
Switching Voltage	250VAC, 125VDC - Max
Mounting Type	DIN Rail
Coil Current	15 mA
Coil Resistance	1.6 kOhms
Operating Temperature	-40°C ~ 85°C
Release Time	10 ms
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the FGRMS31-24-LED is determined by strict equivalence across the following critical parameters:

Coil voltage: 24VDC
Contact configuration: 4PST with 3 Form A and 1 Form B contacts
Contact current rating: 6 A minimum
Switching voltage capability: 250VAC, 125VDC maximum
Coil current: 15 mA
Coil resistance: 1.6 kOhms
Operating temperature range: -40°C to 85°C
Release time: 10 ms

The G7SA-3A1B-DC24 meets all electrical and mechanical substitution criteria as a direct relay replacement. The P7SA-14F-ND DC24 is a complementary socket component for the G7SA series and is not a direct relay substitute but rather an accessory for relay mounting on DIN Rail systems.

Parameter Comparison

Parameter	FGRMS31-24-LED	G7SA-3A1B-DC24	P7SA-14F-ND DC24
Manufacturer	Omron Automation and Safety	Omron Automation and Safety	Omron Automation and Safety
Product Status	Obsolete	Active	Active
Coil Voltage	24VDC	24VDC	N/A (Socket)
Contact Form	4PST-3NO/1NC	4PST-3NO/1NC	N/A (Socket)
Contact Rating (Current)	6 A	6 A	N/A (Socket)
Switching Voltage	250VAC, 125VDC - Max	250VAC, 125VDC - Max	N/A (Socket)
Mounting Type	DIN Rail	Socketable, Through Hole	DIN Rail
Coil Current	15 mA	15 mA	N/A (Socket)
Coil Resistance	1.6 kOhms	1.6 kOhms	N/A (Socket)
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	N/A (Socket)
Release Time	10 ms	10 ms	N/A (Socket)
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant
REACH Status	Vendor Undefined	REACH Unaffected	REACH Affected

Engineering Selection Recommendations

The G7SA-3A1B-DC24 is the direct functional equivalent for FGRMS31-24-LED relay replacement. Both components share identical electrical specifications across coil voltage, contact configuration, current rating, and switching voltage parameters. The G7SA-3A1B-DC24 holds active product status with ROHS3 compliance and REACH unaffected classification, providing regulatory advantage over the obsolete FGRMS31-24-LED.

Mounting configuration differs between the two relays: the FGRMS31-24-LED uses screw terminal DIN Rail mounting, while the G7SA-3A1B-DC24 employs socketable through-hole termination. For DIN Rail screw terminal applications, the P7SA-14F-ND DC24 socket provides mechanical compatibility with the G7SA-3A1B-DC24 relay, enabling direct substitution within existing DIN Rail infrastructure.

Frequently Asked Questions (FAQ)

Q: Can the G7SA-3A1B-DC24 directly replace the FGRMS31-24-LED in all applications?

A: The G7SA-3A1B-DC24 provides electrical equivalence across all specified parameters. Mechanical integration depends on termination style compatibility. The FGRMS31-24-LED uses screw terminals for direct DIN Rail mounting, while the G7SA-3A1B-DC24 uses PC pin plug-in termination. Use the P7SA-14F-ND DC24 socket to mount the G7SA-3A1B-DC24 on DIN Rail systems.

Q: What are the critical parameters for relay substitution?

A: Coil voltage (24VDC), contact configuration (4PST-3NO/1NC), contact current rating (6 A), switching voltage (250VAC, 125VDC maximum), coil current (15 mA), coil resistance (1.6 kOhms), operating temperature range (-40°C to 85°C), and release time (10 ms) must match or exceed the original specification.

Q: Is the P7SA-14F-ND DC24 a relay substitute?

A: No. The P7SA-14F-ND DC24 is a 14-position DIN Rail socket designed for G7SA series relay mounting. It is a complementary accessory component, not a relay substitute. It enables mechanical integration of socketable relays into DIN Rail systems.

Q: What compliance advantages does the G7SA-3A1B-DC24 offer?

A: The G7SA-3A1B-DC24 is ROHS3 compliant and REACH unaffected, providing regulatory compliance for modern industrial applications. The obsolete FGRMS31-24-LED has undefined REACH status and unspecified RoHS compliance.

Q: Are there differences in contact material between the relays?

A: The FGRMS31-24-LED contact material is not specified. The G7SA-3A1B-DC24 uses Silver (Ag) and Gold (Au) contact materials, providing enhanced reliability and corrosion resistance in industrial environments.

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