FGRMS31-24 Equivalent & Substitute Parts

Part Overview

The FGRMS31-24 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, necessitating identification of active equivalent parts to maintain system functionality and ensure continued availability for new designs and maintenance 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
Coil Current	15 mA
Coil Power	360mW
Coil Resistance	1.6 kOhms
Operating Temperature Range	-40°C ~ 85°C
Release Time	10 ms
Termination Style	Screw Terminal
Mounting Type	DIN Rail
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

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

Coil voltage: 24VDC
Contact configuration: 4PST with 3NO/1NC arrangement
Contact current rating: 6 A minimum
Switching voltage capability: 250VAC, 125VDC maximum
Coil electrical characteristics: 15 mA current, 360mW power, 1.6 kOhms resistance
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-10F is a complementary socket component for G7SA series relays and serves as an accessory for DIN rail mounting applications.

Parameter Comparison

Parameter	FGRMS31-24	G7SA-3A1B-DC24	P7SA-10F
Coil Voltage	24VDC	24VDC	N/A
Contact Form	4PST-3NO/1NC	4PST-3NO/1NC	N/A
Contact Rating (Current)	6 A	6 A	N/A
Switching Voltage	250VAC, 125VDC - Max	250VAC, 125VDC - Max	N/A
Coil Current	15 mA	15 mA	N/A
Coil Power	360mW	360mW	N/A
Coil Resistance	1.6 kOhms	1.6 kOhms	N/A
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	N/A
Release Time	10 ms	10 ms	N/A
Mounting Type	DIN Rail	Socketable, Through Hole	DIN Rail
Termination Style	Screw Terminal	PC Pin, Plug In	Screw Terminal
Product Status	Obsolete	Active	Active
RoHS Status	Not Specified	ROHS3 Compliant	ROHS3 Compliant
REACH Status	Vendor Undefined	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The G7SA-3A1B-DC24 is the direct functional equivalent to the FGRMS31-24 for relay replacement applications. 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 certification, providing regulatory compliance advantages over the obsolete FGRMS31-24.

Mounting and termination differences exist between the two relays. The FGRMS31-24 uses screw terminal connections on DIN rail, while the G7SA-3A1B-DC24 employs PC pin plug-in termination with socketable mounting. The P7SA-10F socket accessory enables DIN rail integration of G7SA series relays and provides screw terminal connectivity, facilitating mechanical and electrical compatibility in existing DIN rail installations.

Frequently Asked Questions (FAQ)

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

A: The G7SA-3A1B-DC24 provides electrical equivalence across all critical parameters: 24VDC coil voltage, 4PST-3NO/1NC contact configuration, 6 A current rating, and 250VAC/125VDC switching voltage. Mechanical integration requires accommodation of different termination styles. Direct screw terminal connection is not available on the G7SA-3A1B-DC24; the P7SA-10F socket provides DIN rail mounting with screw terminal access.

Q: What is the function of the P7SA-10F socket?

A: The P7SA-10F is a DIN rail-mounted socket designed for G7SA series relays. It provides 10-position capacity and screw terminal connectivity, enabling integration of G7SA relays into existing DIN rail control systems that use screw terminal wiring.

Q: Are there compliance differences between the FGRMS31-24 and G7SA-3A1B-DC24?

A: The G7SA-3A1B-DC24 carries ROHS3 compliance and REACH unaffected certification. The FGRMS31-24 has undefined REACH status and no specified RoHS compliance. For new designs and applications subject to regulatory requirements, the G7SA-3A1B-DC24 is the compliant choice.

Q: Do the relays have identical operating characteristics?

A: Both relays operate across -40°C to 85°C temperature range with 10 ms release time. The G7SA-3A1B-DC24 specifies additional operating parameters: 18 VDC must-operate voltage, 2.4 VDC must-release voltage, and 20 ms operate time. These parameters define the relay's response envelope within the specified operating range.

Q: What termination options are available for G7SA series relays in DIN rail applications?

A: The G7SA-3A1B-DC24 relay uses PC pin plug-in termination. The P7SA-10F socket provides screw terminal connectivity for DIN rail installations, converting the relay's PC pin interface to screw terminal access for field wiring.

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