JS1A-B-24V-F Equivalent & Substitute Parts

Part Overview

The JS1A-B-24V-F is a general purpose relay manufactured by Panasonic Electric Works, configured as a single-pole single-throw normally open (SPST-NO) contact form with a 24VDC coil. This through-hole mounted relay is rated for 10A at 250VAC or 100VDC maximum switching voltage. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new designs requiring compatible functionality.

Key Parameters

Parameter	Value
Manufacturer Part Number	JS1A-B-24V-F
Manufacturer	Panasonic Electric Works
Series	JS
Coil Voltage	24VDC
Contact Form	SPST-NO (1 Form A)
Contact Rating (Current)	10 A
Switching Voltage	250VAC, 100VDC - Max
Mounting Type	Through Hole
Termination Style	PC Pin
Operating Temperature	-40°C ~ 85°C
Coil Type	Non Latching
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the JS1A-B-24V-F is determined by the following critical parameters:

Coil Voltage: Must be 24VDC to ensure direct compatibility with existing control circuits
Contact Form: Must be SPST-NO (1 Form A) to maintain identical switching logic
Mounting Type: Must be Through Hole to fit existing PCB layouts
Termination Style: Must be PC Pin for direct board connection
Coil Type: Must be Non Latching for equivalent operational behavior

Two substitute parts meet these core requirements with variations in contact rating and switching voltage specifications.

Parameter Comparison

Parameter	JS1A-B-24V-F	ALQ324	J107F1AS1224VDC.36
Manufacturer	Panasonic Electric Works	Panasonic Electric Works	CIT Relay and Switch
Series	JS	ALQ	J107F
Coil Voltage	24VDC	24VDC	24VDC
Contact Form	SPST-NO (1 Form A)	SPST-NO (1 Form A)	SPST-NO (1 Form A)
Contact Rating (Current)	10 A	5 A	12 A
Switching Voltage - Max	250VAC, 100VDC	250VAC, 30VDC	380VAC, 110VDC
Mounting Type	Through Hole	Through Hole	Through Hole
Termination Style	PC Pin	PC Pin	PC Pin
Coil Type	Non Latching	Non Latching	Non Latching
Coil Current	15 mA	8.3 mA	15 mA
Operate Time	10 ms	20 ms	10 ms
Release Time	10 ms	20 ms	5 ms
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-55°C ~ 125°C
Contact Material	Silver Tin Oxide (AgSnO)	Silver Nickel (AgNi)	Silver Tin Oxide (AgSnO)
Seal Rating	Sealed - Fully	Not specified	Sealed - Fully
Product Status	Obsolete	Active	Active
RoHS Status	RoHS Compliant	ROHS3 Compliant	RoHS Compliant

Engineering Selection Recommendations

ALQ324 (Panasonic Electric Works)

The ALQ324 is an active product from the same manufacturer as the original part. It maintains identical coil voltage, contact form, mounting type, and termination style. However, the contact rating is reduced to 5A compared to the original 10A specification. This substitute is suitable only for applications where the load current does not exceed 5A. The ALQ324 features lower coil current (8.3 mA versus 15 mA) and extended switching times (20 ms operate and release versus 10 ms). RoHS3 compliance provides current regulatory alignment.

J107F1AS1224VDC.36 (CIT Relay and Switch)

The J107F1AS1224VDC.36 is an active product that exceeds the original contact rating at 12A, providing margin above the 10A specification. It maintains identical coil voltage, contact form, mounting type, and termination style. Switching voltage capability is higher at 380VAC and 110VDC maximum. Operate time matches the original at 10 ms, with faster release time at 5 ms. Operating temperature range extends to -55°C to 125°C. Contact material is identical (Silver Tin Oxide). Full seal rating is maintained. This substitute provides direct functional replacement with enhanced current capacity and extended temperature range.

Frequently Asked Questions (FAQ)

Q: Can ALQ324 be used as a direct replacement for JS1A-B-24V-F?

A: ALQ324 is mechanically and electrically compatible in terms of coil voltage, contact form, mounting, and termination. However, the contact rating is 5A versus the original 10A. Use ALQ324 only if your application load current does not exceed 5A.

Q: Is J107F1AS1224VDC.36 a direct replacement for JS1A-B-24V-F?

A: Yes. J107F1AS1224VDC.36 maintains all critical parameters: 24VDC coil, SPST-NO contact form, through-hole mounting, and PC pin termination. Contact rating is 12A, exceeding the original 10A specification. Switching voltage and temperature range are equal or superior.

Q: What is the difference in switching voltage between the substitutes?

A: JS1A-B-24V-F and J107F1AS1224VDC.36 both support 250VAC minimum. J107F1AS1224VDC.36 supports 380VAC maximum versus 250VAC for the original. For DC switching, J107F1AS1224VDC.36 supports 110VDC versus 100VDC for the original. ALQ324 is limited to 30VDC DC switching.

Q: Does packaging differ between these parts?

A: Yes. JS1A-B-24V-F uses standard packaging. ALQ324 is supplied in Box packaging. J107F1AS1224VDC.36 is supplied in Tube packaging. Verify packaging compatibility with your procurement and assembly processes.

Q: Are all substitutes RoHS compliant?

A: Yes. JS1A-B-24V-F is RoHS Compliant. ALQ324 is ROHS3 Compliant. J107F1AS1224VDC.36 is RoHS Compliant. All meet current environmental regulations.

Q: What is the coil insulation class difference?

A: JS1A-B-24V-F and ALQ324 use Class B coil insulation. J107F1AS1224VDC.36 uses Class F coil insulation, which provides higher temperature capability for the coil winding.

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