JS1AF-B-5V-F Equivalent & Substitute Parts

Part Overview

The JS1AF-B-5V-F is a general purpose relay manufactured by Panasonic Electric Works, featuring a SPST-NO (1 Form A) contact configuration with a 5VDC coil and 10A contact rating. This through-hole mounted relay is designed for general switching applications with a maximum switching voltage of 250VAC or 100VDC. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations.

Key Parameters

Parameter	Value
Coil Voltage	5VDC
Contact Form	SPST-NO (1 Form A)
Contact Rating (Current)	10 A
Mounting Type	Through Hole
Termination Style	PC Pin
Coil Type	Non Latching
Operating Temperature Range	-40°C ~ 85°C
Coil Insulation	Class B
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the JS1AF-B-5V-F is determined by the following critical parameters:

Coil Voltage: Must be 5VDC to ensure direct compatibility with existing circuit designs
Contact Form: Must be SPST-NO (1 Form A) to maintain identical switching functionality
Mounting Type: Must be Through Hole to fit existing PCB layouts
Termination Style: Must be PC Pin for direct connection compatibility
Coil Type: Must be Non Latching to preserve operational behavior

The substitute parts identified meet these core requirements. However, variations in contact rating, switching voltage, coil current, and operating temperature ranges exist and must be evaluated based on specific application requirements.

Parameter Comparison

Parameter	JS1AF-B-5V-F (Main)	ALQ305	J107F1AS125VDC.36
Manufacturer	Panasonic Electric Works	Panasonic Electric Works	CIT Relay and Switch
Coil Voltage	5VDC	5VDC	5VDC
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
Coil Current	72 mA	40 mA	71.4 mA
Coil Resistance	69.4 Ohms	125 Ohms	70 Ohms
Mounting Type	Through Hole	Through Hole	Through Hole
Termination Style	PC Pin	PC Pin	PC Pin
Coil Type	Non Latching	Non Latching	Non Latching
Operate Time	10 ms	20 ms	10 ms
Release Time	10 ms	20 ms	5 ms
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	-55°C ~ 125°C
Coil Insulation	Class B	Class B	Class F
Contact Material	Silver Tin Oxide (AgSnO)	Silver Nickel (AgNi)	Silver Tin Oxide (AgSnO)
Product Status	Obsolete	Active	Active
RoHS Status	RoHS Compliant	ROHS3 Compliant	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

ALQ305 (Panasonic Electric Works)

The ALQ305 is an active product from the same manufacturer as the main part, ensuring design continuity and supply chain reliability. It maintains identical coil voltage, contact form, mounting type, and termination style. The ALQ305 features lower coil current (40 mA versus 72 mA), which reduces power consumption in the control circuit. However, the contact rating is reduced to 5A, limiting its use to applications requiring 5A or less. The maximum switching voltage is also reduced to 250VAC/30VDC. This substitute is suitable for low-current switching applications where the reduced contact rating does not compromise system performance. The ALQ305 carries ROHS3 compliance and REACH Unaffected status.

J107F1AS125VDC.36 (CIT Relay and Switch)

The J107F1AS125VDC.36 is an active product offering enhanced electrical performance compared to the main part. It provides a higher contact rating of 12A and superior switching voltage capability (380VAC/110VDC). The coil current is nearly identical to the main part (71.4 mA versus 72 mA), and coil resistance is comparable (70 Ohms versus 69.4 Ohms). This substitute features Class F coil insulation and an extended operating temperature range (-55°C to 125°C), providing greater thermal margin. The J107F1AS125VDC.36 is suitable for applications requiring higher current capacity or extended temperature operation. It maintains RoHS compliance and REACH Unaffected status.

Frequently Asked Questions (FAQ)

Q: Can the ALQ305 directly replace the JS1AF-B-5V-F in all applications?

A: The ALQ305 is mechanically and electrically compatible in terms of coil voltage, contact form, mounting, and termination. However, the reduced contact rating (5A versus 10A) and lower maximum switching voltage (250VAC/30VDC versus 250VAC/100VDC) restrict its use to applications within these limits. Verify that your load current does not exceed 5A before substitution.

Q: Is the J107F1AS125VDC.36 a direct upgrade for the JS1AF-B-5V-F?

A: The J107F1AS125VDC.36 maintains all critical compatibility parameters and offers enhanced performance with higher contact rating (12A) and switching voltage (380VAC/110VDC). The extended operating temperature range (-55°C to 125°C) provides additional thermal capability. This substitute is suitable for applications requiring equal or greater electrical performance than the original part.

Q: What are the key differences in coil current between these parts?

A: The JS1AF-B-5V-F and J107F1AS125VDC.36 have nearly identical coil current (72 mA and 71.4 mA respectively), ensuring compatible control circuit design. The ALQ305 requires significantly lower coil current (40 mA), reducing power consumption in the control circuit but limiting contact capacity.

Q: Are there packaging differences between these substitutes?

A: The JS1AF-B-5V-F uses standard packaging, the ALQ305 is supplied in Box packaging, and the J107F1AS125VDC.36 is supplied in Tube packaging. These packaging differences do not affect electrical or mechanical compatibility but may influence handling and storage procedures.

Q: Do all substitute parts meet current compliance standards?

A: Yes. The ALQ305 is ROHS3 Compliant and REACH Unaffected. The J107F1AS125VDC.36 is RoHS Compliant and REACH Unaffected. Both substitutes meet current regulatory requirements for electronic component use.

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