JS1APF-B-5V-F Equivalent & Substitute Parts

Part Overview

The JS1APF-B-5V-F is a general purpose relay manufactured by Panasonic Electric Works, configured as a SPST-NO (1 Form A) with a 5VDC coil and 10A contact rating. This through-hole mounted relay is designed for general switching applications requiring sealed flux protection and operates across an industrial temperature range of -40°C to 85°C.

The JS1APF-B-5V-F is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this relay.

Substiute Parts

JS1APF-B-5V-F

Panasonic Electric WorksIn Stock: 733JS1APF-B-5V-F Datasheet

Current PartRFQ

ALQ305

Panasonic Electric WorksIn Stock: 2040ALQ305 Datasheet

SimilarRFQ

J107F1AS125VDC.36

CIT Relay and SwitchIn Stock: 1440J107F1AS125VDC.36 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the JS1APF-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 switching functionality
• Mounting Type: Must be through-hole to fit existing PCB layouts
• Termination Style: Must be PC Pin for direct board connection
• Contact Rating (Current): Must meet or exceed 10A to handle the intended load
• Switching Voltage: Must support 250VAC and 100VDC maximum switching conditions
• Coil Type: Must be non-latching for standard momentary switching operation

Two substitute parts meet these criteria: ALQ305 (Panasonic Electric Works) and J107F1AS125VDC.36 (CIT Relay and Switch). Both maintain the essential electrical and mechanical characteristics required for functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

ALQ305 (Panasonic Electric Works)

The ALQ305 is an active product from the same manufacturer as the original part, ensuring design continuity and supply chain familiarity. It maintains identical coil voltage, contact form, mounting type, and termination style. However, the ALQ305 has a reduced contact rating of 5A compared to the original 10A specification, making it unsuitable for applications requiring the full 10A switching capacity. The ALQ305 also exhibits reduced DC switching voltage capability (30VDC maximum versus 100VDC) and increased coil resistance (125 Ohms versus 69.4 Ohms). Selection of this part requires verification that the application load does not exceed 5A and operates within 30VDC DC switching limits.

J107F1AS125VDC.36 (CIT Relay and Switch)

The J107F1AS125VDC.36 is an active product that exceeds the original specifications in multiple critical parameters. It provides a 12A contact rating, surpassing the original 10A requirement, and supports higher switching voltages (380VAC and 110VDC). The coil resistance (70 Ohms) and coil current (71.4 mA) closely match the original part, ensuring compatible circuit behavior. The J107F1AS125VDC.36 features Class F coil insulation (versus Class B) and fully sealed construction, providing enhanced environmental protection. The extended operating temperature range (-55°C to 125°C) exceeds the original specification. This part is fully compatible with the original design and offers improved performance margins.

Both substitute parts carry RoHS compliance certifications. The J107F1AS125VDC.36 is the preferred substitute for direct replacement in applications requiring the full 10A switching capacity and standard operating conditions.

Frequently Asked Questions (FAQ)

Q: Can the ALQ305 be used as a direct replacement for the JS1APF-B-5V-F?

A: The ALQ305 shares the same coil voltage, contact form, mounting type, and termination style. However, its 5A contact rating is insufficient for applications requiring 10A switching capacity. Use ALQ305 only in applications where the load current does not exceed 5A and DC switching voltage remains below 30VDC.

Q: What are the key differences between the two substitute parts?

A: The J107F1AS125VDC.36 provides superior current handling (12A versus 5A for ALQ305), higher DC switching voltage support (110VDC versus 30VDC), and fully sealed construction. The ALQ305 offers lower coil current (40mA versus 71.4mA) but reduced overall performance margins. For applications matching the original 10A specification, J107F1AS125VDC.36 is the appropriate choice.

Q: Are there packaging differences between these parts?

A: Yes. The JS1APF-B-5V-F uses standard packaging. The ALQ305 is supplied in box packaging, while the J107F1AS125VDC.36 is supplied in tube packaging. Verify packaging compatibility with your assembly and handling processes.

Q: Do the substitute parts have the same coil resistance?

A: The J107F1AS125VDC.36 has a coil resistance of 70 Ohms, nearly identical to the original 69.4 Ohms, ensuring compatible circuit behavior. The ALQ305 has 125 Ohms resistance, which will affect coil current draw and circuit timing characteristics.

Q: What is the impact of different contact materials?

A: The original part and J107F1AS125VDC.36 use Silver Tin Oxide (AgSnO) contact material. The ALQ305 uses Silver Nickel (AgNi). Both materials are suitable for general purpose switching; however, contact material differences may affect performance in specific load conditions or environments.

Q: Are all substitute parts RoHS compliant?

A: Yes. The JS1APF-B-5V-F is RoHS Compliant, the ALQ305 is ROHS3 Compliant, and the J107F1AS125VDC.36 is RoHS Compliant. All parts meet current environmental compliance requirements.

Q: Which substitute part should be selected for new designs?

A: The J107F1AS125VDC.36 is recommended for new designs requiring 10A switching capacity. It is an active product with superior performance margins, extended temperature range, and fully sealed construction. The ALQ305 is suitable only for applications with reduced current requirements (≤5A).