JS1AF-F-5V-F General Purpose Relay SPST-NO 5VDC Equivalent & Substitute Parts

Part Overview

The JS1AF-F-5V-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 5VDC coil. This through-hole mounted relay is rated for 10A continuous contact current and is designed for general switching applications in industrial and commercial equipment.

The JS1AF-F-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 field replacement requirements for systems utilizing this relay.

Substiute Parts

JS1AF-F-5V-F

Panasonic Electric WorksIn Stock: 1113JS1AF-F-5V-F Datasheet

Current PartRFQ

ALQ3F05

Panasonic Electric WorksIn Stock: 2545ALQ3F05 Datasheet

SimilarRFQ

J107F1AS125VDC.36

CIT Relay and SwitchIn Stock: 1440J107F1AS125VDC.36 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the JS1AF-F-5V-F must satisfy the following core electrical and mechanical criteria:

Mandatory Matching Parameters:

• Coil Voltage: 5VDC
• Contact Form: SPST-NO (1 Form A)
• Mounting Type: Through Hole
• Termination Style: PC Pin
• Coil Type: Non Latching

Allowable Variation Parameters:

• Contact Rating (Current): Equal to or greater than 10A
• Switching Voltage: Equal to or greater than 250VAC and 100VDC
• Coil Current: Within reasonable operational tolerance
• Operating Temperature Range: Must encompass or exceed -40°C ~ 105°C
• Coil Insulation: Class F or equivalent
• Contact Material: Silver-based compositions (AgSnO, AgNi, or equivalent)
• RoHS Compliance: Must maintain or exceed compliance status

Two substitute parts meet these criteria and are identified below.

Parameter Comparison

Engineering Selection Recommendations

ALQ3F05 (Panasonic Electric Works)

The ALQ3F05 is an active product from the same manufacturer as the main part, ensuring design continuity and supply chain familiarity. It maintains identical coil voltage, contact form, mounting type, and termination style. The ALQ3F05 is ROHS3 compliant, exceeding the RoHS compliance of the obsolete JS1AF-F-5V-F.

Limitation: The ALQ3F05 has a contact rating of 5A, which is below the 10A rating of the main part. This substitute is suitable only for applications where the actual load current does not exceed 5A, regardless of the original design specification. The maximum switching voltage is also reduced to 250VAC and 30VDC, limiting its use in higher voltage switching scenarios. The operating temperature range is restricted to -40°C ~ 85°C, which does not cover the upper temperature limit of the original part.

J107F1AS125VDC.36 (CIT Relay and Switch)

The J107F1AS125VDC.36 is an active product that exceeds the electrical performance of the main part. It provides a 12A contact rating, surpassing the 10A requirement, and supports higher switching voltages (380VAC, 110VDC). The operating temperature range of -55°C ~ 125°C encompasses and exceeds the original specification. Coil current and resistance are nearly identical to the main part, ensuring compatible drive circuitry. The contact material is Silver Tin Oxide, matching the original part. RoHS compliance is maintained.

This substitute is suitable for direct replacement in applications requiring equal or greater electrical performance and is recommended for new designs or field replacements where supply of the obsolete JS1AF-F-5V-F is unavailable.

Frequently Asked Questions (FAQ)

Q: Can the ALQ3F05 be used as a direct replacement for the JS1AF-F-5V-F?

A: The ALQ3F05 is mechanically and electrically compatible in terms of coil voltage, contact form, and mounting configuration. However, the 5A contact rating is insufficient for applications designed for 10A switching. Use the ALQ3F05 only if the actual circuit load current does not exceed 5A. The reduced maximum switching voltage (30VDC vs. 100VDC) and lower upper temperature limit (85°C vs. 105°C) must also be evaluated against application requirements.

Q: Is the J107F1AS125VDC.36 a suitable replacement?

A: Yes. The J107F1AS125VDC.36 meets or exceeds all critical parameters of the JS1AF-F-5V-F. It provides higher contact current capacity (12A vs. 10A), higher switching voltage capability (380VAC, 110VDC vs. 250VAC, 100VDC), and an extended operating temperature range (-55°C ~ 125°C vs. -40°C ~ 105°C). Coil voltage, contact form, mounting type, and termination style are identical. This part is recommended for direct replacement.

Q: What is the impact of different coil resistance values?

A: The JS1AF-F-5V-F has a coil resistance of 69.4 Ohms, the ALQ3F05 has 125 Ohms, and the J107F1AS125VDC.36 has 70 Ohms. Higher coil resistance requires higher voltage to achieve the same coil current. The ALQ3F05's significantly higher resistance (125 Ohms) results in lower coil current (40 mA vs. 72 mA), which may affect relay response time and reliability in circuits designed for the original 72 mA specification. The J107F1AS125VDC.36, with 70 Ohms resistance, is nearly identical and poses no compatibility concern.

Q: Are there packaging differences between these parts?

A: Yes. The JS1AF-F-5V-F is supplied in bulk packaging, the ALQ3F05 in box packaging, and the J107F1AS125VDC.36 in tube packaging. Packaging does not affect electrical or mechanical compatibility but may influence procurement, handling, and storage procedures.

Q: What certifications do these parts carry?

A: The JS1AF-F-5V-F is RoHS Compliant. The ALQ3F05 is ROHS3 Compliant and carries CQC, cURuus, and VDE approvals. The J107F1AS125VDC.36 is RoHS Compliant and REACH Unaffected. All three parts are classified as EAR99 for export control purposes.