Equivalent & Substitute Parts for JS1AF-12V-F

Part Overview

The JS1AF-12V-F is a general purpose relay manufactured by Panasonic Electric Works, featuring a SPST-NO (1 Form A) contact configuration with a 12VDC coil. This through-hole mounted relay is designed for switching applications up to 10A at 250VAC or 100VDC. The product is currently obsolete, making equivalent substitute parts necessary for ongoing maintenance, repair, and new design implementations where this relay specification remains applicable.

Substiute Parts

JS1AF-12V-F

Panasonic Electric WorksIn Stock: 1133JS1AF-12V-F Datasheet

Current PartRFQ

ALQ312

Panasonic Electric WorksIn Stock: 63836ALQ312 Datasheet

SimilarRFQ

J107F1AS1212VDC.36

CIT Relay and SwitchIn Stock: 908J107F1AS1212VDC.36 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the JS1AF-12V-F is determined by the following critical parameters:

• Coil Voltage: Must be 12VDC 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 ensure PCB compatibility
• Termination Style: Must be PC Pin for direct connection to printed circuit boards
• Contact Rating (Current): Minimum 10A required; higher ratings are acceptable for applications within the original switching voltage limits
• Switching Voltage: Must support at least 250VAC or 100VDC; higher ratings provide additional design margin

The two substitute parts identified meet these core substitution criteria while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

ALQ312 (Panasonic Electric Works)

The ALQ312 maintains Panasonic Electric Works manufacturing continuity and offers ROHS3 compliance with extended temperature range (-40°C ~ 85°C). However, the contact rating is reduced to 5A, making this substitute suitable only for applications where the switching current does not exceed 5A. The maximum switching voltage is also limited to 250VAC and 30VDC. This part is appropriate for low-current switching applications within the original design envelope.

J107F1AS1212VDC.36 (CIT Relay and Switch)

The J107F1AS1212VDC.36 provides the highest current rating (12A) and switching voltage capability (380VAC, 110VDC), exceeding the original specification. It maintains identical coil current (30mA) and coil resistance (400 Ohms) as the JS1AF-12V-F, ensuring compatible drive circuit requirements. The extended operating temperature range (-55°C ~ 125°C) and fully sealed construction provide enhanced environmental protection. This part is the preferred substitute for applications requiring full parameter compatibility or enhanced performance margins.

Frequently Asked Questions (FAQ)

Q: Can ALQ312 be used as a direct replacement for JS1AF-12V-F?

A: ALQ312 is electrically compatible for coil voltage and contact form, but the 5A contact rating limits its use to applications where switching current does not exceed 5A. The original JS1AF-12V-F is rated for 10A, so ALQ312 is suitable only for reduced-current applications.

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

A: J107F1AS1212VDC.36 provides higher current (12A) and voltage ratings with faster release time (5ms vs 10ms), while ALQ312 offers lower coil current (16.7mA vs 30mA) and reduced switching voltage limits. J107F1AS1212VDC.36 is the more capable substitute for full specification compatibility.

Q: Are both substitutes compatible with the original PCB layout?

A: Yes. Both substitutes use through-hole mounting with PC pin termination, matching the JS1AF-12V-F footprint and connection method.

Q: What is the impact of different contact materials (AgSnO vs AgNi)?

A: Contact material differences affect arc resistance and contact wear characteristics. AgSnO (Silver Tin Oxide) provides better arc suppression, while AgNi (Silver Nickel) offers different wear profiles. Both are suitable for general purpose relay applications.

Q: Which substitute should be selected for new designs?

A: J107F1AS1212VDC.36 is recommended for new designs, as it provides full parameter compatibility with the original specification, active product status, and enhanced environmental performance across a wider temperature range.