JS1AF-F-12V-F General Purpose Relay SPST 10A 12VDC

Part Overview

The JS1AF-F-12V-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 12VDC coil. This through-hole mounted relay is rated for 10A continuous contact current and supports switching loads up to 250VAC or 100VDC maximum. The product is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

Substiute Parts

JS1AF-F-12V-F

Panasonic Electric WorksIn Stock: 1017JS1AF-F-12V-F Datasheet

Current PartRFQ

ALQ3F12

Panasonic Electric WorksIn Stock: 2300ALQ3F12 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the JS1AF-F-12V-F is determined by the following critical parameters that must remain consistent:

• Coil voltage: 12VDC (mandatory match)
• Contact form: SPST-NO (1 Form A) (mandatory match)
• Mounting type: Through hole (mandatory match)
• Termination style: PC Pin (mandatory match)
• Coil type: Non-latching (mandatory match)

The ALQ3F12 satisfies these core substitution criteria. However, the substitute part exhibits reduced electrical performance in contact current rating (5A versus 10A) and maximum switching voltage (250VAC/30VDC versus 250VAC/100VDC). These reductions must be evaluated against the specific application requirements. The ALQ3F12 operates within a narrower temperature range (-40°C to 85°C versus -40°C to 105°C) and uses different contact material (Silver Nickel versus Silver Tin Oxide).

Parameter Comparison

Engineering Selection Recommendations

The ALQ3F12 is an active product from the same manufacturer, providing continuity of supply for the obsolete JS1AF-F-12V-F. Both relays comply with RoHS requirements, with the ALQ3F12 meeting the more recent ROHS3 standard. The ALQ3F12 carries additional approval certifications (CQC, cURuus, VDE) and is unaffected by REACH regulations.

Selection of the ALQ3F12 as a substitute is appropriate when application requirements permit operation within its reduced electrical specifications: 5A maximum contact current and 30VDC maximum DC switching voltage. Applications requiring the full 10A contact current or 100VDC switching capability of the original JS1AF-F-12V-F cannot use the ALQ3F12 without circuit redesign.

The ALQ3F12 exhibits slower switching response (20ms operate and release time versus 10ms), which may impact timing-sensitive applications. The narrower operating temperature range (-40°C to 85°C) must be verified against environmental requirements, particularly for high-temperature applications approaching 105°C.

Frequently Asked Questions (FAQ)

Q: Can the ALQ3F12 directly replace the JS1AF-F-12V-F in all applications?

A: Direct replacement is limited to applications where the contact current requirement does not exceed 5A and the maximum DC switching voltage does not exceed 30VDC. The original part supports 10A and 100VDC respectively. Circuit analysis is required to confirm compatibility.

Q: What are the key differences between these two relays?

A: The primary differences are contact current rating (10A versus 5A), maximum DC switching voltage (100VDC versus 30VDC), switching response time (10ms versus 20ms), operating temperature range (-40°C to 105°C versus -40°C to 85°C), and contact material composition (Silver Tin Oxide versus Silver Nickel).

Q: Are both relays compatible with the same PCB footprint?

A: Both relays use through-hole PC pin termination and are mounted identically. Physical footprint compatibility should be confirmed through dimensional drawings, as the question addresses mechanical fit rather than electrical substitution.

Q: Does the ALQ3F12 meet current compliance standards?

A: Yes. The ALQ3F12 is ROHS3 compliant, REACH unaffected, and carries certifications from CQC, cURuus, and VDE. The original JS1AF-F-12V-F is RoHS compliant but is obsolete.

Q: What is the impact of the different coil current specifications?

A: The ALQ3F12 requires 16.7mA coil current versus 30mA for the JS1AF-F-12V-F. This lower coil current reduces power consumption and heat generation, which may benefit circuit design but does not affect substitution feasibility if the driving circuit can supply the required voltage.