JS1-F-12V-F Equivalent & Substitute Parts

Part Overview

The JS1-F-12V-F is a general purpose relay manufactured by Panasonic Electric Works, featuring a Single Pole Double Throw (SPDT) contact configuration with a 12VDC coil and 10A contact rating. This through-hole mounted relay is designed for general industrial switching applications with a maximum switching capacity of 2500VA at 250VAC or 1000W at 100VDC.

The JS1-F-12V-F has reached obsolete product status. Identifying equivalent 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

JS1-F-12V-F

Panasonic Electric WorksIn Stock: 870JS1-F-12V-F Datasheet

Current PartRFQ

ALQ1F12

Panasonic Electric WorksIn Stock: 1060ALQ1F12 Datasheet

MFR RecommendedRFQ

J107F1CS1212VDC.36

CIT Relay and SwitchIn Stock: 97896J107F1CS1212VDC.36 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the JS1-F-12V-F must satisfy the following core electrical and mechanical criteria:

Mandatory Matching Parameters:

• Coil Voltage: 12VDC
• Contact Form: SPDT (1 Form C)
• Mounting Type: Through Hole
• Termination Style: PC Pin
• Coil Type: Non Latching

Allowable Parameter Variations: Substitute parts may differ in contact current rating, switching voltage limits, load capacity, operating temperature range, and contact material, provided the substitute meets or exceeds the original part's performance envelope for the intended application. Coil current, operate time, and release time may vary within acceptable operational tolerances.

Two substitute parts meet these criteria: the ALQ1F12 from Panasonic Electric Works and the J107F1CS1212VDC.36 from CIT Relay and Switch. Both maintain the essential 12VDC SPDT through-hole configuration with PC pin termination.

Parameter Comparison

Engineering Selection Recommendations

ALQ1F12 Considerations: The ALQ1F12 is an active product from Panasonic Electric Works with ROHS3 compliance, ensuring long-term supply availability. However, this substitute exhibits reduced electrical performance: contact current rating of 5A (versus 10A), maximum switching voltage of 30VDC (versus 100VDC), and maximum load capacity of 150W (versus 1000W). The ALQ1F12 is suitable only for applications where the original 10A contact rating is not required and switching loads remain below 150W. Extended operating temperature range is limited to -40°C ~ 85°C compared to the original -55°C ~ 125°C specification.

J107F1CS1212VDC.36 Considerations: The J107F1CS1212VDC.36 from CIT Relay and Switch is an active product with RoHS compliance and REACH unaffected status. This substitute exceeds the original part's contact current rating at 12A and provides superior switching voltage capability at 380VAC and 110VDC. The sealed fully design offers enhanced environmental protection. Operating temperature range extends to -55°C ~ 125°C, exceeding the original specification. Coil resistance matches the original at 400 Ohms, and operate/release times are comparable or faster. This substitute is suitable for direct replacement in applications requiring equivalent or higher electrical performance.

Both substitutes maintain the essential 12VDC SPDT through-hole configuration with PC pin termination, ensuring mechanical and electrical interface compatibility with the original JS1-F-12V-F design.

Frequently Asked Questions (FAQ)

Q: Can the ALQ1F12 be used as a direct replacement for the JS1-F-12V-F?

A: The ALQ1F12 shares the same coil voltage, contact form, mounting type, and termination style. However, it has reduced electrical performance with a 5A contact rating versus the original 10A, and maximum switching load of 150W versus 1000W. Use the ALQ1F12 only if your application does not require the full 10A contact rating and operates below 150W load capacity.

Q: Is the J107F1CS1212VDC.36 a suitable replacement?

A: Yes. The J107F1CS1212VDC.36 maintains all mandatory parameters: 12VDC coil, SPDT contact form, through-hole mounting, and PC pin termination. It exceeds the original specifications with 12A contact rating, 380VAC switching voltage, and extended operating temperature range of -55°C ~ 125°C. This substitute is suitable for direct replacement in equivalent or higher-performance applications.

Q: What are the key differences in contact material between substitutes?

A: The original JS1-F-12V-F and J107F1CS1212VDC.36 use Silver Tin Oxide (AgSnO) contact material. The ALQ1F12 uses Silver Nickel (AgNi). Both materials are suitable for general purpose switching; material selection does not affect mechanical compatibility.

Q: Do the substitutes have different packaging?

A: Yes. The ALQ1F12 is supplied in Box packaging, while the J107F1CS1212VDC.36 is supplied in Tube packaging. Packaging does not affect electrical or mechanical performance but may impact inventory handling and component placement procedures.

Q: What is the significance of the operating temperature range differences?

A: The original JS1-F-12V-F operates from -40°C to 105°C. The ALQ1F12 operates from -40°C to 85°C, which is more restrictive at the upper temperature limit. The J107F1CS1212VDC.36 operates from -55°C to 125°C, providing extended range capability. Select based on your application's thermal environment requirements.

Q: Are there compliance differences between the substitutes?

A: The original JS1-F-12V-F is RoHS Compliant. The ALQ1F12 is ROHS3 Compliant, representing a more recent compliance standard. The J107F1CS1212VDC.36 is RoHS Compliant with REACH Unaffected status. All three parts meet current regulatory requirements for their respective markets.