JS1F-F-12V-F Equivalent & Substitute Parts

Part Overview

The JS1F-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 standard switching applications requiring sealed, flux-protected operation. The product is currently obsolete, making identification of functionally equivalent alternatives essential for system maintenance, repair, and redesign applications.

Substiute Parts

JS1F-F-12V-F

Panasonic Electric WorksIn Stock: 1172JS1F-F-12V-F Datasheet

Current PartRFQ

ALQ1F12

Panasonic Electric WorksIn Stock: 1060ALQ1F12 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the JS1F-12V-F is determined by the following critical parameters:

• Coil Voltage: Must be 12VDC to maintain circuit compatibility
• Contact Form: Must be SPDT (1 Form C) to preserve switching topology
• Mounting Type: Must be Through Hole to ensure PCB compatibility
• Termination Style: Must be PC Pin for direct board connection
• Contact Rating: Minimum 10A required for load handling
• Switching Voltage: Must support at least 250VAC and 100VDC operation
• Operating Temperature: Must cover the -40°C to 105°C range or be suitable for the intended application environment

The ALQ1F12 meets the primary functional requirements of coil voltage, contact form, mounting type, and termination style. However, differences in contact rating, switching voltage capability, and operating temperature range represent design trade-offs that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The ALQ1F12 is an active product from the same manufacturer and represents a viable substitute for applications where the following conditions are met:

• Load current does not exceed 5A (reduced from 10A specification)
• DC switching voltage does not exceed 30VDC (reduced from 100VDC specification)
• Operating temperature requirements do not exceed 85°C (reduced from 105°C specification)
• Switching response time tolerance permits 20ms operation and release times (increased from 10ms specification)

The ALQ1F12 maintains full compliance with current RoHS3 standards and carries active product status, ensuring ongoing availability and supply chain support. The part is available in box packaging with 1004 units in stock.

For applications requiring the full 10A contact rating, 100VDC switching capability, or 105°C upper temperature limit, the ALQ1F12 does not provide equivalent performance and alternative solutions must be sourced.

Frequently Asked Questions (FAQ)

Q: Can the ALQ1F12 directly replace the JS1F-F-12V-F in all applications?

A: No. The ALQ1F12 has reduced contact rating (5A vs. 10A), lower maximum DC switching voltage (30VDC vs. 100VDC), and lower maximum operating temperature (85°C vs. 105°C). Substitution is valid only when application requirements fall within ALQ1F12 specifications.

Q: What is the primary difference in contact rating between these relays?

A: The JS1F-F-12V-F is rated for 10A continuous contact current, while the ALQ1F12 is rated for 5A. Applications exceeding 5A load current require the original part or an alternative with higher contact rating.

Q: Are the coil voltages identical?

A: Yes. Both relays operate on 12VDC coils, ensuring circuit compatibility in terms of drive voltage requirements.

Q: What is the impact of different switching voltage ratings?

A: The JS1F-F-12V-F supports DC switching up to 100VDC, while the ALQ1F12 supports only 30VDC. Applications switching higher DC voltages require the original specification or an alternative rated for the required voltage.

Q: Do both relays have the same mounting footprint?

A: Both are through-hole mounted with PC pin termination, ensuring mechanical and electrical compatibility with existing PCB designs.

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

A: The JS1F-F-12V-F operates to 105°C, while the ALQ1F12 operates to 85°C. Applications in high-temperature environments may require the original part or thermal management considerations for the substitute.

Q: How do the switching times compare?

A: The JS1F-F-12V-F operates and releases in 10ms, while the ALQ1F12 requires 20ms for both operations. Applications with timing-critical switching requirements may be affected by this difference.

Q: What packaging is available for the ALQ1F12?

A: The ALQ1F12 is supplied in box packaging, with 1004 units currently in stock.