JS1F-B-6V-F Equivalent & Substitute Parts

Part Overview

The JS1F-B-6V-F is a general purpose relay manufactured by Panasonic Electric Works, featuring a Single Pole Double Throw (SPDT) contact configuration with a 6VDC coil and 10A contact rating. This through-hole mounted relay is designed for general switching applications requiring sealed flux protection and Class B coil insulation. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and new design implementations where legacy component replacement is required.

Substiute Parts

JS1F-B-6V-F

Panasonic Electric WorksIn Stock: 870JS1F-B-6V-F Datasheet

Current PartRFQ

ALQ106

Panasonic Electric WorksIn Stock: 2060ALQ106 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the JS1F-B-6V-F is determined by the following critical parameters:

• Coil Voltage: Must be 6VDC to ensure direct compatibility with existing circuit designs
• Contact Form: Must be SPDT (1 Form C) to maintain switching functionality
• Mounting Type: Must be Through Hole to ensure PCB compatibility
• Termination Style: Must be PC Pin for direct socket or PCB pad connection
• Operating Temperature Range: Must support -40°C ~ 85°C minimum
• Contact Rating: Minimum 10A required for equivalent current-switching capability
• Coil Type: Must be Non Latching for identical operational behavior

The ALQ106 meets the core substitution criteria for coil voltage, contact form, mounting type, termination style, and operating temperature range. However, the contact rating differs at 5A versus the original 10A specification, which represents a functional limitation in maximum switchable current.

Parameter Comparison

Engineering Selection Recommendations

The ALQ106 is an active product from Panasonic Electric Works with ROHS3 compliance, providing improved regulatory status compared to the obsolete JS1F-B-6V-F. Both relays share identical coil voltage, contact form, mounting configuration, and operating temperature specifications.

Selection of the ALQ106 as a substitute requires evaluation of application current requirements. The ALQ106 contact rating of 5A is half that of the original JS1F-B-6V-F at 10A. Applications operating at or below 5A continuous current are directly compatible. Applications requiring current switching above 5A cannot use the ALQ106 without circuit redesign or parallel relay configuration.

The ALQ106 exhibits longer switching times (20ms operate and release versus 10ms for the original), which may impact applications with strict timing requirements. The higher must-operate voltage (4.5VDC versus 4.2VDC) and lower must-release voltage (0.3VDC versus 0.6VDC) represent minor operational differences within typical circuit tolerance margins.

Frequently Asked Questions (FAQ)

Q: Can the ALQ106 directly replace the JS1F-B-6V-F in all applications?

A: Direct replacement is possible only in applications where the load current does not exceed 5A. The ALQ106 contact rating is 5A compared to the original 10A specification. Applications requiring 10A switching capability require alternative solutions or circuit modification.

Q: What are the key differences between these relays?

A: The primary differences are contact rating (10A versus 5A), switching time (10ms versus 20ms), and contact material composition (Silver Tin Oxide versus Silver Nickel). Both maintain identical coil voltage, contact form, and mounting specifications.

Q: Are there packaging differences between JS1F-B-6V-F and ALQ106?

A: The JS1F-B-6V-F uses standard packaging, while the ALQ106 is supplied in box packaging. Both use identical through-hole PC pin termination suitable for standard PCB mounting.

Q: Does the ALQ106 meet current compliance requirements?

A: Yes. The ALQ106 is ROHS3 compliant and REACH unaffected, providing current regulatory compliance. The original JS1F-B-6V-F is RoHS compliant but obsolete.

Q: How do the switching times affect circuit performance?

A: The ALQ106 operates and releases in 20ms compared to 10ms for the original. This 10ms difference is significant only in applications with switching frequency above 50Hz or timing-critical control sequences. Standard industrial switching applications typically tolerate this difference.

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

A: The ALQ106 coil resistance is 90 Ohms versus 100 Ohms for the original. This 10% difference results in slightly higher coil current (66.7mA versus 60mA) and requires verification that the driving circuit can supply the additional current without exceeding design limits.