JS1-B-9V-F Equivalent & Substitute Parts

Part Overview

The JS1-B-9V-F is a general purpose relay manufactured by Panasonic Electric Works, featuring SPDT (1 Form C) contact configuration with 10A contact rating and 9VDC coil voltage. This through-hole mounted relay is designed for general switching applications requiring sealed, fully enclosed construction. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations where similar functionality is required.

Substiute Parts

JS1-B-9V-F

Panasonic Electric WorksIn Stock: 1070JS1-B-9V-F Datasheet

Current PartRFQ

ALQ109

Panasonic Electric WorksIn Stock: 2007ALQ109 Datasheet

SimilarRFQ

J107F1CS129VDC.36

CIT Relay and SwitchIn Stock: 2589J107F1CS129VDC.36 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the JS1-B-9V-F is determined by the following critical parameters:

Primary Compatibility Criteria:

• Coil voltage: 9VDC (exact match required)
• Contact form: SPDT (1 Form C) configuration
• Mounting type: Through Hole
• Termination style: PC Pin
• Coil type: Non Latching

Secondary Compatibility Criteria:

• Contact rating current: minimum 10A or higher
• Switching voltage: minimum 250VAC or 100VDC capability
• Operating temperature range: must encompass -40°C to 85°C
• Seal rating: fully sealed construction preferred for environmental protection

Two substitute parts meet these criteria with varying degrees of parameter alignment and product status considerations.

Parameter Comparison

Engineering Selection Recommendations

J107F1CS129VDC.36 (Preferred Substitute)

The J107F1CS129VDC.36 from CIT Relay and Switch is the primary recommended substitute. It maintains identical coil voltage (9VDC), contact form (SPDT), and coil current (40 mA) specifications. The contact rating of 12A exceeds the original 10A requirement, providing operational margin. Switching voltage capability (380VAC, 110VDC) surpasses the original specification. The part features fully sealed construction matching the original design. Operating temperature range extends to -55°C to 125°C, encompassing the original -40°C to 85°C requirement. RoHS compliance and identical coil resistance (225 Ohms) ensure direct functional compatibility. Active product status ensures long-term availability.

ALQ109 (Limited Substitute)

The ALQ109 from Panasonic Electric Works shares the same manufacturer lineage and maintains 9VDC coil voltage and SPDT contact configuration. However, the contact rating of 5A is insufficient for applications requiring the original 10A capacity. Switching voltage maximum of 30VDC is significantly reduced compared to the original 100VDC specification. The seal rating is not specified, whereas the original part features fully sealed construction. Active product status and ROHS3 compliance are advantages. This substitute is suitable only for applications with reduced current requirements below 5A.

Frequently Asked Questions (FAQ)

Q: Can ALQ109 directly replace JS1-B-9V-F in all applications?

A: No. The ALQ109 contact rating of 5A is insufficient for the original 10A specification. Use ALQ109 only in applications where load current does not exceed 5A. For applications requiring 10A or higher switching capacity, use J107F1CS129VDC.36.

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

A: J107F1CS129VDC.36 provides 12A contact rating and 380VAC/110VDC switching voltage capability, exceeding original specifications. ALQ109 provides only 5A contact rating and 250VAC/30VDC switching voltage, below original specifications. Both maintain 9VDC coil voltage and SPDT configuration.

Q: Is the J107F1CS129VDC.36 fully compatible with the original JS1-B-9V-F?

A: Yes, for functional compatibility. The J107F1CS129VDC.36 maintains all critical parameters: 9VDC coil voltage, SPDT contact form, through-hole mounting, PC pin termination, and fully sealed construction. The 12A contact rating and extended switching voltage provide enhanced capability. Coil resistance (225 Ohms) and coil current (40 mA) are identical.

Q: Does packaging affect substitution compatibility?

A: Packaging (Box for ALQ109, Tube for J107F1CS129VDC.36) does not affect electrical or mechanical compatibility. Packaging affects only handling, storage, and logistics. Select based on application requirements and inventory management practices.

Q: What is the impact of different contact materials?

A: JS1-B-9V-F and J107F1CS129VDC.36 use Silver Tin Oxide (AgSnO) contact material. ALQ109 uses Silver Nickel (AgNi). Both materials are suitable for general purpose switching. Contact material selection does not prevent substitution but may affect contact wear characteristics in specific applications.

Q: Are there temperature range considerations for substitution?

A: The original JS1-B-9V-F operates -40°C to 85°C. J107F1CS129VDC.36 extends this to -55°C to 125°C, providing wider operating range. ALQ109 matches the original -40°C to 85°C range. Both substitutes are compatible within the original temperature specification.