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

Part Overview

The JS1-B-12V-F is a general purpose relay manufactured by Panasonic Electric Works, featuring SPDT (1 Form C) contact configuration with 12VDC coil voltage and 10A contact rating. This through-hole mounted relay is designed for general switching applications with sealed construction and Class B coil insulation. The product is currently obsolete, making identification of functionally equivalent alternatives essential for design continuity and procurement planning.

Substiute Parts

JS1-B-12V-F

Panasonic Electric WorksIn Stock: 78667JS1-B-12V-F Datasheet

Current PartRFQ

ALQ112

Panasonic Electric WorksIn Stock: 10202ALQ112 Datasheet

SimilarRFQ

J107F1CS1212VDC.36

CIT Relay and SwitchIn Stock: 97896J107F1CS1212VDC.36 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the JS1-B-12V-F is determined by the following critical parameters:

• Coil Voltage: Must be 12VDC 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 board connection
• Coil Type: Must be Non Latching for equivalent operational behavior
• Contact Rating (Current): Minimum 10A required; higher ratings are acceptable for derating applications
• Switching Voltage: Must support at least 250VAC and 100VDC maximum ratings
• Operating Temperature: Must encompass or exceed -40°C ~ 85°C range
• RoHS Compliance: Must maintain RoHS compliance status for regulatory alignment

Two substitute parts meet these criteria with varying degrees of parameter alignment.

Parameter Comparison

Engineering Selection Recommendations

J107F1CS1212VDC.36 is the primary substitute for the JS1-B-12V-F. This CIT Relay and Switch component maintains full parameter alignment across all critical specifications: identical coil voltage, contact form, mounting type, termination style, and coil current. The contact rating of 12A exceeds the original 10A specification, providing operational margin. The switching voltage capability (380VAC, 110VDC) surpasses the original (250VAC, 100VDC), and the extended operating temperature range (-55°C ~ 125°C) provides enhanced thermal performance. Both parts share identical contact material (Silver Tin Oxide) and coil resistance (400 Ohms). The J107F1CS1212VDC.36 maintains RoHS compliance and carries active product status with full sealed construction.

ALQ112 is a secondary substitute from Panasonic Electric Works. While it maintains the same manufacturer lineage and meets core substitution criteria (12VDC coil, SPDT form, through-hole mounting, PC pin termination), it presents a significant limitation: the contact rating is 5A, which is 50% below the original 10A specification. This reduction in current capacity restricts its application scope to lower-power switching scenarios. The maximum switching voltage for DC is also reduced to 30VDC compared to the original 100VDC. The ALQ112 is suitable only for applications where the 5A contact rating is sufficient and DC switching does not exceed 30V. The coil current is marginally higher at 33.3mA versus 30mA, and the contact material differs (Silver Nickel versus Silver Tin Oxide).

For applications requiring full parameter compatibility with the original JS1-B-12V-F, J107F1CS1212VDC.36 is the recommended selection.

Frequently Asked Questions (FAQ)

Q: Can ALQ112 be used as a direct replacement for JS1-B-12V-F?

A: ALQ112 is not a direct replacement due to reduced contact rating (5A versus 10A) and lower maximum DC switching voltage (30VDC versus 100VDC). Use ALQ112 only if your application operates within these reduced parameters.

Q: What are the key differences between J107F1CS1212VDC.36 and the original JS1-B-12V-F?

A: J107F1CS1212VDC.36 maintains all critical parameters with improvements: higher contact rating (12A versus 10A), higher switching voltage capability (380VAC/110VDC versus 250VAC/100VDC), extended temperature range (-55°C to 125°C versus -40°C to 85°C), and Class F coil insulation versus Class B. The manufacturer differs (CIT Relay and Switch versus Panasonic Electric Works).

Q: Are both substitute parts RoHS compliant?

A: Yes. J107F1CS1212VDC.36 is RoHS Compliant, and ALQ112 is ROHS3 Compliant. Both meet regulatory requirements for RoHS compliance.

Q: What is the impact of different contact materials on relay performance?

A: The original JS1-B-12V-F and J107F1CS1212VDC.36 both use Silver Tin Oxide (AgSnO) contact material, ensuring consistent switching characteristics. ALQ112 uses Silver Nickel (AgNi), which may exhibit different contact resistance and wear characteristics over the relay's operational life.

Q: Can I use J107F1CS1212VDC.36 in applications requiring the full -40°C to 85°C temperature range?

A: Yes. J107F1CS1212VDC.36 operates across -55°C to 125°C, which fully encompasses the original -40°C to 85°C range and extends capability to more extreme temperatures.

Q: What packaging formats are available for the substitute parts?

A: J107F1CS1212VDC.36 is supplied in Tube packaging. ALQ112 is supplied in Box packaging. Verify packaging compatibility with your procurement and assembly processes.

Q: Are the coil resistance values compatible between the main part and substitutes?

A: The JS1-B-12V-F and J107F1CS1212VDC.36 both have 400 Ohm coil resistance, ensuring identical coil current draw at 12VDC (30mA). ALQ112 has 360 Ohm resistance, resulting in slightly higher coil current (33.3mA). This difference is minor but should be verified against circuit design margins.