JS1-B-12V Equivalent & Substitute Parts

Part Overview

The JS1-B-12V is a general purpose relay manufactured by Panasonic Electric Works, featuring a Single Pole Double Throw (SPDT) contact configuration with a 12VDC coil. This through-hole mounted relay is rated for 10A switching capacity and is designed for sealed, fully enclosed operation across industrial and commercial applications. The product is currently obsolete, making identification of compatible substitute parts essential for system maintenance, repair, and redesign efforts.

Substiute Parts

JS1-B-12V

Panasonic Electric WorksIn Stock: 1077JS1-B-12V Datasheet

Current PartRFQ

J1071CS12VDC.36

CIT Relay and SwitchIn Stock: 2681J1071CS12VDC.36 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the JS1-B-12V is determined by the following critical parameters:

• Coil Voltage: Must be 12VDC to maintain circuit compatibility
• Contact Form: Must be SPDT (1 Form C) for identical switching functionality
• Coil Current: Must be 30 mA to ensure proper control circuit operation
• Mounting Type: Must be Through Hole for PCB compatibility
• Termination Style: Must be PC Pin for direct board connection
• Coil Resistance: Must be 400 Ohms for circuit design consistency

The J1071CS12VDC.36 manufactured by CIT Relay and Switch meets all critical substitution criteria. While this substitute provides enhanced electrical ratings (15A contact current versus 10A, and extended temperature range to 125°C), it maintains full compatibility with the original design parameters and control circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

The J1071CS12VDC.36 is a direct functional substitute for the JS1-B-12V. The substitute part is currently in active production status, ensuring long-term availability and supply chain continuity. Both relays share identical coil specifications (12VDC, 30 mA, 400 Ohms) and control circuit requirements, enabling drop-in replacement without circuit modification.

The J1071CS12VDC.36 provides superior electrical performance characteristics, including higher contact current rating (15A versus 10A) and extended operating temperature range (-40°C to 125°C versus -40°C to 85°C). The substitute meets ROHS3 compliance requirements, whereas the original part status does not specify RoHS compliance. Both parts maintain REACH Unaffected status and EAR99 export classification.

For applications operating within the original JS1-B-12V specifications, the J1071CS12VDC.36 offers enhanced reliability margins and extended service life potential due to improved thermal performance and higher contact capacity ratings.

Frequently Asked Questions (FAQ)

Q: Can the J1071CS12VDC.36 be used as a direct replacement for the JS1-B-12V?

A: Yes. Both relays share identical coil voltage (12VDC), coil current (30 mA), contact form (SPDT), mounting type (through hole), and termination style (PC pin). The substitute requires no circuit modifications for installation.

Q: What are the differences in electrical ratings between these two relays?

A: The J1071CS12VDC.36 provides higher contact current capacity (15A versus 10A) and supports a wider operating temperature range (-40°C to 125°C versus -40°C to 85°C). The switching voltage specifications differ: the original supports 250VAC/100VDC maximum, while the substitute supports 125VAC/30VDC maximum. Application requirements determine which rating is appropriate.

Q: Are there packaging differences between these parts?

A: The JS1-B-12V is supplied with standard packaging, while the J1071CS12VDC.36 is supplied in box packaging. Both use identical through-hole PC pin termination for PCB mounting.

Q: What compliance certifications apply to the substitute part?

A: The J1071CS12VDC.36 is ROHS3 compliant and carries cURus approval agency certification. Both the original and substitute maintain REACH Unaffected status and EAR99 export classification.

Q: Is the contact material difference significant for substitution?

A: The original uses silver alloy contacts, while the substitute uses silver tin oxide (AgSnO) contacts. Both materials are suitable for general purpose relay applications. The contact material difference does not prevent substitution within the specified electrical parameters.