JS1A-B-5V Equivalent & Substitute Parts

Part Overview

The JS1A-B-5V is a general purpose relay manufactured by Panasonic Electric Works, configured as a SPST-NO (1 Form A) with a 5VDC coil and 10A contact rating. This through-hole mounted relay is designed for general switching applications requiring sealed, fully enclosed construction with silver alloy contacts.

The JS1A-B-5V is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades where this relay is specified.

Substiute Parts

JS1A-B-5V

Panasonic Electric WorksIn Stock: 1070JS1A-B-5V Datasheet

Current PartRFQ

J1071AS5VDC.36

CIT Relay and SwitchIn Stock: 2509J1071AS5VDC.36 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the JS1A-B-5V is determined by the following critical parameters:

• Coil voltage must be 5VDC
• Contact form must be SPST-NO (1 Form A)
• Mounting type must be through hole with PC pin termination
• Seal rating must be fully sealed
• Coil type must be non-latching
• Coil current and resistance must be compatible with existing circuit design

The J1071AS5VDC.36 manufactured by CIT Relay and Switch meets these core substitution criteria. While the substitute part offers a higher contact rating (15A versus 10A), this represents an upward-compatible specification that does not compromise circuit functionality. The coil voltage, contact form, mounting configuration, and sealing characteristics are equivalent.

Parameter Comparison

Engineering Selection Recommendations

The J1071AS5VDC.36 is classified as active product status, ensuring ongoing availability and manufacturing support. This substitute part carries RoHS3 compliance certification, providing environmental regulatory alignment for new designs and production environments with stricter compliance requirements.

The substitute part maintains electrical compatibility with the original JS1A-B-5V specification across all critical parameters: coil voltage, contact form, coil current, and timing characteristics. The higher contact rating of 15A provides additional margin for applications where the original 10A specification was marginal.

Selection between these parts should be based on product availability requirements and compliance certification needs for the target application environment.

Frequently Asked Questions (FAQ)

Q: Can the J1071AS5VDC.36 be used as a direct replacement for the JS1A-B-5V in existing designs?

A: Yes. Both relays share identical coil voltage (5VDC), contact form (SPST-NO), mounting configuration (through hole with PC pins), and sealing characteristics (fully sealed). Coil current and resistance are within compatible tolerances. The substitute part's higher contact rating (15A) does not create compatibility issues in circuits designed for the original 10A specification.

Q: What are the differences in operating temperature range?

A: The JS1A-B-5V operates from -40°C to 85°C. The J1071AS5VDC.36 operates from -40°C to 125°C. The substitute part provides extended high-temperature capability, which is beneficial for applications in elevated ambient conditions but not required for designs within the original temperature range.

Q: Are there differences in contact material?

A: Yes. The JS1A-B-5V uses silver alloy contacts, while the J1071AS5VDC.36 uses silver tin oxide (AgSnO) contacts. Both materials are suitable for general purpose switching applications. Contact material selection does not affect substitution compatibility for standard switching loads.

Q: What is the significance of the RoHS3 compliance on the substitute part?

A: RoHS3 compliance indicates the substitute part meets current environmental and hazardous substance restrictions. This is relevant for new production designs and markets with mandatory RoHS compliance requirements. The original JS1A-B-5V does not carry this certification.

Q: Are the coil resistance values close enough for circuit compatibility?

A: Yes. The JS1A-B-5V has 69.4 Ohms coil resistance, and the J1071AS5VDC.36 has 69 Ohms. This 0.4 Ohm difference is negligible and does not affect circuit operation or coil current draw in practical applications.