JS1-B-18V Equivalent & Substitute Parts

Part Overview

The JS1-B-18V is a general purpose relay manufactured by Panasonic Electric Works, featuring SPDT (1 Form C) contact configuration with 18VDC coil voltage and 10A contact rating. This through-hole mounted relay is designed for applications requiring reliable switching of AC and DC loads. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing system maintenance and new design implementations.

Substiute Parts

JS1-B-18V

Panasonic Electric WorksIn Stock: 1241JS1-B-18V Datasheet

Current PartRFQ

J1071CS18VDC.36

CIT Relay and SwitchIn Stock: 3038J1071CS18VDC.36 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the JS1-B-18V are identified based on the following critical parameters that must align for functional equivalence:

• Coil voltage: 18VDC (exact match required)
• Contact form: SPDT (1 Form C) configuration
• Coil current: 20 mA (matching drive requirements)
• Mounting type: Through hole
• Termination style: PC pin
• Coil type: Non-latching

The J1071CS18VDC.36 meets these core substitution criteria. Variations in contact rating (15A vs. 10A), switching voltage capability, operating temperature range, and contact material represent acceptable parameter differences for substitute qualification, as these reflect enhanced or equivalent performance characteristics within the relay category.

Parameter Comparison

Engineering Selection Recommendations

The J1071CS18VDC.36 is a qualified substitute for the obsolete JS1-B-18V based on matching core electrical and mechanical parameters. The substitute part is currently in active production status, ensuring availability for new designs and replacement applications.

Key considerations for selection:

• The J1071CS18VDC.36 provides higher contact current rating (15A vs. 10A), offering increased switching capacity for the same coil voltage and contact configuration.
• The substitute part operates across an extended temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C), providing broader environmental compatibility.
• Both parts share identical coil current (20 mA), coil resistance (900 Ohms), and switching timing (10 ms operate/release), ensuring compatible circuit integration.
• The J1071CS18VDC.36 is RoHS3 compliant, meeting current regulatory requirements for electronic component procurement.
• Packaging format differs (box vs. standard), which may affect inventory and assembly processes but does not impact functional performance.

Frequently Asked Questions (FAQ)

Q: Can the J1071CS18VDC.36 directly replace the JS1-B-18V in existing circuits?

A: Yes. Both relays share the same 18VDC coil voltage, SPDT contact configuration, 20 mA coil current, and PC pin termination. The substitute part's higher current rating and extended temperature range do not create compatibility issues in applications designed for the original part.

Q: What is the significance of the higher 15A contact rating on the substitute part?

A: The J1071CS18VDC.36 can switch higher load currents (15A vs. 10A) while maintaining the same contact form and coil specifications. This represents enhanced performance capability and does not restrict use in applications requiring 10A or lower switching current.

Q: How do the switching voltage specifications differ between these parts?

A: The JS1-B-18V supports 250VAC and 100VDC maximum switching voltage, while the J1071CS18VDC.36 supports 125VAC and 30VDC maximum. Application circuits must operate within the substitute part's voltage limits. If the original design requires the higher switching voltage capability of the JS1-B-18V, the J1071CS18VDC.36 may not be suitable.

Q: Are there differences in coil drive requirements?

A: No. Both parts require identical 20 mA coil current at 18VDC, with 900 Ohm coil resistance. Existing drive circuits require no modification.

Q: What is the impact of the extended operating temperature range on the substitute part?

A: The J1071CS18VDC.36 operates reliably from -40°C to 125°C, compared to -40°C to 85°C for the original part. This provides additional margin for applications in elevated temperature environments and does not restrict use in standard temperature ranges.

Q: Does the RoHS3 compliance of the substitute part affect compatibility?

A: RoHS3 compliance indicates the substitute part meets current environmental and material restriction standards. This is a regulatory advantage for new designs and does not impact electrical or mechanical compatibility with the original part specification.

Q: How should packaging differences be handled in procurement?

A: The J1071CS18VDC.36 is supplied in box packaging, while the original part used standard packaging. Verify that box packaging is compatible with existing assembly and storage procedures before procurement.