JS1-9V General Purpose Relay SPDT 9VDC Equivalent & Substitute Parts

Part Overview

The JS1-9V is a general purpose relay manufactured by Panasonic Electric Works, featuring a Single Pole Double Throw (SPDT) contact configuration with a 9VDC coil. This through-hole mounted relay is designed for applications requiring 10A contact switching capability at 250VAC or 100VDC maximum switching voltage. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing maintenance, repair, and legacy system support.

Substiute Parts

JS1-9V

Panasonic Electric WorksIn Stock: 2311JS1-9V Datasheet

Current PartRFQ

J1071CS9VDC.36

CIT Relay and SwitchIn Stock: 894J1071CS9VDC.36 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The J1071CS9VDC.36 from CIT Relay and Switch qualifies as a substitute for the JS1-9V based on the following critical parameters:

Matching Parameters:

• Coil Voltage: 9VDC (identical)
• Contact Form: SPDT (1 Form C) (identical)
• Coil Current: 40 mA (identical)
• Coil Resistance: 225 Ohms (identical)
• Mounting Type: Through Hole (identical)
• Termination Style: PC Pin (identical)
• Seal Rating: Sealed - Fully (identical)
• Operate Time: 10 ms (identical)
• Release Time: 10 ms (identical)
• Must Operate Voltage: 6.3 VDC / 6.75 VDC (compatible range)
• Must Release Voltage: 0.9 VDC (identical)

Enhanced Specifications:

• Contact Rating: 15A (exceeds 10A requirement)
• Switching Voltage: 125VAC, 30VDC (lower than original but suitable for most applications)
• Operating Temperature: -40°C ~ 125°C (extended upper range)
• Product Status: Active (currently available)

Parameter Comparison

Engineering Selection Recommendations

The J1071CS9VDC.36 is suitable as a substitute for the obsolete JS1-9V in applications where the following conditions are met:

Compliance and Certification:

• J1071CS9VDC.36 holds cURus approval and is RoHS3 compliant, providing regulatory compliance for modern applications
• Both parts are REACH unaffected and classified as EAR99

Application Suitability:

• The substitute part maintains identical coil voltage, contact form, coil current, and timing characteristics
• The 15A contact rating provides margin above the original 10A specification
• The extended operating temperature range (-40°C ~ 125°C) accommodates broader environmental conditions
• Switching voltage specification (125VAC, 30VDC) is lower than the original; verify application requirements do not exceed these limits

Availability:

• The J1071CS9VDC.36 is currently in active production with 853 units in stock, ensuring supply continuity for the obsolete JS1-9V

Frequently Asked Questions (FAQ)

Q: Can the J1071CS9VDC.36 directly replace the JS1-9V in existing circuits?

A: Yes, for applications operating within 125VAC or 30VDC switching limits. The identical coil voltage (9VDC), coil current (40 mA), contact form (SPDT), and timing characteristics (10 ms operate/release) ensure functional compatibility. Verify your application's switching voltage does not exceed the J1071CS9VDC.36 maximum ratings.

Q: What is the difference in contact material between these relays?

A: The JS1-9V uses Silver Alloy contacts, while the J1071CS9VDC.36 uses Silver Tin Oxide (AgSnO). Both are sealed, fully rated contacts suitable for general purpose switching applications. Silver Tin Oxide provides enhanced erosion resistance in certain switching scenarios.

Q: Does the higher current rating (15A vs 10A) affect circuit design?

A: No. The 15A rating of the J1071CS9VDC.36 is a capability specification. Your circuit will operate at the same current levels as designed for the original 10A relay. The higher rating provides additional safety margin.

Q: Are there packaging differences between these parts?

A: The JS1-9V uses standard packaging, while the J1071CS9VDC.36 is supplied in a Box. Both maintain identical through-hole PC pin termination and physical form factor for PCB mounting.

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

A: The J1071CS9VDC.36 operates from -40°C to 125°C, compared to the JS1-9V range of -40°C to 70°C. This extended upper temperature limit provides greater flexibility for applications in elevated ambient conditions or thermal environments.

Q: Are there regulatory compliance considerations for substitution?

A: The J1071CS9VDC.36 is RoHS3 compliant and cURus approved, meeting modern regulatory requirements. Both parts are REACH unaffected. Verify your application's compliance requirements before substitution.