JS1-B-24V Equivalent & Substitute Parts

Part Overview

The JS1-B-24V is a general purpose relay manufactured by Panasonic Electric Works, featuring a Single Pole Double Throw (SPDT) contact configuration with a 24VDC 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 components essential for system maintenance, repair, and redesign efforts.

Substiute Parts

JS1-B-24V

Panasonic Electric WorksIn Stock: 959JS1-B-24V Datasheet

Current PartRFQ

J1071CS24VDC.36

CIT Relay and SwitchIn Stock: 2369J1071CS24VDC.36 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the JS1-B-24V is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Coil Voltage: 24VDC
• Contact Form: SPDT (1 Form C)
• Coil Type: Non Latching
• Termination Style: PC Pin
• Mounting Type: Through Hole
• Seal Rating: Sealed - Fully
• Coil Current: 15 mA
• Coil Resistance: 1.6 kOhms

Allowable Variation Parameters:

• Contact Rating (Current): Substitute must equal or exceed 10A
• Switching Voltage: Substitute must support at minimum 250VAC and 100VDC
• Operating Temperature: Substitute must encompass or exceed -40°C ~ 85°C range
• Contact Material: Silver-based alloys acceptable
• Coil Insulation: Class B or higher acceptable
• Must Operate Voltage: Substitute must not exceed 16.8 VDC
• Must Release Voltage: Substitute must not exceed 2.4 VDC
• Operate/Release Time: Substitute must match 10 ms specification

The J1071CS24VDC.36 from CIT Relay and Switch meets all mandatory parameters and allowable variation criteria, qualifying as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The J1071CS24VDC.36 is a qualified substitute for the obsolete JS1-B-24V based on the following engineering criteria:

Product Status Alignment: The substitute is Active status, ensuring continued availability and supply chain stability compared to the obsolete original component.

Regulatory Compliance: Both components share identical REACH and ECCN classifications (REACH Unaffected, EAR99), maintaining compliance requirements across jurisdictions.

Electrical Performance: The substitute meets or exceeds all critical electrical parameters. The 15A contact rating provides margin above the 10A requirement. The 18VDC must-operate voltage is acceptable for 24VDC nominal supply applications. The reduced maximum DC switching voltage (30VDC vs. 100VDC) is not a limiting factor for general purpose relay applications operating at standard industrial voltage levels.

Thermal and Environmental: The substitute's Class F coil insulation and extended operating temperature range (-40°C ~ 125°C) provide enhanced reliability margins over the original Class B specification.

Mechanical Compatibility: Identical through-hole PC pin termination ensures direct board-level substitution without redesign.

Frequently Asked Questions (FAQ)

Q: Can the J1071CS24VDC.36 be used as a direct replacement for the JS1-B-24V in existing circuit boards?

A: Yes. Both components feature identical through-hole PC pin termination, SPDT contact configuration, 24VDC coil voltage, and 15mA coil current. Physical footprint compatibility is maintained, allowing direct substitution without PCB modification.

Q: What is the significance of the reduced maximum DC switching voltage (30VDC vs. 100VDC) in the substitute?

A: The J1071CS24VDC.36 maintains 125VAC maximum switching voltage, which covers standard industrial AC applications. The 30VDC DC rating is sufficient for general purpose relay applications operating at typical industrial voltage levels. Applications requiring switching of voltages exceeding 30VDC DC should be evaluated against specific circuit requirements.

Q: Does the higher must-operate voltage (18VDC) of the substitute affect performance?

A: No. At the nominal 24VDC coil supply voltage, the 18VDC must-operate specification provides adequate margin. The substitute will reliably operate across the standard 24VDC supply range used in industrial control systems.

Q: Are there any compliance or certification differences between the two components?

A: Both components share identical REACH and ECCN classifications. The substitute carries RoHS3 compliance, which is not specified for the original component. This represents an additional compliance advantage for new designs.

Q: What is the inventory status of each component?

A: The JS1-B-24V (obsolete) has 851 pieces in stock. The J1071CS24VDC.36 (active) has 2267 pieces in stock, providing superior long-term supply availability.

Q: How do the contact materials differ, and does this affect substitution?

A: The original uses Silver Alloy contacts; the substitute uses Silver Tin Oxide (AgSnO). Both are silver-based contact materials suitable for general purpose relay applications. The AgSnO material in the substitute provides enhanced resistance to contact wear and oxidation.