JS1A-48V Equivalent & Substitute Parts

Part Overview

The JS1A-48V is a general purpose relay manufactured by Panasonic Electric Works, featuring a SPST-NO (1 Form A) contact configuration with a 48VDC coil. This through-hole mounted relay is rated for 10A switching capacity and is designed for applications requiring reliable electromechanical switching at 48VDC. The product is currently obsolete, making identification of compatible substitute parts essential for system maintenance and component sourcing.

Substiute Parts

JS1A-48V

Panasonic Electric WorksIn Stock: 994JS1A-48V Datasheet

Current PartRFQ

J1071AS48VDC.36

CIT Relay and SwitchIn Stock: 2899J1071AS48VDC.36 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the JS1A-48V is determined by the following critical parameters that must remain consistent:

• Coil Voltage: 48VDC (exact match required)
• Contact Form: SPST-NO (1 Form A) configuration
• Mounting Type: Through Hole with PC Pin termination
• Coil Current: 7.5 mA (matching drive circuit requirements)
• Coil Resistance: 6.4 kOhms (ensuring circuit compatibility)

The J1071AS48VDC.36 manufactured by CIT Relay and Switch meets these core substitution criteria. While the substitute part offers higher contact current rating (15A vs 10A) and extended operating temperature range, these represent improvements that do not compromise backward compatibility in applications designed for the original JS1A-48V.

Parameter Comparison

Engineering Selection Recommendations

The J1071AS48VDC.36 is a direct functional substitute for the JS1A-48V based on matching coil voltage, contact configuration, coil current, and coil resistance. The substitute part is currently in active production status with 2820 units available in inventory, addressing the obsolescence of the original component.

The J1071AS48VDC.36 carries ROHS3 compliance certification, whereas the original JS1A-48V status is not specified. Both parts maintain REACH Unaffected status and EAR99 ECCN classification. The substitute part's higher contact current rating (15A) and extended operating temperature range (-40°C ~ 125°C) provide operational margin beyond the original specification without introducing compatibility issues in existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the J1071AS48VDC.36 directly replace the JS1A-48V in existing applications?

A: Yes. Both relays share identical coil voltage (48VDC), coil current (7.5 mA), coil resistance (6.4 kOhms), contact form (SPST-NO), and switching timing (10 ms operate/release). The substitute part's higher current rating and extended temperature range do not affect backward compatibility.

Q: What is the difference in switching voltage ratings between these parts?

A: The JS1A-48V supports 250VAC and 100VDC maximum switching voltage, while the J1071AS48VDC.36 supports 125VAC and 30VDC maximum. Applications operating within the J1071AS48VDC.36 limits will function identically. Applications requiring the higher switching voltage capability of the original part require verification against the substitute's lower rating.

Q: Are there packaging differences between these relays?

A: The JS1A-48V uses standard packaging, while the J1071AS48VDC.36 is supplied in box packaging. Both employ identical through-hole PC pin termination suitable for PCB mounting.

Q: Why is the JS1A-48V obsolete?

A: The JS1A-48V has been discontinued by Panasonic Electric Works. The J1071AS48VDC.36 remains in active production and provides equivalent functionality for new designs and component replacement applications.