Equivalent & Substitute Parts for JS1-48V-F

Part Overview

The JS1-48V-F is a general purpose relay manufactured by Panasonic Electric Works, featuring a Single Pole Double Throw (SPDT) contact configuration with a 48VDC coil and 10A contact rating. This through-hole mounted relay is designed for general switching applications requiring sealed, fully enclosed construction.

The JS1-48V-F has reached obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this relay.

Substiute Parts

JS1-48V-F

Panasonic Electric WorksIn Stock: 1179JS1-48V-F Datasheet

Current PartRFQ

ALQ148

Panasonic Electric WorksIn Stock: 884ALQ148 Datasheet

SimilarRFQ

J107F1CS1248VDC.36

CIT Relay and SwitchIn Stock: 2564J107F1CS1248VDC.36 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the JS1-48V-F is determined by the following critical parameters:

• Coil Voltage: Must be 48VDC to ensure direct compatibility with existing circuit designs
• Contact Form: Must be SPDT (1 Form C) to maintain switching functionality
• Mounting Type: Must be Through Hole to ensure PCB compatibility
• Termination Style: Must be PC Pin for direct socket or PCB pad connection
• RoHS Compliance: Must maintain RoHS compliance status for regulatory consistency

Two substitute parts meet these core criteria with varying degrees of parameter alignment:

ALQ148 (Panasonic Electric Works): Matches all critical parameters but features reduced contact current rating (5A vs. 10A) and lower switching voltage specifications.

J107F1CS1248VDC.36 (CIT Relay and Switch): Matches all critical parameters with enhanced contact current rating (12A vs. 10A) and extended operating temperature range (-55°C ~ 125°C vs. -40°C ~ 70°C).

Parameter Comparison

Engineering Selection Recommendations

J107F1CS1248VDC.36 is the preferred substitute for the obsolete JS1-48V-F. This part maintains identical coil voltage, contact form, and termination specifications while providing enhanced performance characteristics. The 12A contact rating exceeds the original 10A specification, offering design margin for current-carrying capacity. The extended operating temperature range (-55°C ~ 125°C) provides broader environmental compatibility. Both parts feature sealed construction and identical coil current (7.5 mA) and coil resistance (6.4 kOhms). The part is currently in active production status with substantial inventory availability (2472 pcs).

ALQ148 is a secondary substitute option when current rating reduction is acceptable for the application. This part maintains the same manufacturer (Panasonic Electric Works) as the original component and offers active product status. However, the reduced contact current rating (5A) and lower maximum switching voltage (30VDC) limit its applicability to lower-power switching scenarios. The contact material differs (Silver Nickel vs. Silver Tin Oxide), which may affect long-term reliability in specific switching environments.

Frequently Asked Questions (FAQ)

Q: Can ALQ148 be used as a direct replacement for JS1-48V-F?

A: ALQ148 is electrically compatible at the coil level (48VDC, SPDT, Through Hole, PC Pin termination) but has reduced contact current capacity (5A vs. 10A). Use ALQ148 only if your application requires switching currents of 5A or less. For applications requiring the full 10A rating, J107F1CS1248VDC.36 is required.

Q: What are the key differences between the two substitute parts?

A: J107F1CS1248VDC.36 provides higher contact current (12A), extended temperature range (-55°C ~ 125°C), and higher switching voltage capability (380VAC, 110VDC). ALQ148 offers lower coil resistance (5.76 kOhms) and extended upper temperature limit (85°C) but reduced current and voltage ratings. Both maintain 48VDC coil voltage and SPDT contact configuration.

Q: Are packaging differences significant for PCB assembly?

A: Both substitute parts use PC Pin termination for through-hole mounting, ensuring mechanical compatibility with existing PCB designs. ALQ148 is supplied in Box packaging while J107F1CS1248VDC.36 is supplied in Tube packaging. Packaging format does not affect electrical or mechanical performance.

Q: Do both substitutes maintain the sealed construction of the original part?

A: J107F1CS1248VDC.36 maintains sealed, fully enclosed construction identical to JS1-48V-F. ALQ148 seal rating is not specified in available documentation. For applications requiring sealed relay construction, J107F1CS1248VDC.36 is the confirmed option.

Q: Are there compliance or certification differences?

A: All three parts (JS1-48V-F, ALQ148, J107F1CS1248VDC.36) are RoHS Compliant. J107F1CS1248VDC.36 carries REACH Unaffected status. ALQ148 lists CQC, cURuus, and VDE approvals. Both substitutes meet regulatory requirements for RoHS-compliant applications.