JS1AF-F-48V-F General Purpose Relay Equivalent & Substitute Parts

Part Overview

The JS1AF-F-48V-F is a general purpose relay manufactured by Panasonic Electric Works, configured as a SPST-NO (1 Form A) with a 48VDC coil and 10A contact rating. This through-hole mounted relay is designed for general switching applications requiring sealed, flux-protected construction with Class F coil insulation.

The JS1AF-F-48V-F is classified as obsolete. 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 configuration.

Substiute Parts

JS1AF-F-48V-F

Panasonic Electric WorksIn Stock: 1111JS1AF-F-48V-F Datasheet

Current PartRFQ

ALQ3F48

Panasonic Electric WorksIn Stock: 1008ALQ3F48 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the JS1AF-F-48V-F is evaluated based on the following critical parameters that define functional equivalence:

Primary Matching Criteria:

• Coil voltage: 48VDC (exact match required)
• Contact form: SPST-NO (1 Form A) (exact match required)
• Mounting type: Through Hole (exact match required)
• Termination style: PC Pin (exact match required)

Secondary Compatibility Criteria:

• Contact rating current: Minimum 10A required for direct substitution
• Switching voltage: Must support 250VAC and 100VDC minimum
• Operating temperature range: Must encompass -40°C to 105°C
• Coil insulation: Class F or equivalent
• RoHS compliance status

The ALQ3F48 matches the primary criteria (48VDC coil, SPST-NO form, through-hole mounting, PC pin termination) and maintains RoHS compliance. However, the contact rating is reduced to 5A, and the maximum switching voltage is limited to 250VAC and 30VDC. These differences establish ALQ3F48 as a partial substitute suitable only for applications where the lower current and voltage ratings are acceptable.

Parameter Comparison

Engineering Selection Recommendations

The ALQ3F48 is the identified substitute for the obsolete JS1AF-F-48V-F based on matching core electrical and mechanical specifications. Both relays are RoHS compliant and manufactured by Panasonic Electric Works.

Selection of ALQ3F48 as a replacement is appropriate when the application requirements permit operation within its reduced electrical ratings: maximum 5A contact current and maximum 30VDC switching voltage. The ALQ3F48 is actively manufactured, ensuring supply chain availability and long-term support compared to the obsolete JS1AF-F-48V-F.

Applications requiring the full 10A contact rating or 100VDC switching capability of the original JS1AF-F-48V-F must evaluate alternative relay families that maintain these specifications while offering active product status.

Frequently Asked Questions (FAQ)

Q: Can ALQ3F48 directly replace JS1AF-F-48V-F in all applications?

A: No. ALQ3F48 is a partial substitute. Direct replacement is limited to applications where contact current does not exceed 5A and switching voltage does not exceed 30VDC. Applications requiring 10A switching or 100VDC operation require alternative solutions.

Q: What are the key differences between these relays?

A: The primary differences are contact rating (10A vs. 5A), maximum switching voltage (100VDC vs. 30VDC), operating temperature upper limit (105°C vs. 85°C), and coil current (7.5mA vs. 4.2mA). Both share identical coil voltage (48VDC), contact form (SPST-NO), mounting type (through-hole), and termination style (PC pin).

Q: Are both relays RoHS compliant?

A: Yes. Both JS1AF-F-48V-F and ALQ3F48 are RoHS compliant and suitable for applications requiring environmental compliance.

Q: What is the packaging difference?

A: JS1AF-F-48V-F is supplied in standard packaging. ALQ3F48 is supplied in box packaging. Both are through-hole mounted components with PC pin termination.

Q: Why is JS1AF-F-48V-F obsolete?

A: The JS1AF-F-48V-F has been discontinued by Panasonic Electric Works. ALQ3F48 represents the active product line continuation for general purpose 48VDC SPST-NO relays from the same manufacturer.

Q: Can I use ALQ3F48 in high-temperature applications up to 105°C?

A: No. ALQ3F48 is rated for operation only to 85°C maximum. Applications requiring sustained operation above 85°C require alternative relay solutions that maintain the full -40°C to 105°C temperature range.