JS1AF-B-18V-F General Purpose Relay Equivalent & Substitute Parts

Part Overview

The JS1AF-B-18V-F is a general purpose relay manufactured by Panasonic Electric Works, featuring a SPST-NO (1 Form A) contact configuration with an 18VDC coil and 10A contact rating. This through-hole mounted relay is designed for general switching applications in industrial and commercial equipment.

The JS1AF-B-18V-F is classified as obsolete. Identifying suitable substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for equipment utilizing this relay.

Substiute Parts

JS1AF-B-18V-F

Panasonic Electric WorksIn Stock: 970JS1AF-B-18V-F Datasheet

Current PartRFQ

ALQ318

Panasonic Electric WorksIn Stock: 3969ALQ318 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the JS1AF-B-18V-F is evaluated based on the following critical parameters that define functional equivalence:

Primary Matching Criteria:

• Coil voltage: 18VDC (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)
• Operating temperature range: -40°C ~ 85°C (exact match required)
• Coil type: Non Latching (exact match required)

Secondary Compatibility Criteria:

• Contact rating current: Minimum 10A or higher acceptable
• Switching voltage: Must support 250VAC and 100VDC or higher
• Coil insulation: Class B or higher acceptable

The ALQ318 satisfies the primary matching criteria and maintains functional compatibility within the secondary criteria, with the exception of contact rating current, which is specified at 5A. This represents a reduction in current-carrying capacity compared to the original 10A specification.

Parameter Comparison

Engineering Selection Recommendations

The ALQ318 is an active product from Panasonic Electric Works and represents the primary substitute option for the obsolete JS1AF-B-18V-F. Both relays share identical coil voltage, contact form, mounting configuration, and operating temperature specifications.

Key Considerations:

The ALQ318 exhibits reduced contact rating current (5A versus 10A) and reduced maximum DC switching voltage (30VDC versus 100VDC). These reductions must be evaluated against the actual load requirements of the target application. If the application requires switching loads exceeding 5A or DC voltages exceeding 30VDC, the ALQ318 is not suitable.

The ALQ318 demonstrates improved compliance status (ROHS3 Compliant versus RoHS Compliant) and includes additional approval certifications (CQC, cURuus, VDE). The ALQ318 also features lower coil current (11.1mA versus 20mA) and higher coil resistance (1.62kOhms versus 900 Ohms), which may reduce power consumption in the control circuit.

Timing characteristics differ: the ALQ318 exhibits longer operate and release times (20ms each versus 10ms each). This difference is significant for applications requiring rapid switching response.

Frequently Asked Questions (FAQ)

Q: Can the ALQ318 directly replace the JS1AF-B-18V-F in all applications?

A: Direct replacement is possible only if the application load does not exceed 5A and does not require DC switching voltages above 30VDC. The original JS1AF-B-18V-F supports 10A and 100VDC maximum. Applications operating at the upper limits of the original specification require evaluation of alternative substitutes.

Q: What is the impact of the different contact materials (AgSnO versus AgNi)?

A: Contact material differences affect arc resistance, contact wear characteristics, and suitability for specific load types. Silver Tin Oxide (AgSnO) and Silver Nickel (AgNi) exhibit different performance profiles across resistive, inductive, and capacitive loads. Material selection should align with the specific switching application.

Q: Why does the ALQ318 have longer switching times (20ms versus 10ms)?

A: Switching time differences result from design variations in the magnetic circuit and mechanical linkage. Applications requiring response times of 10ms or faster may be affected by the ALQ318's 20ms timing. Verify that application timing requirements accommodate this difference.

Q: Are there packaging differences between these relays?

A: The JS1AF-B-18V-F uses standard through-hole PC pin termination. The ALQ318 is supplied in Box packaging. Both maintain identical through-hole mounting and PC pin termination, ensuring mechanical compatibility on printed circuit boards.

Q: What compliance advantages does the ALQ318 offer?

A: The ALQ318 holds ROHS3 Compliant status and includes CQC, cURuus, and VDE certifications. The JS1AF-B-18V-F holds RoHS Compliant status. The ALQ318 provides enhanced regulatory compliance for applications requiring current certification standards.

Q: How do the different coil specifications affect circuit design?

A: The ALQ318 requires lower coil current (11.1mA versus 20mA) and exhibits higher coil resistance (1.62kOhms versus 900 Ohms). These differences may reduce power consumption but require verification that the control circuit voltage source can reliably operate the ALQ318 at its specified must-operate voltage of 14.6VDC.