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

Part Overview

The JS1AF-18V-F is a general purpose relay manufactured by Panasonic Electric Works, featuring a SPST-NO (1 Form A) contact configuration with 18VDC coil voltage and 10A contact rating. This through-hole mounted relay is designed for general switching applications with sealed flux protection. The product is currently obsolete, making identification of suitable substitute components essential for ongoing system maintenance and new design implementations.

Substiute Parts

JS1AF-18V-F

Panasonic Electric WorksIn Stock: 930JS1AF-18V-F Datasheet

Current PartRFQ

ALQ318

Panasonic Electric WorksIn Stock: 3969ALQ318 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the JS1AF-18V-F is determined by the following critical parameters:

• Coil voltage matching at 18VDC
• Contact form configuration as SPST-NO (1 Form A)
• Through-hole mounting with PC pin termination
• Compatibility within the operating temperature and electrical switching specifications

The ALQ318 is identified as a substitute part. While this part maintains the same coil voltage (18VDC), contact form (SPST-NO), and mounting type (through-hole with PC pin termination), there are notable differences in contact rating and switching specifications that must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The ALQ318 serves as an active substitute for the obsolete JS1AF-18V-F. Both relays are manufactured by Panasonic Electric Works and share identical coil voltage, contact form, and mounting specifications. The ALQ318 offers the advantage of active product status with ROHS3 compliance and extended operating temperature range (-40°C to 85°C versus -70°C).

Selection of the ALQ318 requires evaluation of application-specific current requirements. The ALQ318 contact rating of 5A is lower than the JS1AF-18V-F rating of 10A. Applications requiring the full 10A switching capacity cannot use the ALQ318 as a direct substitute. The ALQ318 also exhibits reduced maximum DC switching voltage (30VDC versus 100VDC) and longer switching times (20ms versus 10ms).

For applications within the ALQ318 electrical specifications, the substitute provides compliance with current regulatory standards and access to active inventory.

Frequently Asked Questions (FAQ)

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

A: No. The ALQ318 has a maximum contact rating of 5A compared to the JS1AF-18V-F rating of 10A. Applications requiring switching currents above 5A cannot use the ALQ318. Additionally, the ALQ318 supports maximum DC switching voltage of 30VDC versus 100VDC for the original part.

Q: What are the key compatibility factors between these relays?

A: Both relays share 18VDC coil voltage, SPST-NO contact form, through-hole mounting, and PC pin termination. These matching parameters establish the substitution relationship. Differences in current rating, switching voltage, and timing characteristics must be verified against application requirements.

Q: How do the switching times differ?

A: The JS1AF-18V-F operates and releases in 10ms each. The ALQ318 requires 20ms for both operate and release functions. Applications with timing-critical switching requirements must account for this difference.

Q: Are there compliance differences between these parts?

A: The JS1AF-18V-F is RoHS Compliant. The ALQ318 is ROHS3 Compliant, representing a more current regulatory standard. The ALQ318 also carries additional approvals (CQC, cURuus, VDE) and is REACH Unaffected.

Q: What is the impact of different coil currents?

A: The JS1AF-18V-F requires 20mA coil current with 900 Ohms resistance. The ALQ318 requires 11.1mA with 1.62 kOhms resistance. The lower coil current of the ALQ318 may reduce power consumption in the control circuit but requires verification of driver circuit compatibility.

Q: How do the operating temperature ranges compare?

A: The JS1AF-18V-F operates from -40°C to 70°C. The ALQ318 extends this range to -40°C to 85°C, providing broader thermal operating capability.