JS1A-18V-F General Purpose Relay Equivalent & Substitute Parts

Part Overview

The JS1A-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 construction and Class E coil insulation. The product is currently obsolete, making identification of suitable substitute components essential for ongoing system maintenance and new design implementations.

Substiute Parts

JS1A-18V-F

Panasonic Electric WorksIn Stock: 1096JS1A-18V-F Datasheet

Current PartRFQ

ALQ318

Panasonic Electric WorksIn Stock: 3969ALQ318 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the JS1A-18V-F is determined by the following critical parameters:

• Coil Voltage: 18VDC (primary control signal requirement)
• Contact Form: SPST-NO (1 Form A) (switching topology requirement)
• Mounting Type: Through Hole (PCB integration requirement)
• Termination Style: PC Pin (connection interface requirement)
• Coil Type: Non Latching (operational behavior requirement)

The ALQ318 is identified as a substitute part. While it maintains compatibility in coil voltage, contact form, mounting type, termination style, and coil type, it exhibits differences in contact current rating, switching voltage specifications, and coil characteristics that must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The ALQ318 is an active product from Panasonic Electric Works and represents a viable substitute for the obsolete JS1A-18V-F in applications where the following conditions are met:

• Load current requirements do not exceed 5A (ALQ318 contact rating versus 10A for JS1A-18V-F)
• DC switching voltage does not exceed 30VDC (ALQ318 specification versus 100VDC for JS1A-18V-F)
• Operating temperature range of -40°C to 85°C is acceptable (ALQ318 provides extended upper temperature limit)
• Response time tolerance accommodates 20ms operate and release times (ALQ318 versus 10ms for JS1A-18V-F)
• Coil voltage supply stability maintains minimum 14.6VDC operation threshold (ALQ318 requirement)

The ALQ318 carries ROHS3 compliance and maintains equivalent RoHS status. Both relays feature sealed construction and non-latching coil operation. The ALQ318 includes additional approval certifications (CQC, cURuus, VDE) and REACH compliance documentation.

Frequently Asked Questions (FAQ)

Q: Can the ALQ318 directly replace the JS1A-18V-F in all applications?

A: No. The ALQ318 has a lower contact current rating (5A versus 10A) and reduced maximum DC switching voltage (30VDC versus 100VDC). Substitution is valid only when application load current and switching voltage requirements fall within ALQ318 specifications.

Q: What are the key differences in electrical performance?

A: The ALQ318 requires higher minimum operating voltage (14.6VDC versus 12.6VDC), has slower response times (20ms versus 10ms), and features different contact material (Silver Nickel versus Silver Tin Oxide). Coil current is lower (11.1mA versus 20mA), reducing drive circuit power requirements.

Q: Are both relays compatible with the same PCB footprint?

A: Both relays use through-hole PC pin termination and are mounted through-hole. Physical footprint compatibility must be verified against specific PCB design documentation, as dimensional specifications are not provided in this reference.

Q: What compliance certifications apply to each part?

A: The JS1A-18V-F is RoHS Compliant. The ALQ318 is ROHS3 Compliant and additionally holds CQC, cURuus, and VDE approvals, with REACH Unaffected status.

Q: Which relay should be selected for new designs?

A: The ALQ318 is the appropriate choice for new designs, as it carries active product status and current compliance certifications. The JS1A-18V-F is obsolete and should not be specified for new applications.