JQ1AP-18V-F Equivalent & Substitute Parts

Part Overview

The JQ1AP-18V-F is a general purpose relay manufactured by Panasonic Electric Works, configured as a SPST-NO (1 Form A) with an 18VDC coil and 10A contact rating. This through-hole mounted relay is designed for general switching applications requiring reliable electromechanical actuation. The product is currently obsolete, making identification of functionally equivalent alternatives necessary for ongoing maintenance, repair, and legacy system support.

Substiute Parts

JQ1AP-18V-F

Panasonic Electric WorksIn Stock: 984JQ1AP-18V-F Datasheet

Current PartRFQ

ALQ318

Panasonic Electric WorksIn Stock: 3969ALQ318 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the JQ1AP-18V-F is evaluated based on the following critical parameters that must align for functional equivalence:

• Coil Voltage: 18VDC (exact match required for direct circuit compatibility)
• Contact Form: SPST-NO (1 Form A) (switching topology must be identical)
• Mounting Type: Through Hole (physical installation compatibility)
• Termination Style: PC Pin (PCB connection method)
• Coil Current & Resistance: 11.1 mA and 1.62 kOhms (driver circuit compatibility)
• Coil Type: Non Latching (operational behavior requirement)

The ALQ318 meets these core substitution criteria. However, differences exist in contact rating, switching voltage limits, and operating temperature range, which must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The ALQ318 serves as a functional substitute for the JQ1AP-18V-F based on matching coil voltage, contact form, mounting type, and termination style. The ALQ318 is currently in active production status, ensuring long-term availability compared to the obsolete JQ1AP-18V-F.

Key considerations for substitution:

• Contact Current Rating: The ALQ318 is rated for 5A maximum, compared to the JQ1AP-18V-F at 10A. Applications requiring switching currents exceeding 5A are not suitable for the ALQ318.
• Switching Voltage Limits: The ALQ318 supports 250VAC and 30VDC maximum, versus 250VAC and 110VDC for the original part. Applications switching DC loads above 30V require the JQ1AP-18V-F or alternative parts with higher DC voltage ratings.
• Operating Temperature: The ALQ318 extends the upper operating temperature to 85°C, providing broader environmental compatibility than the JQ1AP-18V-F at 70°C maximum.
• Release Time: The ALQ318 has a 20ms release time versus 10ms for the JQ1AP-18V-F. Applications with strict timing requirements must account for this difference.
• Compliance & Certifications: The ALQ318 carries CQC, cURuus, and VDE approvals, plus RoHS3 compliance and REACH unaffected status, supporting modern regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the ALQ318 directly replace the JQ1AP-18V-F in all applications?

A: Direct replacement is possible only when the application current requirement does not exceed 5A and the DC switching voltage does not exceed 30V. The ALQ318 is not suitable for applications requiring the full 10A rating or higher DC voltage switching capability of the original part.

Q: What is the impact of the different release times (10ms vs 20ms)?

A: The ALQ318 has a 20ms release time compared to the JQ1AP-18V-F at 10ms. This affects the speed at which the relay contacts open after the coil is de-energized. Applications with timing-critical switching sequences must evaluate whether the longer release time is acceptable.

Q: Are the coil drive requirements identical between these parts?

A: Yes. Both parts have identical coil voltage (18VDC), coil current (11.1 mA), and coil resistance (1.62 kOhms). Existing driver circuits designed for the JQ1AP-18V-F will operate the ALQ318 without modification.

Q: What are the packaging differences?

A: The JQ1AP-18V-F uses standard packaging, while the ALQ318 is supplied in box packaging. Both use PC pin termination for through-hole PCB mounting, ensuring mechanical compatibility.

Q: Does the ALQ318 meet modern compliance standards?

A: Yes. The ALQ318 is RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. It also carries CQC, cURuus, and VDE certifications for international market acceptance.

Q: What contact material difference exists, and does it matter?

A: The JQ1AP-18V-F uses Silver Tin Oxide (AgSnO) contacts, while the ALQ318 uses Silver Nickel (AgNi). Both are standard relay contact materials suitable for general switching applications. Material selection depends on specific load characteristics and application environment.