JQ1A-B-18V-F Equivalent & Substitute Parts

Part Overview

The JQ1A-B-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 5A contact rating. This through-hole mounted relay is designed for general switching applications requiring non-latching operation. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing system maintenance and new design implementations where equivalent functionality is required.

Substiute Parts

JQ1A-B-18V-F

Panasonic Electric WorksIn Stock: 863JQ1A-B-18V-F Datasheet

Current PartRFQ

ALQ318

Panasonic Electric WorksIn Stock: 3969ALQ318 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the JQ1A-B-18V-F is determined by strict equivalence across the following critical parameters:

• Coil Voltage: Must be 18VDC to ensure direct compatibility with existing circuit designs
• Contact Form: Must be SPST-NO (1 Form A) to maintain identical switching topology
• Contact Rating (Current): Must support minimum 5A to handle specified load requirements
• Mounting Type: Must be Through Hole to fit existing PCB layouts
• Coil Type: Must be Non Latching for identical operational behavior
• Termination Style: Must be PC Pin for direct connection compatibility
• Operating Temperature Range: Must encompass -40°C ~ 85°C minimum
• Coil Current and Resistance: Must match 11.1 mA and 1.62 kOhms for circuit compatibility

The ALQ318 meets all these critical substitution criteria and is therefore a valid equivalent part.

Parameter Comparison

Engineering Selection Recommendations

The ALQ318 is a direct functional equivalent to the JQ1A-B-18V-F and is the appropriate substitute part for this obsolete relay. Selection is based on the following factors:

Product Status: The ALQ318 is Active, ensuring ongoing availability and supply chain continuity, whereas the JQ1A-B-18V-F is Obsolete.

Compliance: Both parts are RoHS compliant. The ALQ318 carries ROHS3 Compliant status, meeting current regulatory requirements. The ALQ318 additionally holds certifications from CQC, cURuus, and VDE, providing enhanced qualification for regulated applications.

Electrical Equivalence: All critical electrical parameters match exactly, including coil voltage, contact form, current rating, coil current, and resistance. The release time of the ALQ318 (20 ms) is marginally longer than the JQ1A-B-18V-F (10 ms), which is acceptable for general purpose switching applications and does not impact functional compatibility.

Physical Compatibility: Both parts share identical mounting type (Through Hole) and termination style (PC Pin), enabling direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can the ALQ318 be used as a direct replacement for the JQ1A-B-18V-F without circuit modifications?

A: Yes. The ALQ318 matches all critical electrical and mechanical parameters. No circuit modifications are required for substitution.

Q: What is the difference in release time between these parts, and does it matter?

A: The JQ1A-B-18V-F has a 10 ms release time, while the ALQ318 has a 20 ms release time. For general purpose switching applications, this difference is not functionally significant. Applications with strict timing requirements should evaluate this parameter against specific system needs.

Q: Are there packaging differences between the JQ1A-B-18V-F and ALQ318?

A: Yes. The JQ1A-B-18V-F is supplied in Bulk packaging, while the ALQ318 is supplied in Box packaging. This affects order quantities and handling but does not impact electrical or mechanical compatibility.

Q: What certifications does the ALQ318 carry?

A: The ALQ318 holds certifications from CQC, cURuus, and VDE, in addition to RoHS3 compliance. These certifications support use in regulated and international applications.

Q: Why is the JQ1A-B-18V-F obsolete?

A: Product obsolescence is determined by the manufacturer. The ALQ318 is the active equivalent and is recommended for all new designs and ongoing maintenance applications.