WR18ASN/UCV Equivalent & Substitute Parts

Part Overview

The WR18ASN/UCV is a rocker switch manufactured by NKK Switches, classified as SPDT (Single Pole Double Throw) with a momentary-off-momentary (Mom-Off-Mom) switch function. This panel-mount, snap-in component is rated for 15A at 125V AC and 30V DC, featuring a concave black actuator with solder lug termination and IP67 ingress protection.

The WR18ASN/UCV is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

WR18ASN/UCV

NKK SwitchesIn Stock: 866WR18ASN/UCV Datasheet

Current PartRFQ

WR18ASN/CUL

NKK SwitchesIn Stock: 921WR18ASN/CUL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the WR18ASN/UCV is determined by strict equivalence across the following critical parameters:

• Circuit configuration (SPDT)
• Switch function (Mom-Off-Mom)
• Current rating (15A AC/DC)
• Voltage ratings (125V AC, 30V DC)
• Mounting type (Panel Mount, Snap-In)
• Actuator type and color (Concave, Black)
• Termination style (Solder Lug)
• Ingress protection rating (IP67)
• Panel cutout dimensions (34.20mm x 17.20mm)
• Operating temperature range (-25°C to 85°C)
• Approval agencies (EN, UL)

Only parts matching all these parameters across the WR series are classified as direct substitutes. Variations in product status, compliance certifications, or inventory availability do not affect functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The WR18ASN/CUL is a direct functional equivalent to the WR18ASN/UCV. Both components share identical electrical ratings, mechanical specifications, and dimensional requirements. The primary distinction is product status: the WR18ASN/UCV is obsolete, while the WR18ASN/CUL is active and currently in production.

The WR18ASN/CUL carries ROHS3 compliance certification, providing enhanced environmental and regulatory alignment for new designs or system updates. Both parts maintain EN and UL approval agency certifications, ensuring compliance with international safety and performance standards.

For applications requiring the WR18ASN/UCV, the WR18ASN/CUL provides direct substitution without design modification or re-qualification of electrical or mechanical interfaces.

Frequently Asked Questions (FAQ)

Q: Can the WR18ASN/CUL replace the WR18ASN/UCV in existing designs?

A: Yes. The WR18ASN/CUL is functionally equivalent across all electrical, mechanical, and dimensional parameters. No circuit redesign or panel modification is required.

Q: What is the difference between the WR18ASN/UCV and WR18ASN/CUL?

A: The primary difference is product status and compliance certification. The WR18ASN/UCV is obsolete; the WR18ASN/CUL is active production. The WR18ASN/CUL includes ROHS3 compliance. All functional and electrical specifications are identical.

Q: Are the panel cutout dimensions identical?

A: Yes. Both parts require a rectangular panel cutout of 34.20mm x 17.20mm. Direct mechanical substitution is possible without panel modification.

Q: Do both parts have the same termination style?

A: Yes. Both the WR18ASN/UCV and WR18ASN/CUL use solder lug termination, ensuring compatibility with existing PCB layouts and wiring harnesses.

Q: What is the ingress protection rating for both parts?

A: Both parts are rated IP67 (dust tight and waterproof), providing equivalent environmental protection in sealed or exposed applications.

Q: Are approval certifications the same?

A: Yes. Both parts carry EN and UL approval agency certifications. The WR18ASN/CUL additionally includes ROHS3 compliance.