Omron WLH12 Snap Action Switch - Equivalent & Substitute Parts

Part Overview

The Omron WLH12 is a snap action switch with SPDT (Single Pole Double Throw) circuit configuration, rated for 10A at 125V AC and 6A at 30V DC. It features a side rotary actuator with adjustable roller, chassis mount termination via screw terminals, and IP67 ingress protection suitable for dust-tight and waterproof applications. The WLH12 is classified as obsolete, making identification of active equivalent parts essential for ongoing procurement and system maintenance.

Substiute Parts

WLH12

Omron Automation and SafetyIn Stock: 1017WLH12 Datasheet

Current PartRFQ

WLCA12-N

Omron Automation and SafetyIn Stock: 1069WLCA12-N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The WLCA12-N qualifies as a direct substitute for the WLH12 based on the following critical parameters:

Electrical Compatibility: Both parts maintain identical circuit configuration (SPDT DB/DM), switch function (On-Mom), current ratings (10A AC / 6A DC), and voltage ratings (125V AC / 30V DC).

Mechanical Compatibility: Both parts feature the same actuator type (side rotary with adjustable roller), mounting configuration (chassis mount), and termination method (screw terminal).

Environmental Specifications: Both parts provide IP67 ingress protection and operate across the same temperature range (-10°C to 80°C).

Lifecycle Durability: Both parts specify identical electrical life (750,000 cycles) and mechanical life (15,000,000 cycles).

Key Differentiators: The WLCA12-N represents an active product status replacement for the obsolete WLH12, with minor variations in operating force (1360gf vs. 1000gf), release force (120gf vs. 100gf), and overtravel (70° vs. 55°). These mechanical parameter differences remain within acceptable substitution tolerances for the SPDT snap action switch category.

Parameter Comparison

Engineering Selection Recommendations

The WLCA12-N is the designated active equivalent for the obsolete WLH12. Selection of the WLCA12-N is supported by:

Product Status Alignment: The WLCA12-N maintains active product status with current manufacturing support, ensuring long-term availability and supply chain continuity compared to the obsolete WLH12.

Electrical and Mechanical Equivalence: All critical electrical parameters (current and voltage ratings), circuit configuration, actuator type, mounting method, and termination style are identical between the two parts.

Environmental and Durability Specifications: Both parts meet the same ingress protection rating (IP67), operating temperature range, electrical cycle life, and mechanical cycle life requirements.

Compliance Status: The WLCA12-N carries RoHS compliance certification, providing regulatory alignment for applications subject to hazardous substance restrictions.

Mechanical Parameter Variations: The WLCA12-N exhibits higher operating force (1360gf vs. 1000gf), higher release force (120gf vs. 100gf), and increased overtravel (70° vs. 55°). These variations represent design refinements in the active product line and do not compromise functional substitution for standard SPDT snap action switch applications.

Frequently Asked Questions (FAQ)

Q: Can the WLCA12-N directly replace the WLH12 in existing applications?

A: Yes. The WLCA12-N maintains identical electrical ratings (10A at 125V AC, 6A at 30V DC), circuit configuration (SPDT), actuator type (side rotary with adjustable roller), mounting configuration (chassis mount), and termination method (screw terminal). The mechanical parameter differences (operating force, release force, and overtravel) represent design improvements in the active product and do not prevent functional substitution.

Q: What is the significance of the WLH12 being classified as obsolete?

A: Obsolete status indicates that the WLH12 is no longer manufactured or supported by Omron. The WLCA12-N represents the active equivalent, ensuring access to current manufacturing, technical support, and supply chain availability for new designs and system maintenance.

Q: Are there packaging differences between the WLH12 and WLCA12-N?

A: The WLH12 is specified with dash packaging notation, while the WLCA12-N is supplied in bulk packaging. Both parts are functionally equivalent; packaging differences reflect distribution and inventory management practices only.

Q: Does the WLCA12-N meet regulatory compliance requirements?

A: The WLCA12-N carries RoHS compliance certification. Both parts are classified under ECCN EAR99 and HTSUS 8536.50.9055. Verify specific regulatory requirements for your application jurisdiction.

Q: What mechanical parameter differences exist between these parts?

A: The WLCA12-N specifies operating force of 1360gf (vs. 1000gf for WLH12), release force of 120gf (vs. 100gf), and overtravel of 70° (vs. 55°). Pretravel and differential travel remain identical at 15° and 12° respectively. These differences reflect design refinements and do not affect SPDT snap action switch functionality.

Q: Are both parts suitable for IP67-rated applications?

A: Yes. Both the WLH12 and WLCA12-N provide IP67 ingress protection (dust tight and waterproof), making them suitable for sealed enclosure and harsh environment applications.