BZLN-2-RH5 Equivalent & Substitute Parts Reference

Part Overview

The BZLN-2-RH5 is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions. This chassis-mounted switch is rated for 15A AC at 125V and features a lever-roller actuator with wire lead termination. The product is currently obsolete, making identification of functionally equivalent alternatives essential for system maintenance, repair, and component sourcing in legacy applications.

Substiute Parts

BZLN-2-RH5

Honeywell Sensing and Productivity SolutionsIn Stock: 840BZLN-2-RH5 Datasheet

Current PartRFQ

ZE-QA2-2S

Omron Automation and SafetyIn Stock: 716ZE-QA2-2S Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BZLN-2-RH5 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Criteria:

• Circuit configuration: SPDT
• Switch function: On-Momentary
• Current rating: 15A AC minimum
• Voltage rating: 125V AC minimum
• Actuator type: Lever with roller
• Mounting type: Chassis Mount
• RoHS compliance status

The ZE-QA2-2S from Omron Automation and Safety meets all mandatory electrical and mechanical criteria for direct substitution. Both switches share identical circuit topology, current and voltage ratings, actuator configuration, and mounting methodology. Both are RoHS compliant with MSL 1 rating.

Parameter Comparison

Engineering Selection Recommendations

The ZE-QA2-2S is a direct functional equivalent for the obsolete BZLN-2-RH5. Both switches satisfy identical electrical specifications (15A AC, 125V AC/DC, SPDT configuration) and mechanical requirements (lever-roller actuator, chassis mount, on-momentary function).

Key Considerations:

The ZE-QA2-2S is currently in active production status, ensuring long-term availability and supply chain continuity. Both components carry RoHS compliance certification and MSL 1 rating, meeting modern environmental and reliability standards.

Termination style differs between the two parts: the BZLN-2-RH5 uses wire leads while the ZE-QA2-2S employs screw terminals. This difference requires evaluation of the existing circuit board or wiring harness design to determine if terminal adaptation is necessary.

Operating force specifications vary (1360gf for BZLN-2-RH5 versus 570gf for ZE-QA2-2S). The ZE-QA2-2S requires lower actuation force. Applications with mechanical linkages or actuator systems must verify that this difference does not affect system performance or user interface feel.

The ZE-QA2-2S provides documented electrical and mechanical life ratings (500,000 and 10,000,000 cycles respectively), whereas the BZLN-2-RH5 specifications do not include these values. The ZE-QA2-2S also offers IP60 ingress protection, providing enhanced environmental sealing compared to the unspecified protection level of the original part.

Operating temperature range for the ZE-QA2-2S (-10°C to 80°C) is narrower than the BZLN-2-RH5 (-32°C to 71°C) at the lower end. Applications requiring operation below -10°C must retain the original BZLN-2-RH5 specification or identify alternative solutions.

Frequently Asked Questions (FAQ)

Q: Can the ZE-QA2-2S directly replace the BZLN-2-RH5 in all applications?

A: The ZE-QA2-2S meets all mandatory electrical and mechanical specifications for substitution. However, three factors require verification: (1) termination style compatibility (wire leads versus screw terminals), (2) actuator force requirements (570gf versus 1360gf), and (3) minimum operating temperature requirements (ZE-QA2-2S rated to -10°C minimum versus BZLN-2-RH5 at -32°C minimum).

Q: What is the difference between wire lead and screw terminal termination?

A: Wire leads are pre-attached conductors soldered directly to circuit boards or wiring harnesses. Screw terminals accept stripped wire ends secured by set screws. The ZE-QA2-2S screw terminal design allows field termination and easier replacement, while the BZLN-2-RH5 wire lead design requires soldering or connector adaptation.

Q: Are both switches RoHS compliant?

A: Yes. Both the BZLN-2-RH5 and ZE-QA2-2S carry RoHS compliance certification and MSL 1 (unlimited moisture sensitivity) rating, meeting current environmental and reliability standards.

Q: Why is the operating force different between these switches?

A: Operating force (1360gf for BZLN-2-RH5 versus 570gf for ZE-QA2-2S) reflects different mechanical design approaches. The ZE-QA2-2S requires approximately 58% less force to actuate. Applications with mechanical linkages, lever systems, or user-operated controls must verify that reduced actuation force does not compromise system function or user experience.

Q: What is the significance of the IP60 rating on the ZE-QA2-2S?

A: IP60 (dust tight) provides enhanced environmental protection against particulate ingress. The BZLN-2-RH5 does not specify an ingress protection rating. Applications in dusty, contaminated, or harsh environments benefit from the ZE-QA2-2S environmental sealing.

Q: Can the ZE-QA2-2S be used in applications requiring operation below -10°C?

A: No. The ZE-QA2-2S operating temperature minimum is -10°C. Applications requiring operation at -32°C or lower must retain the BZLN-2-RH5 specification or identify alternative components rated for the required temperature range.

Q: What is the inventory status for these components?

A: The BZLN-2-RH5 is obsolete with 750 pieces available in current stock. The ZE-QA2-2S is active production with 687 pieces in current inventory. Long-term availability is assured only for the ZE-QA2-2S.