BZLN-RH Snap Action Switch Equivalent & Substitute Parts

Part Overview

The BZLN-RH is a snap action switch manufactured by Honeywell Sensing and Productivity Solutions, classified as an SPDT (Single Pole Double Throw) chassis mount switch with a round pin plunger actuator. This component is rated for 15A AC at 125V and 500mA DC at 125V, designed for on-momentary switch function applications.

The BZLN-RH 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

BZLN-RH

Honeywell Sensing and Productivity SolutionsIn Stock: 739BZLN-RH Datasheet

Current PartRFQ

ZE-Q-2S

Omron Automation and SafetyIn Stock: 1084ZE-Q-2S Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BZLN-RH is based on strict equivalence of the following critical parameters:

Electrical Equivalence:

• Circuit configuration must be SPDT
• Switch function must be On-Momentary
• Current rating must support minimum 15A AC at 125V and 500mA DC at 125V
• Voltage ratings must be rated for 125V AC and 125V DC

Mechanical Equivalence:

• Actuator type must be round pin plunger
• Mounting type must be chassis mount
• Physical form factor must accommodate existing mechanical interfaces

Compliance Equivalence:

• RoHS compliance status must match or exceed the original specification
• Moisture sensitivity level must be compatible with storage and handling requirements

The substitute part ZE-Q-2S from Omron Automation and Safety meets all critical electrical and mechanical parameters required for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

The ZE-Q-2S from Omron Automation and Safety is a direct electrical and mechanical substitute for the obsolete BZLN-RH. Both components share identical circuit configuration, switch function, current ratings, voltage ratings, actuator type, and mounting type.

Key Considerations for Selection:

Termination Interface: The primary difference between the BZLN-RH and ZE-Q-2S is the termination style. The BZLN-RH uses wire leads, while the ZE-Q-2S uses screw terminals. Applications currently wired to the BZLN-RH will require terminal adapter blocks or rewiring to accommodate the screw terminal configuration of the ZE-Q-2S.

Operating Temperature Range: The BZLN-RH operates from -32°C to 55°C, while the ZE-Q-2S operates from -10°C to 80°C. Applications requiring operation below -10°C must retain the BZLN-RH or identify alternative substitutes with extended low-temperature ratings.

Ingress Protection: The ZE-Q-2S provides IP60 dust-tight protection, which exceeds the specification of the BZLN-RH. This enhancement is compatible with all applications designed for the original component.

Product Availability: The ZE-Q-2S is currently in active production status with documented inventory availability, whereas the BZLN-RH is obsolete. Transition to the ZE-Q-2S ensures long-term supply chain continuity and support.

Compliance: Both components are RoHS compliant and carry identical moisture sensitivity levels, ensuring regulatory and environmental compatibility.

Frequently Asked Questions (FAQ)

Q: Can the ZE-Q-2S directly replace the BZLN-RH without any modifications?

A: The ZE-Q-2S is electrically and mechanically equivalent to the BZLN-RH. However, the termination style differs: the BZLN-RH uses wire leads while the ZE-Q-2S uses screw terminals. Applications must adapt the connection interface accordingly. No modifications to the switch function or electrical performance are required.

Q: What is the difference in operating temperature range between these two switches?

A: The BZLN-RH operates from -32°C to 55°C, while the ZE-Q-2S operates from -10°C to 80°C. The ZE-Q-2S does not support operation below -10°C. Applications requiring operation at temperatures below -10°C must use the BZLN-RH or identify alternative components with extended low-temperature specifications.

Q: Are both switches RoHS compliant?

A: Yes, both the BZLN-RH and ZE-Q-2S are RoHS compliant. Both components carry identical moisture sensitivity levels (MSL 1 - Unlimited), ensuring compatibility with standard storage and handling procedures.

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

A: The ZE-Q-2S provides IP60 dust-tight ingress protection, which is an enhancement over the BZLN-RH specification. This additional protection is compatible with all applications designed for the original component and provides improved environmental resistance in dusty or contaminated operating environments.

Q: Why is the BZLN-RH listed as obsolete?

A: The BZLN-RH is no longer manufactured by Honeywell Sensing and Productivity Solutions. The ZE-Q-2S from Omron Automation and Safety is the recommended active substitute for new designs and ongoing production requirements.

Q: Can I use the ZE-Q-2S in applications originally designed for the BZLN-RH?

A: Yes, the ZE-Q-2S is suitable for applications originally designed for the BZLN-RH, provided that the operating temperature range (-10°C to 80°C) is compatible with your application requirements and the screw terminal interface can be accommodated in your wiring configuration.