BZLN-LH Snap Action Switch: Equivalent & Substitute Parts

Part Overview

The BZLN-LH is a snap action switch manufactured by Honeywell Sensing and Productivity Solutions, configured as a Single Pole Double Throw (SPDT) device with chassis mount installation. This switch is rated for 15A AC at 125V and features a round pin plunger actuator positioned on the left side. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing maintenance, repair, and system continuity applications.

Substiute Parts

BZLN-LH

Honeywell Sensing and Productivity SolutionsIn Stock: 701BZLN-LH 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-LH is based on strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

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

Mechanical Equivalence Criteria:

• Actuator type must be round pin plunger
• Mounting configuration must be chassis mount
• Physical installation envelope must accommodate the component

Compliance Criteria:

• RoHS compliance status must match or exceed the original specification
• Moisture sensitivity level must be MSL 1 or equivalent

The ZE-Q-2S from Omron Automation and Safety meets all mandatory electrical and mechanical parameters for direct substitution. Both components share identical circuit topology, current and voltage ratings, actuator geometry, and mounting methodology.

Parameter Comparison

Engineering Selection Recommendations

The ZE-Q-2S represents a direct functional substitute for the obsolete BZLN-LH. Both components satisfy identical electrical load requirements and mechanical installation constraints. The ZE-Q-2S carries active product status from Omron Automation and Safety, ensuring ongoing availability and supply chain continuity.

Considerations for Implementation:

The ZE-Q-2S employs screw terminal connections in place of the wire lead termination used in the BZLN-LH. This difference requires modification of the connection interface during installation but does not affect electrical performance or circuit functionality.

The ZE-Q-2S provides enhanced ingress protection rated at IP60, offering superior environmental sealing compared to the unspecified protection level of the original component. This enhancement is compatible with all applications requiring the baseline BZLN-LH specification.

Both components maintain RoHS compliance and MSL 1 moisture sensitivity classification, confirming suitability for standard industrial and commercial applications without additional environmental controls.

Frequently Asked Questions (FAQ)

Q: Can the ZE-Q-2S directly replace the BZLN-LH in existing circuits?

A: Yes. Both components share identical SPDT circuit topology, 15A AC / 500mA DC current ratings, and 125V voltage specifications. Electrical performance is equivalent. Connection interface modification from wire leads to screw terminals is required during physical installation.

Q: What is the primary reason for seeking a substitute for the BZLN-LH?

A: The BZLN-LH is classified as obsolete. The ZE-Q-2S is an active product with confirmed ongoing manufacturing and distribution, ensuring long-term component availability.

Q: Are there mechanical installation differences between these components?

A: Both components use chassis mount configuration with round pin plunger actuators. Physical mounting envelope compatibility should be verified during design integration. The ZE-Q-2S provides enhanced IP60 ingress protection not specified in the original BZLN-LH.

Q: Do both components meet current compliance standards?

A: Yes. Both the BZLN-LH and ZE-Q-2S are RoHS compliant and carry MSL 1 moisture sensitivity classification, confirming compatibility with current regulatory requirements and standard handling procedures.

Q: What is the operational temperature difference between these components?

A: The BZLN-LH operates across -32°C to 55°C. The ZE-Q-2S operates across -10°C to 80°C. For applications within the BZLN-LH temperature range, both components are functionally equivalent. Applications requiring operation below -10°C must retain the original BZLN-LH specification.

Q: How does the termination style difference affect circuit integration?

A: The BZLN-LH uses wire leads; the ZE-Q-2S uses screw terminals. This difference affects only the physical connection method and does not alter electrical circuit behavior, signal integrity, or load handling capacity.