BZ-2RQ66 Equivalent & Substitute Parts Reference

Part Overview

The BZ-2RQ66 is an active-status snap action switch manufactured by Honeywell Sensing and Productivity Solutions. This SPDT (Single Pole Double Throw) panel mount switch is rated for 15A AC at 125V with an overtravel plunger actuator and screw terminal connections. The switch operates in an On-Momentary function and is designed for applications requiring reliable snap action switching with mechanical durability. Substitute parts are identified when equivalent electrical and mechanical parameters align with application requirements, allowing for component interchangeability based on circuit compatibility and environmental specifications.

Substiute Parts

BZ-2RQ66

Honeywell Sensing and Productivity SolutionsIn Stock: 1029BZ-2RQ66 Datasheet

Current PartRFQ

HBS2KCB4SJ055C

C&KIn Stock: 1273HBS2KCB4SJ055C Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BZ-2RQ66 is determined by the following critical parameters:

Circuit Compatibility: The substitute part must maintain SPDT configuration to preserve circuit switching logic.

Electrical Ratings: The substitute must support the application voltage (125V AC/DC). Current rating of the substitute may exceed the original specification (15A AC minimum requirement) without creating incompatibility, as higher-rated switches can safely handle lower current loads.

Mechanical Interface: Panel mount configuration with screw terminal connections must be preserved to ensure physical installation compatibility.

Actuator Characteristics: Overtravel plunger actuator type ensures consistent switching behavior and mechanical reliability across substitutes.

Environmental Compliance: RoHS compliance status and operating temperature range determine suitability for regulated applications and thermal environments.

The HBS2KCB4SJ055C from C&K meets these substitution criteria through equivalent circuit topology, matching voltage ratings, compatible mounting and termination, and maintained RoHS compliance.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: The HBS2KCB4SJ055C is suitable as a substitute for the BZ-2RQ66 in applications where the following conditions are met:

• Circuit requires SPDT switching at 125V AC/DC
• Application current demand does not exceed 15A AC (the original specification)
• Panel mount configuration with screw terminals is required
• On-Momentary switch function is required

Compliance Considerations: Both parts maintain RoHS compliance. The HBS2KCB4SJ055C carries ROHS3 certification, representing compliance with the current regulatory standard. The substitute also carries REACH Affected status, which may be relevant for applications subject to REACH regulations.

Environmental Suitability: The HBS2KCB4SJ055C supports an extended operating temperature range (-55°C to 150°C) compared to the BZ-2RQ66 (-55°C to 85°C). This makes the substitute suitable for applications requiring higher temperature operation.

Mechanical Characteristics: The substitute operates at 368 gf, which falls within the operating force range of the original (255–368 gf). Release force remains equivalent at 113 gf. The substitute provides IP65 ingress protection, offering enhanced environmental sealing not specified for the original part.

Inventory Availability: The HBS2KCB4SJ055C is available in higher stock quantity (1,211 pcs) compared to the BZ-2RQ66 (920 pcs), supporting supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the HBS2KCB4SJ055C replace the BZ-2RQ66 in any application?

A: The HBS2KCB4SJ055C is compatible as a substitute when the application circuit is SPDT, operates at 125V AC/DC, requires panel mount with screw terminals, and does not exceed 15A AC current demand. The substitute's higher current rating (20A AC) does not prevent substitution for lower-current applications.

Q: What is the significance of the different operating force values?

A: The BZ-2RQ66 operates within a range of 255–368 gf, while the HBS2KCB4SJ055C operates at 368 gf (the upper limit of the original range). This means the substitute requires slightly more force to actuate but remains within acceptable mechanical parameters for the same application class.

Q: Does the IP65 rating of the substitute affect compatibility?

A: No. The IP65 ingress protection rating of the HBS2KCB4SJ055C provides additional environmental sealing compared to the unspecified rating of the BZ-2RQ66. This enhancement does not create incompatibility; it expands the substitute's suitability to applications requiring dust and moisture resistance.

Q: Are there differences in electrical life between these parts?

A: The BZ-2RQ66 specifies 20,000,000 mechanical life cycles with no electrical life specification. The HBS2KCB4SJ055C specifies 150,000 electrical life cycles with no mechanical life specification. These represent different measurement standards and do not indicate incompatibility for equivalent applications.

Q: Can the substitute be used in higher temperature environments?

A: Yes. The HBS2KCB4SJ055C supports operation from -55°C to 150°C, compared to the BZ-2RQ66 range of -55°C to 85°C. The substitute is suitable for applications requiring sustained operation above 85°C.

Q: What packaging format is available for both parts?

A: Both the BZ-2RQ66 and HBS2KCB4SJ055C are supplied in bulk packaging, suitable for direct integration into manufacturing or assembly processes.

Q: Are both parts compliant with current regulatory standards?

A: Yes. The BZ-2RQ66 is RoHS Compliant. The HBS2KCB4SJ055C is ROHS3 Compliant and REACH Affected, representing compliance with current and evolving regulatory frameworks.