BZ-2RQ18 Equivalent & Substitute Parts

Part Overview

The BZ-2RQ18 is a snap action switch manufactured by Honeywell Sensing and Productivity Solutions, configured as a single-pole double-throw (SPDT) panel mount device rated for 15A at 125V AC and 500mA at 125V DC. The switch features a roller plunger actuator with momentary on-off functionality and is designed for applications requiring reliable electromechanical switching with high mechanical cycle life.

The BZ-2RQ18 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain system functionality, ensure supply chain continuity, and support ongoing maintenance and repair operations for legacy equipment utilizing this component.

Substiute Parts

BZ-2RQ18

Honeywell Sensing and Productivity SolutionsIn Stock: 997BZ-2RQ18 Datasheet

Current PartRFQ

ZE-Q22-2

Omron Automation and SafetyIn Stock: 839ZE-Q22-2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BZ-2RQ18 is determined by the following critical parameters:

Electrical Compatibility Requirements:

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

Mechanical Compatibility Requirements:

• Actuator type must be roller plunger
• Differential travel specification of 0.002" (0.05mm) is required for consistent switching behavior

Environmental and Compliance Requirements:

• Operating temperature range must encompass or exceed the application requirements
• RoHS compliance status must be verified for regulatory adherence
• Moisture sensitivity level must be acceptable for the intended environment

The ZE-Q22-2 manufactured by Omron Automation and Safety meets the electrical and mechanical core requirements for substitution. However, differences in mounting type, termination style, operating temperature range, and mechanical life cycle rating require engineering evaluation for specific application contexts.

Parameter Comparison

Engineering Selection Recommendations

For Direct Electrical Substitution:

The ZE-Q22-2 provides electrical equivalence to the BZ-2RQ18 across all primary switching parameters: SPDT circuit configuration, 15A AC / 500mA DC current ratings, 125V AC/DC voltage ratings, and momentary switch function. Both components maintain identical differential travel specifications and moisture sensitivity ratings.

Compliance Considerations:

The BZ-2RQ18 is RoHS Compliant. The ZE-Q22-2 is ROHS3 Compliant and REACH Affected, indicating more recent regulatory alignment. Both components carry EAR99 ECCN classification.

Mechanical and Environmental Factors:

The BZ-2RQ18 supports an extended operating temperature range of -55°C to 85°C compared to the ZE-Q22-2 range of -10°C to 80°C. Applications requiring operation below -10°C require the BZ-2RQ18 or alternative components rated for lower temperatures.

The BZ-2RQ18 is rated for 20,000,000 mechanical cycles, while the ZE-Q22-2 is rated for 10,000,000 cycles. Applications with high cycle count requirements may necessitate the BZ-2RQ18 or components with equivalent or higher cycle ratings.

Mounting and Termination Differences:

The BZ-2RQ18 is panel mount with solder lug termination. The ZE-Q22-2 is chassis mount with screw terminal termination. Substitution requires mechanical redesign of the mounting interface and electrical connection methodology. These differences are not transparent substitutions and require circuit board or enclosure modification.

Product Status:

The BZ-2RQ18 is obsolete. The ZE-Q22-2 is active production status, supporting long-term availability and supply chain stability for new designs or ongoing production requirements.

Frequently Asked Questions (FAQ)

Q: Can the ZE-Q22-2 directly replace the BZ-2RQ18 without any modifications?

A: No. While the electrical specifications are equivalent, the mounting type differs (panel mount versus chassis mount) and the termination style differs (solder lug versus screw terminal). Physical and electrical connection modifications are required.

Q: What are the critical electrical parameters that must match for substitution?

A: The substitute part must maintain SPDT circuit configuration, On-Mom switch function, 15A AC current rating, 500mA DC current rating, 125V AC voltage rating, and 125V DC voltage rating. The differential travel specification of 0.002" (0.05mm) must also be preserved.

Q: Does the ZE-Q22-2 work in applications requiring temperatures below -10°C?

A: No. The ZE-Q22-2 operating temperature range is -10°C to 80°C. Applications requiring operation at -55°C must use the BZ-2RQ18 or identify alternative components rated for extended low-temperature operation.

Q: Is the ZE-Q22-2 suitable for high-cycle applications?

A: The ZE-Q22-2 is rated for 10,000,000 mechanical cycles. Applications requiring operation beyond this cycle count should use the BZ-2RQ18, which is rated for 20,000,000 cycles, or identify components with higher cycle ratings.

Q: Are both parts RoHS compliant?

A: Yes. The BZ-2RQ18 is RoHS Compliant. The ZE-Q22-2 is ROHS3 Compliant. Both meet RoHS regulatory requirements. The ZE-Q22-2 additionally carries REACH Affected status, indicating compliance with additional European chemical regulations.

Q: What is the difference between panel mount and chassis mount configurations?

A: Panel mount (BZ-2RQ18) is designed for installation through an opening in a control panel or enclosure wall. Chassis mount (ZE-Q22-2) is designed for installation on an internal chassis or circuit board structure. These mounting types require different mechanical interfaces and cannot be interchanged without redesign.

Q: What termination style differences exist between these parts?

A: The BZ-2RQ18 uses solder lug termination, requiring soldering to circuit board traces or wire connections. The ZE-Q22-2 uses screw terminal termination, requiring mechanical fastening of conductors. Substitution requires modification of electrical connection methodology.

Q: Can the BZ-2RQ18 be used as a substitute for the ZE-Q22-2?

A: The BZ-2RQ18 meets all electrical requirements of the ZE-Q22-2 and exceeds performance specifications in operating temperature range and mechanical life. However, the panel mount configuration and solder lug termination differ from the chassis mount and screw terminal design of the ZE-Q22-2, requiring mechanical and electrical redesign.