Equivalent & Substitute Parts for BZ-2RD-A2

Part Overview

The BZ-2RD-A2 is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions. This chassis mount switch is rated for 15A AC at 125V and features a round pin plunger actuator with screw terminal connections. The part is currently active in production with 16,000 units in stock.

Substitute parts become necessary when the BZ-2RD-A2 reaches end-of-life status, when inventory becomes depleted, or when alternative sourcing is required for supply chain continuity. The substitute parts listed maintain electrical and mechanical compatibility within defined parameter ranges.

Substiute Parts

BZ-2RD-A2

Honeywell Sensing and Productivity SolutionsIn Stock: 16096BZ-2RD-A2 Datasheet

Current PartRFQ

BZ-2RD42-P4

Honeywell Sensing and Productivity SolutionsIn Stock: 884BZ-2RD42-P4 Datasheet

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A-20G-B

Omron Automation and SafetyIn Stock: 831A-20G-B Datasheet

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Z-15E-B

Omron Automation and SafetyIn Stock: 938Z-15E-B Datasheet

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Z-15GD55-B

Omron Automation and SafetyIn Stock: 392146Z-15GD55-B Datasheet

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Z-15GS55-B

Omron Automation and SafetyIn Stock: 1187Z-15GS55-B Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following parameters:

Primary Compatibility Criteria:

• Circuit configuration must be SPDT
• Switch function must be On-Momentary
• Actuator type must be Round Pin Plunger
• Mounting type must be Chassis Mount
• Termination style must be Screw Terminal
• AC voltage rating must be 125V minimum
• AC current rating must be 15A minimum

Secondary Consideration Parameters:

• Operating temperature range (minimum -55°C, maximum 85°C preferred)
• Mechanical life rating (20,000,000 cycles preferred)
• RoHS compliance status
• Moisture sensitivity level

The substitute parts listed meet all primary compatibility criteria. Variations in secondary parameters are noted in the comparison table below.

Parameter Comparison

Engineering Selection Recommendations

BZ-2RD42-P4 (Honeywell): This part is electrically and mechanically identical to the BZ-2RD-A2 with matching current ratings, voltage ratings, operating temperature range, and mechanical life. However, this part carries an Obsolete product status. Selection of this substitute is not recommended for new designs or long-term applications due to discontinued production status.

Z-15GD55-B (Omron): This part meets all primary compatibility criteria with 15A AC at 125V rating and 20,000,000 cycle mechanical life matching the BZ-2RD-A2. The part is Active in production with substantial inventory (392,105 units). DC voltage rating is reduced to 30V. Ingress protection rating of IP62 provides enhanced environmental sealing. ROHS3 compliance is current. This part is suitable for AC-dominant applications.

Z-15E-B (Omron): This part meets primary compatibility criteria with 15A AC at 125V rating. However, mechanical life is rated at only 300,000 cycles, significantly lower than the BZ-2RD-A2 specification of 20,000,000 cycles. Electrical life is 100,000 cycles. This part is not recommended for high-cycle applications.

A-20G-B (Omron): This part exceeds the primary current specification with 20A AC rating at 125V. All other primary criteria are met. Mechanical life is 1,000,000 cycles, lower than the BZ-2RD-A2. DC voltage rating is 30V. This part is suitable for applications requiring higher AC current capacity.

Z-15GS55-B (Omron): This part meets all primary compatibility criteria with 15A AC at 125V rating and 20,000,000 cycle mechanical life. The part is Active in production. DC voltage rating is 30V. Ingress protection rating of IP62 provides enhanced environmental sealing. ROHS3 compliance is current. This part is suitable for general replacement applications.

Frequently Asked Questions (FAQ)

Q: Can the BZ-2RD-A2 be directly replaced with any of these substitute parts?

A: Direct replacement depends on application requirements. All listed substitutes maintain SPDT circuit configuration, On-Momentary function, round pin plunger actuator, chassis mount, and screw terminal specifications. However, DC voltage ratings differ. The BZ-2RD-A2 is rated 125V DC, while Omron substitutes are rated 30V DC. Applications using DC voltages above 30V require the BZ-2RD-A2 or BZ-2RD42-P4.

Q: What is the difference between the Honeywell and Omron substitute options?

A: Honeywell BZ-2RD42-P4 is electrically identical to the BZ-2RD-A2 but is Obsolete. Omron parts (Z-15GD55-B, Z-15E-B, A-20G-B, Z-15GS55-B) are all Active in production. Omron parts feature ROHS3 compliance and enhanced ingress protection ratings (IP62 for Z-15GD55-B and Z-15GS55-B). Mechanical life varies among Omron options.

Q: Which substitute part has the longest mechanical life?

A: Z-15GD55-B and Z-15GS55-B both offer 20,000,000 cycle mechanical life, matching the BZ-2RD-A2 specification. Z-15E-B provides only 300,000 cycles, and A-20G-B provides 1,000,000 cycles.

Q: Are there packaging differences between these parts?

A: Yes. BZ-2RD-A2 and Z-15E-B are supplied in Bulk packaging. Z-15GD55-B and Z-15GS55-B are supplied in Tray packaging. Packaging selection may affect handling, storage, and assembly processes.

Q: What is the operating temperature range limitation?

A: BZ-2RD-A2 operates from -55°C to 85°C. All Omron substitutes operate from -15°C to 80°C or -25°C to 80°C, providing a narrower low-temperature range. Applications requiring operation below -15°C require the BZ-2RD-A2 or BZ-2RD42-P4.

Q: Can the A-20G-B be used in place of the BZ-2RD-A2?

A: The A-20G-B provides higher AC current capacity (20A versus 15A) and meets all primary compatibility criteria. However, mechanical life is reduced to 1,000,000 cycles. This part is suitable for applications where higher current capacity is beneficial and lower cycle life is acceptable.

Q: What does IP62 ingress protection mean?

A: IP62 rating indicates protection against water jets from any direction and dust ingress. Z-15GD55-B and Z-15GS55-B with IP62 rating are suitable for applications with moisture or dust exposure. BZ-2RD-A2 and Z-15E-B with no specified ingress protection are suitable for dry environments.

Q: Which substitute part has the best current inventory availability?

A: Z-15GD55-B has the highest inventory with 392,105 units in stock, followed by Z-15GS55-B with 1,136 units. BZ-2RD42-P4 has limited inventory at 838 units and is Obsolete.