Honeywell BZ-2R389-A2 Snap Action Switch: Equivalent & Substitute Parts

Part Overview

The Honeywell BZ-2R389-A2 is an SPDT snap action switch rated for 15A at 125V AC and 500mA at 125V DC. This chassis-mounted switch features a round pin plunger actuator with screw terminal connections and is designed for on-momentary switching applications. The part is currently active in production with 793 units in stock. Equivalent and substitute parts are identified based on matching circuit topology, voltage ratings, current capacity, mounting configuration, and termination style to ensure functional interchangeability in target applications.

Substiute Parts

BZ-2R389-A2

Honeywell Sensing and Productivity SolutionsIn Stock: 902BZ-2R389-A2 Datasheet

Current PartRFQ

A-20GV22-B7-K

Omron Automation and SafetyIn Stock: 946A-20GV22-B7-K Datasheet

SimilarRFQ

Z-15GW22-B

Omron Automation and SafetyIn Stock: 3688Z-15GW22-B Datasheet

SimilarRFQ

Z-15GW2277-B7-K

Omron Automation and SafetyIn Stock: 1029Z-15GW2277-B7-K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BZ-2R389-A2 is determined by the following critical parameters:

Primary Matching Criteria:

• Circuit configuration: SPDT topology required
• Switch function: On-momentary operation
• Mounting type: Chassis mount configuration
• Termination style: Screw terminal connections
• Voltage rating: Minimum 125V AC support
• Current capacity: Minimum 15A AC or equivalent DC rating

Secondary Compatibility Factors:

• Operating temperature range overlap with application requirements
• RoHS compliance status for regulatory alignment
• Mechanical life rating sufficient for duty cycle demands
• Packaging format (bulk or tray) based on procurement needs

The three identified substitute parts (A-20GV22-B7-K, Z-15GW22-B, and Z-15GW2277-B7-K) satisfy the primary matching criteria. All are SPDT snap action switches with chassis mount configuration, screw terminals, 125V AC rating, and on-momentary function. Variations in actuator type (lever/roller versus pin plunger), current ratings, and mechanical life are documented in the parameter comparison table for engineering evaluation.

Parameter Comparison

Engineering Selection Recommendations

A-20GV22-B7-K (Omron): This substitute provides higher AC current capacity (20A versus 15A) and improved DC current handling (6A versus 500mA). However, the DC voltage rating is limited to 30V compared to the main part's 125V DC rating. Mechanical life is significantly lower at 1,000,000 cycles versus 20,000,000 cycles. This part is suitable for applications where AC current capacity is the primary requirement and DC voltage does not exceed 30V. RoHS compliance is confirmed. Tray packaging is standard.

Z-15GW22-B (Omron): This substitute matches the AC current rating (15A) and voltage (125V AC) of the main part. DC specifications differ: 6A at 30V versus 500mA at 125V. Mechanical life is 10,000,000 cycles, which is lower than the main part but acceptable for many applications. Operating temperature range is -25°C to 80°C, which is narrower than the main part's -55°C to 85°C range. RoHS3 compliance is confirmed. This part offers the closest electrical match with adequate mechanical durability. Tray packaging is standard.

Z-15GW2277-B7-K (Omron): This substitute also matches the AC current rating (15A) and voltage (125V AC). DC specifications are identical to Z-15GW22-B (6A at 30V). Mechanical life is 10,000,000 cycles. Operating temperature range is -25°C to 80°C. RoHS compliance is confirmed. Bulk packaging matches the main part's packaging format. This variant provides equivalent electrical performance to Z-15GW22-B with different mechanical specifications (operating position and travel distances).

All three substitutes are active products with confirmed RoHS compliance and adequate inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the A-20GV22-B7-K replace the BZ-2R389-A2 in all applications?

A: The A-20GV22-B7-K is suitable only for applications where DC voltage does not exceed 30V. The main part supports 125V DC, while this substitute is limited to 30V DC. Additionally, mechanical life is significantly lower (1,000,000 versus 20,000,000 cycles). Verify DC voltage requirements and duty cycle before substitution.

Q: What is the primary difference between Z-15GW22-B and Z-15GW2277-B7-K?

A: Both parts share identical electrical ratings (15A AC, 6A DC, 125V AC, 30V DC) and mechanical life (10,000,000 cycles). The differences are in mechanical specifications: operating position (1.188" versus 1.625"), pretravel data availability, and differential travel (0.020" versus 0.031"). These differences affect actuator response characteristics and may impact mechanical fit in the application.

Q: Are all substitute parts RoHS compliant?

A: Yes. A-20GV22-B7-K and Z-15GW2277-B7-K are RoHS Compliant. Z-15GW22-B is RoHS3 Compliant. All three meet RoHS requirements for regulatory applications.

Q: What is the impact of the narrower operating temperature range in the Omron substitutes?

A: The main part operates from -55°C to 85°C, while all three Omron substitutes operate from -25°C to 80°C. If the application requires operation below -25°C or above 80°C, the Omron substitutes are not suitable. Verify the application's temperature requirements before substitution.

Q: Does packaging format affect electrical or mechanical performance?

A: No. Packaging format (bulk versus tray) does not affect electrical or mechanical performance. It impacts procurement, handling, and storage logistics only. The main part is supplied in bulk; A-20GV22-B7-K and Z-15GW22-B are supplied in trays; Z-15GW2277-B7-K is supplied in bulk.

Q: Which substitute offers the closest match to the BZ-2R389-A2?

A: Z-15GW22-B and Z-15GW2277-B7-K both match the AC current rating (15A) and voltage (125V AC). The primary trade-off is DC voltage: the main part supports 125V DC, while these substitutes support only 30V DC. Mechanical life is lower (10,000,000 versus 20,000,000 cycles). Operating temperature range is narrower (-25°C to 80°C versus -55°C to 85°C). Select based on specific application requirements for these parameters.

Q: Can the BZ-2R389-A2 be used in place of the substitute parts?

A: Yes, in most cases. The main part's higher mechanical life (20,000,000 cycles), wider operating temperature range (-55°C to 85°C), and higher DC voltage rating (125V) make it compatible with applications designed for the substitutes. However, the main part's pin plunger actuator differs mechanically from the lever/roller actuators in the Omron substitutes, which may affect mechanical fit and actuation force characteristics.