BZ-2R258 Equivalent & Substitute Parts Reference

Part Overview

The BZ-2R258 is an SPDT snap action switch manufactured by Honeywell Sensing and Productivity Solutions, designed for chassis mount applications with screw terminal connections. This switch is rated for 15A AC at 125V and 500mA DC at 125V, featuring a round pin plunger actuator and on-momentary switch function. The product maintains active status with 631 units in current inventory. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and circuit configuration requirements necessitate alternative sourcing due to availability, lead time, or supply chain considerations.

Substiute Parts

BZ-2R258

Honeywell Sensing and Productivity SolutionsIn Stock: 726BZ-2R258 Datasheet

Current PartRFQ

Z-15G55

Omron Automation and SafetyIn Stock: 981Z-15G55 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BZ-2R258 is determined by strict alignment of the following critical parameters:

Primary Electrical Criteria:

• Circuit configuration must be SPDT
• Switch function must be On-Mom
• AC current rating must support minimum 15A at 125V
• DC voltage rating must support minimum 125V operation

Primary Mechanical Criteria:

• Actuator type must be Round (Pin Plunger)
• Mounting type must be Chassis Mount
• Operating position must be 0.625" (15.9mm)
• Mechanical life must meet or exceed 20,000,000 cycles

Secondary Compatibility Factors:

• Termination style compatibility with circuit board or harness design
• Operating temperature range must encompass application requirements
• RoHS compliance status for regulatory alignment

The substitute part Z-15G55 (Omron Automation and Safety) meets the primary electrical circuit requirements (SPDT, On-Mom function) and mechanical mounting specifications (chassis mount, round pin plunger, 0.625" operating position, 20,000,000 cycle life). However, specific parameter deviations exist in current ratings, voltage ratings, and termination style that require engineering evaluation for application-specific compatibility.

Parameter Comparison

Engineering Selection Recommendations

BZ-2R258 (Honeywell) - Primary Selection: Select the BZ-2R258 when the application requires DC voltage operation at 125V, operates in temperature ranges below -15°C, or when screw terminal connections are specified in the circuit design. This part maintains active product status with established supply inventory (631 units). RoHS compliance is confirmed. The wider operating temperature range (-55°C to 85°C) accommodates extended environmental specifications.

Z-15G55 (Omron) - Conditional Substitute: The Z-15G55 functions as a substitute only when all of the following conditions are met:

• Application operates at DC voltages not exceeding 30V
• Operating temperature range remains between -15°C and 80°C
• Solder lug termination is compatible with circuit board design or harness assembly
• Higher operating force (430gf versus 255-368gf) is acceptable for the actuator mechanism

Both parts maintain equivalent mechanical life (20,000,000 cycles), SPDT circuit configuration, and on-momentary switch function. Compliance certifications (RoHS/ROHS3) are current for both manufacturers. The Z-15G55 provides higher DC current capacity (6A versus 500mA), which may benefit applications requiring increased DC switching capability within the 30V DC limitation.

Frequently Asked Questions (FAQ)

Q: Can Z-15G55 replace BZ-2R258 in all applications?

A: No. The Z-15G55 has a maximum DC voltage rating of 30V, while the BZ-2R258 supports 125V DC. If your application requires 125V DC operation, the BZ-2R258 is the only suitable choice from this comparison. Additionally, the Z-15G55 operates only to -15°C minimum, whereas the BZ-2R258 functions to -55°C.

Q: What is the primary difference between these switches?

A: Both switches share identical SPDT circuit configuration, on-momentary function, 15A AC rating, and mechanical life specifications. The key differences are: (1) DC voltage rating (BZ-2R258: 125V; Z-15G55: 30V), (2) termination style (BZ-2R258: screw terminal; Z-15G55: solder lug), (3) operating force (BZ-2R258: 255-368gf; Z-15G55: 430gf), and (4) temperature range (BZ-2R258: -55°C to 85°C; Z-15G55: -15°C to 80°C).

Q: Are both switches RoHS compliant?

A: Yes. The BZ-2R258 is RoHS Compliant, and the Z-15G55 is ROHS3 Compliant. Both meet current environmental and hazardous substance restrictions for electronic components.

Q: What does the termination style difference mean for my design?

A: The BZ-2R258 uses screw terminals, which require mechanical fastening to circuit connections. The Z-15G55 uses solder lugs, which require soldering to circuit board pads or wire connections. These are not directly interchangeable without circuit redesign or adapter hardware.

Q: Which switch should I use for low-temperature applications?

A: The BZ-2R258 is rated to -55°C, making it suitable for low-temperature environments. The Z-15G55 is only rated to -15°C minimum. For applications below -15°C, the BZ-2R258 is the required choice.

Q: Can I use Z-15G55 if my application only uses DC at 12V?

A: Yes, provided all other application parameters align. At 12V DC, the Z-15G55 operates within its 30V DC rating. However, verify that the operating temperature range (-15°C to 80°C), higher operating force (430gf), and solder lug termination are compatible with your circuit design and assembly process.

Q: What is the inventory status for each part?

A: The BZ-2R258 has 631 units in current inventory. The Z-15G55 has 879 units in current inventory. Both parts are listed as active products with new original stock available.