BAF1-2RN28-RH Equivalent & Substitute Parts

Part Overview

The BAF1-2RN28-RH is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions. This chassis-mounted switch is rated for 20A AC at 125V and features a lever roller actuator with right-side mounting. The switch operates in On-Momentary function and is designed for applications requiring reliable snap action switching with screw terminal connections.

Substitute parts are identified when equivalent electrical ratings, mechanical configurations, and operational characteristics align with the original specification, enabling direct replacement in compatible applications.

Substiute Parts

BAF1-2RN28-RH

Honeywell Sensing and Productivity SolutionsIn Stock: 888BAF1-2RN28-RH Datasheet

Current PartRFQ

ZE-NA277-2S

Omron Automation and SafetyIn Stock: 737ZE-NA277-2S Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BAF1-2RN28-RH is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Circuit configuration must be SPDT
• Switch function must be On-Momentary
• Voltage ratings must meet or exceed 125V AC and 125V DC
• Current rating must support the application load

Mechanical Compatibility Requirements:

• Actuator type must be lever with roller configuration
• Mounting type must be chassis mount
• Termination style must be screw terminal
• Physical dimensions must accommodate existing mounting interfaces

Environmental & Compliance Requirements:

• Operating temperature range must encompass application conditions
• RoHS compliance status must be maintained
• Moisture sensitivity level must be compatible with storage and handling

The substitute part ZE-NA277-2S meets the circuit, function, voltage, actuator, mounting, and termination requirements. Current rating differences and operating temperature range variations are documented in the parameter comparison table below.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (BAF1-2RN28-RH): Select the BAF1-2RN28-RH when applications require 20A AC switching capacity at 125V with the specified operating force and travel characteristics. This part maintains active product status and RoHS compliance. Use when operating temperature requirements fall within the -32°C to 71°C range and the original equipment design specifies Honeywell components.

Substitute Part Selection (ZE-NA277-2S): The ZE-NA277-2S from Omron Automation and Safety is suitable as a substitute when the following conditions are met:

• Application current requirement does not exceed 15A AC at 125V
• Operating temperature range is between -10°C and 80°C
• Lower actuation force (640gf versus 907gf) is acceptable for the application
• Enhanced ingress protection (IP65) is beneficial or required
• Documented electrical life (500,000 cycles) and mechanical life (10,000,000 cycles) ratings meet application durability requirements

Both parts maintain RoHS compliance and active product status. The substitute part provides additional environmental protection through IP65 rating and documented lifecycle specifications not provided for the primary part.

Frequently Asked Questions (FAQ)

Q: Can the ZE-NA277-2S directly replace the BAF1-2RN28-RH in all applications?

A: Direct replacement is possible only when the application current requirement does not exceed 15A AC. The BAF1-2RN28-RH is rated for 20A AC, while the ZE-NA277-2S is rated for 15A AC. Applications drawing more than 15A AC require the original BAF1-2RN28-RH or an alternative rated for 20A AC.

Q: What is the significance of the different operating forces?

A: The BAF1-2RN28-RH requires 907gf operating force, while the ZE-NA277-2S requires 640gf. This difference affects actuator design and user interface feel. Applications with mechanical linkages or specific force requirements must account for this 267gf difference.

Q: How do the pretravel and overtravel differences affect compatibility?

A: The BAF1-2RN28-RH has pretravel of 0.219" (5.6mm) and overtravel of 0.250" (6.35mm). The ZE-NA277-2S has pretravel of 0.197" (5.0mm) and overtravel of 0.235" (6.0mm). These mechanical differences may affect switch response timing and mechanical clearance requirements in the application. Verify that the application accommodates these dimensional variations.

Q: What is the impact of the operating temperature range difference?

A: The BAF1-2RN28-RH operates from -32°C to 71°C, while the ZE-NA277-2S operates from -10°C to 80°C. The substitute part cannot be used in applications requiring operation below -10°C. However, it supports higher temperature operation up to 80°C. Select based on the actual operating environment.

Q: Does the IP65 rating on the ZE-NA277-2S provide an advantage?

A: Yes. The ZE-NA277-2S includes IP65 ingress protection (dust tight, water resistant), while the BAF1-2RN28-RH does not specify ingress protection. In applications exposed to moisture, dust, or washdown environments, the ZE-NA277-2S provides enhanced environmental protection.

Q: Are the electrical and mechanical life ratings important for substitution?

A: The ZE-NA277-2S provides documented electrical life (500,000 cycles) and mechanical life (10,000,000 cycles). The BAF1-2RN28-RH does not specify these values. For applications requiring known lifecycle specifications or high-cycle reliability, the documented ratings of the ZE-NA277-2S provide engineering confidence. Applications with undefined cycle requirements may use either part based on other compatibility factors.

Q: What packaging considerations apply to these parts?

A: The BAF1-2RN28-RH is supplied in unspecified packaging with 857 pieces in stock. The ZE-NA277-2S is supplied in bulk packaging with 675 pieces in stock. Verify packaging requirements for your procurement and assembly processes.