BAF1-2RN2-LH Equivalent & Substitute Parts

Part Overview

The BAF1-2RN2-LH is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions. This chassis mount switch is rated for 20A AC at 125V with a lever roller actuator and screw terminal connections. The product is designated as Not For New Designs, indicating it has been superseded in Honeywell's current product portfolio. Finding equivalent substitute parts is necessary for applications requiring continued support, maintenance, or where design flexibility permits component selection from active product lines.

Substiute Parts

BAF1-2RN2-LH

Honeywell Sensing and Productivity SolutionsIn Stock: 912BAF1-2RN2-LH Datasheet

Current PartRFQ

ZE-NA2-2S

Omron Automation and SafetyIn Stock: 1124ZE-NA2-2S Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAF1-2RN2-LH is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Circuit configuration must be SPDT
• Switch function must be On-Momentary
• Voltage rating must support 125V AC and 125V DC operation
• Current rating must meet or exceed 20A AC requirement

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 footprint

Environmental & Compliance Requirements:

• Operating temperature range must encompass -32°C to 71°C
• RoHS compliance status must be verified

The ZE-NA2-2S from Omron Automation and Safety meets the core electrical circuit requirements (SPDT, On-Momentary, 125V AC/DC) and mechanical interface specifications (lever roller actuator, chassis mount, screw terminal). However, the current rating differential and operating temperature range variance require engineering evaluation for specific applications.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The ZE-NA2-2S is electrically and mechanically compatible with the BAF1-2RN2-LH for applications where the following conditions are satisfied:

1. Current Requirement: The application current draw does not exceed 15A AC at 125V. If the application requires the full 20A AC rating of the original BAF1-2RN2-LH, the ZE-NA2-2S is not suitable as a direct substitute.

2. Temperature Environment: The application operating environment remains within -10°C to 80°C. If operation below -10°C is required, the ZE-NA2-2S does not meet the original specification range.

3. Actuator Force Profile: The reduced operating force (640gf vs. 907gf) of the ZE-NA2-2S is acceptable for the intended actuation mechanism.

4. Compliance Status: The ZE-NA2-2S carries ROHS3 compliance and REACH Affected designation, meeting current regulatory requirements. The BAF1-2RN2-LH is RoHS Compliant but carries a Not For New Designs status.

5. Environmental Protection: The ZE-NA2-2S provides IP65 ingress protection, offering superior environmental sealing compared to the unspecified protection level of the BAF1-2RN2-LH.

Recommendation Basis:

Selection of the ZE-NA2-2S should be based on verification that application current requirements do not exceed 15A AC and that the operating temperature minimum of -10°C is acceptable. The substitute part offers the advantage of active product status and enhanced environmental protection specifications.

Frequently Asked Questions (FAQ)

Q: Can the ZE-NA2-2S directly replace the BAF1-2RN2-LH in all applications?

A: No. The ZE-NA2-2S has a maximum AC current rating of 15A compared to the BAF1-2RN2-LH's 20A rating. Substitution is valid only for applications where the actual current draw does not exceed 15A AC at 125V.

Q: What is the significance of the operating force difference between these parts?

A: The BAF1-2RN2-LH requires 907gf operating force while the ZE-NA2-2S requires 640gf. This 29% reduction in required force means the substitute part will actuate with less mechanical input. This difference is acceptable if the application's actuation mechanism can accommodate the lower force threshold.

Q: Are there temperature limitations with the ZE-NA2-2S?

A: Yes. The ZE-NA2-2S operates from -10°C to 80°C, whereas the BAF1-2RN2-LH operates from -32°C to 71°C. The substitute part cannot be used in applications requiring operation below -10°C. The upper temperature limit of the substitute is 9°C higher, which is not a limitation.

Q: What does "Not For New Designs" mean for the BAF1-2RN2-LH?

A: This designation indicates that Honeywell has discontinued this product for new applications. Existing inventory may be available, but the manufacturer does not recommend this part for new product development. The ZE-NA2-2S, being an Active product from Omron, is suitable for new designs within its specified parameters.

Q: How do the pretravel specifications affect substitution?

A: Pretravel is the distance the actuator moves before electrical contact occurs. The BAF1-2RN2-LH has 0.219" pretravel while the ZE-NA2-2S has 0.197" pretravel. This 10% difference may affect the feel and response characteristics of the switch but does not prevent substitution if the application tolerates this variation.

Q: What is the significance of IP65 rating on the ZE-NA2-2S?

A: IP65 means the ZE-NA2-2S is dust tight and water resistant. The BAF1-2RN2-LH does not specify an ingress protection rating. If the application requires environmental sealing, the ZE-NA2-2S provides this capability as an added benefit.

Q: Are both parts RoHS compliant?

A: Yes. The BAF1-2RN2-LH is RoHS Compliant. The ZE-NA2-2S is ROHS3 Compliant, which represents the current RoHS standard. Both parts meet RoHS requirements, though the Omron part meets the more recent standard revision.

Q: What packaging is available for these parts?

A: Both the BAF1-2RN2-LH and ZE-NA2-2S are available in Bulk packaging. The BAF1-2RN2-LH has 881 pieces in stock, while the ZE-NA2-2S has 1092 pieces in stock.