BAF1-2RN-LH Equivalent & Substitute Parts

Part Overview

The BAF1-2RN-LH is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions, designed for chassis mount applications with screw terminal connections. This switch is rated for 20A AC at 125V and features a round pin plunger actuator mounted on the left side. The product is classified as "Not For New Designs," indicating it has been superseded in Honeywell's current product portfolio.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 alternatives that meet the same electrical and mechanical specifications.

Substiute Parts

BAF1-2RN-LH

Honeywell Sensing and Productivity SolutionsIn Stock: 20209BAF1-2RN-LH Datasheet

Current PartRFQ

ZE-N-2S

Omron Automation and SafetyIn Stock: 35458ZE-N-2S Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BAF1-2RN-LH is determined by the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration must be SPDT
• Switch function must be On-Momentary
• Voltage rating must support 125V AC and 125V DC minimum
• Actuator type must be round pin plunger
• Mounting type must be chassis mount
• Termination style must be screw terminal

Secondary Consideration:

• Current rating: The BAF1-2RN-LH is rated for 20A AC. Substitute parts with lower AC current ratings (such as 15A) may be considered for applications where the actual load current does not exceed the substitute's rating.

The Omron ZE-N-2S meets all primary compatibility criteria with the exception of AC current rating (15A versus 20A). This difference is significant and must be evaluated against actual application requirements.

Parameter Comparison

Engineering Selection Recommendations

BAF1-2RN-LH (Honeywell): The BAF1-2RN-LH is classified as "Not For New Designs," indicating it is obsolete in Honeywell's current product line. This part should be used only for replacement or maintenance of existing equipment. RoHS compliance is confirmed.

ZE-N-2S (Omron Automation and Safety): The ZE-N-2S is an active product with current manufacturer support. It meets all primary electrical and mechanical compatibility criteria with the BAF1-2RN-LH. The key difference is the AC current rating: 15A versus 20A. Selection of the ZE-N-2S is appropriate only when the application's actual AC load current does not exceed 15A. The ZE-N-2S provides additional benefits including IP65 ingress protection and an extended upper operating temperature limit (80°C versus 71°C). ROHS3 compliance and REACH Affected status indicate current regulatory alignment.

For applications requiring the full 20A AC rating of the BAF1-2RN-LH, the ZE-N-2S is not suitable as a direct substitute.

Frequently Asked Questions (FAQ)

Q: Can the ZE-N-2S replace the BAF1-2RN-LH in all applications?

A: No. The ZE-N-2S has a 15A AC current rating compared to the BAF1-2RN-LH's 20A AC rating. Substitution is valid only when the application's actual AC load current does not exceed 15A. If the application requires the full 20A capacity, the ZE-N-2S is not suitable.

Q: What are the key compatibility requirements for substituting these switches?

A: Both switches must maintain SPDT circuit configuration, On-Momentary function, 125V AC/DC voltage rating, round pin plunger actuator, chassis mount configuration, and screw terminal termination. These parameters are non-negotiable for mechanical and electrical compatibility.

Q: Does the ZE-N-2S offer any advantages over the BAF1-2RN-LH?

A: Yes. The ZE-N-2S is an active product with current manufacturer support, includes IP65 ingress protection, supports an extended operating temperature range (-10°C to 80°C), and carries ROHS3 compliance. The BAF1-2RN-LH is obsolete and no longer recommended for new designs.

Q: Are there packaging or inventory considerations?

A: Both parts are available in bulk packaging. The BAF1-2RN-LH has 20,199 pieces in stock, while the ZE-N-2S has 35,397 pieces available. Availability should be confirmed with the supplier before design decisions.

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

A: The BAF1-2RN-LH operates from -32°C to 71°C, while the ZE-N-2S operates from -10°C to 80°C. For applications requiring operation below -10°C, the BAF1-2RN-LH is required. For applications requiring operation above 71°C, the ZE-N-2S is required. For applications within the overlapping range (-10°C to 71°C), both are suitable.

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

A: This designation indicates the part is obsolete and has been superseded in the manufacturer's current product portfolio. It should be used only for maintenance or replacement of existing equipment. New equipment designs should not incorporate this part.