BAF1-2RN18-RH Equivalent & Substitute Parts

Part Overview

The BAF1-2RN18-RH is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions. This chassis mount switch is rated for 20A AC at 125V and features a spring-coil actuator with screw terminal connections. The product is designated as Not For New Designs, indicating it has been superseded in Honeywell's current product portfolio. Identifying equivalent substitute parts is necessary for applications requiring continued support or where design flexibility permits component selection from active product lines.

Substiute Parts

BAF1-2RN18-RH

Honeywell Sensing and Productivity SolutionsIn Stock: 952BAF1-2RN18-RH Datasheet

Current PartRFQ

ZE-NJ-2S

Omron Automation and SafetyIn Stock: 1253ZE-NJ-2S Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAF1-2RN18-RH is evaluated based on the following critical parameters that must align for functional equivalence:

Primary Matching Criteria:

• Circuit configuration: SPDT
• Switch function: On-Momentary
• Mounting type: Chassis Mount
• Termination style: Screw Terminal
• Voltage rating: 125V AC minimum
• Actuator type: Spring-coil mechanism

Secondary Compatibility Factors:

• Current rating: Substitute must support minimum 15A AC (BAF1-2RN18-RH rated 20A AC)
• Operating temperature range: Substitute must cover or exceed the application temperature window
• Regulatory compliance: RoHS and REACH status for supply chain requirements

The ZE-NJ-2S from Omron Automation and Safety meets the primary matching criteria with SPDT configuration, on-momentary function, chassis mount design, and screw terminal termination. The substitute operates at 125V AC and 125V DC, matching the voltage specifications. Current rating of 15A AC is lower than the original 20A AC specification but remains within acceptable substitution parameters for applications not requiring the full 20A capacity.

Parameter Comparison

Engineering Selection Recommendations

BAF1-2RN18-RH Selection: The original Honeywell BAF1-2RN18-RH is designated Not For New Designs. This status indicates the manufacturer has discontinued active support and development for this model. Existing inventory of 869 pieces is available, making this part suitable only for legacy system maintenance or repair applications where design changes are not feasible.

ZE-NJ-2S Selection: The Omron ZE-NJ-2S is an active product with 1,162 pieces in stock. This substitute meets all primary functional requirements: SPDT circuit, on-momentary operation, 125V AC/DC ratings, chassis mount configuration, and screw terminal termination. The ZE-NJ-2S provides additional engineering benefits including IP65 ingress protection rating and extended upper operating temperature limit (80°C versus 71°C). Both parts maintain RoHS compliance and share identical pretravel specifications (15°).

Current Rating Consideration: The ZE-NJ-2S is rated for 15A AC compared to the BAF1-2RN18-RH's 20A AC rating. Applications drawing less than 15A AC can use the substitute without derating. Applications requiring the full 20A AC capacity must retain the original BAF1-2RN18-RH or identify alternative substitutes with higher current ratings.

Regulatory Compliance: Both parts are RoHS compliant. The ZE-NJ-2S carries ROHS3 compliance (current standard) versus RoHS compliance for the BAF1-2RN18-RH. The ZE-NJ-2S is REACH Affected, while the BAF1-2RN18-RH is REACH Unaffected. Supply chain and regulatory requirements should be evaluated based on end-use application and regional restrictions.

Frequently Asked Questions (FAQ)

Q: Can the ZE-NJ-2S directly replace the BAF1-2RN18-RH in all applications?

A: Direct replacement is possible for applications where the current requirement does not exceed 15A AC. The ZE-NJ-2S maintains identical circuit configuration (SPDT), switch function (on-momentary), voltage ratings (125V AC/DC), mounting type (chassis mount), and termination style (screw terminal). Applications requiring 15A to 20A AC must evaluate whether the lower current rating of the substitute is acceptable for the specific load.

Q: What are the key differences between these two switches?

A: The primary differences are current rating (20A AC versus 15A AC), product status (Not For New Designs versus Active), ingress protection (unspecified versus IP65), and operating temperature upper limit (71°C versus 80°C). Both switches share identical pretravel (15°), voltage ratings (125V AC/DC), and termination style (screw terminal).

Q: Is the ZE-NJ-2S suitable for new designs?

A: Yes. The ZE-NJ-2S is an active product from Omron Automation and Safety with current manufacturing support. The BAF1-2RN18-RH is designated Not For New Designs, making the ZE-NJ-2S the appropriate choice for new product development requiring SPDT snap action switches with these specifications.

Q: How do the operating temperature ranges compare?

A: The BAF1-2RN18-RH operates from -32°C to 71°C. The ZE-NJ-2S operates from -10°C to 80°C. The ZE-NJ-2S provides a higher upper temperature limit (80°C) but a higher lower temperature limit (-10°C versus -32°C). Applications requiring operation below -10°C must use the BAF1-2RN18-RH.

Q: What does the IP65 rating on the ZE-NJ-2S provide?

A: IP65 indicates the switch is dust tight and water resistant. The BAF1-2RN18-RH does not specify an ingress protection rating. Applications requiring environmental sealing or washdown resistance benefit from the ZE-NJ-2S's IP65 rating.

Q: Are both switches RoHS compliant?

A: Yes. The BAF1-2RN18-RH is RoHS Compliant. The ZE-NJ-2S is ROHS3 Compliant (the current RoHS standard). Both parts meet RoHS requirements. The ZE-NJ-2S is REACH Affected, while the BAF1-2RN18-RH is REACH Unaffected. Verify REACH compliance requirements for your specific application and supply chain.

Q: What is the pretravel specification and does it match between parts?

A: Pretravel is the distance the actuator travels before electrical contact occurs. Both the BAF1-2RN18-RH and ZE-NJ-2S have identical pretravel specifications of 15°, ensuring consistent actuation behavior in applications where this parameter is critical.