BAF1-2RQ9-RH Equivalent & Substitute Parts

Part Overview

The BAF1-2RQ9-RH is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions. This chassis-mounted switch features a roller plunger actuator with screw terminal connections, rated for 20A AC at 125V and 500mA DC at 125V. The switch operates in an On-Momentary function and is RoHS compliant with MSL 1 rating.

The BAF1-2RQ9-RH carries a "Not For New Designs" product status. This designation indicates that Honeywell has discontinued active development and support for this series. Identifying equivalent substitute parts ensures design continuity, maintains supply chain reliability, and provides access to components with active manufacturer support and updated certifications.

Substiute Parts

BAF1-2RQ9-RH

Honeywell Sensing and Productivity SolutionsIn Stock: 1159BAF1-2RQ9-RH Datasheet

Current PartRFQ

ZE-Q22-2S

Omron Automation and SafetyIn Stock: 1217ZE-Q22-2S Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAF1-2RQ9-RH is determined by strict alignment of the following critical parameters:

Electrical Compatibility Requirements:

• Circuit configuration must be SPDT
• Switch function must be On-Momentary
• Voltage ratings must support 125V AC and 125V DC operation
• Current rating must meet or exceed the application requirement (20A AC minimum for direct substitution)

Mechanical Compatibility Requirements:

• Actuator type must be Roller Plunger
• Mounting type must be Chassis Mount
• Termination style must be Screw Terminal

Regulatory & Environmental Requirements:

• RoHS compliance status must be maintained
• Moisture sensitivity level must be MSL 1 or better
• Operating temperature range must encompass the application environment

The ZE-Q22-2S manufactured by Omron Automation and Safety meets the core electrical circuit, mechanical mounting, and regulatory requirements. However, the current rating differential (15A AC versus 20A AC) represents a functional limitation that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The ZE-Q22-2S is electrically and mechanically compatible with the BAF1-2RQ9-RH for applications where the AC current requirement does not exceed 15A. Both components maintain RoHS compliance and MSL 1 moisture sensitivity ratings, ensuring regulatory alignment.

Key Considerations:

1. Current Rating Differential: The BAF1-2RQ9-RH is rated for 20A AC, while the ZE-Q22-2S is rated for 15A AC. Applications drawing between 15A and 20A AC cannot use the substitute without exceeding its electrical specification.

2. Operating Temperature Range: The BAF1-2RQ9-RH operates from -32°C to 71°C, while the ZE-Q22-2S operates from -10°C to 80°C. Applications requiring operation below -10°C cannot use the substitute.

3. Product Status: The ZE-Q22-2S carries an "Active" product status with established manufacturer support, electrical life rating of 500,000 cycles, and mechanical life rating of 10,000,000 cycles. The BAF1-2RQ9-RH "Not For New Designs" status indicates discontinued development.

4. Ingress Protection: The ZE-Q22-2S provides IP60 dust-tight protection, exceeding the BAF1-2RQ9-RH specification.

Selection Criteria:

• Select ZE-Q22-2S when application AC current is ≤15A, operating temperature is ≥-10°C, and active manufacturer support is required.
• Retain BAF1-2RQ9-RH only when application current exceeds 15A AC or operating temperature falls below -10°C.

Frequently Asked Questions (FAQ)

Q: Can the ZE-Q22-2S directly replace the BAF1-2RQ9-RH in all applications?

A: No. The ZE-Q22-2S has a lower AC current rating (15A versus 20A). Direct substitution is only valid for applications where the actual AC current draw does not exceed 15A. Applications requiring 15A to 20A AC operation must retain the BAF1-2RQ9-RH or identify an alternative substitute with matching current specifications.

Q: What is the significance of the "Not For New Designs" status on the BAF1-2RQ9-RH?

A: This designation indicates that Honeywell has discontinued active development, manufacturing optimization, and technical support for the BAF1 series. New designs should transition to actively supported alternatives. Existing designs may continue using BAF1-2RQ9-RH stock, but long-term supply availability is not guaranteed.

Q: Are both switches RoHS compliant?

A: Yes. Both the BAF1-2RQ9-RH and ZE-Q22-2S are RoHS compliant with MSL 1 (Unlimited) moisture sensitivity ratings, meeting current regulatory requirements for electronic component manufacturing.

Q: How do the operating temperature ranges differ?

A: The BAF1-2RQ9-RH operates from -32°C to 71°C, while the ZE-Q22-2S operates from -10°C to 80°C. The substitute has a narrower low-temperature range but extends the upper temperature limit. Applications requiring operation below -10°C cannot use the ZE-Q22-2S.

Q: What is the difference in mechanical life between these switches?

A: The BAF1-2RQ9-RH does not specify mechanical life in the provided data. The ZE-Q22-2S specifies 10,000,000 cycles mechanical life and 500,000 cycles electrical life, providing documented reliability metrics for design validation.

Q: Are the screw terminal connections compatible between these switches?

A: Both switches use screw terminal connections and are chassis-mounted with identical circuit configurations (SPDT). Terminal compatibility is maintained, allowing direct wiring substitution when electrical ratings are satisfied.

Q: What is the IP60 ingress protection rating on the ZE-Q22-2S?

A: IP60 indicates dust-tight protection. The switch is protected against dust ingress and water spray from any direction. The BAF1-2RQ9-RH does not specify an ingress protection rating, making the ZE-Q22-2S suitable for applications requiring enhanced environmental protection.