BE-R205 Equivalent & Substitute Parts Reference

Part Overview

The BE-R205 is a snap action switch manufactured by Honeywell Sensing and Productivity Solutions, configured as a single-pole double-throw (SPDT) device with on-momentary function. This chassis-mounted switch is rated for 25A AC at 125V with a round pin plunger actuator and screw terminal connections. The BE-R205 is classified as obsolete, making identification of functionally equivalent substitute components necessary for ongoing maintenance, repair, and new design applications where this switch type is specified.

Substiute Parts

BE-R205

Honeywell Sensing and Productivity SolutionsIn Stock: 923BE-R205 Datasheet

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A-20G

Omron Automation and SafetyIn Stock: 878A-20G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the BE-R205 is determined by the following critical parameters that must align between the main part and substitute candidates:

Primary Substitution Criteria:

• Circuit configuration: SPDT
• Switch function: On-momentary operation
• Actuator type: Round pin plunger
• Mounting type: Chassis mount
• Operating position: 0.640" (16.3mm)

Secondary Compatibility Parameters:

• Voltage rating: 125V AC minimum
• Current rating: Must support application requirements
• Termination compatibility: Screw terminal or solder lug (with mechanical adaptation)
• Operating temperature range: Must encompass application environment
• RoHS compliance status

The A-20G from Omron Automation and Safety meets the primary substitution criteria with identical circuit configuration, switch function, actuator type, mounting type, and operating position. However, the A-20G has a reduced AC current rating of 20A compared to the BE-R205's 25A rating, and features solder lug termination instead of screw terminals. These differences require engineering evaluation based on specific application current demands and termination infrastructure.

Parameter Comparison

Engineering Selection Recommendations

BE-R205 to A-20G Substitution Assessment:

The A-20G qualifies as a functional substitute for the BE-R205 based on matching circuit topology, switch function, actuator geometry, and mounting configuration. Both components are RoHS compliant and maintain the same 125V AC voltage rating and 0.640" operating position.

Limiting Factors for Substitution:

1. Current Rating Reduction: The A-20G AC current rating of 20A is 5A lower than the BE-R205's 25A rating. Substitution is valid only when application current requirements do not exceed 20A AC.

2. Termination Incompatibility: The A-20G uses solder lug termination versus the BE-R205's screw terminal design. Direct mechanical substitution requires termination adapter hardware or circuit board redesign.

3. Temperature Range Limitation: The A-20G operating range (-25°C to 80°C) is narrower than the BE-R205 (-55°C to 85°C). Substitution is restricted to applications within the A-20G's specified temperature envelope.

4. Mechanical Life Differential: The A-20G mechanical life rating of 1,000,000 cycles is significantly lower than the BE-R205's 20,000,000 cycles. Long-cycle-life applications may require alternative candidates.

5. Product Status: The A-20G is active production, ensuring long-term availability and supply chain stability compared to the obsolete BE-R205.

Substitution Validity: The A-20G is suitable as a substitute when application current does not exceed 20A AC, operating temperature remains within -25°C to 80°C, termination adaptation is feasible, and mechanical cycle life requirements do not exceed 1,000,000 cycles.

Frequently Asked Questions (FAQ)

Q: Can the A-20G directly replace the BE-R205 without modifications?

A: Direct mechanical replacement is not possible due to termination style differences. The BE-R205 uses screw terminals while the A-20G uses solder lugs. Circuit board redesign or termination adapters are required.

Q: What is the primary limitation when substituting the A-20G for the BE-R205?

A: The A-20G AC current rating of 20A is 5A lower than the BE-R205's 25A rating. Substitution is valid only for applications drawing 20A AC or less.

Q: Are both switches RoHS compliant?

A: Yes. The BE-R205 is RoHS Compliant, and the A-20G is ROHS3 Compliant, meeting current environmental regulations.

Q: How do the operating temperature ranges compare?

A: The BE-R205 operates from -55°C to 85°C, while the A-20G operates from -25°C to 80°C. The A-20G has a narrower range and is unsuitable for applications requiring operation below -25°C or above 80°C.

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

A: The BE-R205 is rated for 20,000,000 mechanical cycles, while the A-20G is rated for 1,000,000 cycles. Applications requiring extended cycle life may not be suitable for A-20G substitution.

Q: Do both switches have identical actuator and mounting specifications?

A: Yes. Both use round pin plunger actuators, chassis mount configuration, and 0.640" operating position, ensuring mechanical compatibility in mounting applications.

Q: Is the A-20G available in the same packaging as the BE-R205?

A: The A-20G is supplied in bulk packaging, while the BE-R205 packaging specification is not provided. Packaging requirements should be confirmed with procurement specifications.

Q: Can the A-20G be used in DC applications?

A: The A-20G is rated for 6A DC at 30V, providing DC switching capability not specified for the BE-R205. This represents an additional functional capability of the substitute.