BA-2R281-A2 Equivalent & Substitute Parts

Part Overview

The BA-2R281-A2 is a snap action switch manufactured by Honeywell Sensing and Productivity Solutions, configured as a single-pole double-throw (SPDT) device with chassis mount installation. This switch is rated for 20A AC at 125V and 500mA DC at 125V, featuring a round pin plunger actuator and screw terminal connections. The part is classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability for new production and field replacement applications.

Substiute Parts

BA-2R281-A2

Honeywell Sensing and Productivity SolutionsIn Stock: 1247BA-2R281-A2 Datasheet

Current PartRFQ

BA-2R-A2

Honeywell Sensing and Productivity SolutionsIn Stock: 1163BA-2R-A2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BA-2R281-A2 is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part BA-2R-A2 qualifies as a direct equivalent based on the following criteria:

Electrical Parameters (Must Match Exactly):

• Circuit configuration: SPDT
• Switch function: On-Mom
• Current rating: 20A AC, 500mA DC
• Voltage rating: 125V AC and DC

Mechanical Parameters (Must Match Exactly):

• Actuator type: Round (Pin Plunger)
• Mounting type: Chassis Mount
• Termination style: Screw Terminal
• Operating force: 397–624 gf
• Release force: 283 gf
• Operating position: 0.640" (16.3 mm)
• Pretravel: 0.050" (1.27 mm)
• Differential travel: 0.002" (0.05 mm)
• Overtravel: 0.010" (0.25 mm)

Environmental Parameters (Must Match Exactly):

• Operating temperature range: -55°C to 85°C
• Mechanical life: 20,000,000 cycles
• RoHS compliance: Yes
• Moisture sensitivity level: 1 (Unlimited)

The BA-2R-A2 maintains identical specifications across all parameters while offering the advantage of active product status and bulk packaging availability.

Parameter Comparison

Engineering Selection Recommendations

The BA-2R-A2 is the direct equivalent substitute for the obsolete BA-2R281-A2. Selection of the BA-2R-A2 is based on the following engineering factors:

Product Status: The BA-2R-A2 maintains active product status with Honeywell Sensing and Productivity Solutions, ensuring continued availability and manufacturing support. The BA-2R281-A2 is classified as obsolete and subject to discontinuation.

Electrical and Mechanical Equivalence: All electrical parameters, mechanical specifications, and dimensional characteristics are identical between the two parts. The BA-2R-A2 performs the identical switching function with equivalent current and voltage ratings, actuator characteristics, and operational force specifications.

Compliance and Certifications: Both parts maintain RoHS compliance and identical ECCN and HTSUS classifications, ensuring regulatory compatibility in applications requiring environmental and trade compliance.

Packaging Consideration: The BA-2R-A2 is supplied in bulk packaging, whereas the BA-2R281-A2 was supplied with standard packaging. Bulk packaging does not affect electrical or mechanical performance and is suitable for production environments requiring component quantities.

Inventory Availability: The BA-2R-A2 is currently in stock with 1,119 pieces available, providing immediate supply chain access for new designs and field replacement requirements.

Frequently Asked Questions (FAQ)

Q: Can the BA-2R-A2 be used as a direct replacement for the BA-2R281-A2 in existing designs?

A: Yes. The BA-2R-A2 is electrically and mechanically identical to the BA-2R281-A2 across all specified parameters. No design modifications are required for substitution.

Q: What is the difference between the BA-2R281-A2 and BA-2R-A2?

A: The primary difference is product status. The BA-2R281-A2 is obsolete, while the BA-2R-A2 is active. Packaging differs (standard versus bulk), but electrical, mechanical, and environmental specifications are identical.

Q: Are there any compatibility issues with the bulk packaging of the BA-2R-A2?

A: No. Bulk packaging affects only component presentation and handling during assembly. It does not alter electrical performance, mechanical characteristics, or functional operation of the switch.

Q: Does the BA-2R-A2 meet the same regulatory requirements as the BA-2R281-A2?

A: Yes. Both parts are RoHS compliant and share identical ECCN (EAR99) and HTSUS (8536.50.9040) classifications.

Q: What is the operating temperature range for the BA-2R-A2?

A: The operating temperature range is -55°C to 85°C, identical to the BA-2R281-A2.

Q: How many mechanical cycles can the BA-2R-A2 withstand?

A: The BA-2R-A2 is rated for 20,000,000 mechanical cycles, matching the BA-2R281-A2 specification.

Q: Is the BA-2R-A2 suitable for DC applications?

A: Yes. The BA-2R-A2 is rated for 500mA DC at 125V, identical to the BA-2R281-A2 DC rating.

Q: What is the moisture sensitivity level of the BA-2R-A2?

A: The moisture sensitivity level is 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.