SR3B-A1 Equivalent & Substitute Parts

Part Overview

The SR3B-A1 is a Hall Effect current output magnetic sensor manufactured by Honeywell Sensing and Productivity Solutions. This component operates as a magnetic switch with wire lead termination, designed for applications requiring detection of magnetic fields with current-based output signaling. The SR3B-A1 is classified as obsolete, making identification of functionally equivalent active alternatives necessary for ongoing design support and procurement continuity.

Substiute Parts

SR3B-A1

Honeywell Sensing and Productivity SolutionsIn Stock: 816SR3B-A1 Datasheet

Current PartRFQ

SR3F-A1

Honeywell Sensing and Productivity SolutionsIn Stock: 965SR3F-A1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SR3B-A1 is determined by strict equivalence across the following critical parameters:

Functional Equivalence Criteria:

• Manufacturer series consistency (SR3 family)
• Identical output type (Current)
• Identical sensor type (Hall Effect Switch)
• Identical actuator material (Magnet, South Pole)
• Identical termination style (Wire Leads)
• Matching frequency specification (100 kHz)
• Overlapping voltage supply range (4.5V ~ 24V)
• Compatible operating temperature range (-40°C ~ 85°C)
• Equivalent compliance certifications (RoHS Compliant, MSL 1)

The SR3F-A1 meets all functional equivalence criteria. While packaging differs (SR3B-A1 uses cylinder threaded case; SR3F-A1 uses barrel plastic housed flange mount), both components maintain identical electrical performance characteristics and operational specifications within the SR3 series.

Parameter Comparison

Engineering Selection Recommendations

The SR3F-A1 is the direct functional equivalent for the obsolete SR3B-A1. Selection of the SR3F-A1 is supported by the following engineering factors:

Product Status: The SR3F-A1 maintains active product status with Honeywell, ensuring ongoing availability and manufacturing support. The SR3B-A1 is obsolete and subject to discontinuation of supply.

Electrical Equivalence: All electrical parameters are identical, including output type, frequency response, voltage supply range, and operating temperature specifications. Current output signaling, Hall Effect switching behavior, and South Pole magnet actuation are preserved.

Compliance Certifications: Both components carry identical RoHS compliance status and MSL rating, meeting equivalent environmental and reliability standards.

Packaging Consideration: The primary difference is mechanical packaging. The SR3F-A1 uses a barrel plastic housed flange mount configuration, whereas the SR3B-A1 uses a cylinder threaded case. This difference requires mechanical integration review specific to the application mounting requirements.

Inventory Status: The SR3F-A1 is available in active inventory (864 Pcs), supporting immediate procurement and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the SR3F-A1 directly replace the SR3B-A1 in existing designs?

A: The SR3F-A1 provides complete electrical equivalence to the SR3B-A1. However, mechanical integration must be evaluated. The SR3B-A1 uses a threaded cylinder package, while the SR3F-A1 uses a flange-mounted barrel housing. Mounting hardware and mechanical interfaces require design review to confirm compatibility with the application's physical constraints.

Q: Are the output signal characteristics identical between SR3B-A1 and SR3F-A1?

A: Yes. Both components are Hall Effect current output sensors with identical frequency response (100 kHz), voltage supply range (4.5V ~ 24V), and South Pole magnet actuation. Current output signaling is functionally equivalent.

Q: What is the difference in packaging between these two parts?

A: The SR3B-A1 is housed in a cylinder with threaded mounting. The SR3F-A1 uses a barrel plastic housing with flange mount configuration. Both maintain wire lead termination. The packaging difference affects mechanical mounting only; electrical performance is unchanged.

Q: Are both parts RoHS compliant?

A: Yes. Both the SR3B-A1 and SR3F-A1 are RoHS Compliant with MSL rating of 1 (Unlimited), meeting equivalent environmental and reliability standards.

Q: Why is the SR3B-A1 listed as obsolete?

A: The SR3B-A1 has been discontinued by Honeywell. The SR3F-A1 represents the active product continuation within the SR3 series, providing equivalent functionality with ongoing manufacturing support.

Q: What operating temperature range do these sensors support?

A: Both the SR3B-A1 and SR3F-A1 operate across the identical temperature range of -40°C to 85°C (TA), supporting applications in industrial and automotive environments.

Q: Are there any differences in magnetic actuation between these parts?

A: No. Both components use South Pole magnet actuation with identical magnetic switching behavior. The actuator material and switching characteristics are equivalent.