Bourns 7201 Current Sense Transformer - Equivalent & Substitute Parts

Part Overview

The Bourns 7201 is a current sense transformer rated for 10A unidirectional operation in through-hole configuration. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. Current sense transformers serve as non-invasive measurement devices in power management and monitoring applications, converting primary current into a proportional secondary signal suitable for measurement and control circuits.

Substiute Parts

7201

Bourns Inc.In Stock: 26897201 Datasheet

Current PartRFQ

PE-51686NL

Pulse ElectronicsIn Stock: 2154PE-51686NL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Bourns 7201 is based on the following critical parameters:

• Current Rating: The substitute must support the application's current requirements. The Bourns 7201 operates at 10A; substitutes rated at 20A or higher maintain backward compatibility.
• Mounting Type: Through-hole configuration is maintained across all alternatives to ensure PCB compatibility without redesign.
• Physical Envelope: Dimensions must fit within existing board layouts. The substitute PE-51686NL (17.01mm x 9.90mm x 20.32mm) is dimensionally compatible with the original footprint.
• Functional Type: Current sense transformers with invasive or non-invasive measurement capability are interchangeable when current ratings and frequency response align with application requirements.
• Compliance Status: RoHS compliance status and REACH designation must be evaluated against end-product regulatory requirements.

Parameter Comparison

Engineering Selection Recommendations

The Pulse Electronics PE-51686NL serves as a direct substitute for the obsolete Bourns 7201 based on the following factors:

• Product Status: The PE-51686NL is active and in production, ensuring long-term availability and supply chain continuity compared to the obsolete Bourns 7201.
• Current Rating Compatibility: The PE-51686NL's 20A rating exceeds the Bourns 7201's 10A specification, providing operational margin and forward compatibility for applications requiring the original 10A performance.
• Physical Compatibility: Both components utilize through-hole mounting with compatible seated heights (20.10mm vs. 20.32mm), enabling direct PCB footprint substitution without layout modification.
• Regulatory Compliance: The PE-51686NL achieves RoHS compliance, addressing modern regulatory requirements where the original Bourns 7201 does not.
• Environmental Classification: Both components share MSL 1 (Unlimited) moisture sensitivity, maintaining equivalent environmental performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the Pulse Electronics PE-51686NL directly replace the Bourns 7201 without PCB modifications?

A: Yes. Both components are through-hole mounted with compatible physical envelopes. The PE-51686NL's dimensions (17.01mm x 9.90mm x 20.32mm) fit within the footprint space of the original Bourns 7201 (19.00mm x 11.00mm x 20.10mm).

Q: What is the significance of the higher 20A current rating on the PE-51686NL compared to the Bourns 7201's 10A rating?

A: The higher current rating indicates the PE-51686NL can handle greater current loads without saturation or thermal stress. For applications originally designed for 10A operation, the 20A-rated substitute provides operational headroom and maintains performance margins.

Q: Does the RoHS compliance difference between the two parts affect substitution?

A: RoHS compliance status depends on end-product regulatory requirements. The PE-51686NL's RoHS compliance makes it suitable for applications subject to RoHS directives. The Bourns 7201's non-compliance may restrict use in regulated markets. Verify your application's compliance requirements before selection.

Q: Are the frequency response characteristics of the PE-51686NL (20kHz ~ 200kHz) compatible with the original Bourns 7201 application?

A: Frequency compatibility must be verified against your specific circuit requirements. The PE-51686NL operates within the 20kHz to 200kHz band. Confirm that your application's operating frequency falls within this range or that the transformer's frequency response is suitable for your measurement and control circuit design.

Q: What is the significance of the 50:1 current ratio specified for the PE-51686NL?

A: The 50:1 current ratio defines the transformation relationship between primary and secondary windings. This ratio determines the secondary signal magnitude for a given primary current. Verify that this ratio matches your circuit's signal conditioning and measurement requirements.