VLR230SF Equivalent & Substitute Parts

Part Overview

The VLR230SF is a Polymeric PTC Resettable Fuse manufactured by Littelfuse Inc. in the PolySwitch® VLR series. This component is rated for 12V maximum voltage with a 2.3A hold current and is designed for user-defined strap mounting applications. The product is currently classified as Obsolete, making identification of equivalent substitute parts essential for ongoing system support and component procurement.

Substiute Parts

VLR230SF

Littelfuse Inc.In Stock: 1108VLR230SF Datasheet

Current PartRFQ

MF-VS175-0

Bourns Inc.In Stock: 1122MF-VS175-0 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the VLR230SF is determined by the following critical electrical and mechanical parameters:

Voltage Rating: The substitute must support 12V maximum voltage operation.

Current Characteristics: The substitute must accommodate the hold current (Ih) and trip current (It) requirements of the application. The VLR230SF specifies 2.3A hold current and 5A trip current.

Polymeric Type: The substitute must be a Polymeric PTC Resettable Fuse to maintain functional equivalence.

Package Configuration: The substitute must use Strap mounting to ensure mechanical compatibility.

Operating Temperature Range: The substitute must support the required thermal operating window.

Regulatory Compliance: The substitute must maintain equivalent certifications (CSA, TUV, UL) and RoHS3 compliance.

The MF-VS175-0 from Bourns Inc. qualifies as a substitute based on these parameters, though with specific electrical characteristic variations that must be evaluated for the intended application.

Parameter Comparison

Engineering Selection Recommendations

The MF-VS175-0 is available as an Active product from Bourns Inc., providing supply continuity for applications previously using the Obsolete VLR230SF. Both components maintain ROHS3 compliance and REACH Unaffected status, satisfying regulatory requirements.

The MF-VS175-0 carries cURus and TUV certifications. The original VLR230SF includes CSA certification, which is not listed for the Bourns substitute. Applications requiring CSA certification must verify alternative options or confirm that cURus certification meets system requirements.

The MF-VS175-0 supports an extended operating temperature range (-40°C ~ 85°C) compared to the VLR230SF (-40°C ~ 70°C), providing broader thermal compatibility.

Electrical parameter differences exist between these components. The MF-VS175-0 specifies lower hold current (1.75A vs. 2.3A) and lower trip current (4.6A vs. 5A), with faster trip time (3s vs. 5s) and higher initial resistance (29 mOhms vs. 12 mOhms). These differences must be evaluated against circuit protection requirements and system design specifications.

Frequently Asked Questions (FAQ)

Q: Can the MF-VS175-0 directly replace the VLR230SF in all applications?

A: Both components share the same voltage rating (12V), polymeric type, and strap package configuration. However, the MF-VS175-0 has lower current ratings (1.75A hold vs. 2.3A hold) and faster trip characteristics (3s vs. 5s). Direct replacement is only appropriate if the application circuit operates within the MF-VS175-0 current specifications and can tolerate faster trip response.

Q: What are the key electrical differences between these parts?

A: The MF-VS175-0 has lower hold current (1.75A vs. 2.3A), lower trip current (4.6A vs. 5A), higher initial resistance (29 mOhms vs. 12 mOhms), and faster trip time (3s vs. 5s). These differences affect circuit protection behavior and must be validated for the specific application.

Q: Are the certifications equivalent between VLR230SF and MF-VS175-0?

A: The VLR230SF carries CSA, TUV, and UL certifications. The MF-VS175-0 carries cURus and TUV certifications. If CSA certification is a system requirement, the MF-VS175-0 does not provide this certification and alternative components must be evaluated.

Q: Is the strap package identical between these components?

A: Both components use strap mounting. Physical dimensions are specified for the VLR230SF (0.866" L x 0.201" W, 0.032" thickness). Dimension specifications are not provided for the MF-VS175-0. Physical compatibility must be verified through component datasheets or sample evaluation before production implementation.

Q: What is the operating temperature difference?

A: The VLR230SF operates from -40°C to 70°C. The MF-VS175-0 operates from -40°C to 85°C. The Bourns component provides a 15°C higher upper temperature limit, which may be beneficial for applications in elevated thermal environments.