PFLT.190 Polymeric PTC Resettable Fuse 24V 1.9A Equivalent & Substitute Parts

Part Overview

The PFLT.190 is a polymeric PTC resettable fuse manufactured by SCHURTER Inc., rated for 24V maximum voltage with a 1.9A hold current. This component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing system support and procurement planning. The PFLT.190 series provides automatic overcurrent protection with automatic recovery capability in strap-mounted configurations.

Substiute Parts

PFLT.190

SCHURTER Inc.In Stock: 978PFLT.190 Datasheet

Current PartRFQ

MF-LS190

Bourns Inc.In Stock: 1062MF-LS190 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PFLT.190 is determined by strict equivalence across the following critical parameters:

• Voltage rating: 24V maximum
• Current hold rating: 1.9A
• Current trip rating: 4.2A
• Maximum current capacity: 100A
• Time to trip: 3 seconds
• Initial resistance: 30 mOhms minimum
• Post-trip resistance: 100 mOhms maximum
• Package type: Strap configuration
• Physical dimensions: 0.880" L x 0.417" W (22.35mm x 10.60mm)
• Polymeric PTC technology

The MF-LS190 manufactured by Bourns Inc. meets all specified electrical and mechanical parameters for direct substitution.

Parameter Comparison

*Operating temperature range: MF-LS190 minimum is -40°C versus PFLT.190 minimum of -45°C. For applications requiring operation below -40°C, the MF-LS190 does not cover the full temperature envelope of the original part.

Engineering Selection Recommendations

The MF-LS190 from Bourns Inc. is the direct electrical and mechanical equivalent for the obsolete PFLT.190. Both components are ROHS3 compliant and carry equivalent regulatory approvals (CSA, TUV, UL for PFLT.190; cURus, TUV for MF-LS190).

The primary distinction is product status: the PFLT.190 is obsolete, while the MF-LS190 is active and currently manufactured. The MF-LS190 is available in bulk packaging with 1005 pieces in stock, providing supply continuity for new designs and replacement applications.

The operating temperature range difference (-40°C minimum for MF-LS190 versus -45°C for PFLT.190) must be evaluated against specific application requirements. For systems operating at or below -40°C, this parameter difference requires assessment.

Frequently Asked Questions (FAQ)

Q: Can the MF-LS190 directly replace the PFLT.190 in existing designs?

A: Yes, for applications within the MF-LS190 operating temperature range (-40°C to 85°C). All electrical parameters, current ratings, response times, and physical dimensions are identical. Both use strap mounting and polymeric PTC technology.

Q: What is the difference in operating temperature range?

A: The PFLT.190 operates from -45°C to 85°C, while the MF-LS190 operates from -40°C to 85°C. The MF-LS190 has a 5°C higher minimum temperature limit. Applications requiring operation below -40°C must retain the PFLT.190 or identify alternative solutions.

Q: Are there compliance or certification differences?

A: Both parts are ROHS3 compliant and REACH unaffected. The PFLT.190 carries CSA, TUV, and UL approvals. The MF-LS190 carries cURus and TUV approvals. Verify that the MF-LS190 certifications meet your specific application and regional requirements.

Q: What is the packaging difference?

A: The PFLT.190 is listed with "-" packaging (vendor undefined), while the MF-LS190 is supplied in bulk packaging. Both are strap-mounted components with identical physical dimensions.

Q: Why is the PFLT.190 obsolete?

A: Product obsolescence is determined by the manufacturer. The MF-LS190 provides functional continuity with active manufacturing status and current supply availability.

Q: Are the electrical characteristics truly identical?

A: Yes. Voltage rating, current hold, current trip, maximum current, time to trip, initial resistance, and post-trip resistance are identical across both parts. Both are polymeric PTC resettable fuses with 24V/1.9A ratings.