PFLT.180 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The PFLT.180 is a polymeric PTC resettable fuse manufactured by SCHURTER Inc., rated for 24V with a 1.8A hold current. This component is designed for overcurrent protection in electronic circuits and automatically resets after a fault condition is cleared. The PFLT.180 is currently listed as obsolete, making identification of active equivalent parts essential for ongoing design support, maintenance, and new production sourcing.

Substiute Parts

PFLT.180

SCHURTER Inc.In Stock: 1091PFLT.180 Datasheet

Current PartRFQ

MF-LS180

Bourns Inc.In Stock: 4584MF-LS180 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PFLT.180 is determined by strict equivalence across the following critical parameters:

• Voltage rating: 24V maximum
• Current hold (Ih): 1.8A maximum
• Current trip (It): 3.8A
• Time to trip: 2.9 seconds
• Initial resistance (Ri): 40 mOhms minimum
• Post-trip resistance (R1): 120 mOhms maximum
• Package type: Strap configuration
• Physical dimensions: 25.00mm L x 5.05mm W x 1.00mm thickness
• Polymeric PTC technology

The MF-LS180 from Bourns Inc. meets all these electrical and mechanical specifications, establishing it as a direct functional equivalent. Both parts operate within identical parameter ranges and share the same physical form factor, enabling direct substitution in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The MF-LS180 from Bourns Inc. is the direct equivalent substitute for the obsolete PFLT.180. Selection of the MF-LS180 is supported by:

• Complete electrical parameter equivalence across all critical specifications
• Identical physical form factor and strap package configuration
• Active product status ensuring ongoing availability and supply chain continuity
• ROHS3 compliance and REACH unaffected status matching the original part
• Approval certifications (cURus, TUV) providing regulatory compliance for industrial applications
• Polymeric PTC technology identical to the original design

The MF-LS180 operates within a slightly narrower lower temperature range (-40°C versus -45°C minimum), which is acceptable for most applications operating within standard industrial temperature bands. For applications requiring the full -45°C lower limit, this parameter difference must be evaluated against specific system requirements.

Frequently Asked Questions (FAQ)

Q: Can the MF-LS180 be used as a direct replacement for the PFLT.180?

A: Yes. The MF-LS180 meets all electrical and mechanical specifications of the PFLT.180, including voltage rating, current hold and trip values, response time, resistance characteristics, and physical dimensions. Direct substitution is supported.

Q: What is the primary reason for substituting the PFLT.180?

A: The PFLT.180 is obsolete. The MF-LS180 provides an active, continuously available equivalent from a major manufacturer, ensuring long-term supply chain reliability.

Q: Are there any parameter differences between these parts?

A: The operating temperature range differs slightly. The PFLT.180 operates from -45°C to 85°C, while the MF-LS180 operates from -40°C to 85°C. All other electrical and mechanical parameters are identical.

Q: Do both parts have the same regulatory compliance?

A: Both parts are ROHS3 compliant and REACH unaffected. The MF-LS180 carries cURus and TUV certifications, while the PFLT.180 carries CSA, TUV, and UL certifications. Both meet industrial regulatory requirements.

Q: Is the strap package configuration identical?

A: Yes. Both parts use identical strap packaging with dimensions of 25.00mm length, 5.05mm width, and 1.00mm maximum thickness, enabling direct mechanical substitution.

Q: What is the availability status of the MF-LS180?

A: The MF-LS180 is an active product with established supply chain availability, unlike the obsolete PFLT.180.