VLP270ULF Polymeric PTC Resettable Fuse - Equivalent & Substitute Parts

Part Overview

The VLP270ULF is an active polymeric PTC resettable fuse manufactured by Littelfuse Inc. in the PolySwitch® VLP series. This component provides overcurrent protection with a 16V maximum voltage rating and 2.7A hold current specification. The device is designed for user-defined strap mounting applications and is ROHS3 compliant with CSA, TUV, and UL approvals. Substitute parts are identified when electrical parameters, mechanical dimensions, and compliance certifications remain equivalent across packaging configurations.

Substiute Parts

VLP270ULF

Littelfuse Inc.In Stock: 724VLP270ULF Datasheet

Current PartRFQ

VLP270F

Littelfuse Inc.In Stock: 8451VLP270F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The VLP270F qualifies as a parametric equivalent to the VLP270ULF based on identical electrical and mechanical specifications. Both components share the same voltage rating (16V), hold current (2.7A), trip current (6.5A), maximum current (60A), time to trip (5s), initial resistance (12 mOhms minimum), post-trip resistance (36 mOhms maximum), operating temperature range (-40°C to 85°C), physical dimensions (22.00mm x 5.10mm), and thickness (0.80mm maximum). Both are manufactured by Littelfuse Inc. within the PolySwitch® VLP series and maintain active product status with CSA, TUV, and UL certifications. The primary distinction is packaging configuration: VLP270ULF is supplied in user-defined strap packaging, while VLP270F is supplied in bulk packaging. This difference does not affect electrical performance or mechanical compatibility in applications requiring strap-mounted PTC resettable fuses.

Parameter Comparison

Engineering Selection Recommendations

Both VLP270ULF and VLP270F are active products with identical electrical performance and mechanical specifications. Selection between these parts is determined by packaging requirements and supply chain availability. The VLP270ULF is supplied in user-defined strap packaging with 650 pieces in current inventory. The VLP270F is supplied in bulk packaging with 8400 pieces in current inventory. Both components maintain ROHS3 compliance and hold equivalent certifications from CSA, TUV, and UL. The VLP270F offers higher inventory availability and bulk packaging efficiency, while the VLP270ULF provides pre-configured strap packaging. Component selection should be based on procurement quantity requirements, packaging format compatibility with assembly processes, and lead time considerations.

Frequently Asked Questions (FAQ)

Q: Are VLP270ULF and VLP270F electrically interchangeable? A: Yes. Both components share identical electrical specifications including 16V maximum voltage, 2.7A hold current, 6.5A trip current, 5-second trip time, and identical resistance characteristics. Electrical performance is equivalent across all operating conditions within the specified temperature range of -40°C to 85°C.

Q: What is the difference between VLP270ULF and VLP270F? A: The primary difference is packaging configuration. VLP270ULF is supplied in user-defined strap packaging, while VLP270F is supplied in bulk packaging. All electrical and mechanical parameters are identical. The VLP270F offers significantly higher inventory availability (8400 pieces versus 650 pieces).

Q: Can VLP270F replace VLP270ULF in existing designs? A: Yes, provided the application accommodates bulk packaging format. Both components have identical physical dimensions (22.00mm x 5.10mm x 0.80mm maximum thickness) and mounting type (user-defined strap). No circuit modifications or design changes are required.

Q: Do both parts maintain the same compliance certifications? A: Yes. Both VLP270ULF and VLP270F hold identical approvals from CSA, TUV, and UL, and both are ROHS3 compliant. Regulatory compliance is equivalent for both part numbers.

Q: What is the moisture sensitivity level difference between these parts? A: VLP270ULF has MSL 2A (4 weeks), while VLP270F has MSL 1 (Unlimited). This indicates VLP270F has less stringent moisture handling requirements during storage and transportation.