VTP210SF Polymeric PTC Resettable Fuse - Equivalent & Substitute Parts

Part Overview

The VTP210SF is an active polymeric PTC resettable fuse manufactured by Littelfuse, part of the PolySwitch® VTP series. This component provides overcurrent protection with a 16V maximum voltage rating and 2.1A hold current specification. The device is designed for applications requiring automatic reset functionality after fault conditions are cleared. Substitute parts are identified when electrical and mechanical parameters match the original specification, ensuring direct compatibility in circuit protection applications.

Substiute Parts

VTP210SF

LittelfuseIn Stock: 1204VTP210SF Datasheet

Current PartRFQ

VTP210GF

Littelfuse Inc.In Stock: 2313VTP210GF Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the VTP210SF are identified based on exact matching of the following critical parameters:

• Voltage rating: 16V maximum
• Hold current (Ih): 2.1A maximum
• Trip current (It): 4.7A
• Time to trip: 5 seconds
• Initial resistance (Ri): 18 mOhms minimum
• Post-trip resistance (R1): 60 mOhms maximum
• Operating temperature range: -40°C to 85°C
• Package type: Strap configuration
• Physical dimensions: 0.909" L x 0.209" W (23.10mm x 5.30mm)
• Thickness: 0.032" (0.80mm) maximum
• Polymeric type classification
• PolySwitch® VTP series designation
• Active product status
• ROHS3 compliance
• CSA, TUV, UL certifications

Parts meeting all these parameters are classified as direct parametric equivalents and may be substituted without circuit redesign.

Parameter Comparison

Engineering Selection Recommendations

The VTP210GF is a direct parametric equivalent to the VTP210SF. Both components are active products from Littelfuse's PolySwitch® VTP series with identical electrical specifications, mechanical dimensions, and regulatory certifications. Both parts maintain ROHS3 compliance and carry CSA, TUV, and UL approvals. Selection between these parts may be based on inventory availability or procurement lead time, as no technical differentiation exists between them.

Frequently Asked Questions (FAQ)

Q: Can VTP210GF be used as a direct replacement for VTP210SF? A: Yes. The VTP210GF meets all electrical and mechanical parameters of the VTP210SF, including voltage rating, hold current, trip current, resistance characteristics, operating temperature range, physical dimensions, and regulatory certifications.

Q: Are there any differences in the strap package configuration between these parts? A: No. Both parts use identical strap packaging with dimensions of 0.909" L x 0.209" W (23.10mm x 5.30mm) and maximum thickness of 0.032" (0.80mm).

Q: Do both parts have the same regulatory approvals? A: Yes. Both VTP210SF and VTP210GF carry CSA, TUV, and UL approvals and are ROHS3 compliant.

Q: What is the significance of the 2.1A hold current specification? A: The 2.1A hold current (Ih) defines the maximum continuous current the device can carry without tripping. This parameter must match the application requirement to ensure proper circuit protection.

Q: How does the 4.7A trip current relate to the 2.1A hold current? A: The 4.7A trip current (It) is the threshold at which the device activates protection. The ratio between trip current and hold current determines the sensitivity margin of the overcurrent protection function.

Q: What does the 5-second time to trip specification indicate? A: The 5-second time to trip indicates the maximum duration required for the device to transition to its high-resistance state when subjected to the trip current threshold, providing a defined response time for circuit protection.

Q: Are moisture sensitivity considerations relevant for these strap-mounted components? A: Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage or handling.