VTP170XSF-3 Equivalent & Substitute Parts

Part Overview

The VTP170XSF-3 is a polymeric PTC resettable fuse manufactured by Littelfuse Inc. as part of the PolySwitch® VTP series. This component is rated for 16V maximum voltage with a 1.7A hold current and 3.4A trip current, designed for overcurrent protection in electronic circuits. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing maintenance, repair, and legacy system support.

Substiute Parts

VTP170XSF-3

Littelfuse Inc.In Stock: 1028VTP170XSF-3 Datasheet

Current PartRFQ

VTP170XSF

Littelfuse Inc.In Stock: 1027VTP170XSF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the VTP170XSF-3 is determined by strict equivalence across the following critical parameters:

• Voltage rating: 16V maximum
• Current hold rating: 1.7A maximum
• Current trip rating: 3.4A
• Package type: Strap configuration
• Physical dimensions: 0.862" L x 0.201" W (21.90mm x 5.10mm)
• Operating temperature range: -40°C to 85°C
• Regulatory compliance: CSA, TUV, UL approval
• RoHS compliance: ROHS3 Compliant

The VTP170XSF is identified as a direct substitute based on identical electrical specifications, physical dimensions, and regulatory certifications. The primary distinction is product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The VTP170XSF serves as the active production equivalent to the obsolete VTP170XSF-3. Both components maintain identical electrical characteristics, thermal ratings, and physical form factors. The VTP170XSF is currently in active product status with confirmed inventory availability, making it the appropriate selection for new designs, repairs, and legacy system replacements.

Both parts carry equivalent regulatory approvals (CSA, TUV, UL) and maintain ROHS3 compliance, ensuring compatibility with current environmental and safety standards. The transition from VTP170XSF-3 to VTP170XSF represents a standard product lifecycle update with no functional or performance degradation.

Frequently Asked Questions (FAQ)

Q: Can VTP170XSF replace VTP170XSF-3 in existing applications?

A: Yes. The VTP170XSF is electrically and mechanically equivalent to the VTP170XSF-3. Both components share identical voltage ratings (16V), current hold ratings (1.7A), current trip ratings (3.4A), physical dimensions (0.862" L x 0.201" W), and operating temperature ranges (-40°C to 85°C).

Q: What is the primary difference between these two part numbers?

A: The VTP170XSF-3 is obsolete, while the VTP170XSF is in active production status. The packaging format differs (VTP170XSF-3 uses standard packaging; VTP170XSF is supplied in bulk). All electrical and mechanical specifications remain identical.

Q: Are regulatory certifications maintained across both parts?

A: Yes. Both the VTP170XSF-3 and VTP170XSF carry CSA, TUV, and UL approvals. Both are ROHS3 compliant and maintain MSL 1 (Unlimited) moisture sensitivity ratings.

Q: What are the critical parameters for substitution compatibility?

A: Substitution is valid when the following parameters match: maximum voltage (16V), hold current rating (1.7A), trip current rating (3.4A), package type (Strap), physical dimensions (0.862" L x 0.201" W), and operating temperature range (-40°C to 85°C).

Q: Is the strap package configuration identical between both parts?

A: Yes. Both components use identical strap package configurations with matching physical dimensions of 0.862" L x 0.201" W (21.90mm x 5.10mm) and maximum thickness of 0.032" (0.80mm).