VLP270SUF Equivalent & Substitute Parts

Part Overview

The VLP270SUF is an active polymeric PTC resettable fuse manufactured by Littelfuse Inc. in the PolySwitch® VLP series. This component provides overcurrent protection with automatic reset capability at 16V and 2.7A hold current. The part is supplied in strap packaging with user-defined mounting configuration. Substitute parts are identified when electrical and mechanical parameters remain within the specified tolerances for this product category, ensuring functional equivalence in circuit protection applications.

Key Parameters

Parameter	Value
Voltage - Max	16V
Current - Hold (Ih) (Max)	2.7 A
Current - Trip (It)	6.5 A
Current - Max	60 A
Time to Trip	5 s
Resistance - Initial (Ri) (Min)	12 mOhms
Resistance - Post Trip (R1) (Max)	36 mOhms
Operating Temperature	-40°C ~ 85°C
Type	Polymeric
Package / Case	Strap
Size / Dimension	0.866" L x 0.201" W (22.00mm x 5.10mm)
Thickness (Max)	0.032" (0.80mm)
Approval Agency	CSA, TUV, UL
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the VLP270SUF is determined by strict equivalence across the following critical parameters:

Voltage rating: 16V maximum
Current hold specification: 2.7A maximum
Current trip specification: 6.5A
Resistance characteristics: 12 mOhms initial minimum, 36 mOhms post-trip maximum
Operating temperature range: -40°C to 85°C
Package type: Strap configuration
Physical dimensions: 22.00mm L x 5.10mm W x 0.80mm maximum thickness
Regulatory compliance: CSA, TUV, UL certifications
Environmental compliance: ROHS3 compliant

The VLP270F meets all these parameters and is classified as a parametric equivalent. Packaging differences (bulk versus strap) do not affect electrical or mechanical compatibility.

Parameter Comparison

Parameter	VLP270SUF	VLP270F	Match
Voltage - Max	16V	16V	Yes
Current - Hold (Ih) (Max)	2.7 A	2.7 A	Yes
Current - Trip (It)	6.5 A	6.5 A	Yes
Current - Max	60 A	60 A	Yes
Time to Trip	5 s	5 s	Yes
Resistance - Initial (Ri) (Min)	12 mOhms	12 mOhms	Yes
Resistance - Post Trip (R1) (Max)	36 mOhms	36 mOhms	Yes
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Yes
Type	Polymeric	Polymeric	Yes
Package / Case	Strap	Strap	Yes
Size / Dimension	22.00mm x 5.10mm	22.00mm x 5.10mm	Yes
Thickness (Max)	0.80mm	0.80mm	Yes
Approval Agency	CSA, TUV, UL	CSA, TUV, UL	Yes
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Yes

Engineering Selection Recommendations

Both VLP270SUF and VLP270F are active products with identical electrical and mechanical specifications. Selection between these parts is based on packaging and inventory considerations:

The VLP270SUF is supplied in strap packaging with user-defined mounting configuration. The VLP270F is supplied in bulk packaging with the same strap case type. Both parts carry CSA, TUV, and UL approvals and meet ROHS3 compliance requirements. The VLP270F offers higher inventory availability (8400 pcs) compared to VLP270SUF (698 pcs). Moisture sensitivity differs: VLP270SUF is rated MSL 2A (4 weeks), while VLP270F is rated MSL 1 (unlimited). This difference does not affect electrical performance but may influence storage and handling procedures.

Frequently Asked Questions (FAQ)

Q: Can VLP270F replace VLP270SUF in existing designs? A: Yes. Both parts are parametric equivalents with identical electrical characteristics, voltage ratings, current specifications, resistance values, and operating temperature ranges. Physical dimensions and package type are identical.

Q: What is the difference between VLP270SUF and VLP270F? A: The primary differences are packaging presentation (strap versus bulk) and moisture sensitivity level. VLP270SUF has MSL 2A (4 weeks), while VLP270F has MSL 1 (unlimited). Electrical and mechanical specifications are identical.

Q: Are both parts certified by the same agencies? A: Yes. Both VLP270SUF and VLP270F carry CSA, TUV, and UL approvals and are ROHS3 compliant.

Q: Does the moisture sensitivity rating affect circuit performance? A: Moisture sensitivity levels affect component storage and handling procedures, not electrical performance. Both parts perform identically in circuit operation.

Q: Are the physical dimensions identical? A: Yes. Both parts measure 22.00mm L x 5.10mm W x 0.80mm maximum thickness and use strap packaging.

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