Equivalent & Substitute Parts for MF-VS170SS-0

Part Overview

The MF-VS170SS-0 is a Polymeric PTC Resettable Fuse manufactured by Bourns Inc. in the Multifuse® MF-VS series. This component is rated for 16V maximum voltage with a 1.7A hold current and 3.4A trip current, designed for strap mounting applications. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing system support and procurement planning.

Key Parameters

Parameter	Value
Voltage - Max	16V
Current - Hold (Ih) (Max)	1.7 A
Current - Trip (It)	3.4 A
Type	Polymeric
Operating Temperature	-40°C ~ 85°C
Resistance - Initial (Ri) (Min)	30 mOhms
Resistance - Post Trip (R1) (Max)	105 mOhms
Time to Trip	3 s
Package / Case	Strap
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the MF-VS170SS-0 is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain the 16V maximum voltage specification to ensure circuit protection integrity.

Current Characteristics: The hold current (Ih) and trip current (It) define the protection threshold. Substitutes are grouped based on whether they maintain equivalent current ratings or provide alternative protection levels suitable for the application.

Mounting Type: The original part uses strap mounting. Direct substitutes maintain this mounting configuration, while alternative substitutes may use surface mount packaging if circuit design permits.

Polymeric Type: All substitutes are polymeric PTC resettable fuses, maintaining the self-resetting functionality of the original component.

Temperature Range: Operating temperature must span -40°C to 85°C minimum to match environmental requirements.

Compliance: RoHS3 compliance is maintained across all substitute options.

Parameter Comparison

Parameter	MF-VS170SS-0	MF-VS170-0	VTP110F	MINISMDC260F/16-2
Manufacturer	Bourns Inc.	Bourns Inc.	Littelfuse Inc.	Littelfuse Inc.
Series	Multifuse® MF-VS	Multifuse® MF-VS	PolySwitch® VTP	PolySwitch® miniSMD
Product Status	Obsolete	Active	Active	Active
Voltage - Max	16V	16V	16V	16V
Current - Hold (Ih) (Max)	1.7 A	1.7 A	1.1 A	2.6 A
Current - Trip (It)	3.4 A	3.4 A	2.7 A	5 A
Type	Polymeric	Polymeric	Polymeric	Polymeric
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Resistance - Initial (Ri) (Min)	30 mOhms	30 mOhms	38 mOhms	15 mOhms
Resistance - Post Trip (R1) (Max)	105 mOhms	105 mOhms	140 mOhms	50 mOhms
Time to Trip	3 s	3 s	5 s	5 s
Package / Case	Strap	Strap	Strap	1812 (4532 Metric), Concave
Mounting Type	User Defined	User Defined	User Defined	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	UR	cURus, TUV	CSA, TUV, UL	CSA, TUV, UL

Engineering Selection Recommendations

Direct Equivalent: MF-VS170-0 is the primary substitute for MF-VS170SS-0. Both components share identical electrical specifications (16V, 1.7A hold current, 3.4A trip current, 3s trip time) and strap mounting configuration. The MF-VS170-0 is currently in active production status with higher inventory availability (3020 pcs vs. 909 pcs). Approval certifications are expanded (cURus, TUV vs. UR only), providing broader regulatory acceptance. This part represents a direct form-fit-function replacement.

Alternative with Lower Hold Current: VTP110F is a Littelfuse PolySwitch® VTP series strap-mounted fuse rated for 16V with 1.1A hold current and 2.7A trip current. This component provides lower current protection with extended trip time (5s vs. 3s). Selection of this part is appropriate only if circuit design permits reduced hold current protection. Approval certifications (CSA, TUV, UL) exceed the original part requirements.

Alternative with Higher Hold Current and Surface Mount Packaging: MINISMDC260F/16-2 is a Littelfuse PolySwitch® miniSMD surface-mount component rated for 16V with 2.6A hold current and 5A trip current. This part requires circuit redesign for surface mount integration and provides higher current protection than the original specification. Selection is limited to applications where surface mount packaging is feasible and higher current protection is acceptable.

Frequently Asked Questions (FAQ)

Q: Can MF-VS170-0 be used as a direct replacement for MF-VS170SS-0?

A: Yes. MF-VS170-0 maintains identical electrical specifications and strap mounting configuration. The primary difference is product status (active vs. obsolete) and expanded regulatory certifications. No circuit modifications are required.

Q: What is the difference between the strap mounting and surface mount options?

A: Strap mounting (MF-VS170SS-0, MF-VS170-0, VTP110F) uses lead-based connections for through-hole or manual assembly. Surface mount (MINISMDC260F/16-2) uses solder pads for automated PCB assembly. Switching between these mounting types requires circuit board redesign.

Q: Why does VTP110F have a lower hold current than the original part?

A: VTP110F is rated for 1.1A hold current compared to 1.7A for MF-VS170SS-0. This component provides protection at a lower current threshold. Selection requires verification that the application circuit can operate within this reduced current specification.

Q: Can MINISMDC260F/16-2 be used if the circuit board supports surface mount components?

A: MINISMDC260F/16-2 is electrically compatible at 16V voltage rating but provides higher current protection (2.6A hold, 5A trip vs. 1.7A hold, 3.4A trip). Use is limited to applications where this higher protection level is acceptable and circuit design permits surface mount integration.

Q: What compliance certifications should I verify for my application?

A: MF-VS170-0 carries cURus and TUV certifications. VTP110F and MINISMDC260F/16-2 carry CSA, TUV, and UL certifications. Verify that the selected part's certifications meet your specific regulatory requirements.

Q: Is there an inventory advantage to selecting one substitute over another?

A: MF-VS170-0 has the highest inventory (3020 pcs), followed by MINISMDC260F/16-2 (20237 pcs) and VTP110F (1075 pcs). Inventory levels should be considered alongside electrical and packaging compatibility requirements.

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