16VT210U Polymeric PTC Resettable Fuse - Equivalent & Substitute Parts

Part Overview

The 16VT210U is a polymeric PTC resettable fuse manufactured by Littelfuse Inc. under the POLY-FUSE® VT series. This component is designed for overcurrent protection in 16V circuits with a 2.1A hold current rating. The device has reached obsolete product status, making identification of functionally equivalent alternatives essential for ongoing system support, maintenance, and new production requirements where legacy component sourcing becomes constrained.

Key Parameters

Parameter	Value
Voltage - Max	16V
Current - Hold (Ih) (Max)	2.1 A
Current - Trip (It)	4.7 A
Current - Max	100 A
Time to Trip	5 s
Resistance - Initial (Ri) (Min)	18 mOhms
Resistance - Post Trip (R1) (Max)	60 mOhms
Operating Temperature	-40°C ~ 85°C
Type	Polymeric
Package / Case	Strap
RoHS Status	ROHS3 Compliant
Approval Agency	cURus, TUV

Substitute Part Grouping Explanation

Substitution eligibility for the 16VT210U is determined by strict equivalence across 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
Component type: Polymeric PTC resettable fuse
Package type: Strap configuration
Regulatory compliance: cURus and TUV approval

The MF-VS210-0 from Bourns Inc. meets all specified electrical and mechanical parameters, establishing it as a direct functional equivalent within the Multifuse® MF-VS series.

Parameter Comparison

Parameter	16VT210U (Littelfuse)	MF-VS210-0 (Bourns)	Match Status
Voltage - Max	16V	16V	Equivalent
Current - Hold (Ih) (Max)	2.1 A	2.1 A	Equivalent
Current - Trip (It)	4.7 A	4.7 A	Equivalent
Current - Max	100 A	100 A	Equivalent
Time to Trip	5 s	5 s	Equivalent
Resistance - Initial (Ri) (Min)	18 mOhms	18 mOhms	Equivalent
Resistance - Post Trip (R1) (Max)	60 mOhms	60 mOhms	Equivalent
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Equivalent
Type	Polymeric	Polymeric	Equivalent
Package / Case	Strap	Strap	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Approval Agency	cURus, TUV	cURus, TUV	Equivalent
Size / Dimension	0.866" L x 0.201" W (22.00mm x 5.10mm)	0.866" L x 0.205" W (22.00mm x 5.20mm)	Within tolerance
Thickness (Max)	0.032" (0.80mm)	0.035" (0.90mm)	Within tolerance
Product Status	Obsolete	Active	Substitute is active

Engineering Selection Recommendations

The MF-VS210-0 is the qualified substitute for the obsolete 16VT210U based on the following factors:

All electrical parameters match exactly: voltage, hold current, trip current, time to trip, and resistance specifications are identical. Mechanical dimensions are within acceptable tolerance for strap-mounted configurations. Both components maintain identical regulatory certifications (cURus and TUV approval) and RoHS3 compliance status.

The MF-VS210-0 carries active product status from Bourns Inc., ensuring ongoing availability and supply chain continuity. This addresses the primary constraint imposed by the 16VT210U's obsolete classification.

Physical dimensions show minor variations (width: 5.10mm vs 5.20mm; thickness: 0.80mm vs 0.90mm) that remain within standard mechanical tolerances for strap-mounted fuse applications and do not affect electrical performance or circuit board integration.

Frequently Asked Questions (FAQ)

Q: Can the MF-VS210-0 be used as a direct replacement for the 16VT210U in existing designs?

A: Yes. The MF-VS210-0 meets all specified electrical parameters and maintains identical regulatory certifications. Minor dimensional variations (0.1mm width, 0.1mm thickness) are within standard mechanical tolerances for strap-mounted components and do not affect circuit board layout or electrical performance.

Q: What is the primary reason for substitution?

A: The 16VT210U has reached obsolete product status. The MF-VS210-0 provides functional equivalence with active product availability from Bourns Inc.

Q: Are there compliance or certification differences between these parts?

A: No. Both components carry identical regulatory approvals (cURus and TUV) and maintain ROHS3 compliance status.

Q: How do the physical dimensions compare?

A: Length is identical at 22.00mm. Width differs by 0.1mm (5.10mm vs 5.20mm) and thickness by 0.1mm (0.80mm vs 0.90mm). These variations are within standard mechanical tolerances for strap-mounted fuse applications.

Q: Is the MF-VS210-0 available in the same packaging format?

A: Yes. Both components use strap package configuration. The MF-VS210-0 is available in bulk packaging with significantly higher inventory levels (10,400 pcs vs 741 pcs for the obsolete part).

Q: Do the electrical characteristics remain identical during operation?

A: Yes. Hold current, trip current, time to trip, initial resistance, and post-trip resistance specifications are identical across the full operating temperature range (-40°C to 85°C).

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