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Ⅰ.Overview of product

The 2016L150/33DR is a polymeric PTC resettable fuse under Littelfuse’s POLY-FUSE® 2016L series, categorized under circuit protection components. It features self-resetting functionality, providing reliable overcurrent and overheating protection for various electronic devices, and is suitable for surface-mount assembly in compact designs.

Ⅱ.Core parameter

Category:Circuit Protection,PTC Resettable Fuses

Manufacturer:Littelfuse Inc.

Series:POLY-FUSE®, 2016L

Packaging:Tape & Reel

Part Status:Active

Type:Polymeric

Voltage - Max:33V

Current - Hold (Ih) (Max):1.5 A

Current - Trip (It):3 A

Current - Max:40 A

Resistance - Initial (Ri) (Min):70 mOhms

Resistance - Post Trip (R1) (Max):180 mOhms

Operating Temperature:-40°C ~ 85°C

Mounting Type:Surface Mount

Package / Case:2016 (5041 Metric), Concave

Size / Dimension:0.200" L x 0.160" W (5.08mm x 4.07mm)

Thickness (Max):0.063" (1.60mm)

Ⅲ.Main characteristics

Self-Resetting Function:Automatically restores to low-resistance state after the fault (overcurrent/overheating) is removed, eliminating the need for manual replacement, reducing maintenance costs and device downtime.

Reliable Overcurrent Protection:Trips quickly when current exceeds 3A (trip current), limiting maximum current to 40A to prevent damage to sensitive electronic components from excessive current.

Low Initial Resistance:Minimum initial resistance of 70 mOhms ensures minimal power loss and voltage drop during normal operation, maintaining stable device performance.

Wide Operating Voltage & Temperature:Supports a maximum voltage of 33V and operates reliably from -40°C to 85°C, adapting to various working environments and power supply scenarios.

Compact Surface-Mount Design:2016 (5041 Metric) concave package with small dimensions (5.08mm x 4.07mm x 1.60mm) saves PCB space, suitable for miniaturized electronic products.

Stable Post-Trip Performance:Maximum post-trip resistance of 180 mOhms ensures effective current limiting after tripping, providing continuous protection until the fault is cleared.

Ⅳ.Application field

Mobile Phone Charger Protection:Installed in 5V/2A mobile phone chargers, protecting the charger’s internal control IC from overcurrent caused by short circuits in the charging cable or abnormal current draw from the phone. It trips quickly when current exceeds 3A and resets automatically after the fault is resolved.

Portable Power Bank Overcurrent Guard:Used in 10000mAh portable power banks, safeguarding the lithium-ion battery pack and charging module. It prevents overcurrent damage when multiple devices are charged simultaneously or the output port is short-circuited.

Automotive USB Port Protection:Integrated in automotive USB charging ports (12V to 5V conversion), protecting the vehicle’s on-board electrical system from overcurrent due to faulty USB devices. Its wide operating temperature range (-40°C ~ 85°C) adapts to extreme automotive environments.

LED Driver Circuit Protection:Applied in 12V LED strip drivers, limiting excessive current caused by LED strip short circuits or driver module failures. The low initial resistance ensures minimal voltage drop, maintaining stable LED brightness.

Wireless Earbud Charging Case Protection:Used in wireless earbud charging cases, protecting the case’s charging management chip from overcurrent during earbud charging. The compact size fits the small internal space of the charging case.

Industrial Control Sensor Power Protection:Installed in the power supply circuit of industrial temperature sensors (operating at 24V), preventing overcurrent damage to the sensor and connected PLC module caused by sensor wiring short circuits.

Tablet PC Battery Protection:Integrated in the battery management system (BMS) of tablet PCs, protecting the lithium-polymer battery from overcurrent during fast charging or abnormal battery internal short circuits.

Ⅴ.Summary

The 2016L150/33DR is a reliable polymeric PTC resettable fuse with self-resetting, low power loss, and compact design advantages. It provides effective overcurrent and overheating protection for a wide range of electronic devices, making it an ideal choice for consumer electronics, automotive electronics, and industrial control applications.