WSFB1208

Jingwo WSFB1208 Three-Terminal Fuse (Series Lithium Battery Protection for 2)

WSFB series three-terminal fuses, rated 12A and up to 36V DC for 2 series Li-ion batteries. Features integrated overcurrent and overvoltage protection; ideal for high-density SMT applications.

3-terminal SMD
Laptop, tablet, vacuum cleaner, robot vacuum, and power tool battery packs
Jingwo three-terminal fuse

Description

Product Description

Jingwo Technology's WSFB series three-terminal fuses integrate the fuse element and heater into a single unit. The heater triggers the fuse during overcurrent or overvoltage events to reliably disconnect lithium battery packs. The WSFB1208 model features a rated current of 12A, supports 2 series cells, and operates at up to 36V DC. It offers a breaking capacity of 50A, with heater resistance ranging from 2.0–3.2Ω and fuse resistance from 1.5–3.5mΩ. Designed for fast response and high-density surface mounting, it is RoHS compliant.

Specifications

Voltage coverage: 9 – 36 V
Current coverage: 12 – 50 A

Series	WSFB
Rated Current	12 A
Compatible Cell String Count	2 string
Maximum Voltage	36 V DC
Breaking Capacity	50 A
Operating Voltage	4.0–9.0 V
Heater resistor	2.0–3.2 Ω
Fuse resistor	1.5–3.5 mΩ

The parameters shown represent general category ranges. Actual supply shall be based on the specification confirmed at the time of order.

Supply

Supply Details

Authorized by the original manufacturer; datasheets and compliance reports available.
Lithium battery protection solutions available for selection and prototyping.
Battery pack solutions available for bulk supply.

Alternatives

Alternative Model

The following models are compatible alternatives with similar specifications or pinouts. Please verify details in the datasheet.

This table includes series-level reference items. Please confirm package, ratings, and fuse characteristics with engineering before bulk procurement.

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Brand

Alternative Model	Brand	Encapsulate	Rated Value	Description
ITV Series	Littelfuse	3-terminal SMD	12A3 2V DC	3-cell Battery Fuse: 12A / 15A / 22A options, 32V. Integrated heater for over-current and over-voltage protection. Select based on cell count.
SF Series	Dexerials	3-terminal SMD	12A3 2V DC	3-Terminal Lithium Protection Fuse, 1 2A Rating; verify based on battery series count and operating voltage.

ITV Series

LittelfuseSame packaging

Encapsulate: 3-terminal SMD
Rated Value: 12A/ 3 2V DC

Three-bank battery fuse, selectable as 12A/15A/22A; rated at 32V. Integrated heater enables overcurrent and overvoltage cutoff. Select based on the number of series cells.

SF Series

DexerialsSame packaging

Encapsulate: 3-terminal SMD
Rated Value: 12A/ 3 2V DC

3-terminal lithium battery protection fuse, 1 2A rating; verify based on battery cell count and operating voltage.

Rated voltage for red-highlighted models is below this product's specifications. Verify actual operating voltage before replacement.

Alternative models are for reference only. Please confirm final selection based on application requirements and datasheets. For further recommendations, feel free to submit an inquiry.

Similar

Similar models within the same parameter range

The following models belong to the same product category and have similar voltage, current, and other parameter ranges for comparison during selection.