MF-FSML125/8-2 Bourns Resettable Fuse (Fuses Chip) In Stock

Name: MF-FSML125/8-2
Brand: Bourns
SKU: MF-FSML125/8-2
Availability: InStock

Bourns MF-FSML125/8-2 is a surface mount resettable PTC fuse chip in a compact 1.85 x 1.05 x 0.7 mm SMT package, providing overcurrent and overtemperature protection for USB ports, battery packs, and portable electronic circuits.

ACTIVEResettable FuseVerified Jun 2026

Package / Visual Reference

MF-FSML125/8-2Fuses Chip

Quick Facts

Manufacturer: Bourns
Package: Fuses Chip
Pin Count: 2
Lifecycle: ACTIVE
Datasheet: MF-FSML125/8-2 Datasheet PDF
Category: Resettable Fuse
Price: From $0.3340(MOQ 1)
Temp Range: -40.0°C to 85.0°C
RoHS: Compliant
Lead Time: 3–7 business days
Shipping: DHL Express · Worldwide

What are the key features of MF-FSML125/8-2?

Resettable PTC fuse with automatic recovery after overcurrent fault clearance, eliminating manual fuse replacement
Ultra-compact SMT chip package (1.85 x 1.05 x 0.7 mm) for space-constrained PCB designs
Minimum resistance specified at 23°C for accurate hold current and circuit protection modeling
REACH compliant and lead-free (JESD-609 e4) for modern electronics manufacturing
Surface mount mounting for automated reflow soldering in high-volume production

What is MF-FSML125/8-2 used for?

The MF-FSML125/8-2 is designed for overcurrent protection in USB ports, lithium-ion battery packs, and portable consumer electronics where automatic reset after fault removal is required. Its compact 1.85 mm x 1.05 mm SMT footprint also makes it suitable for space-constrained designs in IoT sensors, wearables, and industrial handheld devices needing passive self-resetting protection.

What are the specifications of MF-FSML125/8-2?

Reach Compliance Code	Compliant
Factory Lead Time	14Weeks
YTEOL	8
Additional Feature	RMIN AT 23 DEG CEL
JESD-609 Code	e4
Mounting Feature	SURFACE MOUNT
Package Height	0.7mm
Package Length	1.85mm
Package Style	SMT
Package Width	1.05mm
Packing Method	TR, 7 INCH
Reference Standard	CUL, TUV, UL
Resistance	0.02Ω
Resistor Type	PTC RESETTABLE FUSE
Surface Mount	YES
Terminal Finish	Gold (Au) - with Nickel (Ni) barrier
Terminal Placement	DUAL ENDED
Terminal Shape	WRAPAROUND
Working Voltage	8V
Package	Fuses Chip

Compliance & Regulatory

RoHS Status	Compliant
Lead-Free	Yes (Pb-Free)
ECCN	EAR99
HTS Code	8533.40.80.70
Country of Origin	Mainland China

Where can I find the MF-FSML125/8-2 datasheet?

MF-FSML125/8-2 Datasheet Download

Official datasheet from Bourns

What are equivalent replacements for MF-FSML125/8-2?

No known alternates. Submit an RFQ and our team can suggest alternatives.

Frequently Asked Questions

How does MF-FSML125/8-2 protect USB ports from overcurrent conditions in portable devices?

The MF-FSML125/8-2 is a resettable PTC fuse that trips when current exceeds its hold current threshold, typically around 1.25 A, interrupting the fault path and automatically resetting after the overcurrent condition is removed and the device cools.

What are the physical dimensions of the MF-FSML125/8-2 chip package for PCB footprint planning?

The MF-FSML125/8-2 measures 1.85 mm in length, 1.05 mm in width, and 0.7 mm in height, fitting an industry-standard SMT chip footprint that is compatible with 0603 or similar compact surface mount land patterns on standard PCBs.

Why does MF-FSML125/8-2 specify minimum resistance at 23°C and how does this affect circuit design?

The minimum resistance at 23°C allows designers to calculate the fuse's contribution to circuit impedance accurately. For the MF-FSML125/8-2, knowing the PTC resistance at room temperature helps set correct hold current margins to prevent nuisance tripping across all 8 units in a multi-channel protection design.

What is the factory lead time for MF-FSML125/8-2 and how should procurement teams manage supply planning?

The factory lead time for MF-FSML125/8-2 is 14 weeks, so procurement teams should buffer stock or place purchase orders at least 4 months in advance, especially for production volumes requiring continuous supply of this REACH-compliant SMT fuse.

Related Guides

C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC

Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.

Aug 4, 2026

STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security

Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.

Aug 4, 2026

STM32H753VIT6 High-Performance MCU Design Guide

Practical STM32H753VIT6 design guidance for power, clocks, memory, DMA, PCB layout, bring-up, and production recovery.

Aug 3, 2026

STM32H753ZIT6 Selection Guide for High-Performance Embedded Systems

Select the STM32H753ZIT6 by evaluating compute, memory, LQFP144 pinout, power, interfaces, security, and sourcing requirements.

Aug 3, 2026

Why Buy from FindMyChip

Authorized Source

Verified supply chain with full traceability & inspection

Competitive Pricing

Factory-direct from China distributors, low MOQ

Fast Shipping

DHL Express 3–5 days · FedEx/UPS 5–7 days worldwide

Quality Guaranteed

30-day replacement for defective parts, no questions asked

About Bourns

Bourns is a leading electronic component manufacturer. FindMyChip sources Bourns ICs directly from authorized China distributors, offering competitive pricing and reliable stock.

View all Bourns parts →

More from Bourns

PTV09A-4015F-B104

Other

Variable Resistor

3296W-1-105LF

Other

Variable Resistor

3352E-1-105LF

Other

Variable Resistor

CR0603-JW-151ELF

Resistor Chip

Resistor

CR1206-FX-5231ELF

Resistor Chip

Resistor

SMAJ10A

Diodes Moulded

TVS Diode (Uni-directional)

AvailabilityIn Stock

Reference Price (USD)

From $0.3340

Buy from 1pc · Factory-direct pricing

Qty.	Unit Price	Ext. Price
1+	$1.0400	$1.04
3000+	$0.6400	$1920.00
4500+	$0.5067	$2280.15
6000+	$0.3340	$2004.00

pcs

Unit price: $1.0400 · Total: $1.04

In Stock · 24h Response · Worldwide Shipping

Direct Contact

WhatsApp Inquiry Email RFQ

Lead Time3-7 business days

MOQFrom 1 piece

ShippingDHL / FedEx / UPS

OriginChina (Authorized)

Response within 24 hours · Worldwide shipping

“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”

Sarah Kim

VP Engineering, NovaBit Electronics, South Korea

MF-FSML125/8-2 Bourns Resettable Fuse (Fuses Chip) In Stock

What are the key features of MF-FSML125/8-2?

What is MF-FSML125/8-2 used for?

What are the specifications of MF-FSML125/8-2?

Compliance & Regulatory

Where can I find the MF-FSML125/8-2 datasheet?

What are equivalent replacements for MF-FSML125/8-2?

Frequently Asked Questions

How does MF-FSML125/8-2 protect USB ports from overcurrent conditions in portable devices?

What are the physical dimensions of the MF-FSML125/8-2 chip package for PCB footprint planning?

Why does MF-FSML125/8-2 specify minimum resistance at 23°C and how does this affect circuit design?

What is the factory lead time for MF-FSML125/8-2 and how should procurement teams manage supply planning?

Related Guides

C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC

STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security

STM32H753VIT6 High-Performance MCU Design Guide

STM32H753ZIT6 Selection Guide for High-Performance Embedded Systems

Why Buy from FindMyChip

About Bourns

More from Bourns

You May Also Like