MF-USML300/12-2

$0.69

Description：PTC RESET FUSE 12V 3A 1210
Series：Multifuse®, MF-USML/X
Mfr：Bourns Inc.
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:91936caf4bd3 Category: PTC Resettable Fuses Brand: Bourns Inc.

Consult the customer manager about the wholesale price.

consultation hotline：86-132-6715-2157

email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.

Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.

Product introduction

Product Detailed Parameters

Description：PTC RESET FUSE 12V 3A 1210
Series：Multifuse®, MF-USML/X
Mfr：Bourns Inc.
Package：Tape & Reel (TR),Cut Tape (CT)
Type：Polymeric
Voltage - Max：12V
Current - Hold (Ih) (Max)：3:00 AM
Current - Trip (It)：6:00 AM
Current - Max：50 A
Time to Trip：5 s
Resistance - Initial (Ri) (Min)：3 mOhms
Resistance - Post Trip (R1) (Max)：24 mOhms
Operating Temperature：-40°C ~ 85°C
Grade：-
Qualification：-
Ratings：-
Mounting Type：Surface Mount
Package / Case：1210 (3225 Metric), Concave
Size / Dimension：0.127" L x 0.101" W (3.22mm x 2.58mm)
Height - Seated (Max)：-
Thickness (Max)：0.047" (1.20mm)
Lead Spacing：-

Download product information

MF-USML300/12-2

Overview

The Bourns MF-USML300/12-2 is a resettable polymeric positive temperature coefficient (PPTC) device from the Multifuse MF-USML/X series. It features a 12VDC voltage rating and a holding current of 3A, with a trip current of 6A. The component supports a maximum current rating of 50A and operates within a temperature range of -40°C to +85°C. Housed in a 1210 (3225 Metric) surface-mount package, it measures 3.43mm in length and 1.2mm in height. The device is moisture sensitive and contains no SVHC.

Feature Summary

Provides overcurrent protection through automatic reset functionality upon cooling
Designed for surface-mount assembly in compact electronic circuits
Constructed from polymeric material that increases resistance during fault conditions

Applications

Consumer electronics power line protection
Portable device circuit safeguarding
General industrial control system overcurrent defense

Procurement Notes

Verify the specific part number suffix against official Bourns documentation to ensure correct voltage and current ratings. Confirm moisture sensitivity level requirements for your manufacturing process. Check for any recent updates to the datasheet regarding environmental compliance or package dimensions before finalizing procurement orders.

Selection Notes

Select this component when a low-profile, surface-mount resettable fuse is required for 12VDC systems. Ensure the application current remains below the 3A holding threshold under all operating conditions. Consider the 1210 footprint constraints and verify thermal management capabilities for the intended environment.

Part Context

This device belongs to the Bourns Multifuse MF-USML/X series of PPTC resettable fuses. These components are engineered for high-reliability applications requiring repeated overcurrent protection without manual replacement. The series offers various current ratings and voltage options to suit diverse circuit protection needs.

Replacement Considerations

Consult official Bourns substitution guides for compatible alternatives. Verify that any substitute matches the 12VDC rating, 3A holding current, and 1210 package dimensions. Ensure the replacement maintains equivalent trip characteristics and operating temperature ranges.

How to buy

Online and offline orders are supported. If the item is available for online purchase, you can place it in the cart; for wholesale pricing, please contact our product manager for a quote.

Payment Method

Payment methods: T/T, WeChat Pay, credit cards, Google Pay, Apple Pay . Buyer covers shipping, fees, duties, and taxes; contact our product manager if you need a contract/procurement process.

Delivery time

In-stock items usually ship within 24 hours. Otherwise, shipment is arranged 1 to 2 days after the items arrive at our warehouse. Timing depends on destination and shipping method.

Freight calculation

Freight cost depends on destination, package size, and weight . We offer shipping options via DHL, FedEx, UPS, and TNT , and can ship using your freight account upon request.

Mode of Transportation

We ship via DHL, FedEx, UPS, and TNT. If you prefer a specific logistics provider, we can ship using your designated carrier.

Return and Refund

Returns are accepted within 60 days of invoice with RMA approval. Items must be resalable; original invoice and test report are required. No returns for customer errors.