BOURNS MF-USML270-2 Resettable Fuses-PPTC 6V 2.7A-HD 50A MAX
The BOURNS MF-USML270-2 is a high-performance resettable PPTC fuse designed for circuit protection applications. Manufactured in China, this device offers reliable overcurrent protection with a low resistance profile and a robust thermal response. It is RoHS compliant and packaged on a reel for easy automated placement.
Resettable PPTC fuse with a maximum voltage of 6V and current rating of 2.7A (hold) / 5.4A (trip)
Maximum trip current: 5.40A
Resistance at 23°C: 0.020Ω (typical)
Maximum resistance at trip: 0.020Ω
Maximum time to trip: 8 seconds at 23°C
Tripped power dissipation: 0.8W
Environmental operating temperature: -40°C to +85°C
RoHS compliant
Electrical Specifications
Model
V max. Volts
I max. Amps
Ihold
Itrip
Resistance (Ω)
Max. Time To Trip (seconds)
Tripped Power Dissipation (W)
MF-USML270
6
50
2.70
5.40
0.020
8.00
0.8
Environmental & Mechanical Characteristics
Operating Temperature: -40°C to +85°C
Storage Conditions: Before Opening +40°C max. / 70% RH max.; After Opening +40°C max. / 10% RH max.
Passive Aging: ±10% resistance change after 1000 hours at 85°C
Humidity Aging: ±15% resistance change after 100 hours at 85% R.H.
Thermal Shock: ±30% resistance change after 20 cycles from -40°C to +85°C
Vibration & Solvent Resistance: No change per MIL-STD standards
ESD Classification: Class 6 (HBM)
Additional Details
Designed for circuit protection in applications such as Li-ion batteries, game consoles, PC motherboards, USB ports, mobile phones, and digital cameras
Package includes reel with 5000 pcs.
Note: MF-USML models cannot be wave or hand soldered. Refer to soldering recommendations in datasheet.
For more detailed specifications and testing procedures, please refer to the datasheet. Users should verify device performance in their specific applications. The datasheet was not processed; please search the internet for the part number for more details.
I'm particularly impressed with how carefully the header pins are packed for the RP2350-PiZero, they arrived in perfect condition without any bent pins, which has been a persistent issue with other competitors. This attention to packaging detail really stands out.
I also received the latest A4 revision of the RP2350, which shows you maintain current inventory, that's really valuable for customers who want the most up to date components.
The delivery was quick and hassle free throughout. I'll definitely be recommending you to others!
App feedback: The discounts offered through the app are a nice bonus, but the component search function could be improved to match the ease of use on the website version. The rest of the app functions work well.
{"id":10019817357629,"title":"MF-USML270-2","handle":"mf-usml270-2","description":"\u003ch3\u003eBOURNS MF-USML270-2 Resettable Fuses-PPTC 6V 2.7A-HD 50A MAX\u003c\/h3\u003e\n\u003cp\u003eThe BOURNS MF-USML270-2 is a high-performance resettable PPTC fuse designed for circuit protection applications. Manufactured in China, this device offers reliable overcurrent protection with a low resistance profile and a robust thermal response. It is RoHS compliant and packaged on a reel for easy automated placement.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e MF-USML270-2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e BOURNS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e CN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit of Measure:\u003c\/strong\u003e EA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eECCN:\u003c\/strong\u003e EAR99\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Type:\u003c\/strong\u003e REEL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDatasheet:\u003c\/strong\u003e \u003ca href=\"https:\/\/www.waldomapac.com\/productfiles\/mf-bo\/mfusml.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eMF-USML Series Datasheet\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eResettable PPTC fuse with a maximum voltage of 6V and current rating of 2.7A (hold) \/ 5.4A (trip)\u003c\/li\u003e\n\u003cli\u003eMaximum trip current: 5.40A\u003c\/li\u003e\n\u003cli\u003eResistance at 23°C: 0.020Ω (typical)\u003c\/li\u003e\n\u003cli\u003eMaximum resistance at trip: 0.020Ω\u003c\/li\u003e\n\u003cli\u003eMaximum time to trip: 8 seconds at 23°C\u003c\/li\u003e\n\u003cli\u003eTripped power dissipation: 0.8W\u003c\/li\u003e\n\u003cli\u003eEnvironmental operating temperature: -40°C to +85°C\u003c\/li\u003e\n\u003cli\u003eRoHS compliant\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eElectrical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"5\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eV max. Volts\u003c\/th\u003e\n\u003cth\u003eI max. Amps\u003c\/th\u003e\n\u003cth\u003eIhold\u003c\/th\u003e\n\u003cth\u003eItrip\u003c\/th\u003e\n\u003cth\u003eResistance (Ω)\u003c\/th\u003e\n\u003cth\u003eMax. Time To Trip (seconds)\u003c\/th\u003e\n\u003cth\u003eTripped Power Dissipation (W)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMF-USML270\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e2.70\u003c\/td\u003e\n\u003ctd\u003e5.40\u003c\/td\u003e\n\u003ctd\u003e0.020\u003c\/td\u003e\n\u003ctd\u003e8.00\u003c\/td\u003e\n\u003ctd\u003e0.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEnvironmental \u0026amp; Mechanical Characteristics\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Temperature: -40°C to +85°C\u003c\/li\u003e\n\u003cli\u003eStorage Conditions: Before Opening +40°C max. \/ 70% RH max.; After Opening +40°C max. \/ 10% RH max.\u003c\/li\u003e\n\u003cli\u003ePassive Aging: ±10% resistance change after 1000 hours at 85°C\u003c\/li\u003e\n\u003cli\u003eHumidity Aging: ±15% resistance change after 100 hours at 85% R.H.\u003c\/li\u003e\n\u003cli\u003eThermal Shock: ±30% resistance change after 20 cycles from -40°C to +85°C\u003c\/li\u003e\n\u003cli\u003eVibration \u0026amp; Solvent Resistance: No change per MIL-STD standards\u003c\/li\u003e\n\u003cli\u003eESD Classification: Class 6 (HBM)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAdditional Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for circuit protection in applications such as Li-ion batteries, game consoles, PC motherboards, USB ports, mobile phones, and digital cameras\u003c\/li\u003e\n\u003cli\u003ePackage includes reel with 5000 pcs.\u003c\/li\u003e\n\u003cli\u003eNote: MF-USML models cannot be wave or hand soldered. Refer to soldering recommendations in datasheet.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor more detailed specifications and testing procedures, please refer to the \u003ca href=\"https:\/\/www.waldomapac.com\/productfiles\/mf-bo\/mfusml.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003edatasheet\u003c\/a\u003e. Users should verify device performance in their specific applications. The datasheet was not processed; please search the internet for the part number for more details.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLegal Disclaimers:\u003c\/strong\u003e See legal disclaimer at \u003ca href=\"https:\/\/www.bourns.com\/docs\/legal\/disclaimer.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ewww.bourns.com\/docs\/legal\/disclaimer.pdf\u003c\/a\u003e.\u003c\/p\u003e","published_at":"2025-08-11T17:20:23+05:30","created_at":"2025-08-11T17:20:24+05:30","vendor":"Waldom Electonics","type":"Circuit Protection","tags":["50A","6V","7A","BOURN","Circuit","IMPORT_CSV","PPTC","WLDM"],"price":6375,"price_min":6375,"price_max":6375,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":50608492413245,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"MF-USML270-2","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"MF-USML270-2","public_title":null,"options":["Default Title"],"price":6375,"weight":250,"compare_at_price":null,"inventory_management":"shopify","barcode":"MF-USML270-2","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/thinkrobotics.com\/cdn\/shop\/files\/MF-USML270-2_49868048_3c245193.jpg?v=1754913027"],"featured_image":"\/\/thinkrobotics.com\/cdn\/shop\/files\/MF-USML270-2_49868048_3c245193.jpg?v=1754913027","options":["Title"],"media":[{"alt":null,"id":45783840260413,"position":1,"preview_image":{"aspect_ratio":1.485,"height":200,"width":297,"src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/MF-USML270-2_49868048_3c245193.jpg?v=1754913027"},"aspect_ratio":1.485,"height":200,"media_type":"image","src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/MF-USML270-2_49868048_3c245193.jpg?v=1754913027","width":297}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch3\u003eBOURNS MF-USML270-2 Resettable Fuses-PPTC 6V 2.7A-HD 50A MAX\u003c\/h3\u003e\n\u003cp\u003eThe BOURNS MF-USML270-2 is a high-performance resettable PPTC fuse designed for circuit protection applications. Manufactured in China, this device offers reliable overcurrent protection with a low resistance profile and a robust thermal response. It is RoHS compliant and packaged on a reel for easy automated placement.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e MF-USML270-2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e BOURNS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e CN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit of Measure:\u003c\/strong\u003e EA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eECCN:\u003c\/strong\u003e EAR99\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Type:\u003c\/strong\u003e REEL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDatasheet:\u003c\/strong\u003e \u003ca href=\"https:\/\/www.waldomapac.com\/productfiles\/mf-bo\/mfusml.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eMF-USML Series Datasheet\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eResettable PPTC fuse with a maximum voltage of 6V and current rating of 2.7A (hold) \/ 5.4A (trip)\u003c\/li\u003e\n\u003cli\u003eMaximum trip current: 5.40A\u003c\/li\u003e\n\u003cli\u003eResistance at 23°C: 0.020Ω (typical)\u003c\/li\u003e\n\u003cli\u003eMaximum resistance at trip: 0.020Ω\u003c\/li\u003e\n\u003cli\u003eMaximum time to trip: 8 seconds at 23°C\u003c\/li\u003e\n\u003cli\u003eTripped power dissipation: 0.8W\u003c\/li\u003e\n\u003cli\u003eEnvironmental operating temperature: -40°C to +85°C\u003c\/li\u003e\n\u003cli\u003eRoHS compliant\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eElectrical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"5\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eV max. Volts\u003c\/th\u003e\n\u003cth\u003eI max. Amps\u003c\/th\u003e\n\u003cth\u003eIhold\u003c\/th\u003e\n\u003cth\u003eItrip\u003c\/th\u003e\n\u003cth\u003eResistance (Ω)\u003c\/th\u003e\n\u003cth\u003eMax. Time To Trip (seconds)\u003c\/th\u003e\n\u003cth\u003eTripped Power Dissipation (W)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMF-USML270\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e2.70\u003c\/td\u003e\n\u003ctd\u003e5.40\u003c\/td\u003e\n\u003ctd\u003e0.020\u003c\/td\u003e\n\u003ctd\u003e8.00\u003c\/td\u003e\n\u003ctd\u003e0.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEnvironmental \u0026amp; Mechanical Characteristics\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Temperature: -40°C to +85°C\u003c\/li\u003e\n\u003cli\u003eStorage Conditions: Before Opening +40°C max. \/ 70% RH max.; After Opening +40°C max. \/ 10% RH max.\u003c\/li\u003e\n\u003cli\u003ePassive Aging: ±10% resistance change after 1000 hours at 85°C\u003c\/li\u003e\n\u003cli\u003eHumidity Aging: ±15% resistance change after 100 hours at 85% R.H.\u003c\/li\u003e\n\u003cli\u003eThermal Shock: ±30% resistance change after 20 cycles from -40°C to +85°C\u003c\/li\u003e\n\u003cli\u003eVibration \u0026amp; Solvent Resistance: No change per MIL-STD standards\u003c\/li\u003e\n\u003cli\u003eESD Classification: Class 6 (HBM)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAdditional Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for circuit protection in applications such as Li-ion batteries, game consoles, PC motherboards, USB ports, mobile phones, and digital cameras\u003c\/li\u003e\n\u003cli\u003ePackage includes reel with 5000 pcs.\u003c\/li\u003e\n\u003cli\u003eNote: MF-USML models cannot be wave or hand soldered. Refer to soldering recommendations in datasheet.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor more detailed specifications and testing procedures, please refer to the \u003ca href=\"https:\/\/www.waldomapac.com\/productfiles\/mf-bo\/mfusml.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003edatasheet\u003c\/a\u003e. Users should verify device performance in their specific applications. The datasheet was not processed; please search the internet for the part number for more details.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLegal Disclaimers:\u003c\/strong\u003e See legal disclaimer at \u003ca href=\"https:\/\/www.bourns.com\/docs\/legal\/disclaimer.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ewww.bourns.com\/docs\/legal\/disclaimer.pdf\u003c\/a\u003e.\u003c\/p\u003e"}
