| | | |

Bourns Adds 1812 Package Size Model Series with 125 °C Ratings to its Multifuse Line of PPTC Overcurrent Protectors


March 1, 2021

Bourns, Inc. recently announced the addition of a new model series to its leading Multifuse Polymer Positive Temperature Coefficient (PPTC) resettable fuse product line. The new Bourns Multifuse MF-MSHT models are high temperature rated, automotive grade AEC-Q200 compliant and available in a standard 1812 surface mount package. In addition, the MF-MSHT model series features a low thermal derating factor, a maximum voltage range of 9 V – 42 V, and a hold current range of 200 mA – 1.75 A.

Increasing electronics content in vehicles and connected industrial and consumer IoT-based appliances are requiring more robust overcurrent protection solutions that can support higher ambient operating temperatures and reliable, long-life performance. Bourns designed its latest Multifuse MF-MSHT model family to provide effective overcurrent protection with a reduced risk of generating nuisance tripping at elevated temperatures up to 125 °C in these high-growth applications. Providing additional design flexibility, these new high temperature rated PPTCs give designers a wider selection of overcurrent protection solutions that help them best match their application specifications.

“Designers of a variety of automotive grade applications will find the 125 °C rating of the MF-MSHT series a robust choice for overcurrent protection that supports their broad temperature requirements”, said Lee Bourns, Product Line Manager for Overcurrent Protection at Bourns.

The new polymer PTC models are constructed using a proprietary blend of high melting point polymer materials and carbon-based conductive fillers to achieve high reliability overcurrent protection performance particularly tailored for high temperature environments. The proprietary conductive polymer formulation also provides an elevated level of resistance to commonly found oils, lubricants and solvents that can cause adverse effects to consumer-grade PTCs often used in industrial and transportation applications.

Bourns adds, “The polymer we use in our high temperature families is advantageous to demanding designs as it offers heightened protection against solvent penetration. Solvents can cause resistance drift in a variety of polymer-based resistive components including PPTCs. This increase in resistance may, in turn, generate undesirable nuisance tripping by the PPTC because less current is required to trip the device. Our high temperature rated MF-MSHT model family helps address this concern for certain harsh environment system designers.”

The new Bourns Multifuse MF-MSHT Polymer PTC model series is available now, is UL, TÜV, and RoHS compliant*, and is produced in a Bourns IATF 16949 certified facility.




Related Articles

Network Infrastructure Featured Product Spotlight

PBUS 14 Panduit logo 400

This webinar presented by Beth Lessard and Keith Cordero will be highlighting three Panduit solutions that will optimize network equipment and cabling to ensure that your spaces are efficiently and properly managed to support ever-evolving business needs of today and beyond. Products that will be featured include PanZone TrueEdge Wall Mount Enclsoure, Cable Managers, and Adjustable Depth 4-Post Rack.


Editor’s Pick: Featured Product News

Siemens: SIMOVAC Non-Arc-Resistant and SIMOVAC-AR Arc-Resistant Motor Controllers

The Siemens SIMOVAC medium-voltage non-arc-resistant and SIMOVAC-AR arc-resistant controllers have a modular design incorporating up to two 12SVC400 (400 A) controllers, housed in a freestanding sheet steel enclosure. Each controller is UL 347 class E2, equipped with three current-limiting fuses, a non-load-break isolating switch, and a fixed-mounted vacuum contactor (plug-in type optional for 12SVC400). The enclosure is designed for front access, allowing the equipment to be located with the rear of the equipment close to a non-combustible wall.

Read More

Sponsored Content
Electrify Your Enterprise

Power is vital to production, and well-designed control cabinets are key. Allied Electronics & Automation offers a comprehensive collection of control cabinet solutions including PLCs, HMIs, contactors, miniature circuit breakers, terminal block connectors, DIN-rail power supplies, pushbutton switches, motor starters, overloads, power relays, industrial Ethernet switches and AC drives engineered to keep your operations running safely, reliably and efficiently.

Learn more HERE.

Products for Panel Builders