Safe Tripping of High-Energy Overcurrent in SELV Voltage Level
• Very high breaking capacity of up to 3000 A
• Safe tripping in 15 s at twice the rated current
• Operating temperature range from -55 °C to 125 °C

With the increased availability of low-cost, high-performance lithium-ion battery cells, there is a growing need to manage higher and higher currents via low-cost, SMD-assembled PCBs.

The dedicated Schurter UHP fuse with rated currents of 50 to 100 A ideally meets the requirements for high breaking capacity and fast tripping in the event of overcurrents by galvanically separating these immense energies stored in Li-Ion batteries in a controlled manner.

Market Situation
With the success of the smartphone, Li-Ion batteries have gained enormously in importance. They are also the key to the success of the even more energy-intensive electric cars, which rely on this very technology. The price per kilowatt hour of a Li-Ion battery pack has fallen to a tenth in the last decade!

Power ∼ Current2
The higher the current on a PCB, the more power must be converted and also dissipated. It is therefore particularly important for such applications to have a reliable fuse that is capable of galvanically separating the circuit in time in case of an overcurrent. The UHP fuse developed by Schurter especially for this purpose disconnects the circuit at twice the rated current within a maximum of 15 seconds and ensures that the circuit board can be built more economically and in a space-saving manner.

High Energy Short Circuit
Li-ion batteries are capable of storing very high amounts of energy and releasing it again within a very short time - for instance in the event of a short circuit. The low internal resistance of the cells can lead to short-circuit currents of up to 3000 A, depending on the configuration. The UHP fuse is built so robustly that it can withstand such high currents at the SELV (Safety Extra Low Voltage) voltage level of up to 63 VDC, and even at 80 VDC it can still provide a performance of up to 2000 A.

Extreme Temperature Range
The UHP is designed to operate at ambient temperatures from -55 °C to +125 °C. This makes it ideally suited for applications in the automotive sector, but also for other applications with potentially large temperature variations.

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Through-Hole OGN Fuse Holder for Fully Automated PCB assembly
• Suitable for fully automated PCB assembly
• Reflow capable
• Fully backwards compatible with OGN for THT
• Available with blister tape packaging

The Schhurter OGN fuse holder is a product that has proven itself over decades and has been continuously improved and expanded with new variants. It started with a THT version (Through-Hole Technology), followed by one for SMT (Surface-Mounting Technology). Now Schurter is introducing a third option, which closes the last gap: THR (Through-Hole Reflow).

Highly integrated electronic circuits are almost exclusively assembled with SMT components and soldered in a reflow oven. However, it is sometimes necessary to include THT components on the circuit board. This has a decisive disadvantage: THT components need to be soldered differently, a second soldering process is necessary.

The Solution: THR
In fact, THR components are through-hole components. They are specially designed for automated assembly and high thermal stress in the reflow oven. During the assembly process, a paste is first printed into the vias for the THT pins, and then the component is pushed through the solder paste. As the paste melts in the reflow oven, the liquid solder retracts into the vias due to wetting and capillary forces and forms the solder joint.

OGN: The Classic
The open fuse holder OGN is designed for 5x20 fuses of various types. It naturally complies with the tightened rules of glow wire resistance according to IEC 60335-1. If desired, it can be converted into a closed fuse holder by means of an optionally available cover.

Preassembled Variants to Follow:
In the near future Schurter will offer the OGN for THR pre-assembled with a 5x20 fuse in blister packaging (tape & reel). This according to customer requirements for fully automated PCB assembly. Just as Schurter is already doing with the OGN for SMT today.

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Bulgin is widely recognised as a leading manufacturer of environmentally sealed connectors & components.

With 100 years of experience in the industry, Bulgin continues to innovate & develop products & services to cater for its global customer base across a variety of markets.

With ambient & environmental conditions such as water, moisture & extreme temperatures posing a constant threat to transport & infrastructure applications, reliable & robust solutions are vitally important in this sector.

From outdoor lighting & industrial meters to HVAC systems & surveillance cameras, rest assured that our industry leading solutions are built for maximum reliability & performance to support the challenging needs of various indoor, outdoor & industrial applications.

Heavy duty machinery used for construction & building maintenance require components that are equally as rugged as the environments that they operate in. From outdoor lighting & industrial meters to indoor HVAC systems, rest assured that our wide range of switches, indicators & waterproof connectors are built for maximum reliability & performance.

Applications:
• Air Compressors
• Cherry Pickers
• Wireless Load Sensors
• Terrain / Mud Monitoring Systems
• Smart Metering
• Security Door Switch Panels
• Moisture Meters
• Heating Systems
• Air Cleaning Systems
• Disabled Refuge Systems
• CCTV Cameras

Enquiry Form: https://www.epreston.co.uk/contact/

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New DFH02 plastic PCB fuse holder with optional transparent insulation cover from Hylec for PCB and thru-hole mounting

Vertical orientation; 22.6mm pitch, UL94V-2 polycarbonate cover

Hylec-APL, the specialist supplier of electrical components and enclosures, has launched a new 5mm x 20mm PCB fuse holder, the DFH02, for either PCB or thru-hole mounting. The DFH02 features a transparent insulation cover which provides protection for the fuse and makes installation and removal simple. This style of fuse holder is the most popular and best-selling type of fuse holder on the market.

Suitable for use in all types of circuits, Hylec’s DFH02 PCB fuse holders provide a secure and safe method for mounting fuses on all types of PCBs and eliminate the problems associated with using fuse clips on a PCB. Easier to install than fuse clips, DFH02 fuse holders are also low-cost and ensure a reliable electrical and mechanical connection.

The 22.6mm pitch DFH02 can be mounted direct to the PCB in horizontal orientation or thru-hole mounted for vertical orientation. Electrical rating is 6.3A at 250VAC maximum.

The base material is thermoplastic, PA66 glass-filled, offering mechanical strength and excellent dimensional stability. It meets UL94V-0 flame-retardancy standards. The transparent insulation cover is rated UL94-V2.

Dimensions of the DFH02 base are: 13.5mm high off the PCB, width 9.0mm, 22.0mm long. Pin pitch is 22.6mm. Total height with cover off the PCB is 15.0mm.

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SMD Ceramic Fuse with Very High Breaking Capacity
• 26 rated currents from 0.16 to 50 A
• International approvals
• Time-Lag T characteristic
• Impermeable to potting compound

The well introduced SMD ceramic fuses of the UMT-H family have been expanded in the form of a 40 A and a 50 A version. Schurter now offers the UMT-H with its Time-Lag T characteristic in a total of 26 rated currents between 160 mA and 50 A.

The UMT-H SMD ceramic fuse now covers a current range from 160 mA to 50 A at voltages of up to 277 VAC and 250 VDC. This makes the cuboid fuse ideal for cost-efficient automated assembly. Its large solder pads ensure excellent heat dissipation.

Applications
The UMT-H was specially developed for primary protection in industrial electronics at nominal voltages of up to 277 VAC. Additional areas of application are energy supply, medical technology and telecommunications as well as e-mobility. New market developments show that currents of 40 A and 50 A are increasingly needed for battery-powered applications.

High Inrush Currents
The UMT-H is predestined for use in applications with high inrush currents (e.g. motors) due to its Time-Lag T characteristic. But also newer applications, which increasingly rely on powerful accumulators, often require slow tripping.

Impermeable to Potting Compound
The UMT-H remains tight with most commercially available potting compounds. Therefore, this fuse is especially suitable for high demands. In addition, the high breaking capacity of 1500 A and the cap distance of >10 mm make the UMT-H the ideal choice for explosion protection.

Enquiry Form: https://www.epreston.co.uk/contact/

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CFO Fuse Clip Series:  As THT Version or with M3 Bore for Screw and Rivet Mounting
• Designed for high rated voltages
• Excellent price-performance ratio
• Low mounting height

The CFO fuse clip series is designed for fuses with 10.3 mm diameter and is available as M3 version for screw and rivet mounting or alternatively for THT.

High performance
The new CFO fuse clip series is suitable for applications with voltages up to 1000 VDC / 600 VAC and currents up to 16 A (UL). The operating range extends from -40 ºC to 125 ºC.

Economical
All variants of the CFO fuse clip series offer an excellent price-performance ratio. The clips are made of brass and are available with nickel or tin plating.

Flexible
Suitable for (almost) every application: Whether a classic THT or screw/rivet mounting is required, with the CFO series you will find your matching fuse clip. Also, thanks to their low mounting height, they can
be installed anywhere.

Applications
Due to its high voltage rating, the CFO fuse clips are suitable for a particularly wide range of applications: These include for example photovoltaic and DC high voltage applications in general. Furthermore, the CFO series is of course also suitable for classical industrial and consumer electronics, battery chargers and power distribution applications.

Enquiry Form: https://www.epreston.co.uk/contact/

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Bulgin’s extensive range of fuse holders are designed to give the high degree of protection demanded in today’s sophisticated electronic equipment. Carrying world-wide safety approvals from UL, VDE, CSA and IMQ, all types are manufactured from high grade flame retardant nylon and polyester materials.

Available in a variety of mounting options including panel mount, PCB & base mount, these compact and shock safe fuse holders are ideal solutions for 5 x 20mm, 6.3 x 25mm and 6.3 x 32mm fuses.

Enquiry Form: https://www.epreston.co.uk/contact/

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SCO Family Fuse Clip: New option with M5 Borehole for Screw and Rivet Mount
• Special copper alloy material for high efficiency
• Very low contact resistance
• Minimal power dissipation due to strong clamping force
• Ideal for use in high power applications like EVcharging

Schurter, a leading supplier of fuseholders, is expanding its high-performance fuse clips of the CSO family for 10.3 mm diameter fuses with an M5 version for screw and rivet mounting. Thanks to its excellent material properties, the CSO clip is suitable for applications with voltages up to 1500 VAC/VDC and currents up to 32 A.

Due to the use of a special copper alloy, all versions of the CSO series are characterized by a strong clamping force. This results in minimal power dissipation, which is particularly essential for applications with high currents where power losses must be minimized wherever possible.

Ideal for E-Mobility
The CSO clip offers a very wide range of applications. With a typical contact resistance of ≤ 1 mΩ it is also ideally suited for use in e-mobility charging stations (AC and DC) and other high-current applications.

Even more flexibility
The addition of an M5 mounting version to the CSO family significantly increases flexibility in a wide range of applications. Thanks to this, the proven CSO clips are now suitable for additional applications where, for example, fastening with M5 screws is required.

The CSO clips are characterized by following key data:
• High nominal voltage up to 1500 VAC/VDC
• High nominal currents up to 32 A
• Minimal power dissipation due to strong clamping force
• Very low contact resistance of ≤ 1 mΩ
• Solder, screw or rivet mounting
• Ideal for use in high power applications

The CSO-Clips are compatible with the following SCHURTER fuses:
• AEO 10.3x38
• ASO 10.3x38
• ESO 10.3x38

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Super Time-Lag SMD ceramic fuse with selective tripping characteristic

• Suitable as a Fail Safe Device
• Very high melting integral
• Precisely defined melting times (min/max)
• Compact construction

With the UMT-W, Schurter launches a pulse-proof SMD ceramic fuse with super time-lag tripping characteristics, which is particularly suitable as a fail-safe device in demanding applications.

The cuboid shaped (5.3 x 16 mm), extremely compact SMD fuse is available in five rated currents from 5 A to 20 A and reaches rated voltages of up to 125 V AC&DC with a breaking capacity of up to 1000 A. All these you get with a super slow and precisely defined melting characteristic unique for SMD fuses.

Applications
The Schurter UMT-W is recommended wherever high inrush currents flow (e.g. motor control systems). The UMT-W is particularly suitable for applications with long cables (e.g. avionics), which are often primarily protected by an electronic fuse. If this monitoring fails, or does not perform its task correctly, the UMT-W takes over as a fail-safe device and transfers the system to a safe, currentless state. Due to the precise melting times with its precisely defined min/max corridor at 4xIn, robust and selective safety concepts can be implemented on top of the electronic fuse.

COTS+ The UMT-W fuse is a "COTS+" product. The "+" comes from extended fuse qualification tests (e.g. AEC-Q200) and highly controlled manufacturing processes, which are available to all SCHURTER customers. For higher reliability requirements, we also offer visual inspection according to MIL-PRF 55342, different types of up-screenings (burn-in) and detailed test reports on request.

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SMD Fuse for Electromobility Applications

• Extended rated current range with 15 A
• Ideal for electromobility applications
• Cycle resistant with quick characteristics
• Halogen-free and RoHS-compliant

The proven UMF 250 SMD fuse family gets extended by a 15 A version. SCHURTER is now offering the UMF 250 in a total of 15 rated currents between 500 mA and 15 A. It is particularly suitable for electromobility applications with higher rated currents.

With its quick characteristics (small melting integral) according to IEC 60127-4, the UMF 250 is the logical addition to the successful UMT 250 range. It is sealed against potting compound to achieve a hermetic seal for use in intrinsically safe applications according to ATEX and IECEx requirements. Thanks to its high cycle stability and minimal temperature derating, it is extremely robust and aging resistant.

Applications
Thanks to its low internal resistance, the UMF 250 is ideally suited for primary and secondary protection on SMD circuit boards. Applications of the UMF 250 include the protection of battery-powered systems with high switch-off capacities of 500 A @ 125 VDC (e.g. electromobility). The fuse is also suitable for primary protection in the AC range, for example in voltage regulator modules and charging stations.

For Lead-Free Soldering Processes
The UMF 250 is a halogen-free and RoHS-compliant fuse for lead-free soldering processes. The solder surface compatibility with the most important competitor products allows Schurter to offer the UMF 250 as a replacement product. The fuse is cURus approved. Available in 100 pcs plastic bag or 2000 pcs tape and reel packaging.

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