Schurters's new High Current Fuse, HCF, is an extremely robust SMD fuse, designed using solid-state / thin-film technology. The HCF is especially suited for use in particularly harsh applications, where the reliable interrupt of high currents is critical.
Schurters's experience, acquired from the development of solid-state fuses for the space industry, and the cooperation with ESA, have led to the development of the HCF. The new HCF has a similar structure as the two ESA-certified types Schurter MGA-S and HCSF. Fuses used in Space applications meet the most rigorous performance requirements, with only the most advanced, most reliable technologies available. However, the intensive screening of each individual fuse, which is essential requirement for space applications, is not necessary with the HCF for non-Space applications. This leads to a substantial reduction in the cost per fuse.
Solid State / Thin Film Technology
In contrast to conventional fuses with a melting wire, the HCF has a metallic thin film layer. With this manufacturing technique, a metal layer is applied in conjunction with a so-called sputter. The two form on a glass substrate in an exact micrometer thickness. The resulting fuse element is enclosed with a ceramic housing, that guarantees the necessary stability and interrupt capacity. No harmful substances escape in solid or gaseous form during cutoff of the fuse. This technology also makes the SCHURTER HCF completely impermeable to potting compound, which can be used to achieve a hermetic seal e.g. for use in intrinsically safe applications according to ATEX and IECEx requirements.
High Breaking Capacity
The Schurter HCF has a high breaking capacity of up to 1000 A at 125 VAC resp. 125 VDC with fast response. It covers a rated current range from 5 A to 15 A.
Application Areas
Due to its robust design, the HCF fuse is particularly suited for applications which offer high reliability under particularly difficult conditions (thermal and mechanical shock, cycle endurance, etc.). Examples of possible applications: ATEX- and offshore oil and gas applications, equipment operated in sub-arctic regions, aviation electronics, and certain medical technology, where robust and space saving fuse performance is required. The temperature from -50 °C to 125 °C, as well as a vibration resistance – tested up to 1600g – make the HCF ideal for the most demanding high-performance applications under the most adverse conditions.
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With the new FUS fuseholder, Schurter is building on its successful FUL series for high-performance applications and presents the first dust and water-proof fuseholder with ingress degree of protection IP67 especially for rough applications. The snap-in fuseholder series guarantees fast and tool-free assembly. The carrier is available in both versions with slot and fingergrip and can accommodate fuse sizes 5 x 20 mm or 6.3 x 32 mm.
Thanks to the high IP67 degree of dust and water protection, the FUS series fuseholders can be used wherever high-performance applications are exposed to potentially adverse environmental influences, such as outdoor applications or in the oil and chemical industry, marine, laboratories and mining. In addition, the FUS series fuseholders are also used where the highest ingress protection against liquid and particles is required, as for instance in medical and food production equipment.
Made of halogen-free plastic, the side metal snap brackets act as heat dissipaters and are designed for fast snap-in mounting. Wires are terminated with quick-connect or solder connections. The newly styled fuse carriers accept 5 x 20 mm or 6.3 x 32 mm fuses, and provide slot or fingergrip removal for fuse replacement.
The FUS series already complies with the increased glow-wire material requirements outlined in the new IEC 60127-6 and IEC 60335-1 standards developed for unattended devices in use. The FUS fuseholders are characterized by a particularly high-quality design and a good price / performance ratio.
Technical Data
• Fuse holder according to IEC 60127-6 / UL 4248-1
• Rated specifications: IEC 16A @ 500 VAC (4 watt) / UL 32A @ 600 VAC / VDC
• Quick-connect connections 6.3 x 0.8 mm or solder connections
• Ambient temperature: -40 ° C to + 85 ° C
• Complies with the requirements of IEC 60335-1 for unattended devices in operation. This includes the stringent glow wire requirements according to IEC 60695-2-12 and -13
Applications
Equipment exposed to harsh industrial environments or the outdoors, measurement, laboratory and medical equipment, marine, dairy and food industries, robotics, controls in mining and underground.
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Schurter’s SHF 6.3x32 fuse provides higher voltage overcurrent and short circuit protection up to 1500 A @ 500 VAC / VDC within a wide range of rated currents in a universally accepted compact package size 6.3x32 mm, ¼” x 1 ¼”. The compact high performance fuse is ideally suited for primary AC circuit protection in 3-phase systems, HVAC systems, lighting and other industrial building and automation systems. The new VDC and current ratings up to 32 A provide primary protection in DC power systems for intelligent buildings, telecom centers, server farms and related peripheral systems. The combined AC and DC voltage ratings along with a detailed listing of breaking capacity ratings, and other precisely defined performance specifications, offer a highly reliable fuse approved for use in both alternating or direct current power applications.
The SHF 6.3x32 is available as a standard fuse link in 16 rated currents from 1 to 32 A. Versions up to 8 A are offered with pigtail leads for direct mounting on printed circuit boards. The standard fuse links can be used in a variety of panel or board mount fuse holders or clips for easy fuse replacement. SCHURTER also offers a full range of high current fuse holders and clips, compatible with the SHF, as well as its time-lag counterpart series SHT.
Direct compatibility with the most important competitive products, together with exceeding performance, makes the SHF 6.3x32 a form, fit, and function substitute product, as well as a fuse that fulfills newly defined application requirements, particularly those applications found in the area of DC power. The SHT 6.3x32 fuse is cURus approved and conforms to RoHS.
Technical Data / Approvals:
• Certification according to UL 248-14, CSA C22.2 no. 248.14
• High breaking capacity (H) up to 1500 A at rated voltage
• High rated voltages up to 500 VAC / VDC
• 16 rated currents from 1 A to 32 A
• Fast-acting (F) characteristics
Applications:
• High-power 3-phase systems
• Building automation: heating, ventilation and air conditioning (HVAC)
• Photovoltaic: protection between inverter and grid
• Frequency converters and ballasts
• Power distribution and uninterruptible power supplies in datacenters
• Higher voltage DC telecom and intelligent commercial building applications
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Schurter’s SHT 6.3x32 fuse provides higher voltage overcurrent and short circuit protection up to 1500 A @ 500 VAC and 400 VDC in a universally accepted compact package size 6.3x32 mm, ¼” x 1 ¼”. The compact high performance fuse is ideally suited for primary AC circuit protection in 3-phase systems, HVAC systems, lighting and other industrial building and automation systems. The new 400 VDC rating provides primary protection in DC power systems for intelligent buildings, telecom centers, server farms and related peripheral systems. The combined AC and DC voltage ratings along with a detailed listing of breaking capacity ratings, and other precisely defined performance specifications, offer a highly reliable fuse approved for use in both alternating or direct current power applications.
The SHT 6.3x32 is available as a standard fuse link in 16 rated currents from 1 to 32 A. Versions up to 10 A are offered with pigtail leads for direct mounting on printed circuit boards. The standard fuse links can be used in a variety of panel or board mount fuse holders or clips for easy fuse replacement. SCHURTER also offers a full range of high current fuse holders and clips, compatible with the SHT, as well as its fast-acting counterpart series SHF.
Direct compatibility with the most important competitive products, together with exceeding performance, makes the SHT 6.3x32 a form, fit, and function substitute product, as well as a fuse that fulfills newly defined application requirements, particularly those applications found in the area of DC power. The SHT 6.3x32 fuse is cURus approved and conforms to RoHS.
Technical Data / Approvals
- Certification according to UL 248-14, CSA C22.2 no. 248.14
- High breaking capacity (H) up to 1500 A at rated voltage
- High rated voltages up to 500 VAC / 400 VDC
- 16 rated currents from 1 A to 32 A
- Time-lag (T) characteristics
Application
- High-power 3-phase systems
- Building automation: heating, ventilation and air conditioning (HVAC)
- Photovoltaic: protection between inverter and grid
- Frequency converters and ballasts
- Power distribution for servers in datacenters
- Higher voltage DC telecom and intelligent commercial building applications
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Home Page: https://www.epreston.co.uk/epblog/
Schurter expands the UMT-H range with the rated currents 20A, 25A and 30A. They are now available from stock.
The compact SMD fuse UMT-H stands out with its high breaking capacity. With its square, compact design, it is the space saving alternative to classic cylindrically shaped cartridge fuses (e.g. 5x20 mm) and also suited for more cost-effective, automated assembly. Furthermore, SCHURTER is going to extend the UMT-H range this year by the rated currents 63 mA, 80 mA, 100 mA and 125 mA.
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The fuseholder standard IEC/EN 60127-6 has been revised to improve fire safety. Effective in October 2017, manufacturers of fuseholders will only be permitted to market products that have been tested and authorized in accordance with the updated standard. Schurter will offer its customers upgraded solutions by the deadline.
Requirements defined for the household appliance standard IEC 60335-1 are also being applied to the fuseholder standard IEC 60127-6. So the requirement with regard to the glow-wire resistance of the material is being increased. Schurter has planed the adaption of the products and its requalifying
and is currently deploying it. That means used materials has to be tested and if necessary replaced with new glow-wire resistant material. Thus these components can be used in unattended electrical household appliances after the change-over.
Besides the fuseholders, IEC appliance inlets and power entry modules with and without EMC filters are also affected if they have a fuse drawer. The order number of the products are not touched. Therefore manufactures using Schurter products do not have to change the approvals.
Detailed information about the revised fuseholder standard and Schurters plan for implementation are available upon request.
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Schurter expands the SHT 6.3x32 range of high voltage fuses with the rated currents 20A, 25A and 32A. The high breaking capacity of 1500 A at nominal voltage allows for interesting possibilities in new applications and protects people and electronic systems from overcurrent and potential fire outbreaks in case of short circuits.
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Schurter, a leading provider of fuseholders, expands its CSO heavy duty fuse clip family with a cost-effective tin-plated version. The CSO clip, designed for 10.3 mm diameter fuses, is suitable for applications with voltages up to 1500 VAC/VDC and currents to 32A. These unique characteristics are SCHURTER’s response to the increasing photovoltaic system voltage requirements.
The CSO clip is available in solder and screw/rivet versions. The solder version allows direct mounting on a printed circuit board by means of through-hole technology. The screw/rivet version provides additional flexibility for basic designs. Due to the special copper alloy all versions are characterized by a strong clamping force resulting in minimal power loss.
The CSO fuse clip is ideal for a wide range of PV and other DC applications including inverters, battery charge controllers, and string fuse holders. Furthermore, the CSO is well suited for applications in the e-mobility and industrial electronics sectors. The fuse clip conforms to RoHS specifications and is currently the only photovoltaic clip on the market with cURus approval.
Schurter also offers the ASO 10.3x38 PV fuse to fit the new CSO fuse clip. The fuse clip also supports other fuses with a 10.3 mm diameter of any length. This includes, for instance, 10.3x85 mm fuses for higher voltages.
Technical Features and Benefits:
- High rated voltage of 1500 VAC/VDC
- High rated current of 32 A
- Minimal power dissipation due to strong clamping force (special copper alloy)
- Solder, screw or rivet mounting
- cURus approval
Applications:
- Photovoltaic inverters
- String fuse holder
- Battery charge controllers
- DC applications
- Industrial electronics
- Drives
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Schurter expands the UMT-H range with the rated currents 12.5A and 16A. The compact SMD fuse stands out with its high breaking capacity of 1500A at rated voltage. With its square, compact design, the UMT-H is the space saving alternative to classic cylindrically shaped cartridge fuses (e.g. 5x20 mm) and also suited for more cost-effective, automated assembly.
Features:
* High voltage ratings up to 277 VAC / 250 VDC
* 19 rated currents from 160 mA to 16 A
* High breaking capacity of 1500 A
* Safe interruption at line voltage
* Smaller alternative to cylindrical 5 x 20 mm fuses
* Applications in explosive environments (IEC60079-11)
Applications:
* Primary protection on SMD PCBs
* Industrial electronics
* Sensors
* Power supplies
* Equipment subjected to explosion proof testing
* Lighting and other appliances connected to single phase 277 VAC in US market
.
The UMT-H range will be extended next year by the rated currents 20A, 25A and 32A.
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Schurter expands the SHT 6.3x32 range of high voltage fuses with the rated currents 12.5A and 16A.
The high breaking capacity of 1500 A at 500 VAC allows for interesting possibilities in new applications and protects people and electronic systems from overcurrent and potential fire outbreaks in case of short circuits.
Overview:
* Primary protection up to 500 VAC
* High breaking capacity of 1500 A @ rated voltage
* Time-lag (T) characteristic according to UL 248-14
* Wide range of fuse holders and clips available
* Dimensions: 6.3 x 32 mm
* Standards: UL 248-14
* Soon to announce rated currents 20A, 25A and 32A.
* Applications: 3-phase systems, photovoltaic, Building automation (HVAC), frequency converters and power electronics
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Home Page: https://www.epreston.co.uk/epblog/
© E. Preston (Electrical) Ltd 2025.
UK distributor of electrical and electronic components.
