ULTRA rapid® (UR) — fast-acting fuses for semiconductor protection URZ / URB / URM / URS
Country: Germany · Model: ULTRA rapid UR (URZ / URB / URM / URS)
ULTRA rapid (UR) fast-acting fuses protect IGBTs, MOSFETs, thyristors and diodes from short-circuit currents. The range includes the URZ, URB, URM, URS and URE versions and the aR, gR, gRL, gS and gPV categories. They are installed in frequency converters, rectifiers, inverters and UPS, where every millisecond decides whether the power module survives.
- Versions
- URZ — cylindrical; URB — with screw terminals (NH000 DIN80); URM — with blade contacts (NH1, NH2); URS — square; URE — British standard
- Categories
- aR, gR, gRL, gS, gPV
- Examples
- URB 2055804: NH000, AC 660 V, 16–160 A, gR/aR; URM 2055604: NH1, DC 750 V, 32–160 A, gR
- Materials
- fine-grain silver fuse elements, heat-conducting special ceramic
Technical specifications
| Versions | URZ — cylindrical; URB — with screw terminals (NH000 DIN80); URM — with blade contacts (NH1, NH2); URS — square; URE — British standard |
|---|---|
| Categories | aR, gR, gRL, gS, gPV |
| Examples | URB 2055804: NH000, AC 660 V, 16–160 A, gR/aR; URM 2055604: NH1, DC 750 V, 32–160 A, gR |
| Materials | fine-grain silver fuse elements, heat-conducting special ceramic |
| Standards | IEC 60269-4, UL 248-13, VDE, CE |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
The fuse elements are made of fine-grain silver, and the design uses heat-conducting special ceramic. This gives stable characteristics throughout the service life, minimal I²t and low power losses. The fuse links have a high rated breaking capacity and withstand shocks and vibration. The cylindrical version is designated URZ. URB has screw terminals, for example the 2055804 series in the NH000 DIN80 size at AC 660 V, 16–160 A, categories gR and aR, with a GL-Ad indicator. URM is equipped with blade contacts, in particular 2055604 (NH1, DC 750 V, 32–160 A, gR, combined indicator) and 2055632 (NH1, DC 750 V, 200 A, aR). URS has a square body with various contacts, and URE is made to the British standard. The range complies with IEC 60269-4 and UL 248-13 for the US market, has IEC, UL, VDE and CE certifications, and the railway versions comply with IEC 60077-5.
How to choose
The category is chosen first. aR protects only against short circuits and has a very fast characteristic with very low I²t, so it is placed near sensitive devices. gR, gRL and gS also protect against overload, and gPV is intended for photovoltaic systems. Then the design and voltage are selected. For an AC 660 V circuit, URB in the NH000 size is suitable, and for DC 750 V direct current, URM in the NH1 size is suitable. If the fuse is needed in a battery system, look at the aBat / gBat range up to DC 2000 V and 260 kA, and for general protection of LV lines, NH fuse links.
Request a price and lead time
ULTRA rapid® (UR) — fast-acting fuses for semiconductor protection URZ / URB / URM / URS. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
How does category aR differ from gR in fast-acting fuses?
aR protects only against short circuits, has a very fast characteristic and very low I²t. gR covers the full range, that is, both overloads and short circuits.
Which UR version has screw terminals and which has blade contacts?
URB has screw terminals, for example 2055804 in the NH000 DIN80 size at AC 660 V, 16–160 A. URM has blade contacts in the NH1 and NH2 sizes, in particular 2055604 at DC 750 V, 32–160 A.
What standards and certifications do ULTRA rapid fuses have?
The range complies with IEC 60269-4 and UL 248-13 for the US market and has IEC, UL, VDE and CE certifications. The railway versions comply with IEC 60077-5.
Can UR fuses be used in inverters and UPS?
Yes, this range is intended for protecting power semiconductors in frequency converters, rectifiers, inverters, UPS and data centres. Category gPV is designed separately for photovoltaic systems.
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