Precharge resistors
As a leading technology company, KRAH develops and manufactures customised wire-wound high-performance resistors for hybrid (HEV), plug-in hybrid (PHEV), range extender (REEV) and full battery electric vehicles (BEV) as well as electrical trucks, buses and energy storage systems. The main areas of application in new energy vehicles (NEV) include high-voltage auxiliary heaters, the pre- or discharge of the DC-link capacity in the battery management system, current-limited charging of capacities and the discharge of inverters. For high voltage systems up to 1000V or higher, as well as for recuperation and safety-relevant functions in electric vehicles, you will find your solution within the KRAH group of companies.
We have already compiled a selection of suitable products for you below. Click here to see the entire product range.
Applications
Industry
E-Mobility
Automotive
Product Groups
Power Resistors
Electronic Controllers
HPRS T
High power resistors in aluminum casing
HPRS T - High power resistors in aluminum casing from KRAH. Here you can find the technical data & application areas.
technical datatechnical data
Automotive-grade design - High pulse load capacity - Compact and flat design - Customized solutions available - Flexibility in mounting position - High flexibility during the development phase - Various sizes available depending on technical requirements
#Discharge-resistor #Precharge-resistor #E-Mobility #Active-Discharge-Resistor #Battery-Management #On-Board-Charger #Passive-Discharge-Resistor #Precharge-Resistor #Aluminium-housing #Air-cooled
HPRS TS
High power resistors in aluminum casing
HPRS TS - High power resistors in aluminum casing from KRAH. Here you can find the technical data & application areas.
#Discharge-resistor #Customized-solutions #Precharge-resistor #E-Mobility #Active-Discharge-Resistor #Battery-Management #On-Board-Charger #Passive-Discharge-Resistor #Precharge-Resistor #Aluminium-housing #Air-cooled
KRGG
Wire wound resistors in ceramic casing
KRGG High power resistors, wire wound in ceramic casing made by KRAH. Here you can find the technical data & application areas.
technical datadimensions (LxWxH)
20 x 11 x 7 … 35 x 16 x 13 mm
tolerance min ±
5 %
tolerance max ±
10 %
rated power min
2 W
rated power max
100 W
resistance range min
0,2 Ω
resistance range max
8000 Ω
#Load-resistor #Brake-resistor #Filter-resistor #Charge-and-discharge-resistor #Balancing-resistor #Precharge-resistor #Industry #Automation-technology #Power-Electronics #Ceramic-casing #Air-cooled
SFD
Wire wound resistors
SFD wire wound resistors with axial wire terminal, silicon cemented made by KRAH. Here you can find the technical data & application areas.
technical datadimensions (LxWxH)
16 x 5 x 5 … 35 x 5 x 5 mm
tolerance min ±
5 %
tolerance max ±
10 %
rated power min
1 W
rated power max
3 W
resistance range min
0,051 Ω
dimensions (LxWxH)
33000 mm
#Current-limiting-resistor #Load-resistor #Brake-resistor #Filter-resistor #Heating-resistor #Charge-and-discharge-resistor #Control-resistor #Precharge-resistor #Industry #Automation-technology #Power-Electronics #Fiber-glass-carrier #Air-cooled
ZDFL
Cement-coated wire wound resistors
ZDFL Cemented wire wound resistors with two or more lugs made by KRAH. Here you can find the technical data & scope of application.
technical datadimensions (LxWxH)
45 x 9 x 9 … 120 x 21 x 21 mm
tolerance min ±
5 %
tolerance max ±
10 %
rated power min
6 W
rated power max
65 W
resistance range min
0,39 Ω
resistance range max
160000 Ω
#Current-limiting-resistor #Load-resistor #Brake-resistor #Filter-resistor #Discharge-resistor #Heating-resistor #Charge-and-discharge-resistor #Control-resistor #Precharge-resistor #Ballast-resistor #E-Mobility #Battery-Management #On-Board-Charger #Industry #Automation-technology #Equipment-and-plant-construction #Ceramic-carrier-cement-coated #Air-cooled
ZDST
Cement-coated wire wound resistors
technical datadimensions (LxWxH)
45 x 9 x 9 … 120 x 21 x 21 mm
#Current-limiting-resistor #Load-resistor #Brake-resistor #Filter-resistor #Speed-control #Discharge-resistor #Heating-resistor #Charge-and-discharge-resistor #Control-resistor #Precharge-resistor #Ballast-resistor #E-Mobility #Battery-Management #On-Board-Charger #Industry #Automation-technology #Equipment-and-plant-construction #Ceramic-carrier-cement-coated #Air-cooled
ZDST
Cement-coated wire wound resistors
technical datadimensions (LxWxH)
45 x 9 x 9 … 120 x 21 x 21 mm
#Current-limiting-resistor #Load-resistor #Brake-resistor #Filter-resistor #Speed-control #Discharge-resistor #Heating-resistor #Charge-and-discharge-resistor #Control-resistor #Precharge-resistor #Ballast-resistor #E-Mobility #Battery-Management #On-Board-Charger #Industry #Automation-technology #Equipment-and-plant-construction #Ceramic-carrier-cement-coated #Air-cooled
ZDST
Cement-coated wire wound resistors
technical datadimensions (LxWxH)
45 x 9 x 9 … 120 x 21 x 21 mm
#Current-limiting-resistor #Load-resistor #Brake-resistor #Filter-resistor #Speed-control #Discharge-resistor #Heating-resistor #Charge-and-discharge-resistor #Control-resistor #Precharge-resistor #Ballast-resistor #E-Mobility #Battery-Management #On-Board-Charger #Industry #Automation-technology #Equipment-and-plant-construction #Ceramic-carrier-cement-coated #Air-cooled
HPRD
For current-limited charging of the capacities or discharging of the inverters, e.g. as pre-charging or discharging resistor.
#Discharge-resistor #Precharge-resistor #E-Mobility #Active-Discharge-Resistor #Battery-Management #On-Board-Charger #Passive-Discharge-Resistor
BR
Cemented Wire Resistors
Cemented wire resistors with axial wire terminals and caps. Here you will find the technical specifications and applications.
technical datadimensions (LxWxH)
mm
resistance range min
0,15 Ω
tolerance min ±
1 %
tolerance max ±
10 %
resistance range max
110000 Ω
rated power min
3 W
rated power max
18 W
#Load-resistor #Brake-resistor #Filter-resistor #Heating-resistor #Charge-and-discharge-resistor #Control-resistor #Precharge-resistor #E-Mobility #Battery-Management #Industry #Automation-technology #Power-Engineering #Power-Electronics #Transport-and-Logistics #Ceramic-carrier-cement-coated #Air-cooled
KRBR PCB SMD
Safe pre-charging for high-voltage applications
With resistance values ranging from 0.2 Ω to 34 kΩ, power ratings from 1 W to 150 W and voltage ranges from 350 to 1000 V, the KRBR DCR SMD enables reliable and controlled pre-charging of capacitors, battery systems and DC intermediate circuits. As a charging resistor, it limits high inrush currents, protects power electronics and energy storage systems from load spikes, and is particularly suitable for high-voltage applications in industry, power electronics, energy storage and e-mobility.
technical dataresistance range min
0,2 Ω
rated power min
1 W
tolerance max ±
10 %
Voltage max
1000 V
rated power max
150 W
resistance range max
34.000 Ω
Voltage min
350 V
tolerance min ±
5 %
#Precharge-resistor #E-Mobility #Precharge-Resistor
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