ULDCR12 Datasheet

ULDCR12
www.vishay.com
Vishay Draloric
Compact Metal Plate Power Resistor
FEATURES
• 760 kJ pulse load capability
• Typical temperature rise below 300 K for single
pulse at specified pulse current
• Extremely robust and compact design
• Material categorization:
for definitions of compliance please see
www.vishay.com/doc?99912
APPLICATIONS
• Industrial
• Alternative energy
• Load dump resistor in wind turbines
• Discharge resistor for bulk capacitors
The ULDCR12 belongs to Vishay’s Ultra Load Dump
Crowbar Resistor series. This ruggedized product family is
especially designed to absorb and withstand short pulses of
enormous loads and is therefore an excellent choice for
energy dumping applications in the fields of industry or
alternative energy.
TECHNICAL SPECIFICATIONS
DESCRIPTION
ULDCR12
Resistance
0.08 
Resistance tolerance
± 10 %
Temperature coefficient
+ 1030 ppm/K
Pulse energy Ep (1)(2)
760 kJ
Pulse current Ip (1)(2)
1260 A
Inductance
< 10 μH
Notes
(1) Rectangular pulse t = 6 s, recovery time between 2 pulses t > 45 min at operation in unforced convection at 40 °C ambient temperature.
i
r
(2) Short time overload t = 0.28 s, I = 6100 A, energy E = 840 kJ, temperature rise below 300 K.
i
p
p
APPLICATION INFORMATION
The impact of the pulse current Ip for the duration ti generates a typical temperature rise against the local ambient temperature
in the active material of the resistor. As long as the given pulse energy Ep is not exceeded, the temperature rise stays below
300 K. In case of natural convection at 40 °C ambient temperature the ULDCR12 needs more than 40 min to cool down back
to the ambient temperature level. Operation in forced convection shortens the advisable minimum cooling time until the next
pulse load.
The example of the short time overload proofs the tremendous robustness against current induced forces. The ULDCR12
withstands a pulse current Ip of 6100 A for 0.28 s. The related rise of the temperature do not exceed 300 K. The recovery time
prolongs compared to the specified standard conditions.
The resistors do not feature a limited lifetime when operated at the specified parameters. Overheating will not automatically
destroy the resistor. Repetitive or permanent exceedance of the load values may cause a change of the crystal structure, the
oxidation behavior and the temperature coefficient of the resistive material though.
Revision: 27-Mar-15
Document Number: 21040
1
For technical questions, contact: [email protected]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
ULDCR12
www.vishay.com
Vishay Draloric
PART NUMBER AND PRODUCT DESCRIPTION
Part Number: ULDCR12800FKA0LX00
U
L
D
C
R
1
2
8
0
0
F
K
A
0
L
X
0
0
TYPE
RESISTANCE
TOLERANCE
TCR
HOUSING
PACKAGING
CODE
SPECIAL
ULDCR12
3 digit value
1 digit
multiplier
K = ± 10 %
A=
+ 1030 ppm/K
0 = IP00
LX =
loose pack,
without
quantity
00 = Standard
2 digit code =
customized
version
MULTIPLIER
F = *10-4
Product Description: ULDCR12 R08 10 % +1030 IP00 LX
ULDCR12
R08
TYPE
10 %
RESISTANCE
+1030
TOLERANCE
TCR
IP00
LX
HOUSING
PACKAGING
CODE
Note
• The product can be ordered using either the PART NUMBER or the PRODUCT DESCRIPTION.
ELECTRICAL CONNECTION
Two M10 - bolt screws serve as electrical connections. Their
dimensions and positions are shown in the corresponding
drawing on the next page.
The cylindrical, 30 mm high insulators feature a M10 - thread
of 9 mm tap depth. The table below contains the relevant
electrical and mechanical parameters.
The positions of the standoff insulators are shown in the
technical drawing on the next page.
ASSEMBLY
The mounting positions of the resistor are horizontally
regular as well as horizontally or vertically hanging.
Therefore the ULDCR00 is equipped with six fiberglass
reinforced polyester polyglas mass standoff insulators.
PACKAGING
Each resistor is packed in a cardboard box. Single samples
are delivered as individual packets. Bigger lot sizes will
additionally be fixed on euro-pallets.
STANDOFF INSULATORS
HEIGHT
(mm)
DIAMETER
(mm)
WRENCH
SIZE
(mm)
THREAD
TAP DEPTH
(mm)
MAX. STUD
TORQUE
(Nm)
LEAKAGE
STRENGTH (1)
(kV)
BREAKDOWN
VOLTAGE (1)
(kV)
FIRE
BEHAVIOUR
30
30
30
M10
9
43
8
20
UL94-V0
Note
(1) The test of insulating materials were executed according the terms of VDE 0303-21 03/1999/DIN EN 60243-1 03/1999.
RELATED PRODUCTS
• For a comprehensive overview of all available ULDCR designs refer to the selector guide (www.vishay.com/doc?48002).
• For stainless steel power resistors, refer to the VSGR series (www.vishay.com/doc?21032).
Revision: 27-Mar-15
Document Number: 21040
2
For technical questions, contact: [email protected]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
ULDCR12
www.vishay.com
Vishay Draloric
DIMENSIONS
MODEL
L
(mm)
L1
(mm)
W
(mm)
W1
(mm)
W2
(mm)
H
(mm)
H1
(mm)
H2
(mm)
H3
(mm)
H4
(mm)
MASS
(kg)
ULDCR12
300 ± 2
270 ± 1.5
290 ± 2
260 ± 1.5
55 ± 0.5
80 ± 2
78 ± 1.5
55 ± 1.5
30 ± 0.5
20 ± 1
9.5 ± 0.5
Note
• The inscription 000A denotes the place of the serial number of the ULDCR12.
Revision: 27-Mar-15
Document Number: 21040
3
For technical questions, contact: [email protected]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
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www.vishay.com
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Revision: 02-Oct-12
1
Document Number: 91000