WDBR1-47RKT Welwyn Components, WDBR1-47RKT Datasheet

RESISTORS, POWER PLANAR, 47R 1.5KW RESISTORS, POWER PLANAR, 47R 1.5KW

WDBR1-47RKT

Manufacturer Part Number
WDBR1-47RKT
Description
RESISTORS, POWER PLANAR, 47R 1.5KW RESISTORS, POWER PLANAR, 47R 1.5KW
Manufacturer
Welwyn Components
Series
WDBRr
Datasheet

Specifications of WDBR1-47RKT

Thick Film
RESISTANCE
Case Style
PLANAR
Power Rating
180W
Tolerance, +
10%
Tolerance, -
10%
Voltage Rating, Dc
2500V
Rohs Compliant
YES
Ultra Low Profile
Power Resistors
WDBR Series
Electrical Data
Notes:
Physical Data
Construction
A high integrity dielectric layer is applied to a machined
stainless steel substrate. Thick-film conductor and resistor
patterns are printed and fired, then protected with a high
temperature overglaze. The termination pads are tinned with
Pb-free solder and optional terminals or leads are soldered on.
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own test data and is considered accurate at time of print.
Welwyn Electronics Park, Bedlington, Northumberland, NE22 7AA, England. Tel: 01670 822181 Fax: 01670 829465 Web: www.welwyn-tt.com
WDBR1/2
WDBR1
WDBR2
WDBR3
WDBR5
WDBR7
Resistance range
Resistance tolerance
Pulse power rating
Power rating on heatsink
Power rating on fan-cooled heatsink
TCR
Maximum element temperature
Dielectric withstand
Inductance (typical)
Dimensions in mm, weight without terminations in g
Welwyn Components Limited
Ultra low profile thick-film on steel
500W to 7kW peak power
Single fixing heatsink mountable
Ideal for dynamic braking, inrush limit and snubber circuits
Choice of flying lead, push-on or solder terminations
Low inductance design
High isolation, even after failsafe overload fusing
RoHS compliant, non-flammable construction
1.
2.
3.
4.
For details of pulse condition see Fig. 1 in Performance Data.
Mounted on a 0.53°C/W heatsink with no forced air cooling, air temperature 25°C.
Mounted on a 0.53°C/W heatsink with 5m/s forced air cooling, air temperature 25°C.
Limited by the solder type; the rating can be improved for non-standard parts by using HMP solder.
101.6
152.4 101.6
L
31.9
49.3
122
61
±0.1
W
1
28.1
35.9
40.6
70
70
±0.1
2
t
V (dc/ac peak)
0.9
1.5
±0.1
ØD nom a nom b nom c nom Wt. nom
ppm/°C
2.2
3.2
5.3
ohms
3
kW
μH
°C
W
%
W
13.5
14.0
15.0
7.5
3.2
4.7
22, 47, 100
WDBR1/2
160
300
0.5
11.2
13.0
22.0
23.8
51.3
3.1
WDBR1
10.2
4.3
6.2
5.8
7.4
9.2
<3
180
700
1.5
181.8
12.6
17.1
50.8
60.7
6.5
12, 22, 47, 100, 150
WDBR2
200
780
2.0
+500 to +600
2500
365
W
10
WDBR3
Substrate thickness = t
Fixing hole is located centrally
260
900
3.5
<4
WDBR5
1000
270
5.0
D
L
<5
47, 100, 150
WDBR7
1490
280
c
7.0
<6
4
4
a
b

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WDBR1-47RKT Summary of contents

Page 1

... Welwyn Components reserves the right to make changes in product specification without notice or liability. All information is subject to Welwyn’s own test data and is considered accurate at time of print. Welwyn Components Limited Welwyn Electronics Park, Bedlington, Northumberland, NE22 7AA, England. Tel: 01670 822181 Fax: 01670 829465 Web: www.welwyn-tt.com WDBR1/2 WDBR1 ohms 22, 47, 100 % kW ...

Page 2

... The resistor should be mounted using a screw head bolt of size M5 for WDBR2 & for WDBR1 and M2 for WDBR1/2. This should be torqued to 2.5Nm ±10%. WDBR resistors will fail safe (open circuit) under overload fault conditions and still maintain a 1kV dielectric withstand. ...

Page 3

... Welwyn Electronics Park, Bedlington, Northumberland, NE22 7AA, England. Tel: 01670 822181 Fax: 01670 829465 Web: Single Overload Energy Capacity 100 10 WDBR7 1 WDBR5 WDBR3 WDBR2 0.1 WDBR1 WDBR1/2 0.01 10 100 0. – Standard WDBR5 WDBR7 WDBR3 WDBR2 WDBR1 WDBR1/2 0 100 Duration of Overload (s) 10/08 www.welwyn-tt.com ...

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