BITECH BPR

3W to 50W PLANAR SHOCK / VIBRATION PROOF
HIGH POWER RESISTORS
Features…………………………………………………………
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Applications………………………………………………
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Non-Inductive planar package
High power density.
Thin package for high density PCB installation.
Power dissipated above the board.
RoHS compliant.
Superior vibration durability
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Ideal for extreme mechanically stressed environments.
Power supply pre-load resistors.
UPS systems
Snubber and pulse handling circuits.
Pulse generator load resistors.
In-rush current protection
Bleeder Resistors
Specification
Model
Dimensions (inch / mm)
Dim A
Dim B
.040±.005
1.02±0.13
Dim. A ±.005
±0.13
Dim. B ±.005
±0.13
Dim C
Dim D
BPR
Dim. C ±.020
±0.51
.200±.020
5.08±0.51
.020±.005
0.51±0.13
Dim. D ±.015
±0.38
BPR 3
0.50
12.70
0.60
15.24
0.67
17.02
0.30
7.62
BPR 5
0.50
12.70
1.00
25.40
1.07
27.18
0.30
7.62
BPR 7
1.00
25.40
0.75
19.05
0.82
20.82
0.80
20.32
BPR 10 BPR 20 BPR 30
1.00
2.00
2.10
25.40
50.80
53.34
1.00
1.00
1.40
25.40
25.40
35.56
1.07
1.07
1.47
27.18
27.18
37.34
0.80
1.80
1.90
20.32
45.72
48.26
BPR 40 BPR 50
2.10
2.10
53.34
53.34
1.90
2.20
48.26
55.88
1.97
2.27
50.04
57.66
1.90
1.90
48.26
48.26
Materials
Lead:
Tin Plated Phosphor Bronze
Substrate: 96% Alumina
Resistor: Ruthenium Oxide
.040±.005
1.02±0.13
.200±.002
5.08±0.05
Notes:
1. Contact factory for custom products, non-standard values and tolerances.
Items
Power Rating
Operating Voltage Max
Resistance Range
TCR
Tolerance
3W, 5W, 7W, 10W, 20W, 30W, 40W & 50W,
Conditions
@ ambient temp < 70°C
300Vac, 500VDC
0.1Ω to 200 KΩ
100 ppm/°C
+/-5%, optional 1%, 2%
Extended resistance range available.
For -55 to +155°C and above 1Ω
Operation Temp. Range
-55 - +155 °C
Dielectric Withstanding Voltage
5KV minimum
Mechanical Shock
∆R +/- 0.25 %
100G.
Load Life
∆R +/- 2.0 %
70°C, 90 min. ON, 30 min.OFF, 1000 hours.
Humidity
∆R +/- 0.5 %
85°C, 85% RH, DC 0.1W, 1000 hours.
Temperature Cycle
∆R +/- 0.5%
-55°C, 30 min.,+155°C 30min., 5cycles.
Soldering Heat (Max)
Solderability
1
Specification
∆R +/- 0.25 %
250+/-5°C, 10 seconds,
Min 95% coverage
230+/-5°C, 5 seconds.
Insulation Resistance
Over 1000 MΩ
Between terminals and metal back plate.
Vibration
∆R +/- 0.25 %
20G, 10Hz to 2 KHz.
Specifications subject to change without notice
BPR 3W to 50W PLANAR HIGH POWER RESISTORS
Derating Curve
% Power Rating
100
80
60　40
20
0
70°C
+155°C
Resistor Temperature (°C)
Ordering Information
BPR
10
500
F
Model
Power Rating Code
3 : 3W,
5 : 5W
7 : 7W
10 : 10W
20 : 20W
30 : 30W
40 : 40W
50 : 50W
Resistance Code
50 Ω : 500 First two digits significant, last digit: number of trailing zeros
2
Tolerance
J = 5% Tol
G = 2% Tol
F = 1% Tol