ETC BHPR500500J

250W / 300W TO-227 HIGH POWER RESISTORS
Features………………………………………………………….
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Non-Inductive,
Rated up to 300W depending on resistor configuration.
Small TO-227 style package, with very low thermal resistance.
Superior vibration durability, with M4 screw terminals.
RoHS compliant.
Applications………………………………………………………
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High power snubber resistors in power supplies.
High frequency and pulse handling circuits.
Pulse generator load resistors.
High power crossover circuits in audio speaker systems
Specification
Dimensions
G
C
F
B
H
E
D
A
Dimensions
Symbols
A
B
C
D
E
F
G
H
(mm)
38+/-0.5
25+/-0.5
15+/-0.5
30+/-0.2
15+/-0.5
13+/-0.5
2-3.2dia.
4-M4.0
Schematics
BHPR300 BHPR250
Specifications subject to change without notice
1
BHPR
250W / 300W HIGH POWER RESISTORS
Specification Items
BPHR 250
BPHR300
250 Watts
1Ω to 1KΩ
Dual
E24
300 Watts
1Ω to 1KΩ
Single
E24
+/-100 ppm/°C
+/-100 ppm/°C
+/-5%(J)
+/-5%(J)
-55 - +120 °C
-55 - +120 °C
Power Rating
Resistance Range
Nominal Resistance Series
TCR
Tolerance
Operation Temp. Range
Test Conditions
At flange temperature -55 to +25°C
2.0 Ω and 5.0 Ω also available.
From -55 to +120 °C
Max. Applied Voltage
√(P.R)
Dielectric Withstanding
Voltage
Load Life
2500V
∆R+/-(1.0 %+0.05 Ω)
25°C, 90 min.ON, 30min.OFF, 1000hours.
Humidity
∆R +/-(1.0 %+0.05 Ω)
Temperature Cycle
∆R +/-(1.0 %+0.05 Ω)
Short Time Overload
∆R +/-(0.25 %+0.05 Ω)
70°C, 90 to 95%RH, DC0.1W, 1000hours.
-55°C, 30 min.,+155°C 30 min., 20 cycles.　55°C, 30 min.,+120C, 30 min., 20 cycles.
(Rated Power×2.5) for 2.5seconds with heat
sink.
Between terminals and flange.
Insulation Resistance
60 seconds.
Over 1000 MΩ
∆R +/-(0.25 %+0.05 Ω)
Vibration
Note: BHPR 250 has two resistors of equal values. (e.g. BHPR250 500 F, has two 50Ω resistors. See schematic). Current rating: 100A
Maximum.
Derating Curve, BHPR 250, BHPR 300
Temperature Rise, BHPR 300
Temp. Rise
(°C)
Power Rating％
160
140
120
100
80
60
40
20
100
80
60
+25°C
40
+120°C
20
0
-50
0
+50
+100
+150
Resistor temperature
Flange temperature
0
+200
Flange Temperature　（℃）
100
200
Applied Power (W)
300
Using 0.1°C/W heat sink
Materials
Flange: Ni plated copper plate. Substrate: alumina substrate. Resistor: Metal film resistor. Case: Polycarbonate
plastics. Terminals: Ni plated copper alloy to suit screw: 4-M4/10mm.
Ordering Information
BHPR
250
500
J
Model
Power Rating
250 : 250W
300 ; 300W
Resistance Code
500 : 50Ω (First two digits significant, last digit: number of trailing zeros)
2
Tolerance
J = 5% Tol