SILICON RECTIFIER
VOLTAGE RANGE 50 to 1000 Volts CURRENT 2.5 Amperes
RECTRON
SEMICONDUCTOR
TECHNICAL SPECIFICATION
FEATURES
* Low cost
* Low leakage
* Low forward voltage drop
* High current capability
MECHANICAL DATA
* Case: Molded plastic
* Epoxy: Device has UL flammability classification 94V-O
* Lead: MIL-STD-202E method 208C guaranteed
* Mounting position: Any
* Weight: 0.54 gram
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25
o
C ambient temperature unless otherwise specified.
Single phase, half wave, 60 Hz, resistive or inductive load.
For capacitive load, derate current by 20%.
RL251
THRU
RL257
R-3
MAXIMUM RATINGS (At T
A
= 25
o
C unless otherwise noted)
NOTES : Measured at 1 MH
Z
and applied reverse voltage of 4.0 volts
ELECTRICAL CHARACTERISTICS (At T
A
= 25
o
C unless otherwise noted)
Dimensions in inches and (millimeters)
2002-11
RATINGS
Maximum Recurrent Peak Reverse Voltage
Maximum RMS Voltage
Maximum DC Blocking Voltage
Maximum Average Forward Rectified Current
at T
A
= 75
o
C
Peak Forward Surge Current, 8.3 ms single half sine-wave
superimposed on rated load (JEDEC method)
Typical Junction Capacitance (Note)
Operating and Storage Temperature Range
SYMBOL
V
RRM
V
DC
I
O
I
FSM
C
J
T
J
, T
STG
V
RMS
Volts
Volts
Volts
Amps
2.5
150
35
-55 to + 150
Amps
pF
0
C
UNITS
Typical Thermal Resistance
R
J A
35
0
C / W
50
100
200
400
600
800
1000
70
35
140
280
420
700
560
50
200
400
600
800
1000
100
RL251
RL252
RL253
RL254
RL255
RL256
RL257
at Rated DC Blocking Voltage
CHARACTERISTICS
Maximum Full Load Reverse Current Average, Full Cycle
.375" (9.5mm) lead length at T
L
= 75
o
C
V
F
SYMBOL
I
R
UNITS
1.0
5.0
30
uAmps
uAmps
Maximum DC Reverse Current
Maximum Instantaneous Forward Voltage at 2.5A DC
Volts
@T
A
= 25
o
C
@T
A
= 100
o
C
RL251
RL252
RL253
RL254
RL255
RL256
RL257
50
1.0 (25.4)
MIN.
.138 (3.5)
.160 (4.1)
1.0 (25.4)
MIN.
.160 (4.1)
.138 (3.5)
DIA.
.042 (1.1)
.040 (1.0)
DIA.
RECTRON
RATING AND CHARACTERISTIC CURVES ( RL251 THRU RL257 )
FIG. 1 - TYPICAL FORWARD CURRENT
AVERAGE FORWARD CURRENT, (A)
AMBIENT TEMPERATURE, ( )
DERATING CURVE
2.5
2.0
1.5
1.0
.5
0
0
25
50
75
100
125 150 175
Single Phase Half Wave
60Hz Inductive or
Resistive Load
FIG. 3 - MAXIMUM NON-REPETITIVE FORWARD
PEAK FORWARD SURGE
NUMBER OF CYCLES AT 60Hz
SURGE CURRENT
1
2
4
6 810
20
40 6080100
150
120
90
60
30
5
8.3ms Single Half Sine-Wave
(JEDED Method)
CURRENT, (A)
FIG. 2 - TYPICAL INSTANTANEOUS FORWARD
CHARACTERISTICS
INSTANTANEOUS FORWARD
INSTANTANEOUS FORWARD VOLTAGE, (V)
TJ = 25
Pulse Width=300uS
1% Duty Cycle
CURRENT, (A)
.6
.8
1.0
1.2
1.4
1.5
20
10
4
2
1.0
.4
.2
.1
.04
.02
.01
JUNCTION CAPACITANCE,
(pF
)
FIG. 5 - TYPICAL JUNCTION CAPACITANCE
REVERSE VOLTAGE, ( V )
200
100
60
40
20
10
6
4
2
1
.1
.2
.4
1.0
2
4
10
20 40 100
TJ = 25
TJ = 100
TJ = 25
FIG. 4 - TYPICAL REVERSE CHARACTERISTICS
INSTANTANEOUS REVERSE CURRENT, (uA)
PERCENT OF RATED PEAK REVERSE VOLTAGE, (%)
0
20
40
60
80
100
120
140
.01
.04
.1
.4
10
1.0
4
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