HIGH EFFICIENCY RECTIFIER
HER251 THRU HER258
VOLTAGE RANGE CURRENT
50 to 1000 Volts 2.5Ampere
FEATURES
• Low coat construction • Fast switching for high efficency. • Low reverse leakage • High forward surge current capability • High temperature soldering guaranteed:
260℃/10 secods/.375”(9.5mm)lead length at 5 lbs(2.3kg) tension
MECHANICAL DATA
• Case: Transfer molded plastic • Epoxy: UL94V-O rate flame retardant • Polarity: Color band denotes cathode end • Lead: Plated axial lead, solderable per MIL-STD-202E method 208C • Mounting position: Any • Weight: 0.020ounce, 0.56 grams
1.0(25.4) MIN.
.160(4.1) .138(3.5)
1.0(25.4) MIN.
.042(1.1) .038(0.96)
DIA.
R-3
.160(4.1) DIA. .138(3.5)
Dimensions in inches and (millimeters)
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
• Ratings at 25OC ambient temperature unless otherwise specified • Single Phase, half wave, 60Hz, resistive or inductive load • For capacitive load derate current by 20%
HER HER HER HER SYMBOLS 251 252 253 254
HER 255
Maximum Repetitive Peak Reverse Voltage
VRRM
50 100 200 300 400
Maximum RMS Voltage
VRMS 35 70 140 210 280
Maximum DC Blocking Voltage
Maximum Average Forward Rectified Current 0.375”(9.5mm) lead length at TA= 50℃
Peak Forward Surge Current 8.3mS single half sine wave superimposed on rated load (JEDEC method)
VDC 50 100 200 300 400
I(AV)
2.5
IFSM 100
Maximum Instantaneous Forward Voltage @ 2.5A
VF
1.0
1.3
Maximum DC Reverse Current at Rated DC Blocking Voltage
TA = 25℃ TA = 125℃
IR
5.0 250
Maximum Full Load Recovery Current,full cycle average 0.375”(9.5mm)lead length at TL=55℃
IR(AV)
100
Maximum Reverse Recovery Time Test conditions IF=0.5A,IR=1.0A,IRR=0.25A
trr
50
Typical Thermal Resistance (NOTE 2) Typical Thermal Resistance(NOTE 1)
CJ RθJA
30 35
Operating Junction Temperature Range
TJ
(-55 to +150)
Storage Temperature Range
TSTG
(-55 to +150)
Notes: 1 Thermal resistance from junction to ambient with .375”(9.5mm)lead length, PCB. mounted. .
2. Measured at 1.0 MHz and applied reverse of 4.0 V
HER 256 600 420 600
1.5
HER 257 800 560 800
HER 258 1000 700 1000
UNITS
Volts Volts Volts
Amp
Amps 1.7 Volts
µA
µA
75 ns 35 PF
℃/W
℃ ℃
E-mail:
[email protected] Web Site: www.cnmic.com
HIGH EFFICIENCY RECTIFIER
HER251 THRU HER258
VOLTAGE RANGE CURRENT
50 to 1000 Volts 2.5Ampere
RATING AND CHRACTERISTIC CURVES HER251 THRU HER258
AVERAGE FORWARD CURRENT, (A)
FIG.1-TYPICAL FORWARD CURRENT
DERATING CURVE
3.0
2.0
1.0
0 0
Single Phase Half Wave 60Hz Resistive or
Inductive Load
0.375"(9.5mm)Lead Length
25
50
75
100 125
150
AMBIENT TEMPERATURE, (° C)
175
PEAK FORWARD SURGE CURRENT, (A)
FIG.2-MAXIMUM NON-REPETITIVE PEAK FORWARD SURGE CURRENT
150
8.3ms Single Half Sine-Wave (JEDEC Method) Tj=Tjmax 100
50
1 Cycle
01
2
4 6 8 10
20
40 60
NUMBER OF CYCLES AT 60 Hz
100
INSTANTANEOUS FORWARD CURRENT, (A)
50/ 100/ 200V 300/ 400V
600 V 800V 1000V
FIG.3-TYPICAL INSTANTANEOUS FORWARD CHARACTERISTICS
100
10
1.0
Tj =25° C Pulse Width=300us
1% Duty Cycle 0.01
0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8
INSTANTANEOUS FORWARD VOLTAGE,(V)
FIG.5-TYPICAL JUNCTION CAPACITANCE
100 HER251-HER255
HER256-HER258 10
TJ=25° C F=1MHz Vsig =5 0m Vp-p
1 0.1 1.0 10
REVERSE VOLTAGE,(V)
100
INSTANTANEOUS REVERSE CURRENT, (UA)
FIG.4-TYPICAL REVERSE CHARACTERISTICS
100
10
1.0
0.1 0
Tj =125° C
Tj =25° C
20 40 60 80 100 120
PERCENT OF RATED PEAK REVERSE VOLTAGE,(%)
140
FIG.6-TEST CIRCUIT DIAGRAM AND REVERSE REXOVERY TIME CHARACTERISTIC
50Ω NONINDUCTIVE
10Ω NONINDUCTIVE
(+)
25 Vdc (approx)
(-)
D.U.T
1Ω NON INDUCTIVE
(-)
PULSE GENERATIOR
(NOTE 2)
OSCILLOSCOPE (NOTE 1)
+0.5A 0
0.25A
-1.0A
NOTE: 1.Rise Time =7ns max.Input Impedance=1megohm.22pF 2.Rise time=10ns max.Source Impedance=50 ohms
Trr
1cm
SET TIME BASE FOR 50 /100NS /cm
JUNCTION CAPACITANCE,(pF)
E-mail:
[email protected] Web Site: www.cnmic.com
.