FEATURES
● Low cost
● Diffused junction
● Ultra fast switching for high efficiency
● Low reverse leakage current
● Low forward voltage drop
● High current capability
● The plastic material carries UL recognition 94V-0
MECHANICAL DATA
●Case: JEDEC DO-27 molded plastic
●Polarity: Color band denotes cathode
●Weight: 0.04ounces , 1.1grams
●Mounting position: Any
Dimensions in inches and (millimeters)
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Rating at 25℃ 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
HER
HER
HER
HER
301G
302G
303G
304G
305G
306G
307G
308G
Maximum Recurrent Peak Reverse Voltage VRRM 50 100 200 300 400 600 800 1000 V
Maximum RMS Voltage VRMS 35 70 140 210 280 420 560 700 V
Maximum DC Blocking Voltage VDC 50 100 200 300 400 600 800 1000 V
Maximum Average Forward
Rectified Current @TA =55 ℃
Peak Forward Surage Current
8.3ms Single Half Sine-Wave
Super Imposed on Rated Load(JEDEC Method)
Peak Forward Voltage at 3.0A DC(Note1) VF1.3 V
Maximum DC Reverse Current @TJ=25℃
at Rated DC Blocking Voltage @TJ=100℃
Maximum Reverse Recovery Time(Note 1) TRR nS
Typical Junction Capacitance (Note2) CJpF
Typical Thermal Resistance (Note3) RθJA ℃/W
Operating Temperature Range TJ℃
Storage Temperature Range TSTG ℃
HER301G thru HER308G
~ 109 ~
2.Measured at 1.0 MHz and applied reverse voltage of 4.0V DC
3.Thermal resistance junction to ambient
NOTES: 1.Measured with IF=0.5A，IR=1A ，IRR=0.25A
5.0
20
-50 to +150
UNIT
3.0
100
IR
I(AV)
GLASS HIGH EFFICIENCY RECTIFIERS REVERSE VOLTAGE - 50 to 1000 Volts
FORWARD CURRENT - 3.0 Amperes
uA
A
150
1.0
-50 to +150
50 75
50 30
IFSM A
1.7
CHARACTERISTICS SYMBOL
DO- 27
DIA.
DIA
210
.375(9.5)
.335(8.5)
.052(1.3)
.048(1.2)
.220(5.6)
.197(5.0)
1.0(25.4)
1.0(25.4)
MI
MI
RATING AND CHARACTERTIC CURVES
HER301G thru HER308G
~ 110 ~
FIG. 1 – FORWARD CURRENT DERATING CURVE
AMBIENT TEMPERATURE (℃)
AVERAGE FORWARD CURRENT
AMPERES
1.0
025
2.0
3.0
50 75 100 125 150 175
0.5
1.5
2.5 SINGLE PHASE HALF WAVE 60Hz
RESISTIVE OR INDUCTIVE LOAD
FIG. 2 – MAXIMUM NON-REPETITIVE SURGE CURRENT
NUMBER OF CYCLES AT 60Hz
PEAK FORWARD SURGE CURRENT
(AMPERES
）
SINGLE HALF-SINE-WAVE
(JEDEC METHOD)
200
150
100
50
0100
5020101 2 5
FIG.3 – TYPICAL JUNCTION CAPACITANCE
CAPACITANCE (pF)
REVERSE VOLTAGE (VOLTS)
1000
100
1
10
100
10
11.0
Tj = 25°C f = 1 MHz
HER301G -HER305G
HER306G - HER308G
FIG.4-TYPICAL FORWARD CHARACTERISTICS
INSTANTANEOUS FORWARD CURRENT
(AMPERES)
INSTANTANEOUS FORWARD VOLTAGE (VOLTS)
TJ = 25°C
PULSE WIDTH 300us
HER306G - HER308G
HER301G - HER304G
1.0
10
0.1
100
0 0.2 0.4 0.6 0.8 1.2 1.61.4
1.0 1.8