1N4678 SERIES
AXIAL LEAD ZENER DIODES
VOLTAGE
FEATURES
• Planar Die construction
• 500mW Power Dissipation
• Ideally Suited for Automated Assembly Processes
• Lead free in comply with EU RoHS 2002/95/EC directives
1.8 to 43 Volts
POWER
500mWatts
MECHANICAL DATA
• Case: Molded Glass DO-35
• Terminals: Solderable per MIL-STD-750, Method 2026
• Polarity: See Diagram Below
• Approx. Weight: 0.13 grams
• Mounting Position: Any
• Ordering information: Suffix : “ -35 ” to order DO-35 Package
• Packing information
B
- 2K per Bulk box
T/R - 10K per 15" plastic Reel
T/B - 5K per horiz. tape & Ammo box
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS (T
A
=25
o
C unless otherwise noted)
Rating
Power Dissipation at T
A
= 25
O
C
Maximum Forward Voltage at I
F
=100mA
Maximum Thermal Resistance Junction to Ambient Air (Notes 1)
Operating Junction Temperature Range
Storage Temperature Range
Symbol
P
TOT
V
F
R
θJA
T
J
T
STG
Value
500
1
300
-55 to +175
-55 to +175
Units
mW
V
O
C/W
O
C
C
O
NOTES :
1. Valid provided that leads at a distance of 10mm from case are kept at ambient temperature.
February 23,2011-REV.00
PAGE . 1
1N4678 SERIES
P
D
, Power Dissipation (W)
0.6
1000
0.5
0.4
0.3
0.2
0.1
0
0
25
50
75
100
125
150
175
I
F
, Forward Current
(mA)
T
J
= 125°C
100
T
J
= 175°C
T
J
= 25°C
10
T
J
= 75°C
1
0.2
0.4
0.6
0.8
1
1.2
T
L
, Lead Temperature (°C)
V
F
, Forward Voltage (V)
Fig.1 Power Derating Curve
Fig.2 Typical Forward Characteristics
2.0V
4.3V
3.6V
3.3V
3.0V
6.2V
5.6V
4.7V
10V
11V
22V
60
I
R
,Leakage Current (μA)
50
40
30
20
10
T
J
= 25°C
0
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
V
R
, Reverse Voltage (V)
Fig.3 Typical Reverse Characteristics
6.2V
5.6V
4.7V
4.3V
3.6V
3.3V
3.0V
10V
11V
22V
30
2.0V
I
Z
, Leakage Current (mA)
25
20
15
10
5
0
0
1
2
3
T
J
= 25°C
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
V
Z
,
Zener
Voltage (V)
Fig.4 Typical Zener Characteristics
February 23,2011-REV.00
PAGE . 3
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