TVS Diodes
Axial > 1500W > 1N5908
1N5908
Description
Pb
These devices are designed to protect voltage sensitive
components from high voltage, high-energy transients.
They have excellent clamping capability, high surge
capability, low zener impedance and fast response time.
These devices are the Littelfuse exclusive, cost effective,
highly reliable axial leaded package and are ideally suited
for use in communication systems, numerical controls,
process controls, medical equipment, business machines,
power supplies and many other industrial/consumer
applications, to protect CMOS, MOS and Bipolar
integrated circuits.
Features
•
•
•
•
•
•
Working Peak Reverse Voltage Range - 5.0 V
Peak Power - 1500 Watts @ 1 ms
Maximum Clamp Voltage @ Peak Pulse Current
Low Leakage < 5 µA Above 10 V
Response Time is Typically < 1 ns
Bi-directional
These are Pb-Free Devices*
Maximum Ratings and Thermal Characteristics
Rating
Peak Power Dissipation (Note 1) @
T
L
” 25°C
Symbol
P
PK
Value
1500
Unit
W
Steady State Power Dissipation
@ T
L
“75°C, Lead Length = 3/8 ≤
Derated above T
L
= 75°C
Thermal Resistance,
Junction-to-Lead
5.0
P
PK
50
W
mW/°C
Functional Diagram
Cathode
R
8JL
20
°C/W
Anode
Forward Surge Current (Note 2)
@TA = 25°C
I
FSM
200
A
Additional Information
Uni-directional
Operating and Storage
Temperature Range
T
J
, T
stg
−65 to
+175
°C/W
Datasheet
Resources
Samples
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are
stress ratings only. Functional operation above the Recommended Operating Conditions is
not implied. Extended exposure to stresses above the Recommended Operating Conditions
may affect device reliability.
1. Nonrepetitive current pulse per Figure 4 and derated above TA = 25
°
C per Figure 2.
2. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, duty cycle = 4 pulses per
minute maximum.
*Bidirectional device will not be available in this device
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
TVS Diodes
Axial > 1500W > 1N5908
I-V Curve Characteristics
(T
A
= 25°C unless otherwise noted, V
F
= 3.5 V Max. @ I
F
(Note 3) = 100 A)
I
I
Symbol
I
PP
V
C
V
RWM
Parameter
Maximum Reverse Peak Pulse Current
Clamping Voltage @ I
PP
Working Peak Reverse Voltage
Maximum Reverse Leakage Current @ V
RWM
Breakdown Voltage @ I
T
Test Current
Forward Current
Forward Voltage @ I
F
I
I
V
I
R
V
BR
I
T
I
F
I
V
F
Ratings and Characteristic Curves
Figure 1. Pulse Rating Curve
100
Figure 2. Pulse Derating Curve
PEAK PULSE DERATING IN % OF
PEAK POWER OR CURRENT @ TA= 25° C
PPK, PEAK POWER (kW)
NONREPETITIVE
PULSE WAVEFORM
SHOWN IN FIGURE 5
100
80
60
40
20
0
02
55
07
51
00 1251 50 175 200
T
A
, AMBIENT TEMPERATURE °C)
(
10
1
s
s
t , PULSE WIDTH
1 ms
10 ms
Figure 3. Steady State Power Derating
PD , STEADY STATE POWER DISSIPATION (WATTS)
Figure 4. Pulse Waveform
t
r
≤
3/8
5
4
3
2
1
0
3/8
s
"
VALUE (%)
100
PEAK VALUE - I
PP
PULSE WIDTH (t ) IS DEFINED
P
AS THAT POINT WHERE THE
PEAK CURRENT DECAYS TO 50%
OF I
PP
.
"
HALF VALUE -
50
t
P
0
01
23
I
PP
2
0
25
50
75
1001 25 1501 75
T
L
, LEAD TEMPERATURE (°C)
200
4
t, TIME (ms)
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
TVS Diodes
Axial > 1500W > 1N5908
Figure 5. Typical Derating Factor for Duty Cycle
1
0.7
0.5
0.3
DERATING FACTOR
0.2
0.1
0.07
0.05
0.03
0.02
0.01
0.10
10 s
.2
0.52
1
51
05
D, DUTY CYCLE (%)
20
00
10
PULSE WIDTH
10 ms
Typical Protection Circuit
Z
in
V
in
1 ms
100 s
LOAD
V
L
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
TVS Diodes
Axial > 1500W > 1N5908
Electrical Characteristics
(TA = 25 ° C unless otherwise noted, VF = 3.5 V Max. @ IF (Note 3) = 53 A)
Device
(Notes 4)
V
RWM
(Note 5)
Breakdown Voltage
I @V
R
RWM
V
C
(Volts) (Note 7)
@I
T
@ I
PP
=
120 A
8.5
V
BR
(V)
(Note 6)
Min
6.0
Nom
-
Max
-
(Volts)
1N5908
5.0
(µA)
300
(mA)
1.0
@ I
PP
= 60 A @ I
PP
= 30 A
8.0
7
.6
3. Square waveform, PW = 8.3 ms, Non-repetitive duty cycle.
4. 1N5908 is JEDEC registered as a unidirectional device only (no bidirectional option)
5. A transient suppressor is normally selected according to the maximum working peak reverse voltage (V
RWM
), which should be equal to or greater than
the dc or continuous peak operating voltage level.
6. VBR measured at pulse test current I
T
at an ambient temperature of 25°C and minimum voltages in V
BR
are to be controlled.
7 Surge current waveform per Figure 4 and derate per Figure 2 of the General Data - 1500 W at the beginning of this group
.
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
TVS Diodes
Axial > 1500W > 1N5908
Dimensions
ORDERING INFORMATION
Device
B
D
1N5908G
1N5908RL4G
Package
Axial Lead
(Pb-Free)
Axial Lead
(Pb-Free)
Shipping†
500 Units/Box
1500/Tape & Reel
l
P
P
K
Flow/Wave Soldering (Solder Dipping)
Peak Temperature :
260
º
C
1/16” from the case for 10
seconds
A
Dipping Time :
K
Physical Specifications
Case
Void-free, transfer-molded, thermosetting
plastic
Modified L−Bend providing more contact
area to bond pads
All external surfaces are corrosion
resistant and leads are readily solderable
Any
Dim
A
B
D
Inches
Min
0.335
0.189
0.038
1.000
---
Max
0.374
0.209
0.042
---
0.050
Millimeters
Min
8.50
4.80
0.96
25.40
---
Max
9.50
5.30
1.06
---
1.27
Leads
Finish
K
P
NOTES:
Mounting Position
1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. LEAD FINISH AND DIAMETER UNCONTROLLED IN DIMENSION P
.
4. 041A-01 THRU 041A-03 OBSOLETE, NEW STANDARD 041A-04.
Part Marking System
Disclaimer Notice
-
Information furnished is believed to be accurate and
reliable. However, users should independently evaluate the suitability of
and test each product selected for their own applications. Littelfuse products
are not designed for, and may not be used in, all applications. Read complete
Disclaimer Notice at:
www.littelfuse.com/disclaimer-electronics.
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
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