
Unidirectional & Bidirectional 
Transient Voltage Suppressors 
Microsemi 
Scottsdale Division 
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503 
Page 1
Copyright 
 2002 
6-09-2003 REV A 
W
M
.
C
SCOTTSDALE DIVISION
1N6267 thru 1N6303A 
1.5KE6.8 thru 1.5KE400A 
1
1
1
DESCRIPTION 
APPEARANCE 
The Transient Voltage Suppressor (TVS) series for 1N5908 & 1N6267-1N6303A 
are JEDEC registered selections for unidirectional devices.  The popular series 
of 1.5KE6.8-1.5KE400A offers similar voltages with an extended voltage range 
and also provides bidirectional options with a C or CA suffix.  All have the same 
high Peak Pulse Power rating of 1500 W and extremely fast response time.  
They can protect from secondary lightning effects per IEC61000-4-5 and class 
levels described herein as well as inductive switching environments and induced 
RF protection.  Since their response time is virtually instantaneous, they can also 
protect from ESD and EFT per IEC61000-4-2 and IEC61000-4-4. 
IMPORTANT:  
For the most current data, consult 
MICROSEMI’s 
 website:  
FEATURES  
Economical TVS series for thru-hole mounting  
 
Available in both Unidirectional and Bidirectional (add 
C or CA suffix for bi-directional) 
 
Voltages from 6.8 to 400 V Breakdown (V
BR
)  
 
Suppresses transients up to 1500 watts @ 10/1000 μs 
(see Figure 1)  
 
Fast response 
 
Options for screening in accordance with MIL-PRF-
19500 for JAN, JANTX, JANTXV, and JANS are 
available by adding MQ, MX, MV, or MSP prefixes 
respectively to part numbers.   
 
Surface mount equivalent packages are available as 
SMCJ5.0 - SMCJ170CA or SMCG5.0 - SMCG170CA 
(consult factory for other surface mount options) 
 
Moisture classification is Level 1 with no dry pack 
required per IPC/JEDEC J-STD-020B 
APPLICATIONS / BENEFITS 
 
Protection from switching transients and induced RF 
 
Protection from ESD and EFT per IEC 61000-4-2 and 
IEC 61000-4-4 
 
Secondary lightning protection per IEC61000-4-5 with 
42 Ohms source impedance:   
         Class 1:  1.5KE6.8A to 1.5KE200A or CA * 
         Class 2:  1.5KE5.0A to 1.5KE180A or CA * 
         Class 3:  1.5KE5.0A to 1.5KE91A or CA * 
         Class 4:  1.5KE5.0A to 1.5KE43A or CA * 
 
Secondary lightning protection per IEC61000-4-5 with 
12 Ohms source impedance: 
         Class 1 :  1.5KE5.0A to 1.5KE110A or CA *  
         Class 2:   1.5KE5.0A to 1.5KE56A or CA * 
         Class 3:   1.5KE5.0A to 1.5KE27A or CA * 
         Class 4:   1.5KE5.0A to 1.5KE13A or CA * 
 
Secondary lightning protection per IEC61000-4-5 with 
2 Ohms source impedance: 
         Class 2:  1.5KE5.0A to 1.5KE24A or CA *  
           Class 3:  1.5KE5.0 to 1.5KE12A or CA *  
*  Also applies to 1N5908 and 1Nxxxx of same voltage  
MECHANICAL AND PACKAGING 
 
CASE:  Void-free transfer molded thermosetting 
epoxy body meeting UL94V-0 
 
TERMINATIONS:  Tin-lead plated solderable per 
MIL-STD-750, method 2026  
 
POLARITY:  Cathode indicated by band.  No 
marking on bidirectional devices 
 
MARKING:  Part number  
 
TAPE & REEL option:  Standard per EIA-296 (add 
“TR” suffix to part number) 
 
WEIGHT:  1.5 grams (approximate) 
 
See package dimensions on last page 
MAXIMUM RATINGS 
Peak Pulse Power dissipation at 25
o
C:  1500 watts at 
10/1000 
μ
s (also see Fig 1,2, and 3) 
Impulse repetition rate (duty factor):  0.01% 
t
clamping
 (0 volts to V
(BR)
 min.):  < 100 ps theoretical for 
unidirectional and < 5 ns for bidirectional  
Operating and Storage temperature:  -65
o
C to +150
o
C 
Thermal Resistance:  22
o
C/W junction to lead at 3/8 
inch (10 mm) from body, or 82
C/W junction to ambient 
when mounted on FR4 PC board with 4 mm
 copper 
pads (1oz) and track width 1 mm, length 25 mm 
Steady-State Power dissipation:  5 watts at T
L
 = 40
o
C, 
or 1.52 watts at T
A 
= 25
C when mounted on FR4 PC 
board described for thermal resistance  
Forward Surge:  200 Amps peak impulse of 8.3 ms 
half-sine wave at 25oC (unidirectional only) 
Solder temperatures:  260
 o
C for 10 s (maximum) 
 
 
 
 
 
 
 
 
CASE 1