nte4978 NTE Electronics, Inc., nte4978 Datasheet
nte4978
Manufacturer Part Number
nte4978
Description
Surge Clamping, Transient Overvoltage Suppressor Unidirectional
Manufacturer
NTE Electronics, Inc.
Datasheet
1.NTE4978.pdf
(2 pages)
Description:
The NTE4900 series of silicon Transient Suppressors designed to protect voltage sensitive compo-
nents from high energy voltage transients. Transient over voltage suppressor devices have become
very important as a consequence of their high surge capability, extremely fast response time, and low
incremental surge resistance (Rs).
Application:
The NTE4900 series has a peak pulse power rating of 1500 watts for one millisecond can protect inte-
grated circuits, hybrids, CMOS, MOS, and other voltage sensitive components in a broad range of
applications such as telecommunications, power supplies, computers, automotive, industrial, and
medical equipment.
Absolute Maximum Ratings:
Peak Pulse Power Dissipation (T
t
Operating and Storage Temperature
Forward Surge Rating 200 Amps,
Steady State Power Dissipation
Electrical Characteristics:
Clamping Factor: 1.33 @ full rated power
The clamping factor is defined as: The ratio of the actual V
(Breakdown Voltage) as measured on a specific device.
clamping
NTE Type
Number
4902
4904
4906
4910
4914
4918
Diagram
Number
(0 volts to BV Min)
183
183
183
183
183
183
Surge Clamping, Transient Overvoltage Suppressor
Maximum Reverse
Stand Off Voltage
(Volts)
10.20
11.10
1.20 @ 50% rated power
V
5.80
6.40
7.02
8.55
R
12.40
11.40
Min
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.45
7.13
7.79
9.50
NTE4902 thru NTE4998
Breakdown Voltage @ I
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.00
12.00
13.00
= +25 C)
Typ
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.80
7.50
8.20
(Volts)
V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BR
Unidirectional
10.50
12.60
13.70
Max
7.14
7.88
8.61
T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.0
10.0
10.0
I
T
1.0
1.0
1.0
mA
Clamping Voltage
@ I
pp
(Volts)
10.5
12.1
14.5
16.7
18.2
11.3
V
(1msec)
C
C
(Clamping voltage) to the actual BV
Maximum Ratings
Reverse Leakage
Current @ V
1000.0
500.0
200.0
10.0
( A)
5.0
5.0
I
R
R
1/20 Second at +25 C
5.0 W @ T1 = +25 C
Peak Pulse
143.00
132.00
124.00
103.00
Current
(Amps)
–65 C to +175 C
90.00
82.00
I
pp
1 x 10–12 sec
Temperature
Coefficient
of BV%/ C
1500W
0.057
0.061
0.065
0.073
0.078
0.081
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nte4978 Summary of contents
Page 1
Surge Clamping, Transient Overvoltage Suppressor Description: The NTE4900 series of silicon Transient Suppressors designed to protect voltage sensitive compo- nents from high energy voltage transients. Transient over voltage suppressor devices have become very important as a consequence of their high ...
Page 2
Electrical Characteristics (Cont’d): Clamping Factor: 1.33 @ full rated power 1.20 @ 50% rated power The clamping factor is defined as: The ratio of the actual V (Breakdown Voltage) as measured on a specific device. Maximum Reverse Stand Off Voltage ...