NTE4951 NTE Electronics, Inc., NTE4951 Datasheet
NTE4951
Manufacturer Part Number
NTE4951
Description
Overvoltage Suppressor, Transient
Manufacturer
NTE Electronics, Inc.
Type
Networkr
Datasheet
1.NTE4951.pdf
(2 pages)
Specifications of NTE4951
Current, Surge
21.4 A
Dimensions
9.52mmL×5.21mmDia.
Mounting Type
Thru-Hole
Package Type
Axial
Primary Type
Transient Voltage Surge Suppressor
Termination
Solder
Voltage, Clamping
70.1 V
Lead Free Status / Rohs Status
RoHS Compliant part
For Use With
Data/Comm, Industrial Equipment
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
integrated 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
Note 1. NTE4908 and NTE4909 are discontinued devices and no longer available.
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
4903
4905
4907
4911
4915
Diagram
Number
(0 volts to Bv Min)
183
183
183
183
183
Surge Clamping, Transient Overvoltage Suppressor
Maximum Reverse
Stand Off Voltage
(Volts)
10.20
1.20 @ 50% rated power
V
5.50
6.40
7.02
8.55
R
11.40
Min
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.12
7.13
7.79
9.50
Breakdown Voltage @ I
NTE4903 thru NTE4999
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.00
12.00
= +25°C)
Typ
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.80
7.50
8.20
(Volts)
V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BR
Bidirectional
10.50
12.60
Max
7.48
7.88
8.61
T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I
10.0
10.0
10.0
10.0
T
1.0
mA
Clamping Voltage
@ I
pp
(Volts)
10.8
12.1
14.5
16.7
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
(µA)
5.0
I
R
R
1/20 Second at +25°C
5.0 W @ T1 = +25°C
Peak Pulse
139.00
132.00
124.00
103.00
Current
(Amps)
−65°C to +175°C
90.00
I
pp
< 5 x 10−9 sec
Temperature
Coefficient
of BV%/°C
1500W
0.057
0.061
0.065
0.073
0.078
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NTE4951 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 NTE Type Diagram ...