NTE4903 查看數據表（PDF） - NTE Electronics
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NTE4903 Datasheet PDF : 2 Pages
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NTE4903 thru NTE4999
Surge Clamping, Transient Overvoltage Suppressor
Bidirectional
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 (TA = +25°C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1500W
tclamping (0 volts to Bv Min) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 5 x 10–9 sec
Operating and Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to +175°C
Forward Surge Rating 200 Amps, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1/20 Second at +25°C
Steady State Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0 W @ T1 = +25°C
Electrical Characteristics:
Clamping Factor: 1.33 @ full rated power
1.20 @ 50% rated power
The clamping factor is defined as: The ratio of the actual VC (Clamping Voltage) to the actual BV
(Breakdown Voltage) as measured on a specific device.
NTE Type Diagram
Number Number
Maximum Reverse
Stand Off Voltage
(Volts)
VR
4903 183
4905 183
4907 183
4911 183
4915 183
5.50
6.40
7.02
8.55
10.20
Min
6.12
7.13
7.79
9.50
11.40
Breakdown Voltage @ IT
(Volts)
VBR
Typ
Max
6.80 7.48
7.50 7.88
8.20 8.61
10.00 10.50
12.00 12.60
IT mA
10.0
10.0
10.0
10.0
1.0
Clamping Voltage
@ Ipp (1msec)
(Volts)
VC
Maximum Ratings
Reverse Leakage
Current @ VR
(µA)
IR
10.8
1000.0
11.3
500.0
12.1
200.0
14.5
10.0
16.7
5.0
Peak Pulse
Current
(Amps)
Ipp
139.00
132.00
124.00
103.00
90.00
Temperature
Coefficient
of BV%/°C
0.057
0.061
0.065
0.073
0.078
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