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參數(shù)資料
| 型號： | NP1800SDMCT3G |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 浪涌電流限制器 |
| 英文描述： | 220 V, 60 A, SILICON SURGE PROTECTOR, DO-214AA |
| 封裝： | ROHS COMPLIANT, CASE 403C-01, SMB, 2 PIN |
| 文件頁數(shù)： | 3/6頁 |
| 文件大?。?/td> | 129K |
| 代理商： | NP1800SDMCT3G |
NPSDMC Series
http://onsemi.com
3
ELECTRICAL PARAMETER/RATINGS DEFINITIONS
Symbol
Parameter
VDRM
Repetitive Peak Offstate Voltage
V(BO)
Breakover Voltage
IDRM
Offstate Current
I(BO)
Breakover Current
IH
Holding Current
VT
Onstate Voltage
IT
Onstate Current
ITSM
Nonrepetitive Peak Onstate Current
IPPS
Nonrepetitive Peak Impulse Current
VD
Offstate Voltage
ID
Offstate Current
Figure 1. Voltage Current Characteristics of TSPD
VT
IPPS
ITSM
IT
ID
IH
Voltage
+Voltage
I
+I
I(BO)
IDRM
VD
V(BO)
VDRM
OffState Region
On
State
Region
TIME (ms)
0
50
0
Ipp
PEAK
PULSE
CURRENT
%Ipp
100
tr = rise time to peak value
tf = decay time to half value
tr
tf
Peak
Value
Half Value
1
10
100
0.1
1
10
100
1000
Figure 2. Nonrepetitive OnState Current vs. Time
(ITSM)
Figure 3. Nonrepetitive OnState Impulse vs.
Waveform (IPPS)
CURRENT DURATION (s)
PEAK
ON
ST
ATE
CURRENT
Detailed Operating Description
The TSPD or Thyristor Surge Protection Device are
specialized silicon based overvoltage protectors, used to
protect sensitive electronic circuits from damaging
overvoltage transient surges caused by induced lightning
and powercross conditions.
The TSPD protects by switching to a low on state voltage
when the specified protection voltage is exceeded. This is
known as a “crowbar” effect. When an overvoltage occurs,
the crowbar device changes from a highimpedance to a
lowimpedance state. This lowimpedance state then offers
a path to ground, shunting unwanted surges away from the
sensitive circuits.
This crowbar action defines the TSPD’s two states of
functionality: Open Circuit and Short Circuit.
Open Circuit – The TSPD must remain transparent during
normal circuit operation. The device looks like an open
across the two wire line.
Short Circuit – When a transient surge fault exceeds the
TSPD protection voltage threshold, the devices switches on,
and shorts the transient to ground, safely protecting the
circuit.
Figure 4. Normal and Fault Conditions
Protected
Equipment
+
+
V(OP)
I(OP)
TSPD
Normal Circuit Operation
Protected
Equipment
+
+
V(Fault)
I(Fault)
TSPD
Operation during a Fault
I(Fault)
STSPD looks like an open
SCircuit operates normally
SFault voltage greater than Vbo occurs
STSPD shorts fault to ground
SAfter short duration events the O/V
switches back to an open condition
SWorst case (Fail/Safe)
SO/V permanent short
SEquipment protected
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