參數(shù)資料
型號: P1800SCRP
英文描述: SIDAC|220V V(BO) MAX|800MA I(S)|DO-214AA
中文描述: SIDAC的| 220五(公報)最大| 800mA的我(縣)|的DO - 214AA
文件頁數(shù): 120/161頁
文件大?。?/td> 986K
代理商: P1800SCRP
Construction and Operation
SIDACtor
Data Book
5 - 4
Teccor Electronics
(972) 580-7777
amounts of current because of the low voltage drop (V
T
) across the device. Once the
current flowing through the device is either interrupted or falls below a minimum
holding current (I
H
), the SIDACtor resets, returning to its off-state.
Physics
The SIDACtor is a semiconductor device which is characterized as having four layers
of alternating conductivity; PNPN. The four layers include an emitter layer, an upper
base layer, a mid-region layer and a lower base layer. The emitter is sometimes
referred to as a cathode region, with the lower base layer being referred to as an
anode region.
As the voltage across the SIDACtor increases and exceeds the devices V
DRM
, the
electric field across the center junction reaches a value sufficient to cause avalanche
multiplication. As avalanche multiplication occurs, the impedance of the device begins
to decrease and current flow begins to increase until the SIDACtor
s current gain
exceeds unity. Once unity is exceeded, the SIDACtor switches from a high impedance
(measured at V
S
) to a low impedance (measured at V
T
) until the current flowing
through the device is reduced below it
s holding current (I
H
).
Figure 5-2 Geometric Structure of Bidirectional SIDACtors
P
N
N
N
P
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