TISP4A265H3BJ_07 Datasheet, PDF (1/8 Pages) Bourns Electronic Solutions – ASYMMETRICAL BIDIRECTIONAL THYRISTOR SPD

TISP4A265H3BJ
ASYMMETRICAL BIDIRECTIONAL THYRISTOR SPD
TISP4A265H3BJ LCAS R_LINE Protector
RING Line Protection for:
-LCAS (Line Card Access Switch)
-ADSL Interfaces
Voltages Optimized for:
-Battery-Backed Ringing Circuits
Maximum Ringing a.c. .......................................... 90 V rms
Maximum Battery Voltage .......................................... -52 V
-ADSL Voltage ......................................................... ±23 V peak
-Minimum Ambient Temperature ...................................... 0 °C
Device
‘4A265
V_DRM
V
+100
-200
V_(BO)
V
+125
-265
Rated for International Surge Wave Shapes
Wave Shape
2/10 µs
8/20 µs
10/160 µs
10/700 µs
10/560 µs
10/1000 µs
I_TSP
Standard
A
GR-1089-CORE 500
IEC 61000-4-5
300
TIA/EIA-IS-968 250
ITU-T K.20/45/21 200
TIA/EIA-IS-968 160
GR-1089-CORE 100
SMB Package (Top View)
MT1 1
2 MT2
MD4A265
Device Symbol
MT2
MT1
SD4XAN
............................................... UL Recognized Component
Description
The TISP4A265H3BJ is an asymmetrical bidirectional overvoltage protector. It is designed to limit the peak voltages on the ring line terminal of
the ‘7581/2/3 LCAS (Line Card Access Switches). The TISP4A265H3BJ must be connected with bar-indexed terminal 1, MT1, to the protective
ground and terminal 2, MT2, to the ring conductor.
The TISP4A265H3BJ voltages are chosen to give adequate LCAS ring line terminal protection for all switch conditions. The most potentially
stressful condition is low level power cross when the LCAS switches are closed. Under this condition, the TISP4A265H3BJ limits the voltage
and corresponding LCAS dissipation until the LCAS thermal trip operates and opens the switches.
Under open-circuit ringing conditions, the line ring conductor will have high peak voltages. For battery backed ringing, the ring conductor will
have a larger peak negative voltage than positive, i.e. the peak voltages are asymmetric. The TISP4A265H3BJ has a similar voltage asymmetry
and will allow the maximum possible ringing voltage, while giving the most effective protection. On a connected line, the tip conductor will
have much smaller voltage levels than the open-circuit ring conductor values. Here a TISP4xxxH3BJ series, symmetrical voltage protector
gives adequate protection.
Overvoltages are initially clipped by breakdown clamping. If sufficient current is available from the overvoltage, the breakdown voltage will rise
to the breakover level, which causes the device to switch into a low-voltage on-state condition. This switching action removes the high voltage
stress from the following circuitry and causes the current resulting from the overvoltage to be safely diverted through the protector. The high
holding (switch off) current helps prevent d.c. latchup as the diverted current subsides.
How to Order
Device
Package
TISP4A265H3BJ BJ (J-Bend DO-214AA/SMB)
Carrier
Order As
R (Embossed Tape Reeled) TISP4A265H3BJR-S
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex
JANUARY 2002 - REVISED MAY 2007
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.