Littelfuse STxxx Series - Manual

337 ©2008 Littelfuse, Inc.
Revised: July 9, 2008
Teccor ® brand Thyristors
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
337 ©2008 Littelfuse, Inc.
Teccor ® brand Thyristors
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
HTxxx & HTMxxx & STxxx Series
Standard Bidirectional DIAC Trigger
DIA
Cs
HTxxx & HTMxxx & STxxx Series
The HTM, HT, and ST series of bilateral trigger DIACs offer
a range of voltage characteristics from 27V to 70V. A DIAC
semiconductor is a full-wave or bidirectional Thyristor. It is
triggered from a blocking state to a conduction state for
either polarity of applied voltage whenever the amplitude of
applied voltage exceeds the breakover voltage of the DIAC.
Description
Features & Benefits
t

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junctions
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selections
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junction contamination
ST Series:
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(DO-214)
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TPMEFS

bonded die attachment
HTM/HT Series:
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package
Schematic Symbol
Absolute Maximum Ratings
Symbol Parameter Test Conditions Min Max Unit
I
TRM
Pulse On-State Current
120PPS, T
A
≤ 40°C
pulse width = 10 μS
2
A
1.5 (*)
T
S
Storage Temperature Range -40 +125 °C
T
J
Operating Junction Temperature -40 +125 °C
P
D(AV)
Device Power Dissipation T
A
= -40°C to +40°C
See Product
Selector Table
mW
(*)Only Applies to HT-60
Notes:
1.
Service Dissipation (at T
A
= -40°C to +40°C): 250mW for DO-35 and MINIMELF/SOD-80
and 300mW for DO214
2. Above +40°C, Derate: 3.6mW/°C for DO-35 and MINIMELF/SOD-80
and 3mW/°C for DO214
DIACs are used to trigger Triacs and SCRs in phase control
circuits for lamp dimming, universal motor speed control,
and heat control. They are used also for triggering
transistors in solid state ballast lighting controls.
Applications