Littelfuse STxxx Series - Manual (Page 2)

338
Revised: July 9, 2008
©2008 Littelfuse, Inc.
Teccor ® brand Thyristors
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
Standard Bidirectional DIAC Trigger
HTxxx & HTMxxx & STxxx Series
Thermal Resistances
Symbol Description Test Conditions Value Unit
R
R(J-L)
Junction to Lead
Maximum Lead Temperature: 85°C DO-35 100 °C/W
Maximum Lead Temperature: 90°C DO-214 65* °C/W
Maximum Lead Temperature: 87°C MINIMELF 75 °C/W
R
R(J-A)
Junction to Ambient Free-Air DO-35 278 °C/W
* Mounted on 1 cm 2 copper foil surface; two-ounce copper foil
Electrical Characteristics (T
J
= 25°C, unless otherwise specified)
Symbol Description Test Conditions Min Max Unit
V
BO
Breakover/Trigger Voltage 50/60Hz Sine Wave
See Product
Selector Table
See Product
Selector Table
V
ΔV
BO
Breakover Voltage Symmetry +V
BO
to -V
BO
2 (Note 1) V
V
BB
Δ Breakback Voltage (Note 4)
V
BO
to V
10mA
5 V
V
BO
to V
6mA
(*) 15 V
V
BB (DYN)
Dynamic Δ Breakback Voltage (Notes 2 & 3) 120 PPS 10 V
I
BO
Breakover Current 50/60Hz Sine Wave 15 μA
(*) Only Applies to HT-60
Electrical Characteristic Notes:
1. Breakover voltage symmetry as close as 1V is available from the factory for
these products.
2. See Figure 4 and Figure 5 for test circuit and waveforms.
3. Typical switching time is 900 nano-seconds measured at I
PK
(Figure 4) across a
20 Ω resistor (Figure 5). Switching time is defined as rise time of I
PK
between the
10% to 90% points
4. See V-I Characteristics
Static Characteristics - Not Applicable
Product Selector
Part Number
Package Availability V
BO
MINIMELF DO-35 DO-214 MIN MAX
XX-32 — HT-32 ST-32 27V 37V
XX-32A/ 5761 — HT-32A — 28V 36V
XX-32B/ 5761A HTM-32B HT-32B ST-32B 30V 34V
XX-34B — HT-34B ST-34B 32V 36V
XX-35 — HT-35 ST-35 30V 40V
XX-36A/ 5762 — HT-36A ST-36A 32V 40V
XX-36B — HT-36B ST-36B 34V 38V
XX-40 — HT-40 ST-40 35V 45V
XX-60 — HT-60 — 56V 70V
“XX” = HTM for MINIMELF
HT for DO-35
ST for DO-214