338
Revised: July 9, 2008
2008 Littelfuse, Inc.
Teccor
brand Thyristors
Standard Bidirectional DIAC Trigger
Please refer to http://www.littelfuse.com for current information.
Specifications are subject to change without notice.
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
(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