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PDF ST-34B Data sheet ( Hoja de datos )

Número de pieza ST-34B
Descripción Thyristors
Fabricantes Littelfuse 
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Teccor® brand Thyristors
Standard Bidirectional DIAC Trigger
HTxxx & HTMxxx & STxxx Series
Schematic Symbol
Applications
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.
Description
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.
Features & Benefits
t compliant
t#JMBUFSBMUSJHHFSJOHEFWJDF
t(MBTTQBTTJWBUFE
junctions
t8JEFWPMUBHFSBOHF
selections
t-POHUFSNSFMJBCJMJUZ
t1BSBNFUFSTUBCJMJUZ
t3FMJBCMFCBSSJFSBHBJOTU
junction contamination
ST Series:
t&QPYZ4.QBDLBHF
(DO-214)
t)JHIUFNQFSBUVSF TPMEFS
bonded die attachment
HTM/HT Series:
t.*/*.&-'%0USJHHFS
package
Absolute Maximum Ratings
Symbol
Parameter
ITRM Pulse On-State Current
TS
TJ
PD(AV)
Storage Temperature Range
Operating Junction Temperature
Device Power Dissipation
(*)Only Applies to HT-60
Notes:
1. Service Dissipation (at TA= -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
Test Conditions
120PPS, TA ≤ 40°C
pulse width = 10 μS
TA = -40°C to +40°C
Min Max Unit
2
1.5(*)
A
-40 +125
°C
-40 +125
°C
See Product
Selector Table
mW
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
337
Revised: July 9, 2008
HTxxx & HTMxxx & STxxx Series
http://www.Datasheet4U.com

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ST-34B pdf
Teccor® brand Thyristors
Standard Bidirectional DIAC Trigger
Physical Specifications
Terminal Finish
Body Material
Lead Material
100% Matte-Tin Plated/ Pb-Free Solder
Dipped
DO-214: UL recognized epoxy meeting
flammabilty classification 94V-0.
DO-35/MINIMELF: Glass case body
DO-214: Copper Alloy
DO-35/MINIMELF: Copper Clad Iron
Design Considerations
Careful selection of the correct device for the application’s
operating parameters and environment will go a long
way toward extending the operating life of the Thyristor.
Overheating and surge currents are the main killers of
DIACs. Correct mounting, soldering, and forming of the
leads also help protect against component damage.
Dimensions – MINIMELF / SOD-80 (MM Package)
A
C
C
B
ED
.002 E-F
F
Reliability/Environmental Tests
Test
High Temperature
Voltage Blocking
Temperature Cycling
Temperature/
Humidity
High Temp Storage
Low-Temp Storage
Thermal Shock
Autoclave
Resistance to
Solder Heat
Solderability
Lead Bend
Burn-in
Specifications and Conditions
MIL-STD-750, M-1040, Cond A Applied
80% of Rated Min VBO (VAC-peak) @
125°C for 1008 hours
MIL-STD-750, M-1051,
100 cycles; -40°C to +150°C;
15-min dwell-time
EIA / JEDEC, JESD22-A101
1008 hours; 80% of Rated Min VBO (VDC):
85°C; 85%
rel humidity
MIL-STD-750, M-1031,1008 hours; 150°C
1008 hours; -40°C
MIL-STD-750, M-1056
10 cycles; 0°C to 100°C; 5-min dwell
time at each temperature; 10 sec (max)
transfer time between temperature
EIA / JEDEC, JESD22-A102 168 hours
(121°C at 2 ATMs) and 100% R/H
MIL-STD-750 Method 2031
ANSI/J-STD-002, category 3, Test A
MIL-STD-750, M-2036 Cond E
1 firing per 1/2 cycle, 168 hours
Inches
Dimensions
Min Typ Max
A 0.125 0.134 0.142
B 0.066 0.068 0.070
C 0.012 0.018 0.020
D — 0.063 —
Millimeters
Min Typ Max
3.18 3.40 3.61
1.68 1.73 1.78
0.30 0.46 0.51
— 1.60 —
Dimensions – DO-35 (Y Package)
A
B
C
B
E
TYP.
D (TYP.)
Dimension
Inches
Min Max
Millimeters
Min Max
A (Note 1)
0.060
0.090
1.530
2.280
B (Note 2)
0.015
0.381
C (Note 1)
0.135
0.165
3.430
4.190
D
0.018
0.022
0.458
0.558
E 1.000
25.400
Notes:
1. Package contour optional within dimensions A and C. Slugs, if any, shall be included
within this cylinger but shall not be subject to
the minimum limit of Dimention A.
2. Lead diameter is not controlled in this zone to allow for flash, lead finish build-up and
minor irregularities other than slugs.
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
341
Revised: July 9, 2008
HTxxx & HTMxxx & STxxx Series

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