# Triac, 800 V, 12 A, TO-220AB, 1.3 V, 120 A, 35 mA
**URL**: https://novapart.co/products/T1235H-8T/triac-800-v-12-a-to-220ab-13-120-35-ma
**SKU**: T1235H-8T
**Manufacturer**: STMICROELECTRONICS
**Price**: €0.6390
**Stock**: 100+
**Lead Time**: 120 days (indicative)
## Specifications
| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2025) |
| No. Of Pins | 3Pins |
| Product Range | - |
| Triac Case Style | TO-220AB |
| Thyristor Mounting | Through Hole |
| Holding Current Max | 35mA |
| On State Rms Current | 12A |
| Peak On State Voltage | 1.5V |
| Gate Trigger Voltage Max | 1.3V |
| Operating Temperature Max | 150°C |
| Peak Non Repetitive Surge Current | 120A |
| Peak Repetitive Off State Voltage | 800V |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:3680091/)
**T1235H-8T**
Datasheet
12 A - 800 V - 150 °C 8H Triac in TO-220AB
## **Features**
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**----- Start of picture text -----**
A2
G
A1
A2
G
A2
A1
TO-220AB
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- 12 A medium current Triac
- 800 V symmetrical blocking voltage
- 150 °C maximum junction temperature Tj
- Three triggering quadrants
- High noise immunity - static dV/dt
- Robust dynamic turn-off commutation - (dl/dt)c
- ECOPACK2 compliant component
- Molding resin UL94-V0 flammability certified
## **Applications**
- General purpose AC line load control
- AC induction and universal motor control
- Lighting and automation I/O control
- Water heater, room heater and coffee machine
- Home automation smart AC plug
- Inrush current limiter in AC DC rectifiers
## **Description**
## **Product status link**
T1235H-8T
|**Product summary**|**Product summary**|
|---|---|
|**IT(RMS)**|12 A|
|**VDRM/VRRM**|800 V|
|**VDSM/VRSM**|900 V|
|**IGT**|35 mA|
|**Tj max.**|150 °C|
Specifically designed to operate at 800 V and 150 °C, the T1235H-8T Triac housed in TO-220AB provides an enhanced thermal management: this 12 A Triac is the right choice for a compact drive of heavy AC loads and enables the heatsink size reduction.
Based on the ST Snubberless high temperature technology, it offers higher specified turn off commutation and noise immunity levels up to the Tj max.
The T1235H-8T safely optimizes the control of the hardest universal motors, heaters and inductive loads for industrial control and home appliances.
Snubberless is a trademark of STMicroelectronics.
**DS13575** - **Rev 2** - **December 2020** For further information contact your local STMicroelectronics sales office.
www.st.com
**T1235H-8T Characteristics**
## **1 Characteristics**
**Table 1. Absolute maximum ratings (limiting values)**
|**Symbol**|**Parameter**||**Value**|**Unit**|
|---|---|---|---|---|
|IT(RMS)|RMS on-state current (full sine wave)|Tc= 135 °C|12|A|
|ITSM|Non repetitive surge peak on-state current (full cycle,
Tjinitial = 25 °C)|t = 16.7 ms|126|A|
|||t = 20 ms|120||
|I2t|I2t value for fusing|tp= 10 ms|95|A2s|
|dl/dt|Critical rate of rise of on-state current, IG= 2 x IGT, tr
≤ 100 ns, f = 100 Hz|Tj= 25 °C|100|A/µs|
|VDRM/VRRM|Repetitive peak off-state voltage||800|V|
|VDSM/VRSM|Non Repetitive peak off-state voltage|tp= 10 ms, Tj= 25 °C|900|V|
|IGM|Peak gate current|tp= 20 µs, Tj= 150 °C|4|A|
|PGM|Maximum gate power dissipation||5|W|
|PG(AV)|Average gate power dissipation|Tj= 150 °C|1|W|
|Tstg|Storage temperature range||-40 to +150|°C|
|Tj|Operating junction temperature range||-40 to +150|°C|
|TL|Maximum lead temperature for soldering during 10 s||260|°C|
**Table 2. Electrical characteristics (Tj = 25 °C, unless otherwise specified)**
|**Symbol**|**Test conditions**|**Test conditions**|**Quadrants**||**Value**|**Unit**|
|---|---|---|---|---|---|---|
|IGT|VD= 12 V, RL= 30 Ω||I - II - III|Min.|5|mA|
|||||Max.|35|mA|
|VGT|VD= 12 V, RL= 30 Ω||I - II - III|Max.|1.3|V|
|VGD|VD= VDRM, RL= 3.3 kΩ|Tj= 150 °C|I - II - III|Min.|0.15|V|
|IL|IG= 1.2 x IGT||I - III|Max.|50|mA|
||||II|Max.|80|mA|
|IH (1)|IT= 500 mA, gate open|||Max.|35|mA|
|dV/dt(1)|VD= VR= 536 V, gate open||Tj= 150 °C|Min.|2000|V/µs|
|(dl/dt)c(1)|Without snubber network||Tj= 150 °C|Min.|12|A/ms|
_1. For both polarities of A2 referenced to A1._
**DS13575** - **Rev 2**
**page 2/11**
**T1235H-8T Characteristics**
## **Table 3. Static characteristics**
|**Symbol**|**Test conditions**|**Tj**||**Value**|**Unit**|
|---|---|---|---|---|---|
|VTM (1)|ITM= 17 A, tp= 380 µs|25 °C|Max.|1.50|V|
|VTO (1)|Threshold voltage|150 °C|Max.|0.80|V|
|RD(1)|Dynamic resistance|150 °C|Max.|32|mΩ|
|IDRM/IRRM|VD= VR= VDRM= VRRM|25 °C|Max.|2.0|µA|
|||150°C||4.5|mA|
||VD= VR= 400 V, peak voltage|150 °C|Max.|1.7|mA|
_1. For both polarities of A2 referenced to A1._
## **Table 4. Thermal resistance**
|**Symbol**|**Parameter**|**Parameter**|**Value**|**Unit**|
|---|---|---|---|---|
|Rth(j-c)|Junction to case (AC)|Max.|1.1|°C/W|
|Rth(j-a)|Junction to ambient|Typ.|60|°C/W|
**DS13575** - **Rev 2**
**page 3/11**
**T1235H-8T Characteristics (curves)**
## **1.1 Characteristics (curves)**
**Figure 1. Maximum power dissipation versus on-state Figure 2. On-state RMS current versus case temperature RMS current (full cycle) (full cycle)**
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P(W)
14
12
α = 180°
10
8
6
4
2 180°
IT(RMS)(A)
0
0 2 4 6 8 10 12
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**----- Start of picture text -----**
IT(RMS)(A)
14
12
α = 180°
10
8
6
4
2
Tc(°C)
0
0 25 50 75 100 125 150
**----- End of picture text -----**
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**----- Start of picture text -----**
Figure 3. On-state RMS current versus ambient
Figure 4. On-state characteristics (maximum values)
temperature (free air convection)
ITM(A)
IT(RMS)(A) 1000
3.5
Tj max.
Vto = 0.8 V
3 α = 180° Rd = 32 mΩ
2.5 100
2
Tj = 150 °C
1.5
10
1 Tj = 25 °C
0.5
Ta(°C) VTM(V)
0 1
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
0 25 50 75 100 125 150
**----- End of picture text -----**
**==> picture [513 x 202] intentionally omitted <==**
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Figure 6. Recommended maximum case-to-ambient
Figure 5. Relative variation of thermal impedance versus
thermal resistance versus ambient temperature for
pulse duration
different peak off-state voltages
K = [Zth/Rth]
1.0E+00 70 Rth(c-a) (°C/W) (for heatsink sizing to avoid thermal runaway)
Junction-to -ambiant thermal resistance:
Typical 60 °C/W (without heatsink)
Zth(j-c) 60
1.0E-01 50 V= 600 VD = V R V= 400 VD = V R
V D = V R
Zth(j-a) = 800 V
40
30
1.0E-02
20
10
1.0E-03 tp(s) With 15°C/W heatsink Ta (°C)
0
1.0E-03 1.0E-02 1.0E-01 1.0E+00 1.0E+01 1.0E+02 1.0E+03
20 40 60 80 100 120 140
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**DS13575** - **Rev 2**
**page 4/11**
**T1235H-8T Characteristics (curves)**
**==> picture [513 x 202] intentionally omitted <==**
**----- Start of picture text -----**
Figure 8. Relative variation of holding current and
Figure 7. Relative variation of gate trigger voltage and
latching current versus junction temperature (typical
current versus junction temperature (typical values)
values)
IGT,VGT[Tj] / IGT,VGT[Tj = 25 °C]
2.5 IH,IL [Tj] / IH,IL [Tj = 25 °C]
2
2 IGT Q3
1.6
1.5 IGT Q1-Q2 1.2
1 VGT IL
0.8
0.5
0.4 IH
0 Tj (°C) Tj (°C)
-50 -25 0 25 50 75 100 125 150 0
-50 -25 0 25 50 75 100 125 150
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**==> picture [513 x 193] intentionally omitted <==**
**----- Start of picture text -----**
Figure 9. Surge peak on-state current versus number of Figure 10. Non repetitive surge peak on-state current for a
cycles sinusoidal pulse with width tp < 10 ms
ITSM(A) ITSM(A)
150 10000
Tj initial = 25 °C
t =20ms
Non repetitive One cycle
100 Tj initial = 25 °C 1000
dl/dt limitation: 100 A/µs I
TSM
50 100
Repetitive
Tc = 135°C
0 Number of cycles 10 tp(ms)
1 10 100 1000 0.01 0.10 1.00 10.00
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**Figure 11. Relative variation of static dV/dt immunity versus junction temperature**
**==> picture [222 x 149] intentionally omitted <==**
**----- Start of picture text -----**
dV/dt [Tj] / dV/dt [Tj = 150 °C]
4
VD = VR = 536 V
3
2
1
Tj(°C)
0
25 50 75 100 125 150
**----- End of picture text -----**
**Figure 12. Relative variation of critical rate of decrease of main current versus junction temperature**
**==> picture [225 x 151] intentionally omitted <==**
**----- Start of picture text -----**
14 (dl/dt)c [Tj] / (dl/dt)c [Tj = 150 °C]
12
10
8
6
4
2
Tj(°C)
0
25 50 75 100 125 150
**----- End of picture text -----**
**DS13575** - **Rev 2**
**page 5/11**
**T1235H-8T Characteristics (curves)**
## **Figure 13. Relative variation of leakage current versus junction temperature for different values of blocking voltage**
**==> picture [226 x 148] intentionally omitted <==**
**----- Start of picture text -----**
IDRM/IRRM [Tj, VDRM/VRRM] / IDRM/IRRM [Tj max.,800 V]
1.0E+00
1.0E-01
VD = VR = 800 V
1.0E-02
VD = VR = 600 V
1.0E-03
1.0E-04
Tj(°C)
1.0E-05
25 50 75 100 125 150
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**DS13575** - **Rev 2**
**page 6/11**
**T1235H-8T Package information**
## **2 Package information**
In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ECOPACK is an ST trademark.
## **2.1 TO-220AB package information**
- Epoxy resin is halogen free and meets UL94 flammability standard, level V0
- Lead-free plating package leads
- Recommended torque: 0.4 to 0.6 N·m
**Figure 14. TO-220AB package outline**
**==> picture [319 x 352] intentionally omitted <==**
**DS13575** - **Rev 2**
**page 7/11**
**T1235H-8T TO-220AB package information**
**Table 5. TO-220AB package mechanical data**
||**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|
|---|---|---|---|---|---|---|
|**Ref.**|**Millimeters**|||**Inches(1)**|||
||**Min.**|**Typ.**|**Max.**|**Min.**|**Typ.**|**Max.**|
|A|15.20||15.90|0.5984||0.6260|
|a1||3.75|||0.1476||
|a2|13.00||14.00|0.5118||0.5512|
|B|10.00||10.40|0.3937||0.4094|
|b1|0.61||0.88|0.0240||0.0346|
|b2|1.23||1.32|0.0484||0.0520|
|C|4.40||4.60|0.1732||0.1811|
|c1|0.49||0.70|0.0193||0.0276|
|c2|2.40||2.72|0.0945||0.1071|
|e|2.40||2.70|0.0945||0.1063|
|F|6.20||6.60|0.2441||0.2598|
|I|3.73||3.88|0.1469||0.1528|
|L|2.65||2.95|0.1043||0.1161|
|I2|1.14||1.70|0.0449||0.0669|
|I3|1.14||1.70|0.0449||0.0669|
|I4|15.80|16.40|16.80|0.6220|0.6457|0.6614|
|M||2.6|||0.1024||
_1. Inch dimensions are for reference only._
**DS13575** - **Rev 2**
**page 8/11**
**T1235H-8T Ordering information**
## **3 Ordering information**
**Figure 15. Ordering information scheme**
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**----- Start of picture text -----**
T 12 35 H - 8 T
Series
T = Triac
RMS current
12 = 12 A
Gate triggering current
35 = 35 mA
High temperature
H = High noise immunity and robust commutations
Voltage
8 = 800 V
Package
T = TO-220-AB
Packing
Blank = Tube
**----- End of picture text -----**
**Table 6. Ordering information**
|**Order code**|**Marking**|**Package**|**Weight**|**Base qty.**|**Delivery mode**|
|---|---|---|---|---|---|
|T1235H-8T|T1235H-8T|TO-220AB|2.1 g|50|Tube|
**DS13575** - **Rev 2**
**page 9/11**
**T1235H-8T**
## **Revision history**
**Table 7. Document revision history**
|**Date**|**Version**|**Changes**|
|---|---|---|
|20-Nov-2020|1|Initial release.|
|16-Dec-2020|2|Updated general description.|
**DS13575** - **Rev 2**
**page 10/11**
**T1235H-8T**
## **IMPORTANT NOTICE – PLEASE READ CAREFULLY**
STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement.
Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products.
No license, express or implied, to any intellectual property right is granted by ST herein.
Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product.
ST and the ST logo are trademarks of ST. For additional information about ST trademarks, please refer to www.st.com/trademarks. All other product or service names are the property of their respective owners.
Information in this document supersedes and replaces information previously supplied in any prior versions of this document.
© 2020 STMicroelectronics – All rights reserved
**DS13575** - **Rev 2**
**page 11/11**
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