# Triac, 800 V, 12 A, TO-220AB, 1.3 V, 90 A, 40 mA

![Product image](https://novapart.co/image/farnell:3366969/)

**URL**: https://novapart.co/products/T1235T-8T/triac-800-v-12-a-to-220ab-13-90-40-ma
**SKU**: T1235T-8T
**Manufacturer**: STMICROELECTRONICS
**Price**: €0.3780
**Stock**: 500+
**Lead Time**: 120 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2025) |
| No. Of Pins | 3Pins |
| Product Range | Snubberless |
| Triac Case Style | TO-220AB |
| Thyristor Mounting | Through Hole |
| Holding Current Max | 40mA |
| On State Rms Current | 12A |
| Peak On State Voltage | 1.55V |
| Gate Trigger Voltage Max | 1.3V |
| Operating Temperature Max | 150°C |
| Peak Non Repetitive Surge Current | 90A |
| Peak Repetitive Off State Voltage | 800V |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3366969/)

**T1235T-8T** 

Datasheet 

## 12 A 800 V Snubberless Triac in TO-220AB package 

## **Features** 

**==> picture [101 x 191] intentionally omitted <==**

**----- Start of picture text -----**<br>
A2<br>G<br>A1<br>A2<br>| IN G<br>A2<br>A1<br>TO-220AB<br>**----- End of picture text -----**<br>


- Medium current Triac 

- High static and dynamic commutation 

- Three quadrants 

- ECOPACK2 compliant 

## **Applications** 

- General purpose AC line load switching 

- Motor control circuits 

- Small home appliances 

- Lighting 

- Inrush current limiting circuits 

- Overvoltage crowbar protection 

## **Description** 

Available in through-hole package, the T1235T-8T Triac can be used for the on/off or phase angle control function in general purpose AC switching where high commutation capability is required. 

This device can be used without a snubber circuit when the limits defined in this datasheet are respected. 

## **Product status link** ~~[Po~~ T1235T-8T 

|**Product summary**<br>~~[Po~~|**Product summary**<br>~~[Po~~|
|---|---|
|**Order code**|T1235T-8T|
|**Package**|TO-220AB|
|**IT(RMS)**|12 A|
|**VDRM/VRRM**|800 V|
|**VDSM/VRSM**|900 V|
|**IGT**|35 mA|



**DS9635** - **Rev 4** - **September 2019** For further information contact your local STMicroelectronics sales office. 

www.st.com 

**T1235T-8T Characteristics** 

**1** 

## **Characteristics** 

**Table 1. Absolute maximum ratings (limiting values)** 

|**Symbol**|**Parameter**|||**Value**|**Unit**|
|---|---|---|---|---|---|
|IT(RMS)|On-state RMS current (full sine wave)||Tc= 131 °C|12|A|
|ITSM|Non repetitive surge peak on-state current (Tjinitial = 25 °C)|F = 50 Hz|t = 20 ms|90|A|
|||F = 60 Hz|t = 16.7 ms|95||
|I2t|I2t value for fusing, (Tjinitial = 25 °C)||tp= 10 ms|54|A2s|
|VDRM/VRRM|Repetitive surge peak off-state voltage||Tj= 150 °C|600|V|
||||Tj= 125 °C|800||
|VDSM/VRSM|Non repetitive surge peak off-state voltage||tp= 10 ms|900|V|
|dl/dt|Critical rate of rise of on-state current<br>IG= 2 x IGT, tr ≤ 100 ns||F = 100 Hz|100|A/µs|
|IGM|Peak gate current|tp= 20 µs|Tj= 150 °C|4|A|
|PG(AV)|Average gate power dissipation||Tj= 150 °C|1|W|
|Tstg|Storage junction temperature range|||-40 to +150|°C|
|Tj|Operating junction temperature range|||-40 to +150|°C|
|TL|Maximum lead temperature soldering during 10 s|||260|°C|



**Table 2. Electrical characteristics (Tj = 25 °C unless otherwise specified)** 

|**Symbol**|**Test conditions**|||**Value**|**Unit**|
|---|---|---|---|---|---|
|IGT (1)|VD= 12 V, RL= 30 Ω|I - II - III|Min.|1.75|mA|
||||Max.|35||
|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.|0.2|V|
|IH|IT= 500 mA||Max.|40|mA|
|IL|IG= 1.2 x IGT|I - III|Max.|60|mA|
|||II||65||
|dV/dt(2)|VD= 536 V, gate open|Tj= 125 °C|Min.|2000|V/µs|
||VD = 402 V, gate open|Tj= 150 °C||1000||
|(dI/dt)c(2)|Without snubber (dV/dt)c > 20 V/μs|Tj= 125 °C|Min.|12|A/ms|
|||Tj= 150 °C||6||



_1. Minimum IGT is guaranteed at 5% of IGT max._ 

_2. For both polarities of A2 referenced to A1_ 

**DS9635** - **Rev 4** 

**page 2/11** 

**T1235T-8T Characteristics** 

## **Table 3. Static characteristics** 

|**Symbol**|**Test conditions**|**Test conditions**|**Test conditions**|**Value**|**Unit**|
|---|---|---|---|---|---|
|VT (1)|ITM= 17 A, tp= 380 µs|Tj= 25 °C|Max.|1.55|V|
|VTO(1)|Threshold voltage|Tj= 150 °C|Max.|0.85||
|Rd(1)|Dynamic resistance|Tj= 150 °C|Max.|37|mΩ|
|IDRM, IRRM|VD= VR= 800 V|Tj= 25 °C|Max.|7.5|µA|
|||Tj= 125 °C||1.0|mA|
||VD= VR= 600 V|Tj= 150 °C|Max.|2.7||



_1. For both polarities of A2 referenced to A1_ 

**Table 4. Thermal parameters** 

|**Symbol**|**Parameter**|**Value**|**Unit**|
|---|---|---|---|
|Rth(j-c)|Junction to case (AC)|1.3|°C/W|
|Rth(j-a)|Junction to ambient|60|°C/W|



**DS9635** - **Rev 4** 

**page 3/11** 

**T1235T-8T Characteristics (curves)** 

## **1.1 Characteristics curves** 

**==> picture [513 x 191] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 1. Maximum power dissipation versus on-state Figure 2. On-state RMS current versus case temperature<br>RMS current (full cycle) (full cycle)<br>P(W)<br>16 14 IT(RMS)(A)<br>14<br>12<br>12<br>10<br>10<br>8<br>8<br>6 6<br>4 4<br>180°<br>2 IT(RMS)(A) 2<br>0 0 TC(°C)<br>0 2 4 6 8 10 12 0 25 5 0 75 100 125 150<br>**----- End of picture text -----**<br>


**==> picture [513 x 191] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 3.  On-state RMS current versus ambient Figure 4. Relative variation of thermal impedance versus<br>temperature (free air convection) pulse duration<br>3.0 IT(RMS)(A) 1.0E+00 K = [Zth / Rth]<br>2.5 Zth(j-c) Zth(j-a)<br>2.0<br>1.5 1.0E-01<br>1.0<br>0.5<br>0.0 Ta(°C) 1.0E-02 tp (s)<br>0 2 5 50 75 100 125 150 1.0E-03 1.0E-02 1.0E-01 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04<br>**----- End of picture text -----**<br>


**==> picture [513 x 192] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 6. Surge peak on-state current versus number of<br>Figure 5. On-state characteristics (maximum values)<br>cycles<br>100 ITM(A) 100 ITSM(A)<br>90<br>T max:j 80 t = 20 ms<br>Vt0 = 0.85 V<br>Rd = 37 mΩ 7060 TNon repetitivej initial=25 °C One cycle<br>10 50<br>40<br>30<br>20<br>Tj=150 °C Tj=25 °C VTM(V) 10 TRepetitiveC=131 °C Number of cycles<br>1 0<br>0.0 0 .5 1.0 1 .5 2.0 2 .5 3.0 3 .5 4.0 1 10 100 1000<br>**----- End of picture text -----**<br>


**DS9635** - **Rev 4** 

**page 4/11** 

**T1235T-8T Characteristics (curves)** 

**Figure 7. Non repetitive surge peak on-state current** 

**==> picture [214 x 138] intentionally omitted <==**

**----- Start of picture text -----**<br>
1000 ITSM(A)<br>Tj initial = 25 °C<br>dl/dt limitation: 100 A/  µs<br>ITSM<br>100<br>10 sinusoidal pulse with width t p<10 ms t ( ms)p<br>0.01 0.10 1.00 10.00<br>**----- End of picture text -----**<br>


**Figure 8. Relative variation of gate trigger current and gate voltage versus junction temperature (typical values)** 

**==> picture [214 x 136] intentionally omitted <==**

**----- Start of picture text -----**<br>
2.0 IGT, VGT [T] / Ij GT, VGT [Tj = 25 °C]<br>IGT Q3<br>1.5<br>IGT Q1 - Q2<br>VGT<br>1.0<br>0.5<br>TC(°C)<br>0.0<br>-50 -25 0 25 50 7 5 100 125 150<br>**----- End of picture text -----**<br>


**Figure 9. Relative variation of static dV/dt immunity versus junction temperature (typical values)** 

**==> picture [214 x 137] intentionally omitted <==**

**----- Start of picture text -----**<br>
5 dV/dt [T j] / dV/dt [T j = 150 °C]<br>VD=VR= 402 V<br>4<br>3<br>2<br>1<br>Tj(°C)<br>0<br>25 50 75 100 125 150<br>**----- End of picture text -----**<br>


**Figure 10. Relative variation of holding current and latching current versus junction temperature (typical values)** 

**==> picture [214 x 136] intentionally omitted <==**

**----- Start of picture text -----**<br>
2.0 IH, I [ T] / IL j H, I [ TL j = 25 °C]<br>1.5<br>1.0<br>IL<br>0.5<br>IH<br>T (°C)j<br>0.0<br>-50 -25 0 25 50 7 5 100 125 150<br>**----- End of picture text -----**<br>


**==> picture [513 x 202] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 11. Relative variation of critical rate of decrease of Figure 12. Relative variation of critical rate of decrease of<br>main current (di/dt)c versus reapplied (dV/dt)c (typical main current (di/dt)c versus junction temperature (typical<br>values) values)<br>4 (dI/dt)c [ ( dV/dt)c ] / Specified (dI/dt)c 9 (dl/dt)c [T j] / (dl/dt)c [T j = 150 °C]<br>8<br>3 7<br>6<br>5<br>2<br>4<br>3<br>1<br>2<br>1<br>0 (dV/dt)c (V/µs) 0 T (°C)j<br>0.1 1.0 10.0 100.0 25 50 75 100 125 150<br>**----- End of picture text -----**<br>


**DS9635** - **Rev 4** 

**page 5/11** 

**T1235T-8T Characteristics (curves)** 

## **Figure 13. Relative variation of leakage current versus junction temperature for VD = VDRM / VR = VRRM blocking voltage (typical values)** 

**==> picture [215 x 140] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.0E+00 IDRM, IRRM [ T;  Vj DRM, VRRM] / IDRM, IRRM<br>VDRM = VRRM = 800 V<br>1.0E-01<br>VDRM = VRRM = 600 V<br>1.0E-02 VDRM = VRRM = 400 V<br>[Tj=125 °C; 800 V]<br>[Tj=150 °C; 600 V]<br>1.0E-03<br>T (°C)j<br>1.0E-04<br>25 50 75 100 125 150<br>**----- End of picture text -----**<br>


**DS9635** - **Rev 4** 

**page 6/11** 

**T1235T-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 353] intentionally omitted <==**

**DS9635** - **Rev 4** 

**page 7/11** 

**T1235T-8T TO-220AB package information** 

**Table 5. TO-220AB package mechanical data** 

||**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|
|---|---|---|---|---|---|---|
|**Ref.**|**Millimeters**|||**Inches**|||
||**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._ 

**DS9635** - **Rev 4** 

**page 8/11** 

**T1235T-8T Ordering information** 

## **3 Ordering information** 

**Figure 15. Ordering information scheme** 

**==> picture [362 x 186] intentionally omitted <==**

**----- Start of picture text -----**<br>
T      12     35    T    -   8        T<br>Triac<br>Current<br>12 = 12 A<br>Gate sensitivity<br>35 = 35 mA<br>Specific application<br>T = Increased (dl/dt)c and dV/dt producing reduced ITSM<br>Voltage (VDRM, VRRM)<br>8 = 800 V<br>Package<br>T = TO-220AB<br>**----- End of picture text -----**<br>


**Table 6. Ordering information** 

|**Order code**|**Marking**|**Package**|**Weight**|**Base qty.**|**Delivery mode**|
|---|---|---|---|---|---|
|T1235T-8T|T1235T-8T|TO-220AB|2.0 g|50|Tube|



**DS9635** - **Rev 4** 

**page 9/11** 

**T1235T-8T** 

## **Revision history** 

## **Table 7. Document revision history** 

|**Date**|**Revision**|**Changes**|
|---|---|---|
|05-Aug-2013|1|Initial release.|
|01-Jul-2014|2|Updated Table 2.|
|28-Jul-2014|3|Updated Table 5.|
|13-Sep-2019|4|UpdatedFigure 14andTable 5.|



**DS9635** - **Rev 4** 

**page 10/11** 

**T1235T-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. 

© 2019 STMicroelectronics – All rights reserved 

**DS9635** - **Rev 4** 

**page 11/11** 



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