# Thyristor, 400 V, 1.5 mA, 1.8 A, 2 A, TO-220AB, 3 Pins

![Product image](https://novapart.co/image/farnell:1748964/)

**URL**: https://novapart.co/products/TN22-1500T/thyristor-400-v-15-ma-18-a-2-to-220ab-3-pins
**SKU**: TN22-1500T
**Manufacturer**: STMICROELECTRONICS
**Category**: Semiconductors - Discretes || Thyristors || Thyristors - SCRs
**Price**: €0.8410
**Stock**: 200+
**Lead Time**: 274 days (indicative)

## Description

Peak Repetitive Off-State Voltage, Vdrm:400V; Gate Trigger Current Max, Igt:1.5mA; Current It av:1.8A; On State RMS Current IT(rms):2A; Thyristor Case Style:TO-2; Available until stocks are exhausted

## Specifications

| Parameter | Value |
|---|---|
| Msl | - |
| Svhc | No SVHC (17-Dec-2015) |
| No. Of Pins | 3Pins |
| Product Range | - |
| Thyristor Mounting | Through Hole |
| Holding Current Max | 175mA |
| On State Rms Current | 2A |
| Thyristor Case Style | TO-220AB |
| Average On State Current | 1.8A |
| Gate Trigger Current Max | 1.5mA |
| Gate Trigger Voltage Max | 3V |
| Operating Temperature Max | 110°C |
| Peak Non Repetitive Surge Current | 20A |
| Peak Repetitive Off State Voltage | 400V |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:1748964/)

**TN22** 

## Fluorescent tube lamp starter SCR 

**Datasheet** - **production data** 

## **Description** 

**==> picture [201 x 125] intentionally omitted <==**

**----- Start of picture text -----**<br>
2,  TAB 1<br>3<br>TAB TAB<br>1<br>2<br>TO-220AB 2 3 3 IPAK<br>1<br>**----- End of picture text -----**<br>


The TN22 has been specifically developed for use in fluorescent tube lamp electronic starter circuits. 

Used in conjunction with a sensitive SCR, it provides high energy striking characteristics with low triggering power. 

Thanks to the optimized characteristics of the TN22, starters offer high reliability levels and extended life time of the fluorescent tube lamps. 

## **Features** 

- High clamping voltage structure (1200 to 1500 V) 

- Low gate triggering current for direct drive from line (< 1.5 mA) 

- High holding current (> 175 mA), ensuring high striking energy 

January 2016 

DocID3768 Rev 5 

1/14 

This is information on a product in full production. 

_www.st.com_ 

**Characteristics** 

**TN22** 

## **1 Characteristics** 

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

|**Symbol**|**Parameter**||**Value**|**Unit**|
|---|---|---|---|---|
|VDRM|Repetitive peak off-state voltage|Tj= 110 °C|400|V|
|IT(RMS)|On-state RMS current<br>full sine wave (180° conduction angle)|Tc= 95 °C|2|A|
|IT(AV)|Mean on-state current<br>Full sinewave (180° conduction angle)|Tc= 95 °C|1.8|A|
|ITSM|Non repetitive surge peak on-state current<br>(Tjinitial = 25 °C)|tp= 8.3 ms|22|A|
|||tp= 10 ms|20||
|I2t|I2t Value for fusing|tp= 10 ms|2|A2s|
|dl/dt|Critical rate of rise of on-state current<br>IG= 5 mA dIG/dt = 70 mA/µs||50|A/µs|
|PG(AV)|Average gate power dissipation||300|mW|
|PGM|Peak gate power dissipation|tp= 20 µs|2|W|
|IGM|Peak gate current|tp= 20 µs|1|A|
|VRGM|Maximum peak reverse gate voltage||6|V|
|Tstg<br>Tj|Storage and operating junction temperature range||-40 to +150<br>-40 to +110|°C|
|TL|Maximum lead temperature for soldering during 10 s at 4.5 mm<br>from case||260|°C|



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

||||||
|---|---|---|---|---|
|**Symbol**|**Test conditions**||**Value**|**Unit**|
|IGT|VD=12 V (DC), RL= 33|Max.|1.5|mA|
|VGT|VD=12 V (DC), RL= 33RGK= 1 K|Max.|3|V|
|IH|VGK= 0 V|Min.|175|mA|
|dV/dt|Linear slope up to VD= 67% VDRM,VGK= 0 V, Tj= 110 °C|Min.|500|V/µs|
|VBR|ID= 5 mA, VGK= 0 V|Min.|1200|V|
|||Max.|1500||



**Table 3. Static electrical characteristics (Tj = 25 °C unless otherwise stated)** 

||||||
|---|---|---|---|---|
|**Symbol**|**Test conditions**||**Value**|**Unit**|
|VTM|ITM= 2 A    tp= 380 µs|Max.|3.1|V|
|IDRM|VDRMrated|Max.|0.1|mA|



2/14 

DocID3768 Rev 5 

**Characteristics** 

**TN22** 

**Table 4. Thermal resistance** 

||**Table 4. Thermal resistance**|**Table 4. Thermal resistance**|||
|---|---|---|---|---|
|**Symbol**|**Parameter**||**Value**|**Unit**|
|Rth(j-a)|Junction to ambient|IPAK<br>TO-220AB|100|°C/W|
||||60||
|Rth(j-c)|Junction to case||3|°C/W|



## **Figure 1. Maximum average power dissipation versus average on-state current (rectified sine wave)** 

## **Figure 2. Average and DC on-state current versus case temperature (rectified sine wave)** 

**Figure 3. Average on-state current versus ambient temperature, free air convection (rectified sine wave)** 

**Figure 4. Variation of thermal impedance junction to ambient versus pulse duration** 

DocID3768 Rev 5 

3/14 

**Characteristics** 

**TN22** 

## **Figure 5. Relative variation of gate trigger and holding current versus junction temperature** 

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

**Figure 9. Maximum allowable RMS current versus time conduction and initial case temperature** 

**Figure 6. Surge peak on-state current versus number of cycles** 

**Figure 8. On-state characteristics (maximum values)** 

**Figure 10. Maximum allowable RMS current versus time conduction and initial case temperature** 

4/14 

DocID3768 Rev 5 

**Characteristics** 

**TN22** 

## **Figure 11. Holding current versus gate-cathode resistance (typical values)** 

DocID3768 Rev 5 

5/14 

**Application information** 

**TN22** 

## **2 Application information** 

## **2.1 Overview** 

The TN22 has been designed for use as a fluorescent tube starter switch. 

As shown in _Figure 12_ , the starter circuit is divided in five parts: 

1. Rectifier bridge: to rectify mains voltage. 

2. Voltage detector: RCD circuit used to switch on the TN22. 

3. Preheating time control: RC circuit used to switch on the SCR, so turn off the TN22. 

4. Ignition circuit: made of sensitive SCR and TN22 devices. 

5. Reset control: resistor used to discharge the C2 capacitor and to reset the circuit. 

## **Figure 12. Electronic starter schematic** 

**==> picture [43 x 6] intentionally omitted <==**

**----- Start of picture text -----**<br>
Starter circuit<br>**----- End of picture text -----**<br>


**==> picture [370 x 137] intentionally omitted <==**

**----- Start of picture text -----**<br>
SWITCH INDUCTANCE IT<br>BALLAST R1<br>mains<br>D2 – D5 D6 TN22 4<br>MAINS FLUORESCENT Ignition circuit<br>VOLTAGE TUBE mains<br>SCR<br>1 + R3 3<br>C1 R2 D1<br>VS + C2 R4 Preheatingtime control<br>2 5<br>Rectifier Voltage detector Reset control<br>+<br>-<br>**----- End of picture text -----**<br>


6/14 DocID3768 Rev 5 ~~>~~ 

**TN22** 

**Application information** 

Three steps are necessary to ignite a fluorescent tube (see _Figure 13_ 

- preheating of the filament 

- ignition of the tube 

- “lighting” mode 

**Figure 13. The three operating steps of the electronic starter: preheating, ignition and lighting** 

**==> picture [182 x 144] intentionally omitted <==**

**----- Start of picture text -----**<br>
Preheating<br>eee a |<br>IT (1 A/div) Lighting<br>i <---<br>VS (500 V/div)<br>| f<br>Ignition<br>**----- End of picture text -----**<br>


## **2.2 Filament and tube preheating** 

The mains voltage is applied across the circuit and when it reaches a higher level than the zener clamping voltage (VCL), a current flows through the resistor R1 and the capacitor C1. The TN22 switches on when the voltage across its gate to cathode junction reaches the triggering gate level (VGT). 

As the TN22 is in on-state, a full sinusoidal current flows through the filaments (primary of the rectifier bridge) that are warmed up. This current is limited by the input ballast. The TN22 remains on at each current zero crossing point because the gate is still powered by the C1 capacitor. 

The preheating time duration is set with the RC circuit made of R3, R2 and C2, and according to the voltage polarization fixed by the D1 drop voltage. 

The preheating time is typically in the range of 2 to 3 seconds depending on the tube characteristics. 

DocID3768 Rev 5 

7/14 

**Application information** 

**TN22** 

## **2.3 Ignition step** 

When C2 is charged above the SCR triggering gate voltage (VGT), the SCR switches on. The voltage across the TN22 gate to cathode junction is fixed to a negative value, which allows a proper TN22 switch-off, with a high holding current (IH) level. 

When the current reaches IH, the TN22 switches off and the ballast inductor generates a high voltage pulse across the tube (see _Figure 13_ ). This over-voltage is clamped by the TN22 to a value fixed by the breakdown voltage (VBR). A 1200 V to 1500 V level is necessary to ensure a correct ignition of the fluorescent tubes. 

**Figure 14. Typical high voltage pulse of an electronic starter circuit (P0130AA SCR, TN22)** 

**==> picture [118 x 100] intentionally omitted <==**

**----- Start of picture text -----**<br>
VBR ≈ 1300 V<br>VS (200 V/div)<br>IH ≈ 225 mA<br>IT (50 mA/div)<br>ro, aae<br>**----- End of picture text -----**<br>


If the lamp is not ignited after the first pulse, the starter circuit starts a new ignition sequence. The pulse is regenerated until ignition of the tube lamp. If the lamp is not ignited after several attempts, the starter circuit can automatically stop the ignition sequence. 

**Figure 15. Repetitive ignitions sequence** 

**==> picture [124 x 105] intentionally omitted <==**

**----- Start of picture text -----**<br>
Pulse<br>a" ,<br>rat i IT(500 mA /div)<br>if | \ f\ i fh cA tA CR \\<br>AVR TUL A CHR yh A A<br>eeyyi \ { |opellf | {yd 1eegy | +ee| | J.a |<br>I 1 | | } i<br>Mains voltage<br>Bftf \ | I<br>' i} |<br>E+] i |<br>Lcd_V_MgPas Omii<br>fBURST= 50 Hz VS(500 V/div)<br>**----- End of picture text -----**<br>


## **2.4 Lighting state** 

When the lamp is ignited, the capacitor C2 is discharged through the resistors R2, R3 and R4. The voltage across the lamp remains lower than the D6 clamping voltage (VCL), avoiding the triggering of the TN22. The starter circuit remains in stand-by mode. 

8/14 

DocID3768 Rev 5 

**TN22** 

**Package information** 

## **3 Package information** 

- Epoxy meets UL94, V0 

- Lead-free packages 

- Recommended torque: 0.4 to 0.6 N·m 

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. 

## **3.1 IPAK package information** 

**Figure 16. IPAK package outline** at - _Note: This package drawing may slightly differ from the physical package. However, all the specified dimensions are guaranteed._ 

DocID3768 Rev 5 9/14 ~~wo~~ 

**Package information** 

**TN22** 

**Table 5. IPAK package mechanical data** 

||**Table 5. IPAKpackage mechanical data**|**Table 5. IPAKpackage mechanical data**|**Table 5. IPAKpackage mechanical data**|**Table 5. IPAKpackage mechanical data**|**Table 5. IPAKpackage mechanical data**|**Table 5. IPAKpackage mechanical data**|
|---|---|---|---|---|---|---|
|**Ref.**|**Dimensions**||||||
||**Millimeters**|||**Inches**|||
||**Min.**|**Typ.**|**Max.**|**Min.**|**Typ.**|**Max.**|
|A|2.20||2.40|0.086||0.094|
|A1|0.90||1.10|0.035||0.043|
|b|0.64||0.90|0.025||0.035|
|b2|||0.95|||0.037|
|b4|5.20||5.43|0.204||0.213|
|B5||0.30|||0.012||
|c|0.45||0.60|0.017||0.023|
|c2|0.46||0.60|0.018||0.023|
|D|6||6.20|0.236||0.244|
|E|6.40||6.65|0.252||0.2618|
|e||2.28|||0.090||
|e1|4.40||4.60|0.173||0.181|
|H||16.10|||0.634||
|L|9||9.60|0.354||0.377|
|L1|0.8||1.20|0.031||0.047|
|L2||0.80|1.25||0.031|0.049|
|V1||10°|||10°||



10/14 

DocID3768 Rev 5 

**TN22** 

**Package information** 

## **3.2 TO-220AB package information** 

## **Figure 17. TO-220AB package outline** 

**==> picture [310 x 333] intentionally omitted <==**

**----- Start of picture text -----**<br>
H2 A<br>Dia C<br>L5<br>L7<br>L6<br>L2<br>F2<br>D<br>F1 L9<br>L4<br>F<br>M<br>G1<br>E<br>G<br>**----- End of picture text -----**<br>


DocID3768 Rev 5 

11/14 

**Package information** 

**TN22** 

**Table 6. TO-220AB package mechanical data** 

||**Table 6. TO-220ABpackage mechanical data**|**Table 6. TO-220ABpackage mechanical data**|**Table 6. TO-220ABpackage mechanical data**|**Table 6. TO-220ABpackage mechanical data**|
|---|---|---|---|---|
|**Ref.**|**Dimensions**||||
||**Millimeters**||**Inches**||
||**Min.**|**Max.**|**Min.**|**Max.**|
|A|4.40|4.60|0.17|0.18|
|b|0.61|0.88|0.024|0.035|
|b1|1.14|1.70|0.045|0.067|
|c|0.48|0.70|0.019|0.027|
|D|15.25|15.75|0.60|0.62|
|D1|1.27 typ.||0.05 typ.||
|E|10|10.40|0.39|0.41|
|e|2.40|2.70|0.094|0.106|
|e1|4.95|5.15|0.19|0.20|
|F|1.23|1.32|0.048|0.052|
|H1|6.20|6.60|0.24|0.26|
|J1|2.40|2.72|0.094|0.107|
|L|13|14|0.51|0.55|
|L1|3.50|3.93|0.137|0.154|
|L20|16.40 typ.||0.64 typ.||
|L30|28.90 typ.||1.13 typ.||
|P|3.75|3.85|0.147|0.151|
|Q|2.65|2.95|0.104|0.116|



12/14 

DocID3768 Rev 5 

**Ordering information** 

**TN22** 

## **4 Ordering information** 

## **Figure 18. Ordering information scheme** 

**Table 7. Ordering information** 

|**Order code**|**Marking**|**Package**|**Weight**|**Base qty**|**Delivery mode**|
|---|---|---|---|---|---|
|TN22-1500H|TN22-1500|IPAK|0.4 g|75|Tube|
|TN22-1500T|TN22-1500|TO-220AB|2.0 g|50|Tube|



## **5 Revision history** 

**Table 8. Document revision history** 

|**Date**|**Revision**|**Changes**|
|---|---|---|
|Oct-2000|1|First release.|
|17-Sep-2005|2|TO-220AB package added.|
|13-Aug-2009|3|Updated Figure 14. Added Figure 19 and Figure 20.|
|03-Jun-2014|4|Update IPAK package information and reformatted to<br>current standard.|
|18-Jan-2016|5|Format updated to current standard.<br>Updated cover page.<br>Updated_Figure 7_,_Figure 16_and_Figure 18_.<br>Updated_Table 1_and_Table 7_.|



DocID3768 Rev 5 

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**TN22** 

## **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. 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. 

© 2016 STMicroelectronics – All rights reserved 

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DocID3768 Rev 5 



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- [Supplier page](https://es.farnell.com/stmicroelectronics/tn22-1500t/startlight-to-220ab/dp/1748964)
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