# TVS Diode, Transil STIEC45, Unidirectional, 30 V, 55 V, DO-214AB (SMC), 2 Pins

![Product image](https://novapart.co/image/farnell:1889338/)

**URL**: https://novapart.co/products/STIEC45-30AS/tvs-diode-transil-stiec45-unidirectional-30-v-55
**SKU**: STIEC45-30AS
**Manufacturer**: STMICROELECTRONICS
**Category**: Circuit Protection || TVS - Transient Voltage Suppressors || TVS Diodes
**Price**: €1.0600
**Stock**: 1000+
**Lead Time**: 127 days (indicative)

## Description

Product Range:Transil STIEC45 Series; TVS Polarity:Unidirectional; Reverse Stand-Off Voltage Vrwm:30V; Clamping Voltage Vc Max:55V; Diode Case Style:DO-214AB; No. of Pins:2Pins; Brea

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2025) |
| No. Of Pins | 2Pins |
| Tvs Polarity | Unidirectional |
| Product Range | Transil STIEC45 |
| Qualification | - |
| Diode Mounting | Surface Mount |
| Diode Case Style | DO-214AB (SMC) |
| Clamping Voltage Max | 55V |
| Reverse Standoff Voltage | 30V |
| Maximum Breakdown Voltage | 36.8V |
| Minimum Breakdown Voltage | 33.3V |
| Operating Temperature Max | 150°C |
| Peak Pulse Power Dissipation | - |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:1889338/)

## **STIEC45-xxAS, STIEC45-xxACS** 

## Transil™ TVS for IEC 61000-4-5 compliance 

Datasheet - production data 

- MIL STD 883G, method 3015-7 Class 3B  25 kV HBM (human body model) 

- Resin meets UL 94, V0 

- MIL-STD-750, method 2026 solderability 

- EIA-481 and IEC 60286-3 packing 

- IPC 7531 footprint 

## **Description** 

## **Features** 

- Peak pulse current: 500 A (1.2/50 μs, 8/20 μs) 

- Stand-off voltage range: from 24 V to 33 V 

- Unidirectional types: STIEC45-xxAS 

      - Reverse: Clamping starts at VBR 

   - 

   - Forward: Clamping starts around 0.6 V 

- Bidirectional types: STIEC45-xxACS 

   - Clamping starts at VBR on both directions 

- Low leakage current 

   - 0.2 μA at 25 °C 

   - 1 μA at 85 °C 

- Operating Tj max: 150 °C 

- High peak current capability at Tj max: 410 A, 8/20 μs 

- JEDEC registered package outline 

- RoHS2 compliant 

## **Complies with the following standards** 

- IEC 61000-4-2 level 4 

   - 15 kV (air discharge) 

The STIEC45 Transil series has been designed to protect DC power supply lines according to IEC 61000-4-5. This device protects circuits against electrical fast transients (EFT) according to IEC 61000-4-4 and ETS EN 300 386. Protection against electrostatic discharges is provided according to IEC 61000-4-2 and MIL STD 883 Method 3015. 

Planar technology makes these devices suitable for high-end equipment and SMPS where low leakage current and high junction temperature are required to provide reliability and stability over time. 

The STIEC45 device is packaged in SMC (SMC footprint in accordance with IPC 7351 standard). 

Transil is a trademark of STMicroelectronics 

**Table 1: Device summary** 

|**Order codes**<br>**unidirectional**|**VRM**<br>**(V)**|**Order codes**<br>**bidirectional**|
|---|---|---|
|STIEC45-24AS|24|STIEC45-24ACS|
|STIEC45-26AS|26|STIEC45-26ACS|
|STIEC45-28AS|28|STIEC45-28ACS|
|STIEC45-30AS|30|STIEC45-30ACS|
|STIEC45-33AS|33|STIEC45-33ACS|



   - 8 kV (contact discharge) 

- IEC 61000-4-5 

   - Level 4: 4 kV with R = 12 Ω (334 A) common mode 

   - Level 2: 1 kV with R = 2 Ω (500 A) differential mode 

**==> picture [75 x 8] intentionally omitted <==**

This is information on a product in full production. 

_www.st.com_ 

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**Characteristics** 

**STIEC45-xxAS, STIEC45-xxACS** 

## **1 Characteristics** 

**Table 2: Absolute maximum ratings (limiting values at Tamb = 25 °C unless otherwise specified)** 

|**Parameter**|**Parameter**|**Value**|**Unit**|
|---|---|---|---|
|Peak pulse current (8/20 μs)|Tjinitial = Tamb|500|A|
|Storage temperature range||-65 to +150|°C|
|Operating junction temperature range||-55 to +150|°C|
|Maximum lead temperature for soldering during 10 s.||260|°C|



**Table 3: Thermal resistances** 

|**Symbol**|**Parameter**|**Value**|**Unit**|
|---|---|---|---|
|Rth(j-l)<br>Rth(j-a)|Junction to leads|15|°C/W|
||Junction to ambient on printed circuit on recommended pad layout|90|°C/W|



**Figure 1: Electrical characteristics (definitions)** 

**==> picture [482 x 156] intentionally omitted <==**

**----- Start of picture text -----**<br>
I I<br>SymbolVRM Stand-offParametervoltage Unidirectional IF IPP<br>VBR Breakdown voltage at IR<br>VIRMCL Clamping voltageLeakage current at VRM VCLVBR VRM VF V VCLVBR VRM IIRMR V<br>IαPPT Voltage temperature coefficientPeak pulse current IRMIR IRMIR VRMVBR VCL<br>VF Forward voltage drop at IF<br>RD Dynamic resistance IPP IPP Bidirectional<br>**----- End of picture text -----**<br>


**Table 4: Electrical characteristics (Tamb = 25 °C)** 

|**Order code**|**IRM at VRM**|**IRM at VRM**||||||**VCL at IPP****_(2)_ 1.2/50**<br>**µs - 8/20 μs**|**VCL at IPP****_(2)_ 1.2/50**<br>**µs - 8/20 μs**|**RD****_(3)_**<br>**8/20 μs**|**αT****_(4)_**|
|---|---|---|---|---|---|---|---|---|---|---|---|
||||||**VBR at IR****_(1)_**|||||||
|||||||||||||
||**25 °C**|**85 °C**||**Min.**|**Typ.**|**Max.**||**Max.**||**Typ.**|**Max.**|
||**μA**||**V**||**V**||**mA**|**V**|**A**|**Ω**|**10-4/ °C**|
|STIEC45-24AS/ACS|0.2|1|24|26.7|28.2|29.5|1|42|500|0.025|9.6|
|STIEC45-26AS/ACS|0.2|1|26|28.9|30.3|31.9|1|45|500|0.026|9.7|
|STIEC45-28AS/ACS|0.2|1|28|31.1|32.6|34.3|1|49|500|0.029|9.8|
|STIEC45-30AS/ACS|0.2|1|30|33.3|35|36.8|1|55|500|0.036|9.9|
|STIEC45-33AS/ACS|0.2|1|33|36.7|38.6|40.6|1|59|500|0.036|10|



## **Notes:** 

(1)Pulse test : tp < 50 ms. 

(2)Surge capability given for both directions (unidirectional and bidirectional types). 

(3)To calculate maximum clamping voltage at other surge levels: VCLmax = RD x IPP + VBRmax 

(4)To calculate VBR versus junction temperature: VBR at Tj = VBR at 25 °C x (1 + αT x (Tj – 25)) 

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**Characteristics** 

## **1.1 Characteristics (curves)** 

**==> picture [485 x 163] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 3: Peak pulse current versus initial junction<br>Figure 2: Pulse form<br>temperature<br>% Ipp 600 IPP(A)<br>Repetitive pulse current a 1.2/50 µs - 8/20 µs<br>100 a tr = rise time (µs)tp = pulse duration time (µs) 500 PEPE iR4<br>400 e e<br>| a<br>50 >| 300 aa<br>boI 200 aa<br>| 100 COPE eee<br>0 1 t a<br>tr tp 0 e e T(°C)j<br>25 50 75 100 125 150 175<br>**----- End of picture text -----**<br>


**Figure 4: Clamping voltage at 500 A (1.2/50 μs - 8/20 μs)** 

**==> picture [416 x 211] intentionally omitted <==**

**----- Start of picture text -----**<br>
Surge current 100 A/div Remaining voltage - STIEC45-24AS / ACS 10 V/div<br>5 µs/div 5 µs/div<br>Remaining voltage - STIEC45-26AS / ACS 10 V/div Remaining voltage - STIEC45-28AS / ACS 10 V/div<br>5 µs/div 5 µs/div<br>Remaining voltage - STIEC45-30AS / ACS 10 V/div Remaining voltage - STIEC45-33AS / ACS 10 V/div<br>5 µs/div 5 µs/div<br>**----- End of picture text -----**<br>


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**Characteristics** 

**STIEC45-xxAS, STIEC45-xxACS** 

**==> picture [462 x 372] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 5: Junction capacitance versus reverse  Figure 6: Junction capacitance versus reverse<br>applied voltage (unidirectional devices)  applied voltage (bidirectional devices)<br>C(pF)<br>10000 10000<br>F=1 MHz F=1MHz<br>VoscT=30 mV j =25 °CRMS V osc T=30mV j =25°C RMS<br>STIEC45-24AS<br>STIEC45-24ACS<br>1000 STIEC45-33AS - 1000 STIEC45-33ACS<br>VR(V) VR(V)<br>100 100<br>1 10 100 1 10 100<br>Figure 7: Peak forward voltage drop versus peak  Figure 8: Leakage current versus junction<br>forward current (unidirectional devices)  temperature<br>IFM(A) 1.E+03 IR(nA)<br>1.E+03<br>VR=VRM<br>1.E+02<br>1.E+02<br>1.E+01<br>T = 25 °Cj<br>1.E+00<br>T = 150 °Cj 1.E+01<br>1.E-01<br>1.E-02 VFM(V) 1.E+00 Tj(°C)<br>0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 25 50 75 100 125 150<br>C(pF)<br>**----- End of picture text -----**<br>


**==> picture [451 x 177] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 9: Relative variation of thermal impedance,  Figure 10: Thermal resistance junction to ambient<br>junction to ambient, versus pulse duration  versus copper surface under each lead<br>1.0Zth(j-a) / Rth(j-a) 100 Rth(j-a)(°C/W)<br>0.9 RecommendedPCB FR4,copperpadthicknesslayout = 35 µm 90 PCB FR4,copper thickness = 35 µm<br>0.8 80<br>0.7 70<br>0.6 60<br>0.5 50<br>0.4 40<br>0.3 30<br>Single pulse<br>0.2 20<br>0.1 10<br>0.0 tP(s) 0 SCU(cm²)<br>1.E-01 1.E+00 1.E+01 1.E+02 1.E+03 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0<br>**----- End of picture text -----**<br>


**Figure 9: Relative variation of thermal impedance, junction to ambient, versus pulse duration** 

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**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 SMC package information** 

**Figure 11: SMC package outline** 

**Table 5: SMC package mechanical data** 

|**Ref.**<br>~~es~~|**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|
|---|---|---|---|---|
||**Millimeters**||**Inches**||
||**Min.**|**Max.**|**Min.**|**Max.**|
|A1<br>~~es~~<br>~~ee~~|1.90<br>~~ts ee~~|2.45<br>~~ts ee~~|0.075|0.096|
|A2<br>~~es~~<br>~~ee~~<br>~~es~~|0.05<br>~~ts ee~~<br>~~ee~~|0.20<br>~~ts ee~~<br>~~es~~|0.002|0.008|
|b<br>~~ee~~<br>~~es~~<br>~~ee ey~~|2.90<br>~~ts ee~~<br>~~ee~~<br>~~ey ns~~|3.20<br>~~ts ee~~<br>~~es~~<br>~~ns~~|0.114|0.126|
|c<br>~~es ~~<br>~~ee ey~~<br>~~ee es~~|0.15<br> ~~ee~~<br>~~ey ns~~<br>~~es ns~~|0.40<br>~~es~~<br>~~ns~~<br>~~ns~~|0.006|0.016|
|D<br>~~ee ey~~<br>~~ee es~~<br>~~es~~|5.55<br>~~ey ns~~<br>~~es ns~~|6.25<br>~~ns~~<br>~~ns~~|0.218|0.246|
|E<br>~~ee es~~<br>~~es~~<br>~~ee~~|7.75<br>~~es ns~~<br>~~ts ee~~|8.15<br>~~ns~~<br>~~ee~~|0.305|0.321|
|E1<br>~~es~~<br>~~ee~~<br>~~es~~|6.60<br>~~ts ee~~<br>~~et~~|7.15<br>~~ee~~|0.260|0.281|
|E2<br>~~ee~~<br>~~es~~|4.40<br>~~ts ee~~<br>~~et~~|4.70<br>~~ee~~<br>~~ns~~|0.173|0.185|
|L<br>~~es~~<br>~~es~~|0.75<br>~~et~~<br>~~es~~|1.50<br>~~es~~<br>~~ns~~|0.030<br>~~es~~|0.060<br>~~es~~|



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**Package** information 

## **Figure 12: Footprint recommendation, dimensions in mm (inches)** 

**Figure 14: Package orientation in reel** 

## **Figure 13: Marking layout** 

**Figure 15: Tape and reel orientation** 

**==> picture [166 x 43] intentionally omitted <==**

**----- Start of picture text -----**<br>
Taped according to EIA-481<br>Note: Pocket dimensions are not on scale<br>Pocket shape may vary depending on package<br>On bidirectional devices, marking and logo may<br>be not always in the same direction<br>**----- End of picture text -----**<br>


**Figure 16: 13’’reel dimensions (mm)** 

**==> picture [173 x 106] intentionally omitted <==**

**----- Start of picture text -----**<br>
Ø 330 max 22.4<br>2± 0.5<br>Ø 13<br>\ /<br>SRY<br>Ø 100 Ø 20.2 min<br>**----- End of picture text -----**<br>


**==> picture [167 x 138] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 17: Inner box dimensions (mm)<br>40<br>350<br>350<br>**----- End of picture text -----**<br>


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**Package** information 

## **Figure 18: Tape and reel outline** 

**Table 6: Tape and reel mechanical data** 

|**Ref.**|**Dimensions**|**Dimensions**|**Dimensions**|
|---|---|---|---|
||**Millimeters**|||
||**Min.**|**Typ.**|**Max.**|
|Ø D0|1.4|1.5|1.6|
|Ø D1|1.5|-|-|
|F|7.4|7.5|7.6|
|K0|2.39|2.49|2.59|
|P0|3.9|4.0|4.1|
|P1|7.9|8|8.1|
|P2|1.9|2|2.1|
|W|15.7|16|16.3|



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**STIEC45-xxAS, STIEC45-xxACS** 

**Package** information 

**Figure 19: ST ECOPACK® recommended soldering reflow profile for PCB mounting** 

Minimize air convection currents in the reflow oven to avoid component movement. Maximum soldering profile corresponds to the latest IPC/JEDEC J- STD-020. 

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**Ordering** information 

**STIEC45-xxAS, STIEC45-xxACS** 

## **3 Ordering information** 

**==> picture [410 x 299] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 20: Ordering information scheme<br>STIEC45 - xx A/AC S<br>IEC 61000-4-5<br>Stand off voltage<br>Current capability code and type<br>A = 500 A, 1.2/50 µs, 8/20 µs, unidirectional<br>AC = 500 A, 1.2/50 µs, 8/20 µs, bidirectional<br>Package<br>S = SMC package ( Jedec DO-214AB)<br>**----- End of picture text -----**<br>


**==> picture [416 x 184] intentionally omitted <==**

**----- Start of picture text -----**<br>
Table 7: Ordering information<br>Order code  Marking  Package  Weight  Base qty.  Delivery mode<br>STIEC45-24AS  4524A<br>STIEC45-26AS  4526A<br>STIEC45-28AS  4528A<br>STIEC45-30AS  4530A<br>STIEC45-33AS  4533A<br>SMC  0.25 g  2500  Tape and reel<br>STIEC45-24ACS  4524C<br>STIEC45-26ACS  4526C<br>STIEC45-28ACS  4528C<br>STIEC4530ACS  4530C<br>STIEC45-33ACS  4533C<br>**----- End of picture text -----**<br>


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**STIEC45-xxAS, STIEC45-xxACS** 

**Revision** history 

## **4 Revision history** 

**Table 8: Document revision history** 

|**Date**|**Revision**|**Changes**|
|---|---|---|
|07-Dec-2017|1|First issue|
|11-Jan-2017|2|Added bidirectional types and updated stand-off voltage range from 24 V<br>to 68 V.|
|13-Nov-2017|3|Updated SMC package information. Updated VRMrange from 24 V to 33 V.|



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## **STIEC45-xxAS, STIEC45-xxACS** 

## **5 Disclaimer** 

## **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. 

- © 2017 STMicroelectronics – All rights reserved 

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## Links

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- [Supplier page](https://es.farnell.com/stmicroelectronics/stiec45-30as/diode-tvs-un-30v-450w-500a-smc/dp/1889338)
---

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