# TVS Diode, LDP01-xxAY Transil, Unidirectional, 36 V, 71 V, TO-263 (D2PAK), 3 Pins

![Product image](https://novapart.co/image/farnell:3132446/)

**URL**: https://novapart.co/products/LDP01-42AY/tvs-diode-ldp01-xxay-transil-unidirectional-36-v
**SKU**: LDP01-42AY
**Manufacturer**: STMICROELECTRONICS
**Category**: Circuit Protection || TVS - Transient Voltage Suppressors || TVS Diodes
**Price**: €1.0400
**Stock**: 10+
**Lead Time**: 127 days (indicative)

## Description

Product Range:LDP01-xxAY Transil Series; TVS Polarity:Unidirectional; Reverse Stand-Off Voltage Vrwm:36V; Clamping Voltage Vc Max:71V; Diode Case Style:TO-263; No. of Pins:3Pins; Breakdown

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2025) |
| No. Of Pins | 3Pins |
| Tvs Polarity | Unidirectional |
| Product Range | LDP01-xxAY Transil |
| Qualification | AEC-Q101 |
| Diode Mounting | Surface Mount |
| Diode Case Style | TO-263 (D2PAK) |
| Clamping Voltage Max | 71V |
| Reverse Standoff Voltage | 36V |
| Maximum Breakdown Voltage | 44.2V |
| Minimum Breakdown Voltage | 40V |
| Operating Temperature Max | 175°C |
| Peak Pulse Power Dissipation | - |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3132446/)

## **LDP01-xxAY** 

## Automotive TVS for load dump protection 

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

## **Description** 

The LDP01-xxAY Transil™ series have been designed to protect automotive sensitive circuits against surges defined in ISO 7637-2 and ISO 16750 tests A and B also called load-dump. 

The planar technology makes it compatible with high-end circuits where low leakage current and high junction temperature are required to provide reliability and stability over time. 

LDP01-xxAY is packaged in D²PAK. 

## **Features** 

- Stand-off voltage range: from 22 to 70 V 

- Low leakage current: 1 μA at 25 °C 

- Operating Tj max: 175 °C 

- High power capability at Tj max 

- JEDEC registered package outline 

- ROHS and Halogen free 

- Resin meets UL 94, V0 

- AEC-Q101 compliant 

## **Complies with the following standards:** 

- IEC 61000-4-2 exceeds level 4 

   - 30 kV (air discharge) 

      - 30 kV (contact discharge) 

   - 

- ISO10605 – C = 330 pF, R = 330 Ω 

   - 30 kV (air discharge) 

   - 30 kV (contact discharge) 

- ISO 7637-2 

   - Pulse 1: VS = -150 V 

   - Pulse 2a: VS = +112 V 

**Table 1. Device summary** 

|**Part number**|**Breakdown voltage**<br>**(VBR at IR = 1 mA)**|**Breakdown voltage**<br>**(VBR at IR = 1 mA)**|**Breakdown voltage**<br>**(VBR at IR = 1 mA)**|
|---|---|---|---|
||**min.**|**typ.**|**max.**|
||**V**|||
|LDP01-26AY<br>~~es~~|24.4<br>~~es~~<br>~~ee~~<br>~~ee~~|26<br>~~es~~<br>~~ee~~<br>~~ee~~|27.0<br>~~es~~<br>~~ee~~<br>~~ee~~|
|LDP01-28AY<br>~~ee~~|26.7<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|28<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|29.5<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|
|LDP01-30AY<br>~~ee~~|28.9<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|30<br> ~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|31.9<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|
|LDP01-33AY<br>~~ee~~|31.1<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|33<br> ~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|34.3<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|
|LDP01-35AY<br>~~ee~~|33.3<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|35<br> ~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|36.9<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|
|LDP01-39AY<br>~~ee~~|36.7<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|39<br> ~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|40.5<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|
|LDP01-42AY<br>~~ee~~|40<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|42<br> ~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|44.2<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|
|LDP01-47AY<br>~~ee~~|44.4<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|47<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|49<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|
|LDP01-50AY<br>~~ee~~|47.8<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|50<br> ~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|52.8<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|
|LDP01-56AY<br>~~ee~~|53.3<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|56<br> ~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|58.9<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|
|LDP01-68AY<br>~~ee~~|64.4<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|68<br> ~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|71.2<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|
|LDP01-82AY<br>~~ee~~|77.8<br>~~ee ~~<br>~~ee~~<br>~~ee~~|82<br> ~~ee ~~<br>~~ee~~<br>~~ee~~|86<br> ~~ee~~<br>~~ee~~<br>~~ee~~|



   - Pulse 3a: Vs = -220 V 

   - Pulse 3b: Vs = +150 V 

   - Formerly pulses 5a and 5b 

- ISO 16750-2 

   - Tests A and B 

October 2015 

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This is information on a product in full production. 

_www.st.com_ 

**Characteristics** 

**LDP01-xxAY** 

## **1 Characteristics** 

**Table 2. Absolute maximum ratings (Tamb = 25 °C)** 

|**Symbol**|**Parameter**|**Parameter**|**Parameter**|**Value**|**Unit**|
|---|---|---|---|---|---|
|VPP|Peak pulse voltage|ISO 10605 (C = 330 pF, R = 330Ω)<br>– contact discharge<br>– air discharge<br>IEC 61000-4-2<br>– contact discharge<br>– air discharge||30<br>30<br>30<br>30|kV|
|Tstg|Storage temperature range|||-65 to + 175|°C|
|Tj|Operating junction temperature range|||-55 to + 175|°C|
|TL|Maximum lead temperature for soldering during 10 s|||260|°C|
|**Table 3. Thermalparameter**||||||
|**Symbol**|**Parameter**||**Maximum**||**Unit**|
|Rth(j-c)|Junction to case|D2PAK|0.24||°C/W|



## **Figure 1. Electrical characteristics (definitions)** 

**==> picture [405 x 340] intentionally omitted <==**

**----- Start of picture text -----**<br>
I<br>IF<br>Symbol Parameter<br>VBR = Breakdown voltage<br>VCL = Clamping voltage VF<br>IRM = Leakage current at VRM VCLVBR VRM V<br>VRM = Stand-off voltage IRM<br>IPP = Peak pulse current<br>VF = Forward voltage drop<br>Rd = Dynamic impedance Slope: 1/Rd<br>�T = Voltage temperature IPP<br>Figure 2. Pulse definition for electrical characteristics<br>% I<br>PP<br>100<br>Pulse waveform<br>tr = rise (µs)<br>tp = pulse duration time (µs)<br>50<br>0<br>t<br>tr tp<br>**----- End of picture text -----**<br>


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**Characteristics** 

**LDP01-xxAY** 

**Table 4. Electrical characteristics (parameter)** 

|**Order code**|**IRM max. at VRM**|**IRM max. at VRM**|**IRM max. at VRM**|**VBR at IR**<br>**(1)**|**VBR at IR**<br>**(1)**|**VBR at IR**<br>**(1)**|**VBR at IR**<br>**(1)**|**VCL at IPP**<br>**10/1000 µs**|**VCL at IPP**<br>**10/1000 µs**|**RD**<br>**(2)**<br>**10/1000**<br>**µs**|**VCL at IPP**<br>**8/20 µs**|**VCL at IPP**<br>**8/20 µs**|**RD**<br>**(2)**<br>**8/20 µs**|⍺**T(3)**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
||**25 °C **|**175 °C**||**min.**|**typ. **|**max.**||**max.**|||**max.**|||**max.**|
||**µA**||**V**|**V**|||**mA**|**V**|**A**|**m**Ω|**V**|**A**|**m**Ω|**10-4/°C**|
|LDP01-26AY|1|100|22|24.4|26|27.0|1|36|140|64|42|1400|11|9.6|
|LDP01-28AY|1|100|24|26.7|28|29.5|1|40|120|88|45|1250|12|9.7|
|LDP01-30AY|1|100|27|28.9|30|31.9|1|40|125|65|49|1400|12|9.7|
|LDP01-33AY|1|100|28|31.1|33|34.3|1|43.5|110|75|56|1250|17|9.8|
|LDP01-35AY|1|100|30|33.3|35|36.9|1|45.5|95|91|60|1150|20|9.9|
|LDP01-39AY|1|100|33|36.7|39|40.5|1|51.5|85|129|66|1050|24|10|
|LDP01-42AY|1|100|36|40|42|44.2|1|57|77|166|71|1000|27|10|
|LDP01-47AY|1|100|40|44.4|47|49|1|63|65|215|76.5|950|29|10.1|
|LDP01-50AY|1|100|43|47.8|50|52.8|1|68|55|276|81|900|31|10.2|
|LDP01-56AY|1|100|48|53.3|56|58.9|1|76|48|356|90|770|40|10.3|
|LDP01-68AY|1|100|58|64.4|68|71.2|1|92|42|495|110|620|63|10.4|
|LDP01-82AY|1|100|70|77.8|82|86|1|113|35|771|135|550|89|10.5|



1. Pulse test: tP < 50 ms 

2. To calculate maximum clamping voltage at other surge level, use the following formula: VCLmax = RD x IPP + VBRmax 

3. To calculate VBR or VCL versus junction temperature, use the following formulas: 

VBR at Tj = VBR at 25 °C x (1 + ⍺ T x (Tj - 25)) 

VCL at Tj = VCL at 25 °C x (1 + ⍺ T x (Tj - 25)) 

**Figure 3. Peak pulse power dissipation versus Figure 4. Peak pulse power versus exponential initial junction temperature (LDP01-30AY) pulse duration (LDP01-30AY)** 

**==> picture [462 x 146] intentionally omitted <==**

**----- Start of picture text -----**<br>
6 P PP (kW) 10/1000 µs 1000 PPP (kW) TLDP01-30AYJ initial TLDP01-30AYJ initial = 25= 25�C°C<br>5<br>100<br>4<br>3 10<br>2<br>1<br>1<br>0 Tj(°C ) 0.1 tp (ms)<br>0 25 50 75 100 125 150 175 200 0.01 0.1 1 10 100<br>**----- End of picture text -----**<br>


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**Characteristics** 

**LDP01-xxAY** 

**Figure 5. ISO7637-2, pulse 5a definition** 

**Figure 6. Load dump capability (LDP01-30AY Us = f(Ri) pulse 5a)** 

**==> picture [462 x 328] intentionally omitted <==**

**----- Start of picture text -----**<br>
td<br>13.5+30 13.5+35 13.5+40 13.5+45 13.5+50 13.5+55 13.5+60 13.5+65 [13.5+70] [13.5+75]<br>0.5<br>13.5 V + Us (V)<br>0.6<br>0.7<br>Us<br>0.8<br>0.9<br>1<br>1.1<br>1.2<br>10% 1.3<br>13.5 V 1.4<br>Battery voltage t 1.5<br>Figure 7. ISO7637-2, pulse 5b definition Figure 8. Load dump capability (LDP01-30AY<br>Us* = f(Ri) pulse 5b, Us = 87 V)<br>td<br>Us 13.5+20 13.5+25 13.5+30 13.5+35 13.5+40 13.5+45 13.5+50 13.5+55 [13.5+60] [13.5+65]<br>0.5<br>13.5 V + Us* (V)<br>0.6<br>0.7<br>0.8<br>0.9<br>1<br>1.1<br>Us* 1.2<br>10% 1.3<br>13.5 V 1.4<br>Battery voltage t 1.5<br>0<br>td = 400 mstd = 300 mstd = 150 ms<br>td = 150ms<br>td = 400mstd = 300ms<br>Serial resistance (<br>Ω)<br>Serial resistance (<br>**----- End of picture text -----**<br>


**Figure 9. ISO 16750-2, test A definition** 

**Figure 10. Load dump capability (LDP01-30AY Us = f(Ri), Test A)** 

**==> picture [462 x 146] intentionally omitted <==**

**----- Start of picture text -----**<br>
td<br>30 35 40 45 50 55 60 65 70 75 80 85 90<br>0.5<br>Us<br>Us (V)<br>0.6<br>0.7<br>0.8<br>0.9<br>1<br>1.1<br>1.2<br>0.1 (Us – UA) 1.3<br>UA 1.4<br>Battery voltage t<br>1.5<br>0<br>td = 150 ms<br>td = 300 ms<br>td = 400 ms<br>Serial resistance (<br>**----- End of picture text -----**<br>


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**Characteristics** 

**LDP01-xxAY** 

**Figure 11. ISO 16750-2, test B definition** 

**Figure 12. Load dump capability (LDP01-30AY Us* = f(Ri) Test B, Us = 87 V)** 

**==> picture [454 x 128] intentionally omitted <==**

**----- Start of picture text -----**<br>
td<br>30 35 40 45 50 55 60 65 70 75 80<br>Us 0.5<br>Us* (V)<br>0.6<br>hy 0.7<br>eo ' 0.8<br>Us* 0.9<br>1<br>1.1<br>1.2<br>10% 1.3<br>UA 1.4<br>Battery voltage t 1.5<br>td = 150 ms<br>td = 300 ms<br>td = 400 ms<br>Ω)<br>Serial resistance (<br>**----- End of picture text -----**<br>


**Figure 13. Clamping voltage versus peak pulse current (maximum values)** 

**Figure 14. ISO 16750-2 test B response (UA + Us* = 13.5 + 30 V, Us = 87 V, td = 400 ms, Ri = 0.5** Ω **)** 

**==> picture [183 x 84] intentionally omitted <==**

**----- Start of picture text -----**<br>
37.2 V<br>16.9 A VCL (5 V/div)<br>. PPP (200 W/div)IPP (5 A/div)<br>547 W 50 ms/div<br>**----- End of picture text -----**<br>


**Figure 15. Peak forward voltage versus peak forward current (typical values)** 

**==> picture [193 x 138] intentionally omitted <==**

**----- Start of picture text -----**<br>
IFM(A)<br>100.0<br>10.0 HO<br>1.0<br>LDP01-30AY<br>Tj initial = 25 °C<br>Tj initial = 175 °CPulse duration 2 ms VFM(V)<br>0.1<br>0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2<br>**----- End of picture text -----**<br>


**Figure 16. Leakage current versus junction temperature (typical values)** 

**==> picture [191 x 130] intentionally omitted <==**

**----- Start of picture text -----**<br>
IR(nA)<br>10000<br>VR = VRM<br>1000<br>100<br>10<br>Tj(°C)<br>1<br>25 50 75 100 125 150 175<br>**----- End of picture text -----**<br>


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**Characteristics** 

**LDP01-xxAY** 

**Figure 17. Relative variation of thermal impedance junction to case versus pulse duration** 

**==> picture [211 x 136] intentionally omitted <==**

**----- Start of picture text -----**<br>
Zth(j-c)( °C/W)<br>0.25<br>0.2<br>0.15<br>Both anodes connected<br>0.1<br>0.05<br>t p (s)<br>0<br>1.E-05 1.E-04 1.E-03 1.E-02 1.E-01 1.E+00<br>**----- End of picture text -----**<br>


More information available in _AN2689_ on www.st.com: Protection of automotive electronics from electrical hazards, guidelines for design and component selection. 

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**LDP01-xxAY** 

**Package information** 

## **2 Package information** 

- Epoxy meets UL94, V0 

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. 

## **Figure 18. D[2] PAK dimension definitions** 

**==> picture [253 x 312] intentionally omitted <==**

**----- Start of picture text -----**<br>
A<br>E<br>C2<br>L2<br>D<br>L<br>L3<br>A1<br>B2<br>C R<br>B<br>G<br>A2<br>M<br>*<br>V2<br>* F lat zone no less than 2mm<br>**----- End of picture text -----**<br>


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**Package information** 

**LDP01-xxAY** 

**Table 5. D[2] PAK dimension values** 

||**Table 5. D2PAK dimension values**|**Table 5. D2PAK dimension values**|**Table 5. D2PAK dimension values**|**Table 5. D2PAK dimension values**|**Table 5. D2PAK dimension values**|**Table 5. D2PAK dimension values**|**Table 5. D2PAK dimension values**|**Table 5. D2PAK dimension values**|
|---|---|---|---|---|---|---|---|---|
|**Ref.**|**Dimensions**||||||||
||**Millimeters**||||||**Inches**||
||**Min.**||||**Max.**||**Min.**|**Max.**|
|A|4.40||||4.60||0.173|0.181|
|A1|2.49||||2.69||0.098|0.106|
|A2|0.03||||0.23||0.001|0.009|
|B|0.70||||0.93||0.027|0.037|
|B2|1.14||||1.70||0.045|0.067|
|C|0.45||||0.60||0.017|0.024|
|C2|1.23||||1.36||0.048|0.054|
|D|8.95||||9.35||0.352|0.368|
|E|10.00||||10.40||0.393|0.409|
|G|4.88||||5.28||0.192|0.208|
|L|15.00||||15.85||0.590|0.624|
|L2|1.27||||1.40||0.050|0.055|
|L3|1.30||||1.75||0.051|0.069|
|M|2.29||||2.79||0.090|0.110|
|R|0.40 typ.||||||0.016 typ.||
|V2|0°||||8°||0°|8°|
||**Figure 19. Footprint(dimensions in mm)**||||||||
||**12.2**||||||||
|||||**16.90**|||||
||||||||||
||||||||||
||||||||||
||||||||||
|||||**9.75**|||||
||||||||||
||||||||||
||||||||||



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**Package information** 

**==> picture [405 x 258] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 20. Marking<br>�<br>xxxx XXXX : Marking<br>Z : Manufacturing location<br>xxxx<br>Y : Year<br>z y w w WW : week<br>**----- End of picture text -----**<br>


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**Ordering information** 

**LDP01-xxAY** 

## **3 Ordering information** 

**Table 6. Ordering information** 

|**Order code**|**Marking**|**Package**|**Weight**|**Base qty**|**Delivery mode**|
|---|---|---|---|---|---|
|LDP01-26AY|LDP01-26AY|D²PAK|1.38 g|1000|Tape and reel|
|LDP01-28AY|LDP01-28AY|||||
|LDP01-30AY|LDP01-30AY|||||
|LDP01-33AY|LDP01-33AY|||||
|LDP01-35AY|LDP01-35AY|||||
|LDP01-39AY|LDP01-39AY|||||
|LDP01-42AY|LDP01-42AY|||||
|LDP01-47AY|LDP01-47AY|||||
|LDP01-50AY|LDP01-50AY|||||
|LDP01-56AY|LDP01-56AY|||||
|LDP01-68AY|LDP01-68AY|||||
|LDP01-82AY|LDP01-82AY|||||



## **4 Revision history** 

**Table 7. Document revision history** 

|**Date**|**Revision**|**Changes**|
|---|---|---|
|26-Nov-2014|1|Initial release.|
|01-Oct-2015|2|Added wildcard character in part number on the cover page.<br>Updated_Figure 4_.<br>Minor text changes.|



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**LDP01-xxAY** 

## **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. 

© 2015 STMicroelectronics – All rights reserved 

DocID026556 Rev 2 

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## Links

- [View this product on Novapart](https://novapart.co/products/LDP01-42AY/tvs-diode-ldp01-xxay-transil-unidirectional-36-v)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/stmicroelectronics/ldp01-42ay/tvs-diode-36v-unidir-to-263/dp/3132446)
---

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