# TVS Diode, Transil SM15T Series, Unidirectional, 30.8 V, 64.3 V, DO-214AB (SMC), 2 Pins
**URL**: https://novapart.co/products/SM15T36A/tvs-diode-transil-sm15t-series-unidirectional-308
**SKU**: SM15T36A
**Manufacturer**: STMICROELECTRONICS
**Category**: Circuit Protection || TVS - Transient Voltage Suppressors || TVS Diodes
**Price**: €0.3700
**Stock**: 1000+
**Lead Time**: 132 days (indicative)
## Description
Product Range:SM15T Series; TVS Polarity:Unidirectional; Reverse Stand-Off Voltage Vrwm:30.8V; Clamping Voltage Vc Max:64.3V; Diode Case Style:DO-214AB; No. of Pins:2Pins; Breakdown Voltage Min:34
## Specifications
| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2025) |
| No. Of Pins | 2Pins |
| Tvs Polarity | Unidirectional |
| Product Range | Transil SM15T Series |
| Qualification | - |
| Diode Mounting | Surface Mount |
| Diode Case Style | DO-214AB (SMC) |
| Clamping Voltage Max | 64.3V |
| Reverse Standoff Voltage | 30.8V |
| Maximum Breakdown Voltage | 37.8V |
| Minimum Breakdown Voltage | 34.2V |
| Operating Temperature Max | 150°C |
| Peak Pulse Power Dissipation | 1.5kW |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:9885781RL/)
**SM15T**
Transil™
**==> picture [61 x 39] intentionally omitted <==**
## **Features**
- Peak pulse power:
- 1500 W (10/1000 µs)
- 10 kW (8/20 µs)
- Breakdown voltage range: from 6.8 V to 220 V
- Unidirectional and bidirectional types
- Low leakage current:
- 0.2 µA at 25 °C
- 1 µA at 85 °C
- Operating Tj max: 150 °C
- High power capability at Tjmax: – 1250 W (10/1000 µs)
**==> picture [144 x 107] intentionally omitted <==**
**----- Start of picture text -----**
A
K
Unidirectional Bidirectional
SMC
(JEDEC DO-214AB)
**----- End of picture text -----**
- JEDEC registered package outline
## **Complies with the following standards**
- IEC 61000-4-2 level 4
- 15 kV (air discharge)
-
- 8 kV (contact discharge)
- IEC 61000-4-5
- See _Table 3_ for surge level
- MIL STD 883G, method 3015-7: class 3B – 25 kV HBM (human body model)
- UL 497B file number: QVGQ2.E136224
- Resin meets UL 94, V0
- MIL-STD-750, method 2026 soldererabilty
- EIA STD RS-481 and IEC 60286-3 packing
- IPC 7531 footprint
## **Description**
The SM15T Transil series has been designed to protect sensitive equipment against electrostatic discharges according to IEC 61000-4-2, and MIL STD 883, method 3015, and electrical over stress according to IEC 61000-4-4 and 5. These devices are more generally used against surges below 1500 W (10/1000 µs).
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.
SM15T are packaged in SMC (SMC footprint in accordance with IPC 7531 standard).
TM: Transil is a trademark of STMicroelectronics
September 2009
1/10
Doc ID 3080 Rev 6
_www.st.com_
**Characteristics**
**SM15T**
## **1 Characteristics**
## **Table 1. Absolute maximum ratings (Tamb = 25** °C **)**
|**Table 1.**|**Absolute maximum ratings (Tamb = 25**°C**)**|**Absolute maximum ratings (Tamb = 25**°C**)**|||
|---|---|---|---|---|
|**Symbol**|**Parameter**||**Value**|**Unit**|
|PPP|Peak pulse power dissipation(1)|Tj initial= Tamb|1500|W|
|Tstg|Storage temperature range||-65 to + 150|°C|
|Tj|Operating junction temperature range||-55 to + 150|°C|
|TL|Maximum lead temperature for soldering during 10 s.||260|°C|
1. For a surge greater than the maximum values, the diode will fail in short-circuit.
## **Table 2. Thermal parameter**
|**Symbol**|**Parameter**|**Value**|**Unit**|
|---|---|---|---|
|Rth(j-l)|Junction to leads|15|°C/W|
|Rth(j-a)|Junction to ambient on printed circuit on recommended pad layout|90|°C/W|
## **Figure 1. Electrical characteristics - definitions**
**==> picture [461 x 280] intentionally omitted <==**
**----- Start of picture text -----**
I I
Symbol VRM Parameter Stand-off voltage Unidirectional IF IPP
VBR Breakdown voltage
VIRMCL Leakage current @ VClamping voltage RM VCLVBR VRM VF V VCLVBR VRM IIRMR V
IαPPT Peak pulse currentVoltage temperature coefficient IRMIR IRMIR VRMVBR VCL
VF Forward voltage drop
RD Dynamic resistance IPP IPP Bidirectional
Figure 2. Pulse definition for electrical characteristics
%IPP
100
Pulse waveform
50 tr = rise time (µs)
tp = pulse duration time (µs)
0 t
tr tp
**----- End of picture text -----**
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Doc ID 3080 Rev 6
**SM15T**
**Characteristics**
**Table 3. Electrical characteristics, parameter values (Tamb = 25 °C)**
|**Order code**|**IRM max@VRM**|**IRM max@VRM**|**IRM max@VRM**|**VBR @IR (1)**|**VBR @IR (1)**|**VBR @IR (1)**|**VBR @IR (1)**|**VCL @IPP**
**10/1000 µs**|**VCL @IPP**
**10/1000 µs**|**RD**
**10/1000**
**µs**|**VCL @IPP**
**8/20 µs**|**VCL @IPP**
**8/20 µs**|**RD**
**8/20**
**µs**|α**T(2)**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
||**25 °C **|**85 °C**||**min**|**typ **|**max**||**max**|||**max**|||**max**|
||**µA**||**V**|**V**|||**mA**|**V(3)**|**A(4)**|Ω|**V(3)**|**A(4)**|Ω|**10-4/ °C**|
|SM15T6V8A/CA|500|2000|5.8|6.45|6.8|7.14|10|10.5|143|0.023|13.4|746|0.008|5.7|
|SM15T7V5A/CA|250|1000|6.4|7.13|7.5|7.88|10|11.3|132|0.026|14.5|690|0.010|6.1|
|SM15T10A/CA|10|50|8.55|9.5|10|10.5|1|14.5|103|0.039|18.6|538|0.015|7.3|
|SM15T12A/CA|0.2|1|10.2|11.4|12|12.6|1|16.7|90|0.046|21.7|461|0.020|7.8|
|SM15T15A/CA|0.2|1|12.8|14.3|15|15.8|1|21.2|71|0.076|27.2|368|0.031|8.4|
|SM15T18A/CA|0.2|1|15.3|17.1|18|18.9|1|25.2|59.5|0.106|32.5|308|0.044|8.8|
|SM15T22A/CA|0.2|1|18.8|20.9|22|23.1|1|30.6|49|0.153|39.3|254|0.064|9.2|
|SM15T24A/CA|0.2|1|20.5|22.8|24|25.2|1|33.2|45|0.178|42.8|234|0.075|9.4|
|SM15T27A/CA|0.2|1|23.1|25.7|27|28.4|1|37.5|40|0.228|48.3|207|0.096|9.6|
|SM15T30A/CA|0.2|1|25.6|28.5|30|31.5|1|41.5|36|0.278|53.5|187|0.12|9.7|
|SM15T33A/CA|0.2|1|28.2|31.4|33|34.7|1|45.7|33|0.333|59.0|169|0.14|9.8|
|SM15T36A/CA|0.2|1|30.8|34.2|36|37.8|1|49.9|30|0.403|64.3|156|0.17|9.9|
|SM15T39A/CA|0.2|1|33.3|37.1|39|41.0|1|53.9|28|0.461|69.7|143|0.20|10.0|
|SM15T68A/CA|0.2|1|58.1|64.6|68|71.4|1|92|16.3|1.26|121|83|0.60|10.4|
|SM15T75A/CA|0.2|1|64.1|71.3|75|78.8|1|103|14.6|1.66|134|75|0.74|10.5|
|SM15T100A/CA|0.2|1|85.5|95.0|100|105|1|137|11|2.91|178|56|1.30|10.6|
|SM15T150A/CA|0.2|1|128|143|150|158|1|207|7.2|6.81|265|38|2.82|10.8|
|SM15T200A/CA|0.2|1|171|190|200|210|1|274|5.5|11.6|353|28|5.11|10.8|
|SM15T220A/CA|0.2|1|188|209|220|231|1|328|4.6|21.1|388|26|6.04|10.8|
1. Pulse test : t < 50 ms p
2. To calculate VBR versus junction temperature, use the following formula: VBR @ TJ = VBR @ 25°C x (1 + αT x (TJ – 25)).
3. To calculate maximum clamping voltage at other surge level, use the following formula: VCL = RD x IPP + VBRmax.
4. Surge capability given for both directions for unidirectional and bidirectional types.
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**Characteristics**
**SM15T**
**==> picture [462 x 524] intentionally omitted <==**
**----- Start of picture text -----**
Figure 3. Peak pulse power dissipation Figure 4. Peak pulse power versus
versus initial junction temperature exponential pulse duration
(printed circuit board)
Ppp (W) PPP (kW)
2000 100.0
10/1000 µs Tj initial = 25 °C
1500
10.0
1000
1.0
500
Tj(°C) tp (ms)
0 0.1
0 25 50 75 100 125 150 175 1.0E-03 1.0E-02 1.0E-01 1.0E+00 1.0E+01
Figure 5. Clamping voltage versus peak pulse current (maximum values)
IPP (A)
1000.0
Tj initial=25 °C
100.0
8/20 µs
10.0
10/1000 µs
10 ms
1.0
VCL (V)
0.1
1 10 100 1000
15T 10A
SM15T 6V8A SM SM15T 30A
SM15T 22A
SM15T 68A
SM15T 150A
SM15T 220A
**----- End of picture text -----**
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Doc ID 3080 Rev 6
**SM15T**
**Characteristics**
**Figure 6. Capacitance versus reverse applied Figure 7. Capacitance versus reverse applied voltage (typical values, SM15TxxA) voltage (typical values, SM15TxxCA)**
**==> picture [462 x 151] intentionally omitted <==**
**----- Start of picture text -----**
C (nF) C (nF)
10.00 10.0
F=1 MHz F=1 MHz
SM15T6V8A Vosc=30 mVRMS SM15T6V8CA Vosc=30 mVRMS
Tj=25 °C Tj=25 °C
SM15T15A
1.00 SM15T15CA
SM15T30A
1.0 SM15T30CA
SM15T68A
0.10 SM15T68CA
SM15T200A
VR (V) VR (V) SM15T200CA
0.01 0.1
1 10 100 1000 1 10 100 1000
**----- End of picture text -----**
**Figure 8. Peak forward voltage drop versus forward current (typical values)**
**Figure 9. Relative variation of thermal impedance junction to ambient versus pulse duration**
**==> picture [462 x 374] intentionally omitted <==**
**----- Start of picture text -----**
IFM (A) Zth(j-a) / Rth(j-a)
100.0 1.00
Recommended pad layout
10.0
Tj=125 °C
0.10
Tj=25 °C
1.0
VFM (V) tP(s)
0.1 0.01
0.0 0.5 1.0 1.5 2.0 2.5 1.0E-03 1.0E-02 1.0E-01 1.0E+00 1.0E+01 1.0E+02 1.0E+03
Figure 10. Thermal resistance junction to Figure 11. Leakage current versus junction
ambient versus copper surface temperature (typical values)
under each lead
Rth (j-a)(°C/ W) I R(nA)
100 1.0E+04
90 printed circuit board FR4,
80 copper thickness = 35 µm
1.0E+03
70 VR=VRM
VRM < 10 V
60
50 1.0E+02
40
30
1.0E+01
20
10 SCu (cm²) VVRMR ≥=V10 VRM Tj (°C)
0 1.0E+00
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 25 50 75 100 125 150
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**Ordering information scheme**
**SM15T**
## **2 Ordering information scheme**
## **Figure 12. Ordering information scheme**
**==> picture [370 x 158] intentionally omitted <==**
**----- Start of picture text -----**
SM 15 T 100 CA
Surface mount
Surge rating
15 = 1500 W Transil in SMC
Breakdown voltage
100 = 100 V
Type s
CA = Bidirectional
A = Unidirectional
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**SM15T**
**Package information**
## **3 Package information**
- Case: JEDEC DO-214AB molded plastic over planar junction
- Terminals: solder plated, solderable as per MIL-STD-750, Method 2026
- Polarity: for unidirectional types the band indicates cathode
- Flammability: epoxy is rated UL 94, V0
- RoHS package
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.
|**Table 4.**|**Table 4.**|**Table 4.**|**Table 4.**|**SMC dimensions**|**SMC dimensions**|**SMC dimensions**||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|**C**|||||||||**b**||**Ref.**|**Dimensions**||||
|||||||||||||**Millimeters**||**Inches**||
|||||||||||||**Min.**|**Max.**|**Min.**|**Max.**|
|||||**E1**||**D**
**A1**
**A2**||||||||||
||||||||||||A1|1.90|2.45|0.075|0.096|
|||||||||||||||||
||||||||||||A2|0.05|0.20|0.002|0.008|
||||||||||||b|2.90|3.20|0.114|0.126|
|||||**E**||||||||||||
||||||||||||c|0.15|0.40|0.006|0.016|
||||||||||||D|5.55|6.25|0.218|0.246|
|||||||||||||||||
||||||||||||E|7.75|8.15|0.305|0.321|
|||||||||||||||||
|||||**E2**|**L**||||**b**||E1|6.60|7.15|0.260|0.281|
||||||||||||E2|4.40|4.70|0.173|0.185|
||||||||||||L|0.75|1.50|0.030|0.059|
**Figure 13. SMC footprint dimensions in mm Figure 14. Marking layout[(1)] (inches)**
**==> picture [462 x 146] intentionally omitted <==**
**----- Start of picture text -----**
1.54 5.11 1.54
(0.061) (0.201) (0.061) Cathode bar (unidirectional devices only )
3.14 e e: ECOPACK compliance
(0.124) XXX: Marking
x x x Z:Y: ManufacturingYear location
WW: week
z y w w
8.19
(0.322)
**----- End of picture text -----**
1. Marking layout can vary according to assembly location.
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Doc ID 3080 Rev 6
**SM15T**
**Package information**
**Table 5.**
**Marking**
|**Table 5.**
**Marking**||||
|---|---|---|---|
|**Order code**|**Marking**|**Order code**|**Marking**|
|SM15T6V8A|MDE|SM15T6V8CA|BDE|
|SM15T7V5A|MDG|SM15T7V5CA|BDG|
|SM15T10A|MDP|SM15T10CA|BDP|
|SM15T12A|MDT|SM15T12CA|BDT|
|SM15T15A|MDX|SM15T15CA|BDX|
|SM15T18A|MEE|SM15T18CA|BEE|
|SM15T22A|MEK|SM15T22CA|BEK|
|SM15T24A|MEM|SM15T24CA|BEM|
|SM15T27A|MEP|SM15T27CA|BEP|
|SM15T30A|MER|SM15T30CA|BER|
|SM15T33A|MET|SM15T33CA|BET|
|SM15T36A|MEV|SM15T36CA|BEV|
|SM15T39A|MEX|SM15T39CA|BEX|
|SM15T68A|MFP|SM15T68CA|BFP|
|SM15T75A|MFO|SM15T75CA|BFO|
|SM15T100A|MFX|SM15T100CA|BFX|
|SM15T150A|MGK|SM15T150CA|BGK|
|SM15T200A|MGV|SM15T200CA|BGV|
|SM15T220A|MGX|SM15T220CA|BGX|
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**SM15T**
**Ordering information**
## **4 Ordering information**
## **Table 6. Ordering information**
|**Order code**|**Marking**|**Package**|**Weight**|**Base qty**|**Delivery mode**|
|---|---|---|---|---|---|
|SM15TxxxA/CA(1)|See_Table 5 on page 8_|SMC|0.25 g|2500|Tape and reel|
1. Where xxx is nominal value of VBR and A or CA indicates unidirectional or bidirectional version. See _Table 3_ for list of available devices and their order codes
## **5 Revision history**
**Table 7. Document revision history**
|**Date**|**Revision**|**Description of changes**|
|---|---|---|
|September-2001|3B|Last issue|
|19-Feb-2007|4|Peak pulse power_Figure 4 on page 4_updated.|
|04-Feb-2009|5|Updated ECOPACK statement. Added RDcolumns in
_Table 3_. Updated characteristic curves,_Figure 3_to
_Figure 11_.|
|17-Sep-2009|6|Document updated for low leakage current.|
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**SM15T**
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10/10
Doc ID 3080 Rev 6
## Links
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