# TVS Diode, Transil SM6T Series, Unidirectional, 10.2 V, 21.7 V, DO-214AA (SMB), 2 Pins
**URL**: https://novapart.co/products/SM6T12A/tvs-diode-transil-sm6t-series-unidirectional-102-v
**SKU**: SM6T12A
**Manufacturer**: STMICROELECTRONICS
**Category**: Circuit Protection || TVS - Transient Voltage Suppressors || TVS Diodes
**Price**: €0.1840
**Stock**: 1000+
**Lead Time**: 132 days (indicative)
## Description
Product Range:Transil SM6T Series; TVS Polarity:Unidirectional; Reverse Stand-Off Voltage Vrwm:10.2V; Clamping Voltage Vc Max:21.7V; Diode Case Style:DO-214AA; No. of Pins:2Pins; Breakdown Voltage
## Specifications
| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2025) |
| No. Of Pins | 2Pins |
| Tvs Polarity | Unidirectional |
| Product Range | Transil SM6T Series |
| Qualification | - |
| Diode Mounting | Surface Mount |
| Diode Case Style | DO-214AA (SMB) |
| Clamping Voltage Max | 21.7V |
| Reverse Standoff Voltage | 10.2V |
| Maximum Breakdown Voltage | 12.6V |
| Minimum Breakdown Voltage | 11.4V |
| Operating Temperature Max | 150°C |
| Peak Pulse Power Dissipation | 600W |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:9885862RL/)
**SM6T**
Transil™
**==> picture [61 x 39] intentionally omitted <==**
## **Features**
- Peak pulse power: – 600 W (10/1000 µs)
- 4 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: – 515 W (10/1000 µs)
**==> picture [145 x 95] intentionally omitted <==**
**----- Start of picture text -----**
A
K
Unidirectional Bidirectional
SMB
(JEDEC DO-214AA)
**----- 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
- 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 soldererability
- EIA STD RS-481 and IEC 60286-3 packing
- IPC 7531 footprint
## **Description**
The SM6T 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 overstress according to IEC 61000-4-4 and 5. These devices are more generally used against surges below 600 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.
SM6T are packaged in SMB (SMB footprint in accordance with IPC 7531 standard).
**TM** : Transil is a trademark of STMicroelectronics
October 2010
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Doc ID 3082 Rev 9
_www.st.com_
**Characteristics**
**SM6T**
## **1 Characteristics**
## **Table 1. Absolute maximum ratings**
|**Symbol**|**Parameter**|**Parameter**|**Value**|**Unit**|
|---|---|---|---|---|
|PPP|Peak pulse power dissipation(1)|Tjinitial = Tamb|600|W|
|Tstg|Storage temperature range||-65 to 150|°C|
|Tj|Operating junction temperature range||-55 to 150||
|TL|Maximum lead temperature for soldering during 10 s.||260||
|1.
For a surge greater than the maximum values, the diode will fail in short-circuit.|||||
|**Table 2.**
**Thermal resistance**|**Table 2.**
**Thermal resistance**|**Table 2.**
**Thermal resistance**|**Table 2.**
**Thermal resistance**|
|---|---|---|---|
|**Symbol**|**Parameter**|**Value**|**Unit**|
|Rth(j-l)|Junction to leads|20|°C/W|
|Rth(j-a)|Junction to ambient on printed circuit on recommended pad layout|100|°C/W|
## **Figure 1. Electrical characteristics - definitions**
**==> picture [461 x 270] 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
Repetitive pulse current
tr = rise time (µs)
tp = pulse duration time (µs)
tr tp
**----- End of picture text -----**
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**SM6T**
**Characteristics**
**Table 3. Electrical characteristics, parameter values (Tamb = 25 °C)**
|**Order code**|**IRMmax@VRM**|**IRMmax@VRM**|**IRMmax@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**|
|SM6T6V8A/CA|20|50|5.8|6.45|6.8|7.14|10|10.5|57|0.059|13.4|298|0.021|5.7|
|SM6T7V5A/CA|20|50|6.4|7.13|7.5|7.88|10|11.3|53|0.065|14.5|276|0.024|6.1|
|SM6T10A/CA|20|50|8.55|9.5|10|10.5|1|14.5|41|0.098|18.6|215|0.038|7.3|
|SM6T12A/CA|0.2|1|10.2|11.4|12|12.6|1|16.7|36|0.114|21.7|184|0.049|7.8|
|SM6T15A/CA|0.2|1|12.8|14.3|15|15.8|1|21.2|28|0.193|27.2|147|0.078|8.4|
|SM6T18A/CA|0.2|1|15.3|17.1|18|18.9|1|25.2|24|0.263|32.5|123|0.111|8.8|
|SM6T22A/CA|0.2|1|18.8|20.9|22|23.1|1|30.6|20|0.375|39.3|102|0.159|9.2|
|SM6T24A/CA|0.2|1|20.5|22.8|24|25.2|1|33.2|18|0.444|42.8|93|0.189|9.4|
|SM6T27A/CA|0.2|1|23.1|25.7|27|28.4|1|37.5|16|0.569|48.3|83|0.240|9.6|
|SM6T30A/CA|0.2|1|25.6|28.5|30|31.5|1|41.5|14.5|0.690|53.5|75|0.293|9.7|
|SM6T33A/CA|0.2|1|28.2|31.4|33|34.7|1|45.7|13.1|0.840|59.0|68|0.357|9.8|
|SM6T36A/CA|0.2|1|30.8|34.2|36|37.8|1|49.9|12|1.01|64.3|62|0.427|9.9|
|SM6T39A/CA|0.2|1|33.3|37.1|39|41.0|1|53.9|11.1|1.16|69.7|57|0.504|10.0|
|SM6T56A/CA|0.2|1|47.6|53.2|56|58.8|1|76.6|7.8|2.28|100|40|1.030|10.0|
|SM6T68A/CA|0.2|1|58.1|64.6|68|71.4|1|92|6.5|3.17|121|33|1.503|10.4|
|SM6T75A/CA|0.2|1|64.1|71.3|75|78.8|1|103|5.8|4.17|134|30|1.84|10.5|
|SM6T100A/CA|0.2|1|85.5|95.0|100|105|1|137|4.4|7.27|178|22.5|3.24|10.6|
|SM6T150A/CA|0.2|1|128|143|150|158|1|207|2.9|16.9|265|15|7.13|10.8|
|SM6T200A/CA|0.2|1|171|190|200|210|1|274|2.2|29.1|353|11.3|12.7|10.8|
|SM6T220A/CA|0.2|1|188|209|220|231|1|328|2|48.5|388|10.3|15.2|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**
**SM6T**
**Figure 3. Peak power dissipation versus Figure 4. Peak pulse power versus initial junction temperature exponential pulse duration**
**==> picture [462 x 190] intentionally omitted <==**
**----- Start of picture text -----**
Ppp (W) PPP(kW)
700 100.0
Tj initial = 25 °C
600
500
10.0
400
300
1.0
200
100
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
**----- End of picture text -----**
## **Figure 5. Clamping voltage versus peak pulse current (maximum values)**
**==> picture [422 x 278] intentionally omitted <==**
**----- Start of picture text -----**
IPP(A)
1000.0
Tj initial=25 °C
100.0
10.0 8/20 µs
10/1000 µs
1.0
10 ms
VCL(V)
0.1
1 10 100 1000
SM6T6V8A SM6T15A SM6T30A SM6T68A SM6T100A SM6T220A
**----- End of picture text -----**
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**SM6T**
**Characteristics**
**Figure 6. Capacitance versus reverse applied voltage for unidirectional types (typical values)**
## **Figure 7. Capacitance versus reverse applied voltage for bidirectional types (typical values)**
**==> picture [462 x 146] intentionally omitted <==**
**----- Start of picture text -----**
C (pF) C (pF)
10000 10000
F=1 MHz F=1 MHz
Vosc=30 mVRMS Vosc=30 mVRMS
Tj=25 °C Tj=25 °C
SM6T6V8CA
SM6T6V8A
1000 1000 SM6T15CA
SM6T15A
SM6T30CA
SM6T30A
SM6T68CA
100 SM6T68A 100 SM6T100CA
SM6T100A SM6T220CA
V R (V) SM6T220A V R (V)
10 10
1 10 100 1000 1 10 100 1000
**----- End of picture text -----**
**Figure 8. Peak forward voltage drop versus Figure 9. Relative variation of thermal peak forward current impedance junction to ambient (typical values) versus pulse duration**
**==> picture [462 x 340] intentionally omitted <==**
**----- Start of picture text -----**
1.0E+02 IFM(A) 1.00 Zth (j-a)/Rth (j-a)
Recommended pad layout
Printed circuit board FR4, copper thickness = 35 µm
1.0E+01
Tj =125 °C
Tj =25 °C
1.0E+00 0.10
1.0E-01
VFM(V) tp s
1.0E-02 0.01
0.0 0.5 1.0 1.5 2.0 2.5 3.0 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
110 Rth(j-a)(°C/W) 1.E+03 IR (nA)
100
90 (printed circuit board FR4,copper thickness = 35 µm) VRMVR < 10 V=VRM
80 1.E+02
70
60
1.E+01
50
40
30 1.E+00 VVRMR ≥=V10 VRM
20
10 SCu(cm²) Tj (° C)
0 1.E-01
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
**----- End of picture text -----**
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**Ordering information scheme**
**SM6T**
## **2 Ordering information scheme**
## **Figure 12. Ordering information scheme**
**==> picture [355 x 188] intentionally omitted <==**
**----- Start of picture text -----**
SM 6 T 100 CA
Surface mount
Peak pulse power
6 = 600 W Transil in SMB
Breakdown voltage
100 = 100 V
Types
CA = Bidirectional
A = Unidirectional
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**SM6T**
**Packaging information**
## **3 Packaging information**
- Case: JEDEC DO-214AA 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 meets 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. SMB dimensions**
|**C**|||||||||**b**|**b**|**Ref.**|**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|||**E1**||||**L**
**D**
**A1**
**A2**||||||**Millimeters**||**Inches**||
|||||||||||||**Min.**|**Max.**|**Min.**|**Max.**|
|||||||||||||||||
||||||||||||A1|1.90|2.45|0.075|0.096|
|||**E**|||||||||A2|0.05|0.20|0.002|0.008|
||||||||||||b|1.95|2.20|0.077|0.087|
||||||||||||c|0.15|0.40|0.006|0.016|
|||||||||||||||||
||||||||||||D|3.30|3.95|0.130|0.156|
|||||||**L**||||||||||
||||||||||||E|5.10|5.60|0.201|0.220|
||||||||||**b**||E1|4.05|4.60|0.159|0.181|
|||||||||||||||||
||||||||||||L|0.75|1.50|0.030|0.059|
**Figure 13. SMB footprint dimensions in Figure 14. Marking layout[(1)] mm (inches)**
**==> picture [406 x 146] intentionally omitted <==**
**----- Start of picture text -----**
1.62 2.60 1.62
(0.064) (0.102) (0.064) Cathode bar (unidirectional devices only )
2.18 e e: ECOPACK compliance
XXX: Marking
(0.086) x x x Z: Manufacturing locationY: Year
WW: Week
5.84 z y w w
(0.23)
**----- End of picture text -----**
1. Marking layout can vary according to assembly location.
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**SM6T**
**Packaging information**
**Table 5.**
**Marking**
|**Table 5.**
**Marking**||||
|---|---|---|---|
|**Order code**|**Marking**|**Order code**|**Marking**|
|SM6T6V8A|DE|SM6T6V8CA|LE|
|SM6T7V5A|DG|SM6T7V5CA|LG|
|SM6T10A|DP|SM6T10CA|LP|
|SM6T12A|DT|SM6T12CA|LT|
|SM6T15A|DX|SM6T15CA|LX|
|SM6T18A|EE|SM6T18CA|ME|
|SM6T22A|EK|SM6T22CA|MK|
|SM6T24A|EM|SM6T24CA|MM|
|SM6T27A|EP|SM6T27CA|MP|
|SM6T30A|ER|SM6T30CA|MR|
|SM6T33A|ET|SM6T33CA|MT|
|SM6T36A|EV|SM6T36CA|MV|
|SM6T39A|EX|SM6T39CA|MX|
|SM6T56A|FL|SM6T56CA|NL|
|SM6T68A|FQ|SM6T68CA|NQ|
|SM6T75A|FS|SM6T75CA|NS|
|SM6T100A|FY|SM6T100CA|NY|
|SM6T150A|GL|SM6T150CA|OL|
|SM6T200A|GU|SM6T200CA|OU|
|SM6T220A|GW|SM6T220CA|OW|
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**SM6T**
**Ordering information**
## **4 Ordering information**
**Table 6. Ordering information**
|**Order code**|**Marking**|**Package**|**Weight**|**Base qty**|**Delivery mode**|
|---|---|---|---|---|---|
|SM6TxxxA/CA(1)|See_Table 5 on page 8_|SMB|0.11 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**|**Changes**|
|---|---|---|
|August-2001|4A|Previous update.|
|15-Sep-2004|5|1. Types table parameters on page 2: IRM@ Tj= 85 °C condition added
2. IRMmax values changed|
|26-Mar-2008|6|Reformatted to current standard. SMB dimensions and footprint updated.
Maximum junction temperature replaced with operating junction
temperature range in_Table 1_.|
|25-May-2009|7|Reformatted to current standard. Added standards compliance
information on page 1. Added device SM6T56 to_Table 3_. Updated all
characteristic curves.|
|17-Sep-2009|8|Document updated for low leakage current.|
|20-Oct-2010|9|Updated_Figure 13._|
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**SM6T**
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## Links
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