# TVS Diode, Transil SMBJ Series, Unidirectional, 30 V, 48.4 V, DO-214AA (SMB), 2 Pins
**URL**: https://novapart.co/products/SMBJ30A-TR/tvs-diode-transil-smbj-series-unidirectional-30-v
**SKU**: SMBJ30A-TR
**Manufacturer**: STMICROELECTRONICS
**Category**: Circuit Protection || TVS - Transient Voltage Suppressors || TVS Diodes
**Price**: €0.1290
**Stock**: 1000+
**Lead Time**: 132 days (indicative)
## Description
Product Range:Transil SMBJ Series; TVS Polarity:Unidirectional; Reverse Stand-Off Voltage Vrwm:30V; Clamping Voltage Vc Max:48.4V; Diode Case Style:SMD; No. of Pins:2Pins; Breakdown Voltage Min:33.
## Specifications
| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2025) |
| No. Of Pins | 2Pins |
| Tvs Polarity | Unidirectional |
| Product Range | Transil SMBJ Series |
| Qualification | - |
| Diode Mounting | Surface Mount |
| Diode Case Style | DO-214AA (SMB) |
| Clamping Voltage Max | 48.4V |
| Reverse Standoff Voltage | 30V |
| Maximum Breakdown Voltage | 35.1V |
| Minimum Breakdown Voltage | 33.3V |
| Operating Temperature Max | 150°C |
| Peak Pulse Power Dissipation | 600W |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:9886230/)
**SMBJ**
Transil™
**==> picture [61 x 39] intentionally omitted <==**
## **Features**
- Peak pulse power:
- 600 W (10/1000 μ s)
- 4 kW (8/20 µs)
- Stand off voltage range: from 5 V to 188 V
- Unidirectional and bidirectional types
- Low leakage current: – 0.2 µA at 25 °C
- 1 µA at 85 °C
**==> picture [139 x 98] intentionally omitted <==**
**----- Start of picture text -----**
A
K
Unidirectional Bidirectional
SMB
(JEDEC DO-214AA)
**----- End of picture text -----**
- Operating Tj max: 150 °C
- High power capability at Tj max: – 515 W (10/1000 µs)
- 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)
- 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 SMBJ 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 600 W (10/1000 μ s).
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.
SMBJ 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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_www.st.com_
**Characteristics**
**SMBJ**
## **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)|Tjinitial = Tamb|600|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 resistances**
|**Symbol**|**Parameter**|**Value**|**Unit**|
|---|---|---|---|
|Rth(j-l)|Junction to leads|20|°C/W|
|Rth(j-a)|Junction to ambient on recommended pad layout|100|°C/W|
## **Figure 1. Electrical characteristics - definitions**
**==> picture [401 x 131] 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
**----- End of picture text -----**
## **Figure 2. Pulse definition for electrical characteristics**
**==> picture [199 x 129] intentionally omitted <==**
**----- Start of picture text -----**
% Ipp
Repetitive pulse current
tr = rise time (µs)
100
tp = pulse duration time (µs)
50
0 t
tr tp
**----- End of picture text -----**
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Doc ID 5616 Rev 10
**SMBJ**
**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)**|**VCL @IPP**
**10/1000 µs**|**VCL @IPP**
**10/1000 µs**|**RD (2)**
**10/1000 µs**|**VCL @IPP**
**8/20 µs**|**VCL @IPP**
**8/20 µs**|**RD (2)**
**8/20 µs**|α**T(3)**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
||**25 °C **|**85 °C**||**min**|**typ**||**max**|||**max**|||**max**|
||**µA**||**V**|**V**||**mA**|**V**|**A(4)**|Ω|**V**|**A(4)**|Ω|**10-4/ °C**|
|SMBJ5.0A/CA|20|50|5.0|6.4|6.74|10|9.2|68|0.031|13.4|298|0.021|5.7|
|SMBJ6.0A/CA|20|50|6.0|6.7|7.05|10|10.3|61|0.048|13.7|290|0.022|5.9|
|SMBJ6.5A/CA|20|50|6.5|7.2|7.58|10|11.2|56|0.058|14.5|276|0.024|6.1|
|SMBJ8.5A/CA|20|50|8.5|9.4|9.9|1|14.4|41.7|0.096|19.5|205|0.044|7.3|
|SMBJ10A/CA|0.2|1|10|11.1|11.7|1|17|37|0.127|21.7|184|0.051|7.8|
|SMBJ12A/CA|0.2|1|12|13.3|14|1|19.9|31|0.168|25.3|157|0.068|8.3|
|SMBJ13A/CA|0.2|1|13|14.4|15.2|1|21.5|29|0.191|27.2|147|0.076|8.4|
|SMBJ15A/CA|0.2|1|15|16.7|17.6|1|24.4|25.1|0.236|32.5|123|0.114|8.8|
|SMBJ16A/CA|0.2|1|16|17.8|18.7|1|26|23.1|0.276|34.4|116|0.127|8.8|
|SMBJ18A/CA|0.2|1|18|20.0|21.1|1|29.2|21.5|0.328|39.3|102|0.168|9.2|
|SMBJ20A/CA|0.2|1|20|22.2|23.4|1|32.4|19.4|0.404|42.8|93|0.196|9.4|
|SMBJ22A/CA|0.2|1|22|24.4|25.7|1|35.5|17.7|0.481|48.3|83|0.257|9.6|
|SMBJ24A/CA|0.2|1|24|26.7|28.1|1|38.9|16|0.587|50|80|0.256|9.6|
|SMBJ26A/CA|0.2|1|26|28.9|30.4|1|42.1|14.9|0.683|53.5|75|0.288|9.7|
|SMBJ28A/CA|0.2|1|28|31.1|32.7|1|45.4|13.8|0.802|59|68|0.363|9.8|
|SMBJ30A/CA|0.2|1|30|33.3|35.1|1|48.4|13|0.888|64.3|62|0.443|9.9|
|SMBJ33A/CA|0.2|1|33|36.7|38.6|1|53.3|11.8|1.08|69.7|57|0.512|10.0|
|SMBJ36A/CA|0.2|1|36|40.0|42.1|1|58.1|10.3|1.35|76|52|0.611|10.0|
|SMBJ40A/CA|0.2|1|40|44.4|46.7|1|64.5|9.7|1.59|84|48|0.728|10.1|
|SMBJ48A/CA|0.2|1|48|53.3|56.1|1|77.4|8.1|2.28|100|40|1.03|10.3|
|SMBJ58A/CA|0.2|1|58|64.4|67.8|1|93.6|6.7|3.34|121|33|1.51|10.4|
|SMBJ70A/CA|0.2|1|70|77.8|81.9|1|113|5.5|4.91|146|27|2.22|10.5|
|SMBJ85A/CA|0.2|1|85|94|99|1|137|4.6|7.18|178|22.5|3.29|10.6|
|SMBJ100A/CA|0.2|1|100|111|117|1|162|3.8|10.3|212|19|4.69|10.7|
|SMBJ130A/CA|0.2|1|130|144|152|1|209|3|16.5|265|15|7.03|10.8|
|SMBJ154A/CA|0.2|1|154|171|180|1|246|2.4|23.8|317|12.6|10.2|10.8|
|SMBJ170A/CA|0.2|1|170|189|199|1|275|2.2|30.0|353|11.3|12.7|10.8|
|SMBJ188A/CA|0.2|1|188|209|220|1|328|2|48.5|388|10.3|15.2|10.8|
1. Pulse test : t < 50 ms p
2. To calculate maximum clamping voltage at other surge level,use the following formula: VCLmax = VCL - RD x (IPP - IPPappli) where IPPappli is the surge current in the application
3. To calculate VBR or VCL versus junction temperature, use the following formulas: VBR @ TJ = VBR @ 25°C x (1 + αT x (TJ – 25)) VCL @ TJ = VCL @ 25°C x (1 + αT x (TJ – 25))
4. Surge capability given for both directions for unidirectional and bidirectional types.
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**Characteristics**
**SMBJ**
**==> picture [462 x 508] 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
(Tj initial = 25 °C)
700 Ppp (W) 100.0 PPP(kW)
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
Figure 5. Clamping voltage versus peak pulse current (exponential waveform, maximum values)
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
SMBJ5.0A SMBJ12A SMBJ24A SMBJ40A SMBJ85A SMBJ188A
**----- End of picture text -----**
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**SMBJ**
**Characteristics**
**==> picture [448 x 35] intentionally omitted <==**
**----- Start of picture text -----**
Figure 6. Junction capacitance versus Figure 7. Junction capacitance versus
reverse applied voltage for reverse applied voltage for
unidirectional types (typical values) bidirectional types (typical values)
**----- End of picture text -----**
**==> 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
SMBJ5.0CA
SMBJ5.0A
1000 1000 SMBJ12CA
SMBJ12A
SMBJ24CA
SMBJ24A SMBJ40CA
100 SMBJ40A 100 SMBJ85CA
SMBJ85A SMBJ188CA
VR(V) SMBJ188A VR(V)
10 10
1 10 100 1000 1 10 100 1000
**----- End of picture text -----**
## **Figure 8. Peak forward voltage drop versus peak forward current (typical values)**
**Figure 9. Relative variation of thermal impedance, junction to ambient, 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
PCB 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 PCB FR4, copper thickness = 35 µm VR=VRM
90 VRM < 10 V
80 1.E+02
70
60
1.E+01
50
40
30 1.E+00
20 VR=VRM
VRM ≥ 10 V
10 Tj(°C)
SCU(cm²)
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**
**SMBJ**
## **2 Ordering information scheme**
## **Figure 12. Ordering information scheme**
**==> picture [301 x 173] intentionally omitted <==**
**----- Start of picture text -----**
SM B J 85 CA - TR
Surface mount
Peak pulse power
B = 600 W Transil in SMB
Stand off voltage
85 = 85 V
Type
A = Unidirectional
CA = Bidirectional
Delivery mode
TR = Tape and reel
**----- End of picture text -----**
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**SMBJ**
**Package information**
## **3 Package information**
- Case: JEDEC DO-214AA molded plastic over planar junction
- Terminals: solder plated - solderable per MIL-STD-750, Method 2026
- Polarity: for unidirectional types the band indicates cathode
- Flammability: epoxy is rated UL94V-0
- 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.**|||**SMB dimensions**|**SMB dimensions**|**SMB dimensions**|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|**C**||||||||**b**||**Ref.**|**Dimensions**||||
|||||**E1**||**L**
**D**
**A1**
**A2**|||||**Millimeters**||**Inches**||
||||||||||||||||
||||||||||||**Min.**|**Max.**|**Min.**|**Max.**|
||||||||||||||||
|||||||||||A1|1.90|2.45|0.075|0.096|
|||||||||||A2|0.05|0.20|0.002|0.008|
|||||**E**|||||||||||
|||||||||||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|
|||||||||||E|5.10|5.60|0.201|0.220|
||||||||||||||||
|||||||||||E1|4.05|4.60|0.159|0.181|
|||||||||||L|0.75|1.50|0.030|0.059|
**Figure 13. Footprint dimensions in mm (inches)**
**Figure 14. Marking layout[(1)]**
**==> 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 complianceXXX: Marking
(0.086) x x x Z:Y: ManufacturingYear location
WW: week
z y w w
5.84
(0.23)
**----- End of picture text -----**
1. Marking layout can vary according to assembly location.
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**SMBJ**
**Package information**
**Table 5. Marking**
|**Table 5.**
**Marking**||||
|---|---|---|---|
|**Order code**|**Marking**|**Order code**|**Marking**|
|SMBJ5.0A-TR|BUZ|SMBJ5.0CA-TR|BBZ|
|SMBJ6.0A-TR|BUA|SMBJ6.0CA-TR|BBA|
|SMBJ6.5A-TR|BUB|SMBJ6.5CA-TR|BBB|
|SMBJ8.5A-TR|BUC|SMBJ8.5CA-TR|BBC|
|SMBJ10A-TR|BUD|SMBJ10CA-TR|BBD|
|SMBJ12A-TR|BUE|SMBJ12CA-TR|BBE|
|SMBJ13A-TR|BUF|SMBJ13CA-TR|BBF|
|SMBJ15A-TR|BUG|SMBJ15CA-TR|BBG|
|SMBJ16A-TR|CUG|SMBJ16CA-TR|CBG|
|SMBJ18A-TR|BUH|SMBJ18CA-TR|BBH|
|SMBJ20A-TR|BUI|SMBJ20CA-TR|BBI|
|SMBJ22A-TR|BVA|SMBJ22CA-TR|CBH|
|SMBJ24A-TR|BUJ|SMBJ24CA-TR|BBJ|
|SMBJ26A-TR|BUK|SMBJ26CA-TR|BBK|
|SMBJ28A-TR|BUL|SMBJ28CA-TR|BBL|
|SMBJ30A-TR|BUM|SMBJ30CA-TR|BBM|
|SMBJ33A-TR|BUN|SMBJ33CA-TR|BBN|
|SMBJ36A-TR|CUN|SMBJ36CA-TR|CBN|
|SMBJ40A-TR|CUJ|SMBJ40CA-TR|CBJ|
|SMBJ43A-TR|CUW|SMBJ43CA-TR|CBW|
|SMBJ48A-TR|BUW|SMBJ48CA-TR|BBW|
|SMBJ58A-TR|BUO|SMBJ58CA-TR|BBO|
|SMBJ70A-TR|CUM|SMBJ70CA-TR|CBM|
|SMBJ85A-TR|BUQ|SMBJ85CA-TR|BBQ|
|SMBJ100A-TR|CUQ|SMBJ100CA-TR|CBQ|
|SMBJ130A-TR|BUS|SMBJ130CA-TR|BBS|
|SMBJ154A-TR|BUT|SMBJ154CA-TR|BBT|
|SMBJ170A-TR|BUU|SMBJ170CA-TR|BBU|
|SMBJ188A-TR|BUV|SMBJ188CA-TR|BBV|
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**SMBJ**
**Ordering information**
## **4 Ordering information**
## **Table 6. Order codes**
|**Order code**|**Marking**|**Package**|**Weight**|**Base qty**|**Delivery mode**|
|---|---|---|---|---|---|
|SMBJxxxA/CA-TR(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**|
|---|---|---|
|Oct-2001|4|Previous issue|
|10-Feb-2005|5|Reformatted to current template. Added directional (uni and bi)
indications to graphics. Added ECOPACK statement.|
|16-Nov-2006|6|Add part numbers SMBJ36A-TR and SMBJ36CA-TR in_Table 3_.|
|14-May-2009|7|Reformatted to current standards. Updated ECOPACK
statement. Added part number SMBJ43CA/A|
|17-Sep-2009|8|Document updated for low leakage current.|
|09-Jul-2010|9|Changed timescale in_Figure 9._|
|20-Oct-2010|10|Updated_Figure 13._|
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**SMBJ**
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Doc ID 5616 Rev 10
## Links
- [View this product on Novapart](https://novapart.co/products/SMBJ30A-TR/tvs-diode-transil-smbj-series-unidirectional-30-v)
- [Request a quote for this part](https://novapart.co/quote/)
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