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Vishay General Semiconductor - Diodes Division SMBG30A-M3/5B
- Part No.:
- SMBG30A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG30A-M3/5B.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,297
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Product details
Overview
SMBG30A-M3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 30 V stand-off voltage (VWM), 33.3–36.8 V breakdown voltage (VBR) at 1 mA, 48.4 V clamping voltage (VC) at 12.4 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive ECUs, industrial sensor interfaces, and power supply input stages.
For engineers reviewing the SMBG30A-M3/5B datasheet, SMBG30A-M3/5B pinout, SMBG30A-M3/5B application, or SMBG30A-M3/5B equivalent, key selection criteria include clamping performance under 12.4 A surge, unidirectional polarity with cathode band marking, AEC-Q101 qualification for automotive use, halogen-free RoHS compliance (M3 suffix), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches to divert transient energy away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at 30 V), while the low incremental surge resistance enables fast response (<1 ns) to ESD and lightning-induced transients.
The SMBG30A-M3/5B is rated for TJ = –55 °C to +150 °C, with thermal resistance RθJA = 100 °C/W (on 0.2" × 0.2" pads) and RθJL = 20 °C/W, supporting reliable operation in high-temperature engine bay or industrial control environments without derating below 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 33.3 V / 36.8 V at IT = 1 mA - defines precise avalanche onset window for predictable protection threshold |
| VC @ IPPM | 48.4 V at 12.4 A - clamping voltage during 600 W 10/1000 μs surge, limiting stress on protected ICs |
| PPPM | 600 W - peak pulse power handling capability per single transient event, duty cycle ≤ 0.01 % |
| IFSM | 100 A - non-repetitive forward surge current rating (8.3 ms half-sine), relevant for fault-current limiting |
| TJ max. | +150 °C - maximum junction temperature enabling use in under-hood automotive locations |
| Package | SMBG (DO-215AA) - surface-mount, low-profile package with matte tin-plated leads, MSL Level 1 |
Pinout & Package
SMBG30A-M3/5B uses the SMBG (DO-215AA) package: a gull-wing surface-mount outline with cathode band marking on the anode-side end. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts avalanche current to ground during overvoltage events |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane to complete clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Halogen-free & RoHS compliant (M3) | Meets environmental compliance requirements for industrial and automotive OEM production |
| 600 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) without degradation |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or damage to 3.3 V/5 V logic |
| Fast response time (< 1 ns) | Clamps ESD transients (IEC 61000-4-2 ±8 kV contact) before sensitive circuitry responds |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in vehicle body control modules against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt clamping device placed between VIN and GND, activated within nanoseconds upon voltage excursion beyond 30 V. Use Value: Limits peak rail voltage to ≤48.4 V during 100 V/50 ms load dump events, preventing MCU brown-out or regulator failure. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in factory automation transmitters from field-wiring induced transients. IC Role / Device Role / Timing Role: Unidirectional TVS connected across output terminals to clamp reverse polarity faults and inductive kickback. Use Value: Withstands repeated 600 W surges without parameter shift, ensuring long-term reliability in harsh plant-floor EMI environments. |
| DC-DC Converter Input Protection | Automotive Camera Module ESD Protection |
Use Scenario: Front-end protection for buck converter inputs in infotainment head units exposed to battery transients and jump-start conditions. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of input filter capacitor and controller IC. Use Value: Clamps 120 V/100 ms ISO 7637-2 Test Pulse 5a to <49 V, preserving input capacitor lifetime and preventing controller latch-up. | Use Scenario: ESD protection on FAKRA or HSD cable interfaces of rear-view cameras subjected to human-body-model discharges. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed inline with video signal path to ground. Use Value: Sub-1 ns response and <1.0 μA leakage at 30 V prevent signal distortion while passing ±8 kV IEC 61000-4-2 ESD strikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG30A-E3/5B | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3) | Approved for industrial-grade use only; not qualified for AEC-Q101 automotive programs | Select SMBG30A-M3/5B when halogen-free requirement or automotive qualification is mandatory |
| SMBG33A-M3/5B | Higher VWM (33 V), VBR 36.7–40.6 V, VC 53.3 V at 11.3 A - 10 % higher clamping voltage | Better suited for 3.3 V rail protection where tighter VWM margin is needed; less effective on 12 V systems with wide tolerance | Choose SMBG30A-M3/5B for standard 12 V automotive rails requiring lower clamping voltage |
Compared with SMBG30A-E3/5B, the SMBG30A-M3/5B adds halogen-free compliance and AEC-Q101 qualification without sacrificing electrical performance; versus SMBG33A-M3/5B, it provides lower clamping voltage (48.4 V vs. 53.3 V) critical for protecting 12 V-rated components under surge conditions.
Availability
SMBG30A-M3/5B is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and DC-DC power supply designs requiring stable component supply, AEC-Q101 validation, and halogen-free manufacturing compliance.
Supply support for SMBG30A-M3/5B includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, automotive qualification, and high-power handling.
The SMBG series was engineered specifically for high-energy transient suppression in space-constrained automotive and industrial applications, balancing low clamping voltage, AEC-Q101 compliance, and robust 600 W surge capability in the DO-215AA footprint.
FAQ
What is the clamping voltage of SMBG30A-M3/5B and how is it measured?
The SMBG30A-M3/5B has a maximum clamping voltage (VC) of 48.4 V, measured at a peak pulse current (IPPM) of 12.4 A using a 10/1000 μs waveform. This value is guaranteed per Vishay's datasheet (Document Number: 88456, Rev. 09-Jan-2024) and reflects the voltage across the device during worst-case surge conduction - critical for verifying safe operating margins of downstream ICs. The SMBG30A-M3/5B maintains this clamping performance across its full operating temperature range.
Is SMBG30A-M3/5B suitable for automotive applications?
Yes, SMBG30A-M3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS camera modules. Its construction - glass-passivated junction, halogen-free molding compound (M3 suffix), and operation up to +150 °C junction temperature - meets stringent automotive reliability requirements. The SMBG30A-M3/5B appears in Vishay's AEC-Q101-qualified base P/N list (HM3 suffix variants), confirming its qualification status.
What does the "M3/5B" suffix mean in SMBG30A-M3/5B?
The "M3" suffix indicates halogen-free, RoHS-compliant, industrial-grade construction meeting JESD 201 Class 2 whisker resistance; "5B" denotes packaging in 13-inch diameter plastic tape and reel with 3200 units per reel. This differs from "E3/52" (RoHS but not halogen-free, 7-inch reel, 750 units) and confirms the SMBG30A-M3/5B is optimized for high-volume, environmentally compliant SMT assembly. The SMBG30A-M3/5B's M3 designation is verified in Vishay's ordering information table (page 3, Document 88456).
How does SMBG30A-M3/5B compare to bidirectional TVS diodes like SMBG30CA?
SMBG30A-M3/5B is unidirectional and features a cathode band for polarity identification, while SMBG30CA is bidirectional with no polarity marking and symmetrical clamping in both directions. The SMBG30A-M3/5B offers lower leakage (<1.0 μA at 30 V) and supports forward surge current (IFSM = 100 A), making it appropriate for DC rail protection; SMBG30CA is used where AC or reversible signal lines require protection. Electrical parameters differ: SMBG30CA has VBR = 33.3–36.8 V in both directions, but no IFSM rating.
What PCB layout guidance applies to SMBG30A-M3/5B for optimal surge performance?
For optimal transient suppression, mount SMBG30A-M3/5B with minimum trace length between cathode and protected node, and anode to low-inductance ground plane - ideally using 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal as specified in the datasheet. Avoid vias or narrow traces in the clamping path; thermal relief is not recommended. The SMBG30A-M3/5B's RθJA = 100 °C/W assumes this pad layout, and deviation degrades both surge handling and thermal stability.
SMBG30A-M3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 12.4A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG30A-M3/5B FAQ
1.How can I place an order for SMBG30A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG30A-M3/5B on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMBG30A-M3/5B reliable?
The price and inventory of SMBG30A-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG30A-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBG30A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG30A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG30A-M3/5B?
SMBG30A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG30A-M3/5B order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMBG30A-M3/5B?
For technical support, including SMBG30A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG30A-M3/5B requirements.
6.How does Aetrix verify that SMBG30A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG30A-M3/5B products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMBG30A-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBG30A-M3/5B?
All SMBG30A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG30A-M3/5B, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMBG30A-M3/5B part is unused and in its original packaging.
Return procedure for SMBG30A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG30A-M3/5B Tags
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