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Vishay General Semiconductor - Diodes Division SMBG51A-E3/5B
- Part No.:
- SMBG51A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG51A-E3/5B.pdf
- Description:
- TVS DIODE 51VWM 82.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,089
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Product details
Overview
SMBG51A-E3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 51 V stand-off voltage (VWM), 56.7–62.7 V breakdown voltage (VBR) at 1 mA, 82.4 V maximum clamping voltage (VC) at 7.3 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMBG51A-E3/5B datasheet, SMBG51A-E3/5B pinout, SMBG51A-E3/5B application, or SMBG51A-E3/5B equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 to +150 °C), and RoHS-compliant packaging details essential for ESD/surge protection design-in and BOM validation.
Technical Context
The SMBG51A-E3/5B operates as a unidirectional avalanche diode, clamping transients above its breakdown threshold while maintaining low leakage (<1.0 μA at 51 V) under normal bias. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and fast response time (<1.0 ns), critical for protecting MOSFET gates and microcontroller I/O against inductive switching spikes.
Rated for 600 W peak pulse power (10/1000 μs), it sustains repetitive surges at 0.01 % duty cycle and handles 100 A non-repetitive forward surge (8.3 ms half-sine). Thermal performance is defined by RθJL = 20 °C/W and RθJA = 100 °C/W on 5.0 mm × 5.0 mm copper pads - enabling reliable operation in high-temperature automotive and industrial environments up to TJ = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 51 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below system rail voltage. |
| VBR @ IT = 1 mA | 56.7–62.7 V - Breakdown voltage range defining turn-on threshold; tight ±5 % tolerance ensures predictable clamping onset. |
| VC @ IPPM = 7.3 A | 82.4 V - Clamped voltage during 10/1000 μs surge; limits stress on downstream ICs to safe levels. |
| PPPM | 600 W - Peak pulse power handling capacity; supports high-energy transients without failure under standard test conditions. |
| IFSM | 100 A - Non-repetitive forward surge rating (8.3 ms); protects against accidental polarity reversal or load dump events. |
| TJ Range | –55 to +150 °C - Extended junction temperature range enables use in under-hood automotive and industrial control cabinets. |
| AEC-Q101 | Qualified - Certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards. |
Pinout & Package
Package: SMBG (DO-215AA) - surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002; meets UL 94 V-0 flammability rating and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VLINE exceeds VBR. |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping current path during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables protection against high-energy transients like ISO 7637-2 Load Dump pulses in 12 V automotive systems. |
| AEC-Q101 qualification | Validates long-term reliability for automotive applications including engine control, ADAS sensors, and body electronics. |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture-related popcorning or delamination risks. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic interfaces. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges exceeding 51 V. Use Value: Limits peak voltage to ≤82.4 V during 600 W transients, preventing damage to MCU power supplies and CAN transceivers. |
Use Scenario: Shielding analog output lines of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS on 4–20 mA or 0–10 V signal paths to absorb ESD and switching noise. Use Value: Sub-1 ns response and <1.0 μA leakage preserve signal integrity while meeting IEC 61000-4-2 Level 4 (15 kV air) requirements. |
| Consumer Power Adapter Input Stage | Telecom DC Power Interface |
|
Use Scenario: Input-side surge suppression in wall adapters powering USB-C PD devices. IC Role / Device Role / Timing Role: Primary overvoltage clamp ahead of AC-DC controller ICs and input capacitors. Use Value: Withstands 100 A surge (8.3 ms) and maintains VWM = 51 V margin above 48 V nominal input, avoiding false triggering. |
Use Scenario: DC feed protection in PoE-powered network switches and base station RF modules. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional device used across +48 V DC bus and return path. Use Value: 150 °C max junction temperature and RθJA = 100 °C/W allow operation in sealed telecom enclosures without forced cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A-E3/5B | Same VWM (51 V), but lower PPPM = 600 W (same rating), higher VC = 87.1 V at 6.9 A; SMB (DO-214AA) package, slightly larger footprint. | Less suitable for space-constrained automotive modules where SMBG's smaller DO-215AA outline is preferred. | Select SMBG51A-E3/5B when board area is limited and AEC-Q101 qualification is mandatory; SMBJ51A-E3/5B may be used if legacy layout accommodates larger package. |
| SMCJ51A-E3/5B | Same VWM/VBR, but higher PPPM = 1500 W and VC = 84.5 V at 17.7 A; SMC (DO-214AB) package, ~2× PCB area. | Better suited for high-energy industrial motor drives where >600 W clamping is required; over-spec'd for most automotive signal protection. | Choose SMBG51A-E3/5B for cost-optimized, space-efficient 600 W protection in AEC-Q101-compliant designs; reserve SMCJ51A-E3/5B for applications demanding >1 kW surge handling. |
Compared with SMBJ51A-E3/5B and SMCJ51A-E3/5B, the SMBG51A-E3/5B delivers identical 51 V standoff and 600 W rating in the smallest qualified footprint (DO-215AA), with AEC-Q101 certification out-of-box - making it the optimal choice for next-gen automotive and compact industrial modules where size, qualification, and performance must coexist.
Availability
SMBG51A-E3/5B is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power inputs requiring stable component supply, AEC-Q101 compliance, and RoHS-conformant packaging.
Supply support for SMBG51A-E3/5B 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBG series was engineered for high-reliability surface-mount transient suppression in automotive and industrial environments, combining AEC-Q101 qualification, low-profile packaging, and precise clamping performance.
FAQ
What is the breakdown voltage range of the SMBG51A-E3/5B?
The SMBG51A-E3/5B has a specified breakdown voltage (VBR) range of 56.7 V to 62.7 V at 1 mA test current, per Vishay's datasheet revision 09-Jan-2024. This ±5 % tolerance ensures consistent clamping behavior across production lots and supports robust design margins in 48–54 V system architectures. The SMBG51A-E3/5B achieves this via a precisely doped, glass-passivated silicon junction.
Is the SMBG51A-E3/5B suitable for automotive applications?
Yes, the SMBG51A-E3/5B is AEC-Q101 qualified per the Vishay datasheet, confirming compliance with stress tests including temperature cycling, high-temperature reverse bias, and ESD. Its –55 to +150 °C operating range, MSL Level 1 reflow rating, and 600 W surge capability make it appropriate for engine control modules, body controllers, and ADAS sensor interfaces. The SMBG51A-E3/5B is explicitly listed in Vishay's AEC-Q101 qualified devices table.
What is the maximum clamping voltage of the SMBG51A-E3/5B at rated surge current?
The SMBG51A-E3/5B exhibits a maximum clamping voltage (VC) of 82.4 V at 7.3 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is measured with the device mounted on 5.0 mm × 5.0 mm copper pads per JEDEC guidelines. The SMBG51A-E3/5B maintains this clamping performance across its full operating temperature range.
Does the SMBG51A-E3/5B have bidirectional capability?
No, the SMBG51A-E3/5B is a unidirectional TVS diode, indicated by the "A" suffix and absence of "CA" in the part number. Its cathode band marks the terminal that must be connected toward the protected line, with anode tied to ground. For bidirectional operation, Vishay offers the SMBG51CA variant - which shares the same package and VWM but conducts in both directions. The SMBG51A-E3/5B is not rated for reverse conduction beyond its specified leakage current.
What packaging format does the SMBG51A-E3/5B ship in?
The SMBG51A-E3/5B ships in 13-inch diameter plastic tape and reel packaging, with a base quantity of 3200 units per reel (ordering code "5B"). The "E3" suffix denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads. This packaging supports high-speed automated placement and is compatible with standard SMT pick-and-place equipment. The SMBG51A-E3/5B reel meets J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
SMBG51A-E3/5B 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):
- 51V
- Voltage - Breakdown (Min):
- 56.7V
- Voltage - Clamping (Max) @ Ipp:
- 82.4V
- Current - Peak Pulse (10/1000µs):
- 7.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG51A-E3/5B FAQ
1.How can I place an order for SMBG51A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG51A-E3/5B 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 SMBG51A-E3/5B reliable?
The price and inventory of SMBG51A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG51A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG51A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG51A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG51A-E3/5B?
SMBG51A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG51A-E3/5B 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 SMBG51A-E3/5B?
For technical support, including SMBG51A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG51A-E3/5B requirements.
6.How does Aetrix verify that SMBG51A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG51A-E3/5B 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 SMBG51A-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG51A-E3/5B?
All SMBG51A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG51A-E3/5B, 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 SMBG51A-E3/5B part is unused and in its original packaging.
Return procedure for SMBG51A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG51A-E3/5B Tags
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