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Vishay General Semiconductor - Diodes Division SMBG51-E3/52
- Part No.:
- SMBG51-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG51-E3/52.pdf
- Description:
- TVS DIODE 51VWM 91.1VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,198
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Product details
Overview
SMBG51-E3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMBG package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 51 V standoff voltage (VWM), 56.7–62.7 V breakdown voltage (VBR) at 1 mA, 82.4 V clamping voltage (VC) at 7.3 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used in automotive power supply input stages and industrial sensor interfaces.
For engineers reviewing the SMBG51-E3/52 datasheet, SMBG51-E3/52 pinout, SMBG51-E3/52 application, or SMBG51-E3/52 equivalent, key selection criteria include unidirectional polarity, DO-215AA (SMBG) surface-mount package compatibility, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compliance with UL 497B surge protector classification.
Technical Context
This TVS diode operates as a voltage-clamping device in parallel with protected circuitry, triggering into avalanche conduction when reverse voltage exceeds VBR. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the low incremental surge resistance enables effective energy diversion during transients.
The SMBG51-E3/52 is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports operating junction temperatures from –55 °C to +150 °C, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature - confirming suitability for high-reliability automated SMT assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 51 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 56.7 V / 62.7 V at 1 mA - guaranteed avalanche initiation range under standardized test conditions |
| VC @ IPPM | 82.4 V at 7.3 A - clamped voltage during 10/1000 µs transient, defining worst-case stress on downstream ICs |
| PPPM | 600 W - peak pulse power handling capability, enabling protection against IEC 61000-4-5 Level 4 surges |
| IFSM | 100 A - surge current rating for 8.3 ms half-sine waveform, supporting load-dump immunity in automotive 12 V systems |
| TJ max | +150 °C - maximum junction temperature, allowing operation in under-hood automotive environments |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads, guiding PCB thermal layout |
Pinout & Package
Package: DO-215AA (SMBG), surface-mount gull-wing leaded case with matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Avalanche conduction terminal | Connected to protected line (e.g., 12 V rail); clamps to VC when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage drift across lifetime and temperature extremes |
| MSL Level 1 | Zero floor life limitation; compatible with standard SMT reflow profiles up to 260 °C peak |
| UL 497B recognized | Qualified as a surge protector under Underwriters Laboratories' telecommunications safety standard QVGQ2 |
| RoHS-compliant (E3 suffix) | Meets EU Directive 2011/65/EU; lead-free matte tin plating with JESD 201 Class 1A whisker resistance |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground, clamping surges within microseconds. Use Value: Withstands 100 A IFSM and clamps to ≤82.4 V, preventing damage to downstream PMICs and microcontrollers. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD and inductive switching noise. IC Role / Device Role / Timing Role: Parallel-connected TVS on 0–5 V or 4–20 mA signal paths, responding in <1 ns. Use Value: Low leakage (<1 µA) avoids signal offset; 600 W PPPM handles repetitive transients in factory automation. |
| Telecom DC Power Feeds | Computer Peripheral Port Protection |
Use Scenario: Safeguarding PoE-powered devices (e.g., IP cameras) against induced surges on 48 V DC inputs. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input stage, coordinated with upstream fuses. Use Value: 51 V VWM allows margin above nominal 48 V, while VC = 82.4 V stays below typical 100 V input rating. |
Use Scenario: Adding secondary surge immunity to USB or HDMI power pins in docking stations. IC Role / Device Role / Timing Role: Standoff-rated TVS on VBUS lines, activated only during >51 V events. Use Value: Compact SMBG footprint saves board space; AEC-Q101 qualification adds confidence for mission-critical peripherals. |
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-E3/52 | Same VWM (51 V), identical SMB package, but lower PPPM (400 W vs. 600 W) and higher VC (87.1 V) | Limited to lower-energy transients; not recommended for automotive load dump where 600 W margin is required | Select SMBG51-E3/52 when 600 W surge handling and tighter clamping (82.4 V) are critical |
| 1.5SMC51A | Same electrical specs (VWM, VBR, VC), but larger SMC (DO-214AB) package with higher RθJA (60 °C/W) | Requires more PCB area; better suited for high-power, low-density layouts with enhanced thermal relief | Choose SMBG51-E3/52 for space-constrained designs needing AEC-Q101 and MSL Level 1 compliance |
Compared with SMBJ51A-E3/52 and 1.5SMC51A, the SMBG51-E3/52 delivers superior surge robustness in a smaller footprint, with verified automotive qualification and tighter thermal performance - making it optimal for next-generation compact, high-reliability DC protection.
Availability
SMBG51-E3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, telecom DC power feeds, and computer peripheral port protection requiring stable component supply and long-term lifecycle support.
Supply support for SMBG51-E3/52 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBG series was developed to deliver AEC-Q101-qualified, high-power TVS protection in ultra-low-profile surface-mount packages for automotive and industrial power systems demanding compact, robust surge immunity.
FAQ
What is the polarity configuration of SMBG51-E3/52?
The SMBG51-E3/52 is a unidirectional transient voltage suppressor diode, meaning it conducts only in reverse bias during overvoltage events. Its cathode is marked by a band on the SMBG package body, and it must be oriented with the cathode toward the protected line and anode toward ground or the lower-potential reference. This configuration ensures proper clamping behavior without forward conduction during normal operation.
Is SMBG51-E3/52 qualified for automotive applications?
Yes, SMBG51-E3/52 is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias, temperature cycling, and ESD per JEDEC standards. Its operating junction temperature range (–55 °C to +150 °C), MSL Level 1 rating, and UL 497B recognition confirm its suitability for under-hood and powertrain-related automotive modules where reliability under harsh conditions is mandatory.
What is the clamping voltage of SMBG51-E3/52 and how is it measured?
The SMBG51-E3/52 has a maximum clamping voltage (VC) of 82.4 V, measured at a peak pulse current (IPPM) of 7.3 A using a 10/1000 µs waveform. This value represents the upper limit of voltage seen by downstream circuitry during a standardized surge event and is critical for ensuring protected ICs remain within their absolute maximum ratings during transient conditions.
Does SMBG51-E3/52 meet RoHS and lead-free requirements?
Yes, the "E3" suffix in SMBG51-E3/52 indicates full compliance with RoHS Directive 2011/65/EU. The device uses matte tin-plated leads, passes JESD 201 Class 1A whisker testing, and carries no exemptions. It is also halogen-free per JEDEC JS709A, making it suitable for environmentally regulated markets and high-reliability manufacturing processes.
How does SMBG51-E3/52 compare to bi-directional TVS diodes like SMBG51CA?
The SMBG51-E3/52 is unidirectional and intended for DC line protection where polarity is fixed, whereas SMBG51CA is bi-directional and suited for AC or floating signal lines. SMBG51-E3/52 offers lower leakage (<1.0 µA) and tighter VBR tolerance than its bi-directional counterpart, but cannot protect against positive- and negative-going transients on the same node without additional circuitry.
SMBG51-E3/52 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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 51V
- Voltage - Breakdown (Min):
- 56.7V
- Voltage - Clamping (Max) @ Ipp:
- 91.1V
- Current - Peak Pulse (10/1000µs):
- 6.6A
- 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)
SMBG51-E3/52 FAQ
1.How can I place an order for SMBG51-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG51-E3/52 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 SMBG51-E3/52 reliable?
The price and inventory of SMBG51-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG51-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG51-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG51-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG51-E3/52?
SMBG51-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG51-E3/52 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 SMBG51-E3/52?
For technical support, including SMBG51-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG51-E3/52 requirements.
6.How does Aetrix verify that SMBG51-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG51-E3/52 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 SMBG51-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG51-E3/52?
All SMBG51-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG51-E3/52, 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 SMBG51-E3/52 part is unused and in its original packaging.
Return procedure for SMBG51-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG51-E3/52 Tags
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