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Vishay General Semiconductor - Diodes Division SMBG51AHE3/52
- Part No.:
- SMBG51AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG51AHE3/52.pdf
- Description:
- TVS DIODE 51VWM 82.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,273
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Product details
Overview
SMBG51AHE3/52 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 in automotive power line and sensor interface protection.
For engineers reviewing the SMBG51AHE3/52 datasheet, SMBG51AHE3/52 pinout, SMBG51AHE3/52 application, or SMBG51AHE3/52 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 bidirectional/unidirectional polarity distinctions critical for ESD and load-dump surge design validation.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (<1 μA leakage at 51 V), then rapidly avalanches below 62.7 V to clamp transients. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance, enabling fast response (<1 ns) to ESD and lightning-induced surges.
Designed for surface-mount automated assembly on PCBs with 5.0 mm × 5.0 mm copper pads per terminal, SMBG51AHE3/52 meets MSL Level 1 (reflow peak 260 °C) and is AEC-Q101 qualified - confirming suitability for automotive under-hood and infotainment systems where reliability under thermal cycling and mechanical stress is mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 51 V - maximum continuous reverse operating voltage before conduction begins; defines safe working margin for 48 V automotive systems. |
| VBR (min/max) | 56.7 V / 62.7 V at IT = 1 mA - tight breakdown window ensures predictable turn-on across production lots. |
| VC @ IPPM | 82.4 V at 7.3 A - clamping voltage limits downstream IC stress during 600 W transient events. |
| PPPM | 600 W - peak pulse power handling with 10/1000 μs waveform supports ISO 7637-2 Pulse 1/2/5a compliance testing. |
| IFSM | 100 A - non-repetitive forward surge rating enables protection against 8.3 ms inductive switch-off spikes. |
| TJ range | –55 °C to +150 °C - extended junction temperature operation supports engine bay and powertrain applications. |
| RθJA | 100 °C/W - thermal resistance informs board-level thermal design when mounted on 5.0 mm × 5.0 mm copper pads. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected circuit ground or low-side reference. | Completes clamping path during reverse-transient events; must be routed with low-inductance trace to minimize overshoot. |
| Cathode | Current exit point in forward bias; marked with band; connected to protected line (e.g., 48 V rail or signal). | Defines polarity-sensitive placement - reversal disables protection; required for unidirectional surge suppression only. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - required for Tier-1 power module designs. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal stress and humidity exposure. |
| 600 W peak pulse power (10/1000 μs) | Supports full ISO 7637-2 load-dump immunity without derating when mounted per recommended pad layout. |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture-related popcorning; eliminates pre-bake requirement in SMT lines. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD > 15 kV), improving system-level EMC robustness. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs from load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp surges above 51 V. Use Value: Limits rail voltage to ≤82.4 V during 600 W transients, preventing damage to downstream DC-DC controllers and microcontrollers. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLCs from inductive switching noise. IC Role / Device Role / Timing Role: Low-capacitance (typ. <50 pF at 0 V) unidirectional TVS on signal line to ground, preserving signal integrity up to 1 MHz. Use Value: Clamps EFT bursts (IEC 61000-4-4) without distorting mV-level sensor signals due to sub-1 ns response and minimal leakage (<1 μA). |
| Telecom Power Feeds | Consumer USB-C Power Delivery |
Use Scenario: Safeguarding PoE-powered equipment (IEEE 802.3bt) from induced surges on 57 V DC feed lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on midspan injector output, coordinated with secondary TVS on powered device input. Use Value: Withstands repetitive 10/1000 μs surges at 0.01% duty cycle while maintaining <1 μA leakage at 51 V - ensuring no standby power loss. | Use Scenario: Secondary-level surge protection on USB-C VBUS line after primary front-end protection in portable chargers. IC Role / Device Role / Timing Role: Fast-response unidirectional TVS placed adjacent to USB-C controller IC to suppress hot-swap and connector arcing transients. Use Value: 82.4 V clamping prevents latch-up in USB PD controllers rated for 20 V max, while RoHS-compliant HE3 suffix meets consumer safety standards. |
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 (DO-214AA) package but 600 W rating; slightly higher VC (87.1 V) and lower IPPM (6.9 A). | Less stringent clamping performance; not AEC-Q101 qualified - limited to industrial/commercial use. | Select SMBJ51A-E3/52 only if AEC-Q101 is not required and board layout allows DO-214AA footprint. |
| SMCJ51AHE3/52 | Same VWM/VBR, but SMC (DO-214AB) package with 1500 W rating; VC = 84.5 V at 17.7 A; RθJA = 35 °C/W. | Higher power handling and better thermal dissipation; larger footprint (7.11 mm × 6.22 mm vs. SMBG's 4.57 mm × 3.94 mm). | Choose SMCJ51AHE3/52 when system-level surge tests exceed 600 W or ambient temperatures exceed 105 °C. |
Compared with SMBJ51A-E3/52 and SMCJ51AHE3/52, SMBG51AHE3/52 uniquely balances AEC-Q101 qualification, compact SMBG footprint, and precise 82.4 V clamping - making it optimal for space-constrained automotive modules where both reliability and layout density are critical.
Availability
SMBG51AHE3/52 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom power feeds, and consumer USB-C PD systems requiring stable component supply with full traceability and lifecycle management.
Supply support for SMBG51AHE3/52 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, rectifiers, MOSFETs, and protection devices with emphasis on high-reliability, AEC-Q101-qualified components for automotive and industrial markets.
The SMBG series was engineered specifically for surface-mount transient suppression in space-constrained, thermally demanding environments - delivering 600 W pulse capability in the smallest possible DO-215AA outline while maintaining automotive-grade qualification.
FAQ
What is the clamping voltage of SMBG51AHE3/52 and how is it measured?
The SMBG51AHE3/52 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 per IEC 61000-4-5. This value reflects worst-case voltage seen by protected circuitry during standardized surge events and is guaranteed across the full operating temperature range (–55 to +150 °C). The SMBG51AHE3/52 achieves this with low incremental surge resistance, minimizing overshoot beyond the specified VC.
Is SMBG51AHE3/52 suitable for automotive applications?
Yes, SMBG51AHE3/52 is AEC-Q101 qualified and explicitly rated for automotive use - confirmed in Vishay's official documentation (Doc. #88456, Rev. 09-Jan-2024). Its construction includes glass-passivated junction, MSL Level 1 reflow compatibility, and operation from –55 °C to +150 °C junction temperature. The HE3 suffix denotes AEC-Q101 qualification, making SMBG51AHE3/52 appropriate for engine control units, ADAS sensors, and body electronics where reliability under thermal and mechanical stress is mandatory.
What does the "HE3/52" suffix mean in SMBG51AHE3/52?
The "HE3" suffix indicates RoHS-compliant, AEC-Q101-qualified construction with matte tin-plated leads meeting J-STD-002 solderability and JESD 22-B102 whisker resistance (Class 2). The "/52" denotes packaging in 7" diameter plastic tape and reel, with 750 units per reel - standard for SMT pick-and-place manufacturing. This full designation confirms SMBG51AHE3/52 meets automotive-grade material, process, and packaging requirements out-of-box.
How does SMBG51AHE3/52 compare to bidirectional TVS diodes like SMBG51CA?
SMBG51AHE3/52 is unidirectional and intended for DC line protection with defined polarity (cathode marked); SMBG51CA is bidirectional and used for AC or floating signal lines. While both share VWM = 51 V and similar VBR, the unidirectional SMBG51AHE3/52 offers lower leakage (<1 μA at VWM) and supports forward surge current (IFSM = 100 A), which SMBG51CA does not. Use SMBG51AHE3/52 on 48 V rails; use SMBG51CA only on differential or AC-coupled paths.
What PCB layout guidance applies to SMBG51AHE3/52 for optimal surge performance?
For optimal transient suppression, mount SMBG51AHE3/52 with minimum trace length between cathode and protected line, and anode to solid ground plane - ideally using 5.0 mm × 5.0 mm copper pads per terminal as specified in the datasheet. Avoid vias in the clamping path; keep traces wide (>1 mm) and short (<5 mm). Thermal relief should be minimized to maintain RθJA = 100 °C/W. These practices ensure SMBG51AHE3/52 achieves its rated 600 W pulse power and 82.4 V clamping without inductive overshoot.
SMBG51AHE3/52 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:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG51AHE3/52 FAQ
1.How can I place an order for SMBG51AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG51AHE3/52 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 SMBG51AHE3/52 reliable?
The price and inventory of SMBG51AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG51AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG51AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG51AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG51AHE3/52?
SMBG51AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG51AHE3/52 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 SMBG51AHE3/52?
For technical support, including SMBG51AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG51AHE3/52 requirements.
6.How does Aetrix verify that SMBG51AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG51AHE3/52 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 SMBG51AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG51AHE3/52?
All SMBG51AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG51AHE3/52, 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 SMBG51AHE3/52 part is unused and in its original packaging.
Return procedure for SMBG51AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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