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Vishay General Semiconductor - Diodes Division SMBG51HE3/52
- Part No.:
- SMBG51HE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG51HE3/52.pdf
- Description:
- TVS DIODE 51VWM 91.1VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,007
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Product details
Overview
SMBG51HE3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-215AA (SMBG) package, designed for robust overvoltage protection of power and signal lines. It features a 51 V standoff voltage (VWM), 56.7–62.7 V breakdown range (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 - deployed in automotive power supply rails and industrial sensor interfaces.
For engineers reviewing the SMBG51HE3/52 datasheet, SMBG51HE3/52 pinout, SMBG51HE3/52 application, or SMBG51HE3/52 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, RoHS-compliant material compliance, and direct replacement guidance for high-reliability transient suppression design.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging glass-passivated junction technology for stable surge response. Its low incremental surge resistance and sub-nanosecond response time enable effective suppression of ESD, lightning-induced transients, and inductive switching spikes in DC power paths.
Rated for -55 °C to +150 °C junction temperature, it delivers 600 W peak pulse power under JEDEC-standard 10/1000 µs waveform with 0.01% duty cycle, and supports 100 A non-repetitive forward surge current (IFSM) per 8.3 ms half-sine wave - validated per AEC-Q101 stress test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 51 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected line |
| VBR (min/max) | 56.7 V / 62.7 V at 1 mA - guaranteed breakdown onset range; ensures consistent turn-on across production lots |
| VC @ IPPM | 82.4 V at 7.3 A - clamped voltage during 10/1000 µs surge; determines maximum stress on downstream ICs |
| PPPM | 600 W - peak pulse power handling capability; enables protection against high-energy transients without failure |
| IFSM | 100 A - single half-sine surge current rating (8.3 ms); validates robustness against motor or relay coil kickback |
| TJ max | +150 °C - maximum junction temperature; supports operation in under-hood automotive and industrial enclosures |
| RθJA | 100 °C/W - thermal resistance junction-to-ambient; informs PCB copper pad sizing for sustained surge duty cycles |
Pinout & Package
Package: DO-215AA (SMBG), surface-mount, low-profile gull-wing lead frame with matte tin-plated terminals compliant to J-STD-002 and JESD 22-B102. Cathode identified by molded band on case end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected circuit; conducts during forward surge events (e.g., reverse battery connection) |
| Cathode | Reverse-biased clamping terminal | Connected to higher-potential side (e.g., VIN rail); initiates avalanche breakdown when VIN exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD47 |
| Glass passivated junction | Ensures stable VBR tolerance and long-term leakage stability under humidity and thermal stress |
| MSL Level 1 (260 °C) | Compatible with standard SMT reflow profiles without moisture sensitivity concerns |
| RoHS-compliant HE3 suffix | Meets JESD201 Class 2 whisker resistance; suitable for high-vibration automotive harnesses and connectors |
| 600 W 10/1000 µs rating | Provides margin above ISO 7637-2 Pulse 1/2/5a requirements for 12 V vehicle systems |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between VBAT and ground, absorbing >100 V spikes within nanoseconds. Use Value: Limits voltage seen by MCU power input to ≤82.4 V, preventing latch-up or permanent damage during 35 V/100 ms load dump events. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: Bidirectional-capable layout (though SMBG51HE3/52 is unidirectional) used in series with signal line to clamp induced surges from nearby motor drives. Use Value: Maintains signal integrity by clamping fast-rising transients (<1 ns rise time) while adding <1 pF capacitance to avoid bandwidth degradation. |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
Use Scenario: Securing 48 V PoE-powered network switches against Ethernet cable-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Primary TVS on DC input rail upstream of DC-DC converter, rated for 600 W peak pulse energy. Use Value: Withstands repetitive 10/1000 µs surges up to 0.01% duty cycle without parameter drift, ensuring multi-year field reliability. |
Use Scenario: Adding secondary overvoltage defense on USB VBUS line in portable speakers or docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND to block reverse polarity and suppress ESD per IEC 61000-4-2 Level 4. Use Value: Clamps 8 kV contact ESD events to <85 V within <1 ns, protecting USB controller ICs without affecting 5 V regulation accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51AHE3/52 | Same DO-215AA package, identical VWM/VBR/VC, but rated for 600 W with tighter VBR tolerance (5% vs. SMBG51HE3/52's 10%) | Preferred where tighter clamping consistency is required across temperature; same PCB footprint | Select SMBJ51AHE3/52 if design requires tighter VBR distribution or legacy SMBJ footprint compatibility |
| 1.5SMC51A | DO-214AB (SMC) package, larger footprint, higher thermal mass; same 51 V VWM, but 1.5 kW PPPM rating | Used where higher single-pulse energy absorption is needed, e.g., heavy industrial motor controls | Choose 1.5SMC51A only when surge energy exceeds 600 W capability and board space allows larger SMC outline |
Compared with SMBJ51AHE3/52, the SMBG51HE3/52 offers identical protection performance in a smaller DO-215AA footprint but with wider VBR tolerance; versus 1.5SMC51A, it trades peak power headroom for compactness and AEC-Q101 qualification - making SMBG51HE3/52 optimal for space-constrained automotive modules.
Availability
SMBG51HE3/52 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom power supplies, and consumer USB protection requiring stable component supply with full traceability and lifecycle management.
Supply support for SMBG51HE3/52 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMBG series was engineered specifically for AEC-Q101-compliant transient suppression in harsh-environment automotive power systems, balancing compact size, high surge capability, and process-controlled parametric stability.
FAQ
What is the exact breakdown voltage range for SMBG51HE3/52?
The SMBG51HE3/52 has a guaranteed breakdown voltage (VBR) range of 56.7 V to 62.7 V at 1 mA test current, per Vishay Document 88456. This 10% tolerance reflects the device's unidirectional construction and is measured under standard JEDEC conditions. The SMBG51HE3/52 maintains this specification across its full operating temperature range of -55 °C to +150 °C.
Is SMBG51HE3/52 suitable for bi-directional transient protection?
No - SMBG51HE3/52 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. It clamps only in reverse bias and conducts forward current like a rectifier. For bi-directional protection, Vishay specifies part numbers ending in "CA", such as SMBG51CA. Using SMBG51HE3/52 in bi-directional applications risks forward conduction during negative transients and inadequate clamping.
Does SMBG51HE3/52 meet automotive qualification standards?
Yes - the "HE3" suffix confirms SMBG51HE3/52 is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet revision 12-Nov-12. This includes stress testing for temperature cycling, high-temperature reverse bias, and ESD per JESD47. The device also meets MSL Level 1 per J-STD-020 and JESD201 Class 2 whisker resistance, making it suitable for under-hood automotive use.
What is the clamping voltage of SMBG51HE3/52 at its rated peak pulse current?
The SMBG51HE3/52 clamps to a maximum of 82.4 V at its specified peak pulse current (IPPM) of 7.3 A, using the standard 10/1000 µs waveform. This value is measured under defined test conditions (mounted on 5.0 mm × 5.0 mm copper pads) and represents the upper limit of voltage imposed on protected circuitry during surge events - critical for validating downstream IC survivability.
How does the HE3 suffix differ from E3 in Vishay SMBG part numbering?
The HE3 suffix in SMBG51HE3/52 denotes AEC-Q101 qualification and JESD201 Class 2 whisker resistance, whereas E3 indicates commercial-grade RoHS compliance only. Both share the same DO-215AA package and electrical specs, but HE3 is screened for automotive reliability, including extended temperature cycling and accelerated life testing - essential for safety-critical vehicle subsystems.
SMBG51HE3/52 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG51HE3/52 FAQ
1.How can I place an order for SMBG51HE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG51HE3/52 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 SMBG51HE3/52 reliable?
The price and inventory of SMBG51HE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG51HE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG51HE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG51HE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG51HE3/52?
SMBG51HE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG51HE3/52 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 SMBG51HE3/52?
For technical support, including SMBG51HE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG51HE3/52 requirements.
6.How does Aetrix verify that SMBG51HE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG51HE3/52 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 SMBG51HE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG51HE3/52?
All SMBG51HE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG51HE3/52, 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 SMBG51HE3/52 part is unused and in its original packaging.
Return procedure for SMBG51HE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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