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Vishay General Semiconductor - Diodes Division SMBG33AHE3/52
- Part No.:
- SMBG33AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG33AHE3/52.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,920
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Product details
Overview
SMBG33AHE3/52 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 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR) at 1 mA, 53.3 V clamping voltage (VC) at 11.3 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - deployed on automotive sensor signal lines, industrial I/O ports, and DC power rails.
For engineers reviewing the SMBG33AHE3/52 datasheet, SMBG33AHE3/52 pinout, SMBG33AHE3/52 application, or SMBG33AHE3/52 equivalent, key selection criteria include its AEC-Q101 qualification, 150 °C max junction temperature, low 1.0 μA reverse leakage at VWM, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging a glass-passivated silicon junction to deliver fast response (<1 ns) and low incremental surge resistance. Its electrical behavior follows standardized transient suppression curves per ANSI/IEEE C62.35, with derating applied above 25 °C ambient per Fig. 2 and validated thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead).
The SMBG33AHE3/52 is rated for non-repetitive 100 A forward surge current (8.3 ms half-sine), supports 260 °C lead-free reflow per J-STD-020 MSL Level 1, and exhibits 1.0 μA maximum reverse leakage at 33 V - confirming stable high-impedance blocking prior to avalanche conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - Confirmed avalanche onset range under standardized test conditions |
| VC @ IPPM | 53.3 V at 11.3 A - Clamped voltage limiting during 10/1000 μs transient, protecting downstream ICs |
| PPPM | 600 W - Peak pulse power handling capability with 0.01% duty cycle repetitive surges |
| IFSM | 100 A - Surge current tolerance for 8.3 ms single half-sine wave (unidirectional only) |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| Leakage @ VWM | 1.0 μA - Minimal standby power loss and signal integrity impact in high-impedance circuits |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile gull-wing lead frame with matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction; tied to system ground in standard protection configuration | Provides reference node for clamping action; must be connected to lowest impedance ground plane |
| Cathode | Protected line connection; carries transient energy into the device during overvoltage events | Connected to I/O line or power rail requiring protection; marked with band for orientation verification |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, mechanical shock, and humidity testing |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal stress |
| MSL Level 1 (260 °C) | Enables single-reflow assembly without moisture-related popcorn failure risk |
| 600 W peak pulse power | Handles ISO 7637-2 Pulse 1/2a/5a transients common in 12 V vehicle electrical systems |
| Low 1.0 μA leakage @ VWM | Minimizes quiescent current draw in battery-powered sensor nodes and always-on circuits |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in engine control units. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between signal line and chassis ground, activated within <1 ns of overvoltage event. Use Value: Limits voltage to ≤53.3 V during 100 V/50 ms load dump (ISO 16750-2), preventing damage to 3.3 V/5 V interface ICs. | Use Scenario: Safeguarding digital input modules in programmable logic controllers against ESD and field-wiring induced surges in factory automation. IC Role / Device Role / Timing Role: Front-end transient suppressor on 24 V DC input channels, shunting surge energy before optocoupler or MCU GPIO. Use Value: Withstands repeated 1 kV EFT bursts (IEC 61000-4-4) and 1.2/50 μs lightning surges up to 600 W without degradation. |
| DC Power Rail Protection | Consumer Device USB Port Protection |
Use Scenario: Guarding 3.3 V/5 V/12 V power distribution networks in embedded systems from reverse polarity, hot-swap spikes, and capacitive discharge events. IC Role / Device Role / Timing Role: Parallel-connected TVS across supply rail and ground, conducting only during overvoltage excursions above 33 V. Use Value: Clamps 10/1000 μs surges to 53.3 V while maintaining <1.0 μA leakage - preserving efficiency and enabling use in energy-sensitive designs. | Use Scenario: Adding secondary-level surge immunity to USB 2.0 data lines and VBUS in portable medical monitors and smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on VBUS line, coordinated with primary protection to meet IEC 61000-4-5 Level 3. Use Value: Provides 600 W surge margin while meeting USB-IF ESD requirements (±15 kV air, ±8 kV contact) without signal distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A-E3/52 | Same VWM (33 V), identical SMB (DO-214AA) package but 600 W rating; slightly higher VC (53.3 V vs. 53.3 V - matched), lower thermal resistance (RθJA = 85 °C/W) | Preferred where PCB space allows larger SMB footprint and enhanced thermal dissipation is needed | Select SMBJ33A-E3/52 if board layout permits DO-214AA and junction temperature margin is critical |
| 1.5SMC33A | Same electrical specs (33 V VWM, 53.3 V VC), but in larger SMC (DO-214AB) package; higher IPPM (11.9 A), same PPPM (600 W) | Better suited for high-energy industrial surge environments requiring mechanical robustness and higher surge repetition tolerance | Choose 1.5SMC33A when mounting on larger copper areas or where vibration resistance is prioritized over footprint size |
Compared with SMBG33AHE3/52, SMBJ33A-E3/52 offers improved thermal performance in a marginally larger package, while 1.5SMC33A provides greater mechanical ruggedness and surge endurance - making SMBG33AHE3/52 optimal for space-constrained AEC-Q101-compliant automotive modules where SMBG's low profile and gull-wing leads support fine-pitch automated assembly.
Availability
SMBG33AHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O modules, and DC power rail protection requiring stable component supply, AEC-Q101 compliance, and RoHS-conformant manufacturing.
Supply support for SMBG33AHE3/52 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 reliability, precision, and automotive-grade qualification.
The SMBG series is engineered specifically for high-reliability transient suppression in space-constrained, thermally demanding environments - targeting automotive, industrial, and telecom applications where AEC-Q101 validation and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of SMBG33AHE3/52 and how is it measured?
The SMBG33AHE3/52 has a maximum clamping voltage (VC) of 53.3 V, measured at a peak pulse current (IPPM) of 11.3 A using the standardized 10/1000 μs double-exponential waveform. This value reflects the actual voltage seen by protected circuitry during a transient event and is guaranteed per the Vishay datasheet revision 09-Jan-2024, Document Number 88456. The SMBG33AHE3/52 maintains this clamping performance across its full operating temperature range.
Is SMBG33AHE3/52 suitable for automotive applications?
Yes, SMBG33AHE3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its 150 °C maximum junction temperature, MSL Level 1 reflow compatibility, and validation against temperature cycling, mechanical shock, and humidity ensure reliability in engine control units, body electronics, and ADAS sensor modules. The "HE3" suffix confirms AEC-Q101 qualification per Vishay's ordering nomenclature.
What does the "HE3/52" suffix mean in SMBG33AHE3/52?
The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification, while "/52" specifies packaging in 7-inch diameter plastic tape and reel with a base quantity of 750 units. This format aligns with Vishay's standardized ordering code: HE3 = AEC-Q101 + RoHS, 52 = 7" reel. The SMBG33AHE3/52 is not halogen-free - that variant would carry "HM3".
How does SMBG33AHE3/52 differ from bidirectional TVS diodes like SMBG33CA?
SMBG33AHE3/52 is unidirectional and functions only in reverse-bias clamping mode, with polarity-sensitive cathode marking. In contrast, SMBG33CA is bidirectional and symmetrical - suppressing transients in both directions without polarity dependence. The SMBG33AHE3/52 offers lower leakage (1.0 μA vs. up to 2.0 μA for CA variants) and is preferred for DC power rail or signal-line protection where directionality is known and controlled.
What is the thermal resistance of SMBG33AHE3/52 and why does it matter?
SMBG33AHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value determines how much the junction temperature rises under power dissipation - critical for ensuring the device stays below its 150 °C limit during repetitive 600 W surges. Proper PCB pad design directly impacts SMBG33AHE3/52's sustained surge capability and long-term reliability.
SMBG33AHE3/52 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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 11.3A
- 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)
SMBG33AHE3/52 FAQ
1.How can I place an order for SMBG33AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG33AHE3/52 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 SMBG33AHE3/52 reliable?
The price and inventory of SMBG33AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG33AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG33AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG33AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG33AHE3/52?
SMBG33AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG33AHE3/52 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 SMBG33AHE3/52?
For technical support, including SMBG33AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG33AHE3/52 requirements.
6.How does Aetrix verify that SMBG33AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG33AHE3/52 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 SMBG33AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG33AHE3/52?
All SMBG33AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG33AHE3/52, 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 SMBG33AHE3/52 part is unused and in its original packaging.
Return procedure for SMBG33AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG33AHE3/52 Tags
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