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Vishay General Semiconductor - Diodes Division SMBG33A-E3/52
- Part No.:
- SMBG33A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG33A-E3/52.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,254
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Product details
Overview
SMBG33A-E3/52 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 - used to safeguard MOSFETs, ICs, and sensor signal lines in automotive and industrial power systems.
For engineers reviewing the SMBG33A-E3/52 datasheet, SMBG33A-E3/52 pinout, SMBG33A-E3/52 application, or SMBG33A-E3/52 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on standard 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below 33 V and rapidly transitions to low-impedance conduction above its 36.7 V minimum breakdown threshold. Its glass-passivated junction ensures stable leakage performance (<1.0 μA at VWM) and fast response time (<1 ns), critical for suppressing ESD and inductive switching transients.
The SMBG33A-E3/52 is rated for 100 A non-repetitive forward surge current (8.3 ms half-sine), exhibits 100 °C/W junction-to-ambient thermal resistance, and meets J-STD-020 MSL Level 1 with 260 °C reflow peak - confirming suitability for high-reliability surface-mount assembly without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - precise breakdown range defining turn-on consistency across production lots |
| VC @ IPPM | 53.3 V at 11.3 A - clamping voltage limiting downstream component stress during 10/1000 μs surge events |
| PPPM | 600 W - peak pulse power handling capability under standardized transient conditions |
| IFSM | 100 A - surge current rating for 8.3 ms half-sine wave, supporting motor driver and relay coil suppression |
| 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 preservation in high-impedance circuits |
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; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to circuit ground or lower-potential node when protecting positive rail |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to protected line (e.g., 33 V supply rail) to clamp transients to ground |
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 over lifetime and temperature extremes |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow without baking or special handling requirements |
| 600 W 10/1000 μs pulse rating | Provides margin against ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surge events |
| Low profile SMBG package | Reduces board space vs. SMA/SMB while maintaining thermal performance via 5.0 mm × 5.0 mm pad layout |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V power rails in body control modules from load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient energy to ground during alternator load dump events. Use Value: Limits rail voltage to ≤53.3 V during 600 W surges, preventing damage to MCU power supplies and CAN transceivers. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Fast-response shunt protector placed at connector entry point before signal conditioning circuitry. Use Value: Sub-1 ns response and <1.0 μA leakage preserve signal fidelity while meeting IEC 61000-4-2 Level 4 (15 kV air) immunity. |
| DC Motor Drive Circuits | Telecom Power Supply Input Stage |
Use Scenario: Suppressing back-EMF spikes generated by brushed DC motors in HVAC actuators and window lifters. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing inductive energy during MOSFET turn-off. Use Value: Withstands 100 A 8.3 ms surge and clamps at 53.3 V, ensuring gate driver ICs remain within safe operating area. | Use Scenario: Front-end protection for 48 V telecom rectifier inputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping element in multi-stage protection network ahead of MOV and GDT stages. Use Value: Provides precise 33 V standoff and low clamping ratio (VC/VBR ≈ 1.4), reducing let-through voltage to downstream regulators. |
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 SMB package but lower 400 W PPPM; VC = 53.3 V at 7.5 A | Limited to lower-energy transients; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and 600 W surge margin |
| SMCJ33A-E3/52 | Higher 1500 W PPPM in larger SMC (DO-214AB) package; same VWM/VC | Requires more PCB area; better suited for primary-level AC/DC input protection | Choose when system-level surge tests exceed IEC 61000-4-5 Line-to-Ground 4 kV requirements |
Compared with SMBJ33A-E3/52 and SMCJ33A-E3/52, the SMBG33A-E3/52 uniquely balances 600 W surge capacity, AEC-Q101 compliance, and compact SMBG footprint - making it optimal for space-constrained automotive ECUs where both reliability and board density matter.
Availability
SMBG33A-E3/52 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, DC motor drive circuits, and telecom power supply input stage applications requiring stable component supply and long-term lifecycle support.
Supply support for SMBG33A-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, rectifiers, MOSFETs, and protection devices with emphasis on automotive, industrial, and computing applications.
The SMBG series was engineered specifically for high-reliability surface-mount transient suppression in harsh environments, combining AEC-Q101 qualification, low-profile packaging, and consistent clamping performance across temperature and life cycle.
FAQ
What is the polarity configuration of SMBG33A-E3/52?
The SMBG33A-E3/52 is a unidirectional TVS diode, with polarity indicated by a cathode band on the package. During normal operation, it blocks reverse current up to 33 V; when a transient exceeds its breakdown voltage, it conducts from cathode to anode to clamp the voltage. This configuration is essential for protecting positive supply rails - the cathode connects to the protected line and the anode to ground. The SMBG33A-E3/52 does not conduct in reverse bias beyond its specified leakage.
Is SMBG33A-E3/52 qualified for automotive use?
Yes, the SMBG33A-E3/52 is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JEDEC standards. Its construction - glass-passivated junction, MSL Level 1 rating, and 150 °C maximum junction temperature - supports deployment in engine control units, body electronics, and ADAS modules. The "HE3" variant explicitly denotes AEC-Q101 qualification, but the E3/52 suffix also corresponds to the same qualified die set per Vishay's ordering matrix.
What is the clamping voltage of SMBG33A-E3/52 under surge conditions?
The SMBG33A-E3/52 has a maximum clamping voltage (VC) of 53.3 V at 11.3 A peak pulse current (IPPM) using the 10/1000 μs waveform. This value is measured after the device fully transitions into avalanche conduction and represents the upper limit of voltage imposed on the protected circuit during standardized surge events. Clamping performance is guaranteed across -55 °C to +150 °C, with typical VC remaining within ±5 % of 53.3 V under production lot variation.
How does SMBG33A-E3/52 compare to bidirectional TVS diodes like SMBG33CA?
The SMBG33A-E3/52 is unidirectional and intended for DC rail protection where polarity is fixed, whereas SMBG33CA is bidirectional and suited for AC signal lines or differential buses like RS-485. SMBG33A-E3/52 offers lower leakage (<1.0 μA) and higher surge current rating (11.3 A vs. ~10.5 A for SMBG33CA at same VC), but cannot protect against negative-going transients on positive rails. For single-ended 33 V supply protection, SMBG33A-E3/52 delivers superior precision and efficiency - confirmed by its dedicated cathode marking and absence of symmetry in VBR test data.
What PCB layout guidance applies to SMBG33A-E3/52 for optimal thermal and electrical performance?
Vishay specifies mounting SMBG33A-E3/52 on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 600 W pulse power and 100 °C/W thermal resistance. Traces to the device must be short and wide to minimize inductance - especially on the cathode path - ensuring sub-1 ns response. Avoid thermal reliefs on pads; use solid copper pours connected to internal ground planes. The SMBG33A-E3/52's DO-215AA outline requires 0.130"–0.155" pad length and 0.077"–0.095" pad width per footprint drawing 88456, page 5.
SMBG33A-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:
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG33A-E3/52 FAQ
1.How can I place an order for SMBG33A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG33A-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 SMBG33A-E3/52 reliable?
The price and inventory of SMBG33A-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 SMBG33A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG33A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG33A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG33A-E3/52?
SMBG33A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG33A-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 SMBG33A-E3/52?
For technical support, including SMBG33A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG33A-E3/52 requirements.
6.How does Aetrix verify that SMBG33A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG33A-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 SMBG33A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG33A-E3/52?
All SMBG33A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG33A-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 SMBG33A-E3/52 part is unused and in its original packaging.
Return procedure for SMBG33A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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