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Vishay General Semiconductor - Diodes Division SMBG33HE3/52
- Part No.:
- SMBG33HE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG33HE3/52.pdf
- Description:
- TVS DIODE 33VWM 59VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,172
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Product details
Overview
SMBG33HE3/52 from Vishay General Semiconductor is a uni-directional transient voltage suppressor (TVS) diode in DO-215AA (SMBG) package, designed for robust overvoltage protection of power rails and signal lines. It features 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), clamping voltage of 53.3 V at 11.3 A, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMBG33HE3/52 datasheet, SMBG33HE3/52 pinout, SMBG33HE3/52 application, or SMBG33HE3/52 equivalent, key selection criteria include clamping performance under 10/1000 µs surge, junction temperature derating above 25 °C, unidirectional polarity marking, and RoHS-compliant AEC-Q101 qualification for harsh-environment designs.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable leakage and long-term reliability under repetitive transients.
Thermal design relies on RθJA = 100 °C/W (on 5.0 mm × 5.0 mm copper pads) and maximum junction temperature of 150 °C; derating begins above 25 °C ambient per Figure 2. The device supports 100 A non-repetitive forward surge (8.3 ms half-sine) only in uni-directional configuration.
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 defining protection threshold tolerance |
| VC @ IPPM | 53.3 V at 11.3 A - Clamped voltage during 10/1000 µs surge; determines protected circuit's maximum stress level |
| PPPM | 600 W - Peak surge power handling with 10/1000 µs waveform; defines single-event energy absorption capacity |
| ID @ VWM | 1.0 µA - Reverse leakage at rated stand-off; ensures minimal quiescent power loss in high-impedance circuits |
| TJ max. | +150 °C - Maximum junction temperature; sets thermal margin for under-hood or industrial environments |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
DO-215AA (SMBG) surface-mount package: low-profile, gull-wing leads, matte tin-plated terminals solderable per J-STD-002/JESD 22-B102; cathode indicated by band on case; MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in uni-directional configuration |
| Cathode (banded end) | Reverse-biased clamping terminal | Connected to protected line (e.g., 33 V rail); avalanche conduction occurs when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 33 V systems without cascading failure |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring extended temperature and life-cycle reliability |
| Glass passivated junction | Reduces parameter drift over time and improves stability under humidity and thermal cycling stress |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., load dump, inductive kick) |
| MSL Level 1 rating | Permits standard SMT reflow without moisture sensitivity concerns-no baking required prior to assembly |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 33 V battery-fed ECUs against load dump transients up to 60 V and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Uni-directional shunt TVS placed between 33 V rail and chassis ground. Use Value: Limits rail voltage to ≤53.3 V during 11.3 A surge, preventing damage to 36 V-rated DC-DC controllers and microcontrollers. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) in factory-floor pressure/temperature sensors. IC Role / Device Role / Timing Role: Low-leakage (1.0 µA) clamping device mounted at connector interface. Use Value: Maintains signal integrity with sub-µA bias error while suppressing ±1 kV EFT bursts per IEC 61000-4-4. |
| Telecom DC Power Input Stage | Consumer Device USB VBUS Line |
Use Scenario: Secondary overvoltage protection on -48 V telecom rectifier outputs subject to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS in series with primary MOV, absorbing residual energy after bulk clamping. Use Value: Provides precise 33 V clamping window with <10 ns response, complementing slower MOV-based front-end protection. |
Use Scenario: VBUS line protection in portable monitors or docking stations exposed to hot-plug and ESD events. IC Role / Device Role / Timing Role: Fast-response shunt element placed upstream of USB PD controller and port switch. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) to <53.3 V within nanoseconds, preserving USB 2.0 signal integrity and PHY survival. |
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 DO-214AA (SMB) package but lower PPPM (600 W vs. SMBG's 600 W), same AEC-Q101 qualification | Identical clamping performance (VC = 53.3 V), but SMBJ has higher thermal resistance (RθJA = 110 °C/W vs. 100 °C/W) | Select SMBJ33A-E3/52 only if existing PCB uses DO-214AA footprint and thermal margin ≥10 °C is available. |
| SMCJ33AHE3/52 | Higher power rating (1500 W), DO-214AB (SMC) package, same VWM/VBR/VC specs, AEC-Q101 qualified | Supports 3× higher surge energy; requires larger PCB pad area (7.1 mm × 6.2 mm vs. SMBG's 5.9 mm × 4.6 mm) | Choose SMCJ33AHE3/52 when system-level testing reveals insufficient margin with 600 W rating-e.g., in 24 V/33 V hybrid power architectures. |
Compared with SMBJ33A-E3/52, SMBG33HE3/52 offers lower thermal resistance for tighter ambient temperature envelopes; versus SMCJ33AHE3/52, it delivers space-constrained 600 W protection without redesigning layout or increasing board area.
Availability
SMBG33HE3/52 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom power supplies, and consumer USB power delivery systems requiring stable component supply across production lifecycles.
Supply support for SMBG33HE3/52 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 automotive-grade validation.
The SMBG series targets high-reliability transient suppression in space-constrained, thermally demanding applications-designed specifically for AEC-Q101 compliance and robust surge immunity in automotive and industrial power domains.
FAQ
What is the clamping voltage of SMBG33HE3/52 and how is it measured?
The SMBG33HE3/52 has a maximum clamping voltage (VC) of 53.3 V, measured at 11.3 A peak pulse current using a 10/1000 µs waveform per Figure 1 in Vishay document 88456. This value represents the upper limit of voltage seen by protected circuitry during standardized surge events and is confirmed under test conditions with 0.2" × 0.2" copper pads per JEDEC standards.
Is SMBG33HE3/52 suitable for bi-directional protection applications?
No, SMBG33HE3/52 is a uni-directional TVS diode, as indicated by its "A" suffix and cathode band marking. Bi-directional variants use the "CA" suffix (e.g., SMBG33CA). Using SMBG33HE3/52 in bi-directional configurations would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit.
Does SMBG33HE3/52 require derating at elevated ambient temperatures?
Yes, SMBG33HE3/52 must be derated above TA = 25 °C per Figure 2 in the Vishay datasheet. At 85 °C ambient, its peak pulse power capability drops to approximately 40% of the rated 600 W due to thermal limitations; designers must verify junction temperature remains below 150 °C using RθJA = 100 °C/W and actual PCB copper area.
What does the "HE3" suffix indicate in SMBG33HE3/52?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. It distinguishes this automotive-grade variant from commercial "E3" versions (e.g., SMBG33A-E3/52), confirming enhanced reliability for automotive and industrial applications where long-term solder joint integrity is critical.
Can SMBG33HE3/52 replace SMBG33A-E3/52 in an existing design?
Yes, SMBG33HE3/52 is a direct replacement for SMBG33A-E3/52 in terms of electrical specs, package, and pinout-but adds AEC-Q101 qualification and Class 2 whisker resistance. No layout changes are needed; however, users should confirm that the enhanced reliability attributes align with their application's qualification requirements before migration.
SMBG33HE3/52 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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 59V
- Current - Peak Pulse (10/1000µs):
- 10.2A
- 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)
SMBG33HE3/52 FAQ
1.How can I place an order for SMBG33HE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG33HE3/52 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 SMBG33HE3/52 reliable?
The price and inventory of SMBG33HE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG33HE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG33HE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG33HE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG33HE3/52?
SMBG33HE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG33HE3/52 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 SMBG33HE3/52?
For technical support, including SMBG33HE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG33HE3/52 requirements.
6.How does Aetrix verify that SMBG33HE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG33HE3/52 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 SMBG33HE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG33HE3/52?
All SMBG33HE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG33HE3/52, 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 SMBG33HE3/52 part is unused and in its original packaging.
Return procedure for SMBG33HE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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