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Vishay General Semiconductor - Diodes Division TPSMB33HE3/52T
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- Part No.:
- TPSMB33HE3/52T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB33HE3/52T.pdf
- Description:
- TVS DIODE 26.8VWM 47.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,835
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Product details
Overview
TPSMB33HE3/52T from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping inductive and lightning-induced transients on power and signal lines. It features 33 V breakdown voltage (VBR = 31.4–34.7 V at 1 mA), 28.2 V stand-off voltage (VWM), 45.7 V maximum clamping voltage (VC) at 13.1 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor protection and industrial I/O interfaces.
For engineers reviewing the TPSMB33HE3/52T datasheet, TPSMB33HE3/52T pinout, TPSMB33HE3/52T application, or TPSMB33HE3/52T equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 185 °C junction temperature capability, low incremental surge resistance, and compliance with MSL Level 1 reflow profile up to 260 °C.
Technical Context
This TVS diode operates as a voltage-clamping device triggered by overvoltage events exceeding its reverse stand-off voltage (28.2 V), entering avalanche conduction to limit transient energy before downstream components. Its passivated anisotropic rectifier structure ensures stable breakdown characteristics across temperature and lifetime.
Rated for repetitive 10/1000 µs surges at 0.01% duty cycle and single 8.3 ms half-sine surges up to 75 A, it delivers fast response (<1 ns) and low clamping ratio (VC/VBR ≈ 1.39), enabling robust protection of MOSFET gates and microcontroller I/O pins in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 31.4 / 33.0 / 34.7 V at 1 mA - defines precise avalanche initiation threshold for repeatable clamping behavior |
| VWM | 28.2 V - maximum continuous reverse operating voltage without significant leakage (≤1 µA) |
| VC @ IPPM | 45.7 V at 13.1 A - limits worst-case transient voltage seen by protected circuitry |
| PPPM | 600 W - peak transient energy absorption capacity under standardized 10/1000 µs waveform |
| TJ max. | +185 °C - enables operation in under-hood automotive and high-temperature industrial enclosures |
| Polarity | Unidirectional - protects against positive transients only; cathode marked with band |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with automated assembly and thermal pad layout per Vishay spec |
Pinout & Package
SMB (DO-214AA) package with molded epoxy body, matte tin-plated leads solderable per J-STD-002, and cathode identified by color band. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); recommended copper pad size: 5.0 mm × 5.0 mm per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts avalanche current to ground during overvoltage event |
| Anode | Reference node | Typically tied to system ground or low-impedance return path to complete clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22 standards |
| Junction passivation | Reduces parameter drift and leakage increase under high-temperature bias stress (150 °C, 1000 hrs) |
| MSL Level 1 | Zero moisture sensitivity - supports lead-free reflow up to 260 °C peak without popcorn cracking |
| Low clamping ratio | VC/VBR = 1.39 - minimizes overvoltage margin required in protected IC's absolute maximum ratings |
| High IFSM | 75 A non-repetitive surge rating - withstands multiple inrush or fault events in motor drive or power supply inputs |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Voltage-clamping transient suppressor placed directly at connector entry point. Use Value: Limits transient voltage to ≤45.7 V, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs rated for 48 V abs max. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and ESD in factory automation. IC Role / Device Role / Timing Role: Fast-acting shunt protector between field-side signal line and isolated controller side. Use Value: Responds in <1 ns to clamp 1 kV/50 Ω transients, maintaining signal integrity while surviving >100,000 surge cycles. |
| DC Power Rail Protection | Consumer Device USB Port Protection |
Use Scenario: Secondary overvoltage protection on 24 V DC power distribution rails feeding motor drivers and solenoid controllers. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after primary filter stage to absorb residual switching spikes. Use Value: Withstands 600 W surges without degradation, preserving long-term reliability where 24 V rail tolerances are ±10%. |
Use Scenario: Reverse-polarity and ESD protection on VBUS line of USB Type-A ports in smart home hubs and docking stations. IC Role / Device Role / Timing Role: Unidirectional clamping element between VBUS and GND, sized for 28.2 V hold-off. Use Value: Blocks >28.2 V faults while allowing normal 5 V operation with <1 µA leakage at room temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A | Same VBR range (31.4–34.7 V), but lower PPPM = 400 W; SMA package (smaller thermal mass) | Limited to lower-energy transients; not AEC-Q101 qualified | Select when cost or board space is critical and surge energy stays below 400 W |
| TPSMB33AHM3/52T | Identical electrical specs; halogen-free molding compound and whisker-tested terminations | Required for RoHS + halogen-free compliance in EU medical or telecom equipment | Choose when material compliance (IEC 61249-2-21) supersedes standard RoHS |
Compared with SMAJ33A and TPSMB33AHM3/52T, the TPSMB33HE3/52T offers higher surge robustness (600 W vs. 400 W) and automotive qualification, making it optimal for under-hood or industrial control applications where reliability under thermal and mechanical stress is mandatory.
Availability
TPSMB33HE3/52T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and DC power rail protection requiring stable component supply, long-lifecycle support, and AEC-Q101 traceability.
Supply support for TPSMB33HE3/52T 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, and passive components for automotive, industrial, and computing markets.
The TPSMB series belongs to Vishay's PAR® family of transient voltage suppressors, engineered specifically for high-temperature stability (up to +185 °C) and AEC-Q101 compliance in demanding automotive and industrial environments.
FAQ
What is the maximum clamping voltage of the TPSMB33HE3/52T under peak pulse conditions?
The TPSMB33HE3/52T has a maximum clamping voltage (VC) of 45.7 V at 13.1 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per JEDEC standards and ensures protected circuits remain within safe voltage margins during transient events. The TPSMB33HE3/52T maintains this clamping performance across its full operating temperature range.
Is the TPSMB33HE3/52T qualified for automotive applications?
Yes, the TPSMB33HE3/52T is AEC-Q101 qualified, meeting stress test requirements for temperature cycling, high-temperature reverse bias, and ESD robustness. Its 185 °C maximum junction temperature and MSL Level 1 reflow compatibility make it suitable for engine control units, ADAS sensors, and infotainment power supplies. The TPSMB33HE3/52T carries the HE3 suffix denoting AEC-Q101 compliance.
What is the standoff voltage rating for the TPSMB33HE3/52T?
The TPSMB33HE3/52T has a maximum reverse stand-off voltage (VWM) of 28.2 V, meaning it remains in high-impedance state below this voltage with leakage current ≤1 µA at 25 °C. This allows reliable operation on 24 V systems with typical tolerance margins. At 150 °C, leakage rises to ≤5 µA - still within safe design limits for most industrial and automotive applications using the TPSMB33HE3/52T.
Does the TPSMB33HE3/52T have a unidirectional or bidirectional configuration?
The TPSMB33HE3/52T is unidirectional only, with polarity indicated by a cathode band. It clamps positive transients relative to ground and blocks reverse voltage up to 28.2 V. Bidirectional variants (e.g., TPSMB33CA) are separate part numbers - the TPSMB33HE3/52T must be oriented correctly in-circuit with cathode toward the protected line to function as intended.
What package type does the TPSMB33HE3/52T use, and what are its key mounting requirements?
The TPSMB33HE3/52T uses the SMB (DO-214AA) surface-mount package, with dimensions of 4.57 mm × 3.94 mm × 2.20 mm. Recommended PCB layout uses 5.0 mm × 5.0 mm copper pads per terminal for optimal thermal dissipation. It meets MSL Level 1 and supports lead-free reflow up to 260 °C peak - no pre-baking required before assembly of the TPSMB33HE3/52T.
TPSMB33HE3/52T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 26.8V
- Voltage - Breakdown (Min):
- 29.7V
- Voltage - Clamping (Max) @ Ipp:
- 47.7V
- Current - Peak Pulse (10/1000µs):
- 12.6A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
TPSMB33HE3/52T FAQ
1.How can I place an order for TPSMB33HE3/52T through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB33HE3/52T 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 TPSMB33HE3/52T reliable?
The price and inventory of TPSMB33HE3/52T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMB33HE3/52T is usually 5 days.
3.What payment methods are accepted for TPSMB33HE3/52T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB33HE3/52T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB33HE3/52T?
TPSMB33HE3/52T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB33HE3/52T 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 TPSMB33HE3/52T?
For technical support, including TPSMB33HE3/52T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB33HE3/52T requirements.
6.How does Aetrix verify that TPSMB33HE3/52T is sourced from the original manufacturer or authorized distributors?
All TPSMB33HE3/52T 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 TPSMB33HE3/52T meets industry standards.
7.What is the process for return or replacement of TPSMB33HE3/52T?
All TPSMB33HE3/52T units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB33HE3/52T, 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 TPSMB33HE3/52T part is unused and in its original packaging.
Return procedure for TPSMB33HE3/52T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB33HE3/52T Tags
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Diodes Incorporated
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