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Vishay General Semiconductor - Diodes Division TPSMB33A-1BHE3/5BT
- Part No.:
- TPSMB33A-1BHE3/5BT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB33A-1BHE3/5BT.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,580
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Product details
Overview
TPSMB33A-1BHE3/5BT from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode designed for clamping inductive switching surges and lightning-induced transients on power rails and signal lines. It features a 33 V breakdown voltage (VBR = 31.4–34.7 V at IT = 1 mA), 28.2 V stand-off voltage (VWM), 45.7 V maximum clamping voltage (VC) at 13.1 A peak pulse current, 600 W peak pulse power (10/1000 µs), and operates up to +185 °C junction temperature - used in automotive power supply protection and industrial sensor interface circuits.
For engineers reviewing the TPSMB33A-1BHE3/5BT datasheet, TPSMB33A-1BHE3/5BT pinout, TPSMB33A-1BHE3/5BT application, or TPSMB33A-1BHE3/5BT equivalent, key selection criteria include unidirectional polarity, SMB (DO-214AA) package compatibility, AEC-Q101 qualification status, clamping performance under 10/1000 µs surge, and thermal derating above 25 °C ambient.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its junction design enables reliable operation at TJ = 185 °C and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
The device delivers fast response time and excellent clamping ratio (VC/VBR ≈ 1.39), with cathode-band polarity marking and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 31.4 / 33.0 / 34.7 V at IT = 1 mA - defines precise voltage threshold where avalanche conduction begins |
| VWM | 28.2 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VC @ IPPM | 45.7 V at 13.1 A (10/1000 µs) - clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 600 W - peak surge power handling capability under standardized 10/1000 µs waveform |
| IFSM | 75 A - non-repetitive forward surge rating (8.3 ms half-sine), critical for inrush and fault tolerance |
| TJ max. | +185 °C - enables use in under-hood automotive and high-ambient industrial environments |
| αT | 0.089 %/°C - temperature coefficient of VBR, used to calculate breakdown shift over operating range |
Pinout & Package
Package: SMB (DO-214AA) - surface-mount plastic case with cathode band marking; dimensions 4.57 mm × 3.94 mm × 2.20 mm; UL 94 V-0 rated molding compound; RoHS-compliant and AEC-Q101 qualified (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or low-side reference | Completes conduction path during transient clamping; must be routed with low-inductance ground plane |
| Cathode | Current exit terminal in forward bias; marked by color band; connected to protected line | Receives surge energy from protected node; polarity-sensitive placement prevents misapplication |
Key Features
| Feature | Design Value |
|---|---|
| Passivated anisotropic rectifier technology | Enables stable VBR and low leakage (<1 μA at VWM) across -65 °C to +185 °C |
| AEC-Q101 qualification (HE3 suffix) | Validated for automotive powertrain and body electronics per stress test requirements |
| 600 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out |
| MSL Level 1, 260 °C peak reflow | Allows single-pass lead-free assembly without moisture sensitivity concerns |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage stress on downstream ICs such as MCUs and CAN transceivers |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp positive-going surges. Use Value: Withstands 75 A IFSM and clamps to ≤45.7 V, preventing damage to 36 V-rated DC-DC converters and microcontrollers. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS on 0–5 V or 4–20 mA output lines to limit voltage excursion during fast transients. Use Value: Sub-1 ns response ensures clamping before sensitive op-amp inputs saturate; VC < 46 V preserves ADC input range integrity. |
| Consumer Power Adapter Input Stage | Telecom DSL Line Surge Suppression |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters subjected to lightning-induced surges on DC output. IC Role / Device Role / Timing Role: Standoff-rated TVS across regulated 12 V or 19 V output to absorb repetitive 10/1000 µs pulses. Use Value: 600 W PPPM and 0.01 % duty cycle rating enable robust multi-event protection without thermal runaway. | Use Scenario: Primary protection for ADSL/VDSL line drivers interfacing with outdoor copper pairs vulnerable to induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS on line driver outputs to shunt common-mode transients toward ground. Use Value: 28.2 V VWM avoids false triggering during normal line signaling; 45.7 V VC stays below driver absolute maximum ratings. |
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 | Same SMB package, identical VBR (31.4–34.7 V), but lower PPPM = 600 W (same rating), no AEC-Q101 qualification stated | Not automotive-qualified; suitable for commercial/industrial only | Select SMBJ33A if AEC-Q101 compliance is not required and cost optimization is prioritized |
| TPSMB33CA | Bi-directional variant (VBR ±33 V); same package, PPPM, and AEC-Q101 qualification; higher IR at VWM | Required for AC-coupled or bidirectional signal lines (e.g., RS-485, USB D+/D−) | Choose TPSMB33CA only when protecting symmetrical signals subject to both polarities of surge |
Compared with SMBJ33A and TPSMB33CA, the TPSMB33A-1BHE3/5BT uniquely combines AEC-Q101 qualification, unidirectional clamping, and guaranteed 185 °C operation - making it optimal for automotive power domain protection where reliability and thermal margin are critical.
Availability
TPSMB33A-1BHE3/5BT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom line card designs requiring stable component supply, long-term lifecycle support, and traceable AEC-Q101 qualified parts.
Supply support for TPSMB33A-1BHE3/5BT 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, TVS devices, and optoelectronics with emphasis on high-reliability and automotive-grade solutions.
The TPSMB series is part of Vishay's PAR® (Protected Avalanche Rectifier) platform, engineered specifically for robust transient suppression in harsh environments including automotive under-hood, industrial automation, and infrastructure equipment.
FAQ
What is the exact breakdown voltage range for TPSMB33A-1BHE3/5BT?
The TPSMB33A-1BHE3/5BT has a specified breakdown voltage VBR range of 31.4 V to 34.7 V at test current IT = 1 mA, measured per ANSI/IEEE C62.35. This range reflects manufacturing tolerance and ensures consistent clamping behavior across production lots. The nominal value is 33.0 V, and the parameter is validated at TA = 25 °C unless otherwise noted in the Vishay datasheet 88406.
Is TPSMB33A-1BHE3/5BT qualified for automotive applications?
Yes, TPSMB33A-1BHE3/5BT is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's datasheet 88406. It meets stress test requirements for automotive electronics including temperature cycling, humidity bias, and mechanical shock. The device supports junction temperatures up to +185 °C, making it suitable for engine control modules, body controllers, and ADAS power supplies.
What does the "-1B" in TPSMB33A-1BHE3/5BT signify?
The "-1B" in TPSMB33A-1BHE3/5BT denotes the revision code and packaging configuration: "1B" indicates the specific manufacturing revision and tape-and-reel orientation per Vishay's ordering nomenclature. It is not a functional variant - electrical and thermal specifications remain identical to other TPSMB33A-HE3 variants. Full ordering details are provided in the "Ordering Information" section of datasheet 88406.
Can TPSMB33A-1BHE3/5BT be used in bidirectional signal protection?
No, TPSMB33A-1BHE3/5BT is unidirectional only, as explicitly stated in the Vishay datasheet. It conducts only during positive surges relative to its cathode. For bidirectional protection (e.g., RS-485, USB, or AC lines), the bi-directional variant TPSMB33CA must be used instead. Using TPSMB33A-1BHE3/5BT on bidirectional paths risks failure during negative transients.
What is the maximum clamping voltage of TPSMB33A-1BHE3/5BT under surge conditions?
The maximum clamping voltage VC of TPSMB33A-1BHE3/5BT is 45.7 V at IPPM = 13.1 A using the standard 10/1000 µs waveform. This value is measured per figure 1 in datasheet 88406 and represents the peak voltage imposed on the protected circuit during worst-case transient events. It remains stable across temperature due to the device's low αT (0.089 %/°C).
TPSMB33A-1BHE3/5BT 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):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 13.1A
- 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 (SMB)
TPSMB33A-1BHE3/5BT FAQ
1.How can I place an order for TPSMB33A-1BHE3/5BT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB33A-1BHE3/5BT 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 TPSMB33A-1BHE3/5BT reliable?
The price and inventory of TPSMB33A-1BHE3/5BT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMB33A-1BHE3/5BT is usually 5 days.
3.What payment methods are accepted for TPSMB33A-1BHE3/5BT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB33A-1BHE3/5BT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB33A-1BHE3/5BT?
TPSMB33A-1BHE3/5BT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB33A-1BHE3/5BT 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 TPSMB33A-1BHE3/5BT?
For technical support, including TPSMB33A-1BHE3/5BT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB33A-1BHE3/5BT requirements.
6.How does Aetrix verify that TPSMB33A-1BHE3/5BT is sourced from the original manufacturer or authorized distributors?
All TPSMB33A-1BHE3/5BT 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 TPSMB33A-1BHE3/5BT meets industry standards.
7.What is the process for return or replacement of TPSMB33A-1BHE3/5BT?
All TPSMB33A-1BHE3/5BT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB33A-1BHE3/5BT, 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 TPSMB33A-1BHE3/5BT part is unused and in its original packaging.
Return procedure for TPSMB33A-1BHE3/5BT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB33A-1BHE3/5BT Tags
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