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Vishay General Semiconductor - Diodes Division TPSMB33AHE3/5BT
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- Part No.:
- TPSMB33AHE3/5BT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB33AHE3/5BT.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,803
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Product details
Overview
TPSMB33AHE3/5BT from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) 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.
For engineers reviewing the TPSMB33AHE3/5BT datasheet, TPSMB33AHE3/5BT pinout, TPSMB33AHE3/5BT application, or TPSMB33AHE3/5BT equivalent, this device is selected for automotive-grade overvoltage protection where AEC-Q101 qualification, high-temperature stability, low clamping ratio, and robust surge handling are critical - especially in DC power input stages of ADAS modules, body control units, and industrial sensor interfaces.
Technical Context
The TPSMB33AHE3/5BT employs passivated anisotropic rectifier technology optimized for stable avalanche behavior under repetitive surge stress. Its unidirectional polarity enables forward-biased conduction during overvoltage events while maintaining low leakage (<1 µA at VWM) at 25 °C and <5 µA at 150 °C.
It delivers 13.1 A peak pulse current (IPPM) with a 10/1000 µs waveform, clamping to ≤45.7 V, and exhibits a temperature coefficient of VBR of +0.089 %/°C - enabling predictable voltage shift across its -65 °C to +185 °C operating range without derating ambiguity.
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 reliable overvoltage triggering |
| VWM | 28.2 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 45.7 V at 13.1 A - clamped voltage seen by protected circuit during worst-case 600 W transient |
| PPPM | 600 W (10/1000 µs) - surge energy absorption capacity compatible with ISO 7637-2 Pulse 1/2a/5a test levels |
| TJ max. | +185 °C - supports under-hood automotive placement without thermal derating penalties |
| Polarity | Unidirectional - blocks reverse voltage, conducts forward surge current to ground |
| Package | SMB (DO-214AA) - industry-standard SMD outline with 0.220" × 0.130" footprint and MSL Level 1 rating |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode indicated by molded band. Dimensions: 4.57 mm × 3.30 mm × 2.20 mm (L × W × H). Matte tin-plated leads, J-STD-002 solderable, JESD201 Class 2 whisker compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to system ground or low-impedance return path; carries full transient current during clamping |
| Anode | Protected line connection | Connected to DC rail or signal line being safeguarded; reverse-biased during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD |
| Junction passivation optimized design | Enables stable VBR over lifetime and eliminates parametric drift under thermal cycling |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., load dump, relay bounce) |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without moisture sensitivity concerns |
| 185 °C TJ capability | Permits direct placement near high-power components (e.g., motor drivers, DC/DC converters) without heatsinking |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protecting 24 V supply inputs of body control modules against ISO 7637-2 load dump pulses (up to 60 V, 400 ms). IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and input filter capacitor to clamp transients before they reach LDOs or microcontrollers. Use Value: Clamps to 45.7 V at 13.1 A, limiting stress on downstream 36 V-rated regulators and ensuring ASIL-B functional safety compliance. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) of pressure sensors exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between signal and ground to shunt fast transients without distorting milliamp-level signals. Use Value: Sub-1 µA leakage at 28.2 V preserves loop accuracy; 45.7 V clamping prevents op-amp saturation and ADC overrange in PLC I/O modules. |
| Telecom DC Power Feeding | Consumer Appliance Motor Driver Protection |
Use Scenario: Overvoltage suppression on PoE-powered equipment DC inputs subjected to induced surges from nearby AC wiring. IC Role / Device Role / Timing Role: Primary surge clamp on 48 V DC feed line upstream of DC/DC converter, coordinated with secondary TVS at converter input. Use Value: 600 W rating handles IEEE 802.3bt surge profiles; 185 °C rating ensures reliability in sealed telecom enclosures with limited airflow. | Use Scenario: Suppressing back-EMF spikes generated by brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Mounted across motor terminals to absorb inductive kickback during PWM commutation and switch-off events. Use Value: 75 A non-repetitive surge current rating withstands repeated motor stall conditions; unidirectional polarity avoids interfering with H-bridge control logic. |
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 and IPPM = 8.7 A; SMB package identical | Limited to lower-energy transients (e.g., ESD-only); not rated for automotive load dump per ISO 7637-2 | Select SMAJ33A only when cost sensitivity outweighs surge margin and AEC-Q101 is not required. |
| TPSMB33AHM3/5BT | Identical electrical specs; HM3 suffix adds halogen-free molding compound and same AEC-Q101 qualification | Required for RoHS+halogen-free compliance mandates in EU automotive Tier 1 BOMs | Choose TPSMB33AHM3/5BT when material compliance (IEC 61249-2-21) is contractually enforced. |
Compared with SMAJ33A and TPSMB33AHM3/5BT, the TPSMB33AHE3/5BT provides the optimal balance of 600 W surge capacity, AEC-Q101 validation, and RoHS compliance - making it the preferred choice for production automotive and industrial designs where both reliability and regulatory alignment are mandatory.
Availability
TPSMB33AHE3/5BT is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom power supplies, and consumer appliance motor controls requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for TPSMB33AHE3/5BT 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, MOSFETs, and protection devices with emphasis on high-reliability, high-temperature, and automotive-qualified solutions.
The TPSMB series belongs to Vishay's PAR® (Protection and Regulation) transient suppressor family, engineered specifically for robust, high-energy surge immunity in harsh environments - including under-hood automotive, factory automation, and outdoor telecom infrastructure.
FAQ
What is the clamping voltage of the TPSMB33AHE3/5BT at its rated peak pulse current?
The TPSMB33AHE3/5BT has a maximum clamping voltage (VC) of 45.7 V when subjected to its rated 13.1 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This value is measured under defined test conditions per ANSI/IEEE C62.35 and ensures predictable voltage limiting during surge events. The TPSMB33AHE3/5BT maintains this clamping performance across its full operating temperature range due to its +0.089 %/°C VBR coefficient.
Is the TPSMB33AHE3/5BT qualified for automotive applications?
Yes, the TPSMB33AHE3/5BT is AEC-Q101 qualified, as confirmed by Vishay's official documentation and ordering code suffix "HE3". This qualification covers stress tests including high-temperature operating life, temperature cycling, and electrostatic discharge - validating its suitability for automotive powertrain, chassis, and body electronics. The TPSMB33AHE3/5BT also supports junction temperatures up to +185 °C, meeting under-hood thermal requirements.
What does the "HE3" suffix mean in TPSMB33AHE3/5BT?
The "HE3" suffix in TPSMB33AHE3/5BT indicates RoHS-compliant construction and AEC-Q101 qualification. It denotes that the device uses matte tin-plated leads, meets JESD201 Class 2 whisker resistance, and is packaged in MSL Level 1-compliant SMB (DO-214AA) molding compound. The "5BT" denotes tape-and-reel packaging: 7" reel, 750 units per reel, per Vishay's ordering convention. The TPSMB33AHE3/5BT is not halogen-free; for that specification, the HM3 variant is used.
How does the TPSMB33AHE3/5BT compare to bidirectional TVS diodes in circuit protection?
The TPSMB33AHE3/5BT is unidirectional, meaning it functions as a reverse-biased avalanche diode during overvoltage events and blocks forward voltage up to ~1.5 V. Unlike bidirectional TVS diodes, it does not protect against positive-going transients on grounded lines - but offers lower leakage (<1 µA at VWM) and tighter VBR tolerance. The TPSMB33AHE3/5BT is ideal for DC power rail protection where polarity is fixed and low standby current is critical.
What is the maximum surge current the TPSMB33AHE3/5BT can handle in a single event?
The TPSMB33AHE3/5BT is rated for a non-repetitive peak forward surge current (IFSM) of 75 A, measured using an 8.3 ms single half-sine waveform. This rating applies to isolated surge events such as motor commutation spikes or accidental short circuits. For repetitive transients, the device is specified for 600 W peak pulse power with a 10/1000 µs waveform at 0.01 % duty cycle - a condition under which the TPSMB33AHE3/5BT delivers 13.1 A IPPM.
TPSMB33AHE3/5BT 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 (SMBJ)
TPSMB33AHE3/5BT FAQ
1.How can I place an order for TPSMB33AHE3/5BT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB33AHE3/5BT 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 TPSMB33AHE3/5BT reliable?
The price and inventory of TPSMB33AHE3/5BT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMB33AHE3/5BT is usually 5 days.
3.What payment methods are accepted for TPSMB33AHE3/5BT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB33AHE3/5BT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB33AHE3/5BT?
TPSMB33AHE3/5BT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB33AHE3/5BT 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 TPSMB33AHE3/5BT?
For technical support, including TPSMB33AHE3/5BT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB33AHE3/5BT requirements.
6.How does Aetrix verify that TPSMB33AHE3/5BT is sourced from the original manufacturer or authorized distributors?
All TPSMB33AHE3/5BT 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 TPSMB33AHE3/5BT meets industry standards.
7.What is the process for return or replacement of TPSMB33AHE3/5BT?
All TPSMB33AHE3/5BT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB33AHE3/5BT, 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 TPSMB33AHE3/5BT part is unused and in its original packaging.
Return procedure for TPSMB33AHE3/5BT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB33AHE3/5BT Tags
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