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Vishay General Semiconductor - Diodes Division TPSMA33AHE3/5AT
- Part No.:
- TPSMA33AHE3/5AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA33AHE3/5AT.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,355
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Product details
Overview
TPSMA33AHE3/5AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 33 V nominal breakdown voltage (VBR = 31.4–34.7 V), 400 W peak pulse power (10/1000 µs), 45.7 V maximum clamping voltage at 8.8 A surge current, and operates up to TJ = 185 °C - suitable for automotive engine control units protecting MOSFET gate drivers against load dump.
For engineers reviewing the TPSMA33AHE3/5AT datasheet, TPSMA33AHE3/5AT pinout, TPSMA33AHE3/5AT application, or TPSMA33AHE3/5AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, 1.0 W steady-state power dissipation, and compatibility with PCB layouts using 5.0 mm × 5.0 mm copper pads per terminal.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve low incremental surge resistance and excellent clamping performance under repetitive 10/1000 µs transients. Its junction temperature rating of 185 °C enables operation in high-temperature automotive under-hood environments without derating penalties beyond those defined in Figure 2 of the datasheet.
The device is optimized for single-polarity transient suppression on DC rails and signal paths where reverse conduction must be blocked. It meets MSL Level 1 per J-STD-020, supports 260 °C lead-free reflow, and passes JESD201 Class 2 whisker testing - confirming suitability for long-life industrial and automotive production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 31.4 V / 33.0 V / 34.7 V - ensures reliable turn-on before downstream IC damage at 33 V nominal rail |
| VWM | 28.2 V - maximum continuous working voltage; sets safe margin below VBR for stable standby operation |
| VC @ IPPM | 45.7 V - clamping voltage at 8.8 A peak pulse; defines worst-case overvoltage seen by protected circuit |
| PPPM | 400 W - peak pulse power handling with 10/1000 µs waveform; validates robustness against ISO 7637-2 Pulse 1 & 2a |
| TJ max. | 185 °C - enables direct placement near hot components (e.g., power MOSFETs) without thermal derating in engine control modules |
| IR @ VWM | 1.0 µA - ultra-low leakage at rated standoff voltage; prevents battery drain in always-on automotive circuits |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with cathode band marking; compatible with automated pick-and-place |
Pinout & Package
SMA (DO-214AC) package with molded epoxy body, matte tin-plated leads, and visible cathode band. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for full 400 W pulse rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal PN junction | Connected to protected line; conducts during positive transients relative to anode |
| Anode | Cathode of internal PN junction | Typically tied to ground or lower-potential reference; completes clamping path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per stress test requirements |
| 185 °C junction rating | Eliminates need for thermal derating in under-hood applications up to +125 °C ambient with 60 K rise |
| 400 W peak pulse power (10/1000 µs) | Withstands ISO 7637-2 load-dump surges and inductive switching spikes without degradation |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage stress on protected MOSFETs or microcontrollers during transient events |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Suppresses load-dump transients (up to 35 V, 200 ms) on 24 V battery-fed ECUs in commercial vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between power input and ground to clamp overvoltage before it reaches DC/DC converter ICs. Use Value: Limits peak voltage to ≤45.7 V during 8.8 A surge, preventing latch-up or gate oxide rupture in downstream 40 V-rated MOSFETs. | Use Scenario: Protects analog output lines of pressure sensors in factory automation PLC I/O modules from ESD and relay-coil flyback. IC Role / Device Role / Timing Role: Fast-response TVS placed across sensor output and ground to shunt sub-100 ns ESD pulses before reaching ADC front-end. Use Value: Sub-1 ns response time and 1.0 µA leakage ensure signal integrity remains intact while meeting IEC 61000-4-2 Level 4 (15 kV air) immunity. |
| Telecom DC Power Input Protection | Consumer Device USB Port Surge Suppression |
Use Scenario: Guards 48 V PoE-powered network switches against lightning-induced surges on Ethernet data lines and auxiliary power rails. IC Role / Device Role / Timing Role: Standoff-rated TVS on secondary-side 12 V bias rail, coordinated with primary-side GDT for staged protection. Use Value: 28.2 V VWM provides headroom above 12 V nominal while enabling fast clamping at 45.7 V to protect isolated DC/DC controllers. | Use Scenario: Shields USB-C port VBUS line in portable monitors from hot-plug transients and charger-induced overshoot. IC Role / Device Role / Timing Role: Unidirectional TVS mounted directly at connector, referenced to system ground, to absorb 10/1000 µs surges before USB PD controller. Use Value: 400 W rating handles repeated 1 A/100 V surges per USB-IF compliance tests; RoHS-compliant HE3 suffix ensures environmental compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A | Same VBR range (31.4–34.7 V) but SMB (DO-214AA) package; 600 W PPPM; higher IPPM (13.3 A) | Requires larger PCB footprint; better suited for higher-energy transients where space allows | Select when surge energy exceeds 400 W capability and board layout permits larger package |
| TPSMA33AHM3/5AT | Identical electrical specs; halogen-free molding compound; same AEC-Q101 qualification | No functional difference; used where halogen-free compliance is mandated by OEM spec | Choose HM3 suffix only if halogen-free material requirement applies; otherwise HE3 offers identical performance |
Compared with TPSMA33AHE3/5AT, SMBJ33A delivers higher surge capacity in a larger package, while TPSMA33AHM3/5AT is a material-compliant drop-in variant - making HE3 the default choice for cost-sensitive, space-constrained automotive and industrial designs requiring proven AEC-Q101 reliability.
Availability
TPSMA33AHE3/5AT is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC I/O modules, and telecom power supply inputs requiring stable component supply with AEC-Q101 qualification and high-temperature operation.
Supply support for TPSMA33AHE3/5AT 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 reliability and high-temperature performance.
The TPSMA33AHE3/5AT belongs to Vishay's PAR® family of surface-mount TVS diodes, engineered specifically for robust transient suppression in automotive, industrial, and telecom systems where AEC-Q101 compliance and 185 °C operation are mandatory.
FAQ
What is the maximum clamping voltage of the TPSMA33AHE3/5AT at its rated peak pulse current?
The TPSMA33AHE3/5AT has a maximum clamping voltage (VC) of 45.7 V at its rated peak pulse current (IPPM) of 8.8 A, measured under the standard 10/1000 µs waveform condition. This value defines the upper voltage limit imposed on the protected circuit during a transient event and is critical for ensuring downstream components like 40 V MOSFETs remain within safe operating limits. The TPSMA33AHE3/5AT maintains this clamping performance across its full operating temperature range.
Is the TPSMA33AHE3/5AT qualified to AEC-Q101 standards?
Yes, the TPSMA33AHE3/5AT is AEC-Q101 qualified, as confirmed by Vishay's documentation for the TPSMA6.8A–TPSMA43A series. This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD, validating its suitability for automotive applications such as engine control units and body electronics. The HE3 suffix explicitly denotes AEC-Q101 qualification and RoHS compliance per the ordering information table.
What is the standoff voltage (VWM) of the TPSMA33AHE3/5AT, and why does it matter?
The standoff voltage (VWM) of the TPSMA33AHE3/5AT is 28.2 V - the maximum continuous DC or RMS voltage the device can withstand without entering avalanche conduction. This parameter ensures stable operation on 24 V automotive systems with normal ripple and tolerance margins, preventing unnecessary leakage or premature clamping. Exceeding VWM risks increased power dissipation and potential thermal runaway, so proper selection relative to system rail voltage is essential for reliable TPSMA33AHE3/5AT deployment.
Does the TPSMA33AHE3/5AT have bidirectional polarity?
No, the TPSMA33AHE3/5AT is unidirectional only, as stated in the Features section of the datasheet. It functions as a single-PN-junction avalanche diode with cathode band marking, conducting only when the cathode is more positive than the anode. For AC or bipolar transient protection, a separate bidirectional device (e.g., TPSMA33CA) would be required - the TPSMA33AHE3/5AT is not suitable for symmetrical surge suppression without external circuitry.
What package type does the TPSMA33AHE3/5AT use, and what are its mounting requirements?
The TPSMA33AHE3/5AT uses the SMA (DO-214AC) surface-mount package, with dimensions specified in the datasheet's Package Outline Dimensions table. To achieve its full 400 W peak pulse rating, it must be mounted on PCB copper pads measuring 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal, per Note (2) in the Maximum Ratings table. Smaller pads will reduce thermal dissipation and require derating of pulse power capability.
TPSMA33AHE3/5AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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):
- 8.8A
- Power - Peak Pulse:
- 400W
- 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-214AC (SMA)
TPSMA33AHE3/5AT FAQ
1.How can I place an order for TPSMA33AHE3/5AT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA33AHE3/5AT 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 TPSMA33AHE3/5AT reliable?
The price and inventory of TPSMA33AHE3/5AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA33AHE3/5AT is usually 5 days.
3.What payment methods are accepted for TPSMA33AHE3/5AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA33AHE3/5AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA33AHE3/5AT?
TPSMA33AHE3/5AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA33AHE3/5AT 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 TPSMA33AHE3/5AT?
For technical support, including TPSMA33AHE3/5AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA33AHE3/5AT requirements.
6.How does Aetrix verify that TPSMA33AHE3/5AT is sourced from the original manufacturer or authorized distributors?
All TPSMA33AHE3/5AT 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 TPSMA33AHE3/5AT meets industry standards.
7.What is the process for return or replacement of TPSMA33AHE3/5AT?
All TPSMA33AHE3/5AT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA33AHE3/5AT, 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 TPSMA33AHE3/5AT part is unused and in its original packaging.
Return procedure for TPSMA33AHE3/5AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA33AHE3/5AT Tags
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