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Vishay General Semiconductor - Diodes Division TPSMA33AHE3_A/I
- Part No.:
- TPSMA33AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA33AHE3_A/I.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,558
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Product details
Overview
TPSMA33AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features 33 V nominal breakdown voltage (VBR), 45.7 V maximum clamping voltage (VC) at 8.8 A peak pulse current, 400 W peak pulse power (10/1000 µs), 185 °C max junction temperature, and AEC-Q101 qualification - used in automotive power rail protection and industrial sensor interface circuits.
For engineers reviewing the TPSMA33AHE3_A/I datasheet, TPSMA33AHE3_A/I pinout, TPSMA33AHE3_A/I application, or TPSMA33AHE3_A/I equivalent, key selection criteria include unidirectional polarity, 28.2 V stand-off voltage (VWM), low 0.089 %/°C VBR temperature coefficient, 1.0 µA reverse leakage at VWM, and MSL Level 1 reflow compatibility up to 260 °C.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology with junction passivation optimized for high-temperature stability and reliability. Its 185 °C maximum junction temperature rating supports operation in under-hood automotive environments and high-power industrial enclosures where thermal derating is critical.
The device delivers 400 W peak pulse power handling per 10/1000 µs waveform with 0.01 % duty cycle, and exhibits fast response time (<1 ns) and low incremental surge resistance - enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients on DC power rails and analog signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 31.4 V / 33.0 V / 34.7 V - defines precise voltage threshold at which avalanche conduction begins under 1.0 mA test current |
| VWM | 28.2 V - maximum continuous reverse operating voltage before significant leakage; sets safe DC bias margin |
| VC @ IPPM | 45.7 V at 8.8 A - clamped voltage during 400 W transient event; determines protected circuit's worst-case overvoltage exposure |
| PPPM | 400 W - peak pulse power capability with 10/1000 µs waveform; defines transient energy absorption capacity |
| TJ max | +185 °C - enables use in high-ambient-temperature locations without thermal shutdown or degradation |
| Leakage @ VWM | 1.0 µA - ensures minimal standby power loss and signal integrity in low-current sensor interfaces |
| Temp. Coeff. αT | 0.089 %/°C - quantifies VBR drift with temperature; critical for precision clamping across wide ambient ranges |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional polarity with cathode band marking. Molded compound meets UL 94 V-0; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal avalanche junction | Connected to protected line; conducts when transient exceeds VBR; requires correct polarity placement on PCB |
| Anode | Cathode of internal avalanche 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 testing per JEDEC standards |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow without moisture-induced damage or delamination |
| 185 °C TJ max | Supports sustained operation in engine control units, motor drivers, and industrial PLC modules with minimal derating |
| Low VC/VBR ratio (1.38) | Indicates efficient clamping performance - tighter voltage margin between trigger and clamp reduces stress on downstream ICs |
| 0.064 g unit weight | Minimizes mechanical loading on PCB traces and connectors in vibration-prone automotive and transportation systems |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
|
Use Scenario: Suppressing load-dump transients (up to 35 V, 100 ms) and alternator ripple on 24 V battery-fed ECUs in commercial vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and LDO input to limit overvoltage before regulation stage. Use Value: Prevents latch-up or permanent damage to microcontrollers and CAN transceivers by clamping to ≤45.7 V during 400 W surges. |
Use Scenario: Protecting 4–20 mA current-loop sensor outputs from ESD and field-wiring induced spikes in factory automation systems. IC Role / Device Role / Timing Role: TVS diode connected across sensor output terminals to shunt transients before reaching analog front-end amplifier. Use Value: Maintains signal fidelity with only 1.0 µA leakage at 28.2 V, avoiding offset errors in precision current measurement circuits. |
| Telecom DC Power Input Protection | Consumer Device USB Port Surge Suppression |
|
Use Scenario: Safeguarding PoE-powered network switches against lightning-induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary clamping device on main DC input, coordinated with upstream fuse and downstream filter capacitors. Use Value: Withstands repetitive 400 W pulses at 0.01 % duty cycle, ensuring long-term reliability in outdoor telecom cabinets. |
Use Scenario: Adding secondary-level surge immunity to USB Type-C power delivery inputs in portable monitors and docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND to absorb contact ESD (±15 kV air, ±8 kV contact) per IEC 61000-4-2. Use Value: Sub-1 ns response time and 45.7 V clamping prevent damage to USB PD controllers while maintaining compliance with USB-IF electrical specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A | Same SMA package, 33 V VBR, but rated for 400 W with 1.0 µA leakage at VWM; lacks AEC-Q101 qualification and 185 °C rating (TJ max = 150 °C) | Not suitable for automotive under-hood use; acceptable for commercial-grade industrial or telecom power supplies | Select SMAJ33A only if AEC-Q101 and >150 °C operation are not required; verify layout compatibility with identical DO-214AC footprint |
| SMCJ33A | Larger SMC (DO-214AB) package; same 33 V VBR and 400 W rating but higher thermal mass; 1.0 µA leakage; AEC-Q101 available in HE3 variant | Higher IPPM (12.3 A) and lower VC (53.3 V) due to larger junction area; better for high-energy transients | Choose SMCJ33AHE3 when system-level surge tests exceed 400 W or board space allows larger footprint; no PCB redesign needed beyond pad expansion |
Compared with SMAJ33A and SMCJ33A, the TPSMA33AHE3_A/I provides the optimal balance of automotive qualification, compact SMA footprint, and precise 33 V clamping - making it preferred for space-constrained, high-reliability 24 V systems where thermal headroom and AEC-Q101 compliance are mandatory.
Availability
TPSMA33AHE3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power inputs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for TPSMA33AHE3_A/I 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 TVS devices with emphasis on reliability, high-temperature operation, and automotive qualification.
The TPSMA series belongs to Vishay's PAR® family of transient voltage suppressors, engineered specifically for robust, high-energy surge protection in automotive, industrial, and infrastructure applications demanding AEC-Q101 compliance and extended temperature range.
FAQ
What is the exact breakdown voltage range for TPSMA33AHE3_A/I?
The TPSMA33AHE3_A/I has a guaranteed breakdown voltage (VBR) range of 31.4 V (minimum) to 34.7 V (maximum) at 1.0 mA test current, with a nominal value of 33.0 V. This specification is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 23-Jan-2024, Document Number 88405. The TPSMA33AHE3_A/I maintains this tolerance across its qualified operating temperature range.
Is TPSMA33AHE3_A/I AEC-Q101 qualified and what does that cover?
Yes, the TPSMA33AHE3_A/I is AEC-Q101 qualified - verified per the base P/NHE3 automotive ordering code. This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, highly accelerated life testing (HALT), and ESD (HBM ≥ 8 kV). The TPSMA33AHE3_A/I achieves full compliance with the AEC-Q101 standard for discrete semiconductors used in automotive electronics.
What is the clamping voltage of TPSMA33AHE3_A/I under a 400 W transient?
The TPSMA33AHE3_A/I clamps to a maximum of 45.7 V when subjected to its rated 400 W peak pulse power (10/1000 µs waveform) at 8.8 A peak pulse current (IPPM). This VC value is measured per standard test conditions defined in the datasheet and reflects worst-case overvoltage seen by downstream components during surge events.
Does TPSMA33AHE3_A/I have unidirectional or bidirectional polarity?
The TPSMA33AHE3_A/I is unidirectional only - clearly indicated in the Vishay datasheet under FEATURES and PRIMARY CHARACTERISTICS. Its cathode is marked by a color band, and it conducts only when the cathode is at higher potential than the anode. Bidirectional variants are not offered in the TPSMA33AHE3_A/I part number; design must observe correct polarity during PCB layout.
What is the maximum junction temperature rating for TPSMA33AHE3_A/I?
The TPSMA33AHE3_A/I is rated for a maximum junction temperature (TJ) of +185 °C, validated per the manufacturer's thermal characterization and lifetime testing. This rating enables reliable operation in high-ambient environments such as automotive engine compartments or sealed industrial enclosures - a key differentiator versus standard TVS diodes rated at 150 °C or lower.
TPSMA33AHE3_A/I 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_A/I FAQ
1.How can I place an order for TPSMA33AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA33AHE3_A/I 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_A/I reliable?
The price and inventory of TPSMA33AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA33AHE3_A/I is usually 5 days.
3.What payment methods are accepted for TPSMA33AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA33AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA33AHE3_A/I?
TPSMA33AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA33AHE3_A/I 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_A/I?
For technical support, including TPSMA33AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA33AHE3_A/I requirements.
6.How does Aetrix verify that TPSMA33AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All TPSMA33AHE3_A/I 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_A/I meets industry standards.
7.What is the process for return or replacement of TPSMA33AHE3_A/I?
All TPSMA33AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA33AHE3_A/I, 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_A/I part is unused and in its original packaging.
Return procedure for TPSMA33AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA33AHE3_A/I Tags
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