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Vishay General Semiconductor - Diodes Division TPSMA33AHE3/61T
- Part No.:
- TPSMA33AHE3/61T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA33AHE3/61T.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,160
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Product details
Overview
TPSMA33AHE3/61T 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, and operates up to TJ = 185 °C - suitable for automotive power rail protection and industrial sensor interface surge suppression.
For engineers reviewing the TPSMA33AHE3/61T datasheet, TPSMA33AHE3/61T pinout, TPSMA33AHE3/61T application, or TPSMA33AHE3/61T equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (via HE3 suffix), MSL Level 1 rating, and verified 185 °C junction capability for under-hood automotive use.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology with optimized junction passivation for stable clamping performance across temperature. Its 10/1000 µs waveform response delivers consistent 400 W peak pulse power dissipation while maintaining low incremental surge resistance and fast response time - critical for protecting MOSFETs and ICs against lightning-induced surges and inductive switching spikes.
The device is rated for unidirectional operation only, with cathode denoted by a color band. It meets JESD201 Class 2 whisker resistance and is RoHS-compliant; the HE3 suffix confirms AEC-Q101 qualification and halogen-free status per Vishay's material categorization.
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 clamping begins under 1 mA test current |
| VWM | 28.2 V - maximum continuous reverse working voltage before leakage exceeds 1 µA at 25 °C |
| VC @ IPPM | 45.7 V - clamped voltage seen by protected circuit during full 8.8 A surge, limiting stress on downstream components |
| PPPM | 400 W - peak pulse power handling with 10/1000 µs waveform, enabling robust protection against common ESD and surge events |
| TJ max. | 185 °C - enables reliable operation in high-temperature environments such as automotive engine compartments |
| IFSM | 40 A - non-repetitive forward surge current rating (8.3 ms half-sine), supporting high-energy transient absorption |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 0.208" x 0.157" footprint and matte tin-plated leads |
Pinout & Package
TPSMA33AHE3/61T is housed in an SMA (DO-214AC) package with two terminals: cathode (marked by color band) and anode. The package complies with UL 94 V-0 flammability rating and supports reflow soldering per J-STD-020 MSL Level 1 (peak 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line; conducts transient energy to ground when VBR exceeded |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane to complete clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards |
| 185 °C junction rating | Enables deployment in under-hood electronics without derating concerns up to maximum operating temperature |
| 400 W peak pulse power (10/1000 µs) | Provides margin against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surge waveforms in industrial and automotive systems |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage exposure to protected ICs during surge events, improving system-level robustness |
| MSL Level 1, 260 °C peak reflow | Eliminates moisture sensitivity concerns and allows standard SMT assembly without baking or special handling |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs and body control modules from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between power rail and chassis ground to clamp positive-going surges above 28.2 V. Use Value: Withstands 400 W pulses and operates reliably up to 185 °C, meeting OEM requirements for under-hood placement without thermal derating. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLCs or motor drives. IC Role / Device Role / Timing Role: Fast-response TVS placed across sensor output and ground to absorb ESD and cable discharge events. Use Value: Low 45.7 V clamping voltage ensures ADC input stays within safe range during 8.8 A transients, preserving measurement integrity. |
| Consumer Device USB Port Protection | Telecom DC Power Input Surge Suppression |
Use Scenario: Shielding USB VBUS lines in portable chargers and docking stations from hot-plug and ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS connected between VBUS and GND to limit overvoltage during insertion or fault conditions. Use Value: 1 µA leakage at 28.2 V prevents standby current drain; AEC-Q101 qualification supports extended product lifecycle in premium consumer gear. |
Use Scenario: Guarding -48 V telecom power inputs against lightning-induced surges on outdoor base station equipment. IC Role / Device Role / Timing Role: Primary clamping device on DC input stage, coordinated with upstream fuses and secondary filtering. Use Value: 40 A IFSM rating handles repetitive surge duty cycles; DO-214AC package enables high-density PCB layout in space-constrained telecom modules. |
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 VBR range (31.4–34.7 V), but SMB (DO-214AA) package - 20 % larger footprint and 10 % higher thermal resistance | Lower power density; less suitable for ultra-compact automotive modules where board space is constrained | Select SMBJ33A only if existing layout accommodates larger pad geometry and thermal management allows higher junction rise |
| TPSMA33AHM3/61T | Identical electrical specs and SMA package; differs only in halogen-free compliance (HM3 vs. HE3) and whisker test class (both JESD201 Class 2) | No functional difference; HM3 required only where halogen-free materials are mandated by regional environmental regulations | Choose TPSMA33AHM3/61T when RoHS + halogen-free compliance is contractually required; otherwise HE3 offers identical performance |
Compared with SMBJ33A and TPSMA33AHM3/61T, the TPSMA33AHE3/61T delivers optimal balance of compact DO-214AC footprint, AEC-Q101 qualification, and halogen-free RoHS compliance - making it preferred for new automotive and industrial designs requiring both space efficiency and regulatory alignment.
Availability
TPSMA33AHE3/61T is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface clamping, and telecom DC input surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for TPSMA33AHE3/61T 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 TPSMAxxA series is part of Vishay's PAR® (Protected Anisotropic Rectifier) transient voltage suppressor family, engineered specifically for high-temperature stability and AEC-Q101-compliant surge protection in harsh-environment electronics.
FAQ
What is the maximum clamping voltage of the TPSMA33AHE3/61T during a 10/1000 µs surge event?
The TPSMA33AHE3/61T exhibits a maximum clamping voltage (VC) of 45.7 V when subjected to its rated peak pulse current of 8.8 A under the standardized 10/1000 µs waveform. This value is measured per IEC 61000-4-5 and ensures protected circuits remain below critical overvoltage thresholds during transient events. The TPSMA33AHE3/61T maintains this clamping performance across its full operating temperature range.
Is the TPSMA33AHE3/61T qualified for automotive applications?
Yes, the TPSMA33AHE3/61T carries the HE3 suffix, confirming it is AEC-Q101 qualified per Vishay's documentation. It has undergone stress testing including high-temperature reverse bias, temperature cycling, and ESD per JEDEC standards. The device supports junction temperatures up to 185 °C, satisfying under-hood automotive requirements without derating.
What does the "HE3" suffix indicate in TPSMA33AHE3/61T?
The "HE3" suffix in TPSMA33AHE3/61T denotes RoHS-compliant construction, AEC-Q101 qualification, and compliance with JESD201 Class 2 whisker resistance. It also indicates halogen-free molding compound per Vishay's material categorization standard. The "61T" denotes tape-and-reel packaging in 7-inch reels with 1800 units per reel.
How does the TPSMA33AHE3/61T compare to bidirectional TVS diodes in surge protection?
The TPSMA33AHE3/61T is unidirectional only, meaning it clamps positive transients relative to ground and conducts forward current like a rectifier. Unlike bidirectional devices, it cannot suppress negative-going surges on AC-coupled lines. Its advantage lies in lower leakage (<1 µA at 28.2 V) and tighter VBR tolerance - ideal for DC power rails where polarity is fixed and leakage-sensitive circuits exist.
What is the recommended PCB pad layout for the TPSMA33AHE3/61T?
Vishay specifies a minimum pad layout of 0.2" × 0.2" (5.0 mm × 5.0 mm) copper areas per terminal for thermal and surge current handling. The TPSMA33AHE3/61T datasheet (Fig. 2) shows derating curves based on this layout. Deviating from these dimensions reduces peak pulse power capability and may cause premature failure during repetitive surge events.
TPSMA33AHE3/61T 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)
TPSMA33AHE3/61T FAQ
1.How can I place an order for TPSMA33AHE3/61T through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA33AHE3/61T 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 TPSMA33AHE3/61T reliable?
The price and inventory of TPSMA33AHE3/61T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA33AHE3/61T is usually 5 days.
3.What payment methods are accepted for TPSMA33AHE3/61T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA33AHE3/61T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA33AHE3/61T?
TPSMA33AHE3/61T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA33AHE3/61T 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 TPSMA33AHE3/61T?
For technical support, including TPSMA33AHE3/61T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA33AHE3/61T requirements.
6.How does Aetrix verify that TPSMA33AHE3/61T is sourced from the original manufacturer or authorized distributors?
All TPSMA33AHE3/61T 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 TPSMA33AHE3/61T meets industry standards.
7.What is the process for return or replacement of TPSMA33AHE3/61T?
All TPSMA33AHE3/61T units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA33AHE3/61T, 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 TPSMA33AHE3/61T part is unused and in its original packaging.
Return procedure for TPSMA33AHE3/61T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA33AHE3/61T Tags
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