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Vishay General Semiconductor - Diodes Division TPSMC33AHE3/9AT
- Part No.:
- TPSMC33AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
TPSMC33AHE3/9AT.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,405
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Product details
Overview
TPSMC33AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection of sensitive electronics. It features a 33 V nominal breakdown voltage (VBR = 31.4–34.7 V at 1 mA), 28.2 V stand-off voltage (VWM), 45.7 V maximum clamping voltage (VC) at 32.8 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power supplies.
For engineers reviewing the TPSMC33AHE3/9AT datasheet, TPSMC33AHE3/9AT pinout, TPSMC33AHE3/9AT application, or TPSMC33AHE3/9AT equivalent, key selection criteria include its AEC-Q101 qualification, 185 °C junction temperature rating, low incremental surge resistance, and RoHS-compliant matte tin-plated terminals suitable for J-STD-002 soldering.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and fast response time (<1 ns), enabling robust clamping during ESD and lightning-induced transients. Its unidirectional polarity and cathode-band marking align with standard SMC layout conventions for reverse-biased protection circuits.
The device operates across -65 °C to +185 °C junction temperature range and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its 1500 W PPPM rating is validated on 8.0 mm × 8.0 mm copper pads, and clamping performance is specified under non-repetitive 10/1000 μs surge conditions per ANSI/IEEE C62.35.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 31.4 / 33.0 / 34.7 V at 1 mA - defines precise voltage threshold where avalanche conduction begins, critical for matching system overvoltage tolerance |
| VWM | 28.2 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA, ensuring no false triggering in normal operation |
| VC @ IPPM | 45.7 V at 32.8 A - clamped voltage seen by protected circuit during worst-case 10/1000 μs surge, directly limiting stress on downstream components |
| PPPM | 1500 W - peak pulse power handling capability determines survivability against high-energy transients like load dump or inductive switching |
| TJ max | +185 °C - enables reliable operation in under-hood automotive and high-ambient industrial environments without thermal derating penalties |
| Polarity | Unidirectional - provides reverse-biased surge suppression only; requires correct orientation relative to DC rail polarity |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 0.305" × 0.220" footprint, compatible with automated placement and reflow processes |
Pinout & Package
TPSMC33AHE3/9AT uses the SMC (DO-214AB) package: molded epoxy case with matte tin-plated leads, cathode identified by a color band. Dimensions are 7.75 mm × 5.59 mm × 2.30 mm (L × W × H), with recommended 8.0 mm × 8.0 mm copper pads per terminal for thermal and mechanical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection in reverse-biased TVS configuration | Connected to ground or low-impedance return path; carries full surge current during clamping event |
| Cathode | High-side connection in reverse-biased TVS configuration | Connected to protected line (e.g., 24 V rail or signal trace); voltage referenced to anode during avalanche conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - required for engine control, ADAS, and body electronics |
| Junction temperature capability | Rated up to +185 °C - eliminates need for thermal derating in high-ambient applications such as powertrain modules and industrial motor drives |
| 1500 W peak pulse power | Withstands 10/1000 μs surges up to 32.8 A - sufficient for ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Combination Wave testing |
| Low clamping ratio (VC/VBR) | 1.38 - indicates efficient energy diversion with minimal overvoltage overshoot, reducing risk of latch-up or gate oxide damage in protected MOSFETs |
| MSL Level 1 compliance | Reflow-compatible up to 260 °C peak without preconditioning - supports single-pass assembly in high-volume manufacturing |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in engine control units (ECUs) against load dump transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and ground to clamp voltage spikes above 33 V. Use Value: Limits rail voltage to ≤45.7 V during 1500 W surge events, preventing damage to microcontrollers and CAN transceivers downstream. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in pressure/temperature sensors exposed to ESD and cable discharge. IC Role / Device Role / Timing Role: TVS connected across signal and return lines to shunt fast transients before reaching ADC input stages. Use Value: Sub-1 ns response ensures clamping occurs before sensitive front-end op-amps saturate or latch up. |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
Use Scenario: Shielding 48 V PoE-powered equipment inputs from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary TVS on DC input stage, coordinated with upstream GDT or MOV for staged protection. Use Value: 185 °C rating allows operation near heat-generating PoE PD controllers without thermal runaway risk. |
Use Scenario: Adding secondary-level surge immunity to USB VBUS lines in smart home hubs and portable chargers. IC Role / Device Role / Timing Role: Low-capacitance TVS placed after USB connector to suppress contact ESD without degrading signal integrity. Use Value: 1 μA leakage at 28.2 V ensures no impact on USB suspend current budget or battery drain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33AHE3/52T | Same VBR (31.4–34.7 V) and VC (45.7 V), but lower PPPM = 600 W in smaller SMB (DO-214AA) package | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for ISO 7637-2 load dump | Select when board space is constrained and surge threat level is limited to human-body-model ESD or low-energy switching noise |
| TPSMC33AHM3/9AT | Identical electrical specs and SMC package; differs only in halogen-free molding compound and whisker-tested terminations | Required for strict environmental compliance (e.g., EU automotive Tier 1 mandates) but functionally interchangeable | Choose when halogen-free material compliance and enhanced lead finish reliability are mandatory per OEM specification |
Compared with SMBJ33AHE3/52T, TPSMC33AHE3/9AT delivers 2.5× higher surge power handling in the same footprint family, while TPSMC33AHM3/9AT offers identical protection performance with upgraded environmental credentials - both alternatives require no circuit redesign but differ in threat coverage and compliance scope.
Availability
TPSMC33AHE3/9AT is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, and telecom power input stages requiring stable component supply with AEC-Q101 assurance and high-temperature resilience.
Supply support for TPSMC33AHE3/9AT 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 high-reliability diodes, rectifiers, and protection devices for demanding industrial and automotive applications.
The TPSMC33AHE3/9AT belongs to Vishay's PAR® series of high-power TVS diodes, engineered specifically for robust transient suppression in harsh-environment systems where thermal stability and AEC-Q101 validation are mandatory.
FAQ
What is the maximum clamping voltage of the TPSMC33AHE3/9AT under surge conditions?
The TPSMC33AHE3/9AT has a maximum clamping voltage (VC) of 45.7 V when subjected to its rated peak pulse current of 32.8 A using the 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures protected circuits experience no more than 45.7 V during worst-case transient events - critical for safeguarding 3.3 V or 5 V logic interfaces downstream of the TVS.
Is the TPSMC33AHE3/9AT qualified for automotive applications?
Yes, the TPSMC33AHE3/9AT is AEC-Q101 qualified, as confirmed by Vishay's documentation (Document Number 88407). Its 185 °C maximum junction temperature, MSL Level 1 reflow rating, and validation across temperature cycling, humidity bias, and mechanical shock make it suitable for under-hood and chassis-mounted automotive electronics including body control modules and ADAS power supplies.
What does the "HE3" suffix indicate in TPSMC33AHE3/9AT?
The "HE3" suffix in TPSMC33AHE3/9AT denotes a RoHS-compliant, AEC-Q101-qualified version with matte tin-plated leads that meet J-STD-002 solderability and JESD 22-B102 whisker resistance Class 2 requirements. The "9AT" denotes tape-and-reel packaging in 7-inch reels with 850 units per reel, per Vishay's ordering nomenclature.
How does the TPSMC33AHE3/9AT compare to bidirectional TVS diodes?
The TPSMC33AHE3/9AT is unidirectional and intended for DC line protection where polarity is fixed - it offers lower leakage (<1 μA at 28.2 V) and tighter VBR tolerance than equivalent bidirectional parts. Bidirectional variants (e.g., TPSMC33CA) would be needed only for AC-coupled or polarity-agnostic signal lines, but they exhibit higher capacitance and leakage, making TPSMC33AHE3/9AT preferable for stable DC rails.
What PCB layout considerations apply to the TPSMC33AHE3/9AT?
For optimal thermal and electrical performance, the TPSMC33AHE3/9AT must be mounted on 8.0 mm × 8.0 mm copper pads per terminal, as specified in Vishay's datasheet. Short, wide traces to ground and protected line minimize inductance, while avoiding thermal relief on pads ensures effective heat dissipation during surge events - critical to sustaining its 1500 W rating without junction overheating.
TPSMC33AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- 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):
- 32.8A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCJ)
TPSMC33AHE3/9AT FAQ
1.How can I place an order for TPSMC33AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMC33AHE3/9AT 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 TPSMC33AHE3/9AT reliable?
The price and inventory of TPSMC33AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMC33AHE3/9AT is usually 5 days.
3.What payment methods are accepted for TPSMC33AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMC33AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMC33AHE3/9AT?
TPSMC33AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMC33AHE3/9AT 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 TPSMC33AHE3/9AT?
For technical support, including TPSMC33AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMC33AHE3/9AT requirements.
6.How does Aetrix verify that TPSMC33AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All TPSMC33AHE3/9AT 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 TPSMC33AHE3/9AT meets industry standards.
7.What is the process for return or replacement of TPSMC33AHE3/9AT?
All TPSMC33AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMC33AHE3/9AT, 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 TPSMC33AHE3/9AT part is unused and in its original packaging.
Return procedure for TPSMC33AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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