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Vishay General Semiconductor - Diodes Division TPC33AHM3_A/I
- Part No.:
- TPC33AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
TPC33AHM3_A/I.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:6,500
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Product details
Overview
TPC33AHM3_A/I from Vishay General Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) in TO-277A (SMPC) package, designed for high-reliability automotive and industrial electronics protection. It features a breakdown voltage of 31.4–34.7 V at 1 mA, clamping voltage of 45.7 V at 32.8 A peak pulse current, and operates up to 185 °C junction temperature.
For engineers reviewing the TPC33AHM3_A/I datasheet, TPC33AHM3_A/I pinout, TPC33AHM3_A/I application, or TPC33AHM3_A/I equivalent, this device is selected for robust overvoltage protection on power rails and signal lines where low-profile surface-mount placement, AEC-Q101 qualification, and fast response to 10/1000 µs transients are required.
Technical Context
The TPC33AHM3_A/I implements passivated anisotropic rectifier technology optimized for low incremental surge resistance and excellent clamping performance under repetitive and non-repetitive surge conditions. Its unidirectional architecture supports forward-biased operation only, with a maximum instantaneous forward voltage of 3.5 V at 100 A.
Rated for 1500 W peak pulse power per 10/1000 µs waveform and qualified to AEC-Q101, it delivers stable clamping behavior across -65 °C to +185 °C operating junction temperature range, meeting MSL Level 1 per J-STD-020 and JESD 201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at 1 mA - defines precise reverse breakdown threshold for reliable triggering during overvoltage events |
| VWM | 28.2 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 45.7 V at 32.8 A - clamping voltage limiting protected circuit stress during 10/1000 µs surge |
| PPPM | 1500 W - peak pulse power handling capability under standardized surge waveform |
| TJ max. | +185 °C - enables use in under-hood automotive and high-temperature industrial environments |
| Polarity | Unidirectional - supports DC rail protection with forward conduction path and reverse avalanche clamping |
| Package | TO-277A (SMPC) - ultra-low profile (1.1 mm typical height), compatible with automated SMT placement |
Pinout & Package
TO-277A (SMPC) is a 3-terminal surface-mount package with cathode-anode-cathode configuration. The device uses a dual-cathode layout to support symmetrical thermal dissipation and low-inductance mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 (Cathode) | Reverse-biased clamping node | Connected to protected line; conducts avalanche current during overvoltage |
| Terminal 2 (Anode) | Reference/ground return path | Common reference point for clamping; must be low-impedance to ground plane |
| Terminal 3 (Cathode) | Reverse-biased clamping node | Electrically identical to Terminal 1; enables dual-side PCB routing and thermal symmetry |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design ensures stable VBR tolerance and long-term reliability under thermal cycling |
| AEC-Q101 qualification | Validated for automotive-grade deployment including temperature cycling, humidity bias, and mechanical shock testing |
| Low profile (1.1 mm) | Enables integration into space-constrained modules such as ADAS ECUs and motor control inverters |
| MSL Level 1 | Zero floor life limitation - no baking required prior to reflow soldering |
| Halogen-free & RoHS | HM3 suffix confirms compliance with environmental regulations and material categorization per Vishay Doc. 99912 |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in engine control units against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery rail and downstream DC/DC converter input. Use Value: Limits transient voltage to ≤45.7 V during 32.8 A surges, preventing damage to 36 V-rated regulators and microcontrollers. |
Use Scenario: Shielding analog output lines of pressure or temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor installed at sensor connector interface. Use Value: Clamps ESD and cable discharge events without distorting 0–5 V analog signals due to fast <1 ns response time. |
| Telecom DC Power Input Protection | Consumer Device USB Power Path Protection |
Use Scenario: Safeguarding 48 V PoE-powered equipment inputs against lightning-induced surges on outdoor Ethernet links. IC Role / Device Role / Timing Role: Primary-level TVS on secondary-side DC bus after isolation transformer and rectifier. Use Value: Absorbs 1500 W pulses while maintaining VC below 50 V, preserving integrity of 56 V-rated DC-DC controllers. |
Use Scenario: Overvoltage suppression on VBUS line of portable speakers and smart home hubs with USB-C PD input. IC Role / Device Role / Timing Role: Standoff-rated TVS placed upstream of USB PD controller and load switch. Use Value: Blocks >28 V transients before they reach silicon, leveraging 28.2 V VWM and 1 µA leakage at room temperature. |
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-E3/57T (Vishay) | Lower PPPM (400 W), SMA package (higher profile, lower thermal mass), same VBR range | Not AEC-Q101 qualified; limited to commercial/industrial use; unsuitable for under-hood automotive | Select when cost sensitivity outweighs power rating and automotive qualification needs |
| TPC33AHM3_A/H (Vishay) | Identical electrical specs and TO-277A package; differs only in tape-and-reel packaging (7" vs. 13" reel, 1500 vs. 6500 pcs) | No functional difference; used interchangeably where volume order size or feeder compatibility dictates reel diameter | Choose based on production line feeder configuration and minimum order quantity requirements |
Compared with SMAJ33A-E3/57T and TPC33AHM3_A/H, the TPC33AHM3_A/I offers full AEC-Q101 qualification and 1500 W surge capacity in a low-profile SMPC package-making it uniquely suited for high-reliability automotive power rail protection where both performance and compliance are mandatory.
Availability
TPC33AHM3_A/I is available at Aetrix Electronics and suitable for automotive power distribution modules, industrial sensor interfaces, and telecom DC input stages requiring stable component supply, AEC-Q101 compliance, and 1500 W transient immunity.
Supply support for TPC33AHM3_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 protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The TPC series belongs to Vishay's PAR® family of high-power TVS diodes, engineered specifically for demanding automotive and industrial surge protection where high-temperature operation, low-profile mounting, and AEC-Q101 validation are essential.
FAQ
What is the clamping voltage of the TPC33AHM3_A/I under maximum rated surge current?
The TPC33AHM3_A/I has a maximum clamping voltage (VC) of 45.7 V when subjected to its peak pulse current (IPPM) of 32.8 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable voltage limiting during surge events. The TPC33AHM3_A/I maintains this clamping performance across its full operating temperature range, making it suitable for critical power rail protection where voltage overshoot must remain tightly bounded.
Is the TPC33AHM3_A/I qualified for automotive applications?
Yes, the TPC33AHM3_A/I is AEC-Q101 qualified and explicitly rated for automotive-grade use, including under-hood environments. Its 185 °C maximum junction temperature, MSL Level 1 moisture sensitivity rating, and JESD 201 Class 2 whisker resistance confirm suitability for automotive electronics. The TPC33AHM3_A/I meets all stress test requirements defined in the AEC-Q101 standard, and its HM3 suffix denotes halogen-free, RoHS-compliant construction validated for automotive deployment.
What does the "HM3_A/I" suffix indicate in TPC33AHM3_A/I?
The "HM3" suffix identifies the halogen-free, RoHS-compliant, AEC-Q101-qualified version in TO-277A (SMPC) package; "A" denotes the revision code; "I" specifies 13-inch tape-and-reel packaging with 6500 units per reel. This distinguishes TPC33AHM3_A/I from variants like TPC33AHM3_A/H (7-inch reel, 1500 units). The TPC33AHM3_A/I is fully interchangeable electrically and mechanically with other HM3-suffix variants-the only difference is packaging format and reel size.
How does the dual-cathode configuration of the TPC33AHM3_A/I affect PCB layout?
The TPC33AHM3_A/I's TO-277A package features two cathode terminals (Pins 1 and 3) and one anode (Pin 2), enabling symmetrical current sharing and improved thermal spreading across the PCB copper area. This layout reduces localized heating during surge events and allows flexible routing-especially useful in dense automotive modules where thermal management is critical. The TPC33AHM3_A/I's pinout requires matching footprint per Vishay's recommended pad layout (Document 89056, page 4), with 0.268" × 0.186" mounting area.
Can the TPC33AHM3_A/I replace older TVS devices like P6KE33A in new designs?
The TPC33AHM3_A/I is not a direct replacement for through-hole devices like P6KE33A due to fundamental differences in package (TO-277A vs. DO-15), mounting method, thermal path, and surge rating (1500 W vs. 600 W). While both share similar VBR (~33 V), the TPC33AHM3_A/I offers higher power handling, lower profile, AEC-Q101 qualification, and surface-mount compatibility. Redesign is required to accommodate the TPC33AHM3_A/I's footprint and optimize PCB thermal relief-so the TPC33AHM3_A/I serves as a next-generation upgrade, not a drop-in substitute.
TPC33AHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- TO-277, 3-PowerDFN
- Series:
- PAR®, eSMP®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- TO-277A (SMPC)
TPC33AHM3_A/I FAQ
1.How can I place an order for TPC33AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPC33AHM3_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 TPC33AHM3_A/I reliable?
The price and inventory of TPC33AHM3_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 TPC33AHM3_A/I is usually 5 days.
3.What payment methods are accepted for TPC33AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPC33AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPC33AHM3_A/I?
TPC33AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPC33AHM3_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 TPC33AHM3_A/I?
For technical support, including TPC33AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPC33AHM3_A/I requirements.
6.How does Aetrix verify that TPC33AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All TPC33AHM3_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 TPC33AHM3_A/I meets industry standards.
7.What is the process for return or replacement of TPC33AHM3_A/I?
All TPC33AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with TPC33AHM3_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 TPC33AHM3_A/I part is unused and in its original packaging.
Return procedure for TPC33AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPC33AHM3_A/I Tags
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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