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Vishay General Semiconductor - Diodes Division TPC33AHM3/87A
- Part No.:
- TPC33AHM3/87A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
TPC33AHM3/87A.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:5,559
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Product details
Overview
TPC33AHM3/87A from Vishay General Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) in SMPC (TO-277A) package, designed for high-reliability automotive and industrial surge protection. It features a 33.0 V nominal breakdown voltage (VBR), 28.2 V stand-off voltage (VWM), 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 TPC33AHM3/87A datasheet, TPC33AHM3/87A pinout, TPC33AHM3/87A application, or TPC33AHM3/87A equivalent, key selection criteria include its AEC-Q101 qualification, low-profile 1.1 mm height, MSL Level 1 rating, unidirectional polarity, and suitability for protecting MOSFETs, sensor signal lines, and IC power rails against inductive switching transients.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology with optimized junction passivation for stable clamping under repetitive surge stress. Its 185 °C maximum junction temperature enables operation in under-hood automotive environments and high-power industrial controls without thermal derating penalties.
The device delivers 1500 W peak pulse power (10/1000 µs waveform) with low incremental surge resistance and fast response time-critical for suppressing ESD and load-dump transients before downstream components are damaged. Its SMPC (TO-277A) package supports automated placement and meets UL 94 V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (Nominal) | 33.0 V - precise breakdown threshold ensures reliable triggering before protected circuit damage |
| VWM | 28.2 V - maximum continuous reverse operating voltage compatible with 24 V automotive systems |
| VC @ IPPM | 45.7 V - clamping voltage limits transient overshoot across sensitive loads during 32.8 A surge |
| PPPM | 1500 W - high-energy absorption capacity for 10/1000 µs transients per ISO 7637-2 and IEC 61000-4-5 |
| TJ max. | +185 °C - enables use in engine control units, motor drivers, and other high-temperature zones |
| Package | SMPC (TO-277A) - surface-mount, low-profile (1.1 mm height), AEC-Q101 qualified, MSL Level 1 |
| Polarity | Unidirectional - protects against positive-going transients only; requires correct orientation in circuit |
Pinout & Package
TPC33AHM3/87A is housed in a 3-terminal SMPC (TO-277A) package with cathode band marking on terminal 1. The package has a compact footprint (4.80 × 3.70 mm) and 1.1 mm typical height, optimized for space-constrained PCB layouts and automated SMT assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Protected line connection | Connected to the line being protected (e.g., 24 V rail or sensor output); reverse-biased during normal operation |
| 2 (Cathode) | Protected line connection | Parallel cathode terminal for lower inductance path and improved surge current sharing |
| 3 (Anode) | Ground reference | Connected to system ground or low-impedance return path; 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 JESD47 |
| Junction passivation | Stable VBR and leakage performance over lifetime and temperature extremes (−65 °C to +185 °C) |
| Low-profile SMPC package | 1.1 mm height enables use in ultra-thin modules such as ADAS camera ECUs and battery management sensors |
| MSL Level 1 | No floor life limitation or bake requirement prior to reflow; simplifies manufacturing and inventory handling |
| Halogen-free & RoHS-compliant | Meets global environmental compliance standards without compromising surge robustness or thermal performance |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in engine control units against load dump and jump-start transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between power rail and chassis ground. Use Value: Clamps transients to ≤45.7 V within nanoseconds, preventing damage to microcontrollers and power regulators rated for 36 V absolute maximum. |
Use Scenario: Shielding analog outputs of pressure or temperature sensors in factory automation systems from EFT and surge coupling. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor on differential or single-ended signal traces. Use Value: Maintains signal integrity with <10 μA leakage at 28.2 V while absorbing 1500 W surges without degradation. |
| Motor Drive Gate Driver Protection | Telecom DC Power Interface Protection |
Use Scenario: Safeguarding high-side gate drivers in BLDC inverters from Miller-induced voltage spikes during switching transitions. IC Role / Device Role / Timing Role: Fast-response clamp on driver VDD rail referenced to power ground. Use Value: Sub-1 ns response time and 32.8 A peak current capability prevent latch-up or oxide breakdown in SiC/MOSFET drivers. |
Use Scenario: Front-end protection for PoE-powered equipment (e.g., IP cameras) connected to 48 V DC distribution lines. IC Role / Device Role / Timing Role: Primary unidirectional surge suppressor on input power entry point. Use Value: Withstands repeated 1500 W surges while maintaining 28.2 V working voltage margin above 48 V nominal with derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/57T | Lower PPPM (400 W), SMA package (higher thermal resistance), VC = 53.3 V at 7.5 A | Not suitable for automotive load dump; limited to low-energy ESD and EFT | Select when cost sensitivity outweighs surge energy requirements and board space allows larger footprint |
| TPC33AHE3/87A | Same electrical specs but HM3/87A suffix denotes halogen-free, RoHS-compliant, AEC-Q101 qualified variant with JESD201 Class 2 whisker resistance | Identical functional replacement; differs only in material compliance and qualification scope | Prefer TPC33AHM3/87A for new designs requiring full automotive qualification traceability and whisker-resistant terminations |
Compared with SMAJ33A-E3/57T and TPC33AHE3/87A, the TPC33AHM3/87A uniquely combines 1500 W surge rating, AEC-Q101 qualification, 1.1 mm profile, and JESD201 Class 2 whisker resistance-making it the only option among the three validated for under-hood automotive power rail protection with zero layout compromise.
Availability
TPC33AHM3/87A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, motor drive gate driver safeguarding, and telecom DC power interface protection requiring stable component supply across multi-year production cycles.
Supply support for TPC33AHM3/87A 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, MOSFETs, and passive components for automotive, industrial, and computing markets.
The TPC33AHM3/87A belongs to Vishay's PAR® series of high-power TVS diodes, engineered specifically for AEC-Q101-compliant transient suppression in harsh-environment automotive and industrial power systems.
FAQ
What is the clamping voltage of the TPC33AHM3/87A at its rated peak pulse current?
The TPC33AHM3/87A has a maximum clamping voltage (VC) of 45.7 V when subjected to its rated peak pulse current of 32.8 A under a 10/1000 µs waveform. This value is measured per JEDEC standard test conditions and ensures predictable overvoltage limiting for downstream components like microcontrollers and gate drivers. The TPC33AHM3/87A maintains this clamping performance across its full operating temperature range.
Is the TPC33AHM3/87A suitable for automotive under-hood applications?
Yes, the TPC33AHM3/87A is AEC-Q101 qualified and rated for a maximum junction temperature of +185 °C, making it suitable for under-hood automotive applications such as engine control units, transmission control modules, and ADAS power supplies. Its SMPC package passes mechanical and thermal stress tests required for automotive deployment, and the TPC33AHM3/87A is explicitly listed in Vishay's automotive-grade product portfolio.
What does the "HM3/87A" suffix indicate in TPC33AHM3/87A?
The "HM3/87A" suffix in TPC33AHM3/87A identifies a halogen-free, RoHS-compliant version qualified to AEC-Q101 and tested to JESD201 Class 2 for tin whisker resistance. The "87A" denotes the revision code per Vishay's internal part numbering system, confirming compliance with the April 2022 specification revision (Document Number: 89056). This distinguishes the TPC33AHM3/87A from non-automotive variants.
How does the TPC33AHM3/87A compare to bidirectional TVS diodes in surge protection?
The TPC33AHM3/87A is unidirectional and intended for DC power line protection where only positive-going transients occur-such as 12 V or 24 V automotive rails. Unlike bidirectional TVS diodes, it provides lower leakage (<1 μA at 28.2 V) and tighter VBR tolerance (±5 %), improving system efficiency and noise immunity. The TPC33AHM3/87A is not suitable for AC or bipolar signal lines requiring symmetrical clamping.
What is the recommended PCB pad layout for the TPC33AHM3/87A?
Vishay specifies a mounting pad layout for the TPC33AHM3/87A with minimum dimensions of 4.72 mm × 6.80 mm (length × width), including 1.27 mm solder mask opening and 1.04 mm conductor spacing. Thermal relief and copper pour under the package improve heat dissipation. The TPC33AHM3/87A requires no special stencil design beyond standard SMT guidelines, and its SMPC footprint aligns with JEDEC TO-277A standards for process compatibility.
TPC33AHM3/87A 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:
- 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:
- TO-277A (SMPC)
TPC33AHM3/87A FAQ
1.How can I place an order for TPC33AHM3/87A through Aetrix?
Please submit a Request for Quotation (RFQ) for TPC33AHM3/87A 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 TPC33AHM3/87A reliable?
The price and inventory of TPC33AHM3/87A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPC33AHM3/87A is usually 5 days.
3.What payment methods are accepted for TPC33AHM3/87A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPC33AHM3/87A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPC33AHM3/87A?
TPC33AHM3/87A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPC33AHM3/87A 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 TPC33AHM3/87A?
For technical support, including TPC33AHM3/87A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPC33AHM3/87A requirements.
6.How does Aetrix verify that TPC33AHM3/87A is sourced from the original manufacturer or authorized distributors?
All TPC33AHM3/87A 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 TPC33AHM3/87A meets industry standards.
7.What is the process for return or replacement of TPC33AHM3/87A?
All TPC33AHM3/87A units undergo pre-shipment inspection (PSI). If there is an issue with TPC33AHM3/87A, 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 TPC33AHM3/87A part is unused and in its original packaging.
Return procedure for TPC33AHM3/87A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPC33AHM3/87A Tags
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