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Vishay General Semiconductor - Diodes Division SMPC33ANHM3/I
- Part No.:
- SMPC33ANHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC33ANHM3/I.pdf
- Description:
- TVS DIODE 33VWM 53.3VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:2,382
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Product details
Overview
SMPC33ANHM3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the TRANSZORB® family, designed for high-energy surge protection on DC power rails and signal lines. It features a 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR), 53.3 V clamping voltage at 28.1 A peak pulse current, and 1500 W peak pulse power rating with a 10/1000 μs waveform. Used in automotive sensor units and industrial control inputs to protect MOSFETs and ICs against inductive switching transients.
For engineers reviewing the SMPC33ANHM3/I datasheet, SMPC33ANHM3/I pinout, SMPC33ANHM3/I application, or SMPC33ANHM3/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, TO-277A package dimensions, clamping performance under standardized surge conditions, and direct alternatives for automotive-grade transient suppression.
Technical Context
The SMPC33ANHM3/I operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold to clamp transient energy into ground. Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of ESD and load-dump events without affecting normal circuit operation below 33 V.
Designed for surface-mount placement on FR4 PCBs with 2 oz copper, it leverages the SMPC (TO-277A) package's dual-anode/dual-cathode configuration - with cathode band marking - to support high-current surge paths while maintaining a 1.1 mm profile and MSL Level 1 moisture sensitivity rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 36.7 V / 40.6 V at 1 mA - guaranteed avalanche onset range for reliable triggering |
| VC @ IPPM | 53.3 V at 28.1 A - clamped voltage during 10/1000 μs surge, limiting stress on downstream components |
| PPPM | 1500 W - peak pulse power handling capability per JEDEC standard waveform |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMPC (TO-277A) - 3-terminal SMD package with cathode band marking and 1.1 mm height |
| AEC-Q101 | Qualified - certified for automotive electronic systems per stress test requirements |
Pinout & Package
SMPC33ANHM3/I uses the SMPC (TO-277A) surface-mount package: 3-pin, single-row, gull-wing leads, 1.1 mm typical height, JEDEC-compliant outline. Cathode is marked by a band on the component body. Terminals are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 & Anode 2 | Common anode connection | Internally tied anodes provide low-inductance path to ground reference during clamping |
| Cathode | Transient input terminal | Connected to protected line (e.g., 33 V rail); conducts to anodes when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping | Enables integration on positive-rail protection without interfering with normal forward-biased operation |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control, ADAS sensors, and body electronics |
| 1500 W peak pulse rating | Withstands ISO 7637-2 Pulse 1/2a/5a surges and IEC 61000-4-5 combination wave events |
| Low-profile SMPC package | 1.1 mm height supports dense PCB layouts and automated pick-and-place assembly |
| Halogen-free & RoHS | Complies with environmental regulations for industrial and automotive supply chains |
Applications
| Automotive Sensor Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load-dump and inductive kickback in vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor supply rail and ground to clamp transients before they reach precision analog ICs or communication interfaces. Use Value: Limits voltage excursion to ≤53.3 V during 28.1 A surges, preventing latch-up or permanent damage to 3.3 V/5 V/12 V sensor signal conditioning circuits. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil switching and motor drive noise in factory automation. IC Role / Device Role / Timing Role: Mounted across 24 V DC input terminals to absorb repetitive 1500 W surges induced by contactor de-energization. Use Value: Maintains system uptime by preventing false triggering or destruction of optocouplers and microcontroller GPIOs during field wiring transients. |
| Telecom Power Rail Protection | Consumer Power Adapter Output Protection |
Use Scenario: Securing 48 V PoE (Power over Ethernet) interface circuitry in network switches and IP cameras against lightning-induced surges on data/power lines. IC Role / Device Role / Timing Role: Placed on the secondary-side DC output of isolated DC/DC converters to suppress common-mode transients coupled onto powered devices. Use Value: Clamps 10/1000 μs surges to 53.3 V while dissipating 1500 W, ensuring compliance with IEC 61000-4-5 Level 4 immunity requirements. | Use Scenario: Protecting USB-C PD and AC/DC adapter outputs against user-induced short-circuit transients and capacitor discharge spikes during hot-plug events. IC Role / Device Role / Timing Role: Connected between regulated 5–20 V output and ground to limit overvoltage during fault conditions in compact consumer adapters. Use Value: Provides fail-safe clamping with <1 ns response, preserving USB-PD controller ICs and Type-C port electronics without adding bulk or thermal overhead. |
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-E3/5A | Same VWM (33 V), lower PPPM (400 W), SMA package (higher RθJA) | Limited to lower-energy surges; not AEC-Q101 qualified | Select for cost-sensitive industrial designs where 1500 W rating is unnecessary |
| 1.5KE33A | Through-hole DO-201 package, same VWM/VC, higher thermal mass but no SMT compatibility | Requires board real estate and manual assembly; unsuitable for high-volume automotive production | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMAJ33A-E3/5A and 1.5KE33A, the SMPC33ANHM3/I delivers automotive-grade reliability in a low-profile SMT package with 3.75× higher peak power handling than SMAJ33A and full compatibility with automated manufacturing - critical for Tier 1 automotive suppliers and industrial OEMs requiring AEC-Q101 validation.
Availability
SMPC33ANHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC inputs, telecom PoE interfaces, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for SMPC33ANHM3/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 SMPC series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power, low-profile transient suppression in automotive, industrial, and communications infrastructure where AEC-Q101 compliance and space-constrained layouts are mandatory.
FAQ
What is the clamping voltage of SMPC33ANHM3/I at its rated peak pulse current?
The SMPC33ANHM3/I has a maximum clamping voltage (VC) of 53.3 V when subjected to its rated peak pulse current (IPPM) of 28.1 A under a 10/1000 μs waveform. This value is measured per JEDEC-standard test conditions and ensures downstream ICs see limited overvoltage stress during surge events. The SMPC33ANHM3/I maintains this clamping performance across its specified operating temperature range.
Is SMPC33ANHM3/I qualified for automotive applications?
Yes, SMPC33ANHM3/I is AEC-Q101 qualified, as confirmed by Vishay's documentation for the SMPC22AN through SMPC85AN series. The "HM3" suffix explicitly denotes AEC-Q101 qualification, halogen-free composition, and RoHS compliance. This makes SMPC33ANHM3/I suitable for use in automotive ECUs, ADAS sensors, and body control modules where reliability under thermal and mechanical stress is critical.
What does the "I" suffix mean in SMPC33ANHM3/I?
The "I" suffix in SMPC33ANHM3/I indicates the preferred packaging option: 13-inch diameter plastic tape and reel, with a base quantity of 6500 units per reel. This format is optimized for high-volume SMT assembly lines. The "HM3" portion confirms AEC-Q101 qualification and halogen-free/RoHS compliance, while "AN" designates the unidirectional variant with enhanced surge capability versus non-AN types.
How does the SMPC (TO-277A) package differ from SMA or SMB packages in terms of thermal performance?
The SMPC (TO-277A) package used by SMPC33ANHM3/I offers lower thermal resistance than SMA/SMB: RθJM is 2.5–3.0 °C/W (junction-to-mount), compared to ~15–20 °C/W for SMA. Its dual-anode construction improves current sharing and reduces localized heating during high-energy surges. This enables SMPC33ANHM3/I to sustain 1500 W pulses without thermal runaway - a key advantage over smaller packages in automotive and industrial applications.
Can SMPC33ANHM3/I be used in bidirectional configurations?
No, SMPC33ANHM3/I is strictly unidirectional, as stated in Vishay's datasheet under FEATURES and PRIMARY CHARACTERISTICS. It conducts only when cathode voltage exceeds anode voltage by ≥VBR. For bidirectional protection, two SMPC33ANHM3/I devices must be connected in series opposition - but this is not recommended due to mismatched VBR tolerances. Use a dedicated bidirectional part like SMPC33CANHM3/I if AC or symmetrical transient suppression is required.
SMPC33ANHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- TO-277, 3-PowerDFN
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 28.1A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-277A (SMPC)
SMPC33ANHM3/I FAQ
1.How can I place an order for SMPC33ANHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC33ANHM3/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 SMPC33ANHM3/I reliable?
The price and inventory of SMPC33ANHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC33ANHM3/I is usually 5 days.
3.What payment methods are accepted for SMPC33ANHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC33ANHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC33ANHM3/I?
SMPC33ANHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC33ANHM3/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 SMPC33ANHM3/I?
For technical support, including SMPC33ANHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC33ANHM3/I requirements.
6.How does Aetrix verify that SMPC33ANHM3/I is sourced from the original manufacturer or authorized distributors?
All SMPC33ANHM3/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 SMPC33ANHM3/I meets industry standards.
7.What is the process for return or replacement of SMPC33ANHM3/I?
All SMPC33ANHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMPC33ANHM3/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 SMPC33ANHM3/I part is unused and in its original packaging.
Return procedure for SMPC33ANHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMPC33ANHM3/I Tags
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