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Vishay General Semiconductor - Diodes Division SMPC33AN-M3/I
- Part No.:
- SMPC33AN-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC33AN-M3/I.pdf
- Description:
- TVS DIODE 33VWM 53.3VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:8,273
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Product details
Overview
SMPC33AN-M3/I from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor in the SMPC (TO-277A) package, rated for 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR), and 1500 W peak pulse power (PPPM) with 53.3 V clamping voltage at 28.1 A. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive and industrial electronics.
For engineers reviewing the SMPC33AN-M3/I datasheet, SMPC33AN-M3/I pinout, SMPC33AN-M3/I application, or SMPC33AN-M3/I equivalent, this device is selected for high-energy surge suppression where low-profile mounting (1.1 mm height), AEC-Q101 qualification (via HM3 suffix variants), and halogen-free RoHS compliance are required in space-constrained PCB layouts.
Technical Context
This unidirectional TVS diode operates by avalanche breakdown to clamp transient overvoltages above its VWM of 33 V, limiting downstream voltage to ≤53.3 V during a 10/1000 μs surge. Its low incremental surge resistance and fast response time ensure effective protection of sensitive inputs without adding parasitic capacitance that degrades high-speed signal integrity.
The SMPC33AN-M3/I uses a dual-anode/single-cathode configuration in the SMPC (TO-277A) package - optimized for thermal performance with RθJM = 2.5 °C/W (typ.) when mounted on heatsink - and meets JESD201 Class 2 whisker resistance and MSL Level 1 reflow compatibility (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR min/max | 36.7 V / 40.6 V at 1 mA - guaranteed avalanche initiation range; ensures predictable turn-on across temperature and process variation |
| VC @ IPPM | 53.3 V at 28.1 A - clamped voltage during full-rated 10/1000 μs surge; determines maximum stress imposed on protected circuitry |
| PPPM | 1500 W - peak pulse power handling capability; enables robust protection against IEC 61000-4-5 Level 4 surges |
| Package | SMPC (TO-277A) - 3-terminal surface-mount package with 1.1 mm profile; supports automated placement and high thermal conductivity via heatsink-mount option |
| Polarity | Unidirectional - cathode-band marked terminal; blocks reverse current until breakdown, suitable for DC-biased lines like power rails and sensor outputs |
| TJ max | 150 °C - maximum junction temperature; allows operation in under-hood automotive environments and industrial enclosures without derating |
Pinout & Package
SMPC33AN-M3/I uses the SMPC (TO-277A) package: a 3-terminal surface-mount outline conforming to JEDEC TO-277A, with 1.1 mm typical height, matte tin-plated leads, and cathode band marking on the top surface. The package supports both anode-heatsink and cathode-heatsink mounting configurations per datasheet Fig. 3 layout options.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Primary anode connection | Electrically tied to Anode 2 internally; used for low-inductance parallel routing in high-current surge paths |
| Anode 2 | Secondary anode connection | Redundant anode terminal enabling symmetric PCB layout and improved current sharing during multi-pulse events |
| Cathode (band-marked) | Clamping output node | Connected to protected line (e.g., VCC or signal); voltage referenced to anodes during transient conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMPC package | 1.1 mm typical height enables use in ultra-thin modules and stacked PCB assemblies without mechanical interference |
| AEC-Q101 qualified variant available | SMPC33ANHM3/I version meets automotive reliability standards; SMPC33AN-M3/I is industrial-grade but shares identical electrical specs and footprint |
| Halogen-free & RoHS-compliant | M3 suffix confirms compliance with EU RoHS Directive 2011/65/EU and halogen-free material requirements per IEC 61249-2-21 |
| MSL Level 1 rating | Rated for unlimited floor life and peak reflow temperature of 260 °C - eliminates baking requirements prior to SMT assembly |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving protection margin for 3.3 V/5 V logic |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump and inductive switching transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND, clamping surges before they reach LDOs and microcontrollers. Use Value: Withstands 1500 W peak pulses and clamps to 53.3 V, ensuring downstream 36 V-rated components remain within safe operating area. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops or 0–5 V sensor outputs) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between signal and ground, preserving bandwidth while suppressing >8 kV HBM transients. Use Value: Fast response time and 53.3 V clamping prevent latch-up or gate oxide damage in op-amps and ADC front-ends. |
| Telecom DC Power Interface | Consumer Device USB/Power Input Protection |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) against lightning-induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of DC-DC converters and hot-swap controllers. Use Value: 1500 W PPPM rating handles multi-kA induced surges; SMPC package enables compact, thermally efficient layout near connector entry point. |
Use Scenario: Adding secondary-level overvoltage protection to USB-C PD input stages or wall-adapter-fed consumer electronics. IC Role / Device Role / Timing Role: Standoff-rated TVS on VBUS line, triggered only during fault conditions (e.g., adapter malfunction or miswiring). Use Value: 33 V VWM provides margin above 20 V PD PPS max, while 53.3 V VC ensures MCU and PMIC survival during 10/1000 μs transients. |
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 (Vishay) | DO-214AC package; 33 V VWM, 53.3 V VC, but lower PPPM (400 W) and higher RθJA (110 °C/W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 pulse 5a or high-repetition surges | Select SMAJ33A-E3/5A only when board space permits larger footprint and thermal budget allows higher junction rise |
| TPSMD33CA (Texas Instruments) | Bidirectional configuration; same VWM/VC ratings but symmetrical clamping for AC-coupled lines; slightly higher IR (5 μA vs. 1 μA) | Required for differential or AC signal protection (e.g., RS-485); not usable on DC-biased rails without redesign | Choose TPSMD33CA only when bidirectional clamping is mandatory; otherwise SMPC33AN-M3/I offers superior unidirectional energy handling |
Compared with SMAJ33A-E3/5A and TPSMD33CA, SMPC33AN-M3/I delivers 3.75× higher peak power handling in a lower-profile package with better thermal resistance to heatsink, making it optimal for high-reliability DC rail protection where space and thermal performance are constrained.
Availability
SMPC33AN-M3/I is available at Aetrix Electronics and suitable for automotive ECU power conditioning, industrial sensor interface design, and telecom DC input protection requiring stable component supply and long-term manufacturability.
Supply support for SMPC33AN-M3/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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMPC series was developed for high-energy transient suppression in space-constrained, thermally demanding environments - particularly automotive power distribution, industrial automation I/O modules, and ruggedized communications infrastructure.
FAQ
What is the clamping voltage of SMPC33AN-M3/I at its rated peak pulse current?
The SMPC33AN-M3/I has a maximum clamping voltage (VC) of 53.3 V at its rated peak pulse current (IPPM) of 28.1 A under a 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 89116 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SMPC33AN-M3/I maintains this clamping performance across its specified operating temperature range.
Is SMPC33AN-M3/I AEC-Q101 qualified?
No, SMPC33AN-M3/I is the industrial-grade variant with M3 suffix. The AEC-Q101 qualified version is SMPC33ANHM3/I (note HM3 prefix). Both share identical electrical characteristics and SMPC (TO-277A) packaging, but only the HM3 variant undergoes automotive-grade stress testing per AEC-Q101. SMPC33AN-M3/I remains suitable for non-automotive industrial and telecom applications.
What does the "I" suffix mean in SMPC33AN-M3/I?
The "I" suffix in SMPC33AN-M3/I denotes the preferred tape-and-reel packaging option: 13-inch diameter plastic tape and reel, containing 6500 units per reel. This contrasts with the "H" suffix (7-inch reel, 1500 units). The "I" format supports high-volume SMT production with reduced changeover frequency and optimized feeder compatibility.
Can SMPC33AN-M3/I be mounted with either anode or cathode on a heatsink?
Yes, the SMPC33AN-M3/I supports both anode-heatsink and cathode-heatsink mounting configurations as documented in Vishay's SMPCxxAN datasheet Figure 3. This flexibility allows thermal design optimization depending on PCB layer stack-up and grounding scheme - critical for maintaining TJ ≤ 150 °C during repetitive surge events.
How does SMPC33AN-M3/I differ from SMPC33A-M3/I?
SMPC33AN-M3/I is the unidirectional variant with 1.0 μA maximum reverse leakage at VWM (33 V), while SMPC33A-M3/I is bidirectional with symmetrical clamping but higher leakage (1500 μA). The "N" suffix explicitly denotes unidirectional polarity. SMPC33AN-M3/I is intended for DC-biased lines like power rails; SMPC33A-M3/I suits AC-coupled or differential signal paths.
SMPC33AN-M3/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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-277A (SMPC)
SMPC33AN-M3/I FAQ
1.How can I place an order for SMPC33AN-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC33AN-M3/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 SMPC33AN-M3/I reliable?
The price and inventory of SMPC33AN-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC33AN-M3/I is usually 5 days.
3.What payment methods are accepted for SMPC33AN-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC33AN-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC33AN-M3/I?
SMPC33AN-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC33AN-M3/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 SMPC33AN-M3/I?
For technical support, including SMPC33AN-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC33AN-M3/I requirements.
6.How does Aetrix verify that SMPC33AN-M3/I is sourced from the original manufacturer or authorized distributors?
All SMPC33AN-M3/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 SMPC33AN-M3/I meets industry standards.
7.What is the process for return or replacement of SMPC33AN-M3/I?
All SMPC33AN-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMPC33AN-M3/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 SMPC33AN-M3/I part is unused and in its original packaging.
Return procedure for SMPC33AN-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMPC33AN-M3/I Tags
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