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Vishay General Semiconductor - Diodes Division SMPC33A-M3/86A
- Part No.:
- SMPC33A-M3/86A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC33A-M3/86A.pdf
- Description:
- TVS DIODE 33VWM 53.3VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:2,049
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Product details
Overview
SMPC33A-M3/86A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in the SMPC (TO-277A) package, designed for clamping inductive-switching transients on 33 V DC power rails. It delivers 1500 W peak pulse power (10/1000 μs), clamps at ≤53.3 V under 28.1 A surge, and operates from –55 °C to +150 °C junction temperature - used in automotive sensor signal line protection and industrial PLC I/O modules.
For engineers reviewing the SMPC33A-M3/86A datasheet, SMPC33A-M3/86A pinout, SMPC33A-M3/86A application, or SMPC33A-M3/86A equivalent, key selection criteria include unidirectional polarity, 33 V stand-off voltage, 53.3 V max clamping at rated IPPM, TO-277A thermal performance (RθJA ≤ 100 °C/W), and AEC-Q101 qualification eligibility via HM3 suffix variants.
Technical Context
This device functions as a silicon avalanche diode optimized for fast transient suppression on DC power and signal lines. Its unidirectional configuration enables integration in polarity-sensitive circuits such as 33 V automotive supply rails and microcontroller GPIO protection where reverse-bias leakage must remain below 1.0 μA at VWM.
The SMPC33A-M3/86A uses a planar junction structure with low incremental surge resistance and sub-nanosecond response time, enabling effective clamping of ESD (IEC 61000-4-2) and load-dump (ISO 7637-2) events. Its SMPC (TO-277A) package provides dual anode/cathode terminals for high-current path routing and meets J-STD-020 MSL Level 1 reflow compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.0 V - maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 36.7 V / 40.6 V at 1.0 mA - breakdown threshold range defining turn-on consistency |
| VC @ IPPM | ≤53.3 V at 28.1 A (10/1000 μs) - clamping voltage limiting downstream component stress |
| PPPM | 1500 W - peak transient energy absorption capability under standardized surge waveform |
| IR @ VWM | ≤1.0 μA - ultra-low leakage preserving signal integrity and battery life in always-on systems |
| TJ max | +150 °C - extended thermal rating supporting under-hood automotive and industrial ambient conditions |
| Package | SMPC (TO-277A) - 3-terminal surface-mount outline with 1.1 mm profile and dual-anode layout |
Pinout & Package
SMPC33A-M3/86A uses the SMPC (TO-277A) package: 3-terminal, very low-profile (1.1 mm typical height), matte tin-plated leads, halogen-free and RoHS-compliant. Polarity marked by cathode band; terminals are Anode 1, Anode 2, and Cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Primary current entry point during forward conduction | Connected to protected line (e.g., 33 V rail); forms one half of parallel anode structure for lower dynamic resistance |
| Anode 2 | Secondary current entry point during forward conduction | Electrically tied to Anode 1 internally; enables symmetrical PCB layout and improved thermal spreading across copper pour |
| Cathode | Current exit terminal during clamping event | Connected to ground or low-impedance return path; band-marked end ensures correct orientation during automated placement |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (1.1 mm) | Enables use in space-constrained modules like automotive ADAS ECUs and portable industrial sensors without height interference |
| Unidirectional polarity | Supports DC-biased protection schemes where reverse leakage must be minimized - e.g., 33 V CAN FD power domains |
| Meets MSL Level 1 (260 °C peak) | Allows single-pass lead-free reflow without moisture-related delamination or popcorn failure |
| AEC-Q101 qualified option | HM3-suffix variant available for automotive applications requiring validated reliability per JESD22-A108 and JESD22-A110 |
| Low incremental surge resistance | Reduces clamping overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a), improving system-level immunity margin |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Module |
|---|---|
Use Scenario: Protecting 33 V supply lines feeding Hall-effect position sensors in engine control units exposed to load-dump transients. IC Role / Device Role / Timing Role: TVS diode providing primary overvoltage clamping on sensor VDD rail, placed within 2 cm of sensor IC input. Use Value: Limits transient voltage to ≤53.3 V, preventing latch-up or permanent damage to 33 V-rated sensor ICs during ISO 7637-2 Pulse 5a events. | Use Scenario: Safeguarding digital input channels on programmable logic controller modules interfacing with 24–36 V industrial field devices. IC Role / Device Role / Timing Role: Unidirectional TVS placed at connector entry point to shunt induced switching surges from solenoid drivers or relay coils. Use Value: Absorbs up to 1500 W of transient energy while maintaining <1.0 μA leakage, ensuring stable logic-level recognition during long-term operation. |
| Telecom Power Interface | Consumer Appliance Motor Control |
Use Scenario: Clamping voltage spikes on 33 V bias rails powering optical transceivers in enterprise network switches. IC Role / Device Role / Timing Role: Standoff-rated TVS suppressing EFT (IEC 61000-4-4) bursts coupled onto DC feed lines from adjacent AC circuitry. Use Value: Responds in <1 ns to limit spike amplitude to safe levels for sensitive laser driver ICs, reducing bit-error rate in high-speed links. | Use Scenario: Protecting gate drivers and MCU I/O pins in smart washing machine motor inverters subject to back-EMF from brushed DC motors. IC Role / Device Role / Timing Role: Primary transient suppressor on 33 V auxiliary supply feeding isolated gate driver ICs and current sense amplifiers. Use Value: Withstands repetitive 28.1 A surges without degradation, extending service life in high-cycle appliance environments. |
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 | DO-214AC package; 1.5 kW PPPM; 53.3 V VC; 33 V VWM; same clamping but higher RθJA (150 °C/W) | Less efficient thermal dissipation in high-density layouts; not MSL Level 1 rated | Select when board space allows larger footprint and thermal management uses external heatsinking |
| SMCJ33A | DO-214AB package; 1500 W PPPM; 53.3 V VC; 33 V VWM; 2.3 mm height vs. 1.1 mm | Higher profile limits use in ultra-thin modules; identical electrical specs but inferior reflow compatibility (MSL Level 2) | Choose only if existing DO-214AB footprint reuse is required and height constraint is relaxed |
Compared with SMAJ33A-E3/5A and SMCJ33A, the SMPC33A-M3/86A offers superior board-level integration via its 1.1 mm profile, MSL Level 1 reflow readiness, and dual-anode thermal path - critical for automotive and compact industrial designs where layout density and process robustness are prioritized over legacy package compatibility.
Availability
SMPC33A-M3/86A is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O modules, telecom power interfaces, and consumer appliance motor control requiring stable component supply and consistent parametric performance across production lots.
Supply support for SMPC33A-M3/86A 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, thermal performance, and automotive-grade qualification.
The SMPC series was developed to deliver high-power transient suppression in ultra-low-profile surface-mount packages for next-generation automotive and industrial electronics where board space and thermal constraints limit traditional TVS solutions.
FAQ
What is the maximum clamping voltage of SMPC33A-M3/86A under rated surge conditions?
The SMPC33A-M3/86A has a maximum clamping voltage (VC) of 53.3 V when subjected to its rated peak pulse current of 28.1 A using the standard 10/1000 μs waveform. This value is measured at the device terminals and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs rated for 33 V operation remain within safe operating area.
Is SMPC33A-M3/86A suitable for automotive applications requiring AEC-Q101 qualification?
The SMPC33A-M3/86A itself carries the industrial-grade M3 suffix and is not AEC-Q101 qualified. However, Vishay offers the functionally identical SMPC33ANHM3/86A variant with the HM3 suffix, which is fully AEC-Q101 qualified and shares the same electrical characteristics, package, and marking code PBA. For automotive designs, SMPC33ANHM3/86A is the compliant alternative.
What does the /86A package code indicate for SMPC33A-M3/86A?
The /86A suffix denotes the preferred tape-and-reel packaging format: 7-inch diameter plastic tape and reel containing 1500 units. This format is optimized for high-speed pick-and-place assembly and complies with EIA-481-D standards. The /86A code also specifies the mounting pad layout per JEDEC TO-277A and confirms the device's halogen-free, RoHS-compliant construction.
How does the dual-anode configuration of SMPC33A-M3/86A improve thermal performance?
The SMPC33A-M3/86A features two anode terminals (Anode 1 and Anode 2) electrically connected internally to reduce current density per bond wire and enhance heat spreading across the PCB copper pour. This design lowers effective thermal resistance - achieving RθJM ≤ 3.0 °C/W - and improves power handling stability during repetitive surge events compared to single-anode TVS diodes in similar packages.
Can SMPC33A-M3/86A be used in bidirectional transient protection circuits?
No - SMPC33A-M3/86A is strictly unidirectional and must be used only in DC-biased applications where reverse voltage is blocked. For bidirectional protection (e.g., AC signal lines or data buses), Vishay's SMPC33CA-M3/86A or equivalent symmetric TVS devices are required. Using SMPC33A-M3/86A in reverse-biased configurations risks premature conduction and failure due to lack of reverse standoff rating.
SMPC33A-M3/86A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- TO-277, 3-PowerDFN
- Series:
- TransZorb®, eSMP®
- 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)
SMPC33A-M3/86A FAQ
1.How can I place an order for SMPC33A-M3/86A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC33A-M3/86A 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 SMPC33A-M3/86A reliable?
The price and inventory of SMPC33A-M3/86A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC33A-M3/86A is usually 5 days.
3.What payment methods are accepted for SMPC33A-M3/86A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC33A-M3/86A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC33A-M3/86A?
SMPC33A-M3/86A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC33A-M3/86A 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 SMPC33A-M3/86A?
For technical support, including SMPC33A-M3/86A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC33A-M3/86A requirements.
6.How does Aetrix verify that SMPC33A-M3/86A is sourced from the original manufacturer or authorized distributors?
All SMPC33A-M3/86A 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 SMPC33A-M3/86A meets industry standards.
7.What is the process for return or replacement of SMPC33A-M3/86A?
All SMPC33A-M3/86A units undergo pre-shipment inspection (PSI). If there is an issue with SMPC33A-M3/86A, 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 SMPC33A-M3/86A part is unused and in its original packaging.
Return procedure for SMPC33A-M3/86A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMPC33A-M3/86A Tags
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