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Vishay General Semiconductor - Diodes Division SMPC33A-M3/87A
- Part No.:
- SMPC33A-M3/87A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC33A-M3/87A.pdf
- Description:
- TVS DIODE 33VWM 53.3VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:3,905
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Product details
Overview
SMPC33A-M3/87A from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor in SMPC (TO-277A) package, with 33.0 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR), and 1500 W peak pulse power (PPPM) capability. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive and industrial power electronics.
For engineers reviewing the SMPC33A-M3/87A datasheet, SMPC33A-M3/87A pinout, SMPC33A-M3/87A application, or SMPC33A-M3/87A equivalent, key selection criteria include clamping voltage (53.3 V at IPPM), unidirectional polarity, MSL Level 1 rating, AEC-Q101 qualification eligibility (via HM3 suffix), and compatibility with automated SMT placement on FR4 PCBs.
Technical Context
This device operates as a unidirectional avalanche diode, leveraging silicon p-n junction physics to clamp transient overvoltages above VWM while maintaining low leakage (<1.0 μA at 33.0 V). Its TO-277A package enables dual-anode/cathode terminal configuration for enhanced surge current handling without requiring external heatsinking under standard mounting conditions.
Thermal performance is defined by RθJA ≤ 100 °C/W (FR4, 2 oz copper) and RθJM ≤ 3.0 °C/W, supporting reliable operation up to TJ = 150 °C. The 10/1000 μs waveform compliance and derating per Figure 2 ensure predictable clamping behavior across ambient temperatures from –55 °C to +125 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.0 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 36.7 V / 40.6 V at 1.0 mA - Confirmed breakdown range ensures consistent turn-on threshold |
| VC at IPPM | 53.3 V - Clamped voltage during 28.1 A 10/1000 μs surge, defining worst-case protection level |
| PPPM | 1500 W - Peak transient power dissipation capability per standardized waveform |
| IR at VWM | ≤1.0 μA - Low leakage preserves signal integrity and minimizes standby power loss |
| TJ max | +150 °C - Maximum junction temperature enabling use in under-hood automotive environments |
| Package | SMPC (TO-277A) - 3-terminal surface-mount outline with 1.1 mm typical height for space-constrained layouts |
Pinout & Package
SMPC33A-M3/87A uses the SMPC (TO-277A) package: a 3-terminal surface-mount case with cathode band marking, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and UL 94 V-0 molding compound. Height is typically 1.1 mm, footprint matches JEDEC TO-277A mechanical dimensions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Primary anode connection | One of two parallel anode terminals; enables higher surge current sharing vs. single-anode devices |
| Anode 2 | Secondary anode connection | Electrically tied to Anode 1 internally; provides redundant path and improved thermal spreading |
| Cathode | Common cathode terminal | Marked with band; connects to protected circuit ground or return path; carries full IPPM during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile | 1.1 mm typical height - Enables use in ultra-thin modules and stacked PCB assemblies |
| Low incremental surge resistance | Ensures minimal voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a) |
| MSL Level 1 rating | Reflow-compatible up to 260 °C peak - Eliminates bake-out requirement for standard SMT processes |
| AEC-Q101 qualification path | Available with HM3 suffix - Supports automotive-grade reliability validation for powertrain and body electronics |
| Halogen-free & RoHS-compliant | M3 suffix denotes industrial-grade compliance - Meets environmental mandates for global OEM supply chains |
Applications
| Automotive Power Supply Protection | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V DC power rails in engine control units (ECUs) and body control modules (BCMs) from load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp transients exceeding 33 V. Use Value: 53.3 V clamping voltage limits stress on downstream 36 V-rated regulators and microcontrollers during ISO 16750-2 load dump events. |
Use Scenario: Shielding analog input channels and digital enable lines of motor drivers from EMI and commutation spikes in factory automation systems. IC Role / Device Role / Timing Role: Point-of-use TVS on signal traces connecting PLC outputs to gate drivers or current sense amplifiers. Use Value: Sub-1.1 mm height allows placement directly adjacent to connectors without interfering with shield cans or heatsinks. |
| Telecom Base Station DC Feeds | Consumer Appliance Power Switching |
Use Scenario: Safeguarding -48 V DC distribution boards in 5G remote radio units (RRUs) against lightning-induced surges on outdoor feeder lines. IC Role / Device Role / Timing Role: Primary-level unidirectional suppressor mounted at board edge before DC-DC converters. Use Value: 1500 W PPPM rating handles high-energy surges per IEC 61000-4-5 Combination Wave (10/700 μs) when used with series impedance. |
Use Scenario: Protecting triac gate drive circuits and microcontroller GPIOs in smart washing machines and HVAC controllers exposed to relay coil back-EMF. IC Role / Device Role / Timing Role: Localized TVS on PCB near relay sockets and optocoupler outputs. Use Value: 28.1 A IPPM capacity absorbs repetitive 100–500 A peak coil spikes without degradation over >10⁵ cycles. |
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; 33 V VWM; 53.3 V VC; 400 W PPPM (vs. 1500 W) | Limited to lower-energy transients; not suitable for load dump or high-current inductive switching | Select SMAJ33A-E3/5A only for cost-sensitive consumer applications with <500 W surge requirements. |
| SMCJ33AHE3/57T | DO-214AB package; 33 V VWM; 53.3 V VC; 1500 W PPPM; AEC-Q101 qualified | Same clamping and power rating but larger footprint (2.79 mm height); requires layout revision | Choose SMCJ33AHE3/57T when AEC-Q101 certification is mandatory and board space permits larger package. |
Compared with SMAJ33A-E3/5A and SMCJ33AHE3/57T, SMPC33A-M3/87A delivers identical 33 V/1500 W protection in a 1.1 mm low-profile SMPC package optimized for dense automotive and industrial PCBs-without sacrificing surge robustness or process compatibility.
Availability
SMPC33A-M3/87A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial motor drive I/O safeguarding, and telecom DC feed surge suppression requiring stable component supply, tape-and-reel logistics, and long-term lifecycle continuity.
Supply support for SMPC33A-M3/87A 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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMPC series was engineered for high-power transient suppression in space-constrained automotive and industrial systems, combining TO-277A's dual-anode thermal advantages with TransZORB® avalanche clamping precision.
FAQ
What is the maximum clamping voltage of SMPC33A-M3/87A under standard test conditions?
The SMPC33A-M3/87A has a maximum clamping voltage (VC) of 53.3 V when subjected to its rated peak pulse current (IPPM = 28.1 A) using a 10/1000 μs waveform. This value is measured at the device terminals and defines the upper voltage limit imposed on protected circuits during surge events, ensuring downstream components remain within safe operating margins.
Is SMPC33A-M3/87A qualified for automotive applications per AEC-Q101?
SMPC33A-M3/87A itself carries the industrial-grade M3 suffix and is not AEC-Q101 qualified. However, the functionally identical SMPC33ANHM3/87A variant-with HM3 suffix-is AEC-Q101 qualified and shares the same electrical characteristics, including 33.0 V VWM and 53.3 V VC. For automotive designs, specify the HM3 version to meet qualification requirements.
What does the /87A package code indicate for SMPC33A-M3/87A?
The /87A suffix denotes a 13-inch diameter plastic tape-and-reel packaging format containing 6500 units per reel. This delivery mode supports high-volume SMT assembly lines and is compatible with standard pick-and-place equipment. The /86A alternative offers the same device in 7-inch reels (1500 units), suited for prototyping or lower-volume production runs.
How does the dual-anode configuration of SMPC33A-M3/87A improve surge handling?
The SMPC33A-M3/87A features two anode terminals (Anode 1 and Anode 2) electrically connected in parallel inside the SMPC (TO-277A) package. This design reduces effective series resistance and improves current sharing during high-peak transients, lowering localized heating and enhancing reliability compared to single-anode equivalents like SMAJ or SMCJ series devices.
Can SMPC33A-M3/87A be used in bidirectional transient protection circuits?
No-SMPC33A-M3/87A is strictly unidirectional, as confirmed by its polarity marking (cathode band), datasheet specifications, and electrical characterization. For bidirectional protection, Vishay offers the SMPC33CA variant (complementary dual TVS), or discrete back-to-back configurations must be implemented externally. Using SMPC33A-M3/87A in reverse-biased AC applications risks permanent failure.
SMPC33A-M3/87A 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-M3/87A FAQ
1.How can I place an order for SMPC33A-M3/87A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC33A-M3/87A 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 SMPC33A-M3/87A reliable?
The price and inventory of SMPC33A-M3/87A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC33A-M3/87A is usually 5 days.
3.What payment methods are accepted for SMPC33A-M3/87A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC33A-M3/87A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC33A-M3/87A?
SMPC33A-M3/87A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC33A-M3/87A 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 SMPC33A-M3/87A?
For technical support, including SMPC33A-M3/87A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC33A-M3/87A requirements.
6.How does Aetrix verify that SMPC33A-M3/87A is sourced from the original manufacturer or authorized distributors?
All SMPC33A-M3/87A 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 SMPC33A-M3/87A meets industry standards.
7.What is the process for return or replacement of SMPC33A-M3/87A?
All SMPC33A-M3/87A units undergo pre-shipment inspection (PSI). If there is an issue with SMPC33A-M3/87A, 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 SMPC33A-M3/87A part is unused and in its original packaging.
Return procedure for SMPC33A-M3/87A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMPC33A-M3/87A Tags
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