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Vishay General Semiconductor - Diodes Division SMPC33AN-M3/H
- Part No.:
- SMPC33AN-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC33AN-M3/H.pdf
- Description:
- TVS DIODE 33VWM 53.3VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:5,490
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Product details
Overview
SMPC33AN-M3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in the eSMP® Series, designed for high-energy surge protection with 33 V stand-off voltage, 53.3 V clamping voltage at 28.1 A peak pulse current, and 1500 W peak pulse power rating. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMPC33AN-M3/H datasheet, SMPC33AN-M3/H pinout, SMPC33AN-M3/H application, or SMPC33AN-M3/H equivalent, key selection criteria include unidirectional polarity, TO-277A (SMPC) package compatibility, AEC-Q101 qualification status, and thermal resistance (RθJA = 100 °C/W) under FR4 PCB mounting conditions.
Technical Context
This TVS diode operates as a clamping device triggered by reverse-biased avalanche breakdown above its 36.7–40.6 V breakdown voltage range (VBR at 1 mA), limiting transient overvoltages to ≤53.3 V while handling 10/1000 μs waveform surges up to 28.1 A. Its low incremental surge resistance ensures minimal voltage overshoot during fast transients.
The SMPC33AN-M3/H uses a dual-anode/single-cathode configuration in the SMPC (TO-277A) package, where the cathode band denotes polarity and both anode terminals must be connected identically per design note. It meets J-STD-020 MSL Level 1 and JESD 201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.0 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VBR min/max | 36.7 V / 40.6 V - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 53.3 V - Clamped voltage across device at 28.1 A peak pulse current, limiting downstream stress |
| PPPM | 1500 W - Peak pulse power dissipation capability with 10/1000 μs waveform, critical for lightning/surge immunity |
| TJ max | +150 °C - Maximum junction temperature, enabling operation in under-hood automotive environments |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard FR4 PCB, guiding heatsinking needs |
Pinout & Package
Package: SMPC (TO-277A), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified, 1.1 mm typical height, matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Current entry terminal (reverse bias) | Must be connected identically to Anode 2; shared path for surge current into cathode |
| Anode 2 | Current entry terminal (reverse bias) | Electrically parallel to Anode 1; enables higher surge current handling via dual-terminal layout |
| Cathode | Current exit terminal (reverse bias) | Marked with band; connects to protected circuit ground or return path during clamping event |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (1.1 mm height) | Enables use in space-constrained automotive ECUs and portable industrial sensors without compromising board clearance |
| Unidirectional polarity | Protects against negative-going transients only; avoids forward conduction during normal DC bias operation |
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and body electronics per stress test requirements |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., load dump, inductive switching) |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without preconditioning, reducing manufacturing complexity |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Interface |
|---|---|
Use Scenario: Protecting microcontroller I/O and gate driver inputs from load-dump and alternator ripple transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: TVS clamping device placed at signal entry points to absorb >100 V spikes before they reach sensitive logic or power stages. Use Value: Enables reliable operation of SMPC33AN-M3/H in AEC-Q101-compliant ECUs without derating for temperature or surge repetition. | Use Scenario: Safeguarding encoder feedback lines and analog sensor inputs in variable-frequency drives exposed to motor commutation noise. IC Role / Device Role / Timing Role: Unidirectional transient suppressor mounted directly at connector interface to shunt EMI-induced surges to chassis ground. Use Value: Maintains signal integrity below 53.3 V clamping level, preventing false triggering or ADC saturation in 24 V industrial control systems. |
| Telecom Power Supply Input | Consumer Appliance Mainboard Protection |
Use Scenario: Guarding primary-side controller ICs and MOSFET gates against lightning-induced surges on AC/DC adapter inputs. IC Role / Device Role / Timing Role: High-power TVS placed across bulk capacitor input to clamp line-to-ground transients before rectification stage. Use Value: Withstands 1500 W peak pulse power, allowing compliance with IEC 61000-4-5 Level 4 (4 kV) surge testing. | Use Scenario: Shielding MCU reset lines and communication buses (e.g., I²C) from ESD and relay-switching transients in smart home appliances. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) unidirectional TVS integrated near connectors to prevent latch-up in 3.3 V/5 V logic rails. Use Value: Delivers sub-10 ns response time and <1 μA leakage at 33 V, preserving battery life and signal fidelity in always-on devices. |
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, same PPPM but RθJA = 125 °C/W | Larger footprint, lower thermal performance; not AEC-Q101 qualified | Choose SMAJ33A-E3/5A only if board space allows larger package and automotive qualification is unnecessary |
| SMCJ33AHE3/57T | DO-214AB package, 33 V VWM, 53.3 V VC, PPPM = 1500 W, RθJA = 100 °C/W, AEC-Q101 qualified | Same thermal and electrical specs but 2.3 mm height vs. SMPC33AN-M3/H's 1.1 mm - impacts low-profile designs | Select SMCJ33AHE3/57T when higher mechanical robustness is needed, but avoid where Z-height is constrained |
Compared with SMAJ33A-E3/5A and SMCJ33AHE3/57T, SMPC33AN-M3/H offers identical clamping and surge ratings in the lowest-profile AEC-Q101-qualified package, making it optimal for next-generation compact automotive modules where vertical space is limited.
Availability
SMPC33AN-M3/H is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drive interfaces, and telecom power supply inputs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMPC33AN-M3/H 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 and automotive-grade validation.
The eSMP® Series, including SMPC33AN-M3/H, was engineered for high-power transient suppression in space-constrained, thermally demanding environments such as automotive powertrain and industrial automation systems.
FAQ
What is the polarity configuration of SMPC33AN-M3/H?
The SMPC33AN-M3/H is a unidirectional TVS diode with dual-anode and single-cathode terminals. The cathode is marked by a band on the package body, and both anode terminals must be connected identically in the circuit to ensure proper surge current sharing and clamping behavior per Vishay documentation.
Is SMPC33AN-M3/H qualified for automotive applications?
Yes, SMPC33AN-M3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" variant and explicit listing in the "AEC-Q101 qualified available" feature section. This qualification covers stress tests including temperature cycling, humidity bias, and mechanical shock required for under-hood and chassis-mounted automotive electronics.
What is the maximum clamping voltage of SMPC33AN-M3/H at rated surge current?
The maximum clamping voltage of SMPC33AN-M3/H is 53.3 V at 28.1 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured across the device terminals during standardized surge testing and defines the upper voltage limit imposed on protected circuitry during transient events.
Does SMPC33AN-M3/H require special PCB layout considerations?
Yes - SMPC33AN-M3/H requires symmetric, low-inductance routing to both anode pads and a short, wide trace to the cathode pad to maintain balanced current sharing. Vishay's recommended mounting pad layout specifies 0.268" × 0.186" dimensions with 0.050" minimum solder mask opening to ensure thermal and electrical performance consistency.
What is the thermal resistance of SMPC33AN-M3/H under standard mounting conditions?
The SMPC33AN-M3/H has a maximum junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on a standard FR4 PCB with 2 oz. copper and Vishay's specified footprint. This value is critical for calculating safe power derating above 25 °C ambient and ensuring junction temperature remains below 150 °C during repeated surge events.
SMPC33AN-M3/H 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/H FAQ
1.How can I place an order for SMPC33AN-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC33AN-M3/H 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/H reliable?
The price and inventory of SMPC33AN-M3/H 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/H is usually 5 days.
3.What payment methods are accepted for SMPC33AN-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC33AN-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC33AN-M3/H?
SMPC33AN-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC33AN-M3/H 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/H?
For technical support, including SMPC33AN-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC33AN-M3/H requirements.
6.How does Aetrix verify that SMPC33AN-M3/H is sourced from the original manufacturer or authorized distributors?
All SMPC33AN-M3/H 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/H meets industry standards.
7.What is the process for return or replacement of SMPC33AN-M3/H?
All SMPC33AN-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMPC33AN-M3/H, 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/H part is unused and in its original packaging.
Return procedure for SMPC33AN-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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