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Vishay General Semiconductor - Diodes Division SMPC43AN-M3/H
- Part No.:
- SMPC43AN-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC43AN-M3/H.pdf
- Description:
- TVS DIODE 43VWM 69.4VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:2,429
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Product details
Overview
SMPC43AN-M3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in the eSMP® Series, designed for clamping inductive-switching transients on power and signal lines. It features a 43.0 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR), 69.4 V maximum clamping voltage (VC) at 21.6 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with a 10/1000 μs waveform.
For engineers reviewing the SMPC43AN-M3/H datasheet, SMPC43AN-M3/H pinout, SMPC43AN-M3/H application, or SMPC43AN-M3/H equivalent, this device is selected for automotive-grade transient protection where low-profile mounting, AEC-Q101 qualification, and high surge robustness are required - especially in sensor interface, power rail, and MOSFET gate protection circuits.
Technical Context
This TVS diode operates in unidirectional mode with cathode-band polarity marking and uses a TO-277A (SMPC) package optimized for thermal performance on FR4 PCBs. Its junction-to-mount thermal resistance is 2.5 °C/W, enabling effective heat transfer when mounted to heatsink pads - critical for sustaining repetitive surge events in automotive power electronics.
The device meets JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1 (260 °C peak reflow), supporting automated SMT assembly. With 1.0 μA max reverse leakage at VWM and 150 °C max junction temperature, it supports reliable operation across industrial and automotive ambient ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43.0 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC bias margin for protected circuitry. |
| VBR (min/max) | 47.8 V / 52.8 V - Breakdown threshold range at 1 mA test current; ensures predictable turn-on under transient overvoltage. |
| VC @ IPPM | 69.4 V - Clamped voltage at 21.6 A peak pulse current; determines worst-case stress on downstream components during surge. |
| PPPM | 1500 W - Peak pulse power handling with 10/1000 μs waveform; enables suppression of high-energy transients like ISO 7637-2 Pulse 1/2a/5a. |
| IR @ VWM | 1.0 μA - Reverse leakage at rated stand-off voltage; minimizes standby power loss and avoids false triggering in low-current sensor paths. |
| TJ max | +150 °C - Maximum junction temperature; supports under-hood automotive deployment without derating in most PCB layouts. |
| Package | SMPC (TO-277A) - 3-terminal surface-mount package with dual anode/cathode configuration; enables bidirectional layout flexibility using single-polarity devices. |
Pinout & Package
SMPC43AN-M3/H uses the SMPC (TO-277A) package: a 3-terminal, low-profile (1.1 mm typical height), halogen-free, RoHS-compliant surface-mount outline conforming to JEDEC TO-277A. Terminals are matte tin-plated and solderable per J-STD-002 and JESD22-B102. Polarity is marked by a cathode band denoting the cathode end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 / Anode 2 | Common anode connection points | Electrically tied internally; allows flexible PCB routing with dual pad access for improved current sharing and thermal spreading. |
| Cathode | Clamping output terminal | Connected to protected line (e.g., power rail or signal); conducts surge current to ground when VWM is exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping | Enables precise protection of positive-rail circuits without affecting normal forward-biased operation of downstream components. |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces per stress test requirements. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving clamping accuracy and reducing stress on protected ICs and MOSFETs. |
| MSL Level 1 rating | Supports standard SMT reflow profiles up to 260 °C peak without preconditioning, simplifying manufacturing integration. |
| Halogen-free & RoHS-compliant | Meets global environmental compliance mandates for automotive and industrial end equipment without compromising surge performance. |
Applications
| Automotive Sensor Protection | Power Rail Surge Suppression |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and ground to clamp ESD and ISO 10605/7637-2 pulses before they reach sensitive input stages. Use Value: Limits clamped voltage to 69.4 V while handling 21.6 A surges, preserving signal integrity and preventing latch-up in 5 V or 12 V sensor interfaces. |
Use Scenario: Safeguarding 48 V or 12 V power distribution networks in ADAS modules and infotainment systems against alternator load dump and jump-start spikes. IC Role / Device Role / Timing Role: Primary front-end TVS on main power input, coordinated with upstream fuses and downstream DC-DC converters. Use Value: Absorbs 1500 W peak pulse energy with <1 ns response time, preventing overvoltage propagation to downstream regulators and microcontrollers. |
| MOSFET Gate Protection | Industrial I/O Interface Protection |
|
Use Scenario: Shielding high-side and low-side N-channel MOSFET gates in motor drivers and power supplies from Miller-induced voltage spikes and gate oxide overstress. IC Role / Device Role / Timing Role: Placed between gate and source terminals to clamp transient excursions exceeding VGS(max) without adding capacitance that degrades switching speed. Use Value: Delivers 69.4 V clamping at 21.6 A with minimal junction capacitance (<100 pF at zero bias), preserving PWM fidelity and gate drive timing. |
Use Scenario: Hardening RS-485, RS-232, and digital I/O lines in PLCs, HMIs, and factory automation controllers exposed to lightning-induced surges and ground potential differences. IC Role / Device Role / Timing Role: Point-of-entry TVS on each signal line, referenced to local ground, providing first-stage protection ahead of integrated ESD structures. Use Value: Maintains 1.0 μA leakage at 43 V stand-off, ensuring compatibility with high-impedance logic inputs and avoiding false triggering in noise-sensitive environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppressor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A-E3/5A (Vishay) | Same VWM (43 V) and VC (69.4 V), but SMA package (higher RθJA = 140 °C/W), lower PPPM (400 W), and non-AEC-Q101. | Not suitable for under-hood automotive use; limited to consumer/industrial board-level protection with lower surge duty cycles. | Select SMAJ43A-E3/5A only if cost sensitivity outweighs thermal and automotive qualification requirements. |
| 1.5SMC43A (ON Semiconductor) | Same VWM (43 V) and comparable VC (69.4 V), but SMC package (3.5 mm height), higher RθJA (100 °C/W), and no AEC-Q101 certification. | Lacks automotive qualification and has larger footprint; better suited for non-automotive industrial power supplies with less stringent space constraints. | Choose 1.5SMC43A when board height >1.1 mm is acceptable and AEC-Q101 is not mandated. |
Compared with SMAJ43A-E3/5A and 1.5SMC43A, SMPC43AN-M3/H delivers superior thermal performance (RθJM = 2.5 °C/W), automotive qualification, and ultra-low profile - making it the preferred choice for space-constrained, high-reliability automotive power and signal line protection.
Availability
SMPC43AN-M3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, power rail surge suppression, and industrial I/O protection requiring stable component supply, AEC-Q101 compliance, and consistent lead-time visibility.
Supply support for SMPC43AN-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMPC series targets high-surge, low-profile transient protection in automotive and industrial systems - engineered for AEC-Q101 compliance, automated assembly, and thermal robustness in dense PCB layouts.
FAQ
What is the clamping voltage of SMPC43AN-M3/H at its rated peak pulse current?
The SMPC43AN-M3/H has a maximum clamping voltage (VC) of 69.4 V at its specified peak pulse current (IPPM) of 21.6 A, measured with a 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed in the Vishay datasheet Document Number 89116, Table on page 2.
Is SMPC43AN-M3/H qualified for automotive applications?
Yes, SMPC43AN-M3/H is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet under "FEATURES" and "ORDERING INFORMATION". The "HM3" suffix denotes AEC-Q101 qualification, and SMPC43AN falls within the SMPC22AN–SMPC85AN range specified for automotive-grade variants.
What does the "/H" suffix mean in SMPC43AN-M3/H?
The "/H" suffix in SMPC43AN-M3/H indicates the preferred package code for 7-inch diameter plastic tape and reel delivery, with a base quantity of 1500 units per reel. This is defined in the "ORDERING INFORMATION" section of the Vishay datasheet (page 3), and does not affect electrical or thermal specifications.
How does the SMPC (TO-277A) package improve thermal performance compared to SMA or SMC?
The SMPC (TO-277A) package used by SMPC43AN-M3/H achieves a typical junction-to-mount thermal resistance (RθJM) of 2.5 °C/W - significantly lower than SMA (≈50 °C/W) or SMC (≈30 °C/W) - due to its exposed metal pad design and optimized thermal path to PCB copper. This enables higher sustained surge capability in thermally constrained layouts.
Can SMPC43AN-M3/H be used in bidirectional protection configurations?
No - SMPC43AN-M3/H is strictly unidirectional, as confirmed in both the "FEATURES" and "PRIMARY CHARACTERISTICS" sections of the datasheet. For bidirectional protection, two SMPC43AN-M3/H devices must be connected in series opposition, or a dedicated bidirectional variant (e.g., SMPC43CA) should be selected.
SMPC43AN-M3/H 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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 21.6A
- 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)
SMPC43AN-M3/H FAQ
1.How can I place an order for SMPC43AN-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC43AN-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 SMPC43AN-M3/H reliable?
The price and inventory of SMPC43AN-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 SMPC43AN-M3/H is usually 5 days.
3.What payment methods are accepted for SMPC43AN-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC43AN-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC43AN-M3/H?
SMPC43AN-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC43AN-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 SMPC43AN-M3/H?
For technical support, including SMPC43AN-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC43AN-M3/H requirements.
6.How does Aetrix verify that SMPC43AN-M3/H is sourced from the original manufacturer or authorized distributors?
All SMPC43AN-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 SMPC43AN-M3/H meets industry standards.
7.What is the process for return or replacement of SMPC43AN-M3/H?
All SMPC43AN-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMPC43AN-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 SMPC43AN-M3/H part is unused and in its original packaging.
Return procedure for SMPC43AN-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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