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Vishay General Semiconductor - Diodes Division SMPC40AN-M3/H
- Part No.:
- SMPC40AN-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC40AN-M3/H.pdf
- Description:
- TVS DIODE 40VWM 64.5VC TO277A
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMPC40AN-M3/H from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor in the SMPC (TO-277A) package, rated for 40 V stand-off voltage (VWM), 64.5 V maximum clamping voltage (VC) at 23.3 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics against inductive switching transients.
For engineers reviewing the SMPC40AN-M3/H datasheet, SMPC40AN-M3/H pinout, SMPC40AN-M3/H application, or SMPC40AN-M3/H equivalent, this device is selected for high-energy surge suppression where low-profile mounting (1.1 mm height), AEC-Q101 qualification, and halogen-free RoHS-compliant construction are required in space-constrained PCB layouts.
Technical Context
This unidirectional TVS diode operates by avalanche breakdown above its 44.4–49.1 V breakdown voltage (VBR) at 1 mA test current, clamping transients to ≤64.5 V within nanoseconds. Its low incremental surge resistance and fast response time ensure minimal overvoltage exposure to downstream circuitry during ESD or load-dump events.
Designed for thermal reliability on FR4 PCBs with 2 oz copper, it features a junction-to-ambient thermal resistance (RθJA) of 85–100 °C/W and supports continuous operation up to +150 °C junction temperature. The cathode-band-marked SMPC (TO-277A) package enables automated placement and meets J-STD-020 MSL Level 1 reflow compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum reverse stand-off voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR min/max | 44.4 V / 49.1 V - Breakdown voltage range at 1 mA; ensures consistent turn-on behavior across production lots. |
| VC @ IPPM | 64.5 V - Clamping voltage at 23.3 A peak pulse current; determines worst-case overvoltage seen by protected IC. |
| PPPM | 1500 W - Peak pulse power handling with 10/1000 μs waveform; quantifies single-event surge energy absorption capability. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments. |
| Package | SMPC (TO-277A) - 3-terminal surface-mount package with 1.1 mm profile; optimized for high-density layout and automated assembly. |
| Polarity | Unidirectional - Cathode-band marked; provides asymmetric protection suitable for DC-biased lines like power rails or gate drivers. |
Pinout & Package
SMPC40AN-M3/H 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. Mounting pad layout follows Vishay-recommended dimensions (0.268" × 0.186" pad area).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Primary anode connection | One of two parallel anode terminals; shares current path with Anode 2 to reduce effective series resistance during surge. |
| Anode 2 | Secondary anode connection | Redundant anode terminal electrically tied internally; improves current sharing and thermal distribution under high IPPM. |
| Cathode | Common cathode node | Single cathode terminal marked by band; serves as reference point for clamping action toward ground or negative rail. |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile | 1.1 mm typical height - Enables integration into ultra-thin modules and stacked PCB assemblies without mechanical interference. |
| AEC-Q101 qualified | Automotive-grade reliability - Validated for automotive powertrain and body electronics per stress-test requirements including temperature cycling and HTRB. |
| Halogen-free & RoHS | M3 suffix compliance - Meets environmental regulations for industrial and consumer end equipment without compromising surge performance. |
| Low incremental surge resistance | Enables tighter clamping - Reduces VC rise under high di/dt transients, improving protection margin for sensitive 3.3 V or 5 V logic interfaces. |
| MSL Level 1 | 260 °C peak reflow compatibility - Supports standard lead-free SMT processes without preconditioning or special handling. |
Applications
| Automotive Power Distribution | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Protecting gate drivers and MCU I/O in 12 V/24 V vehicle power distribution modules subject to ISO 7637-2 load dump pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between gate driver output and MOSFET gate to clamp inductive kickback and prevent gate oxide rupture. Use Value: With 64.5 V clamping at 23.3 A, SMPC40AN-M3/H limits gate overvoltage below 70 V, preserving 100 V-rated Si MOSFETs during 120 V load dump events. |
Use Scenario: Safeguarding encoder signal lines and analog sensor inputs in servo drives exposed to commutation noise and back-EMF spikes. IC Role / Device Role / Timing Role: TVS mounted at connector interface to shunt fast-rising transients (<1 ns rise time) before they couple into differential receivers. Use Value: Sub-1.1 mm height allows placement directly at board edge connectors without interfering with shield cans or adjacent components. |
| Telecom DC Power Input | Consumer Appliance Control Board |
Use Scenario: Surge protection on 48 V DC input rails of telecom base station power supplies compliant with IEC 61000-4-5 Level 4 (4 kV line-earth). IC Role / Device Role / Timing Role: Primary clamping device upstream of DC-DC converters, absorbing bulk surge energy before regulation stage. Use Value: 1500 W PPPM rating enables single-device handling of 4 kV/2 Ω combination wave surges without cascading failure. |
Use Scenario: Protecting microcontroller reset and communication pins (UART, I²C) in smart home appliances subjected to ESD and relay contact bounce. IC Role / Device Role / Timing Role: Localized TVS on PCB near MCU pins to provide sub-nanosecond response to human-body-model (HBM) ESD events. Use Value: Unidirectional configuration avoids leakage current on 3.3 V supply lines, maintaining low quiescent power in battery-backed systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ40A-E3/5A (Vishay) | DO-214AC package; 40 V VWM; 64.5 V VC; 400 W PPPM - lower power rating, 2-pin unidirectional. | Limited to lower-energy transients; not suitable for ISO 7637-2 load dump or IEC 61000-4-5 Level 4. | Select when board space permits larger footprint and surge energy is <400 W. |
| SMCJ40A-M3/86A (Vishay) | SMC (DO-214AB) package; same 40 V VWM and 64.5 V VC; 1500 W PPPM - identical electrical specs, larger 2.5 mm height. | Higher thermal mass but incompatible with ultra-low-profile designs; requires revised stencil and placement settings. | Select when higher RθJM (2.5 °C/W) and manual rework tolerance are prioritized over height constraint. |
Compared with SMAJ40A-E3/5A, SMPC40AN-M3/H delivers 3.75× higher surge power handling in half the height; versus SMCJ40A-M3/86A, it achieves equivalent PPPM in a 1.1 mm profile-critical for next-gen automotive ECUs and compact industrial controllers.
Availability
SMPC40AN-M3/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive protection, and telecom DC power input applications requiring stable component supply, AEC-Q101 qualification, and halogen-free compliance.
Supply support for SMPC40AN-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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMPC series targets high-energy transient suppression in space-constrained automotive and industrial systems, combining AEC-Q101 qualification, low-profile packaging, and robust 1500 W surge capability for next-generation power electronics.
FAQ
What is the clamping voltage of SMPC40AN-M3/H at its rated peak pulse current?
The SMPC40AN-M3/H has a maximum clamping voltage (VC) of 64.5 V at its rated peak pulse current (IPPM) of 23.3 A with 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 surge events. The SMPC40AN-M3/H maintains this clamping performance across its specified operating temperature range.
Is SMPC40AN-M3/H qualified for automotive applications?
Yes, SMPC40AN-M3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" variant and documentation stating AEC-Q101 qualification applies to SMPC22AN through SMPC85AN. The SMPC40AN-M3/H meets stress test requirements for automotive powertrain and body electronics, including temperature cycling, high-temperature reverse bias, and humidity testing.
What does the "/H" suffix indicate in SMPC40AN-M3/H?
The "/H" suffix in SMPC40AN-M3/H denotes the preferred package code for 7-inch diameter plastic tape and reel delivery, containing 1500 units per reel. This packaging format is optimized for high-volume SMT assembly and aligns with Vishay's standard ordering information table in document 89116. The "/H" does not affect electrical or thermal specifications of the SMPC40AN-M3/H device itself.
How does the SMPC40AN-M3/H differ from bidirectional TVS diodes?
SMPC40AN-M3/H is unidirectional, meaning it conducts only when the cathode is positive relative to the anodes-ideal for DC-biased lines like power rails or gate drivers. Bidirectional TVS diodes conduct for both polarities and are used on AC or floating signal lines. The SMPC40AN-M3/H's unidirectional design yields lower leakage current (<1 μA at 40 V) compared to bidirectional equivalents, preserving system efficiency in always-on circuits.
What is the thermal resistance specification for SMPC40AN-M3/H?
The SMPC40AN-M3/H has a typical junction-to-ambient thermal resistance (RθJA) of 85 °C/W and a maximum of 100 °C/W when mounted on a standard FR4 PCB with 2 oz copper, per JEDEC 51-2A. Its junction-to-mount thermal resistance (RθJM) is 2.5 °C/W typical (max 3 °C/W), enabling efficient heat transfer to heatsink-equipped layouts. These values are critical for calculating steady-state power derating above 25 °C ambient.
SMPC40AN-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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 23.3A
- 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)
SMPC40AN-M3/H FAQ
1.How can I place an order for SMPC40AN-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC40AN-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 SMPC40AN-M3/H reliable?
The price and inventory of SMPC40AN-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 SMPC40AN-M3/H is usually 5 days.
3.What payment methods are accepted for SMPC40AN-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC40AN-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC40AN-M3/H?
SMPC40AN-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC40AN-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 SMPC40AN-M3/H?
For technical support, including SMPC40AN-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC40AN-M3/H requirements.
6.How does Aetrix verify that SMPC40AN-M3/H is sourced from the original manufacturer or authorized distributors?
All SMPC40AN-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 SMPC40AN-M3/H meets industry standards.
7.What is the process for return or replacement of SMPC40AN-M3/H?
All SMPC40AN-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMPC40AN-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 SMPC40AN-M3/H part is unused and in its original packaging.
Return procedure for SMPC40AN-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMPC40AN-M3/H Tags
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