My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMPC40AN-M3/I
- Part No.:
- SMPC40AN-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC40AN-M3/I.pdf
- Description:
- TVS DIODE 40VWM 64.5VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:2,961
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMPC40AN-M3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in the SMPC (TO-277A) package, designed for clamping fast voltage transients on power and signal lines. It features a 40 V stand-off voltage (VWM), 44.4–49.1 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), and 64.5 V maximum clamping voltage (VC) at 23.3 A IPPM - ideal for protecting automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the SMPC40AN-M3/I datasheet, SMPC40AN-M3/I pinout, SMPC40AN-M3/I application, or SMPC40AN-M3/I equivalent, key selection criteria include its AEC-Q101 qualification (via HM3 suffix variants), low-profile 1.1 mm height, MSL Level 1 rating, and unidirectional polarity with cathode band identification - all critical for high-reliability automotive and industrial PCB designs.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging avalanche breakdown to limit transient overvoltages before they damage downstream ICs or MOSFETs. Its low incremental surge resistance and sub-nanosecond response time ensure effective suppression of ESD, load dump, and inductive switching spikes.
The SMPC40AN-M3/I uses a dual-anode/single-cathode configuration in the SMPC (TO-277A) package, where the cathode band denotes the common terminal. Thermal performance is characterized by RθJA ≤ 100 °C/W (FR4, 2 oz copper) and TJ max = 150 °C, supporting operation in under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 44.4 V / 49.1 V at 1 mA - guaranteed avalanche onset range for reliable triggering |
| VC @ IPPM | 64.5 V at 23.3 A - clamped voltage during 10/1000 μs surge, defining protected circuit stress level |
| PPPM | 1500 W - peak transient energy handling capability per standard 10/1000 μs waveform |
| IR @ VWM | 1.0 μA - leakage current at rated stand-off, ensuring minimal standby power loss |
| TJ max | +150 °C - maximum junction temperature enabling use in high-ambient automotive applications |
| Package | SMPC (TO-277A) - 3-terminal surface-mount outline with 1.1 mm profile for automated placement |
Pinout & Package
SMPC40AN-M3/I uses the SMPC (TO-277A) package: a 3-terminal, low-profile surface-mount case with matte tin-plated leads, UL 94 V-0 molding compound, and cathode band marking. Dimensions: 4.80 × 3.70 × 1.10 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Input/Line terminal | One of two parallel anode connections; tied together internally for enhanced surge current sharing |
| Anode 2 | Input/Line terminal | Second anode terminal - electrically identical to Anode 1; used for layout symmetry and thermal spreading |
| Cathode | Common reference terminal | Marked with band; connects to system ground or low-side return path during clamping event |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping | Enables precise protection of DC-biased lines without forward conduction during normal operation |
| AEC-Q101 qualified variant available | SMPC40ANHM3/I meets automotive reliability standards for sensor and ECU protection |
| MSL Level 1, 260 °C peak reflow | Supports lead-free assembly without moisture-related popcorn failure risk |
| Low 1.1 mm profile | Reduces board space and improves airflow in dense power modules and ADAS ECUs |
| Halogen-free, RoHS-compliant | Fulfills environmental compliance requirements for global industrial and automotive markets |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load-dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients before reaching sensitive input pins. Use Value: Limits clamped voltage to 64.5 V while handling 1500 W surges, preserving signal integrity and preventing latch-up in 5 V/12 V sensor interfaces. | Use Scenario: Safeguarding PLC digital input modules against field-induced surges from solenoid switching and motor drive noise. IC Role / Device Role / Timing Role: Standoff-rated TVS on 24 V DC input lines, absorbing repetitive transients without degradation. Use Value: 40 V VWM ensures compatibility with 24 V nominal systems; 1.0 μA IR minimizes loading on optocoupler bias networks. |
| Power Supply Rail Clamping | Telecom Line Interface |
Use Scenario: Secondary overvoltage protection on DC-DC converter outputs feeding microcontrollers or FPGAs in base station power supplies. IC Role / Device Role / Timing Role: Fast-response clamping device placed after primary regulation to suppress switching noise and cross-talk spikes. Use Value: 64.5 V VC ensures safe margin below 75 V absolute maximum ratings of many PMICs and logic devices. | Use Scenario: Protecting Ethernet PHY interface circuits (e.g., MDI lines) from lightning-induced surges in outdoor telecom equipment. IC Role / Device Role / Timing Role: Unidirectional TVS on transformer-coupled data lines, referenced to local ground plane. Use Value: 1500 W PPPM meets IEC 61000-4-5 Level 3 (1 kV/2 Ω) test requirements for secondary-side protection. |
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-E3/5AT | DO-214AC (SMA) package; 40 V VWM; 64.5 V VC; same PPPM but higher RθJA (~150 °C/W) | Larger footprint and lower thermal efficiency; not AEC-Q101 qualified in standard grade | Choose SMAJ40A-E3/5AT only if SMPC footprint is unavailable and thermal derating is acceptable |
| SMCJ40A-M3/86A | SMC (DO-214AB) package; same electrical specs but 2.3 mm height and higher PD (5.0 W) | Higher power dissipation supports longer surge durations; less suitable for ultra-thin modules | Prefer SMCJ40A-M3/86A when board space allows and sustained surge immunity is prioritized over profile |
Compared with SMAJ40A-E3/5AT and SMCJ40A-M3/86A, the SMPC40AN-M3/I delivers superior thermal performance in constrained spaces due to its 1.1 mm height and TO-277A copper slug construction, while maintaining identical clamping behavior - making it optimal for next-gen automotive ADAS modules and compact industrial controllers.
Availability
SMPC40AN-M3/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and telecom line surge suppression requiring stable component supply across production lifecycles.
Supply support for SMPC40AN-M3/I 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 automotive-grade qualification.
The SMPC series was developed specifically for high-density, high-reliability transient suppression in automotive and industrial applications - combining low profile, AEC-Q101 readiness, and robust 1500 W surge capability in a thermally optimized surface-mount package.
FAQ
What is the polarity configuration of SMPC40AN-M3/I?
The SMPC40AN-M3/I is a unidirectional TVS diode with a dual-anode/single-cathode structure. The cathode is marked by a band on the package body and must be connected to the system ground or low-side reference. This configuration ensures clamping only during positive transients relative to ground, making it suitable for DC-biased lines like automotive 12 V supplies or 24 V industrial inputs. The SMPC40AN-M3/I does not conduct in forward bias under normal operation.
Is SMPC40AN-M3/I AEC-Q101 qualified?
No - the SMPC40AN-M3/I is the industrial-grade version with halogen-free, RoHS-compliant construction and MSL Level 1 rating. AEC-Q101 qualification applies only to variants with the HM3 suffix (e.g., SMPC40ANHM3/I). The SMPC40AN-M3/I meets all electrical and mechanical specifications of the family but lacks the extended temperature cycling, humidity testing, and failure analysis required for automotive qualification. For AEC-Q101 compliance, specify SMPC40ANHM3/I.
What is the mounting pad layout recommendation for SMPC40AN-M3/I?
Vishay specifies a minimum pad layout of 4.80 mm × 3.40 mm (length × width) with 1.27 mm solder mask clearance and 1.04 mm conductor spacing. The cathode pad should be thermally connected to a large copper pour to enhance heat dissipation during surge events. The SMPC40AN-M3/I's TO-277A outline requires symmetric anode pads to balance solder wetting and prevent tombstoning during reflow. Refer to Document Number 89116, page 5, for exact dimensions and land pattern tolerances.
How does SMPC40AN-M3/I compare to SMPC40A in terms of electrical performance?
The SMPC40AN-M3/I and SMPC40A share identical VWM (40 V), VBR (44.4–49.1 V), VC (64.5 V), and PPPM (1500 W) specifications. The "N" suffix denotes the anode-cathode orientation variant (cathode on heatsink configuration), while non-N versions have anode on heatsink. Both use the same SMPC package and materials. The SMPC40AN-M3/I is optimized for cathode-grounded layouts - common in automotive sensor interfaces - whereas SMPC40A suits anode-grounded configurations. Electrical behavior is functionally interchangeable when mounted per respective thermal orientation.
What is the surge current rating for SMPC40AN-M3/I at elevated ambient temperatures?
At TA = 85 °C, the SMPC40AN-M3/I's peak pulse current (IPPM) is derated to approximately 16.5 A - calculated from the 23.3 A rating at 25 °C using the derating curve in Figure 2 of Document 89116. This corresponds to ~71 % of full rating, maintaining 1500 W PPPM capability only at lower pulse widths or reduced duty cycles. For continuous operation above 70 °C ambient, thermal design must ensure TJ remains ≤ 150 °C using PCB copper area and airflow - the SMPC40AN-M3/I's RθJA ≤ 100 °C/W defines this thermal boundary.
SMPC40AN-M3/I 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):
- 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/I FAQ
1.How can I place an order for SMPC40AN-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC40AN-M3/I 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/I reliable?
The price and inventory of SMPC40AN-M3/I 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/I is usually 5 days.
3.What payment methods are accepted for SMPC40AN-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC40AN-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC40AN-M3/I?
SMPC40AN-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC40AN-M3/I 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/I?
For technical support, including SMPC40AN-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC40AN-M3/I requirements.
6.How does Aetrix verify that SMPC40AN-M3/I is sourced from the original manufacturer or authorized distributors?
All SMPC40AN-M3/I 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/I meets industry standards.
7.What is the process for return or replacement of SMPC40AN-M3/I?
All SMPC40AN-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMPC40AN-M3/I, 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/I part is unused and in its original packaging.
Return procedure for SMPC40AN-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMPC40AN-M3/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
