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Vishay General Semiconductor - Diodes Division SMPC40ANHM3/H
- Part No.:
- SMPC40ANHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC40ANHM3/H.pdf
- Description:
- TVS DIODE 40VWM 64.5VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:4,179
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Product details
Overview
SMPC40ANHM3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the TRANSZORB® family, designed for robust overvoltage protection of sensitive electronics. 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 - deployed on power rails and signal lines in automotive sensor modules and industrial control interfaces.
For engineers reviewing the SMPC40ANHM3/H datasheet, SMPC40ANHM3/H pinout, SMPC40ANHM3/H application, or SMPC40ANHM3/H equivalent, key selection criteria include its AEC-Q101 qualification, TO-277A (SMPC) package with cathode-band polarity marking, low-profile 1.1 mm height, and suitability for automated SMT placement in high-reliability automotive and industrial designs.
Technical Context
This device operates as a unidirectional avalanche diode, clamping transients via controlled reverse-biased breakdown when voltage exceeds VBR. Its low incremental surge resistance and fast response time ensure effective suppression of inductive switching spikes and ESD events without latch-up or thermal runaway.
Designed for surface-mount use on FR4 PCBs with 2 oz copper, it delivers 1.25 W steady-state power dissipation at 25 °C ambient and supports junction temperatures up to +150 °C. The SMPC (TO-277A) package enables efficient heat transfer with RθJM ≤ 3 °C/W when mounted to heatsink.
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 - precise breakdown threshold ensures reliable turn-on margin above VWM |
| VC @ IPPM | 64.5 V at 23.3 A - limits protected circuit voltage during 10/1000 μs surge |
| PPPM | 1500 W - handles high-energy transients common in automotive load-dump and inductive kick scenarios |
| TJ max | +150 °C - supports operation in under-hood automotive environments and industrial enclosures |
| Package | SMPC (TO-277A) - 3-terminal surface-mount package with cathode band marking and 1.1 mm profile |
| AEC-Q101 | Qualified - certified for automotive-grade reliability per stress test requirements |
Pinout & Package
SMPC40ANHM3/H uses the SMPC (TO-277A) package: a 3-terminal, low-profile surface-mount outline conforming to JEDEC TO-277A. Dimensions are 4.80 × 3.70 × 1.10 mm (L × W × H), with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity is marked by a cathode band on the case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Primary anode connection | Connected to protected line (e.g., power rail or signal trace) in unidirectional configuration |
| Anode 2 | Secondary anode connection | Electrically tied to Anode 1 internally; used for enhanced current sharing and thermal spreading |
| Cathode | Clamping output terminal | Connected to ground or low-impedance return path; carries full surge current during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (1.1 mm height) | Enables compact PCB layouts in space-constrained automotive ECUs and sensor housings |
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and body electronics |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for downstream ICs |
| Meets MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without moisture-related failure risk |
| Halogen-free, RoHS-compliant | Complies with environmental regulations for global automotive and industrial supply chains |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., temperature, pressure) in engine control units against load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor signal line and chassis ground to shunt surge energy before reaching precision front-end amplifiers or microcontrollers. Use Value: Clamps 1500 W transients to ≤64.5 V while maintaining 40 V operating margin - preventing latch-up or damage to 5 V or 3.3 V interface ICs. | Use Scenario: Safeguarding digital input/output terminals of programmable logic controllers exposed to inductive switching noise from solenoids, relays, and motor drives. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across each I/O channel to absorb repetitive 10/1000 μs surges induced by field-side switching. Use Value: Withstands ≥1000 surges at rated IPPM and maintains stable VWM over temperature - ensuring long-term reliability in factory automation environments. |
| Telecom Power Rail Protection | Consumer Power Adapter Surge Suppression |
Use Scenario: Guarding DC-DC converter outputs and PoE-powered Ethernet PHYs against lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 48 V or 24 V intermediate bus rails upstream of point-of-load regulators. Use Value: Delivers 1500 W PPPM with <1 ns response - limiting rail excursions below IC absolute maximum ratings during telecom-grade surge tests (IEC 61000-4-5). | Use Scenario: Integrated into AC-DC adapter secondary-side outputs to meet UL 1449 and IEC 61000-4-5 Class III immunity requirements. IC Role / Device Role / Timing Role: Final-stage transient suppressor on regulated 5 V/12 V outputs, positioned after filtering but before connector pins. Use Value: AEC-Q101 qualification and MSL Level 1 rating ensure compatibility with high-volume automated assembly and extended product lifetime in consumer power supplies. |
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-M3/86A | Same VWM (40 V) and PPPM (400 W), but lower 400 W rating and SMA package (higher RθJA) | Limited to lower-energy transients; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and higher surge capability |
| SMCJ40A-H | Same VWM and 1500 W PPPM, but SMC package (2.5 mm height) and non-AEC-Q101 industrial grade | Higher profile limits use in ultra-thin modules; lacks automotive stress validation | Choose for industrial-only designs where board height is less constrained and AEC-Q101 is not required |
Compared with SMAJ40A-M3/86A and SMCJ40A-H, SMPC40ANHM3/H provides superior surge handling in a lower-profile, automotive-qualified package - making it optimal for next-generation compact, mission-critical automotive electronics where both space and reliability are non-negotiable.
Availability
SMPC40ANHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O protection, and telecom power rail stabilization requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for SMPC40ANHM3/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 was developed specifically for high-surge, low-profile automotive and industrial transient suppression - combining AEC-Q101 qualification, TO-277A thermal performance, and TRANSZORB® clamping precision in a single platform.
FAQ
What is the clamping voltage of SMPC40ANHM3/H at its rated peak pulse current?
The SMPC40ANHM3/H has a maximum clamping voltage (VC) of 64.5 V at its rated peak pulse current (IPPM) of 23.3 A under 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 circuits during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is SMPC40ANHM3/H qualified for automotive applications?
Yes, SMPC40ANHM3/H is AEC-Q101 qualified, as confirmed in the Vishay datasheet (document 89116, Revision 17-Sep-2021). The "HM3" suffix explicitly denotes AEC-Q101 qualification, and this part falls within the SMPC22AN–SMPC85AN range specified for automotive use - validating its reliability for engine control, ADAS, and body electronics applications.
What does the "H" in SMPC40ANHM3/H indicate in the ordering code?
The "H" in SMPC40ANHM3/H is the preferred package code denoting a 7-inch diameter plastic tape-and-reel delivery format with a base quantity of 1500 units. Per Vishay's ordering information table (page 3 of document 89116), this code applies to all SMPCxxAN-M3/H and SMPCxxANHM3/H variants and specifies reel size and packaging - not electrical or mechanical differentiation.
How does the SMPC (TO-277A) package improve thermal performance compared to SMA or SMC packages?
The SMPC (TO-277A) package achieves RθJM ≤ 3 °C/W due to its dual-anode construction and optimized thermal path to the PCB pad, outperforming SMA (RθJA ~150 °C/W) and matching SMC in surge handling while reducing height by >50%. This allows SMPC40ANHM3/H to sustain repeated 1500 W surges with lower junction temperature rise - essential for automotive under-hood reliability.
Can SMPC40ANHM3/H be used in bidirectional configurations?
No, SMPC40ANHM3/H is strictly unidirectional, as stated in the "Polarity" section of the datasheet and confirmed by its single cathode band marking and asymmetric IV curve. Bidirectional protection requires two devices in series opposition or a dedicated bidirectional TVS like SMBJ40CA; using SMPC40ANHM3/H in reverse bias beyond VWM risks permanent degradation.
SMPC40ANHM3/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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-277A (SMPC)
SMPC40ANHM3/H FAQ
1.How can I place an order for SMPC40ANHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC40ANHM3/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 SMPC40ANHM3/H reliable?
The price and inventory of SMPC40ANHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC40ANHM3/H is usually 5 days.
3.What payment methods are accepted for SMPC40ANHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC40ANHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC40ANHM3/H?
SMPC40ANHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC40ANHM3/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 SMPC40ANHM3/H?
For technical support, including SMPC40ANHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC40ANHM3/H requirements.
6.How does Aetrix verify that SMPC40ANHM3/H is sourced from the original manufacturer or authorized distributors?
All SMPC40ANHM3/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 SMPC40ANHM3/H meets industry standards.
7.What is the process for return or replacement of SMPC40ANHM3/H?
All SMPC40ANHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMPC40ANHM3/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 SMPC40ANHM3/H part is unused and in its original packaging.
Return procedure for SMPC40ANHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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