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Vishay General Semiconductor - Diodes Division SMPC40ANHM3/I
- Part No.:
- SMPC40ANHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC40ANHM3/I.pdf
- Description:
- TVS DIODE 40VWM 64.5VC TO277A
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMPC40ANHM3/I 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). It is AEC-Q101 qualified and designed for automotive-grade overvoltage protection of MOSFETs, sensor signal lines, and IC power rails.
For engineers reviewing the SMPC40ANHM3/I datasheet, SMPC40ANHM3/I pinout, SMPC40ANHM3/I application, or SMPC40ANHM3/I equivalent, this device is selected for high-energy transient suppression in space-constrained automotive and industrial PCBs where low-profile mounting (1.1 mm height), MSL Level 1 reflow compatibility, and robust clamping performance are critical.
Technical Context
This unidirectional TVS diode operates with a breakdown voltage (VBR) range of 44.4–49.1 V at 1 mA test current and exhibits very fast response time to transients, enabling effective protection against inductive switching spikes and ESD events. Its low incremental surge resistance and stable clamping behavior under 10/1000 μs waveform conditions ensure predictable energy diversion away from sensitive downstream components.
The SMPC40ANHM3/I uses a dual-anode/single-cathode configuration in the SMPC (TO-277A) package, with cathode denoted by a band. Thermal resistance junction-to-mount (RθJM) is 2.5–3.0 °C/W, supporting efficient heat transfer when mounted on heatsink-equipped PCBs - a key design consideration for sustained surge handling in automotive power electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC bias margin for protected circuitry. |
| VBR min/max | 44.4 V / 49.1 V at 1 mA - Confirmed breakdown threshold window; ensures reliable turn-on without premature conduction. |
| VC @ IPPM | 64.5 V at 23.3 A - Clamped voltage during 10/1000 μs surge; determines maximum stress imposed on downstream components. |
| PPPM | 1500 W - Peak pulse power rating; quantifies single-event surge energy absorption capability under standardized waveform. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments with thermal derating. |
| Package | SMPC (TO-277A) - Surface-mount, low-profile (1.1 mm typical height), AEC-Q101 qualified package with matte tin leads. |
| Polarity | Unidirectional - Single-direction conduction; used for DC rail protection where reverse-bias blocking is required. |
Pinout & Package
SMPC40ANHM3/I is housed in the SMPC (TO-277A) package - a 3-terminal surface-mount case conforming to JEDEC TO-277A outline, with 1.1 mm typical height, UL 94 V-0 molding compound, and matte tin-plated leads solderable per J-STD-002. The cathode is marked by a band; terminals are arranged as two anodes and one shared cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Primary anode connection | One of two parallel anode paths; enables low-inductance, high-current surge path to cathode during clamping. |
| Anode 2 | Secondary anode connection | Dual-anode structure reduces incremental surge resistance and improves current sharing during high-energy transients. |
| Cathode (banded end) | Common cathode terminal | Single cathode node tied to system ground or reference; polarity marking ensures correct PCB orientation during placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| Low profile (1.1 mm height) | Enables use in ultra-thin modules and dense PCB layouts where Z-height is constrained, such as infotainment head units. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without moisture sensitivity concerns - eliminates pre-bake requirement in SMT line. |
| Halogen-free & RoHS-compliant | Meets global environmental compliance mandates for automotive OEMs and industrial equipment manufacturers. |
| Very fast response time | Sub-nanosecond turn-on ensures clamping occurs before transient energy damages sensitive gate oxides or analog front-ends. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in vehicle door modules against load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VCC and GND, clamping surges within 10/1000 μs waveform envelope. Use Value: Limits voltage seen by MCU to ≤64.5 V during 1500 W surge events, preventing latch-up or permanent damage. |
Use Scenario: Shielding analog output lines of pressure sensors in factory automation PLC I/O modules from EFT and inductive kickback. IC Role / Device Role / Timing Role: TVS connected across differential signal pair (e.g., 4–20 mA loop) to shunt transient energy to ground. Use Value: Maintains signal integrity by clamping transients below 64.5 V while adding <1 pF junction capacitance at zero bias. |
| Motor Drive Gate Protection | Telecom DC Power Interface |
|
Use Scenario: Safeguarding high-side N-channel MOSFET gates in automotive window lift drivers subjected to back-EMF from brushed DC motors. IC Role / Device Role / Timing Role: TVS placed between gate and source, absorbing negative-going spikes induced by rapid current interruption. Use Value: Prevents gate oxide rupture by limiting gate-source voltage to ≤64.5 V during 23.3 A transient events. |
Use Scenario: Protecting -48 V telecom power supply inputs in remote radio units from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Unidirectional TVS installed on input rail to clamp positive transients relative to system ground. Use Value: Withstands 1500 W pulses while maintaining 40 V standoff - compatible with legacy -48 V telecom architecture. |
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 | DO-214AC package; 64.5 V VC at 23.3 A; same VWM and PPPM but higher RθJA (100 °C/W vs. 3 °C/W). | Limited to lower-duty-cycle surges due to inferior thermal coupling; not AEC-Q101 qualified. | Choose SMAJ40A-E3/5A only for cost-sensitive non-automotive designs where board-level heatsinking is impractical. |
| SMCJ40A-QH | SMC (DO-214AB) package; identical electrical specs but 2.4 mm height and no AEC-Q101 certification in QH suffix. | Higher profile limits use in thin automotive modules; lacks automotive qualification documentation traceability. | Select SMCJ40A-QH only if existing footprint allows larger case and AEC-Q101 compliance is not contractually required. |
Compared with SMAJ40A-E3/5A and SMCJ40A-QH, SMPC40ANHM3/I delivers superior thermal performance (RθJM = 2.5 °C/W), automotive qualification, and 1.1 mm Z-height - making it the preferred choice for space- and reliability-critical automotive power electronics.
Availability
SMPC40ANHM3/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and motor drive gate safeguarding requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMPC40ANHM3/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, TVS devices, and optoelectronics with emphasis on reliability, automotive qualification, and high-power handling.
The SMPC series was developed specifically for AEC-Q101-compliant transient suppression in compact automotive ECUs and industrial control systems where low-profile mounting and robust surge immunity are mandatory.
FAQ
What is the clamping voltage of SMPC40ANHM3/I under a 10/1000 μs surge?
The SMPC40ANHM3/I has a maximum clamping voltage (VC) of 64.5 V at 23.3 A peak pulse current under the standardized 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. Designers must verify that downstream components tolerate this clamped level.
Is SMPC40ANHM3/I suitable for automotive applications?
Yes, SMPC40ANHM3/I is explicitly AEC-Q101 qualified per Vishay's ordering information and mechanical data section. The "HM3" suffix denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. It is intended for use in automotive subsystems including body control modules, lighting drivers, and sensor interfaces where qualification evidence is contractually required.
What does the "I" suffix mean in SMPC40ANHM3/I?
The "I" suffix in SMPC40ANHM3/I indicates packaging in 13-inch diameter plastic tape and reel, with a base quantity of 6500 units per reel. This differs from the "H" suffix (7-inch reel, 1500 units). Both share identical electrical, thermal, and qualification characteristics - only the delivery format differs.
How does the dual-anode configuration of SMPC40ANHM3/I improve performance?
The dual-anode layout in SMPC40ANHM3/I lowers incremental surge resistance and enhances current sharing during high-amplitude transients. This configuration reduces localized heating and improves clamping consistency compared to single-anode TVS devices of similar rating, directly supporting its 1500 W PPPM capability in the SMPC package.
Can SMPC40ANHM3/I be used in bidirectional configurations?
No, SMPC40ANHM3/I is strictly unidirectional, as confirmed in the PRIMARY CHARACTERISTICS table and FEATURES section. It conducts only when cathode is more positive than either anode. For bidirectional protection, Vishay offers separate part numbers such as SMPC40CA variants - SMPC40ANHM3/I must not be substituted without circuit redesign.
SMPC40ANHM3/I 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/I FAQ
1.How can I place an order for SMPC40ANHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC40ANHM3/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 SMPC40ANHM3/I reliable?
The price and inventory of SMPC40ANHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC40ANHM3/I is usually 5 days.
3.What payment methods are accepted for SMPC40ANHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC40ANHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC40ANHM3/I?
SMPC40ANHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC40ANHM3/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 SMPC40ANHM3/I?
For technical support, including SMPC40ANHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC40ANHM3/I requirements.
6.How does Aetrix verify that SMPC40ANHM3/I is sourced from the original manufacturer or authorized distributors?
All SMPC40ANHM3/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 SMPC40ANHM3/I meets industry standards.
7.What is the process for return or replacement of SMPC40ANHM3/I?
All SMPC40ANHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMPC40ANHM3/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 SMPC40ANHM3/I part is unused and in its original packaging.
Return procedure for SMPC40ANHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMPC40ANHM3/I Tags
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