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Vishay General Semiconductor - Diodes Division SMC5K40A-M3/H
- Part No.:
- SMC5K40A-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K40A-M3/H.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:323
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Product details
Overview
SMC5K40A-M3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 5000 W peak pulse power (10/1000 μs), 40 V stand-off voltage (VWM), and 64.5 V maximum clamping voltage (VC) at 77.5 A IPPM. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMC5K40A-M3/H datasheet, SMC5K40A-M3/H pinout, SMC5K40A-M3/H application, or SMC5K40A-M3/H equivalent, key selection criteria include clamping performance under 10/1000 μs transients, AEC-Q101 qualification status, thermal resistance (RthJA = 90 °C/W), and compliance with IEC 61000-4-2 ESD (30 kV contact/air).
Technical Context
This TVS diode operates unidirectionally with a breakdown voltage range of 44.4–49.1 V at 1 mA test current, enabling precise overvoltage thresholding in DC power rails and signal paths. Its low incremental surge resistance and fast response time ensure effective suppression of inductive switching spikes and lightning-induced surges.
The device meets MSL level 1 per J-STD-020, supports 260 °C lead-free reflow, and features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Thermal characteristics include RthJM = 4.0 °C/W, supporting robust junction-to-mount heat dissipation in high-power transient events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 48 V systems. |
| VBR min/max | 44.4 V / 49.1 V - Breakdown occurs within this range at 1 mA; ensures reliable turn-on without premature conduction. |
| VC @ IPPM | 64.5 V at 77.5 A (10/1000 μs) - Clamping voltage limits downstream component stress during standardized surge events. |
| PPPM | 5000 W - Peak pulse power handling capacity for 10/1000 μs waveform; enables protection against high-energy transients. |
| TJ max | +150 °C - Maximum junction temperature rating; supports operation in under-hood automotive and industrial environments. |
| ESD immunity | 30 kV per IEC 61000-4-2 (contact/air) - Provides robust electrostatic discharge protection for exposed interfaces. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, with cathode indicated by color band. Dimensions: 7.11 mm × 6.22 mm × 2.90 mm (L × W × H). Mounting pad layout defined per JEDEC MS-013.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during clamping | Connected to protected circuit ground or low-side return path; forms forward-biased path during overvoltage event. |
| Cathode | Current exit terminal during clamping | Connected to protected line (e.g., 48 V rail or signal); polarity marking ensures correct orientation on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Peak pulse power | 5000 W (10/1000 μs) - Enables single-device protection against ISO 7637-2 Pulse 1/2b and IEC 61000-4-5 Level 4 surges. |
| AEC-Q101 qualified | Qualified for automotive applications (per note: SMC5K10A–SMC5K20A only; SMC5K40A is industrial grade) - Confirms reliability for non-safety-critical vehicle subsystems. |
| Low clamping ratio | VC/VWM = 1.61 - Minimizes overvoltage overshoot relative to working voltage, reducing stress on downstream silicon. |
| MSL Level 1 | Moisture sensitivity level 1 per J-STD-020 - Allows unlimited floor life and standard reflow without baking. |
| UL 497B recognized | File E136766 - Validates safety compliance for telecom and industrial interface protection circuits. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs from load dump and inductive switching transients in chassis modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed across power input pins to clamp surges before they reach DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤64.5 V, preventing latch-up or gate oxide damage in 40 V-rated power management ICs. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of pressure sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between signal and ground to suppress EFT bursts without distorting slow-varying analog signals. Use Value: With <100 pF junction capacitance at zero bias, preserves signal integrity up to 1 MHz bandwidth while absorbing 4 kV EFT pulses. |
| Telecom DC Power Feeds | Computer Peripheral Port Protection |
Use Scenario: Safeguarding PoE-powered devices (e.g., IP cameras) against lightning-induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of DC-DC regulation, sized for 5000 W peak pulse energy. Use Value: Handles 8/20 μs surges up to 476 A (VC = 84.0 V), meeting IEC 61000-4-5 Level 3 requirements for outdoor equipment. |
Use Scenario: Protecting USB-C power delivery (PD) controller VBUS lines from hot-plug transients and cable ESD events. IC Role / Device Role / Timing Role: Fast-response unidirectional TVS placed directly at connector to shunt ESD before reaching PD controller's internal FETs. Use Value: 30 kV IEC 61000-4-2 contact discharge rating prevents gate oxide failure in 30 V-rated USB PD switches. |
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 | Lower PPPM (400 W), SMA package (smaller footprint), higher RthJA (150 °C/W) | Not suitable for 5000 W surge events; limited to low-energy ESD/EFT in space-constrained consumer ports | Select SMC5K40A-M3/H when system-level surge testing requires ≥5000 W capability and thermal robustness. |
| 1.5KE40A | Through-hole DO-201 package, same VWM/VC specs, but lower surge repetition tolerance and no MSL 1 rating | Requires wave soldering; unsuitable for automated SMT production or high-reliability automotive reflow profiles | Choose SMC5K40A-M3/H for fully SMT-compatible, high-volume industrial assembly with lead-free reflow support. |
Compared with SMAJ40A-E3/5A and 1.5KE40A, the SMC5K40A-M3/H delivers 12.5× higher peak pulse power in an SMT-optimized package with verified MSL 1 and UL 497B compliance-making it the preferred choice for ruggedized 48 V system protection where board space, thermal performance, and process compatibility are critical.
Availability
SMC5K40A-M3/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor signal protection, telecom DC power feeds, and computer peripheral port protection requiring stable component supply and long-term manufacturing continuity.
Supply support for SMC5K40A-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 performance.
The SMC5K40A-M3/H belongs to Vishay's TRANSZORB® family of high-power TVS diodes, engineered for industrial and automotive-grade transient suppression where clamping precision, surge endurance, and process compatibility are essential.
FAQ
What is the clamping voltage of the SMC5K40A-M3/H under a 10/1000 μs surge?
The SMC5K40A-M3/H has a maximum clamping voltage (VC) of 64.5 V at 77.5 A peak pulse current (IPPM) for a 10/1000 μs waveform. This value is measured per Figure 3 in the Vishay datasheet 87742 and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The SMC5K40A-M3/H maintains this clamping performance across its specified operating temperature range.
Is the SMC5K40A-M3/H AEC-Q101 qualified?
No, the SMC5K40A-M3/H is not AEC-Q101 qualified. Per the Vishay datasheet revision 09-Jan-2024, AEC-Q101 qualification applies only to SMC5K10A through SMC5K20A variants (with HM3 suffix). The SMC5K40A-M3/H is rated for industrial-grade applications and carries the M3 halogen-free, RoHS-compliant designation without automotive qualification.
What does the "-M3/H" suffix indicate in SMC5K40A-M3/H?
The "-M3" suffix denotes halogen-free, RoHS-compliant construction with JESD 201 Class 2 whisker resistance; "/H" specifies packaging in 7-inch plastic tape and reel with 850 units per reel. This ordering code aligns with Vishay's preferred package format for automated SMT placement and confirms compliance with environmental and process standards required for modern electronics manufacturing. The SMC5K40A-M3/H uses this exact configuration.
Can the SMC5K40A-M3/H be used in bidirectional configurations?
No, the SMC5K40A-M3/H is a unidirectional TVS diode, as explicitly stated in the datasheet features and electrical characteristics table. It conducts only when the cathode is positive relative to the anode. For bidirectional protection, two SMC5K40A-M3/H devices must be connected in series opposing configuration-or a dedicated bidirectional part such as SMC5K40CA should be selected instead.
What is the thermal resistance junction-to-ambient (RthJA) for the SMC5K40A-M3/H?
The thermal resistance junction-to-ambient (RthJA) for the SMC5K40A-M3/H is 90 °C/W, measured per JEDEC 51-2A on FR4 PCB with 2 oz. copper and standard SMC footprint. This value reflects steady-state conduction limitations and informs derating calculations above 25 °C ambient. The SMC5K40A-M3/H also achieves RthJM = 4.0 °C/W, indicating efficient heat transfer to the mounting pad.
SMC5K40A-M3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- 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):
- 77.5A
- Power - Peak Pulse:
- 5000W (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:
- DO-214AB (SMC)
SMC5K40A-M3/H FAQ
1.How can I place an order for SMC5K40A-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K40A-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 SMC5K40A-M3/H reliable?
The price and inventory of SMC5K40A-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 SMC5K40A-M3/H is usually 5 days.
3.What payment methods are accepted for SMC5K40A-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K40A-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K40A-M3/H?
SMC5K40A-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K40A-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 SMC5K40A-M3/H?
For technical support, including SMC5K40A-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K40A-M3/H requirements.
6.How does Aetrix verify that SMC5K40A-M3/H is sourced from the original manufacturer or authorized distributors?
All SMC5K40A-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 SMC5K40A-M3/H meets industry standards.
7.What is the process for return or replacement of SMC5K40A-M3/H?
All SMC5K40A-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K40A-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 SMC5K40A-M3/H part is unused and in its original packaging.
Return procedure for SMC5K40A-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K40A-M3/H Tags
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