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Vishay General Semiconductor - Diodes Division SMC5K40CA-M3/H
- Part No.:
- SMC5K40CA-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K40CA-M3/H.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMC5K40CA-M3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, designed for high-energy surge protection with 5000 W peak pulse power (10/1000 μs), 40 V standoff voltage (VWM), and 64.5 V 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 SMC5K40CA-M3/H datasheet, SMC5K40CA-M3/H pinout, SMC5K40CA-M3/H application, or SMC5K40CA-M3/H equivalent, this page delivers verified electrical ratings, AEC-Q101 qualification status, thermal resistance values, junction capacitance behavior, and real-world clamping performance under 10/1000 μs and 8/20 μs transients.
Technical Context
This TVS diode operates bidirectionally with breakdown voltage (VBR) ranging from 44.4 V to 49.1 V at 1 mA test current, ensuring reliable turn-on before system damage occurs. Its low incremental surge resistance enables stable clamping across wide current ranges, while meeting IEC 61000-4-2 ESD immunity up to 30 kV (contact/air).
Thermal design is supported by RthJA = 90 °C/W and RthJM = 4.0 °C/W, enabling robust operation up to TJ = +175 °C. The device is halogen-free, RoHS-compliant, MSL Level 1 rated, and qualified to AEC-Q101 for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe signal line bias margin. |
| VBR min/max | 44.4 V / 49.1 V - Breakdown occurs within this range at 1 mA; ensures predictable turn-on threshold across temperature and lot variation. |
| VC @ IPPM (10/1000 μs) | 64.5 V - Clamped voltage seen by protected circuit at 77.5 A peak pulse; determines maximum stress on downstream components. |
| PPPM (10/1000 μs) | 5000 W - Peak transient energy absorption capability; supports high-energy inductive switching and lightning-induced surges. |
| TJ max | +175 °C - Maximum junction temperature rating; enables use in under-hood automotive environments without derating. |
| ESD Rating | 30 kV HBM (contact/air) - Complies with IEC 61000-4-2; provides robust static discharge protection for exposed interfaces. |
| RthJA | 90 °C/W - Junction-to-ambient thermal resistance on standard FR4 PCB; informs heatsinking requirements for sustained surge duty. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no cathode band. Matte tin-plated leads, J-STD-002 solderable, JESD 201 Class 2 whisker tested.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during negative transient | Connects to protected line; conducts when voltage falls below -VBR, clamping negative excursions. |
| Cathode | Current entry during positive transient | Connects to protected line; conducts when voltage exceeds +VBR, clamping positive excursions. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects AC-coupled or floating signal paths without polarity constraints; eliminates need for dual-device configurations. |
| 40 kW surge rating (8/20 μs) | Supports telecom-grade lightning surge standards (IEC 61000-4-5); withstands high-current fast-rising transients. |
| AEC-Q101 qualification | Validated for automotive powertrain and chassis systems; includes temperature cycling, humidity bias, and mechanical shock testing. |
| MSL Level 1, 260 °C reflow | Enables single-pass lead-free assembly without moisture sensitivity concerns; no baking required prior to SMT placement. |
| UL 497B recognition (E136766) | Meets safety agency requirements for telecom and industrial interface protection; simplifies end-equipment certification. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protection of 12 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converters and microcontroller power rails. Use Value: Limits transient voltage to ≤64.5 V at 77.5 A, preventing latch-up or gate oxide rupture in downstream MOSFETs and LDOs. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors from EMI and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (typ. 120 pF at 0 V) shunt protector on 0–5 V or 4–20 mA output lines. Use Value: Maintains signal integrity with <1.0 μA leakage at 40 V, while clamping ESD pulses within nanoseconds. |
| Telecom Line Interface | Motor Drive Gate Driver Protection |
Use Scenario: Surge suppression on RS-485/RS-232 data lines exposed to field wiring in building automation. IC Role / Device Role / Timing Role: Bidirectional transient suppressor bridging differential pair to ground, compliant with IEC 61000-4-5 Level 4. Use Value: Absorbs 40 kW (8/20 μs) surges without degradation, preserving communication link reliability over 100,000+ surge events. |
Use Scenario: Guarding high-side/low-side gate drivers in BLDC inverters from shoot-through-inducing voltage spikes. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) clamp across gate-source terminals of Si MOSFETs or GaN HEMTs. Use Value: Prevents false turn-on by limiting dv/dt-induced gate voltage overshoot to <64.5 V during inductive switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40CA-M3/87A | Lower PPPM (600 W vs. 5000 W); SMB package (smaller footprint, higher RthJA = 110 °C/W) | Suitable for lower-energy ESD-only scenarios; not rated for load dump or lightning surges. | Select when space-constrained and surge energy is limited to <100 mJ; verify thermal margin at 125 °C ambient. |
| SMCJ40CA-E3/57T | Same SMC package and 5000 W rating, but non-AEC-Q101, RoHS-compliant only (no automotive qualification) | Acceptable for industrial/commercial designs where automotive reliability validation is not required. | Choose for cost-sensitive non-automotive programs; confirm end-equipment safety certification path excludes AEC-Q101 dependency. |
Compared with SMBJ40CA-M3/87A and SMCJ40CA-E3/57T, the SMC5K40CA-M3/H uniquely combines AEC-Q101 qualification, 5000 W surge capacity, and SMC package thermal performance-making it the only option validated for automotive power distribution nodes requiring both high energy handling and long-term reliability under thermal cycling.
Availability
SMC5K40CA-M3/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom line protection, and motor drive gate driver circuits requiring stable component supply across extended production lifecycles.
Supply support for SMC5K40CA-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, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The SMC5KxxCA series was engineered specifically for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom infrastructure where failure modes must be mitigated across wide temperature and surge profiles.
FAQ
What is the clamping voltage of the SMC5K40CA-M3/H at its rated peak pulse current?
The SMC5K40CA-M3/H exhibits a maximum clamping voltage (VC) of 64.5 V at its specified peak pulse current (IPPM) of 77.5 A under the 10/1000 μs waveform. This value is measured per Fig.3 in the official Vishay datasheet (Doc. #87024, Rev. 10-Sep-2024) and represents the upper limit of voltage imposed on protected circuitry during worst-case surge conditions. The SMC5K40CA-M3/H maintains this clamping performance across its full operating temperature range.
Is the SMC5K40CA-M3/H qualified for automotive applications?
Yes, the SMC5K40CA-M3/H is explicitly AEC-Q101 qualified, as confirmed in the Vishay datasheet (Section "Ratings and Characteristics Curves", Note (1)). This qualification covers stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing-validating its suitability for under-hood and chassis-mounted automotive electronics. The SMC5K40CA-M3/H carries the HM3 suffix variant for full AEC-Q101 compliance; the M3/H version shares identical die and qualification scope per Vishay's ordering matrix.
What is the junction-to-ambient thermal resistance (RthJA) of the SMC5K40CA-M3/H?
The SMC5K40CA-M3/H has a typical junction-to-ambient thermal resistance (RthJA) of 90 °C/W when mounted on a standard FR4 PCB with 2 oz. copper, per JEDEC 51-2A. This value is critical for calculating steady-state temperature rise during repetitive surge events or elevated ambient conditions. The SMC5K40CA-M3/H also specifies RthJM = 4.0 °C/W (junction-to-mount), supporting thermal modeling for custom heatsink integration in high-reliability power modules.
Does the SMC5K40CA-M3/H have polarity markings on the package?
No, the SMC5K40CA-M3/H does not feature a cathode band or other polarity marking because it is a bidirectional TVS diode. Its symmetrical construction allows installation in either orientation across a protected line and ground-simplifying layout and eliminating orientation-related assembly errors. This characteristic is explicitly noted in the "Mechanical Data" section of the Vishay datasheet (Doc. #87024) under "Polarity: no cathode band for bidirectional types." The SMC5K40CA-M3/H relies on internal back-to-back Zener structure rather than unidirectional PN junction topology.
What is the maximum peak pulse power rating for the SMC5K40CA-M3/H under an 8/20 μs waveform?
The SMC5K40CA-M3/H is rated for 40 kW peak pulse power under the 8/20 μs waveform, as stated in the "Features" section and confirmed in the "Maximum Ratings" table of the Vishay datasheet (Doc. #87024). This rating reflects its capability to absorb high-amplitude, fast-rising transients common in telecom lightning protection (IEC 61000-4-5) and industrial switching noise. The SMC5K40CA-M3/H achieves this via low dynamic impedance and optimized silicon geometry, delivering VC = 84.0 V at IPPM = 476 A for the 8/20 μs condition.
SMC5K40CA-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:
- -
- Bidirectional Channels:
- 1
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMC5K40CA-M3/H FAQ
1.How can I place an order for SMC5K40CA-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K40CA-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 SMC5K40CA-M3/H reliable?
The price and inventory of SMC5K40CA-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 SMC5K40CA-M3/H is usually 5 days.
3.What payment methods are accepted for SMC5K40CA-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K40CA-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K40CA-M3/H?
SMC5K40CA-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K40CA-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 SMC5K40CA-M3/H?
For technical support, including SMC5K40CA-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K40CA-M3/H requirements.
6.How does Aetrix verify that SMC5K40CA-M3/H is sourced from the original manufacturer or authorized distributors?
All SMC5K40CA-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 SMC5K40CA-M3/H meets industry standards.
7.What is the process for return or replacement of SMC5K40CA-M3/H?
All SMC5K40CA-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K40CA-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 SMC5K40CA-M3/H part is unused and in its original packaging.
Return procedure for SMC5K40CA-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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