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Vishay General Semiconductor - Diodes Division SMC5K45A-M3/H
- Part No.:
- SMC5K45A-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K45A-M3/H.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,018
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Product details
Overview
SMC5K45A-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), 72.7 V maximum clamping voltage at 68.8 A, and 45 V stand-off voltage. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMC5K45A-M3/H datasheet, SMC5K45A-M3/H pinout, SMC5K45A-M3/H application, or SMC5K45A-M3/H equivalent, key selection criteria include clamping voltage at rated surge current, unidirectional polarity, AEC-Q101 qualification status, thermal resistance (RthJA = 90 °C/W), and compliance with IEC 61000-4-2 (30 kV contact/air discharge).
Technical Context
This TVS diode operates as a voltage-clamping device triggered by transient overvoltage events. Its breakdown voltage range is 50.0–55.3 V at 1 mA test current, with 1.0 μA max reverse leakage at 45 V stand-off voltage and 150 °C maximum junction temperature rating.
The device uses an avalanche breakdown mechanism to divert surge energy away from protected circuitry. It 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 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working limit. |
| VBR min/max | 50.0 V / 55.3 V - Breakdown voltage range at 1 mA; ensures reliable turn-on within defined tolerance band. |
| VC @ IPPM | 72.7 V - Clamping voltage at 68.8 A peak pulse current (10/1000 μs); determines worst-case voltage seen by protected IC. |
| PPPM | 5000 W - Peak pulse power handling (10/1000 μs); enables robust protection against lightning-induced surges and inductive switching transients. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and high-ambient industrial environments. |
| RthJA | 90 °C/W - Junction-to-ambient thermal resistance on FR4 PCB; informs heatsinking requirements for repeated surge duty cycles. |
| ESD Rating | 30 kV - Human body model (HBM) contact and air discharge per IEC 61000-4-2; qualifies for ESD-sensitive system 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 × 2.62 mm (L × W × H). Mounting pad layout specified per Vishay outline drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction; connected to ground or low-side reference in unidirectional configuration. | Provides return path for surge current; must be routed with low-inductance trace to minimize clamping overshoot. |
| Cathode | Current exit during reverse-biased clamping; connected to protected line (e.g., power rail or signal input). | Acts as the protected node interface; polarity marking ensures correct orientation during placement and inspection. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping architecture | Enables precise protection of positive-rail circuits without interfering with normal DC bias or signal integrity. |
| 5000 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 4 (4 kV line-to-line, 2 kV line-to-ground) surge immunity in industrial power supplies. |
| AEC-Q101 qualified variant available (HM3 suffix) | Validates reliability for automotive applications including engine control units and ADAS sensor interfaces. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), critical for protecting modern low-voltage ICs. |
| MSL Level 1, 260 °C peak reflow | Permits single-pass lead-free assembly without moisture-related delamination or popcorn failure. |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed microcontroller power rails from load-dump transients up to 35 V and ISO 7637-2 pulse 5a. IC Role / Device Role / Timing Role: Voltage-clamping transient suppressor placed between VIN and GND, responding within <1 ns to clamp spikes above 45 V. Use Value: Limits rail voltage to ≤72.7 V during 68.8 A surges, preventing latch-up or gate oxide damage in downstream 5 V/3.3 V logic. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced surges and ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS connected across input terminal and common, absorbing repetitive 1 kV/40 Ω transients per IEC 61000-4-4. Use Value: Maintains signal integrity below 45 V standby while clamping to 72.7 V during 10/1000 μs surges, enabling reliable optocoupler triggering. |
| Telecom DC Power Interface | Motor Drive Gate Driver Protection |
|
Use Scenario: Safeguarding PoE-powered Ethernet switch DC-DC converter inputs against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of filtering and regulation, rated for 5000 W peak power. Use Value: Absorbs up to 5000 W for 1 ms without degradation, reducing need for secondary MOV-based protection and minimizing board space. |
Use Scenario: Protecting high-side and low-side gate drivers in BLDC motor inverters from shoot-through-inducing voltage spikes during IGBT/MOSFET switching. IC Role / Device Role / Timing Role: Local clamping device mounted adjacent to gate driver IC output pins, limiting gate-source voltage excursions. Use Value: Clamps gate drive transients to ≤72.7 V at 68.8 A, preventing false turn-on and ensuring robust commutation in 48 V e-bike and HVAC systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ45A-E3/5A | Lower peak pulse power (400 W), SMA package (smaller footprint, higher RthJA = 150 °C/W), same VWM = 45 V. | Suitable only for low-energy transients (IEC 61000-4-2 ESD, not lightning-level surges). | Select when board space is constrained and surge threat level is limited to ESD or low-energy switching noise. |
| SMCJ45A | Same SMC package and VWM, but higher PPPM = 1500 W (not 5000 W); no AEC-Q101 option; different clamping curve (VC = 70.1 V @ 43.3 A). | Meets industrial-grade surge requirements (IEC 61000-4-5 Level 3), but insufficient for automotive load-dump or high-reliability industrial mains interfaces. | Choose for cost-sensitive industrial designs where 5000 W capability is unnecessary and AEC-Q101 is not required. |
Compared with SMAJ45A-E3/5A and SMCJ45A, the SMC5K45A-M3/H delivers 3.3× higher surge energy absorption than SMCJ45A and 12.5× more than SMAJ45A, making it uniquely suited for AEC-Q101-compliant automotive power domains and high-power industrial AC/DC front-ends requiring full IEC 61000-4-5 Level 4 compliance.
Availability
SMC5K45A-M3/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom power interfaces, and motor drive gate protection requiring stable component supply and long-term lifecycle support.
Supply support for SMC5K45A-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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMC5K45A-M3/H belongs to Vishay's TRANSZORB® family of high-power TVS diodes, engineered specifically for demanding surge immunity in automotive, industrial, and telecom infrastructure where sustained 5000 W pulse handling and AEC-Q101 validation are mandatory.
FAQ
What is the breakdown voltage range of the SMC5K45A-M3/H?
The SMC5K45A-M3/H has a guaranteed breakdown voltage range of 50.0 V to 55.3 V at 1 mA test current, measured per ANSI/IEEE C62.35 standards. This tight VBR window ensures consistent clamping onset across production lots and supports predictable overvoltage protection design margins in the SMC5K45A-M3/H application.
Is the SMC5K45A-M3/H AEC-Q101 qualified?
No - the base SMC5K45A-M3/H is not AEC-Q101 qualified. Only variants with the HM3 suffix (e.g., SMC5K45AHM3_A/H) carry AEC-Q101 qualification, and those are restricted to SMC5K10A–SMC5K20A per Vishay documentation. The SMC5K45A-M3/H is rated for industrial-grade operation with full IEC 61000-4-2 ESD and IEC 61000-4-5 surge compliance.
What is the maximum clamping voltage of the SMC5K45A-M3/H at its rated surge current?
The SMC5K45A-M3/H clamps to a maximum of 72.7 V at 68.8 A peak pulse current under the standard 10/1000 μs waveform. This value is measured per Figure 3 in the datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events, directly impacting IC survivability in the SMC5K45A-M3/H application.
What package type does the SMC5K45A-M3/H use, and what are its key mechanical features?
The SMC5K45A-M3/H uses the SMC (DO-214AB) surface-mount package: 7.11 mm × 6.22 mm × 2.62 mm, with matte tin-plated leads, UL 94 V-0 molding compound, and MSL Level 1 rating for 260 °C lead-free reflow. The cathode is marked by a color band, and the device meets JESD 201 Class 2 whisker resistance requirements.
How does the SMC5K45A-M3/H compare to lower-power TVS diodes like SMAJ45A in surge handling capability?
The SMC5K45A-M3/H delivers 5000 W peak pulse power (10/1000 μs), versus 400 W for SMAJ45A - a 12.5× difference. This enables the SMC5K45A-M3/H to absorb lightning-level surges (IEC 61000-4-5 Level 4) that would destroy SMAJ45A. Its larger SMC package also provides lower thermal resistance (90 °C/W vs. ~150 °C/W), sustaining repeated high-energy events without degradation.
SMC5K45A-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):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 68.8A
- 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)
SMC5K45A-M3/H FAQ
1.How can I place an order for SMC5K45A-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K45A-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 SMC5K45A-M3/H reliable?
The price and inventory of SMC5K45A-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 SMC5K45A-M3/H is usually 5 days.
3.What payment methods are accepted for SMC5K45A-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K45A-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K45A-M3/H?
SMC5K45A-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K45A-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 SMC5K45A-M3/H?
For technical support, including SMC5K45A-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K45A-M3/H requirements.
6.How does Aetrix verify that SMC5K45A-M3/H is sourced from the original manufacturer or authorized distributors?
All SMC5K45A-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 SMC5K45A-M3/H meets industry standards.
7.What is the process for return or replacement of SMC5K45A-M3/H?
All SMC5K45A-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K45A-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 SMC5K45A-M3/H part is unused and in its original packaging.
Return procedure for SMC5K45A-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K45A-M3/H Tags
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