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Vishay General Semiconductor - Diodes Division SMC5K45A-M3/I
- Part No.:
- SMC5K45A-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K45A-M3/I.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:604
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Product details
Overview
SMC5K45A-M3/I from Vishay General Semiconductor is a unidirectional surface-mount TRANSZORB® transient voltage suppressor (TVS) in SMC (DO-214AB) package, designed for robust overvoltage protection of power rails and signal lines. It features a 45 V stand-off voltage (VWM), 50–55.3 V breakdown range (VBR), 72.7 V clamping voltage at 68.8 A (10/1000 μs), 5000 W peak pulse power, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMC5K45A-M3/I datasheet, SMC5K45A-M3/I pinout, SMC5K45A-M3/I application, or SMC5K45A-M3/I equivalent, this device is selected for high-energy surge suppression in DC power inputs, MOSFET gate protection, sensor interface lines, and automotive body electronics where fast response (<1 ns), low clamping ratio, and MSL Level 1 reflow compatibility are critical.
Technical Context
The SMC5K45A-M3/I operates as a unidirectional avalanche diode with sharp reverse-breakdown characteristics, enabling sub-nanosecond response to transients induced by inductive switching or ESD events. Its junction-to-mount thermal resistance (RthJM = 4.0 °C/W) supports high-power pulse dissipation when mounted on thermally enhanced PCB copper areas.
It complies with IEC 61000-4-2 (±30 kV contact/air discharge) and UL 497B (E136766), and meets JESD201 Class 2 whisker resistance. The device is halogen-free, RoHS-compliant, and rated for operation from –55 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 45 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC bias margin. |
| VBR (Breakdown Voltage) | 50.0–55.3 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during surges. |
| VC (Clamping Voltage) | 72.7 V at 68.8 A (10/1000 μs) - Limits downstream voltage stress during worst-case surge events. |
| PPPM (Peak Pulse Power) | 5000 W - Sustains 10/1000 μs transients without failure; enables protection against ISO 7637-2 Pulse 1/2a/5a. |
| IR (Reverse Leakage) | ≤1.0 μA at VWM - Minimizes standby power loss and avoids false triggering in low-current circuits. |
| TJ max | +150 °C - Supports under-hood automotive environments and high-ambient industrial applications. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, MSL Level 1 (260 °C peak reflow), halogen-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lower-potential rail; completes current path during clamping. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 45 V supply); marked by color band; carries full surge current into anode. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping architecture | Protects DC-biased lines without forward conduction during normal operation; eliminates need for series blocking diodes. |
| 72.7 V clamping at 68.8 A (10/1000 μs) | Clamping ratio (VC/VWM) of 1.62 ensures <25% overvoltage margin for 45 V systems, preserving downstream ICs. |
| AEC-Q101 qualified | Validated for automotive powertrain and chassis modules per stress test requirements including HTOL, TCT, and ESD. |
| 30 kV HBM ESD immunity | Withstands repeated human-body-model discharges without parameter shift-critical for exposed connector interfaces. |
| RthJM = 4.0 °C/W | Enables >80% of 5000 W pulse energy to be conducted into PCB mount pad, reducing thermal runaway risk. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 45 V battery-supplied control module subjected to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary TVS clamp on main DC input rail, placed upstream of DC/DC converter and microcontroller LDOs. Use Value: Limits transient voltage to ≤72.7 V, preventing damage to 48 V-rated power management ICs and ensuring system reset integrity. |
Use Scenario: Analog output line (0–10 V) from pressure sensor in factory automation PLC I/O module. IC Role / Device Role / Timing Role: Point-of-entry protection at connector side, shunting ESD and inductive kickback from nearby solenoid actuation. Use Value: Sub-ns response clamps 8/20 μs surges to ≤94.6 V while maintaining <1 μA leakage at 10 V nominal, preserving signal accuracy. |
| MOSFET Gate Driver Protection | Telecom DC Power Feeder Protection |
Use Scenario: High-side N-channel MOSFET gate driven by 12 V logic in motor control half-bridge, exposed to Miller-induced spikes. IC Role / Device Role / Timing Role: Low-capacitance (typ. 120 pF at 0 V) TVS across gate-source, suppressing >20 V overshoots without loading driver. Use Value: Prevents gate oxide rupture by clamping spikes within 100 ps, with no impact on 100 kHz PWM timing due to negligible capacitance. |
Use Scenario: -48 V DC feeder line in telecom base station remote radio unit, subject to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Secondary-stage TVS after primary gas discharge tube, handling residual 10/1000 μs energy up to 5 kW. Use Value: Delivers precise 72.7 V clamping at 68.8 A to protect PoE-like interface ICs rated for -57 V absolute maximum, avoiding latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ45A | Same SMC package, 45 V VWM, but lower PPPM (400 W vs. 5000 W); clamping voltage 73.0 V at 54.9 A. | Rated for general-purpose consumer electronics only; not AEC-Q101 qualified or UL 497B recognized. | Select SMC5K45A-M3/I when automotive, industrial, or telecom surge levels exceed IEC 61000-4-5 Level 4 (4 kV/2 Ω). |
| ON Semiconductor SMAJ45AHE3/A | Same VWM and package, but 400 W PPPM and 73.0 V VC at 54.9 A; RoHS-compliant but no AEC-Q101 or UL recognition. | Lacks automotive qualification and safety certification; unsuitable for OEM automotive BOMs requiring traceable compliance. | Choose SMC5K45A-M3/I for designs requiring documented AEC-Q101, UL 497B, and 30 kV ESD immunity in production-critical applications. |
Compared with SMAJ45A and SMAJ45AHE3/A, the SMC5K45A-M3/I delivers 12.5× higher peak pulse power, certified automotive qualification, and safety agency recognition-making it the only option among the three suitable for ISO 16750-2 load dump and ISO 7637-2 Pulse 5a compliance without derating or parallel staging.
Availability
SMC5K45A-M3/I is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC analog I/O protection, and telecom DC power feeders requiring stable component supply with full compliance traceability.
Supply support for SMC5K45A-M3/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, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and automotive-grade validation.
The SMC5K45A-M3/I belongs to Vishay's TRANSZORB® SMC family, engineered specifically for high-energy transient suppression in harsh environments where standard TVS diodes fail-targeting automotive, industrial, and infrastructure applications demanding >5 kW surge capability.
FAQ
What is the clamping voltage of the SMC5K45A-M3/I at its rated peak pulse current?
The SMC5K45A-M3/I has a maximum clamping voltage (VC) of 72.7 V at 68.8 A using the 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024 (Document Number: 87742). The clamping voltage directly determines the maximum stress imposed on downstream components during surge events, making it a critical parameter for circuit survivability validation.
Is the SMC5K45A-M3/I qualified for automotive applications?
Yes, the SMC5K45A-M3/I is AEC-Q101 qualified, meeting the stress test requirements for automotive discrete semiconductors including high-temperature operating life, temperature cycling, and ESD. Although the base SMC5K45A is industrial-grade, the "-M3/I" suffix denotes Vishay's halogen-free, RoHS-compliant construction with full traceability-enabling use in automotive body electronics, infotainment power supplies, and ADAS sensor interfaces where qualification is mandatory.
What is the meaning of the "M3/I" suffix in SMC5K45A-M3/I?
The "M3" suffix indicates halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance, while "I" specifies packaging in 13-inch diameter plastic tape and reel with 3500 units per reel. This differs from "H" (7-inch reel, 850 units) and confirms the part is manufactured to Vishay's highest material and process standards for long-term reliability in automated SMT assembly lines.
Does the SMC5K45A-M3/I meet UL safety certification?
Yes, the SMC5K45A-M3/I is UL recognized under file E136766 per UL 497B for transient voltage surge suppressors used in telecommunications and data line applications. This certification validates its dielectric strength, flammability rating (UL 94 V-0 molding compound), and sustained surge withstand capability-essential for end-equipment safety approvals in North America and globally harmonized markets.
What is the thermal resistance from junction to mount (RthJM) for the SMC5K45A-M3/I?
The SMC5K45A-M3/I has a typical junction-to-mount thermal resistance (RthJM) of 4.0 °C/W, measured per JEDEC® 51-14 using the Transient Dual Interface Method. This low value enables efficient heat transfer from the silicon die into the PCB copper mount pad, supporting reliable operation during repetitive 5000 W pulses and extending lifetime in thermally constrained layouts such as dense automotive ECUs.
SMC5K45A-M3/I 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/I FAQ
1.How can I place an order for SMC5K45A-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K45A-M3/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 SMC5K45A-M3/I reliable?
The price and inventory of SMC5K45A-M3/I 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/I is usually 5 days.
3.What payment methods are accepted for SMC5K45A-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K45A-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K45A-M3/I?
SMC5K45A-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K45A-M3/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 SMC5K45A-M3/I?
For technical support, including SMC5K45A-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K45A-M3/I requirements.
6.How does Aetrix verify that SMC5K45A-M3/I is sourced from the original manufacturer or authorized distributors?
All SMC5K45A-M3/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 SMC5K45A-M3/I meets industry standards.
7.What is the process for return or replacement of SMC5K45A-M3/I?
All SMC5K45A-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K45A-M3/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 SMC5K45A-M3/I part is unused and in its original packaging.
Return procedure for SMC5K45A-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K45A-M3/I Tags
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