My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMC5K45CA-M3/I
- Part No.:
- SMC5K45CA-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K45CA-M3/I.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,287
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMC5K45CA-M3/I from Vishay General Semiconductor is a bidirectional 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), 45 V stand-off voltage (VWM), and 72.7 V maximum clamping voltage (VC) at 68.8 A. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics against lightning and inductive switching transients.
For engineers reviewing the SMC5K45CA-M3/I datasheet, SMC5K45CA-M3/I pinout, SMC5K45CA-M3/I application, or SMC5K45CA-M3/I equivalent, key selection criteria include bidirectional polarity, AEC-Q101 qualification, 175 °C max junction temperature, MSL Level 1 rating, and compatibility with 13" tape-and-reel automated assembly.
Technical Context
This TVS diode operates as a voltage-clamping device triggered by reverse-biased avalanche breakdown, with bidirectional symmetry enabling protection on AC-coupled or floating signal paths. Its low incremental surge resistance and fast response time (<1 ns) ensure minimal let-through energy during transient events.
The device delivers 5000 W peak pulse power under 10/1000 μs waveform and sustains 40 kW under 8/20 μs surge, validated per IEC 61000-4-2 ESD testing up to ±30 kV (contact/air). Thermal design is supported by RthJA = 90 °C/W and RthJM = 4.0 °C/W, enabling reliable operation up to TJ = 175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range for protected circuit. |
| VBR min/max | 50.0 V / 55.3 V - Breakdown voltage range at 1 mA test current; ensures consistent turn-on threshold across production lot. |
| VC @ IPPM | 72.7 V at 68.8 A (10/1000 μs) - Clamped voltage during rated surge; determines maximum stress imposed on downstream components. |
| PPPM | 5000 W - Peak pulse power handling capability under standard 10/1000 μs waveform; enables robust protection against common industrial surges. |
| TJ max | +175 °C - Maximum junction temperature; supports operation in under-hood automotive and high-ambient industrial environments. |
| ESD Rating | ±30 kV per IEC 61000-4-2 (HBM contact/air) - Confirmed immunity to electrostatic discharge, reducing need for additional ESD-level protection stages. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per AEC specification. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no cathode band marking. Matte tin-plated leads meet J-STD-002 solderability and JESD 201 Class 2 whisker resistance requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Bidirectional terminals enable identical clamping behavior in both polarities; no polarity orientation required during placement. |
| Case (cathode side) | Thermal and mechanical interface | Exposed metal pad provides primary thermal path to PCB copper; requires adequate thermal relief and mounting pad per Vishay SMC outline. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses, or floating nodes without polarity constraints. |
| 5000 W peak pulse power (10/1000 μs) | Supports high-energy surge suppression in 24 V/48 V industrial control systems and automotive power distribution networks. |
| AEC-Q101 qualification | Validates long-term reliability for automotive applications including body electronics, ADAS sensors, and powertrain subsystems. |
| MSL Level 1, 260 °C reflow compatible | Permits standard lead-free reflow assembly without moisture sensitivity concerns or pre-bake requirements. |
| UL 497B recognition (E136766) | Confirms compliance with safety standards for telecom and industrial equipment requiring certified surge protection devices. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
|
Use Scenario: Protection of 12 V/24 V power rails feeding ECUs, lighting modules, and actuators against load dump and alternator transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converters and LDOs to limit input stress. Use Value: Withstands 5000 W surges and clamps to 72.7 V, preventing damage to downstream regulators rated for ≤80 V absolute maximum input. |
Use Scenario: Shielding analog outputs (e.g., 4–20 mA, 0–10 V) and digital interfaces (CAN, LIN) in factory automation sensors. IC Role / Device Role / Timing Role: Fast-response shunt protector located at connector entry point to divert induced lightning or EFT energy. Use Value: Sub-1 ns response and 72.7 V clamping preserve signal integrity and prevent latch-up in precision ADC front-ends and microcontroller I/O. |
| Telecom Power Feeds | Consumer Appliance Motor Drivers |
|
Use Scenario: Surge protection on PoE-powered Ethernet ports and DSL line cards exposed to outdoor lightning coupling. IC Role / Device Role / Timing Role: Bidirectional TVS integrated into hybrid coupler or transformer secondary side to suppress common-mode transients. Use Value: 40 kW capability under 8/20 μs waveform meets ITU-T K.20/K.21 immunity requirements for central office equipment. |
Use Scenario: Input rail protection for BLDC motor driver boards in washing machines, HVAC fans, and power tools. IC Role / Device Role / Timing Role: Clamp placed across H-bridge supply to absorb inductive kickback from motor windings during PWM commutation. Use Value: 175 °C TJ max and robust 5000 W rating ensure sustained reliability in thermally constrained enclosed enclosures. |
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-M3/84A | Lower PPPM (400 W), SMA package (smaller footprint), unidirectional only. | Suitable for lower-energy consumer-grade circuits; not rated for automotive or industrial surge classes. | Select when space is critical and surge threat level is limited to IEC 61000-4-5 Level 2 (0.5 kV/1.0 kV). |
| SMCJ45CA-M3/84A | Same SMC package and bidirectional function, but higher PPPM (1500 W); not AEC-Q101 qualified. | Acceptable for industrial controls where automotive qualification is not mandated; lacks UL 497B recognition. | Choose for cost-sensitive non-automotive designs needing proven SMC form factor but lower surge margin than SMC5K45CA-M3/I. |
Compared with SMAJ45A-M3/84A and SMCJ45CA-M3/84A, the SMC5K45CA-M3/I delivers 3.3× higher peak pulse power than SMCJ45CA-M3/84A and 12.5× more than SMAJ45A-M3/84A, while maintaining AEC-Q101 qualification and UL safety listing-making it the only option among the three qualified for automotive power rail protection.
Availability
SMC5K45CA-M3/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor signal lines, telecom power feeds, and consumer appliance motor drivers requiring stable component supply and full traceability.
Supply support for SMC5K45CA-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, efficiency, and application-specific performance.
The SMC5KxxCA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power transient suppression in harsh-environment applications including automotive, industrial, and telecom infrastructure.
FAQ
What is the clamping voltage of the SMC5K45CA-M3/I under a 10/1000 μs surge?
The SMC5K45CA-M3/I has a maximum clamping voltage (VC) of 72.7 V when subjected to its rated peak pulse current of 68.8 A under the standard 10/1000 μs waveform. This value is measured per Fig. 3 in the Vishay datasheet 87024 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMC5K45CA-M3/I maintains this clamping performance across its full operating temperature range.
Is the SMC5K45CA-M3/I suitable for automotive applications?
Yes, the SMC5K45CA-M3/I is AEC-Q101 qualified and explicitly listed in Vishay's automotive-grade product documentation. It meets requirements for temperature cycling, mechanical shock, and humidity bias testing, and is commonly deployed in automotive power distribution modules, body control units, and ADAS sensor interfaces. The SMC5K45CA-M3/I also carries UL 497B recognition (file E136766), supporting safety-compliant designs.
What does the "-M3/I" suffix indicate in SMC5K45CA-M3/I?
The "-M3" suffix denotes halogen-free, RoHS-compliant construction with matte tin-plated leads meeting J-STD-002 and JESD 201 Class 2 whisker resistance. The "/I" indicates packaging in 13-inch diameter plastic tape and reel, with a base quantity of 3500 units per reel-optimized for high-volume SMT assembly. This differs from "/H", which uses 7-inch reels with 850 units.
Does the SMC5K45CA-M3/I have polarity markings on the package?
No, the SMC5K45CA-M3/I is a bidirectional TVS diode and carries no cathode band or polarity marking on the SMC (DO-214AB) case. Its symmetrical construction allows installation in either orientation on the PCB, simplifying layout and eliminating risk of reverse placement. Polarity independence is confirmed in the Vishay datasheet footnote stating "no cathode band for bidirectional types".
What is the thermal resistance from junction to ambient for the SMC5K45CA-M3/I?
The SMC5K45CA-M3/I has a typical thermal resistance of RthJA = 90 °C/W when mounted on a standard FR4 PCB with 2 oz. copper per JEDEC 51-2A guidelines. This value assumes the recommended mounting pad layout shown in the Vishay package drawing. For thermal management in high-power or high-ambient applications, designers should verify actual board-level thermal performance using the provided RthJM = 4.0 °C/W metric.
SMC5K45CA-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:
- -
- Bidirectional Channels:
- 1
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMC5K45CA-M3/I FAQ
1.How can I place an order for SMC5K45CA-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K45CA-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 SMC5K45CA-M3/I reliable?
The price and inventory of SMC5K45CA-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 SMC5K45CA-M3/I is usually 5 days.
3.What payment methods are accepted for SMC5K45CA-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K45CA-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K45CA-M3/I?
SMC5K45CA-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K45CA-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 SMC5K45CA-M3/I?
For technical support, including SMC5K45CA-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K45CA-M3/I requirements.
6.How does Aetrix verify that SMC5K45CA-M3/I is sourced from the original manufacturer or authorized distributors?
All SMC5K45CA-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 SMC5K45CA-M3/I meets industry standards.
7.What is the process for return or replacement of SMC5K45CA-M3/I?
All SMC5K45CA-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K45CA-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 SMC5K45CA-M3/I part is unused and in its original packaging.
Return procedure for SMC5K45CA-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K45CA-M3/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
