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Vishay General Semiconductor - Diodes Division SMC5K75CA-M3/I
- Part No.:
- SMC5K75CA-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K75CA-M3/I.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,968
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Product details
Overview
SMC5K75CA-M3/I 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), 75 V stand-off voltage (VWM), and 121 V maximum clamping voltage at 41.3 A IPPM - deployed on power rails and signal lines of automotive ECUs and industrial motor drives.
For engineers reviewing the SMC5K75CA-M3/I datasheet, SMC5K75CA-M3/I pinout, SMC5K75CA-M3/I application, or SMC5K75CA-M3/I equivalent, this page delivers verified electrical ratings, AEC-Q101 qualification status, thermal resistance values, clamping performance under 8/20 μs surges, and direct alternative part comparisons for robust overvoltage design validation.
Technical Context
This TVS diode operates bidirectionally to clamp transient voltages above ±83.3 V breakdown (VBR min) and below ±92.1 V (VBR max) at 1 mA test current, maintaining reverse leakage ≤1.0 μA at 75 V VWM. Its low incremental surge resistance ensures stable clamping during fast transients induced by inductive switching or ESD events.
Thermal design is supported by RthJA = 90 °C/W (JEDEC 51-2A, FR4, 2 oz.) and RthJM = 4.0 °C/W (JEDEC 51-14 TDIM), enabling reliable operation up to TJ = +175 °C. It meets IEC 61000-4-2 contact/air discharge at 30 kV and UL 497B safety recognition (E136766).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin in protected circuits. |
| VBR (min/max) | 83.3 V / 92.1 V at 1 mA - precise breakdown threshold range ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM (10/1000 μs) | 121 V at 41.3 A - clamping voltage under standard lightning surge waveform; determines protected IC's maximum stress exposure. |
| PPPM | 5000 W (10/1000 μs) - peak surge energy handling capacity; validates suitability for IEC 61000-4-5 Level 4 compliance designs. |
| TJ max. | +175 °C - maximum junction temperature rating; supports under-hood automotive and high-ambient industrial deployments. |
| AEC-Q101 | Qualified - certified for automotive-grade reliability per stress test requirements including HTGB, HTRB, and TCT. |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 0.320" x 0.246" footprint; compatible with automated pick-and-place and reflow. |
Pinout & Package
SMC (DO-214AB) package: molded epoxy case with matte tin-plated leads, MSL Level 1 (260 °C peak reflow), halogen-free and RoHS-compliant. Bidirectional construction has no cathode band; terminals are symmetrical and non-polarized.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals serve identical roles; device conducts equally in either direction when voltage exceeds VBR magnitude. |
| Case (exposed metal pad) | Thermal interface / mechanical anchor | Not electrically connected; provides thermal dissipation path to PCB copper and mechanical stability during board flex or vibration. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns or external biasing. |
| 40 kW surge capability (8/20 μs) | Supports high-current lightning-induced transients per IEC 61000-4-5, with VC = 157 V at 255 A - critical for telecom and EV charging interfaces. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot relative to breakdown, reducing risk of downstream component damage in sensitive analog front-ends. |
| AEC-Q101 qualification | Validates long-term reliability in automotive environments including temperature cycling, humidity, and mechanical shock testing. |
| UL 497B recognition (E136766) | Confirms compliance with safety standards for primary circuit protection in industrial power supplies and building automation systems. |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive I/O |
|---|---|
|
Use Scenario: Protecting 12 V/24 V battery-fed microcontroller power inputs against load dump and alternator ripple in engine control units. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of LDO regulators and CAN transceivers. Use Value: Withstands 5000 W surges and maintains clamping at 121 V, preventing brownout or latch-up in MCU core logic during ISO 7637-2 Pulse 5a events. |
Use Scenario: Shielding encoder feedback lines and digital I/O ports in variable-frequency drives exposed to inductive kickback from relay coils and contactors. IC Role / Device Role / Timing Role: Fast-response shunt protector on differential RS-485 or PWM signal traces. Use Value: Sub-nanosecond response time and 30 kV ESD immunity ensure signal integrity remains intact during factory floor EMI events. |
| Telecom Surge Interface | Consumer Sensor Signal Line |
|
Use Scenario: Front-end protection for PoE-powered Ethernet switches and base station RF module power inputs subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level TVS after gas discharge tube (GDT) in hybrid protection networks. Use Value: 40 kW (8/20 μs) rating and 157 V clamping at 255 A enable coordination with upstream GDTs for full IEC 61000-4-5 Level 4 compliance. |
Use Scenario: Safeguarding MEMS accelerometer and temperature sensor outputs in smart home hubs and wearable devices. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF at 0 V) bidirectional clamp on I²C or SPI bus lines. Use Value: 1.0 μA leakage at 75 V VWM preserves battery life in always-on sensing nodes while delivering 30 kV HBM ESD protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CA | Lower PPPM (600 W), same VWM (75 V), SMB package (smaller footprint, higher RthJA = 110 °C/W) | Targeted at space-constrained consumer electronics with lower surge threat levels (IEC 61000-4-2 only) | Select SMBJ75CA only if system-level surge testing does not exceed 1 kV/0.5 Ω IEC 61000-4-5 and thermal margin allows higher junction rise. |
| SMCJ75CA | Higher PPPM (1500 W), same VWM (75 V), identical SMC package but non-AEC-Q101 rated | Suitable for industrial controls where automotive qualification is unnecessary but higher surge margin than SMBJ is required | Choose SMCJ75CA when AEC-Q101 is not mandated and cost sensitivity favors Vishay's industrial-grade variant over automotive-qualified SMC5K75CA-M3/I. |
Compared with SMBJ75CA and SMCJ75CA, the SMC5K75CA-M3/I delivers 3.3× higher peak pulse power than SMBJ75CA and 3.3× higher than SMCJ75CA, while uniquely combining AEC-Q101 qualification, UL 497B listing, and 40 kW 8/20 μs capability - making it the only option among the three qualified for automotive power rail and telecom infrastructure surge zones.
Availability
SMC5K75CA-M3/I is available at Aetrix Electronics and suitable for automotive ECU designs, industrial motor drive I/O protection, telecom surge interface modules, and consumer sensor signal line hardening requiring stable component supply across multi-year production cycles.
Supply support for SMC5K75CA-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 optimization.
The SMC5KxxCA series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in automotive, industrial, and telecom systems where AEC-Q101 compliance and multi-kW surge resilience are mandatory.
FAQ
What is the breakdown voltage range of the SMC5K75CA-M3/I?
The SMC5K75CA-M3/I has a guaranteed breakdown voltage (VBR) range of 83.3 V to 92.1 V at 1 mA test current, measured per ANSI/IEEE C62.35. This tight tolerance ensures consistent clamping onset across production lots and enables precise coordination with downstream overvoltage protection thresholds in power management ICs.
Is the SMC5K75CA-M3/I suitable for automotive applications?
Yes, the SMC5K75CA-M3/I is AEC-Q101 qualified and rated for operation from –55 °C to +175 °C, making it suitable for under-hood and powertrain applications. Its 5000 W (10/1000 μs) and 40 kW (8/20 μs) surge ratings meet ISO 7637-2 and IEC 61000-4-5 requirements common in automotive ECU designs.
What is the clamping voltage of the SMC5K75CA-M3/I at its rated peak pulse current?
At its rated 10/1000 μs peak pulse current of 41.3 A, the SMC5K75CA-M3/I clamps to a maximum of 121 V. Under the more severe 8/20 μs waveform, it clamps to 157 V at 255 A - both values confirmed in Vishay's official datasheet (Doc. #87024, Rev. 10-Sep-2024).
Does the SMC5K75CA-M3/I have polarity markings?
No, the SMC5K75CA-M3/I is a bidirectional TVS diode and carries no cathode band or polarity marking. Its symmetrical construction means either terminal may be connected to the line or ground side of the protected circuit - simplifying layout and eliminating orientation errors during assembly.
What is the thermal resistance specification for the SMC5K75CA-M3/I?
The SMC5K75CA-M3/I has a junction-to-ambient thermal resistance (RthJA) of 90 °C/W per JEDEC 51-2A on FR4 with 2 oz. copper, and a junction-to-mount thermal resistance (RthJM) of 4.0 °C/W per JEDEC 51-14 TDIM. These values are critical for calculating steady-state temperature rise under sustained leakage or repetitive surge conditions.
SMC5K75CA-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):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 41.3A
- 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)
SMC5K75CA-M3/I FAQ
1.How can I place an order for SMC5K75CA-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K75CA-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 SMC5K75CA-M3/I reliable?
The price and inventory of SMC5K75CA-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 SMC5K75CA-M3/I is usually 5 days.
3.What payment methods are accepted for SMC5K75CA-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K75CA-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K75CA-M3/I?
SMC5K75CA-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K75CA-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 SMC5K75CA-M3/I?
For technical support, including SMC5K75CA-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K75CA-M3/I requirements.
6.How does Aetrix verify that SMC5K75CA-M3/I is sourced from the original manufacturer or authorized distributors?
All SMC5K75CA-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 SMC5K75CA-M3/I meets industry standards.
7.What is the process for return or replacement of SMC5K75CA-M3/I?
All SMC5K75CA-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K75CA-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 SMC5K75CA-M3/I part is unused and in its original packaging.
Return procedure for SMC5K75CA-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K75CA-M3/I Tags
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