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Vishay General Semiconductor - Diodes Division SMC5K70A-M3/I
- Part No.:
- SMC5K70A-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K70A-M3/I.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMC5K70A-M3/I 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), 113 V clamping voltage at 44.2 A, and 70 V standoff voltage. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMC5K70A-M3/I datasheet, SMC5K70A-M3/I pinout, SMC5K70A-M3/I application, or SMC5K70A-M3/I equivalent, key selection criteria include its 77.8–86.0 V breakdown range, AEC-Q101 qualification (industrial grade only per note), 150 °C max junction temperature, and compatibility with automated SMT assembly using 13" tape-and-reel delivery.
Technical Context
This TVS diode operates as a unidirectional clamping device, triggered when reverse voltage exceeds its breakdown threshold (VBR = 77.8–86.0 V). Its low incremental surge resistance and fast response time enable effective suppression of transients from inductive switching and lightning surges on DC power rails and signal paths.
It delivers 5000 W peak pulse power under 10/1000 μs waveform and sustains 40 kW under 8/20 μs waveform, with clamping voltage tightly specified at 113 V (10/1000 μs) and 146 V (8/20 μs) - critical for ensuring downstream component voltage margins remain intact during surge events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous reverse operating voltage before conduction begins; defines safe DC bias limit for protected circuit |
| VBR (min/max) | 77.8 V / 86.0 V - guaranteed breakdown onset range at 1 mA test current; ensures predictable turn-on across temperature and lot variation |
| VC @ IPPM (10/1000 μs) | 113 V - clamped voltage at 44.2 A peak pulse; determines maximum stress imposed on downstream components during surge |
| PPPM | 5000 W - peak pulse power handling capability with 10/1000 μs waveform; validates robustness against common industrial surge profiles |
| TJ max | +150 °C - maximum junction temperature rating; supports operation in under-hood automotive and high-ambient industrial environments |
| ESD immunity | 30 kV HBM (contact/air) - meets IEC 61000-4-2 level for system-level ESD robustness without external shielding |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, M3 suffix indicating JESD 201 Class 2 whisker resistance. Cathode identified by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction; grounded or connected to lower-potential rail in unidirectional clamp configuration | Provides reference node for clamping action; must be routed with low-inductance path to minimize overshoot during fast transients |
| Cathode | Current exit terminal during reverse clamping; connected to protected line (e.g., +12 V rail or signal trace) | Defines clamping reference point; polarity marking (band) prevents misorientation in automated placement |
Key Features
| Feature | Design Value |
|---|---|
| 5000 W peak pulse power (10/1000 μs) | Enables protection against high-energy transients common in 24 V/48 V industrial control and automotive power distribution systems |
| Clamping voltage ≤ 113 V at 44.2 A | Ensures protected 75 V-rated components (e.g., certain MOSFETs or regulators) remain within safe operating area during worst-case surge |
| Unidirectional polarity | Allows integration into DC-biased circuits without blocking normal forward current flow; eliminates need for series blocking diodes |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free reflow soldering without moisture-related delamination or popcorn failure |
| UL 497B recognized (E136766) | Validates safety compliance for use in telecom and industrial equipment requiring third-party certification |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Suppressing load-dump spikes (up to 120 V, 400 ms) and alternator ripple on 12 V/24 V battery-fed ECUs and body controllers. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed directly at power input connector to shunt surge energy to ground before reaching DC/DC converters and microcontrollers. Use Value: Limits transient voltage to ≤113 V, preserving integrity of 75 V-rated input-stage MOSFETs and enabling reliable operation per ISO 7637-2 Pulse 5a requirements. | Use Scenario: Protecting 24 V digital input modules in programmable logic controllers from field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Standoff-clamp TVS mounted at terminal block entry, conducting only during overvoltage events while remaining high-impedance during normal 24 V operation. Use Value: Withstands 40 kW (8/20 μs) surges per IEC 61000-4-5 Level 4, preventing latch-up or damage to optocoupler input stages and front-end protection FETs. |
| Sensor Signal Line Protection | Telecom DC Power Interface |
Use Scenario: Safeguarding analog and CAN signal lines (e.g., engine coolant temp, pressure sensors) from ESD and coupled transients in harsh vehicle environments. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed adjacent to connector, clamping fast-rising ESD pulses (<1 ns rise) before they reach precision ADC inputs or transceiver ICs. Use Value: 30 kV HBM ESD rating and sub-100 ps response ensure immunity to contact discharge events without distorting low-voltage sensor signals. | Use Scenario: Guarding -48 V DC power feeds in telecom base station equipment against lightning-induced surges entering via outdoor cabling. IC Role / Device Role / Timing Role: Primary clamping element in multi-stage protection scheme, absorbing bulk surge energy upstream of secondary MOVs and gas discharge tubes. Use Value: 5000 W 10/1000 μs rating and 146 V clamping at 8/20 μs allow coordination with downstream protectors to meet GR-1089-CORE Level 3 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70A-M3/5A | Lower peak pulse power (600 W vs. 5000 W); SMB (DO-214AA) package; same VWM/VBR range | Targeted for low-energy signal-line protection; insufficient for power rail or load-dump scenarios | Select only for space-constrained PCBs where surge energy is limited to <100 mJ |
| SMCJ70A-M3/86A | Same SMC package and 5000 W rating; tighter VBR tolerance (77.8–82.2 V vs. 77.8–86.0 V); identical clamping performance | Drop-in replacement where tighter breakdown consistency is required for margin-critical designs | Preferred when statistical VBR distribution must be minimized across production lots |
Compared with SMC5K70A-M3/I, SMBJ70A-M3/5A offers smaller footprint but lacks the energy-handling capacity for power-line protection, while SMCJ70A-M3/86A provides identical surge capability with improved VBR uniformity - making it suitable for high-reliability automotive modules where parametric consistency is prioritized.
Availability
SMC5K70A-M3/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power interface designs requiring stable component supply and long-term lifecycle support.
Supply support for SMC5K70A-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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SMC5KxxA family is engineered for high-energy transient suppression in demanding DC power and signal-line applications across automotive, industrial, and telecom infrastructure - delivering robust clamping with industry-leading power density in the SMC package.
FAQ
What is the breakdown voltage range of the SMC5K70A-M3/I?
The SMC5K70A-M3/I has a guaranteed breakdown voltage (VBR) range of 77.8 V to 86.0 V at 1.0 mA test current, measured per ANSI/IEEE C62.35 standards. This range ensures consistent clamping onset across manufacturing lots and temperature extremes, and is confirmed in the official Vishay datasheet document 87742, revision 09-Jan-2024. The SMC5K70A-M3/I maintains this specification under standard test conditions (TA = 25 °C).
Is the SMC5K70A-M3/I AEC-Q101 qualified?
No, the SMC5K70A-M3/I is not AEC-Q101 qualified. Per the Vishay datasheet (document 87742, page 1), AEC-Q101 qualification applies only to SMC5K10A through SMC5K20A with HM3 suffix. The SMC5K70A-M3/I is designated for industrial-grade applications only, as explicitly noted in the "Note" section on page 1: "SMC5K22A to SMC5K85A for industrial grade only." The SMC5K70A-M3/I retains all other specifications including UL recognition and MSL Level 1.
What does the "-M3/I" suffix indicate in SMC5K70A-M3/I?
The "-M3/I" suffix in SMC5K70A-M3/I specifies two attributes: "M3" denotes halogen-free, RoHS-compliant construction meeting JESD 201 Class 2 whisker resistance, and "I" indicates packaging in 13-inch diameter plastic tape-and-reel with a base quantity of 3500 units. This format is defined in the Ordering Information table (page 3 of datasheet 87742) and distinguishes it from the "-M3/H" variant (7-inch reel, 850 units). The SMC5K70A-M3/I is optimized for high-volume SMT production lines requiring large reels.
What is the clamping voltage of the SMC5K70A-M3/I at its rated peak pulse current?
The SMC5K70A-M3/I clamps to a maximum of 113 V at its rated peak pulse current of 44.2 A under the 10/1000 μs waveform (per Table on page 2 of datasheet 87742). Under the higher-energy 8/20 μs waveform, it clamps to 146 V at 274 A. These values define the upper voltage limit imposed on protected circuitry during standardized surge events and are critical for validating safe operating margins of downstream components in the SMC5K70A-M3/I design.
Can the SMC5K70A-M3/I be used in bidirectional configurations?
No, the SMC5K70A-M3/I is strictly unidirectional and must not be used in bidirectional applications. Its internal structure and electrical characteristics - including polarity marking (cathode band), specified VWM/VBR only in reverse direction, and absence of symmetrical parameters - confirm single-quadrant operation. For bidirectional protection, Vishay offers separate part numbers such as SMC5K70CA-M3/I. Using the SMC5K70A-M3/I in reverse-biased AC or dual-polarity circuits will result in improper clamping and potential device failure.
SMC5K70A-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):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 44.2A
- 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)
SMC5K70A-M3/I FAQ
1.How can I place an order for SMC5K70A-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K70A-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 SMC5K70A-M3/I reliable?
The price and inventory of SMC5K70A-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 SMC5K70A-M3/I is usually 5 days.
3.What payment methods are accepted for SMC5K70A-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K70A-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K70A-M3/I?
SMC5K70A-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K70A-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 SMC5K70A-M3/I?
For technical support, including SMC5K70A-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K70A-M3/I requirements.
6.How does Aetrix verify that SMC5K70A-M3/I is sourced from the original manufacturer or authorized distributors?
All SMC5K70A-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 SMC5K70A-M3/I meets industry standards.
7.What is the process for return or replacement of SMC5K70A-M3/I?
All SMC5K70A-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K70A-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 SMC5K70A-M3/I part is unused and in its original packaging.
Return procedure for SMC5K70A-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K70A-M3/I Tags
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