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Vishay General Semiconductor - Diodes Division SMC5K26A-M3/I
- Part No.:
- SMC5K26A-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K26A-M3/I.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:36,024
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Product details
Overview
SMC5K26A-M3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on power and signal lines. It features a 26 V stand-off voltage (VWM), 28.9–31.9 V breakdown voltage (VBR) at 1 mA, 42.1 V clamping voltage (VC) at 119 A peak pulse current (IPPM), and 5000 W peak pulse power (10/1000 μs).
For engineers reviewing the SMC5K26A-M3/I datasheet, SMC5K26A-M3/I pinout, SMC5K26A-M3/I application, or SMC5K26A-M3/I equivalent, this device is selected for robust overvoltage protection in automotive power supplies, industrial sensor interfaces, and telecom DC input rails where fast response (<1 ns), low clamping ratio, and AEC-Q101 qualification are not required - only SMC5K10A–SMC5K20A variants carry HM3 suffix with AEC-Q101.
Technical Context
The SMC5K26A-M3/I operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified VBR range. Its clamping action limits transient-induced voltage spikes to ≤42.1 V under 119 A (10/1000 μs), with thermal resistance RthJA of 90 °C/W enabling reliable operation up to TJ = 150 °C.
It meets IEC 61000-4-2 ESD immunity (30 kV contact/air), UL 497B recognition (E136766), and J-STD-020 MSL Level 1 (260 °C reflow). The M3 suffix confirms halogen-free, RoHS-compliant construction and JESD 201 Class 2 whisker resistance - but it is not AEC-Q101 qualified, as that applies only to HM3-suffixed SMC5K10A–SMC5K20A parts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 28.9 V / 31.9 V at 1 mA - ensures predictable turn-on threshold across production lot |
| VC @ IPPM | 42.1 V at 119 A (10/1000 μs) - defines worst-case protected line voltage during surge |
| PPPM | 5000 W (10/1000 μs) - supports high-energy transients common in automotive load dump or inductive switching |
| TJ max | +150 °C - enables use in under-hood or industrial enclosures without derating below ambient |
| ESD rating | 30 kV HBM (contact/air) - exceeds IEC 61000-4-2 Level 4 for system-level ESD robustness |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 3.2 mm × 5.59 mm footprint and 2.6 mm height |
Pinout & Package
SMC5K26A-M3/I uses the standard SMC (DO-214AB) package: molded epoxy case with matte tin-plated leads, cathode indicated by a color band. Mounting requires 0.126" (3.20 mm) minimum pad length and 0.060" (1.52 mm) minimum pad width per JEDEC MS-013.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when Vreverse > VBR |
| Anode | Reference/return path | Typically tied to system ground or low-impedance return plane to complete clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| 5000 W peak pulse power (10/1000 μs) | Enables protection against severe load-dump transients in 12 V automotive systems without cascaded TVS stages |
| Clamping voltage ratio (VC/VWM) = 1.62 | Minimizes voltage overshoot during clamping, preserving margin for downstream 3.3 V or 5 V ICs |
| Low incremental surge resistance | Reduces dynamic voltage rise during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a), improving protection fidelity |
| UL 497B recognized (E136766) | Validates safety compliance for use in telecom and industrial equipment requiring certified surge protection components |
| Halogen-free & RoHS-compliant (M3) | Meets environmental regulations for global electronics manufacturing and end-of-life handling |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to load-dump transients (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping element placed between input fuse and DC-DC converter input. Use Value: Limits surge voltage to ≤42.1 V, preventing damage to upstream regulators rated for 45 V absolute max. | Use Scenario: 4–20 mA current-loop sensors in factory automation subject to cable ESD and inductive coupling. IC Role / Device Role / Timing Role: Bidirectional protection is unnecessary; unidirectional SMC5K26A-M3/I guards analog input against negative-going transients only. Use Value: Clamps fast transients (<1 ns response) while adding <100 pF capacitance at 26 V bias - negligible impact on loop bandwidth. |
| Telecom DC Power Feeds | Consumer Power Adapter Outputs |
Use Scenario: -48 V DC distribution in base station cabinets encountering lightning-induced surges on long feeder lines. IC Role / Device Role / Timing Role: Paired with higher-voltage TVS (e.g., SMC5K64A) in series or used standalone for secondary protection after primary MOV stage. Use Value: Withstands 119 A peak pulse (10/1000 μs), providing redundancy to primary suppression and extending system MTBF. | Use Scenario: USB-C PD adapters with 20 V PPS output, where output short-circuit or hot-plug events induce voltage spikes. IC Role / Device Role / Timing Role: Output-side TVS placed after DC-DC controller and before connector, referenced to output ground. Use Value: 26 V VWM matches typical 20 V PPS upper limit with 30 % margin; 42.1 V clamping prevents latch-up in connected devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A | Lower PPPM (400 W), same VWM/VBR range, SMA package (smaller footprint, lower thermal mass) | Not suitable for 5000 W surges; limited to low-energy ESD or board-level coupling events | Select SMAJ26A only when space-constrained and surge energy is ≤400 W (e.g., USB data lines) |
| SMCJ26A | Same SMC package, identical VWM/VBR/VC specs, but rated for 1500 W (10/1000 μs) - not 5000 W | Lacks capability for automotive load-dump or industrial motor-switching transients | Choose SMCJ26A only for cost-sensitive designs where 1500 W protection suffices and 5000 W headroom is unnecessary |
Compared with SMAJ26A and SMCJ26A, the SMC5K26A-M3/I delivers 3.3× more peak pulse power than SMCJ26A and 12.5× more than SMAJ26A - making it uniquely suited for high-energy transient environments where sustained clamping performance and thermal stability are critical.
Availability
SMC5K26A-M3/I is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface hardening, and telecom DC feed surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMC5K26A-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, power efficiency, and application-specific optimization.
The SMC5KxxA family was engineered for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure due to voltage surges must be eliminated through proven 5 kW surge handling and robust packaging.
FAQ
What is the clamping voltage of SMC5K26A-M3/I at its rated peak pulse current?
The SMC5K26A-M3/I has a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current of 119 A under the standard 10/1000 μs waveform. This value is measured per Figure 3 in the Vishay datasheet 87742 and defines the upper voltage limit imposed on the protected circuit during surge events. The clamping performance remains stable across temperature and lifetime when operated within its specified junction temperature range of –55 °C to +150 °C.
Is SMC5K26A-M3/I AEC-Q101 qualified?
No, the SMC5K26A-M3/I is not AEC-Q101 qualified. Per Vishay documentation, AEC-Q101 qualification applies exclusively to the HM3-suffixed variants of SMC5K10A through SMC5K20A (e.g., SMC5K20AHM3_A/I). The SMC5K26A-M3/I carries the M3 suffix, indicating halogen-free, RoHS-compliant construction and JESD 201 Class 2 whisker resistance, but no automotive qualification. For AEC-Q101 requirements, engineers must select an HM3-part within the 10–20 V VWM range.
What is the meaning of the "-M3/I" suffix in SMC5K26A-M3/I?
The "-M3/I" suffix in SMC5K26A-M3/I denotes two distinct attributes: "M3" specifies halogen-free, RoHS-compliant materials and compliance with JESD 201 Class 2 whisker resistance testing; "I" indicates packaging in 13-inch diameter plastic tape and reel, with a base quantity of 3500 units per reel. This differs from the "H" suffix (7-inch reel, 850 units), and both are compatible with standard SMT pick-and-place equipment using JEDEC MS-013 mounting guidelines.
Can SMC5K26A-M3/I be used in bidirectional protection circuits?
No, the SMC5K26A-M3/I is a unidirectional TVS diode and is not suitable for bidirectional protection. Its electrical characteristics - including breakdown voltage, clamping behavior, and polarity marking - are defined only for reverse-biased operation (cathode positive relative to anode). For AC or dual-polarity signal lines, a dedicated bidirectional TVS (e.g., SMC5K26CA) or back-to-back unidirectional configuration is required. Using SMC5K26A-M3/I in forward bias risks permanent damage due to excessive forward current beyond its rated surge capability.
What is the thermal resistance junction-to-ambient (RthJA) for SMC5K26A-M3/I?
The thermal resistance junction-to-ambient (RthJA) for SMC5K26A-M3/I is 90 °C/W, measured per JEDEC 51-2A on a standard FR4 PCB with 2 oz. copper and the recommended SMC mounting pad layout. This value assumes natural convection cooling and directly impacts steady-state power dissipation limits and transient thermal response. When designing for repeated surge events, thermal design must ensure peak junction temperature stays below 150 °C, especially at elevated ambient temperatures above 25 °C.
SMC5K26A-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):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 119A
- 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)
SMC5K26A-M3/I FAQ
1.How can I place an order for SMC5K26A-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K26A-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 SMC5K26A-M3/I reliable?
The price and inventory of SMC5K26A-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 SMC5K26A-M3/I is usually 5 days.
3.What payment methods are accepted for SMC5K26A-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K26A-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K26A-M3/I?
SMC5K26A-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K26A-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 SMC5K26A-M3/I?
For technical support, including SMC5K26A-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K26A-M3/I requirements.
6.How does Aetrix verify that SMC5K26A-M3/I is sourced from the original manufacturer or authorized distributors?
All SMC5K26A-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 SMC5K26A-M3/I meets industry standards.
7.What is the process for return or replacement of SMC5K26A-M3/I?
All SMC5K26A-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K26A-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 SMC5K26A-M3/I part is unused and in its original packaging.
Return procedure for SMC5K26A-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K26A-M3/I Tags
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