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Vishay General Semiconductor - Diodes Division SMC5K26A-M3/H
- Part No.:
- SMC5K26A-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K26A-M3/H.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:507
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Product details
Overview
SMC5K26A-M3/H 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/H datasheet, SMC5K26A-M3/H pinout, SMC5K26A-M3/H application, or SMC5K26A-M3/H equivalent, this device is selected for automotive-grade ESD/surge protection where fast response (<1 ns), low clamping ratio (VC/VBR ≈ 1.37), and AEC-Q101 qualification are critical - especially in 24 V system interfaces, sensor I/O, and MOSFET gate protection.
Technical Context
This TVS operates as a voltage-clamped shunt protector: under normal bias it presents <1.0 μA leakage at 26 V; during transients exceeding VBR, it avalanches to clamp voltage at ≤42.1 V within nanoseconds. Its unidirectional polarity (cathode-banded) enables DC-biased line protection without reverse conduction path concerns.
Thermal design relies on low junction-to-mount thermal resistance (RthJM = 4.0 °C/W) and JEDEC-compliant mounting on FR4 PCBs. It meets IEC 61000-4-2 (30 kV contact/air discharge) and is halogen-free, RoHS-compliant, and MSL Level 1 rated (260 °C reflow peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before avalanche onset; defines safe DC working range for 24 V nominal systems. |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - Tight breakdown tolerance ensures predictable turn-on across temperature and production lot. |
| VC @ IPPM | 42.1 V at 119 A (10/1000 μs) - Clamping voltage limits downstream IC stress; clamping ratio VC/VBR = 1.37 supports robust overvoltage margin. |
| PPPM | 5000 W (10/1000 μs) - Sustains high-energy surges common in automotive load-dump or inductive switching events. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures with elevated ambient temperatures. |
| ESD Rating | 30 kV HBM (contact & air) - Meets stringent electrostatic discharge immunity requirements for exposed connectors and sensor interfaces. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, halogen-free, RoHS-compliant, MSL Level 1 (260 °C peak reflow). Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or lowest potential node; completes shunt path during transient conduction. |
| Cathode | High-side protected node | Connected to line being protected (e.g., 24 V rail or sensor signal); avalanche initiates here when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Peak pulse power rating | 5000 W (10/1000 μs) - Handles automotive load-dump pulses per ISO 7637-2 without degradation. |
| Clamping performance | VC = 42.1 V at 119 A - Limits voltage overshoot to <1.6× VWM, protecting 30 V-rated MOSFETs and interface ICs. |
| AEC-Q101 qualification | Qualified for automotive applications (note: SMC5K26A is industrial grade; HM3 suffix required for AEC-Q101 - not applicable to -M3/H) |
| Response time | <1 ns - Faster than typical MOVs or polymer-based protectors, preserving signal integrity on high-speed lines. |
| Thermal robustness | RthJM = 4.0 °C/W - Enables efficient heat transfer to PCB copper pour, supporting sustained surge duty cycles. |
Applications
| Automotive Sensor Protection | Industrial 24 V Power Rail |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from ESD and switching transients in vehicle cabins and engine bays. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector entry point, clamping surges before they reach sensitive analog front-ends or communication ICs. Use Value: Maintains signal fidelity by limiting transient overshoot to ≤42.1 V while surviving repeated 30 kV ESD strikes per IEC 61000-4-2. |
Use Scenario: Safeguarding PLC I/O modules, motor drivers, and solenoid controllers powered from 24 V DC supplies subject to inductive kickback and lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main 24 V input rail, coordinated with upstream fuses and downstream LDOs to define layered protection architecture. Use Value: Absorbs up to 5000 W of transient energy (10/1000 μs), preventing latch-up or permanent damage to 24 V-rated power management ICs. |
| Telecom Interface Protection | Consumer Appliance Control Board |
|
Use Scenario: Shielding Ethernet PHYs, RS-485 transceivers, and PoE injectors against induced surges from nearby AC wiring or antenna coupling in base stations and network equipment. IC Role / Device Role / Timing Role: Unidirectional TVS placed on differential pairs or power pins to suppress common-mode and differential-mode transients without affecting DC bias. Use Value: Low incremental surge resistance ensures minimal voltage rise during high-current events, preserving data integrity on 100 Mbps+ links. |
Use Scenario: Securing microcontroller GPIOs, relay drivers, and display backlight circuits in washing machines, HVAC controls, and smart home hubs exposed to user-handling ESD and mains-coupled noise. IC Role / Device Role / Timing Role: Point-of-use protector mounted adjacent to connectors and switches to intercept human-body-model discharges before reaching MCU pins. Use Value: UL 497B recognition and 30 kV HBM rating ensure compliance with IEC 61000-4-2 Level 4, reducing field failure rates in consumer logistics and end-use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26A-M3/5A | Same VWM (26 V), lower PPPM (600 W), SMB package (smaller footprint, higher RthJA = 110 °C/W) | Lower surge capacity; suitable only for light-duty consumer electronics, not automotive or industrial 24 V rails | Select SMBJ26A-M3/5A only when board space is constrained and peak surge energy remains below 600 W. |
| SMCJ26A-M3/H | Same SMC package, identical VWM/VBR/VC specs, but rated for 1500 W (10/1000 μs) - not 5000 W | Lacks capability for severe load-dump or lightning-level transients; used in cost-sensitive industrial designs with lower surge exposure | Choose SMCJ26A-M3/H if system-level testing confirms worst-case surge energy stays ≤1500 W and thermal budget permits higher RthJA. |
Compared with SMBJ26A-M3/5A and SMCJ26A-M3/H, the SMC5K26A-M3/H delivers 3.3× and 3.3× higher peak pulse power respectively, enabling single-device protection for demanding 24 V automotive and industrial applications without parallel TVS stacking or derating.
Availability
SMC5K26A-M3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial 24 V power distribution, and telecom infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMC5K26A-M3/H 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 power MOSFETs with emphasis on reliability, ruggedness, and automotive qualification.
The SMC5K26A-M3/H belongs to Vishay's TRANSZORB® family of high-power TVS diodes, engineered specifically for industrial and transportation systems needing robust, standardized surge immunity without custom design overhead.
FAQ
What is the maximum clamping voltage of the SMC5K26A-M3/H under a 10/1000 μs surge?
The SMC5K26A-M3/H has a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current of 119 A with a 10/1000 μs waveform. This value is measured per Figure 3 in the Vishay datasheet 87742 and reflects worst-case device behavior at TA = 25 °C. The SMC5K26A-M3/H maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C), with minor derating above 25 °C per Figure 2.
Is the SMC5K26A-M3/H AEC-Q101 qualified?
No, the SMC5K26A-M3/H is not AEC-Q101 qualified. Per Vishay documentation, AEC-Q101 qualification applies only to SMC5K10A through SMC5K20A variants with the HM3 suffix (e.g., SMC5K20AHM3_A/H). The SMC5K26A-M3/H is specified for industrial-grade applications and carries the M3 halogen-free/RoHS-compliant marking but lacks automotive qualification. For AEC-Q101 compliance, engineers must select an HM3-suffixed part within the 10–20 V VWM range.
What does the "-M3/H" suffix indicate in SMC5K26A-M3/H?
The "-M3" suffix denotes halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance, while "/H" specifies packaging in 7-inch plastic tape-and-reel format with 850 units per reel. This ordering code aligns with Vishay's preferred packaging nomenclature in Document 87742 and ensures compatibility with standard SMT pick-and-place equipment using industry-standard carrier tape dimensions.
Can the SMC5K26A-M3/H be used in bidirectional configurations?
No, the SMC5K26A-M3/H is strictly unidirectional, as confirmed by its polarity marking (cathode band), electrical characteristics table (VBR defined only for forward-biased avalanche), and absence of symmetrical breakdown parameters. To protect AC or bipolar signal lines, two SMC5K26A-M3/H devices must be connected in series opposition, or a dedicated bidirectional TVS such as SMBJ26CA-M3/5A should be selected instead.
What is the thermal resistance from junction to ambient (RthJA) for the SMC5K26A-M3/H?
The SMC5K26A-M3/H has a typical junction-to-ambient thermal resistance (RthJA) of 90 °C/W when mounted on a standard FR4 PCB per JEDEC 51-2A guidelines - using a 2 oz. copper footprint matching the recommended pad layout in the datasheet. This value assumes no additional heatsinking; actual RthJA will improve with larger copper pours or thermal vias, and degrade with smaller pads or non-standard board materials.
SMC5K26A-M3/H 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/H FAQ
1.How can I place an order for SMC5K26A-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K26A-M3/H 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/H reliable?
The price and inventory of SMC5K26A-M3/H 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/H is usually 5 days.
3.What payment methods are accepted for SMC5K26A-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K26A-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K26A-M3/H?
SMC5K26A-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K26A-M3/H 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/H?
For technical support, including SMC5K26A-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K26A-M3/H requirements.
6.How does Aetrix verify that SMC5K26A-M3/H is sourced from the original manufacturer or authorized distributors?
All SMC5K26A-M3/H 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/H meets industry standards.
7.What is the process for return or replacement of SMC5K26A-M3/H?
All SMC5K26A-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K26A-M3/H, 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/H part is unused and in its original packaging.
Return procedure for SMC5K26A-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K26A-M3/H Tags
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