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Vishay General Semiconductor - Diodes Division SMCJ26A-M3/57T
- Part No.:
- SMCJ26A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26A-M3/57T.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,507
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Product details
Overview
SMCJ26A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed to protect sensitive electronics against ESD, lightning-induced surges, and inductive switching transients. It features a 26 V standoff voltage (VWM), 28.9–31.9 V breakdown voltage (VBR at 1 mA), 42.1 V clamping voltage (VC) at 35.6 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform.
For engineers reviewing the SMCJ26A-M3/57T datasheet, SMCJ26A-M3/57T pinout, SMCJ26A-M3/57T application, or SMCJ26A-M3/57T equivalent, key selection criteria include unidirectional polarity, halogen-free RoHS-compliant construction (M3 suffix), 1500 W surge capability, junction temperature range of –55 °C to +150 °C, and compatibility with automated SMT placement on standard PCB copper pads.
Technical Context
The SMCJ26A-M3/57T operates as a clamping-type TVS diode: under normal conditions it presents high impedance (<1 µA leakage at 26 V), then rapidly avalanches below its breakdown threshold to limit transient voltages. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling consistent clamping performance across repeated 10/1000 µs surges.
Thermally, it exhibits RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), supporting reliable operation up to TJ = 150 °C when mounted per recommended 8.0 mm × 8.0 mm copper pad layout. The M3 suffix confirms halogen-free, RoHS-compliant materials meeting JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1 reflow profile (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - Confirmed avalanche onset range for design margining |
| VC @ IPPM | 42.1 V at 35.6 A - Clamped voltage during full 1500 W transient, defining protected circuit stress |
| PPPM | 1500 W - Peak surge power handling with standardized 10/1000 µs waveform |
| IFSM | 200 A - Single half-sine surge rating (8.3 ms), critical for inductive load switching protection |
| TJ Range | –55 °C to +150 °C - Full industrial/automotive ambient operation without derating |
| Package | SMC (DO-214AB) - Standardized 7.11 mm × 6.22 mm footprint compatible with automated pick-and-place |
Pinout & Package
SMCJ26A-M3/57T uses the SMC (DO-214AB) surface-mount package: 7.11 mm × 6.22 mm body, 2.62 mm height, matte tin-plated leads solderable per J-STD-002, with cathode band marking on the unidirectional device.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection | Connected to ground or low-impedance return path during clamping |
| Cathode | High-side connection | Marked by band; connects to protected line-avalanche conduction occurs anode-to-cathode |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges on 24 V industrial lines |
| 42.1 V clamping at 35.6 A | Limits transient overvoltage to safe levels for 3.3 V/5 V/24 V logic and MOSFET gate drivers |
| Halogen-free, RoHS-compliant (M3) | Meets automotive and green electronics requirements without compromising surge performance |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free assembly without moisture-related popcorning |
| –55 °C to +150 °C operation | Validated for under-hood automotive, outdoor telecom, and industrial motor control environments |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 24 V DC input rails against back-EMF from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Unidirectional TVS placed between rail and ground to clamp inductive kickback spikes. Use Value: Limits transient voltage to ≤42.1 V, preventing damage to upstream DC/DC converters and microcontrollers. | Use Scenario: Guarding LIN bus transceivers and sensor supply lines in door modules and seat controllers. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing ISO 7637-2 pulse 1 (inductive switch-off) and pulse 2a (load dump). Use Value: Maintains signal integrity by suppressing >100 V transients to <43 V within nanoseconds, preserving communication reliability. |
| Telecom Power Feeds | Consumer Appliance Control Boards |
Use Scenario: Input-stage surge protection on 48 V PoE-powered remote radio units and base station interfaces. IC Role / Device Role / Timing Role: Primary clamping device on DC input, coordinated with upstream fuses and secondary filtering. Use Value: Absorbs 1500 W surges without degradation, ensuring uptime in lightning-prone outdoor deployments. | Use Scenario: Overvoltage safeguard for microcontroller I/O pins and relay driver outputs in washing machines and HVAC systems. IC Role / Device Role / Timing Role: Localized TVS on each high-risk node-e.g., front-panel buttons, motor feedback lines. Use Value: Prevents field failures caused by user-induced ESD or internal wiring faults, reducing warranty returns. |
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-M3/57T | Lower PPPM (600 W), smaller SMB package (3.56 mm × 2.34 mm), same VWM/VC specs | Better suited for space-constrained consumer PCBs where 600 W surge margin suffices | Select when board area is critical and surge threat level is moderate (IEC 61000-4-2 ±8 kV, not Level 4) |
| SMCJ26CA-M3/57T | Bidirectional variant; identical VWM, VBR, VC, and PPPM, but symmetric clamping in both polarities | Required for AC-coupled lines, differential buses (e.g., RS-485), or unknown signal polarity paths | Choose only if bidirectional protection is mandated-unidirectional SMCJ26A-M3/57T offers lower cost and simpler layout |
Compared with SMBJ26A-M3/57T, the SMCJ26A-M3/57T delivers 2.5× higher surge power in a larger but thermally superior package; versus SMCJ26CA-M3/57T, it provides optimized cost and layout simplicity for DC-biased protection where polarity is known and fixed.
Availability
SMCJ26A-M3/57T is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and consumer appliance control boards requiring stable component supply and long-term production continuity.
Supply support for SMCJ26A-M3/57T 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 automotive-grade qualification.
The SMCJ series was engineered for high-energy transient suppression in harsh environments-targeting industrial automation, automotive subsystems, and infrastructure equipment where failure resilience is non-negotiable.
FAQ
What is the clamping voltage of the SMCJ26A-M3/57T under maximum rated surge current?
The SMCJ26A-M3/57T has a maximum clamping voltage (VC) of 42.1 V at its peak pulse current (IPPM) of 35.6 A, measured with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuits during worst-case transients and is confirmed in Vishay's official datasheet revision 09-Jan-2024 (Document Number: 88394). Designers use this parameter to verify that downstream components remain within absolute maximum ratings.
Does the SMCJ26A-M3/57T meet automotive qualification standards?
The SMCJ26A-M3/57T itself is not AEC-Q101 qualified; it carries the commercial-grade M3 suffix (halogen-free, RoHS-compliant). For automotive applications, Vishay offers the SMCJ26A-HM3_X variant, which adds AEC-Q101 qualification. Engineers deploying the SMCJ26A-M3/57T in automotive contexts must perform system-level validation per OEM requirements, as the base SMCJ26A-M3/57T is intended for industrial and commercial use.
How does the SMCJ26A-M3/57T differ from the SMCJ26CA-M3/57T?
The SMCJ26A-M3/57T is unidirectional, with polarity marked by a cathode band and clamping action only during reverse overvoltage events. The SMCJ26CA-M3/57T is bidirectional, offering symmetrical clamping for AC signals or undefined polarity paths. Both share identical VWM (26 V), VBR, VC, and PPPM (1500 W), but the unidirectional SMCJ26A-M3/57T is preferred for DC rail protection due to lower cost and simplified layout.
What is the thermal resistance of the SMCJ26A-M3/57T, and how does it affect PCB layout?
The SMCJ26A-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W when mounted on the recommended 8.0 mm × 8.0 mm copper pads per terminal. To maintain TJ ≤ 150 °C under sustained 6.5 W power dissipation, designers must allocate sufficient copper area and avoid thermal bottlenecks-smaller pads increase RθJA and risk premature thermal shutdown during repetitive surges.
Can the SMCJ26A-M3/57T be used in place of a 24 V Zener diode for overvoltage protection?
No-the SMCJ26A-M3/57T is not a replacement for a Zener diode in regulation applications. It is a transient suppressor optimized for short-duration, high-energy events (e.g., ESD, lightning), not continuous voltage regulation. Its 26 V standoff (VWM) allows normal operation up to that level, but it does not regulate; once triggered, it clamps and dissipates energy, then resets. For steady-state voltage control, a dedicated Zener or LDO remains necessary alongside the SMCJ26A-M3/57T.
SMCJ26A-M3/57T 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):
- 35.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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)
SMCJ26A-M3/57T FAQ
1.How can I place an order for SMCJ26A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26A-M3/57T 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 SMCJ26A-M3/57T reliable?
The price and inventory of SMCJ26A-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26A-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ26A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26A-M3/57T?
SMCJ26A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26A-M3/57T 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 SMCJ26A-M3/57T?
For technical support, including SMCJ26A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26A-M3/57T requirements.
6.How does Aetrix verify that SMCJ26A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ26A-M3/57T 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 SMCJ26A-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ26A-M3/57T?
All SMCJ26A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26A-M3/57T, 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 SMCJ26A-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ26A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ26A-M3/57T Tags
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