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Vishay General Semiconductor - Diodes Division SMCJ26CA-M3/57T
- Part No.:
- SMCJ26CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26CA-M3/57T.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,811
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Product details
Overview
SMCJ26CA-M3/57T from Vishay General Semiconductor is a bidirectional 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 standoff voltage (VWM), 42.1 V maximum clamping voltage (VC) at 35.6 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 µs waveform), commonly deployed in automotive power rail and industrial sensor interface protection.
For engineers reviewing the SMCJ26CA-M3/57T datasheet, SMCJ26CA-M3/57T pinout, SMCJ26CA-M3/57T application, or SMCJ26CA-M3/57T equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, MSL Level 1 reflow compatibility, halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification readiness via HM3 variant.
Technical Context
This device operates as a voltage-clamped shunt protector with symmetrical breakdown in both polarities (VBR min/max = 28.9 V / 31.9 V at IT = 1.0 mA), enabling robust suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), critical for safeguarding MOSFET gates and microcontroller I/O against ESD and load dump.
Thermal performance is defined by RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), supporting reliable operation up to TJ = +150 °C. The SMC package's 8.0 mm × 8.0 mm copper pad layout requirement ensures specified PPPM derating above 25 °C per Figure 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below system rail. |
| VBR (min/max) | 28.9 V / 31.9 V at 1.0 mA - Bidirectional breakdown threshold range; ensures consistent clamping onset across polarity and unit variation. |
| VC @ IPPM | 42.1 V at 35.6 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling capability; enables survival of high-energy transients like ISO 7637-2 Pulse 5a (load dump). |
| IPPM | 35.6 A - Corresponding peak surge current at VC; used with PCB trace impedance to estimate actual clamping level under real layout conditions. |
| TJ max | +150 °C - Maximum junction temperature; supports under-hood automotive and high-ambient industrial environments. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 8.13 mm footprint and 2.06 mm height; compatible with automated pick-and-place and J-STD-020 MSL Level 1 reflow. |
Pinout & Package
SMCJ26CA-M3/57T uses the standard SMC (DO-214AB) package: two-terminal, bidirectional device with no polarity marking. Terminals are matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode/anode designation does not apply.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Common connection point for transient energy shunting; symmetric conduction eliminates orientation dependency during placement. |
| Terminal 2 | Anode/Cathode (bidirectional) | Second terminal completing the bidirectional clamp path; requires equal copper pad area (8.0 mm × 8.0 mm) per terminal per datasheet Fig. 2 layout recommendation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN bus, RS-485) without external polarity management. |
| 1500 W peak pulse power | Withstands ISO 7637-2 Pulse 5a (load dump) surges up to 120 V/500 ms on 12 V systems when properly heatsinked. |
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance requirements for automotive and industrial OEMs without compromising surge robustness. |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without preconditioning-eliminates moisture sensitivity handling overhead. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage exposure to protected ICs; improves margin versus 3.3 V or 5 V logic supply rails. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump transients (ISO 7637-2 Pulse 5a) and jump-start spikes. IC Role / Device Role / Timing Role: Shunt-type transient voltage suppressor placed directly across input terminals upstream of DC/DC converter. Use Value: Limits voltage to ≤42.1 V during 35.6 A surge, preventing damage to 40 V-rated input MOSFETs and LDO regulators. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA transmitter) from field-induced lightning surges in factory automation. IC Role / Device Role / Timing Role: Bidirectional TVS mounted differential across signal pair to clamp common-mode and differential transients. Use Value: Symmetric 28.9–31.9 V breakdown ensures equal clamping on both signal polarities, preserving analog accuracy during surge events. |
| Telecom Line Card Surge Suppression | Consumer USB Port ESD Protection |
|
Use Scenario: Front-end protection of DSL or PoE-powered line cards exposed to induced surges on twisted-pair telecom cabling. IC Role / Device Role / Timing Role: Primary shunt protector on DC bias feed line, coordinated with secondary GDT or polymer PTC. Use Value: 1500 W rating handles combination wave (10/700 µs) surges per ITU-T K.21; low VC avoids latch-up in powered Ethernet PHYs. |
Use Scenario: Secondary-level ESD protection on USB 2.0 VBUS and D+/D− lines in portable electronics. IC Role / Device Role / Timing Role: Fast-response clamping device placed after primary fuse/PTC, before USB controller ESD diodes. Use Value: Sub-1 ns response time diverts >8 kV HBM ESD pulses before internal silicon reaches failure threshold, extending product lifecycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26CA-E3/57T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher VC (47.1 V @ 8.5 A) | Suitable for space-constrained consumer ports but insufficient for automotive load dump. | Select when board area is critical and surge energy is limited to IEC 61000-4-5 Level 2. |
| SMCJ26A-M3/57T | Unidirectional version; same VWM, VBR, VC, PPPM, but asymmetric conduction (cathode band marked) | Required only where DC-biased lines need polarity-specific clamping (e.g., single-supply op-amp inputs). | Choose only if circuit topology mandates unidirectional behavior; otherwise SMCJ26CA-M3/57T offers broader flexibility. |
Compared with SMAJ26CA-E3/57T, SMCJ26CA-M3/57T delivers 275 % higher surge power handling and lower clamping voltage, making it suitable for harsher environments; versus SMCJ26A-M3/57T, its bidirectional symmetry eliminates orientation risk and simplifies layout for AC or floating nodes.
Availability
SMCJ26CA-M3/57T is available at Aetrix Electronics and suitable for automotive control units, industrial PLC I/O modules, telecom line cards, and consumer power adapter designs requiring stable component supply with halogen-free compliance and MSL Level 1 reflow support.
Supply support for SMCJ26CA-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, thermal performance, and automotive qualification.
The SMCJ series targets high-energy transient suppression in demanding environments, with design focus on automotive-grade robustness, low clamping ratios, and seamless integration into automated SMT production lines.
FAQ
What is the maximum clamping voltage of the SMCJ26CA-M3/57T under a 10/1000 µs surge?
The SMCJ26CA-M3/57T exhibits a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current of 35.6 A under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SMCJ26CA-M3/57T maintains this clamping performance bidirectionally, ensuring consistent protection regardless of transient polarity.
Is the SMCJ26CA-M3/57T suitable for automotive applications?
Yes, the SMCJ26CA-M3/57T is qualified to AEC-Q101 when ordered with the HM3 suffix (e.g., SMCJ26CAHM3_A/H); the M3 suffix indicates halogen-free RoHS compliance and commercial-grade qualification. Its 1500 W surge rating, 150 °C junction rating, and MSL Level 1 reflow compatibility make the SMCJ26CA-M3/57T appropriate for under-hood and body-control module applications-provided final qualification testing aligns with vehicle OEM requirements. The SMCJ26CA-M3/57T itself is not AEC-Q101 certified, but serves as the base platform for that qualification.
How does the bidirectional nature of the SMCJ26CA-M3/57T affect PCB layout?
The SMCJ26CA-M3/57T has no polarity marking and conducts identically in both directions, eliminating orientation constraints during placement. PCB layout must provide symmetric 8.0 mm × 8.0 mm copper pads per terminal (per datasheet Figure 2) to ensure specified thermal dissipation and surge current handling. Unlike unidirectional variants, the SMCJ26CA-M3/57T avoids risk of incorrect installation and simplifies routing for differential or AC-coupled signals-key for interfaces like CAN FD or RS-422 where the SMCJ26CA-M3/57T is frequently applied.
What is the standoff voltage (VWM) of the SMCJ26CA-M3/57T, and why is it important?
The standoff voltage (VWM) of the SMCJ26CA-M3/57T is 26 V-this is the maximum continuous reverse voltage the device can withstand without entering avalanche conduction. It establishes the design margin between normal operating voltage and clamping onset; for example, it allows safe use on nominal 24 V industrial systems with transient headroom. Exceeding VWM risks premature leakage or thermal runaway, so the SMCJ26CA-M3/57T must be selected such that system steady-state voltage remains ≤26 V, with allowance for ripple and tolerance.
Does the SMCJ26CA-M3/57T require a heatsink for standard operation?
No external heatsink is required for the SMCJ26CA-M3/57T under typical single-event surge conditions, as its thermal design relies on PCB copper pads (8.0 mm × 8.0 mm per terminal) acting as integral heat spreaders. The device's RθJA of 75 °C/W assumes this minimum pad layout; reducing pad area increases junction temperature rise and may derate PPPM. For repetitive surge applications or high ambient temperatures (>85 °C), thermal simulation using the SMCJ26CA-M3/57T's RθJL = 15 °C/W is recommended to verify sustained reliability.
SMCJ26CA-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMCJ26CA-M3/57T FAQ
1.How can I place an order for SMCJ26CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26CA-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 SMCJ26CA-M3/57T reliable?
The price and inventory of SMCJ26CA-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 SMCJ26CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ26CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26CA-M3/57T?
SMCJ26CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26CA-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 SMCJ26CA-M3/57T?
For technical support, including SMCJ26CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26CA-M3/57T requirements.
6.How does Aetrix verify that SMCJ26CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ26CA-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 SMCJ26CA-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ26CA-M3/57T?
All SMCJ26CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26CA-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 SMCJ26CA-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ26CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ26CA-M3/57T Tags
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