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Vishay General Semiconductor - Diodes Division SMCJ26CA-M3/9AT
- Part No.:
- SMCJ26CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26CA-M3/9AT.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,860
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Product details
Overview
SMCJ26CA-M3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. 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 on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMCJ26CA-M3/9AT datasheet, SMCJ26CA-M3/9AT pinout, SMCJ26CA-M3/9AT application, or SMCJ26CA-M3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, AEC-Q101 qualification eligibility (via HM3 suffix), and compatibility with automated SMT assembly on 8 mm × 8 mm copper pads.
Technical Context
The SMCJ26CA-M3/9AT operates as a silicon avalanche diode with glass-passivated junction, delivering symmetrical clamping in both polarities due to its bidirectional construction. Its breakdown voltage range is 28.9–31.9 V at 1 mA test current, with temperature coefficient of VBR at +0.097 %/°C - enabling predictable voltage tolerance across automotive-grade operating temperatures (−55 °C to +150 °C).
It meets J-STD-020 MSL Level 1 moisture sensitivity, supports 260 °C lead-free reflow, and exhibits low thermal resistance (RθJL = 15 °C/W) for effective surge energy dissipation. The device is halogen-free and RoHS-compliant per M3 suffix, with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 26 V - maximum continuous reverse voltage before clamping initiates; defines safe operating margin below breakdown |
| VBR (Breakdown Voltage) | 28.9–31.9 V at 1 mA - ensures reliable avalanche conduction onset within tight tolerance band |
| VC (Clamping Voltage) | 42.1 V at 35.6 A (10/1000 µs) - limits transient-induced stress on downstream ICs during ESD or load dump events |
| PPPM (Peak Pulse Power) | 1500 W - sustains high-energy transients without failure when mounted on recommended 8 mm × 8 mm copper pads |
| IPPM (Peak Pulse Current) | 35.6 A - quantifies maximum surge current handled under standardized 10/1000 µs waveform |
| TJ Range | −55 °C to +150 °C - supports operation in under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height for high-power density layout |
Pinout & Package
SMCJ26CA-M3/9AT uses the SMC (DO-214AB) package: a two-terminal, non-polarized surface-mount case with no polarity marking for bidirectional devices. Terminals are matte tin-plated leads compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides symmetrical conduction path for positive and negative surges; no cathode band marking |
| Cathode | Transient return path (bidirectional) | Electrically identical to anode in CA-type devices; terminals interchangeable in PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 1500 W peak pulse rating | Handles ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surge events in automotive and industrial systems |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in protected MOSFETs/ICs |
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance requirements for global OEM supply chains without compromising surge performance |
| MSL Level 1 rating | Allows unlimited floor life and direct placement into reflow ovens without baking, streamlining high-volume SMT production |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus power inputs in body control modules against load dump transients up to 120 V. IC Role / Device Role / Timing Role: Bidirectional TVS clamp limiting rail voltage to ≤42.1 V during 35.6 A surge events. Use Value: Prevents permanent damage to CAN transceivers and microcontrollers by suppressing ISO 16750-2 load dump spikes without requiring series impedance. | Use Scenario: Safeguarding analog output lines (4–20 mA) of pressure sensors exposed to ESD and inductive switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) voltage clamp shunting transient energy away from precision DAC and op-amp circuitry. Use Value: Maintains signal integrity and measurement accuracy by holding clamped voltage below 42.1 V while preserving low leakage (<1 µA at 26 V). |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Front-end protection of PoE-powered Ethernet line cards against lightning-induced surges on DC bias lines. IC Role / Device Role / Timing Role: Primary bidirectional surge suppressor absorbing up to 1500 W per IEEE C62.41.2 Category B/C threats. Use Value: Enables compact, cost-effective protection architecture with no need for additional series components or polarity management. | Use Scenario: Secondary-side overvoltage suppression on 24 V DC outputs of wall-mounted USB-C PD adapters. IC Role / Device Role / Timing Role: Fail-safe clamp preventing output overvoltage propagation during regulator fault conditions. Use Value: Complies with UL 62368-1 transient immunity requirements while maintaining <1 µA reverse leakage at rated 26 V output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC26CA | Lower peak power (600 W), smaller SMA package, higher VC (47 V) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a | Select only for space-constrained consumer designs with <600 W surge exposure |
| 1.5KE27CA | Through-hole DO-201 package, same VWM/VC, but slower response and higher Rsurge | Requires PCB real estate and wave-solder process; not suitable for high-density SMT layouts | Prefer only for legacy through-hole systems or prototyping where reflow compatibility is not required |
Compared with SAC26CA and 1.5KE27CA, the SMCJ26CA-M3/9AT delivers superior surge handling (1500 W vs. 600 W/1500 W), optimized SMT manufacturability, and tighter clamping (42.1 V vs. 47 V/45 V), making it the preferred choice for automotive and industrial applications demanding AEC-Q101-aligned reliability and high-power transient immunity.
Availability
SMCJ26CA-M3/9AT is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, telecom line card surge hardening, and consumer power adapter safety compliance requiring stable component supply and traceable sourcing.
Supply support for SMCJ26CA-M3/9AT 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 high-reliability diodes, rectifiers, and protection devices for demanding industrial and automotive applications.
The SMCJ series was developed specifically for high-power transient suppression in harsh environments, emphasizing low clamping ratio, repeatable surge endurance, and AEC-Q101 qualification readiness for automotive electronics.
FAQ
What is the clamping voltage of SMCJ26CA-M3/9AT at its rated peak pulse current?
The SMCJ26CA-M3/9AT has a maximum clamping voltage (VC) of 42.1 V at 35.6 A peak pulse current under the standardized 10/1000 µs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per JEDEC guidelines, ensuring realistic thermal and electrical performance in production PCB layouts. The SMCJ26CA-M3/9AT maintains this clamping performance across its full operating temperature range.
Is SMCJ26CA-M3/9AT qualified to AEC-Q101?
The SMCJ26CA-M3/9AT itself is not AEC-Q101 qualified; however, the HM3 suffix variant (e.g., SMCJ26CAHM3_A/I) is explicitly rated for AEC-Q101. The M3 suffix denotes halogen-free and RoHS-compliant construction but does not imply automotive qualification. For automotive applications requiring formal qualification, engineers must specify the HM3-based ordering code, not the M3/9AT variant. The SMCJ26CA-M3/9AT remains suitable for industrial and commercial use where AEC-Q101 is not mandated.
How does the bidirectional design of SMCJ26CA-M3/9AT affect PCB layout?
The SMCJ26CA-M3/9AT has no polarity marking - its bidirectional structure means either terminal may connect to line or return, eliminating orientation constraints during placement. This simplifies automated pick-and-place and reduces PCB silkscreen and assembly documentation overhead. Unlike unidirectional TVS diodes, the SMCJ26CA-M3/9AT requires no cathode-band alignment check, and its symmetric VBR and VC ensure identical protection behavior regardless of surge polarity. Layout follows standard SMC pad dimensions (0.305" × 0.220") per Vishay's recommended footprint.
What is the maximum reverse leakage current of SMCJ26CA-M3/9AT at its standoff voltage?
The SMCJ26CA-M3/9AT exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 26 V standoff voltage (VWM) and 25 °C ambient temperature. This ultra-low leakage preserves system efficiency in always-on circuits and avoids false triggering in high-impedance sensor bias networks. Leakage remains below 10 µA up to 125 °C, supporting stable operation in thermally stressed environments without degrading protected circuit functionality. The SMCJ26CA-M3/9AT achieves this while maintaining full 1500 W surge capability.
Can SMCJ26CA-M3/9AT be used in parallel for higher surge current handling?
No - the SMCJ26CA-M3/9AT is not designed for parallel operation. Variations in breakdown voltage (28.9–31.9 V) and dynamic impedance cause uneven current sharing during transients, risking thermal runaway in one device. Vishay specifies single-device usage only. For higher surge ratings, select a higher-power TVS (e.g., SMCJ33CA) or implement staged protection with upstream current-limiting resistors and downstream low-capacitance clamps. The SMCJ26CA-M3/9AT must be applied as a standalone, properly derated component per Figure 2 in its datasheet.
SMCJ26CA-M3/9AT 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-M3/9AT FAQ
1.How can I place an order for SMCJ26CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26CA-M3/9AT 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-M3/9AT reliable?
The price and inventory of SMCJ26CA-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ26CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26CA-M3/9AT?
SMCJ26CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26CA-M3/9AT 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-M3/9AT?
For technical support, including SMCJ26CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26CA-M3/9AT requirements.
6.How does Aetrix verify that SMCJ26CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ26CA-M3/9AT 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-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ26CA-M3/9AT?
All SMCJ26CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26CA-M3/9AT, 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-M3/9AT part is unused and in its original packaging.
Return procedure for SMCJ26CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ26CA-M3/9AT Tags
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