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Vishay General Semiconductor - Diodes Division SMCJ26CAHE3_A/H
- Part No.:
- SMCJ26CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26CAHE3_A/H.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:528
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Product details
Overview
SMCJ26CAHE3_A/H 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 (PPPM) with 10/1000 μs waveform - deployed across automotive sensor signal lines, industrial I/O ports, and DC power rails.
For engineers reviewing the SMCJ26CAHE3_A/H datasheet, SMCJ26CAHE3_A/H pinout, SMCJ26CAHE3_A/H application, or SMCJ26CAHE3_A/H equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, low thermal resistance (RθJL = 15 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche breakdown mechanism to shunt surge energy away from downstream circuitry. Its bidirectional structure ensures symmetrical clamping in both polarities, eliminating polarity dependency in AC-coupled or floating signal paths.
Designed for high-energy transient immunity, it meets IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive load dump) requirements when applied with proper PCB layout. The glass-passivated junction and MSL Level 1 rating support reflow compatibility up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin for 24 V nominal systems. |
| VBR min/max | 28.9 V / 31.9 V at IT = 1.0 mA - Verified breakdown threshold range ensures consistent turn-on behavior across production lots. |
| VC @ IPPM | 42.1 V at 35.6 A - Clamping voltage under full 1500 W surge; limits stress on protected ICs to safe levels during worst-case transients. |
| PPPM | 1500 W - Peak pulse power handling with 10/1000 μs waveform; supports high-energy surges common in automotive and industrial environments. |
| TJ max | +150 °C - Maximum junction temperature rating enables reliable operation in under-hood or enclosed industrial enclosures. |
| RθJL | 15 °C/W - Low junction-to-lead thermal resistance allows efficient heat transfer to PCB copper, critical for repetitive surge duty cycles. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical avalanche junction; accepts reverse surge current during negative transients. |
| Cathode | Transient current entry (positive polarity) | Other terminal of symmetrical junction; accepts reverse surge current during positive transients - functionally identical to Anode in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC performance in both directions - eliminates need for polarity-aware layout in differential or AC signal paths. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensors, and body electronics - supports long-term field reliability. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (< 1 ns rise time), improving protection effectiveness for high-speed interfaces. |
| MSL Level 1 rating | Compatible with standard lead-free reflow profiles up to 260 °C peak without moisture sensitivity concerns - simplifies manufacturing. |
| Glass passivated junction | Enhances long-term stability and leakage performance under thermal cycling and humidity exposure - critical for industrial deployments. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to divert surge energy before reaching signal conditioning circuitry. Use Value: Maintains signal integrity under 12 V/24 V system surges up to 1500 W while meeting AEC-Q101 lifetime requirements. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers against induced transients from relay coil switching and motor drive noise. IC Role / Device Role / Timing Role: Primary overvoltage suppression element on 24 V DC input lines, mounted adjacent to terminal block entry points. Use Value: Limits clamped voltage to 42.1 V during 35.6 A surges, preventing latch-up or damage to microcontroller GPIOs and optocouplers. |
| DC Power Rail Protection | Telecom Interface Protection |
Use Scenario: Guarding 24 V or 48 V intermediate distribution rails in industrial power supplies and PoE injectors against lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level TVS placed downstream of primary MOVs or GDTs to handle residual fast transients and improve response speed. Use Value: Delivers sub-45 V clamping at full 1500 W rating, enabling tighter voltage margins for downstream DC-DC converters and LDOs. |
Use Scenario: Shielding RS-485/RS-422 transceiver pins in telecom base station backplanes from ESD and EFT events per IEC 61000-4-2/4-4. IC Role / Device Role / Timing Role: Point-of-entry protection on differential data lines, leveraging bidirectional symmetry to avoid signal inversion issues. Use Value: Provides matched clamping in both polarities with <100 pF junction capacitance (typ.), preserving signal integrity up to 10 Mbps. |
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 | Same VWM (26 V) and VC (42.1 V), but lower PPPM (600 W); smaller SMA package (DO-214AC). | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a load dump simulation. | Select when board space is constrained and surge energy remains below 600 W. |
| SMCJ26AHE3_A/H | Unidirectional variant with identical VWM, VC, and PPPM; includes cathode band marking. | Requires polarity-aware layout; not usable on AC-coupled or floating lines without external biasing. | Choose only for DC-only circuits where unidirectional protection suffices and polarity can be guaranteed. |
Compared with SAC26CA and SMCJ26AHE3_A/H, the SMCJ26CAHE3_A/H uniquely combines 1500 W surge capacity, bidirectional symmetry, and AEC-Q101 qualification - making it the only option suitable for automotive-grade 24 V system protection without layout or reliability compromises.
Availability
SMCJ26CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, DC power rail protection, and telecom interface circuits requiring stable component supply and long-term lifecycle assurance.
Supply support for SMCJ26CAHE3_A/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated.
FAQ
What is the clamping voltage of the SMCJ26CAHE3_A/H under full-rated surge current?
The SMCJ26CAHE3_A/H has a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current of 35.6 A using a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 standards and ensures downstream components see limited overvoltage stress during transient events. The SMCJ26CAHE3_A/H maintains this clamping performance symmetrically in both directions due to its bidirectional construction.
Is the SMCJ26CAHE3_A/H suitable for automotive applications?
Yes, the SMCJ26CAHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix indicating RoHS-compliant and AEC-Q101–qualified construction. It meets requirements for under-hood and chassis-mounted modules exposed to load dump, jump start, and ISO 7637-2 transients. The SMCJ26CAHE3_A/H is commonly deployed in engine control units, ADAS camera modules, and body control modules.
How does the bidirectional design of the SMCJ26CAHE3_A/H affect PCB layout?
The SMCJ26CAHE3_A/H has no polarity marking and delivers identical electrical performance in both directions, allowing placement without orientation constraints on AC-coupled lines, differential buses (e.g., RS-485), or floating sensor outputs. This eliminates risk of incorrect installation and simplifies layout compared to unidirectional TVS diodes like the SMCJ26AHE3_A/H, which require strict cathode alignment. The SMCJ26CAHE3_A/H is ideal for high-mix manufacturing environments.
What is the thermal resistance profile of the SMCJ26CAHE3_A/H?
The SMCJ26CAHE3_A/H exhibits a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W and junction-to-ambient (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads. This low RθJL enables effective heat dissipation into the PCB during repetitive surge events, supporting sustained reliability in industrial controls. The SMCJ26CAHE3_A/H achieves this via its SMC (DO-214AB) package's robust copper strap construction.
Does the SMCJ26CAHE3_A/H meet moisture sensitivity requirements for lead-free reflow?
Yes, the SMCJ26CAHE3_A/H is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and withstands peak reflow temperatures up to 260 °C without baking or special handling. This is enabled by its hermetically sealed epoxy molding compound and glass passivated chip junction. The SMCJ26CAHE3_A/H is fully compatible with standard lead-free assembly processes used in automotive and industrial electronics manufacturing.
SMCJ26CAHE3_A/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:
- -
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ26CAHE3_A/H FAQ
1.How can I place an order for SMCJ26CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26CAHE3_A/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 SMCJ26CAHE3_A/H reliable?
The price and inventory of SMCJ26CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ26CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26CAHE3_A/H?
SMCJ26CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26CAHE3_A/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 SMCJ26CAHE3_A/H?
For technical support, including SMCJ26CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26CAHE3_A/H requirements.
6.How does Aetrix verify that SMCJ26CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ26CAHE3_A/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 SMCJ26CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ26CAHE3_A/H?
All SMCJ26CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26CAHE3_A/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 SMCJ26CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ26CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ26CAHE3_A/H Tags
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