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Vishay General Semiconductor - Diodes Division SMCJ26CAHE3/57T
- Part No.:
- SMCJ26CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26CAHE3/57T.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,546
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Product details
Overview
SMCJ26CAHE3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails 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), making it suitable for automotive power line surge suppression per ISO 7637-2.
For engineers reviewing the SMCJ26CAHE3/57T datasheet, SMCJ26CAHE3/57T pinout, SMCJ26CAHE3/57T application, or SMCJ26CAHE3/57T equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, low incremental surge resistance, and compatibility with automated SMT assembly on 8 mm × 8 mm copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions, it presents high impedance (<1 µA leakage at 26 V); during transients exceeding VBR (28.9–31.9 V), it avalanches rapidly (<1 ns response) to clamp voltage to ≤42.1 V while diverting up to 35.6 A. Its bidirectional structure eliminates polarity concerns in AC-coupled or floating bus applications.
Thermally, it uses a glass-passivated junction with RθJA = 75 °C/W (on recommended pad layout) and TJmax = 150 °C, enabling reliable operation in under-hood automotive environments. The HE3 suffix confirms RoHS-compliance and AEC-Q101 qualification per stress test requirements for automotive electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 24 V automotive systems. |
| VBR min/max | 28.9 V / 31.9 V - Breakdown voltage range at 1 mA test current; ensures consistent avalanche initiation across production lots. |
| VC @ IPPM | 42.1 V - Clamped voltage at 35.6 A peak pulse (10/1000 µs); guarantees downstream ICs see <43 V during ISO 7637-2 Pulse 5a surges. |
| PPPM | 1500 W - Peak pulse power handling capability; supports high-energy transients without thermal runaway. |
| IPPM | 35.6 A - Maximum non-repetitive surge current (10/1000 µs); determines minimum trace width and fuse coordination. |
| TJmax | 150 °C - Maximum junction temperature; enables operation in engine control units and ADAS modules with ambient up to 125 °C. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD testing per AEC specification. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile plastic case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. No polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal 1 | One side of symmetrical PN junction; connects to protected line (e.g., CAN_H or +24 V rail). |
| Cathode | Terminal 2 | Other side of symmetrical PN junction; connects to reference (e.g., CAN_L or chassis ground). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - simplifies layout for AC signals or differential buses like CAN or RS-485. |
| AEC-Q101 qualification | Validated for automotive under-hood use - eliminates need for additional qualification testing in Tier 1 BOMs. |
| Glass passivated junction | Enhanced moisture resistance and long-term stability - critical for 15-year vehicle service life. |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60% RH - compatible with standard SMT reflow without dry-packaging or baking. |
| Low clamping ratio (VC/VBR) | 1.46 typical - minimizes protective voltage overhead, allowing tighter design margins for 3.3 V or 5 V logic interfaces. |
Applications
| Automotive Power Line Protection | CAN Bus Transient Suppression |
|---|---|
|
Use Scenario: Protecting 24 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Shunt TVS diode placed between power rail and chassis ground to clamp surges within 1 ns. Use Value: Limits voltage to ≤42.1 V during 35.6 A transients, preventing damage to MCU power supplies and PMICs rated for 45 V max. |
Use Scenario: Safeguarding high-speed CAN FD transceivers (e.g., TJA1057) from ESD and coupled noise on vehicle wiring harnesses. IC Role / Device Role / Timing Role: Bidirectional clamping element across CAN_H/CAN_L differential pair to suppress common-mode transients. Use Value: Maintains signal integrity by clamping differential spikes without adding capacitance (>100 pF typical at 0 V bias), preserving >5 Mbps data rates. |
| Industrial Sensor Interface Protection | DC-DC Converter Input Stage |
|
Use Scenario: Shielding 4–20 mA current loop sensors in factory automation from induced lightning surges on long field cables. IC Role / Device Role / Timing Role: Primary overvoltage clamp on sensor supply line, coordinated with series current-limiting resistor. Use Value: Absorbs 1500 W pulses without degradation, ensuring sensor accuracy remains unaffected after repeated 1 kV/1.2 µs surges. |
Use Scenario: Guarding input stage of 24 V-to-5 V buck converters in railway signaling equipment exposed to traction system switching noise. IC Role / Device Role / Timing Role: Front-end transient suppressor upstream of input capacitor and controller IC. Use Value: Prevents converter latch-up by limiting input voltage excursions to 42.1 V, enabling stable operation during 100 ms surges. |
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), lower PPPM (1000 W), higher VC (45.7 V), not AEC-Q101 qualified | Targeted at commercial industrial use only; lacks automotive reliability validation | Select when cost sensitivity outweighs automotive qualification requirements and surge energy is ≤1000 W. |
| TPSMD26CA | Same VWM (26 V), identical PPPM (1500 W), slightly higher VC (43.5 V), AEC-Q101 qualified, same SMC package | Drop-in replacement with identical footprint and thermal profile; validated for same automotive stress tests | Choose for second-source assurance where Vishay supply continuity is a concern, with no PCB or thermal redesign needed. |
Compared with SAC26CA, SMCJ26CAHE3/57T delivers higher surge robustness and automotive qualification; versus TPSMD26CA, it offers marginally tighter clamping (42.1 V vs. 43.5 V) and broader manufacturer support history in Tier 1 automotive programs.
Availability
SMCJ26CAHE3/57T is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, CAN bus nodes, and DC-DC converter input stages requiring stable component supply across extended product lifecycles.
Supply support for SMCJ26CAHE3/57T 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMCJ series is engineered specifically for high-energy transient suppression in harsh environments, with emphasis on AEC-Q101 compliance, low clamping ratios, and robust thermal performance in SMC packaging.
FAQ
What is the clamping voltage of SMCJ26CAHE3/57T at its rated peak pulse current?
The SMCJ26CAHE3/57T clamps to a maximum of 42.1 V when subjected to its rated peak pulse current of 35.6 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024, ensuring predictable protection for downstream 45 V-rated components. The SMCJ26CAHE3/57T maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is SMCJ26CAHE3/57T suitable for automotive applications?
Yes, SMCJ26CAHE3/57T is explicitly AEC-Q101 qualified, as indicated by the "HE3" suffix in its part number. It has passed stress tests including high-temperature operating life, temperature cycling, unbiased highly accelerated stress testing, and ESD per AEC-Q101 Rev D. The SMCJ26CAHE3/57T is widely deployed in automotive power distribution modules, body control units, and ADAS domain controllers where ISO 7637-2 compliance is mandatory.
How does the bidirectional nature of SMCJ26CAHE3/57T affect its circuit implementation?
The SMCJ26CAHE3/57T has symmetrical breakdown and clamping characteristics in both directions, eliminating the need for polarity-aware placement. In practice, this allows direct connection across differential lines (e.g., CAN_H/CAN_L) or ungrounded AC-coupled signals without risk of reverse-bias damage. The SMCJ26CAHE3/57T achieves identical VBR (28.9–31.9 V) and VC (42.1 V) regardless of voltage polarity, simplifying schematic capture and reducing BOM variants.
What is the thermal resistance of SMCJ26CAHE3/57T, and how does it impact PCB layout?
The SMCJ26CAHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. To maintain TJ ≤ 150 °C under worst-case 6.5 W steady-state dissipation, designers must ensure adequate copper area and avoid excessive trace length. The SMCJ26CAHE3/57T's RθJL of 15 °C/W further supports heat conduction through leads into inner-layer planes.
Can SMCJ26CAHE3/57T be used in place of a unidirectional TVS like SMCJ26AHE3/57T?
No - SMCJ26CAHE3/57T is strictly bidirectional and lacks cathode/anode polarity marking, whereas SMCJ26AHE3/57T is unidirectional with a defined cathode band. Substituting them requires circuit-level verification: the SMCJ26CAHE3/57T will conduct in both directions above VBR, potentially disrupting DC bias in single-polarity applications. Use SMCJ26CAHE3/57T only where bidirectional clamping is functionally required, such as on floating buses or AC signals.
SMCJ26CAHE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
SMCJ26CAHE3/57T FAQ
1.How can I place an order for SMCJ26CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26CAHE3/57T 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 SMCJ26CAHE3/57T reliable?
The price and inventory of SMCJ26CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ26CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26CAHE3/57T?
SMCJ26CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26CAHE3/57T 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 SMCJ26CAHE3/57T?
For technical support, including SMCJ26CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26CAHE3/57T requirements.
6.How does Aetrix verify that SMCJ26CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ26CAHE3/57T 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 SMCJ26CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ26CAHE3/57T?
All SMCJ26CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26CAHE3/57T, 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 SMCJ26CAHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ26CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ26CAHE3/57T Tags
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