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Vishay General Semiconductor - Diodes Division SMCJ26CA-E3/57T
- Part No.:
- SMCJ26CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26CA-E3/57T.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,244
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Product details
Overview
SMCJ26CA-E3/57T 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 automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the SMCJ26CA-E3/57T datasheet, SMCJ26CA-E3/57T pinout, SMCJ26CA-E3/57T application, or SMCJ26CA-E3/57T equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, AEC-Q101 qualification eligibility, and compatibility with automated SMT placement on 8 mm × 8 mm copper pads.
Technical Context
The SMCJ26CA-E3/57T operates as a silicon avalanche diode with symmetrical breakdown in both polarities, enabling protection against voltage transients regardless of polarity-critical for AC-coupled or floating signal paths. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and repeatable clamping performance across -55 °C to +150 °C operating range.
It delivers fast response time (<1 ps) to ESD and lightning-induced surges, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead), supporting reliable operation under repetitive surge conditions when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR min/max | 28.9 V / 31.9 V - Breakdown voltage range at 1.0 mA test current; ensures consistent turn-on threshold across production lots. |
| VC @ IPPM | 42.1 V - Clamped voltage at 35.6 A peak pulse current; limits downstream IC stress during 10/1000 µs transients. |
| PPPM | 1500 W - Peak pulse power handling (10/1000 µs); supports high-energy surge immunity per ISO 7637-2 and IEC 61000-4-5. |
| IPPM | 35.6 A - Peak pulse current capability; determines minimum series impedance required to limit fault energy into protected circuitry. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments without derating. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with J-STD-020 MSL Level 1 reflow. |
Pinout & Package
SMCJ26CA-E3/57T uses the SMC (DO-214AB) package: a two-terminal, bidirectional surface-mount device with no polarity marking. The case is molded in UL 94 V-0 compliant compound, terminals are matte tin-plated, and the device is designed for soldering per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts reverse surge current during negative transients; symmetrically identical to cathode in bidirectional operation. |
| Cathode | Transient current entry (positive polarity) | Accepts forward surge current during positive transients; electrically interchangeable with anode due to bidirectional construction. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions-enables single-device protection of AC signals, differential buses, or ungrounded interfaces without polarity concerns. |
| AEC-Q101 qualification path | Base P/NHE3 suffix variant available; supports automotive-grade reliability validation including HTOL, TC, and UHAST for engine control and ADAS sensor modules. |
| Low clamping ratio | VC/VWM = 1.62 - Minimizes overvoltage overshoot during surge events, reducing risk of latch-up or gate oxide damage in protected MOSFETs and microcontrollers. |
| Automated placement compatibility | Low-profile SMC package with defined lead coplanarity and J-STD-020-compliant terminations-ensures high-yield pick-and-place and reflow soldering in volume manufacturing. |
| High surge current density | 35.6 A IPPM in 7.75 mm × 6.22 mm footprint-delivers industry-leading power density for space-constrained PCB layouts in industrial PLCs and telecom line cards. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load dump and jump-start induced transients in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry point to clamp ±100 V surges before reaching transceiver input pins. Use Value: Maintains signal integrity by limiting clamped voltage to 42.1 V while absorbing 1500 W pulses-preventing transceiver latch-up and ensuring ASIL-B functional safety compliance. | Use Scenario: Safeguarding analog input channels of programmable logic controllers (PLCs) against field-wiring induced surges in factory automation. IC Role / Device Role / Timing Role: Front-end transient suppressor on 4–20 mA current loop inputs, positioned upstream of precision op-amps and ADCs. Use Value: Enables <1 µA leakage at 26 V VWM to preserve measurement accuracy, while clamping 35.6 A surges within 1 ps to prevent ADC saturation or reference rail disturbance. |
| Telecom Line Card Protection | Consumer Power Adapter ESD Guard |
Use Scenario: Shielding Ethernet PHY interfaces on base station line cards from lightning-induced common-mode surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Common-mode TVS pair (one per differential pair) mounted adjacent to RJ45 magnetics to shunt surge energy to chassis ground. Use Value: Symmetrical 28.9–31.9 V VBR ensures balanced clamping across differential pairs, preserving signal skew and minimizing bit error rate during surge events. | Use Scenario: Adding secondary-level ESD protection on DC output rails of USB-C PD adapters to meet IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact). IC Role / Device Role / Timing Role: Secondary TVS placed after primary OVP and post-filtering stage to absorb residual ESD energy missed by front-end capacitors. Use Value: 42.1 V clamping voltage prevents overvoltage stress on downstream USB-PD controller ICs rated for 28 V absolute maximum, extending product lifetime in harsh user environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC26CA | Lower PPPM (600 W), higher VC (53 V), same VWM and package; not AEC-Q101 qualified. | Suitable for cost-sensitive consumer electronics where 1500 W surge immunity is not required. | Select SAC26CA only if system-level surge testing confirms 600 W rating suffices and automotive qualification is unnecessary. |
| SMCJ26A-E3/57T | Unidirectional version; identical VWM, VBR, VC, and PPPM but marked cathode band; requires correct polarity orientation. | Applicable only in DC-biased circuits with known polarity, such as power supply input rails or unidirectional data lines. | Choose SMCJ26A-E3/57T only when polarity is fixed and board layout allows explicit cathode alignment-avoid in AC or floating signal paths. |
Compared with SAC26CA and SMCJ26A-E3/57T, the SMCJ26CA-E3/57T uniquely provides bidirectional 1500 W surge handling with AEC-Q101 qualification path and lowest clamping ratio (1.62), making it optimal for automotive and industrial applications demanding polarity-agnostic, high-reliability protection.
Availability
SMCJ26CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and telecom line card surge immunity requiring stable component supply and traceable sourcing.
Supply support for SMCJ26CA-E3/57T 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 is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments-including automotive, industrial, and telecom infrastructure-where failure tolerance and long-term stability are critical.
FAQ
What is the clamping voltage of SMCJ26CA-E3/57T at its rated peak pulse current?
The SMCJ26CA-E3/57T has a maximum clamping voltage (VC) of 42.1 V at its rated peak pulse current (IPPM) of 35.6 A, measured under the standard 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range and ensures predictable overvoltage limiting for downstream components in the SMCJ26CA-E3/57T protected circuit.
Is SMCJ26CA-E3/57T suitable for automotive applications?
Yes, the SMCJ26CA-E3/57T is eligible for automotive use: its base ordering code supports AEC-Q101 qualification (via HE3/HM3 suffix variants), and its electrical parameters-including 1500 W peak pulse power, -55 °C to +150 °C operating range, and low leakage-meet requirements for engine control, body electronics, and ADAS sensor protection. The SMCJ26CA-E3/57T itself is RoHS-compliant and MSL Level 1 certified.
How does the bidirectional design of SMCJ26CA-E3/57T affect its PCB layout?
The bidirectional design of SMCJ26CA-E3/57T eliminates polarity marking and orientation constraints-no cathode band or directional placement is required. This simplifies PCB layout for differential signals, AC-coupled interfaces, or floating grounds, and avoids assembly errors. Unlike unidirectional variants such as SMCJ26A-E3/57T, the SMCJ26CA-E3/57T can be placed in either direction without affecting clamping performance.
What is the thermal resistance of SMCJ26CA-E3/57T, and how does it impact power dissipation?
The SMCJ26CA-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W. These values assume mounting on 8.0 mm × 8.0 mm copper pads per terminal. They define safe steady-state power dissipation (6.5 W at TA = 50 °C) and transient thermal response-critical for managing heat buildup during repetitive surge events in enclosed industrial enclosures.
Can SMCJ26CA-E3/57T replace SMCJ26A-E3/57T in an existing design?
SMCJ26CA-E3/57T can replace SMCJ26A-E3/57T only if the circuit is polarity-agnostic (e.g., AC signal lines, differential buses, or floating references). Because SMCJ26CA-E3/57T is bidirectional and lacks polarity marking, it introduces no orientation dependency-but its clamping behavior is identical in both directions. In DC-biased unidirectional applications, the replacement is valid only if the original layout accommodates non-directional placement and system-level testing confirms no degradation in surge margin.
SMCJ26CA-E3/57T 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 (SMCJ)
SMCJ26CA-E3/57T FAQ
1.How can I place an order for SMCJ26CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26CA-E3/57T 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-E3/57T reliable?
The price and inventory of SMCJ26CA-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ26CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26CA-E3/57T?
SMCJ26CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26CA-E3/57T 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-E3/57T?
For technical support, including SMCJ26CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26CA-E3/57T requirements.
6.How does Aetrix verify that SMCJ26CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ26CA-E3/57T 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-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ26CA-E3/57T?
All SMCJ26CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26CA-E3/57T, 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-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ26CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ26CA-E3/57T Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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