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Vishay General Semiconductor - Diodes Division SMCJ26CA-E3/9AT
- Part No.:
- SMCJ26CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26CA-E3/9AT.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,875
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Product details
Overview
SMCJ26CA-E3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on power and signal lines. It features 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.
For engineers reviewing the SMCJ26CA-E3/9AT datasheet, SMCJ26CA-E3/9AT pinout, SMCJ26CA-E3/9AT application, or SMCJ26CA-E3/9AT equivalent, this device is selected for robust ESD and surge protection in automotive power rails, industrial sensor interfaces, and telecom DC supply lines where bidirectional clamping and AEC-Q101 qualification are required.
Technical Context
The SMCJ26CA-E3/9AT operates as a bidirectional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its breakdown voltage (VBR) is specified between 28.9 V and 31.9 V at 1.0 mA test current, with temperature coefficient of 0.097 %/°C - enabling stable clamping across -55 °C to +150 °C junction range.
It delivers 1500 W peak pulse power handling under standardized 10/1000 μs waveform, with low incremental surge resistance and fast response time (<1 ns), meeting UL 497B recognition and J-STD-020 MSL Level 1 moisture sensitivity. The device uses glass-passivated junction and matte tin-plated leads compliant with J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse operating voltage before clamping begins; sets safe margin above 24 V nominal systems. |
| VBR min/max | 28.9 V / 31.9 V at 1.0 mA - defines guaranteed avalanche onset window; ensures predictable turn-on across production lot. |
| VC @ IPPM | 42.1 V at 35.6 A - clamping voltage during 10/1000 μs surge; limits protected circuit stress to ≤42.1 V under full-rated transient. |
| PPPM | 1500 W - peak transient energy absorption capability; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge compliance with margin. |
| ID @ VWM | 1.0 μA - ultra-low leakage at standoff voltage; avoids loading sensitive 24 V sensor bias networks or low-power standby circuits. |
| TJ max | +150 °C - extended junction temperature rating enables use in under-hood automotive and high-ambient industrial environments. |
| RθJA | 75 °C/W - thermal resistance to ambient on standard 8 mm × 8 mm copper pads; informs derating above 25 °C ambient. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking. Case meets UL 94 V-0 flammability rating; terminals are matte tin-plated, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Bidirectional avalanche junction | No functional distinction - identical clamping behavior in either direction; eliminates orientation concerns during placement. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN bus) without external polarity management. |
| AEC-Q101 qualified (via HE3/HM3 variants) | Validated for automotive powertrain and chassis applications; SMCJ26CA-E3/9AT shares same die and process as qualified versions. |
| 1500 W peak pulse power | Withstands repeated 10/1000 μs surges up to 35.6 A - exceeds IEC 61000-4-5 open-circuit voltage requirements for 24 V systems. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes voltage overshoot during transients - critical for protecting 3.3 V or 5 V logic downstream of LDOs powered from 24 V rails. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free assembly without pre-baking; simplifies manufacturing integration into high-volume SMT lines. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Protecting 24 V supply inputs of engine control units (ECUs) against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary TVS clamp placed upstream of DC/DC converter input to limit transient voltage to ≤42.1 V. Use Value: Prevents damage to switching regulators and microcontrollers during 12 V/24 V vehicle system transients. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of pressure sensors from ESD and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional shunt protector across sensor output and ground, absorbing ±8 kV contact ESD per IEC 61000-4-2. Use Value: Maintains signal integrity and prevents latch-up in precision ADC front-ends exposed to field wiring noise. |
| Telecom DC Power Input | RS-485 Data Line Protection |
|
Use Scenario: Safeguarding -48 V DC input of base station power modules from lightning-induced surges on outdoor feeder lines. IC Role / Device Role / Timing Role: High-power TVS connected between -48 V rail and chassis ground to divert >1 kA surges. Use Value: Enables compliance with GR-1089-CORE Level 3 surge immunity while maintaining <100 ns response. |
Use Scenario: Protecting differential RS-485 transceivers (e.g., THVD1550) against cable discharge events in factory automation networks. IC Role / Device Role / Timing Role: Bidirectional TVS placed across A/B lines and ground to clamp common-mode and differential transients. Use Value: Eliminates need for separate unidirectional devices per line - reduces BOM count and PCB area by 50%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26CA-E3/61T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W). | Suitable for lower-energy transients or space-constrained layouts where 1500 W margin is not required. | Select when board area is limited and surge threat level is ≤IEC 61000-4-5 Level 2. |
| SMCJ26A-E3/9AT | Unidirectional variant; cathode band marking; identical VWM, VC, and PPPM but asymmetric conduction. | Required only where DC bias polarity is fixed and reverse conduction must be blocked (e.g., 24 V supply to MOSFET gate driver). | Choose only if system architecture mandates unidirectional blocking - otherwise SMCJ26CA-E3/9AT offers broader flexibility. |
Compared with SMAJ26CA-E3/61T, SMCJ26CA-E3/9AT provides 275 % higher surge power handling and better thermal performance; versus SMCJ26A-E3/9AT, it eliminates polarity-dependent layout constraints while delivering identical clamping performance in both directions.
Availability
SMCJ26CA-E3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ26CA-E3/9AT 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 diodes, rectifiers, and protection devices with emphasis on reliability, automotive qualification, and high-power transient suppression.
The SMCJ series was engineered for high-energy surge protection in harsh environments - targeting automotive, industrial, and telecom infrastructure where 1500 W clamping and AEC-Q101 compliance are mandatory design requirements.
FAQ
What is the standoff voltage rating of SMCJ26CA-E3/9AT?
The SMCJ26CA-E3/9AT has a standoff voltage (VWM) of 26 V - the maximum DC or continuous reverse voltage it can block without entering avalanche conduction. This value is verified per ANSI/IEEE C62.35 and ensures compatibility with 24 V nominal systems while maintaining sufficient margin against ripple and tolerance drift.
Is SMCJ26CA-E3/9AT RoHS-compliant and halogen-free?
Yes, SMCJ26CA-E3/9AT carries the "E3" suffix, indicating RoHS-compliance per EU Directive 2011/65/EU. It is not halogen-free; for halogen-free compliance, select the "M3" variant (e.g., SMCJ26CA-M3/9AT), which meets IEC 61249-2-21 requirements.
Does SMCJ26CA-E3/9AT have AEC-Q101 qualification?
The base SMCJ26CA-E3/9AT is commercial-grade and not individually AEC-Q101 qualified. However, it shares identical die, construction, and process with AEC-Q101-qualified variants (e.g., SMCJ26CAHE3_A/I), making it suitable for automotive designs where qualification is required - confirm final part number with Vishay for certified lots.
What is the clamping voltage of SMCJ26CA-E3/9AT at rated surge current?
The SMCJ26CA-E3/9AT clamps to a maximum of 42.1 V when subjected to its rated peak pulse current of 35.6 A (10/1000 μs waveform). This VC value is measured per JEDEC standards and guarantees that protected circuitry sees no more than 42.1 V during full-rated transient events.
Can SMCJ26CA-E3/9AT be used in place of unidirectional SMCJ26A-E3/9AT?
Yes, SMCJ26CA-E3/9AT can replace SMCJ26A-E3/9AT in most applications due to identical VWM, VC, and PPPM ratings - but only where bidirectional clamping is acceptable. Unlike the unidirectional version, it lacks cathode marking and conducts equally in both directions, so verify system polarity tolerance before substitution.
SMCJ26CA-E3/9AT 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 (SMCJ)
SMCJ26CA-E3/9AT FAQ
1.How can I place an order for SMCJ26CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26CA-E3/9AT 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-E3/9AT reliable?
The price and inventory of SMCJ26CA-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ26CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26CA-E3/9AT?
SMCJ26CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26CA-E3/9AT 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-E3/9AT?
For technical support, including SMCJ26CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26CA-E3/9AT requirements.
6.How does Aetrix verify that SMCJ26CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ26CA-E3/9AT 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-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ26CA-E3/9AT?
All SMCJ26CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26CA-E3/9AT, 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-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ26CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ26CA-E3/9AT Tags
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