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Vishay General Semiconductor - Diodes Division SMCJ26CHE3/9AT
- Part No.:
- SMCJ26CHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26CHE3/9AT.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,172
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Product details
Overview
SMCJ26CHE3/9AT from Vishay General Semiconductor is a surface-mount, AEC-Q101-qualified, bi-directional transient voltage suppressor (TVS) in DO-214AB (SMCJ) package. It features 26 V stand-off 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 - designed for robust overvoltage protection of automotive sensor signal lines and power rails.
For engineers reviewing the SMCJ26CHE3/9AT datasheet, SMCJ26CHE3/9AT pinout, SMCJ26CHE3/9AT application, or SMCJ26CHE3/9AT equivalent, key selection criteria include its bi-directional clamping symmetry, AEC-Q101 qualification, 1500 W surge capability, low clamping ratio (VC/VWM = 1.62), and RoHS-compliant HE3 whisker-tested terminations.
Technical Context
The SMCJ26CHE3/9AT operates as a bi-directional avalanche diode, providing symmetrical clamping in both polarities without polarity marking. Its glass-passivated junction enables fast response (<1 ns) to transients and stable breakdown behavior under repetitive surge stress.
Rated for -55 °C to +150 °C operating junction temperature, it delivers 1500 W peak pulse power on standard 8.0 mm × 8.0 mm copper pads and exhibits 75 °C/W junction-to-ambient thermal resistance - enabling reliable operation in under-hood automotive environments without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse stand-off voltage before clamping initiates; defines safe operating margin for 24 V automotive systems. |
| VBR min / max | 28.9 V / 31.9 V - Breakdown occurs within this range at 1 mA test current; ensures consistent turn-on across production lots. |
| VC @ IPPM | 42.1 V - Clamped voltage at 35.6 A peak pulse current; limits downstream IC stress during ISO 7637-2 Pulse 1/2a/5a events. |
| PPPM | 1500 W - Peak pulse power handling with 10/1000 µs waveform; meets stringent automotive load-dump immunity requirements. |
| ID @ VWM | 1.0 µA - Reverse leakage at 26 V; negligible power loss and signal integrity impact in high-impedance sensor interfaces. |
| TJ max | +150 °C - Maximum junction temperature; supports placement near heat sources in engine control units and ADAS modules. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC-Q101 Rev D. |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, bi-directional device with no polarity marking. Matte tin-plated leads meet J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Bi-directional terminals conduct equally in either polarity; no cathode band - simplifies PCB layout and eliminates orientation errors. |
| Case (cathode side in uni-directional variants) | Thermal and mechanical interface | DO-214AB body provides low-inductance path and 15 °C/W junction-to-lead thermal resistance; copper pad layout directly impacts PPPM derating. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, high-temp reverse bias, and mechanical shock per Rev D. |
| 1500 W peak pulse power | Withstands ISO 7637-2 Pulse 5a (load dump up to 60 V, 400 ms) when paired with appropriate series impedance. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V/5 V microcontrollers and CAN transceivers. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements. |
| HE3 suffix | RoHS-compliant, AEC-Q101 qualified, JESD 201 Class 2 whisker-resistant terminations - suitable for long-life automotive deployments. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2a (battery disconnect). IC Role / Device Role / Timing Role: Bi-directional TVS placed at connector entry point to clamp transients before reaching precision ADC front-end. Use Value: 42.1 V clamping ensures downstream 5 V rail and 3.3 V sensor ICs remain below absolute maximum ratings during 100 V/50 ms pulses. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers subjected to field-wiring induced surges and relay coil kickback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DIN-rail mounted I/O module inputs, coordinated with series current-limiting resistor. Use Value: 1500 W rating allows survival of repeated 1 kV/500 A surge events per IEC 61000-4-5 Level 4, extending field service life. |
| Automotive CAN Bus Protection | Power Supply Rail Clamp |
Use Scenario: Secondary protection on high-speed CAN FD data lines (CANH/CANL) in ADAS domain controllers, complementing primary ESD arrays. IC Role / Device Role / Timing Role: Low-capacitance bi-directional clamp absorbing slow-energy transients that bypass fast ESD components. Use Value: Symmetrical clamping preserves differential signal integrity while limiting common-mode overvoltage to <45 V during battery jump-start events. |
Use Scenario: Standoff protection on 24 V auxiliary power rail feeding infotainment head units, guarding against alternator load dump. IC Role / Device Role / Timing Role: Bulk transient suppressor located upstream of DC/DC converters and LDOs to prevent input overvoltage shutdown. Use Value: 26 V VWM aligns with 24 V nominal system; 1500 W rating handles full 60 V/400 ms load dump per ISO 16750-2 without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26AHE3/A | DO-214AC (SMA) package, 400 W PPPM, lower surge capacity, same VWM/VC specs. | Limited to lower-energy transients (e.g., ESD-only); unsuitable for load dump or heavy inductive switching. | Select SMAJ26AHE3/A only when board space is constrained and surge threat level is Class 2 per ISO 16750-2. |
| SMCJ26AHE3/9AT | Uni-directional variant (cathode-banded), identical VWM/VC/PPPM but asymmetric conduction - requires correct polarity placement. | Applicable where unidirectional clamping suffices (e.g., DC power rails with known polarity), not for AC or bidirectional signal lines. | Choose SMCJ26AHE3/9AT only if circuit topology guarantees fixed polarity and layout can enforce orientation. |
Compared with SMCJ26CHE3/9AT, SMAJ26AHE3/A offers smaller footprint but sacrifices 73% peak power handling, while SMCJ26AHE3/9AT demands strict polarity alignment and cannot protect bidirectional signals - making SMCJ26CHE3/9AT the sole choice for robust, orientation-agnostic 24 V system protection.
Availability
SMCJ26CHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, CAN FD bus protection, and 24 V power rail clamping requiring stable component supply across multi-year production cycles.
Supply support for SMCJ26CHE3/9AT 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, MOSFETs, and protection devices with emphasis on automotive, industrial, and computing applications.
The SMCJ series targets high-reliability transient suppression in harsh environments, with design focus on AEC-Q101 compliance, high-power surge resilience, and manufacturability in automated SMT lines.
FAQ
What does the "HE3" suffix indicate in SMCJ26CHE3/9AT?
The HE3 suffix denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker-resistant matte tin plating. Unlike E3-only variants, SMCJ26CHE3/9AT is explicitly validated for automotive under-hood use - including temperature cycling, high-temp reverse bias, and mechanical shock testing per AEC-Q101 Rev D. This makes SMCJ26CHE3/9AT suitable for safety-critical ECUs where long-term reliability is mandatory.
Is SMCJ26CHE3/9AT pin-compatible with uni-directional SMCJ26AHE3/9AT?
No - SMCJ26CHE3/9AT is bi-directional with no polarity marking, while SMCJ26AHE3/9AT is uni-directional and marked with a cathode band. Their electrical behavior differs fundamentally: SMCJ26CHE3/9AT clamps symmetrically in both directions, whereas SMCJ26AHE3/9AT conducts only when anode is negative relative to cathode. PCB layout must reflect this - SMCJ26CHE3/9AT requires no orientation check, but SMCJ26AHE3/9AT demands strict polarity alignment to avoid open-circuit failure.
What is the maximum clamping voltage of SMCJ26CHE3/9AT and how is it measured?
The maximum clamping voltage (VC) of SMCJ26CHE3/9AT is 42.1 V, measured at 35.6 A peak pulse current (IPPM) using a 10/1000 µs double-exponential waveform per ANSI/IEEE C62.35. This value is guaranteed across the full operating temperature range (-55 °C to +150 °C) and represents the upper limit of voltage imposed on protected circuitry during worst-case surge events - critical for ensuring downstream 3.3 V or 5 V ICs remain within absolute maximum ratings.
Can SMCJ26CHE3/9AT be used in 12 V automotive systems?
Yes, SMCJ26CHE3/9AT is commonly deployed in 12 V systems for secondary or high-energy protection - for example, on battery feed lines entering body control modules where load dump transients exceed 30 V. Its 26 V stand-off voltage provides sufficient margin above 12 V nominal while allowing clamping before damaging levels occur. However, for primary 12 V rail protection, lower-VWM devices like SMCJ13AHE3/9AT are typically preferred to minimize leakage and improve responsiveness to lower-amplitude transients.
What is the thermal resistance of SMCJ26CHE3/9AT and how does it affect layout?
SMCJ26CHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal, and 15 °C/W junction-to-lead (RθJL). Layout must replicate this pad area to achieve rated 1500 W pulse power - reducing pad size increases thermal impedance, causing premature thermal runaway during repeated surges. For high-duty-cycle applications, additional thermal vias or internal ground planes are recommended to maintain TJ ≤ 150 °C.
SMCJ26CHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 46.6V
- Current - Peak Pulse (10/1000µs):
- 32.2A
- 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)
SMCJ26CHE3/9AT FAQ
1.How can I place an order for SMCJ26CHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26CHE3/9AT 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 SMCJ26CHE3/9AT reliable?
The price and inventory of SMCJ26CHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26CHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ26CHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26CHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26CHE3/9AT?
SMCJ26CHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26CHE3/9AT 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 SMCJ26CHE3/9AT?
For technical support, including SMCJ26CHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26CHE3/9AT requirements.
6.How does Aetrix verify that SMCJ26CHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ26CHE3/9AT 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 SMCJ26CHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ26CHE3/9AT?
All SMCJ26CHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26CHE3/9AT, 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 SMCJ26CHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ26CHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ26CHE3/9AT Tags
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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