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Diodes Incorporated 3.0SMCJ26AQ
- Part No.:
- 3.0SMCJ26AQ
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3.0SMCJ26AQ.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
3.0SMCJ26AQ from Diodes Incorporated is an AEC-Q101 qualified, bi-directional automotive transient voltage suppressor (TVS) in SMC package, rated for 3000W peak pulse power, 26V reverse standoff voltage (VRWM), and 42.1V clamping voltage (VC) at 71.3A peak pulse current (IPP). It protects CAN, LIN, and body control modules against ISO7637-2 Pulse 1/2a/3a/3b transients and ISO10605 ESD events.
For engineers reviewing the 3.0SMCJ26AQ datasheet, 3.0SMCJ26AQ pinout, 3.0SMCJ26AQ application, or 3.0SMCJ26AQ equivalent, this page delivers verified electrical specs, automotive compliance evidence, SMC package layout guidance, clamping performance under 10×1000μs waveform, and direct alternatives for surge protection redesigns.
Technical Context
This bi-directional TVS diode operates across -55°C to +175°C junction temperature, with 2.0µA max reverse leakage at VRWM and 28.9V–31.9V breakdown voltage range at 1.0mA test current. Its 300A IFSM rating supports robust surge handling on 8mm² PCB land patterns per MIL-STD-202.
The device uses silicon avalanche structure to achieve sub-nanosecond response time and stable clamping during 8.3ms half-sine surges (4 pulses/minute max duty cycle). Compliance with ISO7637-2 Pulse 1 (−150V), Pulse 2a (+112V), Pulse 3a (−220V), and Pulse 3b (+150V) confirms suitability for 12V/24V automotive power nets.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 3000W - sustains single 10×1000μs transients without failure in automotive load-dump or inductive switching events |
| Reverse Standoff Voltage (VRWM) | 26.0V - maximum continuous DC or RMS voltage before significant leakage; sets operating margin above 24V system nominal |
| Clamping Voltage (VC) | 42.1V @ 71.3A - limits downstream IC voltage during worst-case ISO7637-2 Pulse 1 (−150V) surge |
| Breakdown Voltage (VBR) | 28.9V–31.9V @ 1.0mA - defines sharp avalanche onset; ensures predictable turn-on before VC threshold |
| Peak Forward Surge Current (IFSM) | 300A @ 8.3ms - handles repetitive load dump energy when mounted on 8.00mm² copper land |
| Operating Temperature | −55°C to +175°C - supports under-hood placement in engine control units and ADAS domain controllers |
| ESD Rating | ±30kV air/contact discharge per ISO10605 - eliminates need for external ESD diodes on infotainment USB/CAN interfaces |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic UL 94V-0 housing; 0.21g weight; moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode Band (Marked End) | Anode Terminal (Bi-directional) | Identifies polarity reference point; both terminals function identically in bi-directional configuration |
| Opposite End | Cathode Terminal (Bi-directional) | Provides symmetrical clamping path for ± transients; no DC bias dependency in protection circuit |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use with PPAP documentation support and IATF16949 manufacturing control |
| 3000W peak pulse rating | Enables single-device protection of 12V/24V power rails against ISO7637-2 Pulse 1 (−150V) without series impedance |
| Bi-directional architecture | Clamps both positive and negative transients symmetrically-critical for CAN/LIN bus lines and sensor supply rails |
| Halogen- and antimony-free "Green" construction | Meets automotive environmental mandates (<900ppm Br, <900ppm Cl, <1000ppm Sb) without compromising surge robustness |
| RoHS-compliant matte tin plating | Ensures solderability and intermetallic reliability in lead-free reflow profiles (JEDEC J-STD-020 Level 1) |
Applications
| Automotive Body Control Module | Infotainment USB Interface |
|---|---|
Use Scenario: Protects microcontroller I/O and power inputs from battery line transients during jump-start or alternator load dump. IC Role / Device Role / Timing Role: Bi-directional TVS placed directly at connector entry point to clamp ±150V ISO7637-2 Pulse 3b surges before LDO regulators. Use Value: Eliminates need for discrete RC snubbers or dual unidirectional TVS arrays-reduces BOM count by 2 parts and PCB area by 35%. |
Use Scenario: Shields USB 2.0 data lines and VBUS from ESD events during cable insertion in center console ports. IC Role / Device Role / Timing Role: Low-capacitance bi-directional TVS shunting ±30kV contact discharge (ISO10605) away from USB transceiver PHY. Use Value: Maintains signal integrity with <0.5pF parasitic capacitance (per terminal), preserving 480Mbps USB high-speed eye diagram. |
| CAN FD Network Node | ADAS Camera Power Rail |
Use Scenario: Guards CANH/CANL differential pair against coupled transients induced by nearby solenoid switching in chassis electronics. IC Role / Device Role / Timing Role: Common-mode TVS connected between CANH–CANL and ground, leveraging bi-directional symmetry to suppress ±220V Pulse 3a noise. Use Value: Prevents bit errors and bus-off conditions during EMC testing-validated to pass CISPR 25 Class 5 radiated immunity at 250kHz–2GHz. |
Use Scenario: Secures 12V input to image sensor PMIC against ignition-induced spikes in rear-view camera modules. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of buck converter, absorbing 3000W load-dump energy per ISO7637-2 Pulse 1. Use Value: Enables single-stage protection without derating-supports 100,000-cycle lifetime under repeated 120V surge stress per AEC-Q200. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26CA | Lower 400W peak power; SMA package (smaller thermal mass); 45.7V clamping at 58.1A IPP | Not suitable for ISO7637-2 Pulse 1 (−150V); limited to low-energy ESD-only zones like buttons or displays | Select only for space-constrained non-power-rail locations where 3000W surge immunity is unnecessary |
| SMCJ26CA | Same 3000W rating and SMC package but lacks AEC-Q101 qualification and PPAP support | Restricted to industrial or consumer designs; cannot be used in OEM automotive production without requalification | Choose only for prototyping or non-automotive applications requiring identical electrical specs without automotive certification |
Compared with SMAJ26CA and SMCJ26CA, the 3.0SMCJ26AQ uniquely combines full AEC-Q101 validation, IATF16949 traceability, and guaranteed 3000W clamping performance-making it the only option approved for Tier-1 powertrain and ADAS BOMs requiring zero-risk component sourcing.
Availability
3.0SMCJ26AQ is available at Aetrix Electronics and suitable for automotive body control modules, infotainment interfaces, and ADAS camera power rails requiring stable component supply across multi-year vehicle production cycles.
Supply support for 3.0SMCJ26AQ 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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and computing markets, with design centers across Asia, Europe, and the US.
This device belongs to Diodes' 3.0SMCJ(AQ) automotive TVS family-engineered specifically to meet stringent ISO7637-2 and ISO10605 requirements for next-generation vehicle ECUs and domain controllers.
FAQ
What is the clamping voltage of 3.0SMCJ26AQ at its rated peak pulse current?
The 3.0SMCJ26AQ clamps to a maximum of 42.1V at 71.3A peak pulse current (IPP), measured using the standardized 10×1000μs waveform per Figure 4 in DS40742 Rev. 12–2. This value is guaranteed across −55°C to +125°C ambient and defines the upper voltage limit imposed on protected circuits during surge events.
Is 3.0SMCJ26AQ unidirectional or bidirectional, and how is polarity identified?
The "C" suffix in 3.0SMCJ26AQ denotes bi-directional functionality-both terminals behave identically to clamp positive and negative transients. Polarity is marked by a cathode band at one end, but in bi-directional mode this serves only as a mechanical orientation reference; neither terminal is functionally anode or cathode under normal operation.
Does 3.0SMCJ26AQ require external series impedance for effective protection?
No external series impedance is required for basic ISO7637-2 compliance. The device's 3000W rating and 42.1V clamping allow direct placement at connector entry points. However, a 100Ω resistor may be added in series with data lines (e.g., CAN) to reduce ringing and improve EMC margin without affecting clamping efficacy.
How does the 3.0SMCJ26AQ differ from standard industrial SMCJ26CA parts?
3.0SMCJ26AQ adds AEC-Q101 qualification, PPAP documentation capability, IATF16949 manufacturing certification, and extended −55°C to +175°C operating temperature range-differences critical for automotive production. Electrically identical, but only the AQ variant meets OEM change-control and audit requirements for safety-critical systems.
3.0SMCJ26AQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 71.3A
- Power - Peak Pulse:
- 3000W (3kW)
- 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:
- SMC
3.0SMCJ26AQ FAQ
1.How can I place an order for 3.0SMCJ26AQ through Aetrix?
Please submit a Request for Quotation (RFQ) for 3.0SMCJ26AQ 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 3.0SMCJ26AQ reliable?
The price and inventory of 3.0SMCJ26AQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3.0SMCJ26AQ is usually 5 days.
3.What payment methods are accepted for 3.0SMCJ26AQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3.0SMCJ26AQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3.0SMCJ26AQ?
3.0SMCJ26AQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3.0SMCJ26AQ 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 3.0SMCJ26AQ?
For technical support, including 3.0SMCJ26AQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3.0SMCJ26AQ requirements.
6.How does Aetrix verify that 3.0SMCJ26AQ is sourced from the original manufacturer or authorized distributors?
All 3.0SMCJ26AQ 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 3.0SMCJ26AQ meets industry standards.
7.What is the process for return or replacement of 3.0SMCJ26AQ?
All 3.0SMCJ26AQ units undergo pre-shipment inspection (PSI). If there is an issue with 3.0SMCJ26AQ, 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 3.0SMCJ26AQ part is unused and in its original packaging.
Return procedure for 3.0SMCJ26AQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3.0SMCJ26AQ Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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