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Diodes Incorporated SMBJ26AQ-13-F
- Part No.:
- SMBJ26AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26AQ-13-F.pdf
- Description:
- TVS DIODE 26VWM 42.1VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:2,497
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Product details
Overview
SMBJ26AQ-13-F from Diodes Incorporated is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode designed for automotive power-line surge protection. It features a 26V reverse standoff voltage (VRWM), 42.1V maximum clamping voltage at 14.2A peak pulse current, and AEC-Q101 qualification for under-hood and body-control module applications compliant with ISO7637-2 Pulse 1/2a/3a/3b and ISO10605 ESD standards.
For engineers reviewing the SMBJ26AQ-13-F datasheet, SMBJ26AQ-13-F pinout, SMBJ26AQ-13-F application, or SMBJ26AQ-13-F equivalent, this device serves as a primary overvoltage clamp in 12V/24V automotive electrical systems-especially where robustness against load dump, inductive switching transients, and contact/air discharge ESD is required per OEM specifications.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below 26V VRWM, then rapidly avalanches to limit transient voltages to ≤42.1V at 14.2A (10×1000μs waveform). Its 600W peak pulse power rating enables handling of ISO7637-2 Pulse 1 (−150V), Pulse 2a (+112V), and Pulse 3a (−220V) without failure.
Designed for IATF 16949-certified production, it delivers −55°C to +175°C junction operation, 5W steady-state power dissipation at TL = +75°C, and RoHS-compliant, halogen-free packaging in the SMB outline-ensuring compatibility with automated SMT assembly and long-term reliability in harsh automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - sustains single 10×1000μs transients up to 14.2A without thermal runaway |
| Reverse Standoff Voltage (VRWM) | 26.0V - blocks normal 12V/24V system voltages while remaining fully inactive |
| Max Clamping Voltage (VC) | 42.1V @ IPP = 14.2A - limits downstream IC voltage stress during ISO7637-2 Pulse 3a (−220V) |
| Breakdown Voltage (VBR) | 28.9–31.9V @ IT = 1.0mA - ensures precise, repeatable avalanche initiation margin above VRWM |
| Leakage Current (IR) | ≤0.5µA @ VRWM - negligible standby power loss and no signal integrity impact in always-on circuits |
| Operating Temperature | −55°C to +175°C TJ - supports placement near engines, alternators, and battery junction boxes |
Pinout & Package
Package: SMB (Surface-Mount Small Outline), molded plastic, UL 94V-0 rated, 0.1g weight. Cathode band denotes polarity on unidirectional devices; bi-directional variants omit this marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground or low-impedance chassis reference; completes clamping loop during overvoltage events |
| Cathode | Protected line connection | Connected to the 12V/24V supply rail or signal line requiring surge suppression; clamps to anode when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use across temperature, humidity, and mechanical shock profiles per JESD22 |
| ISO7637-2 & ISO10605 compliance | Passes full test suite including Pulse 1 (−150V), Pulse 3a (−220V), and ±30kV contact/air discharge |
| Lead-free, halogen-free "Green" construction | Meets RoHS 3 (2015/863/EU); <900ppm Br, <900ppm Cl, <1000ppm Sb - supports eco-conscious manufacturing |
| SMB package with 3k/reel tape-and-reel | Enables high-speed pick-and-place assembly; moisture sensitivity level 1 (J-STD-020) eliminates bake requirements |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) CAN Bus Protection |
|---|---|
|
Use Scenario: Protects 12V main power input of engine control units exposed to load dump and alternator transients. IC Role / Device Role / Timing Role: Shunt TVS diode placed directly at ECU power entry point, clamping surges before they reach DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤42.1V, preventing latch-up or permanent damage to 3.3V/5V logic rails downstream of the input filter. |
Use Scenario: Safeguards CAN_H/CAN_L lines in body control modules against ESD and coupled power-line noise. IC Role / Device Role / Timing Role: Unidirectional TVS pair (one per line) referenced to chassis ground, suppressing fast transients without distorting differential signaling. Use Value: Maintains CAN signal integrity by clamping ESD spikes within 1ns response time while adding <0.5pF parasitic capacitance. |
| Automotive Lighting Driver Supply | Infotainment System USB Power Rail |
|
Use Scenario: Shields LED driver ICs and MOSFETs in headlamp modules from inductive kickback during PWM dimming. IC Role / Device Role / Timing Role: High-energy TVS mounted across input capacitor, absorbing repetitive 100A/8.3ms surges from relay coil de-energization. Use Value: Withstands ≥1000 pulses at 4.8W/°C derated power, enabling >10-year field life in stop-start cycling conditions. |
Use Scenario: Guards 5V USB VBUS line in infotainment head units against hot-plug transients and ESD from user ports. IC Role / Device Role / Timing Role: Primary clamping device upstream of USB power switch, triggered before internal polyfuse trips. Use Value: Clamps to 42.1V within nanoseconds, limiting energy delivered to downstream USB PD controllers and Type-C port ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26A-13-F | No AEC-Q101 qualification; standard industrial grade only | Not approved for automotive PPAP; limited to non-safety-critical consumer/industrial designs | Select only if AEC-Q101 certification and IATF 16949 traceability are not required |
| SMCJ26A-Q | Larger SMC package (higher 1500W PPK); same VRWM/VC but 2.5× footprint area | Better suited for high-energy load-dump scenarios (>100V transients); less space-efficient for dense PCB layouts | Choose when higher surge margin is needed and board space allows SMC outline |
Compared with SMBJ26A-13-F, SMBJ26AQ-13-F adds mandatory automotive change control, PPAP documentation, and extended temperature validation-making it the sole choice for Tier 1-supplied ECUs. Versus SMCJ26A-Q, it trades peak power headroom for compact SMB mounting and lower parasitic inductance in high-frequency transient suppression.
Availability
SMBJ26AQ-13-F is available at Aetrix Electronics and suitable for automotive ECU power protection, body control module surge hardening, and infotainment USB rail safeguarding requiring stable component supply across multi-year vehicle production cycles.
Supply support for SMBJ26AQ-13-F 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, with design centers in Asia, Europe, and the U.S., and manufacturing in IATF 16949-certified facilities.
This device belongs to Diodes' AQ-series automotive-grade TVS portfolio-engineered specifically to meet OEM-level surge immunity, longevity, and process control requirements for 12V/24V vehicle electrical architectures.
FAQ
What is the difference between SMBJ26AQ-13-F and SMBJ26A-13-F?
The "Q" suffix denotes full AEC-Q101 qualification, PPAP capability, and production in IATF 16949-certified facilities-requirements mandatory for automotive Tier 1 suppliers. SMBJ26A-13-F lacks these certifications and is restricted to industrial or consumer applications where automotive reliability standards do not apply.
Can SMBJ26AQ-13-F be used for bidirectional protection?
No-it is a unidirectional TVS diode with cathode marking and asymmetric breakdown behavior. For bidirectional protection (e.g., data lines like CAN or LIN), the "C" variant SMBJ26CAQ-13-F must be used, which provides symmetrical clamping for both polarities.
What is the maximum allowable ambient temperature for continuous operation?
At TA = +25°C, the device supports 5.0W steady-state dissipation. Derating follows 4.8W/°C above +25°C, meaning maximum ambient temperature for full 5W operation is +25°C. For sustained 5W loads, heatsinking or forced convection is required to maintain junction temperature ≤+175°C.
Does SMBJ26AQ-13-F require a series resistor for ESD protection?
No-its sub-nanosecond response time and low dynamic impedance enable direct placement across protected lines without external current-limiting resistors. However, a small series ferrite bead may be added to reduce RF coupling in sensitive analog or RF sections without affecting clamping performance.
SMBJ26AQ-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AA, SMB
- 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):
- 14.2A
- Power - Peak Pulse:
- 600W
- 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:
- SMB
SMBJ26AQ-13-F FAQ
1.How can I place an order for SMBJ26AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26AQ-13-F 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 SMBJ26AQ-13-F reliable?
The price and inventory of SMBJ26AQ-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ26AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ26AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26AQ-13-F?
SMBJ26AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26AQ-13-F 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 SMBJ26AQ-13-F?
For technical support, including SMBJ26AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26AQ-13-F requirements.
6.How does Aetrix verify that SMBJ26AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ26AQ-13-F 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 SMBJ26AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ26AQ-13-F?
All SMBJ26AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26AQ-13-F, 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 SMBJ26AQ-13-F part is unused and in its original packaging.
Return procedure for SMBJ26AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26AQ-13-F Tags
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Diodes Incorporated
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Diodes Incorporated
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