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Diodes Incorporated SMAJ26AQ-13-F
- Part No.:
- SMAJ26AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ26AQ-13-F.pdf
- Description:
- TVS DIODE 26VWM 42.1VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:7,466
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Product details
Overview
SMAJ26AQ-13-F from Diodes Incorporated is a unidirectional 400W automotive transient voltage suppressor (TVS) diode with 26V reverse standoff voltage, 42.1V max clamping voltage at 9.5A peak pulse current, and AEC-Q101 qualification. It protects CAN bus, LIN, and body control module power rails against ISO7637-2 Pulse 1 (−100V), Pulse 2a (+50V), and ISO10605 ESD (±30kV) surges in passenger vehicle ECUs.
For engineers reviewing the SMAJ26AQ-13-F datasheet, SMAJ26AQ-13-F pinout, SMAJ26AQ-13-F application, or SMAJ26AQ-13-F equivalent, this page delivers verified clamping performance, AEC-Q101 compliance status, IATF 16949 manufacturing evidence, and direct comparison to SMAJ24AQ-13-F and SMAJ30AQ-13-F for 24–30V automotive supply rail protection.
Technical Context
This TVS operates as a unidirectional avalanche clamp on DC power lines, triggered when transient voltage exceeds 26V VRWM and clamping within 1 ns to ≤42.1V at 9.5A (10/1000μs waveform). Its glass-passivated die ensures stable breakdown under thermal cycling from −55°C to +175°C junction temperature.
Designed for automotive-grade reliability, it sustains 40A non-repetitive forward surge (8.3ms half-sine) and maintains <0.5μA leakage at 26V, enabling low-quiescent-current systems like always-on telematics modules without parasitic drain.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - Withstands ISO7637-2 Pulse 1 (−100V, 50Ω source) without failure |
| Reverse Standoff Voltage | 26V - Matches nominal 24V automotive battery systems with 10% margin above regulated rail |
| Max Clamping Voltage | 42.1V @ 9.5A - Limits downstream IC stress below 45V absolute maximum ratings of common MCU power pins |
| Breakdown Voltage | 28.9–31.9V @ 1mA - Ensures reliable turn-on before system overvoltage damage occurs |
| Leakage Current | <0.5μA @ 26V - Prevents measurable battery drain in sleep-mode vehicle networks |
| Operating Temp Range | −55°C to +175°C - Supports under-hood placement near engine control units |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic UL 94V-0 housing, cathode band polarity indicator, 0.064g weight, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink path to ground | Connected to protected line (e.g., 24V supply); conducts during overvoltage events |
| Cathode | Reference node / clamping voltage reference | Connected to system ground; defines clamping threshold relative to GND |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use per stress test requirements including HTGB, TCT, and HTRB |
| Glass-passivated die | Eliminates passivation layer defects that cause early-life failures in high-humidity under-hood environments |
| Lead-free & halogen-free | Meets RoHS 3 and automotive "Green" standards (<900ppm Br, <900ppm Cl, <1000ppm Sb) |
| 40A surge rating | Supports repeated exposure to alternator load dump transients without degradation |
| Uni-directional configuration | Blocks reverse polarity connection errors while providing forward-biased clamping only |
Applications
| Body Control Module (BCM) | Infotainment Power Supply |
|---|---|
Use Scenario: Protects 24V input rail of BCM microcontroller and CAN transceivers from load dump and jump-start surges. IC Role / Device Role: Primary overvoltage clamp on main power entry point before DC-DC converter. Use Value: Clamps transients to 42.1V, keeping downstream 48V-tolerant PMICs and MCUs within safe operating area. |
Use Scenario: Shields USB-C PD controller and display backlight drivers from ignition-switching noise and ESD. IC Role / Device Role: Secondary protection stage after bulk capacitor, filtering fast-rising ESD pulses per ISO10605. Use Value: Sub-1ns response limits voltage overshoot to <45V, preventing gate oxide rupture in 5V logic interfaces. |
| Engine Control Unit (ECU) | Telematics Control Unit (TCU) |
Use Scenario: Guards sensor interface lines (e.g., MAP, O2) connected to 5V analog front-end against coupled ignition coil spikes. IC Role / Device Role: Localized TVS at connector entry, minimizing trace inductance impact on clamping speed. Use Value: 0.5μA leakage avoids signal offset errors in precision 12-bit ADC references. |
Use Scenario: Secures LTE modem VBAT input against battery disconnect/reconnect transients in cellular-connected gateways. IC Role / Device Role: Standalone clamp on always-on 24V rail powering RTC and wake-up circuitry. Use Value: −55°C to +175°C operation ensures reliability during cold cranking and exhaust proximity mounting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24AQ-13-F | 24V VRWM, 38.9V VC @ 10.3A - lower clamping threshold, higher IPP | Better suited for 12V/24V dual-voltage platforms where tighter clamping margin is required | Select when protecting 3.3V/5V logic powered from buck-converted 24V rails with strict <40V clamp limit |
| SMAJ30AQ-13-F | 30V VRWM, 48.4V VC @ 8.3A - higher standoff, wider voltage margin, lower surge current | Preferred for 24V systems with large tolerance bands or legacy designs requiring ≥30V hold-off | Choose when guarding high-side switches or MOSFET gates where >30V transient immunity is mandated |
Compared with SMAJ24AQ-13-F and SMAJ30AQ-13-F, SMAJ26AQ-13-F provides optimal balance for modern 24V ECUs: sufficient margin above nominal 24V (26V VRWM), robust 42.1V clamping for 45V-rated ICs, and 9.5A surge capacity matching typical ISO7637-2 Pulse 1 energy profiles.
Availability
SMAJ26AQ-13-F is available at Aetrix Electronics and suitable for body control modules, infotainment power supplies, and telematics control units requiring stable component supply across automotive production lifecycles.
Supply support for SMAJ26AQ-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 for automotive, industrial, and consumer markets.
The SMAJ series is engineered specifically for AEC-Q101-compliant automotive transient suppression, targeting ISO7637-2 and ISO10605 compliance in engine, chassis, and infotainment subsystems.
FAQ
Is SMAJ26AQ-13-F certified to AEC-Q101?
Yes. SMAJ26AQ-13-F is fully AEC-Q101 qualified and manufactured in IATF 16949-certified facilities. Test reports cover HTGB, TCT, HTRB, and mechanical stress validation per Rev. 17 of DS40739. PPAP documentation is available upon request for production release.
What is the clamping voltage at 5A for SMAJ26AQ-13-F?
Per the electrical characteristics table in DS40739 Rev. 17, the max clamping voltage is specified at IPP = 9.5A (42.1V). Extrapolation to 5A is not provided; actual clamping at 5A is typically ~38–40V based on the device's dynamic resistance curve (Figure 3), but design must use the rated 42.1V value for safety margin.
Can SMAJ26AQ-13-F replace SMAJ26A-13-F in existing designs?
No. SMAJ26AQ-13-F is AEC-Q101 qualified and built in IATF 16949 facilities; SMAJ26A-13-F lacks automotive qualification and may differ in process control, traceability, and test coverage. Migration requires requalification per automotive change control protocols.
Does SMAJ26AQ-13-F meet ISO10605 for both air and contact discharge?
Yes. The datasheet confirms compliance with ISO10605 using C = 150pF, R = 330Ω: 30kV for both air discharge and contact discharge testing, validated per Diodes' internal qualification report referenced in DS40739.
SMAJ26AQ-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- 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):
- 9.5A
- Power - Peak Pulse:
- 400W
- 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:
- SMA
SMAJ26AQ-13-F FAQ
1.How can I place an order for SMAJ26AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ26AQ-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 SMAJ26AQ-13-F reliable?
The price and inventory of SMAJ26AQ-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 SMAJ26AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ26AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ26AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ26AQ-13-F?
SMAJ26AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ26AQ-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 SMAJ26AQ-13-F?
For technical support, including SMAJ26AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ26AQ-13-F requirements.
6.How does Aetrix verify that SMAJ26AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ26AQ-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 SMAJ26AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ26AQ-13-F?
All SMAJ26AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ26AQ-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 SMAJ26AQ-13-F part is unused and in its original packaging.
Return procedure for SMAJ26AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ26AQ-13-F Tags
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ESD9B5.0ST5G
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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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