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Diodes Incorporated SMAJ24AQ-13-F
- Part No.:
- SMAJ24AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ24AQ-13-F.pdf
- Description:
- TVS DIODE 24VWM 38.9VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:13,898
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Product details
Overview
SMAJ24AQ-13-F from Diodes Incorporated is a unidirectional 400W automotive transient voltage suppressor (TVS) diode with 24V reverse standoff voltage, 38.9V max clamping voltage at 10.3A peak pulse current, and AEC-Q101 qualification for under-hood electronics protection against ISO7637-2 Pulse 1/2a/3a/3b and ISO10605 ESD events.
For engineers reviewing the SMAJ24AQ-13-F datasheet, SMAJ24AQ-13-F pinout, SMAJ24AQ-13-F application, or SMAJ24AQ-13-F equivalent, this device serves as a primary surge protection component in 12V/24V automotive power rails, infotainment interfaces, and CAN/LIN transceiver inputs where precise clamping, low leakage (<0.5µA), and IATF 16949 traceable manufacturing are required.
Technical Context
This TVS diode operates as a unidirectional clamp between power rail and ground, activating above 24V VRWM to divert surge energy while maintaining <0.5µA reverse leakage at rated voltage. Its glass-passivated junction ensures stable breakdown behavior across -55°C to +175°C junction temperature range.
The 400W peak pulse power rating is defined per 10×1000µs waveform (Figure 4), with clamping voltage tightly controlled at 38.9V (max) to protect downstream 3.3V/5V logic and analog circuitry without overvoltage stress. It supports single-pulse surge handling up to 40A IFSM at 8.3ms half-sine wave.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 24V - Maximum continuous operating voltage before clamping begins; matches 24V automotive battery systems. |
| VBR (min/max) | 26.7V / 29.5V - Breakdown occurs within this band at 1mA test current; ensures reliable turn-on margin above VRWM. |
| VC @ IPP | 38.9V @ 10.3A - Clamped voltage during 10×1000µs surge; limits downstream IC stress to safe levels. |
| PPK | 400W - Peak pulse power dissipation capability; handles ISO7637-2 Pulse 1 (-100V) and Pulse 3a (-150V) transients. |
| IR @ VRWM | <0.5µA - Ultra-low reverse leakage preserves battery life in always-on vehicle modules. |
| IFSM | 40A - Peak forward surge current rating for 8.3ms half-sine wave; supports high-energy load dump immunity. |
| TJ Range | -55°C to +175°C - Full automotive temperature operation; validated for engine control unit (ECU) mounting locations. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic UL 94V-0 housing; cathode band indicates polarity on unidirectional variant; weight ≈ 0.064g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground plane; forms low-inductance return path for surge current. |
| Cathode | Power rail connection | Connected to protected line (e.g., 24V supply); conducts during overvoltage to shunt energy to ground. |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power | Enables compliance with ISO7637-2 Pulse 1 (-100V), Pulse 2a (+50V), and Pulse 3a (-150V) without derating. |
| AEC-Q101 qualified | Validated for automotive use with PPAP documentation support and IATF 16949 certified manufacturing. |
| Glass passivated die | Ensures stable VBR and low leakage across temperature and lifetime; eliminates moisture-induced parameter drift. |
| Lead-free & halogen-free | Meets RoHS 3 (2015/863/EU) and automotive "Green" standards (<900ppm Br, <900ppm Cl, <1000ppm Sb). |
| Moisture sensitivity Level 1 | Eliminates bake requirements prior to reflow; compatible with standard SMT assembly processes. |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) LIN Bus |
|---|---|
Use Scenario: Protection of 24V main supply input against load dump and alternator transients in diesel engine ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and DC-DC converter input. Use Value: Limits clamped voltage to 38.9V, preventing damage to 40V-rated input capacitors and enabling robust 24V system design. |
Use Scenario: ESD and surge protection on LIN bus lines in door module controllers exposed to human contact. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between LIN signal and ground, adjacent to transceiver. Use Value: With <0.5µA leakage and fast response, it avoids signal distortion while passing ISO10605 ±30kV air/contact discharge. |
| Advanced Driver Assistance Systems (ADAS) Camera Power | Infotainment Head Unit USB Interface |
Use Scenario: Protecting 12V camera power feed in front-facing ADAS cameras mounted behind windshield. IC Role / Device Role / Timing Role: Primary surge suppression on camera module's external power connector. Use Value: 400W rating absorbs ISO7637-2 Pulse 3b (+100V) induced by nearby relay switching without thermal runaway. |
Use Scenario: Safeguarding USB VBUS line in head units connected to vehicle charging ports subject to hot-plug surges. IC Role / Device Role / Timing Role: TVS placed inline with USB power path upstream of USB controller IC. Use Value: Clamps transients to ≤38.9V, protecting 5V-tolerant USB PHYs and meeting OEM USB power integrity specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-13-F | Non-AEC-Q101 version; same electrical specs but not PPAP-capable or manufactured in IATF 16949 facility. | Limited to non-safety-critical consumer or industrial applications; not approved for automotive production BOMs. | Select only if AEC-Q101 compliance and automotive change control are not required. |
| TPSMD24A | TI part with identical VRWM (24V), VC = 38.9V, but higher IR (1µA) and no AEC-Q101 listing in public datasheet. | Used in TI reference designs for automotive body electronics but lacks formal PPAP documentation support. | Prefer SMAJ24AQ-13-F when full automotive qualification and traceable sourcing are mandatory. |
Compared with SMAJ24A-13-F and TPSMD24A, SMAJ24AQ-13-F uniquely delivers AEC-Q101 qualification, IATF 16949 manufacturing, and documented PPAP readiness-critical for Tier 1 automotive programs requiring audit-ready component validation.
Availability
SMAJ24AQ-13-F is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera power supplies, and infotainment USB interfaces requiring stable component supply across multi-year automotive production cycles.
Supply support for SMAJ24AQ-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 computing markets.
This device belongs to the SMAJ(AQ) series of AEC-Q101-qualified TVS diodes engineered specifically for automotive power rail and data line surge protection per ISO7637-2 and ISO10605 standards.
FAQ
What is the maximum clamping voltage of SMAJ24AQ-13-F under standard test conditions?
The maximum clamping voltage (VC) is 38.9V at 10.3A peak pulse current, measured using the standardized 10×1000µs waveform per Figure 4 of DS40739 Rev. 17–2. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events.
Does SMAJ24AQ-13-F support bidirectional surge protection?
No - SMAJ24AQ-13-F is a unidirectional TVS diode, indicated by the absence of "C" in its part number. Bidirectional variants (e.g., SMAJ24CAQ-13-F) exist in the same family but feature symmetric clamping in both polarities and lack a cathode band marking.
Is SMAJ24AQ-13-F compliant with RoHS 3 and automotive green standards?
Yes - it meets EU Directive 2015/863/EU (RoHS 3), contains <900ppm bromine, <900ppm chlorine, and <1000ppm antimony compounds, and carries Diodes Incorporated's official "Green" designation per their published definitions.
What is the thermal derating behavior of SMAJ24AQ-13-F above +25°C ambient?
Peak pulse power remains at 400W up to +25°C ambient; above that, it follows the curve in Figure 1 of DS40739, reducing linearly to ~200W at +85°C ambient and ~100W at +125°C ambient, based on fixed lead temperature assumptions and non-repetitive pulse conditions.
SMAJ24AQ-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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 10.3A
- 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
SMAJ24AQ-13-F FAQ
1.How can I place an order for SMAJ24AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ24AQ-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 SMAJ24AQ-13-F reliable?
The price and inventory of SMAJ24AQ-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 SMAJ24AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ24AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ24AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ24AQ-13-F?
SMAJ24AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ24AQ-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 SMAJ24AQ-13-F?
For technical support, including SMAJ24AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ24AQ-13-F requirements.
6.How does Aetrix verify that SMAJ24AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ24AQ-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 SMAJ24AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ24AQ-13-F?
All SMAJ24AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ24AQ-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 SMAJ24AQ-13-F part is unused and in its original packaging.
Return procedure for SMAJ24AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ24AQ-13-F Tags
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