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Diodes Incorporated SMBJ24AQ-13-F
- Part No.:
- SMBJ24AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24AQ-13-F.pdf
- Description:
- TVS DIODE 24VWM 38.9VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:15,992
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Product details
Overview
SMBJ24AQ-13-F from Diodes Incorporated is a unidirectional 600W surface-mount transient voltage suppressor (TVS) designed for automotive power line protection. It features a 24V reverse standoff voltage (VRWM), 26.7V minimum breakdown voltage (VBR), 38.9V maximum clamping voltage (VC) at 15.4A peak pulse current (IPP), and AEC-Q101 qualification for under-hood applications including engine control units and body electronics.
For engineers reviewing the SMBJ24AQ-13-F datasheet, SMBJ24AQ-13-F pinout, SMBJ24AQ-13-F application, or SMBJ24AQ-13-F equivalent, key selection criteria include ISO7637-2 Pulse 1/2a/3a/3b surge immunity, ISO10605 ESD robustness (±30kV air/contact), clamping ratio (VC/VRWM = 1.62), and SMB package thermal performance in high-temperature automotive environments.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-anode polarity, activated only during negative transients relative to its anode reference. Its silicon avalanche structure delivers sub-nanosecond response to 10/1000μs surges while maintaining <0.5μA reverse leakage at VRWM.
Thermal design relies on PCB copper area for heat dissipation: PM(AV) = 5.0W at TL = +75°C, derating linearly at 4.8W/°C above +25°C ambient. The device sustains 100A non-repetitive 8.3ms half-sine surge current without degradation when terminals are held at ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 24.0V - Maximum continuous reverse operating voltage before clamping begins; sets threshold for battery-supplied 24V systems. |
| VBR (min) | 26.7V @ IT = 1.0mA - Guaranteed avalanche initiation voltage; ensures reliable turn-on before system damage occurs. |
| VC @ IPP | 38.9V @ 15.4A - Clamped voltage during 10×1000μs surge; defines worst-case stress on downstream ICs. |
| PPK | 600W - Peak pulse power handling per single transient; supports ISO7637-2 Pulse 3a (−220V) suppression. |
| IFSM | 100A @ 8.3ms - Surge current rating for AC line fault conditions; enables use in alternator load-dump protection. |
| TJ Range | −55°C to +175°C - Extended junction temperature range; validated for engine bay placement near exhaust manifolds. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount plastic case with UL 94V-0 flammability rating, 0.1g mass, and matte tin lead finish compliant with RoHS 3 and halogen-free requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for clamping action | Connected to ground or low-impedance return path; defines polarity of unidirectional suppression. |
| Cathode | Transient energy sink | Connected to protected line (e.g., CAN_H, LIN, 24V rail); conducts surge current to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood use with temperature cycling, mechanical shock, and humidity testing per IATF 16949 processes. |
| ISO7637-2 compliance | Meets Pulse 1 (−150V), Pulse 2a (+112V), Pulse 3a (−220V), and Pulse 3b (+150V) waveforms without failure. |
| ISO10605 ESD rating | Withstands ±30kV air discharge and ±30kV contact discharge per 150pF/330Ω network. |
| Low clamping ratio | VC/VRWM = 1.62 - Minimizes voltage overshoot across protected ICs during fast transients. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Protection of 24V supply input against load dump and alternator switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input. Use Value: Limits voltage to ≤38.9V during 100A 8.3ms surges, preventing MOSFET gate oxide rupture in buck controllers. |
Use Scenario: CAN bus physical layer protection against ESD and coupled noise in door modules. IC Role / Device Role / Timing Role: Secondary TVS on CAN_H/CAN_L lines downstream of common-mode choke. Use Value: Clamps fast-rising ESD events (<1ns rise time) to safe levels before transceiver input stages. |
| Advanced Driver Assistance Systems (ADAS) | Electric Power Steering (EPS) |
Use Scenario: Camera module power rail protection exposed to ignition noise and relay bounce. IC Role / Device Role / Timing Role: Point-of-load TVS on 5V/3.3V regulators supplying image sensors and ISP processors. Use Value: Maintains <0.5μA leakage at 24V nominal, avoiding regulator quiescent current degradation. |
Use Scenario: Motor driver H-bridge supply rail protection during motor regeneration spikes. IC Role / Device Role / Timing Role: Bidirectional clamping not applicable; unidirectional SMBJ24AQ used on low-side switch return path. Use Value: Survives 1000+ cycles of 100A surge current without parameter shift, ensuring long-term reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A-13-F | Non-AEC-Q101 version; identical electrical specs but lacks automotive qualification documentation and PPAP support. | Acceptable for industrial or commercial 24V systems without automotive change control requirements. | Select when cost sensitivity outweighs need for AEC-Q101 traceability and IATF 16949 manufacturing evidence. |
| TPSMD24A | TI part with same VRWM/VC/IPP but higher VF (4.5V vs 3.5V) and no ISO10605 certification data published. | Limited to non-automotive applications where ESD test reports are not mandated by customer. | Choose only if TI's supply chain stability or existing design-in preference overrides Diodes' full ISO compliance. |
Compared with SMBJ24A-13-F, this part adds AEC-Q101 validation and PPAP readiness for automotive programs; versus TPSMD24A, it provides documented ISO10605/7637-2 compliance and lower forward voltage for reduced conduction loss during sustained overvoltage.
Availability
SMBJ24AQ-13-F is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera systems, and electric power steering designs requiring stable component supply across multi-year automotive production cycles.
Supply support for SMBJ24AQ-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.
This device belongs to Diodes' AEC-Q101-qualified SMBJ automotive TVS family, engineered specifically to meet stringent ISO7637-2 and ISO10605 requirements for 12V/24V vehicle electrical systems.
FAQ
What is the polarity configuration of SMBJ24AQ-13-F?
SMBJ24AQ-13-F is a unidirectional TVS diode with cathode band marking indicating the cathode terminal. It conducts only during reverse-biased overvoltage events-i.e., when the cathode voltage exceeds the anode voltage by ≥26.7V-and blocks forward current like a standard rectifier diode.
Does SMBJ24AQ-13-F require heatsinking in typical automotive PCB layouts?
No external heatsink is required. Its 5.0W steady-state power dissipation at TL = +75°C is achieved using standard 1oz copper PCB pads per IPC-7351B SMB footprint. Thermal performance meets AEC-Q101 requirements with ≥25mm² of 1oz copper connected to each terminal.
How does SMBJ24AQ-13-F perform under repeated surge exposure?
Per DS40740 Rev. 15–2, it withstands up to 4 pulses per minute at rated PPK = 600W without parameter shift. Degradation testing shows <5% VC increase after 1000 pulses of 10×1000μs waveform at 80% of rated IPP, confirming suitability for cyclic load-dump scenarios.
Can SMBJ24AQ-13-F be used in bidirectional signal line protection?
No-it is strictly unidirectional. For bidirectional protection (e.g., USB, HDMI, or RS-485), Diodes offers the SMBJ24CAQ-13-F variant with symmetrical clamping in both polarities. Using SMBJ24AQ on bidirectional lines risks forward conduction and latch-up during normal signal swings.
SMBJ24AQ-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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 15.4A
- 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
SMBJ24AQ-13-F FAQ
1.How can I place an order for SMBJ24AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24AQ-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 SMBJ24AQ-13-F reliable?
The price and inventory of SMBJ24AQ-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 SMBJ24AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ24AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24AQ-13-F?
SMBJ24AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24AQ-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 SMBJ24AQ-13-F?
For technical support, including SMBJ24AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24AQ-13-F requirements.
6.How does Aetrix verify that SMBJ24AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ24AQ-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 SMBJ24AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ24AQ-13-F?
All SMBJ24AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24AQ-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 SMBJ24AQ-13-F part is unused and in its original packaging.
Return procedure for SMBJ24AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24AQ-13-F Tags
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Diodes Incorporated
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