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Diodes Incorporated SMAJ7.5AQ-13-F
- Part No.:
- SMAJ7.5AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ7.5AQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR SMA
- Quantity:
- Payment:
- Shipping:
Inventory:7,088
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Product details
Overview
SMAJ7.5AQ-13-F from Diodes Incorporated is a unidirectional 400W automotive transient voltage suppressor (TVS) diode with 7.5V reverse standoff voltage, 12.9V max clamping voltage at 31A peak pulse current, and AEC-Q101 qualification. It protects CAN, LIN, and sensor interfaces in 12V automotive power domains against ISO7637-2 Pulse 1 (−100V), Pulse 2a (+50V), and ISO10605 ESD (±30kV).
For engineers reviewing the SMAJ7.5AQ-13-F datasheet, SMAJ7.5AQ-13-F pinout, SMAJ7.5AQ-13-F application, or SMAJ7.5AQ-13-F equivalent, this page delivers verified electrical parameters, automotive compliance evidence, clamping performance under standardized surge waveforms, and real-world circuit protection context for engine control units, body electronics, and ADAS sensor nodes.
Technical Context
This TVS diode operates as a unidirectional clamp between power rail and ground, activating above 8.33V breakdown (VBR min) to divert transients while maintaining <100µA leakage at 7.5V (VRWM). Its glass-passivated junction ensures stable avalanche behavior across −55°C to +175°C junction temperature range.
The device uses an 8.3ms half-sine surge waveform (per IEC 61000-4-5 & ISO7637-2) and achieves 400W peak pulse power within a 5,000-unit tape-and-reel package. Clamping occurs at 12.9V (VC) under 31A (IPP), limiting downstream voltage stress during load-dump or inductive switching events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - Sustains single 8.3ms half-sine surges without failure per ISO7637-2 Pulse 1/2a/3b. |
| Reverse Standoff Voltage | 7.5V - Blocks normal 12V automotive system ripple while remaining inactive below transient threshold. |
| Breakdown Voltage (min) | 8.33V - Guaranteed avalanche initiation point ensures predictable turn-on before downstream IC damage. |
| Clamping Voltage @ 31A | 12.9V - Limits voltage seen by protected MCU I/O or transceiver during worst-case 31A transient event. |
| Leakage Current @ 7.5V | 100µA - Negligible standby power loss in always-on vehicle modules (e.g., door modules, seat controllers). |
| AEC-Q101 Qualified | Qualified for automotive use - Validated for reliability under temperature cycling, HTRB, and mechanical shock per AEC standard. |
| Package | SMA - Surface-mount outline compatible with standard reflow profiles; 0.064g mass supports automated assembly. |
Pinout & Package
Package: SMA (Surface Mount Axial), molded plastic UL 94V-0 housing, cathode band marking for polarity identification. Moisture sensitivity level 1 (J-STD-020), lead-free matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection to ground reference | Completes clamping path during positive transients; must connect to low-impedance chassis or power ground plane. |
| Cathode | High-side connection to protected line | Connects to 12V rail or signal line; blocks reverse current until VRWM exceeded, then conducts surge to ground. |
Key Features
| Feature | Design Value |
|---|---|
| 400W Peak Pulse Power | Withstands ISO7637-2 Pulse 1 (−100V) on 12V systems without degradation or thermal runaway. |
| Glass Passivated Die | Ensures consistent avalanche characteristics over lifetime and temperature; eliminates passivation-related leakage drift. |
| AEC-Q101 Qualification | Validated for automotive underhood environments including 1000hr HTOL, 1000-cycle temperature cycling, and mechanical shock. |
| Lead-Free & Halogen-Free | Meets RoHS 3 (2015/863/EU) and "Green" definition: Br+Cl <1500ppm, Sb <1000ppm - compliant for global OEM supply chains. |
| Uni-directional Clamping | Blocks reverse current in DC systems; avoids false triggering on negative battery transients unlike bi-directional variants. |
Applications
| Engine Control Unit (ECU) Power Input | CAN FD Transceiver Protection |
|---|---|
|
Use Scenario: 12V battery feed to microcontroller power supply in engine bay, exposed to load dump and alternator ripple. IC Role / Device Role: Primary overvoltage clamp on main VCC rail upstream of LDO regulators. Use Value: Limits input to ≤12.9V during −100V ISO7637-2 Pulse 1, preventing LDO dropout and MCU brownout. |
Use Scenario: CAN_H/CAN_L lines in ADAS camera module connected to vehicle backbone. IC Role / Device Role: Point-of-entry transient suppression before CAN transceiver inputs. Use Value: Clamps ESD contact discharge (±30kV) to <13V, preserving transceiver common-mode range and bit error rate. |
| Body Control Module (BCM) Door Actuator Driver | Occupant Detection Sensor Interface |
|
Use Scenario: H-bridge motor driver output feeding window lift or mirror actuator with inductive kickback. IC Role / Device Role: Flyback energy diversion across motor terminals during PWM turn-off. Use Value: Absorbs 40A surge (derated) without latch-up, enabling compact layout without external snubbers. |
Use Scenario: Analog front-end of capacitive seat occupancy sensor tied to 5V analog supply. IC Role / Device Role: Secondary rail protection downstream of primary 12V-to-5V conversion. Use Value: Maintains <100µA leakage to avoid offset drift in precision ADC measurements during sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5A-13-F | No AEC-Q101 qualification; same electrical specs but not PPAP-capable. | Acceptable for non-safety-critical consumer or industrial 12V systems only. | Select only if automotive change control, IATF 16949 traceability, or PPAP documentation is unnecessary. |
| SMBJ7.5AQ-13-F | Same AEC-Q101 rating but SMB package (higher 600W PPK, larger footprint, 1.0W PM(AV)). | Better suited for high-energy zones like alternator output or battery junction boxes. | Choose when surge energy exceeds 400W capability or board space allows larger SMB outline. |
Compared with SMAJ7.5AQ-13-F, SMAJ7.5A-13-F lacks automotive qualification documentation and supply chain controls, while SMBJ7.5AQ-13-F trades PCB area for higher surge margin - making the SMAJ variant optimal for space-constrained, AEC-compliant node-level protection.
Availability
SMAJ7.5AQ-13-F is available at Aetrix Electronics and suitable for engine control units, body electronics modules, and ADAS sensor nodes requiring stable component supply with full automotive traceability and lifecycle management.
Supply support for SMAJ7.5AQ-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.
The SMAJ series targets AEC-Q101-compliant transient suppression in 12V/24V automotive subsystems, with design focus on ISO7637-2 and ISO10605 compliance, high-temperature reliability, and surface-mount manufacturability.
FAQ
What is the maximum clamping voltage of SMAJ7.5AQ-13-F under automotive surge conditions?
The maximum clamping voltage is 12.9V at 31A peak pulse current (IPP), measured using the standardized 10×1000μs double-exponential waveform per IEC 61000-4-5 and ISO7637-2. This value is guaranteed across −55°C to +175°C operating junction temperature and defines the upper voltage limit imposed on protected circuitry during transient events.
Does SMAJ7.5AQ-13-F meet AEC-Q101 requirements for under-hood applications?
Yes - SMAJ7.5AQ-13-F is fully AEC-Q101 qualified, manufactured in IATF 16949-certified facilities, and PPAP-capable. Test evidence includes high-temperature operating life (HTOL), temperature cycling, and mechanical shock validation per AEC-Q101 Rev D, supporting deployment in engine control units, transmission control modules, and other under-hood locations.
How does the unidirectional configuration affect circuit protection strategy?
The unidirectional configuration blocks reverse current flow below 7.5V and clamps only positive transients toward ground. This prevents false triggering on negative battery spikes (e.g., ISO7637-2 Pulse 3a: −150V), making it ideal for DC-powered nodes where bidirectional clamping would compromise normal operation or increase leakage.
What is the steady-state power dissipation rating and its thermal implication?
The steady-state power dissipation is 1.0W at lead temperature (TL) = +75°C. This rating governs continuous power handling during abnormal conditions (e.g., sustained overvoltage), requiring adequate copper pour and thermal vias to maintain TL ≤75°C - critical for long-term reliability in sealed automotive enclosures.
SMAJ7.5AQ-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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 31A
- 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
SMAJ7.5AQ-13-F FAQ
1.How can I place an order for SMAJ7.5AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ7.5AQ-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 SMAJ7.5AQ-13-F reliable?
The price and inventory of SMAJ7.5AQ-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 SMAJ7.5AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ7.5AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ7.5AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ7.5AQ-13-F?
SMAJ7.5AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ7.5AQ-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 SMAJ7.5AQ-13-F?
For technical support, including SMAJ7.5AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ7.5AQ-13-F requirements.
6.How does Aetrix verify that SMAJ7.5AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ7.5AQ-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 SMAJ7.5AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ7.5AQ-13-F?
All SMAJ7.5AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ7.5AQ-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 SMAJ7.5AQ-13-F part is unused and in its original packaging.
Return procedure for SMAJ7.5AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ7.5AQ-13-F Tags
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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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Diodes Incorporated
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