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Diodes Incorporated SMAJ90AQ-13-F
- Part No.:
- SMAJ90AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ90AQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:8,809
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Product details
Overview
SMAJ90AQ-13-F from Diodes Incorporated is a unidirectional 400W surface-mount automotive transient voltage suppressor (TVS) diode with 90V reverse standoff voltage, 100V minimum breakdown voltage, and 146V maximum clamping voltage at 2.7A peak pulse current. It protects CAN, LIN, and power-line circuits in engine control units and body electronics against ISO7637-2 Pulse 1/2a/3a/3b transients and ISO10605 ESD events.
For engineers reviewing the SMAJ90AQ-13-F datasheet, SMAJ90AQ-13-F pinout, SMAJ90AQ-13-F application, or SMAJ90AQ-13-F equivalent, key selection criteria include clamping voltage margin relative to system rail, peak pulse current capability under 10/1000μs waveform, AEC-Q101 qualification status, and SMA package thermal performance in high-temperature under-hood environments.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds 100V (VBR min), limiting transient energy via controlled avalanche conduction. Its glass-passivated die ensures stable breakdown characteristics across -55°C to +175°C junction temperature range.
Designed for automotive power line protection, it meets ISO7637-2 Pulse 1 (-100V), Pulse 2a (+50V), Pulse 3a (-150V), and Pulse 3b (+100V) requirements, with 30kV air/contact ESD immunity per ISO10605 using 150pF/330Ω network.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - Sustains 10×1000μs transient surges without failure under defined derating. |
| Reverse Standoff Voltage (VRWM) | 90V - Maximum continuous DC or RMS voltage before significant leakage; sets operating margin below 12V/24V battery systems. |
| Breakdown Voltage (VBR) | 100–111V @ 1mA - Confirmed avalanche initiation range; ensures reliable turn-on before downstream IC damage thresholds. |
| Clamping Voltage (VC) | 146V @ 2.7A - Maximum voltage seen by protected circuit during 10×1000μs surge; defines safe overvoltage ceiling. |
| Peak Pulse Current (IPP) | 2.7A - Peak current handled at VC; correlates directly with surge energy absorption (E ≈ 0.5 × VC × IPP × t). |
| Leakage Current (IR) | ≤0.5μA @ 90V - Ultra-low standby leakage preserves battery life in always-on vehicle modules. |
| AEC-Q101 Qualified | Yes - Validated for automotive use including temperature cycling, HTRB, and ESD stress per AEC reliability test plan. |
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 | Low-side reference terminal | Connected to ground or low-impedance return path; forms current loop with cathode during clamping. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., CAN_H, 12V rail); conducts avalanche current to anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power | Enables robust protection against severe load dump and inductive switching transients in 12V/24V automotive architectures. |
| Glass passivated die | Ensures long-term parameter stability and reduced parameter drift over temperature and lifetime vs. epoxy-passivated alternatives. |
| AEC-Q101 qualification | Validates suitability for safety-critical automotive subsystems including powertrain, chassis, and ADAS sensor interfaces. |
| Lead-free, halogen-free, RoHS 3 compliant | Meets global environmental regulations and supports lead-free reflow soldering (JEDEC J-STD-020 Level 1 moisture sensitivity). |
Applications
| Engine Control Unit (ECU) Power Input | CAN FD Transceiver Protection |
|---|---|
|
Use Scenario: 12V battery feed to microcontroller power supply in gasoline/diesel ECUs exposed to load dump and alternator ripple. IC Role / Device Role: Unidirectional TVS clamp placed between battery rail and DC-DC input, shunting transients to ground. Use Value: Limits voltage to ≤146V during ISO7637-2 Pulse 1 (-100V) and Pulse 3b (+100V), preventing LDO or buck converter overvoltage failure. |
Use Scenario: High-speed CAN FD bus lines (CAN_H/CAN_L) in vehicle domain controllers subject to ESD and coupled noise. IC Role / Device Role: Paired unidirectional TVS devices (one per line) referenced to ground, suppressing fast transients while preserving signal integrity. Use Value: Clamps ESD events to <146V within 1ns response time, maintaining CAN FD bit rate up to 5Mbps without data corruption. |
| Body Control Module (BCM) LIN Bus | Automotive Lighting Driver Input |
|
Use Scenario: LIN bus physical layer in door modules, seat controls, and mirror actuators subjected to wiring harness coupling and battery disconnect spikes. IC Role / Device Role: Single unidirectional TVS on LIN line referenced to ground, absorbing negative-going pulses per ISO7637-2 Pulse 3a (-150V). Use Value: Prevents LIN transceiver latch-up or permanent damage during 150V negative transients, ensuring communication continuity. |
Use Scenario: 24V input to LED driver ICs in headlamps and tail lamps, where load dump can exceed 60V for >400ms. IC Role / Device Role: Primary overvoltage clamp on main power rail upstream of driver IC, diverting surge energy before regulation stage. Use Value: Absorbs 400W peak energy without degradation, enabling compliance with SAE J1113-11 load dump immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90A-13-F | No AEC-Q101 qualification; standard industrial grade only. | Not approved for automotive production; suitable for non-safety-critical prototypes or aftermarket modules. | Select only if AEC-Q101 is not required and cost is primary constraint. |
| SMCJ90A-Q | Higher 1500W peak power; DO-214AB (SMC) package; 10% higher clamping voltage (162V). | Better suited for 24V systems with higher-energy transients; larger footprint limits PCB density. | Choose when surge energy exceeds 400W capability or when board layout allows SMC package. |
Compared with SMAJ90A-13-F, SMAJ90AQ-13-F adds AEC-Q101 validation and PPAP support for automotive production, while SMCJ90A-Q trades compact SMA size for higher surge capacity-making SMAJ90AQ-13-F optimal for space-constrained, qualified 12V/24V ECU and sensor node designs.
Availability
SMAJ90AQ-13-F is available at Aetrix Electronics and suitable for engine control units, CAN FD networks, body control modules, and automotive lighting systems requiring stable component supply with full automotive qualification traceability.
Supply support for SMAJ90AQ-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, with manufacturing certified to IATF 16949.
The SMAJ-AQ series targets automotive-grade transient suppression, delivering AEC-Q101-qualified TVS diodes optimized for ISO7637-2 and ISO10605 compliance in harsh-temperature vehicle environments.
FAQ
What is the maximum operating temperature for SMAJ90AQ-13-F?
The device supports junction temperatures from -55°C to +175°C, validated per AEC-Q101 thermal cycling and high-temperature reverse bias tests. Its SMA package achieves 1.0W steady-state power dissipation at 75°C lead temperature, making it suitable for under-hood applications near engines or power electronics.
Does SMAJ90AQ-13-F meet ISO10605 ESD requirements?
Yes-it is rated for 30kV air discharge and 30kV contact discharge per ISO10605 using a 150pF capacitor and 330Ω resistor network, confirmed in Diodes' DS40739 datasheet Section "Description and Applications" and verified through AEC-Q101 ESD testing.
Can SMAJ90AQ-13-F be used in bidirectional signal lines like RS-485?
No-SMAJ90AQ-13-F is unidirectional only, with cathode-anode polarity. For bidirectional lines, use SMAJ90CQ-13-F (the 'C' suffix denotes bidirectional version), which clamps symmetrically above and below ground without polarity constraints.
How does the 146V clamping voltage impact system design margin?
At 2.7A peak pulse current, 146V clamping provides ≥56V margin above the 90V VRWM, ensuring protected ICs with 150V absolute maximum ratings (e.g., many CAN transceivers) remain within safe operating area during worst-case ISO7637-2 transients.
SMAJ90AQ-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- Series:
- SMAJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 146V
- Current - Peak Pulse (10/1000µs):
- 2.7A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
SMAJ90AQ-13-F FAQ
1.How can I place an order for SMAJ90AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ90AQ-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 SMAJ90AQ-13-F reliable?
The price and inventory of SMAJ90AQ-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 SMAJ90AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ90AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ90AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ90AQ-13-F?
SMAJ90AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ90AQ-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 SMAJ90AQ-13-F?
For technical support, including SMAJ90AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ90AQ-13-F requirements.
6.How does Aetrix verify that SMAJ90AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ90AQ-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 SMAJ90AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ90AQ-13-F?
All SMAJ90AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ90AQ-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 SMAJ90AQ-13-F part is unused and in its original packaging.
Return procedure for SMAJ90AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ90AQ-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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