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Diodes Incorporated SMAJ90CAQ-13-F
- Part No.:
- SMAJ90CAQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ90CAQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:7,889
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Product details
Overview
SMAJ90CAQ-13-F from Diodes Incorporated is a bi-directional 400W automotive transient voltage suppressor (TVS) diode with 90V reverse standoff voltage, 146V max clamping voltage at 2.7A 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 SMAJ90CAQ-13-F datasheet, SMAJ90CAQ-13-F pinout, SMAJ90CAQ-13-F application, or SMAJ90CAQ-13-F equivalent, key selection criteria include clamping voltage margin relative to system rail, peak pulse current capability under 10/1000μs waveform, bi-directional surge handling for AC-coupled or floating lines, and IATF 16949 manufacturing traceability.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) of 100–111V at 1mA test current and clamps transients to ≤146V at IPP = 2.7A per the standardized 10×1000μs waveform. Its glass-passivated die ensures stable leakage (<0.5μA at VRWM) and robust surge endurance.
Designed for automotive power line and signal line protection, it sustains 400W non-repetitive peak pulse power with thermal derating above +25°C ambient and maintains operation from –55°C to +175°C junction temperature-critical for engine control units and body electronics exposed to thermal cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - withstands ISO7637-2 Pulse 1 (–100V) and Pulse 3a (–150V) without failure |
| Reverse Standoff Voltage (VRWM) | 90V - sets minimum operating voltage threshold before clamping begins on either polarity |
| Max Clamping Voltage (VC) | 146V @ IPP = 2.7A - defines worst-case voltage seen by protected IC during 10/1000μs surge |
| Breakdown Voltage (VBR) | 100–111V @ IT = 1mA - ensures reliable turn-on margin above VRWM for predictable clamping onset |
| Leakage Current (IR) | <0.5μA @ VRWM - negligible standby power loss and no interference with high-impedance sensor inputs |
| Operating Temperature | –55°C to +175°C - supports placement near engines, transmissions, and power inverters |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic UL 94V-0 housing; cathode band omitted (bi-directional device); moisture sensitivity level 1 per J-STD-020; weight ≈0.064g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during negative transients | Clamps negative surges (e.g., ISO7637-2 Pulse 1, Pulse 3a) by conducting to ground |
| Cathode | Current entry point during positive transients | Clamps positive surges (e.g., ISO7637-2 Pulse 2a, Pulse 3b) by conducting to VCC or ground return |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping symmetry | Identical VBR (100–111V) and VC (146V) for both polarities-enables single-device protection of AC-coupled or floating buses like LIN or CAN stubs |
| AEC-Q101 qualification | Validated for automotive use with PPAP capability and full change control-meets reliability requirements for safety-critical ECUs |
| Glass-passivated die construction | Stable electrical parameters over lifetime and temperature-prevents parameter drift in harsh under-hood environments |
| Lead-free, halogen-free "Green" design | RoHS 3 compliant with Br+Cl <1500ppm and Sb <1000ppm-supports global automotive environmental compliance programs |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) LIN Bus |
|---|---|
Use Scenario: Protects 12V supply rail of gasoline/diesel engine ECUs from load dump and alternator ripple. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between battery input and DC-DC converter input stage. Use Value: Clamps ISO7637-2 Pulse 1 (–100V) and Pulse 2a (+50V) within safe margin of downstream regulator's absolute maximum rating. |
Use Scenario: Shields LIN transceiver pins from ESD and coupled noise in door modules and seat controllers. IC Role / Device Role / Timing Role: Bi-directional TVS connected across LIN bus differential pair (LIN_H/L). Use Value: Maintains signal integrity during ISO10605 contact discharge (30kV) without latch-up or degradation of LIN timing margins. |
| Electric Power Steering (EPS) Motor Driver | ADAS Camera Power Interface |
Use Scenario: Safeguards H-bridge gate drivers and current sense amplifiers from inductive kickback during motor commutation. IC Role / Device Role / Timing Role: TVS mounted at motor driver PCB edge, shunting transients to chassis ground. Use Value: Limits voltage overshoot to ≤146V during 2.7A surge-prevents MOSFET avalanche failure and preserves PWM timing fidelity. |
Use Scenario: Guards 5V/3.3V camera module power input against hot-plug transients and ESD in rear-view and surround-view systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of LDO regulators feeding image sensors and ISP SoCs. Use Value: Ensures uninterrupted video stream during ISO10605 air discharge (30kV) by limiting clamping time to <1ns and holding rail voltage within ±5% tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90A-13-F | Uni-directional; lacks negative-polarity clamping; same VRWM/VC/PPK specs | Only suitable for DC-biased rails where negative transients are blocked by series diode or circuit topology | Select only if system architecture guarantees unidirectional surge exposure and cost sensitivity outweighs design flexibility |
| SMCJ90CA | Higher PPK (1500W); larger SMC (DO-214AB) package; identical VRWM/VC but higher IPP (10.4A) | Used where higher energy absorption is required (e.g., main battery feed vs. sub-system rail) | Choose when surge threat level exceeds 400W-e.g., front-end protection before fuse box or junction box distribution |
Compared with SMAJ90A-13-F, this bi-directional variant eliminates polarity dependency and simplifies layout on floating or AC-coupled lines; versus SMCJ90CA, it trades surge capacity for space-constrained placement in dense ECU modules where 400W suffices.
Availability
SMAJ90CAQ-13-F is available at Aetrix Electronics and suitable for engine control units, body control modules, electric power steering systems, and ADAS camera interfaces requiring stable component supply with full automotive-grade traceability and lifecycle support.
Supply support for SMAJ90CAQ-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets, with IATF 16949-certified facilities and AEC-Q101 product validation.
The SMAJ(C)AQ series targets automotive electronics requiring certified surge immunity-designed specifically to meet ISO7637-2 and ISO10605 compliance in space-constrained, thermally demanding environments.
FAQ
What does the 'C' suffix in SMAJ90CAQ-13-F signify?
The 'C' denotes bi-directional configuration-this device clamps transients of either polarity symmetrically, unlike uni-directional variants (e.g., SMAJ90AQ-13-F) that only protect against positive surges. It has no cathode band marking, confirming its bidirectional nature per Diodes' datasheet marking convention.
Is SMAJ90CAQ-13-F suitable for protecting CAN FD physical layer circuits?
No-it is not optimized for high-speed data lines. With typical junction capacitance >100pF (inferred from SMAJ series family data), it would distort CAN FD bit timing above 2 Mbps. Use low-capacitance TVS arrays like D3V3Z5U2P or SP1003 for CAN FD protection instead.
How does the 400W rating translate to real-world surge events?
The 400W peak pulse power is specified for the standardized 10×1000μs waveform. In practice, it corresponds to clamping ISO7637-2 Pulse 1 (–100V, 50Ω source) at ≤146V and Pulse 3a (–150V, 50Ω) at the same VC, enabling reliable protection of 12V/24V automotive subsystems without thermal runaway.
Does SMAJ90CAQ-13-F require heatsinking in typical automotive mounting?
No additional heatsink is required. Its 1.0W steady-state power dissipation at TL = +75°C and low thermal resistance (junction-to-lead ≈25°C/W) allow direct PCB copper pour attachment for thermal relief. Standard 1oz copper pads per Diodes' recommended SMA layout suffice for continuous operation.
SMAJ90CAQ-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:
- -
- Bidirectional Channels:
- 1
- 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
SMAJ90CAQ-13-F FAQ
1.How can I place an order for SMAJ90CAQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ90CAQ-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 SMAJ90CAQ-13-F reliable?
The price and inventory of SMAJ90CAQ-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 SMAJ90CAQ-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ90CAQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ90CAQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ90CAQ-13-F?
SMAJ90CAQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ90CAQ-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 SMAJ90CAQ-13-F?
For technical support, including SMAJ90CAQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ90CAQ-13-F requirements.
6.How does Aetrix verify that SMAJ90CAQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ90CAQ-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 SMAJ90CAQ-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ90CAQ-13-F?
All SMAJ90CAQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ90CAQ-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 SMAJ90CAQ-13-F part is unused and in its original packaging.
Return procedure for SMAJ90CAQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ90CAQ-13-F Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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