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Diodes Incorporated SMAJ58AQ-13-F
- Part No.:
- SMAJ58AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58AQ-13-F.pdf
- Description:
- TVS DIODE 58VWM 93.6VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:26,670
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Product details
Overview
SMAJ58AQ-13-F from Diodes Incorporated is a unidirectional 400W automotive transient voltage suppressor (TVS) diode with 58V reverse standoff voltage, 93.6V max clamping voltage at 4.3A peak pulse current, and AEC-Q101 qualification for under-hood engine control unit (ECU) power rail protection against ISO7637-2 Pulse 1/2a/3a/3b transients.
For engineers reviewing the SMAJ58AQ-13-F datasheet, SMAJ58AQ-13-F pinout, SMAJ58AQ-13-F application, or SMAJ58AQ-13-F equivalent, this device serves as a primary surge protection component in 12V/24V automotive power networks where precise clamping, low leakage (<0.5µA @ 58V), and IATF 16949-manufactured reliability are required.
Technical Context
This unidirectional TVS operates as a shunt-clamping device triggered by overvoltage events exceeding its 58V VRWM threshold, with breakdown occurring between 64.4V and 71.2V at 1mA test current. Its glass-passivated die ensures stable performance across -55°C to +175°C junction temperature range.
It delivers 400W peak pulse power per 10×1000µs waveform (per Figure 4), supports 40A non-repetitive forward surge current (8.3ms half-sine), and maintains ≤3.5V instantaneous forward voltage at 35A - critical for minimizing voltage overshoot during fast-rising load-dump transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single-event surges per ISO7637-2 without failure |
| Reverse Standoff Voltage | 58V - blocks normal 12V/24V system operation while triggering above battery overvoltage thresholds |
| Max Clamping Voltage | 93.6V @ 4.3A - limits downstream IC stress during 10×1000µs transients |
| Breakdown Voltage Range | 64.4–71.2V @ 1mA - ensures reliable turn-on margin above VRWM |
| Reverse Leakage | <0.5µA @ 58V - prevents parasitic drain in always-on vehicle modules |
| Operating Temperature | -55°C to +175°C - qualified for direct-mount engine compartment placement |
Pinout & Package
Package: SMA (Surface-Mount Axial), molded plastic UL 94V-0 housing, 0.064g mass, cathode band polarity indicator, lead-free matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during clamping | Connected to protected circuit ground or low-side return path |
| Cathode | Current source during clamping | Connected to protected line (e.g., battery feed or ECU input rail) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use with PPAP capability and IATF 16949 manufacturing |
| Glass passivated die | Ensures long-term stability of VBR and leakage under thermal cycling and humidity |
| ISO10605 & ISO7637-2 compliance | Meets full automotive EMC immunity requirements including 30kV ESD and load dump pulses |
| Uni-directional architecture | Provides asymmetric protection ideal for DC power rails with defined polarity |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) CAN Bus Power |
|---|---|
Use Scenario: Protects 12V supply rail of gasoline/diesel engine ECUs from alternator load dump and battery reversal transients. IC Role / Device Role / Timing Role: Shunt-clamping TVS placed directly at ECU connector entry point before main regulator. Use Value: Limits transient voltage to ≤93.6V, preventing damage to 100V-rated buck converters and microcontrollers. | Use Scenario: Shields 12V power feeding isolated CAN transceivers in BCMs from ignition-induced spikes. IC Role / Device Role / Timing Role: Primary surge suppression on VCC line upstream of CAN bus power conditioning stage. Use Value: Maintains <0.5µA leakage to avoid waking sleep-mode CAN nodes during vehicle off-state. |
| ADAS Camera Power Supply | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Safeguards 12V input to image sensor SoCs and ISP processors in front/rear-view cameras. IC Role / Device Role / Timing Role: First-line defense against ISO7637-2 Pulse 3b (+100V) induced by high-current actuator switching. Use Value: Clamps within 1ns response time to preserve signal integrity of MIPI CSI-2 video links. | Use Scenario: Guards gate driver IC power rails in EPS motor inverters exposed to inductive kickback. IC Role / Device Role / Timing Role: Parallel-connected TVS on 12V auxiliary supply feeding high-side/low-side drivers. Use Value: Withstands 40A 8.3ms surge without degradation, ensuring uninterrupted torque control during emergency maneuvers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58A-13-F | Non-automotive grade; lacks AEC-Q101 qualification and PPAP support | Restricted to non-safety-critical consumer or industrial power supplies | Select only if automotive change control and IATF 16949 traceability are not required |
| SMCJ58A-Q | Higher 1500W rating in larger SMC package; same 58V VRWM and 93.6V VC | Used where higher surge margin is needed (e.g., heavy-duty truck 24V systems) | Choose when PCB space allows SMC footprint and >400W pulse handling is mandated |
Compared with SMAJ58A-13-F, the AQ variant adds automotive qualification and tighter process controls; versus SMCJ58A-Q, it trades surge capacity for compact SMA footprint - making SMAJ58AQ-13-F optimal for space-constrained ECU designs requiring certified reliability.
Availability
SMAJ58AQ-13-F is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera systems, and electric power steering electronics requiring stable component supply with full automotive traceability.
Supply support for SMAJ58AQ-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 with focus on automotive, industrial, and computing markets.
The SMAJ(AQ) series is part of Diodes' automotive-grade TVS portfolio, engineered specifically for ISO7637-2 and ISO10605 compliance in harsh-temperature vehicle environments.
FAQ
What is the difference between SMAJ58AQ-13-F and SMAJ58A-13-F?
SMAJ58AQ-13-F is AEC-Q101 qualified, manufactured in IATF 16949-certified facilities, and PPAP-capable - essential for automotive production. SMAJ58A-13-F lacks these qualifications and is intended for commercial/industrial use only. Both share identical electrical specs but differ in process control, testing rigor, and documentation traceability.
Can SMAJ58AQ-13-F be used in bi-directional configurations?
No - SMAJ58AQ-13-F is unidirectional only, indicated by absence of "C" suffix. For bi-directional protection (e.g., AC lines or differential buses), use SMAJ58CAQ-13-F, which has symmetric clamping and no polarity marking. Substituting unidirectional for bidirectional risks failure during negative transients.
What is the maximum ambient temperature for continuous operation?
SMAJ58AQ-13-F operates continuously up to +175°C junction temperature. At TA = +85°C, derated steady-state power dissipation is ~0.6W (per Figure 6). PCB layout must ensure adequate copper area and thermal vias to maintain TJ ≤ 175°C under worst-case ambient and power loss conditions.
Does this TVS require external heat sinking?
No external heatsink is required - the SMA package relies on PCB copper pour for thermal management. With 1.0W PM(AV) at TL = +75°C and 0.064g mass, thermal resistance from junction-to-lead is ~75°C/W. Designers must provide ≥100mm² of 2oz copper connected to both terminals to achieve safe operating temperatures in under-hood environments.
SMAJ58AQ-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):
- 58V
- Voltage - Breakdown (Min):
- 64.4V
- Voltage - Clamping (Max) @ Ipp:
- 93.6V
- Current - Peak Pulse (10/1000µs):
- 4.3A
- 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
SMAJ58AQ-13-F FAQ
1.How can I place an order for SMAJ58AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58AQ-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 SMAJ58AQ-13-F reliable?
The price and inventory of SMAJ58AQ-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 SMAJ58AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ58AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58AQ-13-F?
SMAJ58AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58AQ-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 SMAJ58AQ-13-F?
For technical support, including SMAJ58AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58AQ-13-F requirements.
6.How does Aetrix verify that SMAJ58AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ58AQ-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 SMAJ58AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ58AQ-13-F?
All SMAJ58AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58AQ-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 SMAJ58AQ-13-F part is unused and in its original packaging.
Return procedure for SMAJ58AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ58AQ-13-F Tags
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