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Diodes Incorporated SMAJ54AQ-13-F
- Part No.:
- SMAJ54AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ54AQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:2,481
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Product details
Overview
SMAJ54AQ-13-F from Diodes Incorporated is a unidirectional 400W automotive transient voltage suppressor (TVS) diode with 54V reverse standoff voltage, 87.1V max clamping voltage at 4.6A peak pulse current, and AEC-Q101 qualification for under-hood power line protection in ISO7637-2 Pulse 1/2a/3a/3b-compliant systems.
For engineers reviewing the SMAJ54AQ-13-F datasheet, SMAJ54AQ-13-F pinout, SMAJ54AQ-13-F application, or SMAJ54AQ-13-F equivalent, this device serves as a primary surge protection component in 12V/24V automotive power distribution networks where precise clamping, low leakage, and high IFSM robustness are required.
Technical Context
This TVS diode operates as a unidirectional clamp between power rail and ground, activating above 60.0V breakdown (min) to shunt transients up to 400W (10×1000μs waveform). Its glass-passivated junction ensures stable VBR over temperature and long-term reliability in harsh automotive environments.
Designed for ISO10605 ESD immunity (30kV air/contact discharge) and ISO7637-2 transient suppression, it delivers 4.6A peak pulse current capability with only 0.5μA reverse leakage at 54V VRWM - enabling low-power system monitoring without parasitic loading.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - handles ISO7637-2 Pulse 1 (-100V), Pulse 2a (+50V), Pulse 3a (-150V), Pulse 3b (+100V) without failure |
| Reverse Standoff Voltage | 54V - blocks normal 12V/24V automotive battery and alternator ripple while remaining inactive during steady-state operation |
| Breakdown Voltage (Min) | 60.0V - ensures reliable turn-on before downstream ICs (e.g., MCU power supplies) reach destructive overvoltage thresholds |
| Max Clamping Voltage | 87.1V @ 4.6A - limits transient voltage seen by protected load to safe margin below 100V-rated components |
| Reverse Leakage Current | 0.5μA @ 54V - negligible standby current draw, critical for always-on vehicle modules with strict quiescent power budgets |
| Peak Forward Surge Current | 40A @ 8.3ms half-sine - withstands repetitive load dump events per ISO7637-2 without degradation |
| AEC-Q101 Qualified | Yes - validated for automotive under-hood use with guaranteed operation from -55°C to +175°C junction temperature |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic UL 94V-0 housing, cathode band polarity indicator, 0.064g weight, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input reference node (connected to protected line) | Accepts transient energy during overvoltage; tied to power rail being protected (e.g., battery feed) |
| Cathode | Clamp output node (connected to ground) | Sinks surge current to chassis/system ground; must be low-inductance path for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power rating | Enables single-device protection against worst-case ISO7637-2 transients without parallel staging or derating |
| Glass passivated die construction | Ensures stable VBR and low leakage across -55°C to +175°C, eliminating parameter drift in engine bay environments |
| Lead-free, halogen-free "Green" finish | Complies with RoHS 3 (2015/863/EU) and automotive ELV directive; matte tin plating ensures MIL-STD-202 solderability |
| AEC-Q101 qualification & PPAP capability | Validated for production automotive use with full change control, IATF 16949 manufacturing, and traceable lot documentation |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) CAN Bus Protection |
|---|---|
Use Scenario: 12V battery feed to ECU microcontroller and sensor power rails exposed to load dump and jump-start surges. IC Role / Device Role: Primary unidirectional TVS clamp on main VBAT input, placed upstream of DC-DC converters and LDOs. Use Value: Limits transient voltage to ≤87.1V, protecting 100V-rated input capacitors and 5V/3.3V regulator ICs from catastrophic failure. |
Use Scenario: CAN_H/CAN_L lines in BCM subjected to ESD events during service and conducted noise from adjacent high-current circuits. IC Role / Device Role: Secondary protection device on CAN bus power supply pins (VCC_IO), not signal lines - suppresses supply rail transients before they couple into transceivers. Use Value: Prevents latch-up or reset of CAN transceivers (e.g., TJA1042) caused by >54V supply excursions during ISO10605 contact discharge. |
| ADAS Camera Power Supply | Electric Power Steering (EPS) Motor Driver Stage |
Use Scenario: 12V input to image sensor SoC and ISP in front-facing ADAS camera module mounted near radiator. IC Role / Device Role: First-line transient suppressor on main power entry, paired with ceramic filter capacitor and ferrite bead. Use Value: Maintains <0.5μA leakage to avoid degrading always-on wake-up circuitry while clamping ISO7637-2 Pulse 3b (+100V) to safe levels. |
Use Scenario: 24V supply rail feeding H-bridge gate drivers and current sense amplifiers in EPS motor control unit. IC Role / Device Role: High-energy clamp on pre-regulator input, absorbing load dump energy before buck converter stage. Use Value: Withstands 40A 8.3ms surge without parametric shift, preserving gate driver functionality during abrupt battery disconnect events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ54A-13-F | No AEC-Q101 qualification; standard industrial grade; identical electrical specs and package | Not approved for automotive production; suitable only for non-safety-critical prototypes or aftermarket modules | Select only if AEC-Q101 compliance is not required and cost is prioritized over qualification traceability |
| SMCJ54A-Q | Higher 1500W peak power; SMC (DO-214AB) package; same 54V VRWM and AEC-Q101 rating | Used where higher surge margin is needed (e.g., alternator output lines); larger footprint and thermal mass | Choose when system-level testing shows 400W insufficient for worst-case load dump; requires PCB layout revision |
Compared with SMAJ54A-13-F, the AQ variant adds mandatory AEC-Q101 test reporting and PPAP documentation; versus SMCJ54A-Q, it trades surge capacity for space-constrained placement in tight ECU power sections.
Availability
SMAJ54AQ-13-F is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera power supplies, and electric power steering systems requiring stable component supply with full automotive qualification traceability.
Supply support for SMAJ54AQ-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 with IATF 16949-certified facilities.
The SMAJ(AQ) series is part of Diodes' AEC-Q101-qualified TVS portfolio designed specifically for ISO7637-2 and ISO10605 compliance in automotive power line and interface protection applications.
FAQ
What is the maximum operating junction temperature for SMAJ54AQ-13-F?
The device is rated for continuous operation from -55°C to +175°C junction temperature. This range is validated per AEC-Q101 stress tests and enables direct mounting on high-temperature PCB areas near engine control units or power inverters without thermal derating.
Does SMAJ54AQ-13-F require a heatsink for 400W pulse handling?
No heatsink is required for single-pulse 400W events (10×1000μs waveform), as energy dissipation occurs in milliseconds. However, PCB copper area ≥40mm² per pad is recommended to maintain thermal stability during repetitive surges per ISO7637-2 test profiles.
Can SMAJ54AQ-13-F be used on CAN signal lines?
No - it is a unidirectional power-rail TVS, not a bidirectional signal-line protector. For CAN_H/CAN_L differential pair protection, use dedicated low-capacitance bidirectional TVS arrays (e.g., D3V3F4U2UP-7) to avoid signal integrity degradation.
How does the "AQ" suffix differ from "A" in Diodes' SMAJ series?
The "AQ" suffix denotes AEC-Q101 qualification, PPAP capability, and manufacturing in IATF 16949-certified facilities - including full test reports, lot traceability, and controlled change management - whereas "A" indicates industrial-grade parts without automotive validation.
SMAJ54AQ-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):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 4.6A
- 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
SMAJ54AQ-13-F FAQ
1.How can I place an order for SMAJ54AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ54AQ-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 SMAJ54AQ-13-F reliable?
The price and inventory of SMAJ54AQ-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 SMAJ54AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ54AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ54AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ54AQ-13-F?
SMAJ54AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ54AQ-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 SMAJ54AQ-13-F?
For technical support, including SMAJ54AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ54AQ-13-F requirements.
6.How does Aetrix verify that SMAJ54AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ54AQ-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 SMAJ54AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ54AQ-13-F?
All SMAJ54AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ54AQ-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 SMAJ54AQ-13-F part is unused and in its original packaging.
Return procedure for SMAJ54AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ54AQ-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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Diodes Incorporated
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