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Diodes Incorporated SMAJ54A-13-F
- Part No.:
- SMAJ54A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ54A-13-F.pdf
- Description:
- TVS DIODE 54VWM 87.1VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:1,498
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Product details
Overview
SMAJ54A-13-F from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode with 54V reverse standoff voltage, 60.0–66.3V breakdown range at 1mA, 87.1V max clamping voltage at 4.6A peak pulse current, and SMA package. It protects automotive power supply lines, industrial I/O ports, and DC power rails against ESD, lightning-induced surges, and inductive switching transients.
For engineers reviewing the SMAJ54A-13-F datasheet, SMAJ54A-13-F pinout, SMAJ54A-13-F application, or SMAJ54A-13-F equivalent, key selection criteria include clamping voltage margin relative to system rail, peak pulse current capability under 8.3ms waveform, thermal derating above +25°C ambient, and compatibility with automated SMT assembly using RoHS-compliant reflow profiles.
Technical Context
This TVS diode operates as a shunt-clamping protection device triggered by voltage exceeding its breakdown threshold. Its glass-passivated junction ensures stable VBR and low leakage (<5µA @ 54V), while fast response time (<1.0ps) enables suppression of sub-nanosecond ESD events per IEC 61000-4-2 Level 4.
The device complies with AEC-Q101 for automotive-grade reliability and is rated for continuous operation from –55°C to +150°C junction temperature. Its 1.0W steady-state power dissipation at TL = +75°C supports use in thermally constrained PCB layouts without forced airflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 8.3ms half-sine surge without failure; derates linearly above +25°C ambient |
| Reverse Standoff Voltage (VRWM) | 54V - maximum continuous DC or RMS voltage before significant leakage; sets minimum operating rail margin |
| Breakdown Voltage (VBR) | 60.0–66.3V @ 1mA - defines precise conduction onset; tight 10.5% tolerance ensures predictable clamping onset |
| Max Clamping Voltage (VC) | 87.1V @ IPP = 4.6A - limits protected circuit voltage during worst-case surge; 61% overvoltage margin vs. 54V rail |
| Peak Pulse Current (IPP) | 4.6A - peak current handled at VC; correlates directly to surge energy (E ≈ ½ × VC × IPP × t) |
| Junction Temperature Range | –55°C to +150°C - enables deployment in under-hood automotive, industrial motor drives, and outdoor power systems |
| Package | SMA (DO-214AC) - industry-standard 2-pin SMT outline; 4.0–4.6mm body width fits 1.96–2.40mm pad pitch designs |
Pinout & Package
SMA (DO-214AC) surface-mount package with molded plastic case (UL 94V-0), cathode band marking for polarity identification, and matte tin-plated terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during clamping | Connected to protected line; conducts surge current to ground when VAK > VBR |
| Cathode | Reference terminal / voltage sense node | Connected to system ground or lower-potential rail; establishes clamping reference point |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power rating | Enables robust protection against 10/1000µs lightning surges up to 400W without degradation |
| Glass passivated die construction | Ensures stable VBR and low leakage across temperature and lifetime; eliminates moisture sensitivity risks |
| Lead-free, halogen-free, RoHS 3 compliant | Meets IPC-J-STD-020 moisture sensitivity Level 1 and automotive green manufacturing requirements |
| Fast response time (<1.0ps) | Clamps ESD events (IEC 61000-4-2 ±8kV contact) before downstream ICs experience overstress |
| –55°C to +150°C operating range | Supports direct placement on engine control units, battery management systems, and industrial PLC I/O modules |
Applications
| Automotive Power Distribution | Industrial Sensor Interface |
|---|---|
Use Scenario: 12V battery rail protection in body control modules against load dump and alternator transients. IC Role / Device Role / Timing Role: Shunt-clamping TVS placed between battery input and LDO/regulator input. Use Value: Limits voltage to ≤87.1V during 100V/40ms load dump, preventing regulator overvoltage shutdown and MCU brownout. |
Use Scenario: 24V analog sensor signal line (e.g., pressure, temperature) exposed to field wiring in factory automation. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; unidirectional SMAJ54A-13-F used with series resistor for signal line clamping to 24V rail. Use Value: Clamps induced surges from relay coil flyback or nearby motor switching to safe levels below ADC input absolute max rating. |
| DC Power Supply Input | Telecom Equipment Protection |
Use Scenario: Input stage of 48V telecom power supply subjected to lightning-induced surges on AC/DC front-end. IC Role / Device Role / Timing Role: Primary-level TVS placed after EMI filter but before bridge rectifier and bulk capacitor. Use Value: Absorbs 400W surge energy without failure, maintaining system uptime during Category B/C lightning events per IEC 61000-4-5. |
Use Scenario: Protection of PoE-powered Ethernet port (IEEE 802.3af/at) against cable discharge events and accidental AC mains contact. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to mid-point bias rail in isolated DC/DC converter output stage. Use Value: Limits common-mode surge voltage to <87.1V, preserving isolation barrier integrity and preventing PHY IC latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ54A-E3/5A (Vishay) | Same 54V VRWM, 87.1V VC, SMA package; ±5% VBR tolerance vs. Diodes' ±5.5% | Qualified to AEC-Q101 Grade 0 (–40°C to +150°C); wider temp range than SMAJ54A-13-F's Grade 1 rating | Select for extended temperature automotive applications requiring Grade 0 qualification |
| P6SMB54A (ON Semiconductor) | Identical electrical specs (54V/87.1V/400W); same SMA footprint but slightly different thermal resistance (RθJA = 120°C/W vs. 110°C/W) | Higher RθJA reduces sustained surge capability in high-ambient environments (>85°C) | Prefer SMAJ54A-13-F where board-level thermal management is limited or ambient exceeds 85°C |
Compared with SMAJ54A-E3/5A, SMAJ54A-13-F offers tighter VBR distribution and lower RθJA, while P6SMB54A requires additional thermal design margin due to higher junction-to-ambient resistance.
Availability
SMAJ54A-13-F is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface, and DC power supply input applications requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for SMAJ54A-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
This device belongs to Diodes' SMAJ series of high-power TVS diodes engineered specifically for automotive, industrial, and telecom surge immunity compliance-designed to meet IEC 61000-4-2/4-5 and ISO 16750-2 requirements.
FAQ
What is the maximum clamping voltage of SMAJ54A-13-F at its rated peak pulse current?
The maximum clamping voltage (VC) is 87.1V measured at IPP = 4.6A using an 8.3ms half-sine waveform. This value is guaranteed across the full operating temperature range (–55°C to +150°C) and represents the upper limit of voltage seen by downstream circuitry during a worst-case surge event.
Is SMAJ54A-13-F qualified for automotive applications?
SMAJ54A-13-F meets AEC-Q101 stress test requirements for discrete semiconductors and is manufactured in IATF 16949-certified facilities. While not explicitly labeled "automotive grade" in its part number, it is functionally identical to the AEC-Q101-qualified SMAJ54AQ variant and widely deployed in body control modules and powertrain subsystems.
How does the SMA package affect thermal performance in high-density PCB layouts?
The SMA (DO-214AC) package has a junction-to-ambient thermal resistance (RθJA) of 110°C/W under standard JEDEC conditions. With 1.0W steady-state dissipation at TL = +75°C, it requires ≥25mm² of 1oz copper pour connected to both pads to maintain safe junction temperatures in compact layouts.
Can SMAJ54A-13-F be used for bidirectional transient suppression?
No-SMAJ54A-13-F is unidirectional only, indicated by the absence of "C" suffix. For bidirectional protection at 54V standoff, the correct part is SMAJ54CA-13-F, which features symmetrical clamping in both polarities and no cathode band marking.
SMAJ54A-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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
SMAJ54A-13-F FAQ
1.How can I place an order for SMAJ54A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ54A-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 SMAJ54A-13-F reliable?
The price and inventory of SMAJ54A-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 SMAJ54A-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ54A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ54A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ54A-13-F?
SMAJ54A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ54A-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 SMAJ54A-13-F?
For technical support, including SMAJ54A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ54A-13-F requirements.
6.How does Aetrix verify that SMAJ54A-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ54A-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 SMAJ54A-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ54A-13-F?
All SMAJ54A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ54A-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 SMAJ54A-13-F part is unused and in its original packaging.
Return procedure for SMAJ54A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ54A-13-F Tags
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