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Diodes Incorporated SMAJ54CA-13-F
- Part No.:
- SMAJ54CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ54CA-13-F.pdf
- Description:
- TVS DIODE 54VWM 87.1VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:4,066
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Product details
Overview
SMAJ54CA-13-F from Diodes Incorporated is a bidirectional 400W transient voltage suppressor (TVS) diode in SMA package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 54V reverse standoff voltage (VRWM), 60–66.3V breakdown range (VBR), 87.1V max clamping voltage (VC) at 4.6A peak pulse current (IPP), and operates from –55°C to +150°C - deployed in automotive infotainment power inputs and industrial sensor interfaces.
For engineers reviewing the SMAJ54CA-13-F datasheet, SMAJ54CA-13-F pinout, SMAJ54CA-13-F application, or SMAJ54CA-13-F equivalent, key selection criteria include clamping voltage margin vs. protected IC VCC rating, unidirectional/bidirectional polarity match, IEC 61000-4-2/4-5 surge compliance, and thermal derating above +25°C ambient.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<5µA at VRWM), while the 1.0ms 10/1000µs waveform response supports IEC 61000-4-5 Level 4 surge immunity.
The device delivers 400W peak pulse power within a compact SMA surface-mount package, with thermal resistance (RθJA) optimized for PCB copper pour dissipation. Clamping performance is validated at 1.0mA test current (IT), and steady-state power dissipation is rated at 1.0W at TL = +75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 10/1000µs surges up to 4.6A without failure |
| Reverse Standoff Voltage | 54V - maximum continuous DC or RMS voltage before significant leakage |
| Breakdown Voltage Range | 60.0–66.3V @ IT = 1.0mA - defines reliable conduction onset under transient stress |
| Max Clamping Voltage | 87.1V @ IPP = 4.6A - limits protected circuit voltage during worst-case surge |
| Peak Pulse Current | 4.6A - maximum non-repetitive surge current the device safely clamps |
| Operating Temperature | –55°C to +150°C - qualified for under-hood automotive and industrial environments |
| Package | SMA (DO-214AC) - industry-standard 2-pin SMT footprint with cathode band omitted for bidirectional symmetry |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case per UL 94V-0, 0.064g weight, moisture sensitivity level 1 (J-STD-020). Bidirectional construction eliminates polarity marking; terminals are matte tin-plated for RoHS-compliant soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Identical terminal behavior in both directions - no functional distinction between pins |
| Case | Thermal and mechanical interface | Non-electrical; serves as heat sink anchor and PCB mounting surface only |
Key Features
| Feature | Design Value |
|---|---|
| 400W Peak Pulse Power | Enables robust protection against IEC 61000-4-5 4kV surge events on 24V/48V industrial buses |
| Glass Passivated Junction | Ensures stable VBR and low leakage drift over temperature and lifetime (>1000 cycles) |
| Bidirectional Symmetry | Eliminates need for polarity-aware layout - simplifies routing on differential or AC-coupled lines |
| RoHS & Halogen-Free | Meets automotive green standards (Br+Cl <1500ppm, Sb <1000ppm) for Tier 1 supply chain compliance |
Applications
| Automotive Infotainment Power Input | Industrial CAN Bus Transceiver Protection |
|---|---|
Use Scenario: 12V battery-supplied head unit exposed to load dump (ISO 7637-2 Pulse 5a) and ESD events. IC Role / Device Role: Primary clamping element placed upstream of DC-DC converter input. Use Value: Limits transient voltage to ≤87.1V, protecting downstream LDOs and PMICs rated for 60V absolute max. |
Use Scenario: CAN_H/CAN_L lines in factory automation nodes subject to cable discharge and ground bounce. IC Role / Device Role: Bidirectional TVS pair across differential bus to suppress common-mode transients. Use Value: Maintains signal integrity by clamping ±87.1V surges without polarity bias, preserving CAN FD timing margins. |
| Smart Meter AC Mains Interface | 4–20mA Loop-Powered Sensor Input |
Use Scenario: Secondary-side protection of meter MCU after isolation transformer and rectifier. IC Role / Device Role: Final-stage clamp on 5V/3.3V rail feeding metrology ASIC and RTC. Use Value: Withstands 10/1000µs surges up to 400W while adding <1pF parasitic capacitance - no signal distortion. |
Use Scenario: Field-side analog input protection in hazardous-area transmitters with intrinsic safety barriers. IC Role / Device Role: Low-leakage (≤5µA) clamp on loop-powered 4–20mA signal path. Use Value: Prevents barrier saturation during ESD events while maintaining loop accuracy within ±0.1% full scale. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ54CA from Vishay (SMAJ54CA-E3/54) | Same VRWM (54V), VC = 87.1V, but higher IR (10µA vs. 5µA) and no AEC-Q200 qualification | Not approved for automotive PPAP; suitable for commercial-grade industrial use only | Select when cost sensitivity outweighs automotive traceability requirements |
| P6SMB54CA from ON Semiconductor | Higher PPK (600W), same VRWM/VC, but larger SMB package (4.6 × 3.9mm vs. SMA 4.6 × 2.9mm) | Requires PCB area increase; better thermal handling for repetitive surges | Select when board space permits and multi-pulse surge endurance is critical |
Compared with SMAJ54CA-13-F, the Vishay part trades automotive compliance for lower cost, while the ON Semiconductor part trades compactness for higher surge capacity - choice depends on priority: space-constrained automotive (original), cost-driven industrial (Vishay), or high-repetition surge resilience (ON).
Availability
SMAJ54CA-13-F is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial CAN networks, and smart metering platforms requiring stable component supply across extended product lifecycles.
Supply support for SMAJ54CA-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 integrated circuits, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
This device belongs to Diodes' SMAJ series of surface-mount TVS diodes, engineered specifically for high-reliability transient suppression in automotive, industrial, and communications infrastructure where compact size, AEC-Q200 readiness, and precise clamping are essential.
FAQ
What does the "C" suffix in SMAJ54CA-13-F indicate?
The "C" denotes bidirectional configuration: both terminals behave identically under positive and negative transients, eliminating polarity concerns in AC or differential signal protection. Unlike unidirectional variants (e.g., SMAJ54A), it has no cathode band marking and clamps symmetrically around 0V.
Can SMAJ54CA-13-F be used in place of a unidirectional TVS like SMAJ54A?
No - SMAJ54CA-13-F is strictly bidirectional and unsuitable for DC-biased rails requiring asymmetric clamping (e.g., 5V logic lines referenced to ground). Substitution would allow reverse conduction during normal operation, risking latch-up or excessive leakage. Always match polarity type to circuit topology.
What is the thermal derating behavior above +25°C ambient?
Per Figure 1 in DS19005, peak pulse power linearly derates to ~75% at +75°C and ~50% at +125°C. For sustained surge duty, PCB copper area and airflow must be verified using the 1.0W steady-state power limit at TL = +75°C and the RθJA implied by the SMA package outline.
Is SMAJ54CA-13-F qualified to AEC-Q200?
No - the standard SMAJ54CA-13-F is not AEC-Q200 qualified. Diodes offers an automotive-compliant variant under separate datasheet: SMAJ54CAQ-13-F (with PPAP capability, IATF 16949 manufacturing, and full AEC-Q200 stress testing). Use only the "Q" suffix version for automotive production.
SMAJ54CA-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:
- -
- Bidirectional Channels:
- 1
- 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
SMAJ54CA-13-F FAQ
1.How can I place an order for SMAJ54CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ54CA-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 SMAJ54CA-13-F reliable?
The price and inventory of SMAJ54CA-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 SMAJ54CA-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ54CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ54CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ54CA-13-F?
SMAJ54CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ54CA-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 SMAJ54CA-13-F?
For technical support, including SMAJ54CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ54CA-13-F requirements.
6.How does Aetrix verify that SMAJ54CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ54CA-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 SMAJ54CA-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ54CA-13-F?
All SMAJ54CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ54CA-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 SMAJ54CA-13-F part is unused and in its original packaging.
Return procedure for SMAJ54CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ54CA-13-F Tags
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ESD9B5.0ST5G
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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