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Diodes Incorporated P4SMAJ43ADF-13
- Part No.:
- P4SMAJ43ADF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
P4SMAJ43ADF-13.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR D-F
- Quantity:
- Payment:
- Shipping:
Inventory:9,751
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Product details
Overview
P4SMAJ43ADF-13 from Diodes Incorporated is a 400W surface-mount transient voltage suppressor (TVS) diode designed for unidirectional overvoltage protection in DC power lines and signal interfaces. It features a reverse standoff voltage of 43V, clamping voltage of 69.4V at 5.7A peak pulse current, and IEC 61000-4-2 ESD rating of ±30kV (air/contact). Used in industrial power supplies and automotive body control modules to safeguard microcontrollers and communication ICs.
For engineers reviewing the P4SMAJ43ADF-13 datasheet, P4SMAJ43ADF-13 pinout, P4SMAJ43ADF-13 application, or P4SMAJ43ADF-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, peak pulse current capability under 10/1000µs waveform, thermal resistance on FR-4 PCB, and D-FLAT package compatibility with high-density layouts.
Technical Context
This TVS operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds 47.8V (min breakdown), limiting transient energy by shunting surge current to ground. Its glass-passivated die ensures stable leakage (<1µA at 43V) and repeatable clamping performance across temperature.
Designed for single-pulse transients per IEC 61000-4-5 (10×1000µs), it delivers 400W peak pulse power at 25°C ambient, derating linearly above that point. Thermal resistance junction-to-terminal is 37°C/W on standard FR-4 (1"×1", 2oz copper), enabling reliable operation up to +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - Sustains single 10×1000µs surges without failure under specified mounting conditions |
| Reverse Standoff Voltage | 43V - Maximum continuous DC operating voltage before significant leakage begins |
| Breakdown Voltage | 47.8–52.8V @ 1mA - Confirmed avalanche initiation range for predictable turn-on timing |
| Clamping Voltage | 69.4V @ 5.7A - Maximum voltage seen by protected circuit during rated surge event |
| ESD Rating | ±30kV air / ±30kV contact - Meets IEC 61000-4-2 Level 4 for system-level ESD immunity |
| Junction Temperature Range | −55°C to +150°C - Validated operation across extended industrial and automotive environments |
Pinout & Package
Package: D-FLAT (low-profile surface-mount plastic case, UL 94V-0 rated, 0.035g weight). Cathode indicated by band; terminals are anode (pin 1) and cathode (pin 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Input/Line side terminal | Connected to protected line (e.g., 48V rail); carries surge current into device during clamping |
| 2 (Cathode) | Ground reference terminal | Connected to system ground plane; completes low-inductance path for transient energy dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Ensures long-term stability of breakdown voltage and leakage current under thermal cycling and humidity stress |
| Low-profile D-FLAT package | Reduces board space by >40% vs. SMA; enables routing under adjacent components in dense power modules |
| Lead-free, halogen-free, RoHS 3 compliant | Meets IPC-J-STD-020 moisture sensitivity level 1 and global environmental compliance mandates |
| High ESD robustness | Withstands ≥30kV contact discharge without parametric shift-critical for field-deployed industrial HMI interfaces |
Applications
| Industrial Power Input Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 48V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role: Unidirectional TVS placed between input rail and chassis ground to clamp transients before upstream DC-DC converter. Use Value: Clamps 400W surges to ≤69.4V, preserving 75V-rated input capacitors and preventing MOSFET gate oxide damage. |
Use Scenario: LIN bus line protection in door module ECU subjected to battery disconnect spikes and ESD events. IC Role / Device Role: TVS connected between LIN data line and ground to suppress fast transients while maintaining <10pF capacitance. Use Value: 69.4V clamping prevents LIN transceiver latch-up; 1µA leakage at 43V avoids false wake-up in sleep mode. |
| Telecom Remote Radio Unit | Medical Diagnostic Equipment Power Entry |
Use Scenario: −48V DC feed line in 5G remote radio head exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role: Primary protection device mounted at PCB edge, coordinated with downstream GDT and MOV stages. Use Value: 5.7A peak pulse current rating supports coordination with 10kA external protectors; D-FLAT footprint allows compact layout near connector. |
Use Scenario: AC/DC adapter output stage feeding imaging sensor subsystem requiring ultra-low noise and high reliability. IC Role / Device Role: Final-stage TVS on regulated 12V rail protecting CMOS image sensor interface and ADC reference. Use Value: 43V standoff avoids conduction during normal operation; 69.4V clamping stays below sensor absolute max rating of 70V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | Same 43V standoff, but SMB package (higher RθJA = 125°C/W) and 600W rating | Less suitable for ultra-thin PCBs; better for higher-energy surges where board space permits | Select when peak pulse energy exceeds 400W and thermal mass allows larger footprint |
| 1.5SMC43A | Same 43V standoff, DO-214AB package, 1500W rating, higher clamping (70.1V) | Requires more board area; used where coordination with upstream protectors demands higher let-through voltage | Choose when system-level surge testing requires >600W handling and clamping margin allows 70.1V |
Compared with SMBJ43A and 1.5SMC43A, P4SMAJ43ADF-13 offers optimal balance of low profile (D-FLAT), precise 69.4V clamping, and 400W capability-ideal for space-constrained industrial and automotive modules where thermal management is limited to 1"×1" copper pads.
Availability
P4SMAJ43ADF-13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control units, telecom remote radio units, and medical diagnostic equipment requiring stable component supply and full RoHS 3 compliance.
Supply support for P4SMAJ43ADF-13 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 and manufacturing operations across Asia and the Americas.
P4SMAJ43ADF-13 belongs to the P4SMAJ series of surface-mount TVS diodes engineered specifically for high-reliability transient suppression in industrial automation, automotive electronics, and communications infrastructure.
FAQ
What is the maximum clamping voltage of P4SMAJ43ADF-13 under standard test conditions?
The maximum clamping voltage is 69.4V measured at 5.7A peak pulse current using the 10×1000µs waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range (−55°C to +150°C) and reflects worst-case device behavior under surge conditions.
Does P4SMAJ43ADF-13 meet automotive qualification standards?
P4SMAJ43ADF-13 is not AEC-Q200 qualified; it is a standard-grade TVS intended for industrial and commercial applications. For automotive use, Diodes Incorporated offers the AEC-Q200 qualified P4SMAJ43A-Q series with identical electrical specs and enhanced reliability screening.
How does the D-FLAT package affect thermal performance compared to SMA?
The D-FLAT package provides lower junction-to-terminal thermal resistance (37°C/W) than standard SMA packages (~50°C/W), due to its flat, wide copper leadframe. When mounted on a 1"×1", 2oz FR-4 pad, this enables higher sustained power dissipation and improved reliability in thermally constrained designs.
Can P4SMAJ43ADF-13 be used in bidirectional configurations?
No-P4SMAJ43ADF-13 is a unidirectional TVS diode with cathode band marking. Bidirectional protection requires either two devices in series opposition or a dedicated bidirectional part such as P4SMAJ43CA, which has symmetrical clamping in both polarities.
P4SMAJ43ADF-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 2-SMD, Flat Leads
- Series:
- P4SMAJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 5.7A
- 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:
- D-Flat
P4SMAJ43ADF-13 FAQ
1.How can I place an order for P4SMAJ43ADF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMAJ43ADF-13 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 P4SMAJ43ADF-13 reliable?
The price and inventory of P4SMAJ43ADF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMAJ43ADF-13 is usually 5 days.
3.What payment methods are accepted for P4SMAJ43ADF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMAJ43ADF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMAJ43ADF-13?
P4SMAJ43ADF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMAJ43ADF-13 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 P4SMAJ43ADF-13?
For technical support, including P4SMAJ43ADF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMAJ43ADF-13 requirements.
6.How does Aetrix verify that P4SMAJ43ADF-13 is sourced from the original manufacturer or authorized distributors?
All P4SMAJ43ADF-13 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 P4SMAJ43ADF-13 meets industry standards.
7.What is the process for return or replacement of P4SMAJ43ADF-13?
All P4SMAJ43ADF-13 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMAJ43ADF-13, 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 P4SMAJ43ADF-13 part is unused and in its original packaging.
Return procedure for P4SMAJ43ADF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMAJ43ADF-13 Tags
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