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Diodes Incorporated P4SMAJ48ADF-13
- Part No.:
- P4SMAJ48ADF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
P4SMAJ48ADF-13.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR D-F
- Quantity:
- Payment:
- Shipping:
Inventory:4,674
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Product details
Overview
P4SMAJ48ADF-13 from Diodes Incorporated is a 400W surface-mount transient voltage suppressor (TVS) diode designed for unidirectional overvoltage protection in DC power rails and signal lines. It features a reverse standoff voltage of 48 V, clamps transients to ≤77.4 V at 5.2 A peak pulse current, and delivers IEC 61000-4-2 ESD immunity of ±30 kV (air/contact). It is deployed in industrial power supplies and automotive body control modules to safeguard microcontrollers and interface ICs.
For engineers reviewing the P4SMAJ48ADF-13 datasheet, P4SMAJ48ADF-13 pinout, P4SMAJ48ADF-13 application, or P4SMAJ48ADF-13 equivalent, this page provides verified electrical parameters, D-FLAT package layout guidance, clamping performance under 10/1000 µs surge, thermal resistance data, and RoHS-compliant sourcing details - all critical for surge protection design validation and BOM qualification.
Technical Context
This unidirectional TVS diode operates as a shunt-clamping device, conducting when reverse voltage exceeds its 48 V standoff threshold to divert surge energy away from protected circuitry. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1 µA at VRWM), while the D-FLAT package enables high-current handling with minimal board footprint.
It complies with IEC 61000-4-2 Level 4 ESD immunity and withstands 40 A non-repetitive forward surge (8.3 ms half-sine). Thermal resistance is 37 °C/W (junction-to-terminal) on standard FR-4 PCBs, supporting reliable operation up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W - Sustains single 10×1000 µs transients without failure in typical PCB layouts. |
| Reverse Standoff Voltage (VRWM) | 48 V - Maximum continuous DC operating voltage before clamping initiates. |
| Breakdown Voltage (VBR) | 53.3–58.9 V @ 1 mA - Confirmed avalanche onset range for predictable turn-on margin. |
| Clamping Voltage (VC) | ≤77.4 V @ 5.2 A - Limits downstream voltage stress during surge events per IEC 61000-4-5. |
| ESD Rating | ±30 kV air / ±30 kV contact - Meets IEC 61000-4-2 Level 4 for system-level ESD robustness. |
| Junction Temperature Range | −55 °C to +150 °C - Supports deployment in under-hood automotive and industrial environments. |
| Thermal Resistance (RθJT) | 37 °C/W - Enables thermal management on 1"×1", 2 oz copper pads per datasheet test condition. |
Pinout & Package
Package: D-FLAT (low-profile surface-mount plastic case, UL 94V-0 rated, 0.035 g weight). Cathode indicated by band on top surface. Terminals are matte tin annealed over copper leadframe, solderable per MIL-STD-202.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Surge Current Sink | Connected to protected line; conducts during overvoltage to shunt current to ground. |
| 2 (Anode) | Reference / Ground Return | Typically tied to system ground or low-impedance return path for effective clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress. |
| Low-profile D-FLAT package | Reduces board area by >40% vs. SMA packages while maintaining 400 W surge rating. |
| IEC 61000-4-2 ESD immunity | ±30 kV air/contact - Eliminates need for external ESD diodes in many interface designs. |
| Lead-free, halogen-free, RoHS 3 compliant | Meets EU Directive 2015/863 with <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - "Green" certified. |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protects 48 V DC input rails in programmable logic controllers against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between input rail and chassis ground. Use Value: Clamps 10/1000 µs surges to ≤77.4 V, preventing damage to upstream DC-DC controllers and downstream PMICs. |
Use Scenario: Safeguards LIN bus transceivers and microcontroller I/O pins from battery voltage transients during ignition. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply line feeding BCM sub-circuits. Use Value: Withstands 40 A 8.3 ms surge (load dump) while maintaining <1 µA leakage at 48 V system standby. |
| Telecom DC Feeder Protection | Smart Meter Power Input Stage |
Use Scenario: Shields PoE-powered remote units from induced lightning surges on 48 V DC feed lines. IC Role / Device Role / Timing Role: Primary surge clamp on secondary-side DC distribution bus. Use Value: 400 W peak power rating handles multi-kV induced transients without thermal runaway on FR-4 boards. |
Use Scenario: Secures meter MCU supply against grid switching transients and neutral-ground faults. IC Role / Device Role / Timing Role: Standoff-rated TVS on AC-DC converter output (48 V nominal). Use Value: −55 °C to +150 °C operating range ensures functionality in outdoor meter enclosures across global climates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48A (Bourns) | Same 48 V VRWM and 77.4 V VC, but SMB package (larger footprint, RθJA = 65 °C/W vs. 114 °C/W). | Preferred where higher thermal mass is needed; less suitable for ultra-dense layouts. | Select if board space allows larger package and higher steady-state power dissipation is required. |
| 1.5SMC48A (ON Semiconductor) | Same electrical specs but SMC package (5.3 mm × 5.3 mm); 1.5 kW rating but derated to 400 W at TA > 25 °C. | Better for high-volume cost-sensitive designs; requires larger pad layout and different reflow profile. | Choose when legacy SMC footprint compatibility is mandatory and thermal margin is available. |
Compared with SMBJ48A and 1.5SMC48A, P4SMAJ48ADF-13 offers superior board-space efficiency (D-FLAT: 2.6 mm × 4.3 mm), lower thermal resistance in compact layouts, and tighter VBR tolerance (53.3–58.9 V), making it optimal for space-constrained industrial and automotive modules.
Availability
P4SMAJ48ADF-13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom DC feeder systems, and smart meter power input stages requiring stable component supply, full traceability, and RoHS 3 compliance.
Supply support for P4SMAJ48ADF-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, specializing in high-reliability protection, power management, and signal integrity solutions for industrial, automotive, and computing markets.
P4SMAJ48ADF-13 belongs to the P4SMAJ series of 400 W surface-mount TVS diodes, engineered specifically for compact, high-efficiency transient suppression in DC power distribution networks where board space and thermal performance are critical.
FAQ
What is the maximum clamping voltage of P4SMAJ48ADF-13 under surge conditions?
The maximum clamping voltage (VC) is 77.4 V at 5.2 A peak pulse current, measured using the standardized 10 × 1000 µs waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range and reflects worst-case device behavior under surge stress.
Does P4SMAJ48ADF-13 support automated optical inspection (AOI) after reflow?
Yes - its D-FLAT package features a flat, coplanar terminal geometry and cathode band marking visible under standard AOI lighting. The matte tin finish provides consistent reflectivity, and the 0.035 g weight minimizes tombstoning risk during reflow, enabling reliable detection of solder joint integrity and polarity orientation.
Can P4SMAJ48ADF-13 be used in bidirectional configurations?
No - it is a unidirectional TVS diode with anode/cathode polarity. For bidirectional protection, two devices must be connected in series opposing configuration, or a dedicated bidirectional part like P4SMAJ48CA-13 should be selected. Using a single unidirectional device in reverse bias risks permanent breakdown.
What is the moisture sensitivity level (MSL) for P4SMAJ48ADF-13?
P4SMAJ48ADF-13 has MSL Level 1 per J-STD-020, meaning it is not moisture-sensitive and may be stored indefinitely at ambient conditions without baking prior to assembly. This eliminates floor-life constraints and simplifies manufacturing logistics for high-mix production environments.
P4SMAJ48ADF-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):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 5.2A
- 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
P4SMAJ48ADF-13 FAQ
1.How can I place an order for P4SMAJ48ADF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMAJ48ADF-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 P4SMAJ48ADF-13 reliable?
The price and inventory of P4SMAJ48ADF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMAJ48ADF-13 is usually 5 days.
3.What payment methods are accepted for P4SMAJ48ADF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMAJ48ADF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMAJ48ADF-13?
P4SMAJ48ADF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMAJ48ADF-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 P4SMAJ48ADF-13?
For technical support, including P4SMAJ48ADF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMAJ48ADF-13 requirements.
6.How does Aetrix verify that P4SMAJ48ADF-13 is sourced from the original manufacturer or authorized distributors?
All P4SMAJ48ADF-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 P4SMAJ48ADF-13 meets industry standards.
7.What is the process for return or replacement of P4SMAJ48ADF-13?
All P4SMAJ48ADF-13 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMAJ48ADF-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 P4SMAJ48ADF-13 part is unused and in its original packaging.
Return procedure for P4SMAJ48ADF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMAJ48ADF-13 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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Diodes Incorporated
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