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Diodes Incorporated P4SMAJ40ADF-13
- Part No.:
- P4SMAJ40ADF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
P4SMAJ40ADF-13.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR D-F
- Quantity:
- Payment:
- Shipping:
Inventory:6,879
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Product details
Overview
P4SMAJ40ADF-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 40 V, clamping voltage of 64.5 V at 6.2 A peak pulse current, and IEC 61000-4-2 ESD rating of ±30 kV (air/contact). Used in industrial power supplies and automotive body electronics to protect downstream ICs from lightning-induced surges and ESD events.
For engineers reviewing the P4SMAJ40ADF-13 datasheet, P4SMAJ40ADF-13 pinout, P4SMAJ40ADF-13 application, or P4SMAJ40ADF-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, thermal resistance under PCB layout constraints, peak pulse current capability for system-level surge immunity, and D-FLAT package compatibility with high-density routing.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt device triggered above its breakdown voltage (44.4–49.1 V), diverting transient energy to ground while limiting voltage across protected circuitry. Its glass-passivated junction ensures stable leakage (<1 µA at 40 V) and repeatable clamping performance across temperature.
The D-FLAT package provides low thermal resistance (37 °C/W junction-to-terminal on FR-4 with 1"×1" 2 oz copper pad), enabling reliable power dissipation during 10/1000 µs transients. Polarity is marked by a cathode band; anode connects to protected line, cathode to ground reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W - Sustains single 10/1000 µs surge without failure under defined thermal conditions. |
| Reverse Standoff Voltage (VRWM) | 40 V - Maximum continuous DC operating voltage before significant leakage begins. |
| Breakdown Voltage (VBR) | 44.4–49.1 V @ 1 mA - Confirmed avalanche initiation range; defines minimum trigger threshold. |
| Clamping Voltage (VC) | 64.5 V @ 6.2 A IPP - Maximum voltage seen by protected circuit during worst-case transient. |
| ESD Rating | ±30 kV (IEC 61000-4-2, air & contact) - Validated immunity level for human-body-model discharge events. |
| Junction-to-Ambient RθJA | 114 °C/W (FR-4, 1"×1", 2 oz) - Thermal limit for ambient temperature derating per Figure 1. |
Pinout & Package
Package: D-FLAT - Low-profile surface-mount plastic case (2.25–2.95 mm width, 3.95–4.60 mm length, 0.90–1.10 mm height), UL 94V-0 rated, with matte tin-plated copper leadframe and cathode band polarity indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Transient return path | Connected to system ground; carries full surge current during clamping event. |
| 2 (Anode) | Protected line input | Connected to line being safeguarded (e.g., 24 V rail, CAN_H); voltage referenced to cathode. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Ensures long-term stability of breakdown voltage and leakage current under humidity and thermal cycling. |
| Low-profile D-FLAT package | Reduces board space by >30% vs. SMA; enables routing under adjacent components in dense layouts. |
| 400 W peak pulse rating | Supports Level 4 IEC 61000-4-5 surge immunity (2 Ω source impedance, 1.2/50 µs + 8/20 µs combo wave). |
| ±30 kV ESD robustness | Eliminates need for secondary ESD protection on front-end connectors in industrial HMI and sensor nodes. |
Applications
| Industrial Power Input Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24 V DC input stage of PLC I/O module exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role: Primary shunt TVS for rail clamping ahead of DC-DC converter input. Use Value: Limits transient voltage to ≤64.5 V, preserving input capacitor and controller IC reliability under 100 A surge events. |
Use Scenario: LIN bus transceiver power supply line in door module subjected to battery disconnect spikes. IC Role / Device Role: Unidirectional clamp between VBAT and GND, protecting transceiver's VCC pin. Use Value: Maintains <1 µA leakage at 24 V nominal, avoiding quiescent current penalty while clamping to 64.5 V. |
| USB-C Port ESD Protection | Smart Meter Communication Interface |
Use Scenario: VBUS line of USB-C receptacle in portable test equipment handling hot-plug events. IC Role / Device Role: Secondary overvoltage guard after primary fuse and common-mode choke. Use Value: Withstands ±30 kV contact ESD per IEC 61000-4-2 without degradation, ensuring USB enumeration integrity. |
Use Scenario: RS-485 transceiver power rail in utility smart meter installed in outdoor cabinets. IC Role / Device Role: DC rail protector against induced surges from nearby lightning strikes on power lines. Use Value: 400 W rating supports 10/1000 µs waveform compliance per ANSI C62.41.2 Category B. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40A | Same VRWM (40 V), higher clamping voltage (69.4 V @ 5.7 A), SMB package (larger footprint, higher RθJA = 140 °C/W). | Less effective clamping margin for 3.3 V or 5 V logic rails; requires larger PCB area. | Select when legacy SMB footprint compatibility is required and thermal budget allows higher junction temperature rise. |
| 1.5SMC40A | Same VRWM (40 V), identical clamping (64.5 V @ 6.2 A), but SMC package (4.5 × 7.0 mm vs. D-FLAT's 4.0 × 2.6 mm). | Higher mounting height (2.3 mm vs. 1.0 mm) limits use in ultra-low-profile designs. | Choose only if existing SMC reflow profile or tooling mandates package reuse despite size penalty. |
Compared with SMBJ40A and 1.5SMC40A, P4SMAJ40ADF-13 delivers identical clamping performance in a 35% smaller footprint and 25% lower thermal resistance, making it optimal for space-constrained, thermally demanding industrial and automotive modules.
Availability
P4SMAJ40ADF-13 is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control modules, USB-C port ESD protection, and smart meter communication interfaces requiring stable component supply and RoHS-compliant, halogen-free sourcing.
Supply support for P4SMAJ40ADF-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 consumer markets.
P4SMAJ40ADF-13 belongs to the P4SMAJ series of 400 W surface-mount TVS diodes engineered for robust transient suppression in harsh environments where compact size, low leakage, and repeatable clamping are critical.
FAQ
What is the maximum operating temperature for P4SMAJ40ADF-13?
The device has an operating junction temperature range of –55 °C to +150 °C. At ambient temperatures above +25 °C, peak pulse power must be derated linearly per Figure 1 - e.g., at +75 °C ambient, maximum PPK drops to ~280 W for FR-4 boards with 1"×1" copper pads.
Does P4SMAJ40ADF-13 meet automotive AEC-Q200 requirements?
No - P4SMAJ40ADF-13 is not AEC-Q200 qualified. It is rated for industrial-grade operation (–55 °C to +150 °C) and complies with IEC 61000-4-2 ESD, but lacks the stress testing and qualification documentation required for automotive under-hood or safety-critical applications.
How does the D-FLAT package affect PCB layout for thermal performance?
Optimal thermal performance requires a minimum 0.2"×0.25" (5.1×6.4 mm) copper pad on the terminal side, connected via ≥2 thermal vias to inner-layer ground planes. The datasheet specifies RθJT = 37 °C/W for 1"×1" pads and 39 °C/W for 0.4"×0.5" pads - layout directly impacts sustained surge capability.
Can P4SMAJ40ADF-13 be used for bidirectional transient suppression?
No - it is a unidirectional TVS diode with cathode-anode polarity. For bidirectional protection (e.g., AC lines or differential buses), a symmetric device like P4SMAJ40CA or dedicated bidirectional TVS array is required; using this part in reverse bias risks permanent breakdown above 40 V.
P4SMAJ40ADF-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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 6.2A
- 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
P4SMAJ40ADF-13 FAQ
1.How can I place an order for P4SMAJ40ADF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMAJ40ADF-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 P4SMAJ40ADF-13 reliable?
The price and inventory of P4SMAJ40ADF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMAJ40ADF-13 is usually 5 days.
3.What payment methods are accepted for P4SMAJ40ADF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMAJ40ADF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMAJ40ADF-13?
P4SMAJ40ADF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMAJ40ADF-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 P4SMAJ40ADF-13?
For technical support, including P4SMAJ40ADF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMAJ40ADF-13 requirements.
6.How does Aetrix verify that P4SMAJ40ADF-13 is sourced from the original manufacturer or authorized distributors?
All P4SMAJ40ADF-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 P4SMAJ40ADF-13 meets industry standards.
7.What is the process for return or replacement of P4SMAJ40ADF-13?
All P4SMAJ40ADF-13 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMAJ40ADF-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 P4SMAJ40ADF-13 part is unused and in its original packaging.
Return procedure for P4SMAJ40ADF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMAJ40ADF-13 Tags
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Diodes Incorporated
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