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Diodes Incorporated P4SMAJ7.5ADF-13
- Part No.:
- P4SMAJ7.5ADF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
P4SMAJ7.5ADF-13.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC D-FLAT
- Quantity:
- Payment:
- Shipping:
Inventory:8,928
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Product details
Overview
P4SMAJ7.5ADF-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 7.5V, clamping voltage of 12.9V at 31.0A peak pulse current, and IEC 61000-4-2 ESD rating of ±30kV (air/contact). Used in automotive infotainment power inputs and industrial sensor interfaces to absorb lightning-induced surges and ESD events.
For engineers reviewing the P4SMAJ7.5ADF-13 datasheet, P4SMAJ7.5ADF-13 pinout, P4SMAJ7.5ADF-13 application, or P4SMAJ7.5ADF-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC VMAX, 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 unidirectional TVS diode operates as a shunt-clamping device that remains high-impedance below 7.5V VRWM and rapidly transitions to low-impedance conduction when transient voltage exceeds its 8.33–9.21V breakdown range. Its glass-passivated junction ensures stable leakage (<50µA at VRWM) and repeatable clamping performance across temperature.
The D-FLAT package delivers low thermal resistance (RθJT = 37°C/W on 1"×1" FR-4), enabling reliable 400W non-repetitive pulse handling without thermal runaway. Polarity is marked by a cathode band, and terminals are matte tin annealed over copper for MIL-STD-202-compliant solderability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W (non-repetitive, 10×1000µs waveform; defines maximum surge energy absorption) |
| Reverse Standoff Voltage | 7.5V (maximum continuous DC operating voltage before significant leakage) |
| Breakdown Voltage | 8.33–9.21V @ 1.0mA (guaranteed conduction onset window for predictable clamping threshold) |
| Clamping Voltage | 12.9V @ 31.0A IPP (maximum voltage seen by protected circuit during worst-case surge) |
| ESD Rating | ±30kV air / ±30kV contact per IEC 61000-4-2 (meets Level 4 system-level ESD immunity) |
| Thermal Resistance | 37°C/W junction-to-terminal (enables effective heat transfer to PCB copper pad under surge conditions) |
| Capacitance | Typical 500pF @ 0V, 1MHz (low enough for <10Mbps data lines; verified at VRWM = 0V) |
Pinout & Package
Package: D-FLAT (low-profile surface-mount, 2.25–2.95mm width × 3.95–4.60mm length × 0.90–1.10mm height, UL 94V-0 molded plastic case, cathode band polarity indicator).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | High-side connection to protected line | Connected to input rail or signal line; carries full surge current during clamping |
| 2 (Anode) | Low-side reference to ground or return path | Must be routed to low-inductance ground plane to minimize clamping voltage overshoot |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Ensures long-term stability of breakdown voltage and leakage current over temperature and life cycle |
| IEC 61000-4-2 ±30kV ESD robustness | Eliminates need for secondary ESD protection in end-equipment compliance testing |
| D-FLAT low-profile package | Reduces board space by >40% vs. SMA; enables routing under adjacent components in dense layouts |
| Lead-free, halogen-free, RoHS 3 compliant | Meets IPC-J-STD-609 Class 3 requirements for green electronics manufacturing |
Applications
| Automotive Infotainment Power Input | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12V supply rail feeding head unit MCU and display driver ICs exposed to load dump transients. IC Role / Device Role: Unidirectional shunt TVS placed between VIN and GND upstream of LDO regulator. Use Value: Clamps 400W surges to ≤12.9V, preventing damage to 16V-rated downstream regulators and preserving system uptime. |
Use Scenario: 4–20mA analog current loop interface connecting PLC to remote pressure sensor in factory automation. IC Role / Device Role: Bidirectional protection not required; unidirectional TVS guards against induced surges on +24V loop supply line. Use Value: Withstands 31A pulses while maintaining <50µA leakage at 7.5V, ensuring loop accuracy stays within 0.1% full-scale error. |
| USB-C Port VBUS Line Protection | Smart Meter Communication Interface |
Use Scenario: VBUS line in USB-C receptacle subjected to hot-plug ESD and cable discharge events. IC Role / Device Role: Primary TVS on VBUS rail, positioned before USB PD controller and power switch. Use Value: Responds in <1ns to ±30kV ESD strikes, limiting voltage to 12.9V - below absolute max rating of common PD controllers (e.g., FUSB302). |
Use Scenario: RS-485 transceiver bus lines in utility smart meters deployed in lightning-prone rural substations. IC Role / Device Role: TVS on A/B differential pair, referenced to local ground with low-inductance layout. Use Value: 12.9V clamping protects transceivers rated for ±15V common-mode range while surviving 31A surges per IEC 61000-4-5 Level 3. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5A (Bourns) | Same 7.5V VRWM and 12.9V VC, but SMB package (higher RθJA = 125°C/W vs. 88°C/W) | Less effective thermal dissipation on compact PCBs; requires larger copper area for same power handling | Select when existing layout uses SMB footprint and thermal derating is acceptable |
| 1.5SMC7.5A (ON Semiconductor) | Higher clamping voltage (13.3V @ 31.3A); 1500W rating but larger SMC package (5.3mm × 4.5mm) | Greater voltage margin needed for 15V-tolerant circuits; incompatible with D-FLAT board space constraints | Choose only if higher surge energy (1500W) is mandatory and board area permits SMC footprint |
Compared with SMBJ7.5A and 1.5SMC7.5A, P4SMAJ7.5ADF-13 offers optimal balance of low-profile D-FLAT packaging, industry-leading 37°C/W junction-to-terminal thermal resistance, and precise 12.9V clamping - critical for protecting modern low-voltage ICs in space-constrained designs.
Availability
P4SMAJ7.5ADF-13 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor interfaces, USB-C power delivery modules, and smart meter communication subsystems requiring stable component supply and consistent surge performance across production batches.
Supply support for P4SMAJ7.5ADF-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.
The P4SMAJ series belongs to Diodes' transient voltage suppressor portfolio, engineered specifically for high-power, low-profile surge suppression in space-constrained applications where thermal efficiency and ESD robustness are critical.
FAQ
What is the maximum allowable ambient temperature for continuous operation?
The P4SMAJ7.5ADF-13 supports an operating temperature range of –55°C to +150°C. At +75°C ambient, its steady-state power dissipation is rated at 1.0W. Derating follows Figure 1: power drops linearly to ~65% at +100°C and ~30% at +125°C ambient, based on thermal resistance and PCB copper area.
Can this TVS be used in bidirectional configurations?
No - P4SMAJ7.5ADF-13 is a unidirectional device with cathode-anode polarity. For bidirectional protection (e.g., AC lines or differential buses), Diodes' P4SMAJ7.5CA-13 or SMBJ7.5CA must be used. Using this part in reverse-biased AC applications risks permanent junction failure due to lack of reverse breakdown specification.
How does its clamping performance compare under repetitive surges?
The 400W rating applies to non-repetitive pulses (≤4 pulses/minute, 8.3ms half-sine or 10×1000µs waveform). Under repetitive conditions, average power must stay below 1.0W PM(AV) at TL = +75°C. Thermal design must ensure junction temperature remains ≤+150°C using RθJT = 37°C/W and appropriate PCB copper area.
Is the marking code "HP" sufficient for full traceability?
Yes - "HP" is the official Diodes Incorporated marking code for P4SMAJ7.5ADF-13, as confirmed in Table 1 of DS39017 Rev. 3-2. Combined with date code (YWW format, e.g., "923" for week 23 of 2019) and manufacturers' code, it enables full lot traceability through Diodes' quality database and material certifications.
P4SMAJ7.5ADF-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 2-SMD, Flat Leads
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 31A
- 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
P4SMAJ7.5ADF-13 FAQ
1.How can I place an order for P4SMAJ7.5ADF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMAJ7.5ADF-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 P4SMAJ7.5ADF-13 reliable?
The price and inventory of P4SMAJ7.5ADF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMAJ7.5ADF-13 is usually 5 days.
3.What payment methods are accepted for P4SMAJ7.5ADF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMAJ7.5ADF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMAJ7.5ADF-13?
P4SMAJ7.5ADF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMAJ7.5ADF-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 P4SMAJ7.5ADF-13?
For technical support, including P4SMAJ7.5ADF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMAJ7.5ADF-13 requirements.
6.How does Aetrix verify that P4SMAJ7.5ADF-13 is sourced from the original manufacturer or authorized distributors?
All P4SMAJ7.5ADF-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 P4SMAJ7.5ADF-13 meets industry standards.
7.What is the process for return or replacement of P4SMAJ7.5ADF-13?
All P4SMAJ7.5ADF-13 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMAJ7.5ADF-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 P4SMAJ7.5ADF-13 part is unused and in its original packaging.
Return procedure for P4SMAJ7.5ADF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMAJ7.5ADF-13 Tags
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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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