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Diodes Incorporated P4SMAJ22ADF-13
- Part No.:
- P4SMAJ22ADF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
P4SMAJ22ADF-13.pdf
- Description:
- TVS DIODE 22VWM 35.5VC D-FLAT
- Quantity:
- Payment:
- Shipping:
Inventory:7,669
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Product details
Overview
P4SMAJ22ADF-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 22 V, clamping voltage of 35.5 V at 11.2 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 microcontrollers and sensors against lightning-induced surges.
For engineers reviewing the P4SMAJ22ADF-13 datasheet, P4SMAJ22ADF-13 pinout, P4SMAJ22ADF-13 application, or P4SMAJ22ADF-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, peak pulse current capability under 10/1000 µs waveform, thermal resistance on FR-4 PCB, and D-FLAT package compatibility with high-density layouts.
Technical Context
This TVS diode operates in avalanche breakdown mode during transients, providing low-impedance shunting above its 24.4–26.9 V breakdown range. Its glass-passivated junction ensures stable leakage (<1 µA at 22 V) and repeatable clamping performance across temperature (-55°C to +150°C).
The D-FLAT package delivers 37°C/W junction-to-terminal thermal resistance when mounted on a 1"×1" 2 oz copper pad, enabling reliable 400 W non-repetitive pulse handling without derating below +75°C ambient. Polarity is marked by a cathode band; anode connects to ground or low-impedance return path.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W - Sustains single 10×1000 µs surge events without failure |
| Reverse Standoff Voltage | 22 V - Maximum continuous DC voltage before leakage exceeds 1 µA |
| Clamping Voltage | 35.5 V @ 11.2 A - Voltage seen by protected circuit during worst-case surge |
| Breakdown Voltage | 24.4–26.9 V @ 1 mA - Confirmed avalanche onset range for design margining |
| ESD Rating | ±30 kV air / ±30 kV contact - Meets IEC 61000-4-2 Level 4 immunity |
| Thermal Resistance | 37°C/W (junction-to-terminal) - Enables direct heat transfer to PCB copper pour |
| Package | D-FLAT - 2.25–2.95 mm width, 3.95–4.60 mm length, 0.90–1.10 mm height |
Pinout & Package
Package: D-FLAT surface-mount package with cathode band marking; molded plastic case (UL 94V-0), matte tin-plated copper leadframe, 0.035 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Transient current sink | Connected to protected line; conducts surge current to ground reference |
| 2 (Anode) | Reference node | Typically tied to system ground or low-impedance return path for clamping action |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile D-FLAT packaging | Reduces board space by 40% vs. SMA packages while maintaining 400 W rating |
| Glass-passivated die construction | Ensures <1 µA leakage at VRWM and stable VBR over 1000+ surge cycles |
| IEC 61000-4-2 ESD robustness | Withstands ±30 kV contact discharge without parameter shift or failure |
| Lead-free and green compliance | RoHS 3 compliant with Br+Cl <1500 ppm and Sb <1000 ppm |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24 V DC input channels in programmable logic controllers exposed to inductive switching transients from solenoid drivers. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input terminal and ground to clamp spikes before reaching signal conditioning op-amps and ADC inputs. Use Value: Clamping at 35.5 V ensures protected 24 V rail ICs (e.g., MAX1300 ADC) remain within absolute maximum ratings during 40 A surge events. |
Use Scenario: LIN bus transceiver power supply line in door module subjected to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VCC rail upstream of TJA1020 transceiver, activated within nanoseconds of overvoltage onset. Use Value: 400 W rating handles 100 ms load dump pulses; D-FLAT footprint allows placement adjacent to connector entry point. |
| Telecom Power Feeds | Medical Diagnostic Equipment |
Use Scenario: -48 V DC power feed to remote radio units in outdoor base stations vulnerable to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional P4SMAJ22ADF-13 used with series fuse to protect DC/DC converter primary side. Use Value: 35.5 V clamping prevents damage to isolated flyback controller ICs rated for 36 V max input. |
Use Scenario: 24 V auxiliary supply rail in ultrasound imaging front-end modules where EMI-sensitive analog signal chains require clean power. IC Role / Device Role / Timing Role: Final-stage TVS on regulated 24 V output of medical-grade DC/DC converter, placed immediately before analog subsystem entry. Use Value: Low 1 µA leakage avoids loading precision voltage references; RoHS 3/green compliance meets IEC 60601-1 safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A-T | Same 22 V VRWM, but SMB package (higher RθJA = 125°C/W); 600 W rating | Requires larger PCB area; better suited for lower-density boards with higher thermal mass | Select when higher peak power margin is needed and board space permits SMB footprint |
| 1.5SMC22A | Same 22 V VRWM, but SMC package (RθJA = 110°C/W); 1500 W rating; 2.5x larger footprint | Used in high-reliability industrial power supplies where 1500 W surge handling is mandated | Choose only if system-level surge test requires >400 W capability and SMC mounting is acceptable |
Compared with SMBJ22A-T and 1.5SMC22A, P4SMAJ22ADF-13 offers optimal balance of 400 W surge capacity, ultra-compact D-FLAT footprint, and 37°C/W thermal resistance-making it preferred for space-constrained, thermally managed designs like automotive ECUs and telecom line cards.
Availability
P4SMAJ22ADF-13 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, and telecom power feeds requiring stable component supply with full traceability and lifecycle management.
Supply support for P4SMAJ22ADF-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 and automotive markets.
P4SMAJ22ADF-13 belongs to the P4SMAJ series of 400 W surface-mount TVS diodes engineered specifically for compact, high-efficiency overvoltage protection in harsh-environment DC power systems.
FAQ
What is the maximum operating temperature for P4SMAJ22ADF-13?
The device operates from -55°C to +150°C junction temperature. At ambient temperatures above +75°C, derating applies per Figure 1 in DS39017: power dissipation drops linearly to 50% at +125°C ambient. Thermal design must account for RθJT = 37°C/W on recommended 1"×1" 2 oz copper pad.
Does P4SMAJ22ADF-13 meet automotive AEC-Q200 requirements?
No-P4SMAJ22ADF-13 is not AEC-Q200 qualified. It is rated for industrial and commercial applications. For automotive use, Diodes Incorporated offers the AEC-Q200-qualified P4SMAJ22AHE3_A/H series, which shares identical electrical specs but undergoes extended stress testing including temperature cycling and humidity bias HAST.
How does the D-FLAT package affect PCB layout compared to SMA?
D-FLAT measures 2.25–2.95 mm × 3.95–4.60 mm × 0.90–1.10 mm-~35% smaller footprint than standard SMA. Its low profile enables placement under connectors or near board edges. Recommended pad layout uses 0.20" × 0.25" copper pads per Diodes' package outline document to achieve specified RθJT = 37°C/W.
Can P4SMAJ22ADF-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 data buses), use the complementary P4SMAJ22CA-13 variant, which integrates two opposing diodes in one D-FLAT package and provides symmetrical clamping at ±35.5 V.
P4SMAJ22ADF-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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 11.2A
- 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
P4SMAJ22ADF-13 FAQ
1.How can I place an order for P4SMAJ22ADF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMAJ22ADF-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 P4SMAJ22ADF-13 reliable?
The price and inventory of P4SMAJ22ADF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMAJ22ADF-13 is usually 5 days.
3.What payment methods are accepted for P4SMAJ22ADF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMAJ22ADF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMAJ22ADF-13?
P4SMAJ22ADF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMAJ22ADF-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 P4SMAJ22ADF-13?
For technical support, including P4SMAJ22ADF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMAJ22ADF-13 requirements.
6.How does Aetrix verify that P4SMAJ22ADF-13 is sourced from the original manufacturer or authorized distributors?
All P4SMAJ22ADF-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 P4SMAJ22ADF-13 meets industry standards.
7.What is the process for return or replacement of P4SMAJ22ADF-13?
All P4SMAJ22ADF-13 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMAJ22ADF-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 P4SMAJ22ADF-13 part is unused and in its original packaging.
Return procedure for P4SMAJ22ADF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMAJ22ADF-13 Tags
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