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Diodes Incorporated P6SMAJ20ADF-13
- Part No.:
- P6SMAJ20ADF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
P6SMAJ20ADF-13.pdf
- Description:
- TVS DIODE 20VWM 32.4VC D-FLAT
- Quantity:
- Payment:
- Shipping:
Inventory:5,640
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Product details
Overview
P6SMAJ20ADF-13 from Diodes Incorporated is a 600W surface-mount transient voltage suppressor (TVS) diode in the D-FLAT package, designed for unidirectional overvoltage protection of DC power rails and signal lines. It features a 20V reverse standoff voltage (VRWM), 22.2–25.5V breakdown voltage (VBR), 32.4V clamping voltage (VC) at 18.5A peak pulse current (IPP), and fast response time for ESD and surge suppression in industrial power supplies and automotive ECUs.
For engineers reviewing the P6SMAJ20ADF-13 datasheet, P6SMAJ20ADF-13 pinout, P6SMAJ20ADF-13 application, or P6SMAJ20ADF-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC, thermal resistance (RθJA = 92°C/W on 0.4" × 0.5" PCB), peak pulse power rating (600W), and RoHS-compliant green packaging with matte tin terminals.
Technical Context
This unidirectional TVS diode operates as a shunt-clamping device, conducting when reverse voltage exceeds its breakdown threshold to limit transient energy across protected circuit nodes. Its glass-passivated die ensures stable VBR tolerance and low leakage (<1µA at VRWM), while the D-FLAT package enables high-current handling (60A IFSM) with minimal board footprint.
The device conforms to the 10/1000µs standard surge waveform and delivers consistent clamping performance up to +150°C junction temperature. Thermal resistance values (RθJT = 57°C/W, RθJA = 92°C/W) are specified for defined FR-4 PCB layouts, enabling accurate thermal design for sustained surge duty cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - Sustains single 10/1000µs transients without failure under defined thermal conditions. |
| Reverse Standoff Voltage | 20V - Maximum continuous DC voltage before significant leakage; sets minimum operating rail margin. |
| Clamping Voltage | 32.4V @ 18.5A - Limits transient voltage seen by downstream ICs during surge events. |
| Breakdown Voltage | 22.2–25.5V @ 1mA - Confirmed conduction onset range; ensures reliable triggering above VRWM. |
| Thermal Resistance (J-A) | 92°C/W - Measured on 0.4" × 0.5", 2oz copper pad; determines steady-state temperature rise at 1.5W. |
| Package | D-FLAT - Low-profile surface-mount outline (4.65 × 2.80 × 1.10 mm); optimized for space-constrained PCBs. |
Pinout & Package
The P6SMAJ20ADF-13 is a two-terminal unidirectional TVS diode housed in the D-FLAT package. The cathode is marked by a band on the top surface; terminal 1 is cathode, terminal 2 is anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Transient Current Sink | Connected to protected line; conducts surge current to ground when clamped. |
| 2 (Anode) | Reference / Ground Return | Typically tied to system ground or low-impedance return path for effective clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile D-FLAT package | 4.65 × 2.80 × 1.10 mm footprint saves >30% board area vs. SMA packages. |
| Glass-passivated die construction | Ensures ±5% VBR tolerance stability and <1µA IR at VRWM across temperature and life. |
| 600W peak pulse rating | Supports IEC 61000-4-5 Level 4 (4kV) surge immunity on 12–24V DC rails. |
| RoHS-compliant & halogen-free | Meets EU Directive 2011/65/EU; Br+Cl <1500ppm, Sb <1000ppm - suitable for automotive and industrial end markets. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 24V CAN bus transceivers and microcontroller I/O against load dump and ISO 7637-2 pulses. IC Role / Device Role: Shunt clamping element placed between CAN_H/CAN_L and chassis ground. Use Value: Clamps transients to ≤32.4V, preserving transceiver integrity during 100V/50ms load dump events. | Use Scenario: Input rail protection for 12V power supply feeding MCU, sensors, and LIN transceivers. IC Role / Device Role: Primary overvoltage clamp on main VBAT input prior to LDO regulator. Use Value: Limits voltage excursions to 32.4V during jump-start or alternator surge, preventing LDO overvoltage failure. |
| Programmable Logic Controllers | DC Power Supply Outputs |
Use Scenario: Field I/O channel protection against induced surges on 24V digital inputs connected to solenoids or relays. IC Role / Device Role: Point-of-entry TVS on each isolated input channel before optocoupler or buffer. Use Value: Absorbs 600W transients without degradation, maintaining channel isolation integrity per IEC 61000-4-5. | Use Scenario: Output overvoltage clamp on 20V SMPS secondary side supplying FPGAs or ADCs. IC Role / Device Role: Secondary-side crowbar alternative; clamps output to safe level during feedback loop failure. Use Value: Limits output to 32.4V during fault, protecting 25V-rated downstream capacitors and ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A-13-F | Same 20V VRWM, but SMA package (higher RθJA = 125°C/W); 400W peak power rating. | Larger footprint; less effective thermal dissipation on dense boards. | Select when legacy SMA layout exists and 400W rating suffices. |
| 1.5SMC20A-Q | Higher 1500W rating, DO-214AB package; 33.2V clamping at 45.2A IPP. | Requires larger PCB area; better suited for higher-energy surges. | Choose for enhanced IEC 61000-4-5 Level 5 compliance where space permits. |
Compared with SMAJ20A-13-F and 1.5SMC20A-Q, the P6SMAJ20ADF-13 offers superior power density (600W in D-FLAT), lower thermal resistance (92°C/W), and tighter VBR tolerance-making it optimal for compact, thermally constrained 20V rail protection where precise clamping and board space are critical.
Availability
P6SMAJ20ADF-13 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and programmable logic controllers requiring stable component supply and long-term production continuity.
Supply support for P6SMAJ20ADF-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 P6SMAJ series belongs to Diodes' transient voltage suppressor product line, engineered specifically for robust, low-profile DC rail protection in space- and thermal-sensitive applications such as automotive ECUs and industrial PLCs.
FAQ
What is the polarity configuration of P6SMAJ20ADF-13?
The P6SMAJ20ADF-13 is a unidirectional TVS diode with cathode marking (band) on terminal 1. It conducts only during reverse-biased overvoltage events, making it suitable for DC rail protection where polarity is fixed. It does not conduct during forward bias except under surge conditions exceeding VF ≈ 3.5V at 35A.
How does the D-FLAT package affect thermal performance compared to SMA?
The D-FLAT package achieves RθJA = 92°C/W on a 0.4" × 0.5" PCB, versus ~125°C/W for standard SMA packages. This 26% lower thermal resistance results from optimized copper pad geometry and shorter internal thermal paths, enabling higher sustained power handling in compact layouts without heatsinking.
Can P6SMAJ20ADF-13 be used for bidirectional protection?
No - P6SMAJ20ADF-13 is strictly unidirectional. For AC or bidirectional signal line protection (e.g., RS-485, USB), a bidirectional variant such as P6SMBJ20CA-13 or paired unidirectional devices are required. Its schematic symbol and cathode marking confirm single-quadrant operation.
What is the maximum allowable mounting temperature during reflow soldering?
The P6SMAJ20ADF-13 is rated for lead-free reflow per J-STD-020, with a peak temperature of 260°C for ≤30 seconds. Its matte tin annealed terminals ensure reliable wetting, and moisture sensitivity level 1 allows unlimited floor life without dry-pack requirements.
P6SMAJ20ADF-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 2-SMD, Flat Leads
- Series:
- SMAJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 18.5A
- Power - Peak Pulse:
- 600W
- 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
P6SMAJ20ADF-13 FAQ
1.How can I place an order for P6SMAJ20ADF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMAJ20ADF-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 P6SMAJ20ADF-13 reliable?
The price and inventory of P6SMAJ20ADF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMAJ20ADF-13 is usually 5 days.
3.What payment methods are accepted for P6SMAJ20ADF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMAJ20ADF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMAJ20ADF-13?
P6SMAJ20ADF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMAJ20ADF-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 P6SMAJ20ADF-13?
For technical support, including P6SMAJ20ADF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMAJ20ADF-13 requirements.
6.How does Aetrix verify that P6SMAJ20ADF-13 is sourced from the original manufacturer or authorized distributors?
All P6SMAJ20ADF-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 P6SMAJ20ADF-13 meets industry standards.
7.What is the process for return or replacement of P6SMAJ20ADF-13?
All P6SMAJ20ADF-13 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMAJ20ADF-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 P6SMAJ20ADF-13 part is unused and in its original packaging.
Return procedure for P6SMAJ20ADF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMAJ20ADF-13 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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