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Diodes Incorporated P6SMAJ28ADF-13
- Part No.:
- P6SMAJ28ADF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
P6SMAJ28ADF-13.pdf
- Description:
- TVS DIODE 28VWM 45.4VC D-FLAT
- Quantity:
- Payment:
- Shipping:
Inventory:6,472
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Product details
Overview
P6SMAJ28ADF-13 from Diodes Incorporated is a 600W 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 28 V, breakdown voltage range of 31.1–35.8 V at 1.0 mA test current, clamping voltage of 45.4 V at 13.2 A peak pulse current, and D-FLAT package for space-constrained PCB layouts-used in industrial power supply input stages.
For engineers reviewing the P6SMAJ28ADF-13 datasheet, P6SMAJ28ADF-13 pinout, P6SMAJ28ADF-13 application, or P6SMAJ28ADF-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC VMAX, peak pulse current capability under IEC 61000-4-5 surge conditions, thermal resistance on defined PCB copper area, and RoHS/Green compliance for end-product certification.
Technical Context
This TVS operates as a unidirectional avalanche diode with cathode-anode polarity, triggered when reverse voltage exceeds its breakdown threshold. Its glass-passivated die ensures stable VBR tolerance and low leakage (<1 µA at 28 V), while fast response time (<1 ns) enables suppression of ESD (IEC 61000-4-2) and lightning-induced surges (IEC 61000-4-5).
The device uses a 10/1000 µs double-exponential pulse waveform per REA standard for rating clamping performance. Thermal design relies on junction-to-terminal resistance of 64 °C/W (1"×1" pad) or 57 °C/W (0.4"×0.5" pad), requiring appropriate copper pour to sustain 1.5 W steady-state dissipation at TL = +75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W - Sustains single 10/1000 µs surges up to this level without failure |
| Reverse Standoff Voltage (VRWM) | 28 V - Maximum continuous DC or RMS voltage before significant leakage |
| Breakdown Voltage (VBR) | 31.1–35.8 V @ 1.0 mA - Confirmed avalanche initiation window for reliable triggering |
| Clamping Voltage (VC) | 45.4 V @ 13.2 A - Maximum voltage seen by downstream circuit during rated surge |
| Peak Pulse Current (IPP) | 13.2 A - Peak current supported under 10/1000 µs waveform at VC |
| Junction-to-Ambient RθJA | 115 °C/W - Thermal limit on standard FR-4 board; dictates minimum copper area needed |
| Package | D-FLAT - 2-pin, low-profile surface-mount outline (4.65 mm × 2.80 mm × 1.10 mm) |
Pinout & Package
Package: D-FLAT, surface-mount, molded plastic case with cathode band marking. Dimensions: 4.65 mm × 2.80 mm × 1.10 mm (L × W × H), weight ≈ 0.035 g. Terminals are matte tin annealed over copper leadframe, solderable per MIL-STD-202.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Protected Circuit Return / Surge Sink | Connected to ground or low-impedance return path; carries full surge current during clamping |
| 2 (Anode) | Line Input / Signal Source | Connected to line being protected (e.g., 24 V rail); reverse-biased during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| 600 W Peak Pulse Rating | Enables robust protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges on 24 V systems |
| Glass-Passivated Die | Ensures stable VBR across temperature and lifetime, minimizing parameter drift in industrial environments |
| Low Clamping Ratio (VC/VBR ≈ 1.39) | Reduces stress on downstream components by limiting overvoltage excursion during surge events |
| D-FLAT Low-Profile Package | Reduces board footprint by >40% vs. SMA; supports automated placement and high-density routing |
| Halogen- & Antimony-Free "Green" Construction | Meets IPC-1752A material declaration requirements and EU ELV directive limits |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module Inputs |
|---|---|
Use Scenario: 24 V DC sensor inputs in programmable logic controllers exposed to inductive switching transients and field wiring surges. IC Role / Device Role: Unidirectional TVS placed between input terminal and ground to clamp transients before they reach signal conditioning op-amps or microcontroller GPIOs. Use Value: Limits voltage to ≤45.4 V during 13.2 A surges, protecting 3.3 V/5 V interface ICs with 50 V absolute maximum ratings. | Use Scenario: LIN bus or switched 12 V power inputs in body control modules subject to load dump and jump-start conditions. IC Role / Device Role: Primary overvoltage clamp on battery-fed lines, coordinated with upstream fuses and secondary TVS arrays. Use Value: Withstands 60 A non-repetitive forward surge (IFSM), surviving short-duration 24 V jump-start transients without degradation. |
| Telecom Power Feeds | Medical Equipment DC Power Rails |
Use Scenario: -48 V DC telecom power distribution boards where hot-swap events and cable discharge generate high-energy transients. IC Role / Device Role: Secondary surge protection stage after bulk MOVs, providing precise clamping near equipment input connectors. Use Value: 28 V VRWM aligns with -48 V system derating margins; 600 W rating handles residual energy passing through front-end filters. | Use Scenario: Isolated 24 V auxiliary rails powering analog front-ends in diagnostic imaging subsystems. IC Role / Device Role: Final-stage transient suppressor on safety-isolated power outputs, ensuring immunity to ESD coupling via shared chassis grounds. Use Value: <1 µA leakage at 28 V prevents signal offset errors in precision amplifiers; RoHS/Green compliance meets IEC 60601-1 material restrictions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A-Q | Same 28 V VRWM, but 400 W PPK; higher leakage (5 µA max @ VRWM) | Lower surge handling; suitable only for ESD-only zones, not AC-line or automotive load dump | Select when cost sensitivity outweighs need for IEC 61000-4-5 compliance |
| 1.5SMC28A | Same 28 V VRWM, 1500 W PPK, DO-214AB package (larger footprint) | Higher surge capacity but 5.3 mm × 6.2 mm footprint increases board area by 2.3× | Select when surge margin is critical and PCB space allows larger SMC outline |
Compared with SMAJ28A-Q and 1.5SMC28A, P6SMAJ28ADF-13 delivers optimal balance of 600 W surge rating, D-FLAT space efficiency, and sub-µA leakage-making it preferred for compact industrial and automotive control modules where both footprint and reliability are constrained.
Availability
P6SMAJ28ADF-13 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control module inputs, and telecom power feed applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for P6SMAJ28ADF-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, headquartered in California, with design, manufacturing, and sales operations across Asia, Europe, and North America.
This device belongs to the P6SMAJ series of surface-mount TVS diodes, engineered specifically for high-reliability transient suppression in space-constrained industrial, automotive, and communications equipment where low-profile packaging and tight VBR tolerance are essential.
FAQ
What is the polarity configuration of P6SMAJ28ADF-13?
P6SMAJ28ADF-13 is a unidirectional TVS diode with cathode-anode polarity. Pin 1 (marked with cathode band) connects to ground or return path; Pin 2 connects to the line being protected. It conducts only during reverse overvoltage events, blocking normal forward bias.
Can P6SMAJ28ADF-13 be used for bidirectional surge protection?
No. This device is unidirectional and lacks symmetrical clamping behavior. For bidirectional protection (e.g., AC lines or data lines with ± transients), use a dedicated bidirectional TVS such as P6SMBJ28CA or SMBJ28CA-both rated for ±28 V standoff and same 600 W pulse power.
What is the maximum allowable PCB copper pad size for thermal performance?
For rated 1.5 W steady-state dissipation at TL = +75°C, Diodes Incorporated specifies two validated layouts: 1" × 1" (2 oz Cu) yields RθJA = 115 °C/W; 0.4" × 0.5" (2 oz Cu) yields RθJA = 92 °C/W. Smaller pads increase junction temperature and reduce surge endurance.
Does P6SMAJ28ADF-13 meet AEC-Q200 stress testing requirements?
No. While P6SMAJ28ADF-13 is qualified to industrial temperature range (–55°C to +150°C) and RoHS/Green standards, it is not AEC-Q200 qualified. For automotive-grade TVS diodes, consider Diodes' AEC-Q200-compliant AP6SMAJ28A or SMAJ28A-Q variants with full qualification documentation.
P6SMAJ28ADF-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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 13.2A
- 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
P6SMAJ28ADF-13 FAQ
1.How can I place an order for P6SMAJ28ADF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMAJ28ADF-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 P6SMAJ28ADF-13 reliable?
The price and inventory of P6SMAJ28ADF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMAJ28ADF-13 is usually 5 days.
3.What payment methods are accepted for P6SMAJ28ADF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMAJ28ADF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMAJ28ADF-13?
P6SMAJ28ADF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMAJ28ADF-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 P6SMAJ28ADF-13?
For technical support, including P6SMAJ28ADF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMAJ28ADF-13 requirements.
6.How does Aetrix verify that P6SMAJ28ADF-13 is sourced from the original manufacturer or authorized distributors?
All P6SMAJ28ADF-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 P6SMAJ28ADF-13 meets industry standards.
7.What is the process for return or replacement of P6SMAJ28ADF-13?
All P6SMAJ28ADF-13 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMAJ28ADF-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 P6SMAJ28ADF-13 part is unused and in its original packaging.
Return procedure for P6SMAJ28ADF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMAJ28ADF-13 Tags
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Diodes Incorporated
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