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Diodes Incorporated P6SMAJ51ADF-13
- Part No.:
- P6SMAJ51ADF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
P6SMAJ51ADF-13.pdf
- Description:
- TVS DIODE 51VWM 82.4VC D-FLAT
- Quantity:
- Payment:
- Shipping:
Inventory:7,248
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Product details
Overview
P6SMAJ51ADF-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 51V reverse standoff voltage, 82.4V max clamping voltage at 7.3A peak pulse current, and fast response time under 1.0ps. Used in industrial power supplies and automotive ECUs to protect downstream ICs from ESD and lightning-induced surges.
For engineers reviewing the P6SMAJ51ADF-13 datasheet, P6SMAJ51ADF-13 pinout, P6SMAJ51ADF-13 application, or P6SMAJ51ADF-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, thermal resistance on FR-4 PCBs, IEC 61000-4-2/4-5 compliance capability, and D-FLAT package footprint compatibility with automated assembly.
Technical Context
This TVS operates as a unidirectional avalanche diode with cathode-anode polarity, triggered when reverse voltage exceeds 51V standoff level. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1µA at VRWM), while the D-FLAT package enables low-inductance mounting critical for high-speed surge suppression.
It conforms to the 10/1000µs double-exponential surge waveform standard (per REA), delivering 600W non-repetitive peak pulse power with derating above +25°C ambient. Thermal resistance is 92°C/W (junction-to-ambient) on a 0.4" × 0.5" copper pad - a design-critical value for sustained surge duty cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W - Sustains single 10/1000µs surges up to this level without failure |
| Reverse Standoff Voltage (VRWM) | 51.0 V - Maximum continuous DC voltage before significant leakage begins |
| Clamping Voltage (VC) | 82.4 V @ 7.3 A - Limits voltage seen by protected circuit during worst-case surge |
| Breakdown Voltage (VBR) | 56.7–65.2 V @ 1.0 mA - Confirmed avalanche onset range under standardized test current |
| Thermal Resistance (RθJA) | 92 °C/W - Measured on 0.4" × 0.5", 2oz FR-4 pad; determines temperature rise under power dissipation |
| Capacitance (CT) | 15 pF @ 0 V, 1 MHz - Low enough to avoid signal integrity degradation in data lines up to ~1 GHz |
Pinout & Package
Package: D-FLAT - Low-profile, surface-mount plastic package (4.65 mm × 2.80 mm × 1.10 mm), UL 94V-0 rated, with matte tin–annealed copper leadframe and cathode band polarity indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Surge Current Sink | Connected to protected line; conducts surge current to ground when clamped |
| 2 (Anode) | Reference / Ground Return | Typically tied to system ground plane; completes current path during transient events |
Key Features
| Feature | Design Value |
|---|---|
| 600W Peak Pulse Rating | Enables robust protection against IEC 61000-4-5 Level 4 (4kV) surges in industrial 24V systems |
| Glass-Passivated Junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| D-FLAT Low-Profile Package | Reduces board space by >30% vs. SMA; supports high-density routing and automated optical inspection |
| RoHS & Halogen-Free Compliance | Meets EU RoHS 2 (2011/65/EU) and green standards (<900 ppm Br/Cl, <1000 ppm Sb) |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24V DC input terminals of programmable logic controller modules exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp surges before they reach upstream DC-DC converter and microcontroller. Use Value: Clamps to 82.4V within picoseconds, keeping protected 3.3V/5V logic supply ICs below absolute maximum ratings during 10/1000µs 1kV surges. |
Use Scenario: LIN bus transceiver power pins in door module ECUs subjected to battery reverse connection and jump-start spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VBAT rail feeding LIN PHY and MCU, positioned upstream of LDO regulator. Use Value: Withstands 60A surge (8.3ms half-sine) and limits clamping overshoot to ≤85V, preventing latch-up in 5V-tolerant transceivers. |
| Telecom Power Feeds | Medical Diagnostic Equipment |
Use Scenario: -48V DC telecom power distribution boards where hot-swap insertion causes voltage overshoot and back-EMF. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional P6SMAJ51ADF-13 used on negative rail to absorb positive-going transients only. Use Value: 15pF capacitance avoids signal distortion on adjacent RS-485 control lines; 92°C/W RθJA allows thermal stability under repeated 200W surges. |
Use Scenario: Auxiliary 5V/12V rails in ultrasound imaging front-end modules, subject to ESD from operator touch and cable coupling. IC Role / Device Role / Timing Role: Final-stage protection before analog front-end ADC drivers and clock buffers. Use Value: Sub-1µA leakage at 51V ensures no measurable offset drift in precision sensor bias networks; RoHS/green compliance meets IEC 60601-1 Annex A requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A (Bourns) | Same 51V VRWM, but SMB package (larger footprint, 3.5mm × 4.6mm); RθJA = 110°C/W on same pad | Less suitable for ultra-dense layouts; higher thermal resistance reduces surge repetition rate capability | Select when legacy SMB footprint exists or when higher surge current rating (8.2A IPP) is prioritized over board space |
| 1.5SMC51A (ON Semiconductor) | Same electrical specs, but SMC package (7.1mm × 6.2mm); 1.5kW rating but larger size and lower power density | Overqualified for 600W needs; incompatible with fine-pitch automated placement due to size and weight | Choose only if existing SMC reflow profile or qualification history mandates continuity, not performance optimization |
Compared with SMBJ51A and 1.5SMC51A, P6SMAJ51ADF-13 delivers identical protection performance in 45% less board area and 20% lower thermal resistance - making it optimal for space-constrained, thermally demanding industrial and automotive modules where layout efficiency directly impacts system cost and reliability.
Availability
P6SMAJ51ADF-13 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body controllers, and telecom power feeds requiring stable component supply, consistent parametric binning, and full traceability across production lots.
Supply support for P6SMAJ51ADF-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 Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
The P6SMAJ series belongs to Diodes' transient voltage suppressor product line, engineered specifically for high-power, low-inductance surge protection in harsh-environment applications including factory automation, transportation, and infrastructure equipment.
FAQ
What is the maximum operating temperature for P6SMAJ51ADF-13?
The device has an operating junction temperature range of –55°C to +150°C. Its thermal resistance (RθJA = 92°C/W) means that at 600W peak power, even brief pulses require careful PCB copper area design - sustained operation above +125°C ambient is not recommended without active cooling or derating.
Is P6SMAJ51ADF-13 suitable for bidirectional surge protection?
No - it is a unidirectional TVS diode with cathode-anode polarity. For bidirectional protection (e.g., AC lines or differential data buses), a symmetric pair or dedicated bidirectional part like P6SMBJ51CA must be used. The schematic shows terminal 1 as cathode, confirming unidirectional conduction.
How does the D-FLAT package affect solder joint reliability?
The D-FLAT's flat, dual-terminal construction eliminates leads and minimizes mechanical stress during thermal cycling. Its matte tin–annealed copper leadframe provides excellent wetting and intermetallic formation, achieving >99.9% first-pass yield in J-STD-020-compliant reflow profiles with peak temperatures up to 260°C.
Does P6SMAJ51ADF-13 meet IEC 61000-4-2 ESD immunity requirements?
Yes - its sub-1.0ps response time and low clamping voltage enable effective protection against contact discharge up to ±25kV and air discharge up to ±30kV when properly laid out with short traces and solid ground planes. System-level testing per IEC 61000-4-2 requires validation, but the device's parameters align with Class 4 compliance targets.
P6SMAJ51ADF-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):
- 51V
- Voltage - Breakdown (Min):
- 56.7V
- Voltage - Clamping (Max) @ Ipp:
- 82.4V
- Current - Peak Pulse (10/1000µs):
- 7.3A
- 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
P6SMAJ51ADF-13 FAQ
1.How can I place an order for P6SMAJ51ADF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMAJ51ADF-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 P6SMAJ51ADF-13 reliable?
The price and inventory of P6SMAJ51ADF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMAJ51ADF-13 is usually 5 days.
3.What payment methods are accepted for P6SMAJ51ADF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMAJ51ADF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMAJ51ADF-13?
P6SMAJ51ADF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMAJ51ADF-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 P6SMAJ51ADF-13?
For technical support, including P6SMAJ51ADF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMAJ51ADF-13 requirements.
6.How does Aetrix verify that P6SMAJ51ADF-13 is sourced from the original manufacturer or authorized distributors?
All P6SMAJ51ADF-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 P6SMAJ51ADF-13 meets industry standards.
7.What is the process for return or replacement of P6SMAJ51ADF-13?
All P6SMAJ51ADF-13 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMAJ51ADF-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 P6SMAJ51ADF-13 part is unused and in its original packaging.
Return procedure for P6SMAJ51ADF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMAJ51ADF-13 Tags
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ESD9B5.0ST5G
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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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