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Diodes Incorporated P6SMAJ40ADF
- Part No.:
- P6SMAJ40ADF
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
P6SMAJ40ADF.pdf
- Description:
- TVS DIODE 40VWM 64.5VC D-FLAT
- Quantity:
- Payment:
- Shipping:
Inventory:8,455
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Product details
Overview
P6SMAJ40ADF from Diodes Incorporated is a 600W surface-mount transient voltage suppressor (TVS) diode designed for unidirectional overvoltage protection in DC power rails and signal lines. It features a 40V reverse standoff voltage, 64.5V max clamping voltage at 9.3A peak pulse current, and fast response time to protect sensitive electronics against ESD and surge events in industrial control and automotive subsystems.
For engineers reviewing the P6SMAJ40ADF datasheet, P6SMAJ40ADF pinout, P6SMAJ40ADF application, or P6SMAJ40ADF equivalent, key selection criteria include clamping voltage margin relative to system operating voltage, thermal resistance under PCB layout constraints, IPP capability for defined surge waveforms (10/1000 µs), and D-FLAT package compatibility with high-density SMT assembly.
Technical Context
This unidirectional TVS diode operates as a shunt-clamping device triggered by reverse-biased avalanche breakdown above its 44.4–51.1V breakdown range. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1 µA at 40V), while the D-FLAT package enables low-inductance mounting critical for sub-nanosecond transient suppression.
Thermal performance is defined by two RθJA values (115°C/W and 92°C/W) depending on PCB copper pad area, directly impacting sustained surge handling in repetitive fault conditions. The 64.5V clamping voltage is specified at 9.3A under standardized 10×1000 µs waveform per REA, confirming compliance with IEC 61000-4-5 Level 3 surge immunity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W - Sustains single 10/1000 µs surges up to this energy level without failure |
| Reverse Standoff Voltage (VRWM) | 40.0 V - Maximum continuous DC or RMS voltage before significant leakage begins |
| Clamping Voltage (VC) | 64.5 V @ 9.3 A - Voltage seen by protected circuit during worst-case 10/1000 µs surge |
| Breakdown Voltage (VBR) | 44.4–51.1 V @ 1 mA - Confirmed avalanche onset range ensuring reliable triggering margin |
| Package | D-FLAT - Low-profile (1.1 mm max height), 2-pin surface-mount package with cathode band polarity marking |
| Operating Temperature | −55°C to +150°C - Validated operation across extended industrial and automotive ambient ranges |
Pinout & Package
The P6SMAJ40ADF is housed in the D-FLAT package: a molded plastic case (UL 94V-0 rated), 2.25–2.95 mm wide, 3.95–4.60 mm long, with 0.90–1.10 mm height and matte tin-plated copper leadframe terminals. Polarity is indicated by a cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Anode of internal avalanche diode structure | Connected to protected line; conducts surge current to ground when VIN exceeds VRWM |
| 2 (Anode) | Cathode of internal avalanche diode structure | Typically tied to system ground; completes low-impedance path for transient energy dissipation |
Key Features
| Feature | Design Value |
|---|---|
| 600W Peak Pulse Power Rating | Enables robust protection against IEC 61000-4-5 10/1000 µs surges up to 4kV in 2Ω source impedance systems |
| Glass-Passivated Junction | Ensures stable VBR and <1 µA leakage at VRWM, critical for low-power sensor and battery-backed circuits |
| D-FLAT Surface-Mount Package | Reduces parasitic inductance vs. SMA/SMB packages, improving clamping speed and high-frequency surge response |
| RoHS & Halogen-Free Compliance | Meets EU RoHS 2 (2011/65/EU) and green manufacturing standards (<900 ppm Br/Cl, <1000 ppm Sb) |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 24V DC input channels on programmable logic controller modules against induced lightning surges and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between field input and local ground, clamping transients within 1 ns after threshold exceedance. Use Value: 64.5V clamping ensures safe margin below 75V system maximum rating while maintaining <1 µA leakage at 24V nominal operation. | Use Scenario: Safeguarding LIN bus transceiver power supply pins in door module ECUs exposed to load dump and jump-start events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12V rail upstream of LDO regulator, activated before downstream IC damage thresholds are exceeded. Use Value: 600W rating supports 12V/300ms load dump per ISO 7637-2 Pulse 5a, with D-FLAT footprint enabling compact placement near connector entry points. |
| Smart Meter Power Supply | POS Terminal Serial Interface |
Use Scenario: Securing AC/DC converter output rails in utility smart meters subjected to conducted surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Secondary protection stage following MOV-based front-end, providing precise clamping and low capacitance (<100 pF). Use Value: 40V VRWM aligns with 36V nominal DC bus; 64.5V VC prevents overvoltage stress on metering SoC and isolated communication ICs. | Use Scenario: Shielding RS-232/RS-485 transceiver VCC pins in point-of-sale terminals from ESD events during cable hot-plug operations. IC Role / Device Role / Timing Role: Fast-response TVS placed directly at transceiver power pin, limiting ESD-induced latch-up risk per IEC 61000-4-2 ±8 kV contact discharge. Use Value: Sub-1 ns response and <1 µA leakage preserve signal integrity and standby current budget in always-on retail hardware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ40A | Same electrical specs but in standard SMA package (higher RθJA = 140°C/W, taller profile) | Less suitable for ultra-thin or high-density layouts where D-FLAT's 1.1 mm height is required | Select when board space allows larger footprint and thermal derating is acceptable |
| 1.5SMC40A | Higher 1500W rating, DO-214AB package, 69.4V clamping at 21.7A | Over-specified for 600W use cases; requires larger PCB area and higher cost | Choose only if legacy design uses SMC footprint or future surge margin expansion is planned |
Compared with SMAJ40A and 1.5SMC40A, P6SMAJ40ADF delivers identical 40V/600W protection in a lower-profile, lower-inductance package-enabling tighter layout control and improved high-frequency transient suppression without compromising leakage or thermal performance on standard FR-4 boards.
Availability
P6SMAJ40ADF is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and smart energy metering requiring stable component supply and consistent surge immunity performance across production batches.
Supply support for P6SMAJ40ADF 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, computing, and automotive markets.
The P6SMAJ series belongs to Diodes' transient voltage suppressor product line, engineered specifically for compact, high-efficiency board-level surge protection in space-constrained applications demanding repeatable clamping performance and AEC-Q200 readiness.
FAQ
What is the maximum allowable PCB temperature rise during a 600W transient event?
The P6SMAJ40ADF's thermal resistance is defined for specific PCB pad configurations: 92°C/W for a 0.4" × 0.5" copper pad and 115°C/W for a 1" × 1" pad. Under a 600W 10/1000 µs pulse, junction temperature rise is transient and non-cumulative; steady-state limits apply only to repetitive surges. For single-event testing, no measurable bulk PCB temperature rise occurs due to pulse brevity.
Can P6SMAJ40ADF be used in bidirectional protection circuits?
No-P6SMAJ40ADF is a unidirectional TVS diode with anode/cathode polarity and asymmetric I-V characteristics. It conducts only during reverse overvoltage. For bidirectional protection (e.g., AC lines or differential data buses), a dedicated bidirectional part such as P6SMBJ40CA or two back-to-back unidirectional devices must be used.
How does the D-FLAT package affect surge clamping speed compared to SMA?
The D-FLAT package reduces lead inductance by ~30% versus standard SMA due to shorter internal bond wires and optimized terminal geometry. This lowers total loop inductance in the clamping path, enabling faster voltage rise suppression-critical for sub-100 ps ESD events-and reducing overshoot beyond VC during fast-rising transients.
Is P6SMAJ40ADF qualified to AEC-Q200 for automotive use?
While not explicitly AEC-Q200 certified in the DS38930 datasheet, P6SMAJ40ADF meets all underlying stress test conditions (temperature cycling, HAST, mechanical shock) referenced in AEC-Q200 Annex A. Diodes Incorporated offers AEC-Q200-qualified variants under the "-Q" suffix (e.g., P6SMAJ40ADF-Q); consult factory for qualification documentation and PPAP support.
P6SMAJ40ADF 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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 9.3A
- 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
P6SMAJ40ADF FAQ
1.How can I place an order for P6SMAJ40ADF through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMAJ40ADF 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 P6SMAJ40ADF reliable?
The price and inventory of P6SMAJ40ADF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMAJ40ADF is usually 5 days.
3.What payment methods are accepted for P6SMAJ40ADF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMAJ40ADF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMAJ40ADF?
P6SMAJ40ADF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMAJ40ADF 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 P6SMAJ40ADF?
For technical support, including P6SMAJ40ADF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMAJ40ADF requirements.
6.How does Aetrix verify that P6SMAJ40ADF is sourced from the original manufacturer or authorized distributors?
All P6SMAJ40ADF 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 P6SMAJ40ADF meets industry standards.
7.What is the process for return or replacement of P6SMAJ40ADF?
All P6SMAJ40ADF units undergo pre-shipment inspection (PSI). If there is an issue with P6SMAJ40ADF, 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 P6SMAJ40ADF part is unused and in its original packaging.
Return procedure for P6SMAJ40ADF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMAJ40ADF Tags
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