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Diodes Incorporated P6SMAJ8.5ADF
- Part No.:
- P6SMAJ8.5ADF
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
P6SMAJ8.5ADF.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC D-FLAT
- Quantity:
- Payment:
- Shipping:
Inventory:4,486
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Product details
Overview
P6SMAJ8.5ADF 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 reverse standoff voltage of 8.5V, breakdown voltage range of 9.44–10.82V at 1.0mA test current, clamping voltage of 14.4V at 41.7A peak pulse current, and D-FLAT package for space-constrained PCB layouts-used in industrial power supplies and automotive body control modules.
For engineers reviewing the P6SMAJ8.5ADF datasheet, P6SMAJ8.5ADF pinout, P6SMAJ8.5ADF application, or P6SMAJ8.5ADF equivalent, this page delivers verified electrical parameters, thermal resistance values (RθJA = 92°C/W on 0.4"×0.5" FR-4), polarity marking (cathode band), and direct comparison with functionally aligned TVS alternatives for ESD/surge protection design validation.
Technical Context
This unidirectional TVS diode operates as a clamping device that remains high-impedance below 8.5V VRWM and rapidly transitions to low-impedance conduction above its 9.44V minimum breakdown threshold. Its glass-passivated junction ensures stable leakage performance (<10µA at VRWM) and repeatable clamping behavior under 10/1000µs surge transients.
The D-FLAT package enables low-inductance mounting with defined thermal paths: RθJT = 57°C/W and RθJA = 92°C/W on a 0.4"×0.5", 2oz copper pad layout. It sustains 60A non-repetitive forward surge current (8.3ms half-sine) and operates across –55°C to +150°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - Sustains single 10×1000µs surges without failure under specified board layout |
| Reverse Standoff Voltage (VRWM) | 8.5V - Maximum continuous DC or RMS voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 9.44–10.82V @ 1.0mA - Confirmed conduction onset window for reliable overvoltage triggering |
| Clamping Voltage (VC) | 14.4V @ 41.7A - Maximum voltage seen by protected circuit during rated surge event |
| Peak Pulse Current (IPP) | 41.7A - Peak current handled at VC; defines surge immunity level per IEC 61000-4-5 |
| Reverse Leakage (IR) | 10µA @ 8.5V - Low standby power loss and minimal impact on high-impedance sensing nodes |
| Junction-to-Ambient RθJA | 92°C/W - Thermal performance on 0.4"×0.5" 2oz FR-4 pad; enables accurate power derating |
Pinout & Package
Package: D-FLAT surface-mount package with cathode band marking; dimensions: 4.65mm × 2.80mm × 1.10mm (L × W × H); molded plastic case, UL 94V-0 rated; matte tin annealed terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Protected Circuit Anode Connection | Connected to positive rail or signal line; absorbs positive transients when referenced to ground |
| 2 (Anode) | Ground Reference Terminal | Low-inductance path to system ground; critical for effective clamping response |
Key Features
| Feature | Design Value |
|---|---|
| 600W Peak Pulse Rating | Enables robust protection against IEC 61000-4-5 Level 4 surges (4kV/2Ω) on 12V systems |
| Glass-Passivated Junction | Ensures long-term stability of VBR and IR across temperature and humidity stress |
| D-FLAT Low-Profile Package | Reduces PCB area by >40% vs. SMA; supports automated placement and reflow compatibility |
| RoHS & Halogen-Free Compliance | Meets EU RoHS 2 and green manufacturing requirements (<900ppm Br/Cl, <1000ppm Sb) |
| Fast Response Time | Sub-nanosecond clamping initiation limits voltage overshoot during ESD events (IEC 61000-4-2) |
Applications
| Industrial Power Input Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: 12V DC input stage of programmable logic controllers exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between input connector and upstream fuse/regulator. Use Value: Limits transient voltage to ≤14.4V during 41.7A surges, preventing damage to 16V-rated input capacitors and LDOs. |
Use Scenario: CAN/LIN bus power rail protection in door module ECUs subject to battery reversal and jump-start spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VBAT-supplied microcontroller power domain. Use Value: Maintains <10µA leakage at 8.5V, avoiding battery drain while clamping 10/1000µs transients to safe levels. |
| USB-C Port VBUS Protection | Smart Meter AC/DC Auxiliary Supply |
Use Scenario: VBUS line protection in USB-C receptacles where hot-plug insertion induces 15kV ESD events. IC Role / Device Role / Timing Role: First-line TVS on VBUS path before USB PD controller and load switch. Use Value: Sub-ns response clamps ESD to <14.4V, preserving ±5% VBUS regulation tolerance of downstream buck converters. |
Use Scenario: Auxiliary 9V rail protection in utility smart meters powered from rectified AC mains. IC Role / Device Role / Timing Role: Surge suppression on transformer-coupled auxiliary supply output. Use Value: Withstands 60A 8.3ms surges from lightning-induced coupling, ensuring meter uptime during grid disturbances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5A | Same 8.5V VRWM, but 400W rating and SMA package (higher RθJA = 115°C/W) | Larger footprint; less suitable for dense automotive PCBs requiring D-FLAT thermal performance | Select when cost sensitivity outweighs board space constraints and thermal margin is sufficient |
| 1.5SMC8.5A | 600W rating, but SMC package (7.1mm × 6.2mm) and higher clamping voltage (15.0V @ 40A) | Higher profile and 0.6V higher VC reduces margin for 12V rail ICs with 15V abs max ratings | Prefer only when legacy SMC footprint compatibility is mandatory and VC margin allows |
Compared with SMAJ8.5A and 1.5SMC8.5A, P6SMAJ8.5ADF delivers superior thermal efficiency (92°C/W vs. ≥115°C/W), smaller footprint (D-FLAT vs. SMA/SMC), and tighter clamping (14.4V vs. ≥15.0V), making it optimal for space- and thermal-constrained 12V systems.
Availability
P6SMAJ8.5ADF is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control modules, USB-C port VBUS protection, and smart meter auxiliary supply designs requiring stable component supply and full RoHS/halogen-free compliance.
Supply support for P6SMAJ8.5ADF 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.
P6SMAJ8.5ADF belongs to the P6SMAJxxADF series of 600W surface-mount TVS diodes engineered specifically for compact, high-efficiency transient suppression in automotive and industrial power systems where thermal performance and board space are critical.
FAQ
What is the maximum operating temperature for P6SMAJ8.5ADF?
The P6SMAJ8.5ADF has an operating junction temperature range of –55°C to +150°C. Its thermal resistance (RθJA) is 92°C/W when mounted on a 0.4"×0.5", 2oz FR-4 copper pad, enabling reliable operation up to +125°C ambient in typical automotive under-hood environments with appropriate power derating.
How does the D-FLAT package improve surge handling versus SMA?
The D-FLAT package provides lower thermal resistance (RθJA = 92°C/W vs. 115°C/W for SMA) due to optimized copper pad contact area and shorter thermal path. This allows sustained 600W pulse dissipation with less junction temperature rise, improving reliability during repetitive surge events in industrial applications.
Is P6SMAJ8.5ADF suitable for bidirectional signal line protection?
No. P6SMAJ8.5ADF is a unidirectional TVS diode with cathode-anode polarity. For bidirectional protection (e.g., RS-485, USB data lines), a symmetric device such as P6SMBJ8.5CA or SMAJ8.5CA must be used. Using P6SMAJ8.5ADF on AC-coupled signals risks forward conduction and latch-up.
What is the meaning of the "KT" marking code on P6SMAJ8.5ADF?
The "KT" marking code on the top surface identifies the P6SMAJ8.5ADF variant per Diodes Incorporated's standard coding scheme. It corresponds exclusively to the 8.5V VRWM version within the P6SMAJxxADF family and is used for traceability and visual identification during assembly and inspection.
P6SMAJ8.5ADF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 2-SMD, Flat Leads
- Series:
- SMAJ
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 41.7A
- 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
P6SMAJ8.5ADF FAQ
1.How can I place an order for P6SMAJ8.5ADF through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMAJ8.5ADF 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 P6SMAJ8.5ADF reliable?
The price and inventory of P6SMAJ8.5ADF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMAJ8.5ADF is usually 5 days.
3.What payment methods are accepted for P6SMAJ8.5ADF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMAJ8.5ADF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMAJ8.5ADF?
P6SMAJ8.5ADF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMAJ8.5ADF 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 P6SMAJ8.5ADF?
For technical support, including P6SMAJ8.5ADF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMAJ8.5ADF requirements.
6.How does Aetrix verify that P6SMAJ8.5ADF is sourced from the original manufacturer or authorized distributors?
All P6SMAJ8.5ADF 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 P6SMAJ8.5ADF meets industry standards.
7.What is the process for return or replacement of P6SMAJ8.5ADF?
All P6SMAJ8.5ADF units undergo pre-shipment inspection (PSI). If there is an issue with P6SMAJ8.5ADF, 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 P6SMAJ8.5ADF part is unused and in its original packaging.
Return procedure for P6SMAJ8.5ADF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMAJ8.5ADF Tags
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