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Diodes Incorporated P6SMAJ85ADF
- Part No.:
- P6SMAJ85ADF
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
P6SMAJ85ADF.pdf
- Description:
- TVS DIODE 85VWM 137VC D-FLAT
- Quantity:
- Payment:
- Shipping:
Inventory:5,961
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Product details
Overview
P6SMAJ85ADF 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 85.0 V, breakdown voltage range of 94.4–108.2 V at 1.0 mA test current, clamping voltage of 137.0 V at 4.4 A peak pulse current, and fast response time under 10 ns. It is used in industrial power supplies to protect downstream regulators from lightning-induced surges.
For engineers reviewing the P6SMAJ85ADF datasheet, P6SMAJ85ADF pinout, P6SMAJ85ADF application, or P6SMAJ85ADF equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, thermal resistance under PCB layout constraints, peak pulse current capability for IEC 61000-4-5 compliance, and D-FLAT package compatibility with high-density layouts.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents <1.0 µA leakage at 85 V, but avalanches rapidly when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and long-term reliability under repetitive surge stress.
The device uses a low-profile D-FLAT package with cathode-band polarity marking and matte tin–annealed copper leadframe. Thermal performance depends on PCB copper pad area-RθJA ranges from 92 °C/W (0.4" × 0.5" pad) to 115 °C/W (1" × 1" pad)-enabling design flexibility across cost- and performance-tier applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W - sustains single 10/1000 µs transients without failure per JEDEC standards |
| Reverse Standoff Voltage (VRWM) | 85.0 V - maximum continuous DC operating voltage before leakage exceeds 1.0 µA |
| Breakdown Voltage (VBR) | 94.4–108.2 V @ 1.0 mA - defines reliable avalanche initiation window for predictable clamping onset |
| Clamping Voltage (VC) | 137.0 V @ 4.4 A IPP - limits voltage seen by protected circuit during worst-case surge event |
| Peak Pulse Current (IPP) | 4.4 A - maximum non-repetitive surge current the device can divert while maintaining VC ≤ 137 V |
| Junction-to-Ambient RθJA | 92–115 °C/W - determines temperature rise under sustained surge duty; requires defined PCB copper area |
Pinout & Package
Package: D-FLAT - low-profile surface-mount package (2.25–2.95 mm width, 3.95–4.60 mm length, 0.90–1.10 mm height), UL 94V-0 rated molded plastic case with cathode band polarity indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Anode-side connection point for unidirectional clamping | Connected to protected line; conducts surge current to ground when voltage exceeds VBR |
| 2 (Anode) | Reference/ground return path | Must be routed to low-impedance system ground plane to minimize clamping voltage overshoot |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Ensures stable VBR tolerance and reduced parameter drift over temperature and lifetime |
| Low-profile D-FLAT package | Reduces board space by >40% vs. SMA; enables routing under adjacent components in dense layouts |
| Lead-free, halogen-free, RoHS-compliant finish | Meets IPC-J-STD-020 Level 1 moisture sensitivity and global environmental compliance mandates |
| Fast response time (<10 ns) | Clamps transients before sensitive downstream ICs experience overstress, critical for USB/RS-485 interfaces |
Applications
| Industrial Power Input Protection | DC Motor Drive Control Lines |
|---|---|
Use Scenario: 24–48 V DC input stage of programmable logic controllers exposed to inductive switching and lightning-induced surges. IC Role / Device Role: Unidirectional shunt clamp placed between input rail and chassis ground. Use Value: Limits transient voltage to ≤137 V, protecting 100 V-rated input capacitors and upstream rectifiers from catastrophic failure. |
Use Scenario: Protection of H-bridge gate driver enable signals against back-EMF coupling from motor windings. IC Role / Device Role: Signal-line TVS on isolated control traces routed near high-current motor phases. Use Value: Suppresses sub-100 ns spikes up to 4.4 A without adding capacitance that would distort PWM timing. |
| Telecom Remote Power Feeds | Automotive Body Control Modules |
Use Scenario: 48 V phantom power feed in PoE-powered remote radio units subjected to induced surges on outdoor cabling. IC Role / Device Role: Primary overvoltage clamp on DC feed line before DC/DC converter input. Use Value: Withstands 600 W pulses per IEC 61000-4-5 Level 4, enabling compliance without external series impedance. |
Use Scenario: LIN bus line protection in door module ECUs where battery dump events cause 120 V transients. IC Role / Device Role: Unidirectional TVS on LIN data line referenced to vehicle chassis ground. Use Value: Clamps to 137 V within 10 ns, preserving signal integrity while meeting ISO 7637-2 Pulse 5a immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85A | Same VRWM (85 V) and VC (137 V), but SMB package (higher RθJA = 135 °C/W) and lower IPP (4.0 A) | Less effective thermal dissipation on compact PCBs; suitable only where surge repetition rate is low | Select when legacy SMB footprint is fixed and peak surge energy is ≤50% of P6SMAJ85ADF rating |
| 1.5SMC85A | Higher PPK (1500 W), larger SMC package (5.3 mm × 4.5 mm), RθJA ≈ 100 °C/W, VC = 137 V | Better surge handling but occupies >2.5× board area; incompatible with fine-pitch layouts | Choose for high-energy environments (e.g., railway traction systems) where space is not constrained |
Compared with SMBJ85A and 1.5SMC85A, P6SMAJ85ADF delivers optimal balance of surge robustness (600 W), compact D-FLAT footprint, and thermal performance on standard FR-4-making it preferred for space-constrained industrial and automotive modules requiring repeatable IEC/ISO compliance.
Availability
P6SMAJ85ADF is available at Aetrix Electronics and suitable for industrial power input protection, DC motor drive control lines, telecom remote power feeds, and automotive body control modules requiring stable component supply and full traceability.
Supply support for P6SMAJ85ADF 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 suppression portfolio, engineered specifically for high-power-density, surface-mount overvoltage protection in harsh electromagnetic environments where fast response and stable clamping are mission-critical.
FAQ
What is the maximum operating temperature for P6SMAJ85ADF?
The P6SMAJ85ADF has an operating junction temperature range of –55 °C to +150 °C. Its thermal resistance (RθJA) varies from 92 °C/W to 115 °C/W depending on PCB copper pad size, so maximum ambient temperature must be derated accordingly-e.g., at 75 °C ambient with 100 °C/W RθJA, junction temperature remains within limit under no-surge conditions.
Can P6SMAJ85ADF be used in bidirectional configurations?
No-P6SMAJ85ADF is a unidirectional TVS diode with cathode-anode polarity and is not rated for reverse-biased operation. For AC or bidirectional surge protection, use the complementary P6SMAJ85CA (bidirectional variant) which has symmetric clamping in both polarities and identical VRWM/VC specs.
How does the D-FLAT package affect soldering process compatibility?
The D-FLAT package uses matte tin–annealed copper leadframe and complies with MIL-STD-202 Method 208 for solderability. Its low profile (≤1.1 mm height) and gull-wing–like terminals support standard reflow profiles (peak 260 °C, 60 s max), but require precise stencil aperture design (0.25 mm thickness, 100% area ratio) to prevent bridging on 0.4 mm pitch pads.
Is P6SMAJ85ADF compliant with AEC-Q200 for automotive use?
P6SMAJ85ADF is not AEC-Q200 qualified. While it meets industrial temperature range (–55 °C to +150 °C) and RoHS/halogen-free requirements, Diodes Incorporated does not list it in their AEC-Q200-certified TVS portfolio. For automotive-grade applications, consider the AEC-Q200–qualified SMAJ85A or SMCJ85A series instead.
P6SMAJ85ADF 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):
- 85V
- Voltage - Breakdown (Min):
- 94.4V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 4.4A
- 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
P6SMAJ85ADF FAQ
1.How can I place an order for P6SMAJ85ADF through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMAJ85ADF 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 P6SMAJ85ADF reliable?
The price and inventory of P6SMAJ85ADF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMAJ85ADF is usually 5 days.
3.What payment methods are accepted for P6SMAJ85ADF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMAJ85ADF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMAJ85ADF?
P6SMAJ85ADF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMAJ85ADF 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 P6SMAJ85ADF?
For technical support, including P6SMAJ85ADF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMAJ85ADF requirements.
6.How does Aetrix verify that P6SMAJ85ADF is sourced from the original manufacturer or authorized distributors?
All P6SMAJ85ADF 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 P6SMAJ85ADF meets industry standards.
7.What is the process for return or replacement of P6SMAJ85ADF?
All P6SMAJ85ADF units undergo pre-shipment inspection (PSI). If there is an issue with P6SMAJ85ADF, 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 P6SMAJ85ADF part is unused and in its original packaging.
Return procedure for P6SMAJ85ADF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMAJ85ADF Tags
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