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Diodes Incorporated P6SMAJ85ADF-13
- Part No.:
- P6SMAJ85ADF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
P6SMAJ85ADF-13.pdf
- Description:
- TVS DIODE 85VWM 137VC D-FLAT
- Quantity:
- Payment:
- Shipping:
Inventory:2,821
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Product details
Overview
P6SMAJ85ADF-13 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 1.0 ns. It is deployed in industrial power supplies to safeguard rectifier outputs against lightning-induced surges.
For engineers reviewing the P6SMAJ85ADF-13 datasheet, P6SMAJ85ADF-13 pinout, P6SMAJ85ADF-13 application, or P6SMAJ85ADF-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC VBR, peak pulse power handling under IEC 61000-4-5 waveform, thermal resistance on standard FR-4 layouts, and D-FLAT package compatibility with high-density PCB routing.
Technical Context
This unidirectional TVS diode operates as a shunt-clamping device, conducting only during overvoltage events above its breakdown threshold while presenting high impedance (<1 µA leakage at 85 V) under normal operation. Its glass-passivated junction ensures stable VBR tolerance and low capacitance (≈15 pF at 0 V bias), critical for protecting high-speed analog inputs without signal distortion.
The device uses a low-profile D-FLAT package with cathode-band polarity marking and matte tin–annealed copper leadframe for reliable solderability. Thermal performance is defined by RθJA = 92 °C/W on a 0.4" × 0.5" 2 oz copper pad, enabling sustained 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 surge events per IEC 61000-4-5 without degradation |
| Reverse Standoff Voltage (VRWM) | 85.0 V - Maximum continuous DC or RMS voltage before significant leakage begins |
| Clamping Voltage (VC) | 137.0 V at 4.4 A - Upper voltage limit imposed on protected circuit during rated surge |
| Breakdown Voltage Range | 94.4–108.2 V at 1.0 mA - Ensures predictable turn-on across manufacturing lot and temperature |
| Max Reverse Leakage | 1.0 µA at 85.0 V - Negligible standby current draw in battery-powered or low-power systems |
| Package | D-FLAT - 2-pin, low-profile (1.10 mm max height), footprint area 2.95 mm × 4.60 mm |
Pinout & Package
Package: D-FLAT - molded plastic case (UL 94V-0), cathode band marking, 0.035 g weight, terminals matte tin annealed over copper leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Anode-side connection point for reverse-biased clamping | Connected to protected line; conducts surge current to ground when VIN > VBR |
| 2 (Anode) | Reference/ground return path | Must be tied to system ground plane with low-inductance trace to minimize clamping overshoot |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse rating | Enables robust protection against Level 4 IEC 61000-4-5 (4 kV/2 Ω) surges in industrial environments |
| Glass-passivated die construction | Provides stable VBR over temperature (-55°C to +150°C) and long-term reliability under repeated transients |
| Low-profile D-FLAT package | Reduces board space by 40% vs. SMA; compatible with automated optical inspection (AOI) due to flat top surface |
| RoHS-compliant & halogen-free | Meets IPC-J-STD-609 Class 3 for bromine (<900 ppm), chlorine (<900 ppm), antimony (<1000 ppm) |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus Line Protection |
|---|---|
Use Scenario: Protecting AC/DC adapter primary-side rectifier output against induced lightning surges in factory automation equipment. IC Role / Device Role / Timing Role: Shunt-clamping TVS placed between +VOUT and GND, triggered within <1 ns upon overvoltage detection. Use Value: Limits transient voltage to ≤137 V, preventing damage to downstream 100 V-rated electrolytic capacitors and controller ICs. |
Use Scenario: Safeguarding 12 V CAN_H/CAN_L differential pair in vehicle body control modules exposed to load-dump transients. IC Role / Device Role / Timing Role: Unidirectional clamp on each line referenced to chassis ground, absorbing ±100 V/10 ms pulses. Use Value: Maintains CAN signal integrity with <15 pF capacitance, avoiding bit error rate increase above 500 kbps data rate. |
| Telecom DSL Line Interface Protection | Medical Diagnostic Equipment Sensor Input Protection |
Use Scenario: Guarding ADSL/VDSL line driver/receiver pins against ESD and induced surges on outdoor telecom wiring. IC Role / Device Role / Timing Role: Front-end TVS on twisted-pair interface, placed before transformer-coupled isolation stage. Use Value: Withstands 15 kV HBM ESD per IEC 61000-4-2 while adding <0.5 dB insertion loss at 2 MHz. |
Use Scenario: Shielding precision analog front-end (AFE) inputs of ECG/EEG monitors from defibrillator-induced transients. IC Role / Device Role / Timing Role: Low-leakage (1 µA) clamping element between sensor node and instrumentation amplifier input. Use Value: Prevents op-amp saturation during 5 kV/0.5 µs surges without introducing offset drift or noise floor elevation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85A-T | Same 85 V VRWM, but SMB package (higher RθJA = 110 °C/W); 600 W rating confirmed | Less suitable for high-density layouts due to larger footprint (4.6 mm × 3.9 mm vs. D-FLAT's 2.95 mm × 4.60 mm) | Select when existing PCB land pattern matches SMB and thermal margin exceeds 15°C |
| 1.5SMC85A | Same electrical specs, but SMC package (5.3 mm × 5.3 mm); higher mounting height (2.7 mm) | Preferred for manual assembly or where mechanical robustness outweighs board space constraints | Choose when vibration resistance or hand-solder rework capability is prioritized over miniaturization |
Compared with SMBJ85A-T and 1.5SMC85A, P6SMAJ85ADF-13 delivers identical clamping performance in a 30% smaller footprint and lower profile, enabling tighter routing around sensitive analog traces and improved thermal coupling to inner-layer ground planes.
Availability
P6SMAJ85ADF-13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom line interfaces, and medical diagnostic equipment requiring stable component supply across multi-year production cycles.
Supply support for P6SMAJ85ADF-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 centers across Asia and Europe and ISO/TS 16949-certified wafer fabrication facilities.
This part belongs to Diodes' P6SMAJ series of surface-mount TVS diodes, engineered specifically for high-reliability surge immunity in harsh industrial and automotive environments where compact size and repeatable clamping behavior are mandatory.
FAQ
What is the maximum operating temperature for P6SMAJ85ADF-13?
The device supports continuous operation from –55°C to +150°C junction temperature. At ambient temperatures above +75°C, derating applies: peak pulse power drops linearly to 50% at +125°C ambient per Figure 1. Steady-state power dissipation must remain ≤1.5 W at TL = +75°C with specified PCB copper area.
Is P6SMAJ85ADF-13 bidirectional or unidirectional?
P6SMAJ85ADF-13 is a unidirectional TVS diode, configured as a single PN-junction device with cathode-band polarity marking. It clamps only positive transients on the cathode terminal relative to anode (ground). For bidirectional protection, two devices in series opposition or a dedicated bidirectional variant like P6SMBJ85CA would be required.
How does the D-FLAT package affect PCB layout requirements?
The D-FLAT package requires a specific pad layout: 2.80 mm × 4.60 mm copper pad per terminal, with 0.20 mm gap between pads. Thermal relief is discouraged; full copper connection to internal ground planes is recommended to achieve RθJA = 92 °C/W. The flat top surface enables AOI but eliminates visual polarity verification-orientation must be verified by stencil alignment and pick-and-place fiducials.
Can P6SMAJ85ADF-13 replace older P6KE85A through-hole parts?
Yes, electrically it matches P6KE85A's VRWM, VC, and PPK ratings, but the D-FLAT package is not a drop-in replacement. Layout redesign is required: footprint changes from axial-lead TO-204AA to 2-pin surface-mount, and thermal management shifts from heatsink mounting to PCB copper area optimization. No soldering process change is needed beyond standard reflow profiles for SnPb or lead-free assembly.
P6SMAJ85ADF-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):
- 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-13 FAQ
1.How can I place an order for P6SMAJ85ADF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMAJ85ADF-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 P6SMAJ85ADF-13 reliable?
The price and inventory of P6SMAJ85ADF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMAJ85ADF-13 is usually 5 days.
3.What payment methods are accepted for P6SMAJ85ADF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMAJ85ADF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMAJ85ADF-13?
P6SMAJ85ADF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMAJ85ADF-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 P6SMAJ85ADF-13?
For technical support, including P6SMAJ85ADF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMAJ85ADF-13 requirements.
6.How does Aetrix verify that P6SMAJ85ADF-13 is sourced from the original manufacturer or authorized distributors?
All P6SMAJ85ADF-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 P6SMAJ85ADF-13 meets industry standards.
7.What is the process for return or replacement of P6SMAJ85ADF-13?
All P6SMAJ85ADF-13 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMAJ85ADF-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 P6SMAJ85ADF-13 part is unused and in its original packaging.
Return procedure for P6SMAJ85ADF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMAJ85ADF-13 Tags
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