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Diodes Incorporated P6SMAJ75ADF
- Part No.:
- P6SMAJ75ADF
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
P6SMAJ75ADF.pdf
- Description:
- TVS DIODE 75VWM 121VC D-FLAT
- Quantity:
- Payment:
- Shipping:
Inventory:9,972
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Product details
Overview
P6SMAJ75ADF 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 75.0 V, breakdown voltage range of 83.3–95.8 V at 1.0 mA test current, clamping voltage of 121.0 V at 4.9 A peak pulse current, and D-FLAT package for space-constrained PCB layouts-used in industrial power supply input protection.
For engineers reviewing the P6SMAJ75ADF datasheet, P6SMAJ75ADF pinout, P6SMAJ75ADF application, or P6SMAJ75ADF equivalent, key selection criteria include clamping voltage margin vs. protected IC's absolute maximum rating, peak pulse current capability under IEC 61000-4-5 surge conditions, thermal resistance to PCB copper pad area, and RoHS-compliant matte tin terminations for lead-free reflow.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents <1.0 µA leakage at 75 V, then avalanches sharply above 83.3 V to limit transient energy. Its 10/1000 µs waveform response ensures compliance with IEC 61000-4-5 Level 4 (4 kV) surge immunity requirements.
The D-FLAT package enables low-profile mounting with defined thermal paths-RθJA = 92 °C/W on 0.4" × 0.5" 2 oz copper pad-supporting sustained 1.5 W average power dissipation at 75 °C lead temperature. Polarity is marked by cathode band; anode connects to protected line, cathode to ground.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W - sustains single 10/1000 µs surges up to 4.9 A without failure |
| Reverse Standoff Voltage (VRWM) | 75.0 V - maximum continuous DC voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 83.3–95.8 V @ 1.0 mA - guaranteed avalanche initiation window for predictable clamping onset |
| Clamping Voltage (VC) | 121.0 V @ 4.9 A - limits transient voltage seen by downstream circuitry during surge event |
| Max. Reverse Leakage (IR) | 1.0 µA @ 75 V - negligible standby current draw in nominal operating condition |
| Thermal Resistance (RθJA) | 92 °C/W - defines temperature rise per watt on standard 0.4" × 0.5" copper pad |
| Operating Temperature | −55 to +150 °C - supports deployment in automotive engine compartments and industrial enclosures |
Pinout & Package
Package: D-FLAT - low-profile surface-mount package with 2.25–2.95 mm width (D), 3.95–4.60 mm length (E), and 0.90–1.10 mm height (A); molded plastic case rated UL 94V-0; cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Surge return path | Connected to system ground; carries full transient current during clamping |
| 2 (Anode) | Protected line interface | Connected to line being safeguarded (e.g., 48 V DC input); voltage referenced to cathode |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Ensures stable breakdown characteristics and long-term reliability under repeated surge stress |
| 600 W peak pulse rating | Meets IEC 61000-4-5 4 kV surge immunity with margin for aging and temperature derating |
| D-FLAT low-profile package | Reduces board footprint by >40% vs. SMA while maintaining thermal performance via optimized pad layout |
| RoHS-compliant matte tin finish | Enables compatibility with lead-free reflow profiles (peak 260 °C) without intermetallic degradation |
| Halogen- and antimony-free "Green" construction | Complies with IPC-1752A reporting requirements and EU environmental directives |
Applications
| Industrial PLC I/O Protection | Telecom Power Input Stage |
|---|---|
|
Use Scenario: Protecting 24 V/48 V digital input modules from induced lightning surges on field wiring. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between input terminal and chassis ground. Use Value: Clamps transients to ≤121 V, keeping input buffer ICs (e.g., TI ISO1212) within 125 V abs max rating. |
Use Scenario: Safeguarding primary-side DC-DC converter inputs in PoE-powered network switches. IC Role / Device Role / Timing Role: Front-end surge limiter ahead of active OR-ing FETs and controller ICs. Use Value: Absorbs 600 W surge energy without latch-up, preserving upstream fuse integrity and enabling Class 4 surge compliance. |
| Automotive Body Control Module | Medical Equipment AC/DC Adapter Input |
|
Use Scenario: Suppressing load-dump transients on 12 V battery-fed microcontroller power rails. IC Role / Device Role / Timing Role: Secondary-level clamping device after primary fuse and LC filter. Use Value: Responds in <1 ns to clamp 120 V/100 ms load dump to 121 V, preventing MCU brownout or reset. |
Use Scenario: Guarding isolated AC/DC adapter secondary outputs against ESD and fast transients. IC Role / Device Role / Timing Role: Output-side TVS across 5 V/12 V output rails prior to connector pins. Use Value: Limits ESD-induced voltage overshoot to <121 V, protecting downstream USB controllers and isolation barriers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75A | Same 75 V VRWM, but SMB package (higher RθJA = 110 °C/W); 600 W rating at 25 °C only | Less effective thermal management on dense boards; requires larger copper area for same power handling | Select when legacy SMB footprint is fixed and ambient temperature remains <60 °C |
| 1.5KE75A | Through-hole DO-201 package; identical electrical specs but 1.5 kW rating (derated to 600 W at 10/1000 µs) | Not suitable for automated SMT assembly; used where mechanical robustness outweighs board space constraints | Choose for high-vibration environments (e.g., rail transport) where solder joint reliability is critical |
Compared with SMBJ75A and 1.5KE75A, P6SMAJ75ADF delivers superior thermal performance in ultra-compact form factor-enabling higher sustained surge duty cycles in space-limited industrial and telecom designs without compromising clamping accuracy or leakage.
Availability
P6SMAJ75ADF is available at Aetrix Electronics and suitable for industrial PLC I/O protection, telecom power input stages, and automotive body control modules requiring stable component supply with full traceability and lifecycle continuity.
Supply support for P6SMAJ75ADF 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 and manufacturing operations across Asia and the Americas.
This device belongs to the P6SMAJ series of surface-mount TVS diodes engineered specifically for high-reliability transient suppression in industrial, telecom, and automotive power systems-emphasizing low clamping ratio, tight VBR tolerance, and green packaging compliance.
FAQ
What is the maximum allowable PCB pad size for optimal thermal performance of P6SMAJ75ADF?
For RθJA = 92 °C/W, Diodes Incorporated specifies a 0.4" × 0.5" (10.2 mm × 12.7 mm), 2 oz copper pad. Reducing pad area increases thermal resistance linearly-e.g., halving pad area raises RθJA to ~130 °C/W, limiting safe peak pulse repetition rate.
Does P6SMAJ75ADF meet IEC 61000-4-5 surge immunity standards?
Yes-its 600 W rating at 10/1000 µs waveform corresponds to 4 kV line-to-ground surge per IEC 61000-4-5 Ed. 3, Level 4, when mounted per recommended pad layout and paired with appropriate series impedance (e.g., 2 Ω inline resistor).
Can P6SMAJ75ADF be used in bidirectional configurations?
No-it is strictly unidirectional. Bidirectional operation requires two devices in series opposing configuration or a dedicated bidirectional TVS like P6SMBJ75CA. Using P6SMAJ75ADF in reverse bias beyond VRWM risks permanent damage due to lack of symmetric avalanche structure.
What is the meaning of the "NR" marking code on P6SMAJ75ADF?
"NR" is the Diodes Incorporated top-side laser marking code uniquely assigned to P6SMAJ75ADF per the Electrical Characteristics Table. It enables traceability to voltage grade, wafer lot, and production date (YWW format), and distinguishes it from adjacent variants like P6SMAJ70ADF ("NP") or P6SMAJ78ADF ("NT").
P6SMAJ75ADF 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):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 4.9A
- 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
P6SMAJ75ADF FAQ
1.How can I place an order for P6SMAJ75ADF through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMAJ75ADF 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 P6SMAJ75ADF reliable?
The price and inventory of P6SMAJ75ADF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMAJ75ADF is usually 5 days.
3.What payment methods are accepted for P6SMAJ75ADF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMAJ75ADF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMAJ75ADF?
P6SMAJ75ADF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMAJ75ADF 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 P6SMAJ75ADF?
For technical support, including P6SMAJ75ADF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMAJ75ADF requirements.
6.How does Aetrix verify that P6SMAJ75ADF is sourced from the original manufacturer or authorized distributors?
All P6SMAJ75ADF 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 P6SMAJ75ADF meets industry standards.
7.What is the process for return or replacement of P6SMAJ75ADF?
All P6SMAJ75ADF units undergo pre-shipment inspection (PSI). If there is an issue with P6SMAJ75ADF, 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 P6SMAJ75ADF part is unused and in its original packaging.
Return procedure for P6SMAJ75ADF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMAJ75ADF Tags
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