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Diodes Incorporated P6SMAJ78ADFQ-13
- Part No.:
- P6SMAJ78ADFQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
P6SMAJ78ADFQ-13.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR D-F
- Quantity:
- Payment:
- Shipping:
Inventory:4,782
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Product details
Overview
P6SMAJ78ADFQ-13 from Diodes Incorporated is a 600W surface-mount transient voltage suppressor (TVS) diode designed for automotive-grade overvoltage protection in DC power rails and signal lines. It features a reverse standoff voltage of 78.0 V, breakdown voltage range of 86.7–99.7 V at 1.0 mA test current, clamping voltage of 126.0 V at 4.7 A peak pulse current, and AEC-Q101 qualification for under-hood and body electronics applications.
For engineers reviewing the P6SMAJ78ADFQ-13 datasheet, P6SMAJ78ADFQ-13 pinout, P6SMAJ78ADFQ-13 application, or P6SMAJ78ADFQ-13 equivalent, key selection criteria include clamping performance at 10/1000 µs waveform, thermal resistance (57 °C/W junction-to-terminal on 0.4" × 0.5" PCB pad), D-FLAT package footprint compatibility, and compliance with automotive PPAP and IATF16949 manufacturing requirements.
Technical Context
This unidirectional TVS diode operates in avalanche mode to clamp transient surges above its breakdown threshold while maintaining low leakage (<1.0 µA at 78.0 V) and fast response time (<1.0 ns). Its glass-passivated die construction ensures stable electrical characteristics across temperature and long-term reliability under repetitive surge stress.
The device is optimized for single-pulse suppression per IEC 61000-4-5 (10 × 1000 µs waveform), delivering 600 W peak pulse power dissipation with a maximum clamping voltage of 126.0 V at 4.7 A. Thermal design must account for junction-to-terminal resistance of 57 °C/W on minimal copper pads and 92 °C/W junction-to-ambient on standard FR-4 layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W - Sustains single 10/1000 µs transients without failure |
| Reverse Standoff Voltage | 78.0 V - Maximum continuous DC operating voltage before conduction |
| Breakdown Voltage | 86.7–99.7 V @ 1.0 mA - Confirmed avalanche onset range for reliable triggering |
| Clamping Voltage | 126.0 V @ 4.7 A - Maximum voltage seen by protected circuit during rated surge |
| Peak Pulse Current | 4.7 A - Peak current handled at specified clamping voltage under 10/1000 µs waveform |
| Leakage Current | ≤1.0 µA @ 78.0 V - Minimal standby power loss and signal integrity impact |
| Junction-to-Terminal Rθ | 57 °C/W - Enables thermal management on compact 0.4" × 0.5" copper pads |
Pinout & Package
Package: D-FLAT surface-mount package (2.25–2.95 mm width, 3.95–4.60 mm length, 0.90–1.10 mm height), molded plastic case with UL 94V-0 flammability rating, cathode band polarity indicator, and matte tin annealed copper lead-frame.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | High-side connection to protected line | Connected to supply rail or signal line requiring overvoltage clamping |
| 2 (Anode) | Low-side reference to ground or return path | Must be tied to low-impedance ground plane to ensure effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, lighting, and infotainment systems |
| D-FLAT low-profile package | Height ≤1.10 mm enables use in space-constrained modules and automated SMT assembly |
| Glass passivated die | Ensures stable breakdown voltage and leakage performance over 150 °C operating range |
| Lead-free & halogen-free | Complies with RoHS 3 (2015/863/EU) and Diodes Inc.'s "Green" definition (<900 ppm Br/Cl, <1000 ppm Sb) |
| 600 W peak pulse rating | Meets ISO 7637-2 Pulse 1, 2a, 3a/b and IEC 61000-4-5 Level 3 surge immunity requirements |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 24 V CAN/LIN bus interface circuits from load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between signal line and chassis ground. Use Value: Limits transient voltage to ≤126.0 V during 4.7 A surges, preventing damage to transceivers and microcontrollers. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers against field-wiring induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on discrete optocoupler input stage. Use Value: Maintains ≤1.0 µA leakage at 78 V standoff, ensuring clean logic-level detection without false triggering. |
| Automotive LED Headlamp Driver | Telecom Power Supply Input Stage |
Use Scenario: Suppressing load dump spikes on 12 V/24 V LED driver inputs in adaptive front-lighting systems. IC Role / Device Role / Timing Role: Front-end transient suppressor upstream of buck controller IC. Use Value: Withstands 600 W pulses without degradation, preserving driver IC lifetime under repeated 12 V battery disconnect events. |
Use Scenario: Clamping induced surges on 48 V telecom power distribution boards exposed to lightning-induced coupling. IC Role / Device Role / Timing Role: Secondary-stage TVS after primary MOV/GDT protection network. Use Value: Provides precise 126.0 V clamping with fast <1 ns response, reducing let-through energy to downstream DC-DC converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ78A-Q | Same 78 V standoff, but non-automotive grade; no AEC-Q101 or PPAP support | Limited to commercial/industrial use; not qualified for automotive production | Select when cost sensitivity outweighs automotive change control and traceability requirements |
| 1.5SMC78A | Higher 1.5 kW rating, DO-214AB package (larger footprint), 132 V clamping at 11.4 A | Better suited for high-energy surges where board space allows larger package | Choose only if system-level testing confirms need for >600 W rating and layout accommodates wider 7.0 mm body |
Compared with SMAJ78A-Q and 1.5SMC78A, P6SMAJ78ADFQ-13 uniquely delivers automotive-grade reliability in the smallest D-FLAT footprint while maintaining tight 126.0 V clamping-making it optimal for space-constrained, safety-critical vehicle subsystems where PPAP documentation and IATF16949 traceability are mandatory.
Availability
P6SMAJ78ADFQ-13 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input protection, and telecom power supply designs requiring stable component supply, full AEC-Q101 qualification, and guaranteed long-term availability.
Supply support for P6SMAJ78ADFQ-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, manufacturing, and sales operations across Asia, Europe, and North America.
The P6SMAJ series belongs to Diodes' automotive-qualified TVS portfolio, engineered specifically for robust transient suppression in harsh environments-including under-hood, ADAS, and electrified powertrain systems-where AEC-Q101 reliability and IATF16949 process control are essential.
FAQ
What is the maximum operating temperature for P6SMAJ78ADFQ-13?
The device supports continuous operation from –55 °C to +150 °C junction temperature. Its thermal resistance values (RθJT = 57 °C/W on small pad, RθJA = 92 °C/W on standard FR-4) allow direct thermal calculation based on PCB layout and ambient conditions. Derating curves in Figure 6 confirm 1.0 W steady-state dissipation at +25 °C ambient.
Is P6SMAJ78ADFQ-13 bidirectional or unidirectional?
P6SMAJ78ADFQ-13 is a unidirectional TVS diode, configured as a single avalanche junction with cathode and anode terminals. Its schematic symbol and marking (cathode band) confirm polarity-sensitive placement-intended for DC rail protection where reverse voltage is not expected. Bidirectional variants are designated with "CA" suffixes (e.g., P6SMAJ78ACDFQ-13).
Does this part meet ISO 7637-2 Pulse 5a (load dump) requirements?
Yes-P6SMAJ78ADFQ-13 is validated for ISO 7637-2 Pulse 5a (load dump) suppression in 24 V systems when used with appropriate series impedance (e.g., 1 Ω resistor) and proper PCB grounding. Its 600 W rating and 126.0 V clamping voltage align with typical clamp targets for automotive ECUs, as confirmed in Diodes' application note AP02011.
What is the moisture sensitivity level (MSL) for this device?
P6SMAJ78ADFQ-13 has Moisture Sensitivity Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30 °C/60% RH without baking prior to reflow. The D-FLAT package's molded plastic body and matte tin finish contribute to this robust MSL rating, supporting standard SMT assembly without special handling.
P6SMAJ78ADFQ-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):
- 78V
- Voltage - Breakdown (Min):
- 86.7V
- Voltage - Clamping (Max) @ Ipp:
- 126V
- Current - Peak Pulse (10/1000µs):
- 4.7A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D-Flat
P6SMAJ78ADFQ-13 FAQ
1.How can I place an order for P6SMAJ78ADFQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMAJ78ADFQ-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 P6SMAJ78ADFQ-13 reliable?
The price and inventory of P6SMAJ78ADFQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMAJ78ADFQ-13 is usually 5 days.
3.What payment methods are accepted for P6SMAJ78ADFQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMAJ78ADFQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMAJ78ADFQ-13?
P6SMAJ78ADFQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMAJ78ADFQ-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 P6SMAJ78ADFQ-13?
For technical support, including P6SMAJ78ADFQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMAJ78ADFQ-13 requirements.
6.How does Aetrix verify that P6SMAJ78ADFQ-13 is sourced from the original manufacturer or authorized distributors?
All P6SMAJ78ADFQ-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 P6SMAJ78ADFQ-13 meets industry standards.
7.What is the process for return or replacement of P6SMAJ78ADFQ-13?
All P6SMAJ78ADFQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMAJ78ADFQ-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 P6SMAJ78ADFQ-13 part is unused and in its original packaging.
Return procedure for P6SMAJ78ADFQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMAJ78ADFQ-13 Tags
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Diodes Incorporated
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