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Diodes Incorporated P6SMAJ51ADFQ-13
- Part No.:
- P6SMAJ51ADFQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
P6SMAJ51ADFQ-13.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR D-F
- Quantity:
- Payment:
- Shipping:
Inventory:7,302
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Product details
Overview
P6SMAJ51ADFQ-13 from Diodes Incorporated is a 600W surface-mount transient voltage suppressor (TVS) diode in the D-FLAT package, designed for automotive-grade overvoltage protection. It features a 51V reverse standoff voltage, 56.7–65.2V breakdown range at 1mA test current, 82.4V max clamping voltage at 7.3A peak pulse current, and AEC-Q101 qualification for under-hood and powertrain applications.
For engineers reviewing the P6SMAJ51ADFQ-13 datasheet, P6SMAJ51ADFQ-13 pinout, P6SMAJ51ADFQ-13 application, or P6SMAJ51ADFQ-13 equivalent, key selection criteria include clamping voltage margin relative to system rail, peak pulse power handling under ISO 7637-2/ISO 16750-2 transients, thermal resistance on FR-4 PCBs, and AEC-Q101 compliance documentation for automotive PPAP submission.
Technical Context
This unidirectional TVS diode operates as a shunt-clamping device, conducting when reverse voltage exceeds its breakdown threshold to divert surge energy away from sensitive downstream circuitry. Its glass-passivated junction ensures stable VBR and low leakage (<1µA at 51V), while the D-FLAT package enables high-current pulse dissipation with low thermal resistance (RθJT = 57°C/W on 0.4"×0.5" copper pad).
The device responds to 10/1000µs waveform transients per IEC 61000-4-5 and withstands 8.3ms half-sine surges up to 60A. Its 3.5V forward voltage at 35A supports bidirectional surge suppression when paired with a series diode, though it is specified and tested as unidirectional per schematic and marking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - Sustains single 10×1000µs transients without degradation in automotive load-dump or ISO 7637-2 Pulse 5a scenarios. |
| Reverse Standoff Voltage | 51.0V - Maximum continuous DC or RMS voltage applied before significant leakage; sets minimum operating rail margin. |
| Breakdown Voltage Range | 56.7–65.2V @ 1mA - Confirmed conduction onset window; defines clamping initiation point under surge conditions. |
| Max Clamping Voltage | 82.4V @ 7.3A - Upper limit of protected-circuit voltage during worst-case transient; determines required IC overvoltage tolerance. |
| Junction-to-Ambient RθJA | 92°C/W - Measured on 0.4"×0.5", 2oz FR-4 pad; enables thermal design for sustained surge duty in confined engine-control modules. |
| AEC-Q101 Qualified | Yes - Validated for automotive use including temperature cycling, HTRB, and ESD testing; supports PPAP documentation. |
Pinout & Package
Package: D-FLAT (surface-mount, low-profile, 2-terminal plastic case with cathode band polarity indicator; dimensions: 4.65mm × 2.80mm × 1.10mm max height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Surge Current Sink | Connected to protected line (e.g., 48V battery rail); conducts transient current to ground when VREV > VBR. |
| 2 (Anode) | Reference / Ground Return | Typically tied to chassis or power ground; completes current path during clamping; must be low-inductance for effective transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Ensures stable VBR and <1µA leakage at VRWM, critical for low-power always-on automotive modules. |
| D-FLAT low-profile package | Enables placement near connectors or ECUs with height constraints (<1.1mm), while maintaining 600W pulse rating via optimized thermal pad layout. |
| AEC-Q101 qualification & IATF16949 manufacturing | Validates reliability for automotive powertrain and ADAS systems; supports change control, traceability, and PPAP submission requirements. |
| Lead-free, halogen- and antimony-free "Green" construction | Meets RoHS 3 (2015/863/EU) and automotive environmental mandates; <900ppm Br, <900ppm Cl, <1000ppm Sb compounds. |
Applications
| Engine Control Unit (ECU) Power Input | Automotive Camera Module Supply Line |
|---|---|
Use Scenario: Protects 5V/12V/48V input rails in engine management systems against ISO 7637-2 Pulse 5a (load dump) and Pulse 1/2a (inductive switching). IC Role / Device Role: Unidirectional shunt TVS placed between supply rail and ground, clamping transients before they reach LDOs or microcontrollers. Use Value: 82.4V clamping at 7.3A ensures downstream 100V-rated power switches remain within safe operating area during 120V load-dump events. | Use Scenario: Shields MIPI CSI-2 camera power supply (typically 2.8V–5V) from coupled transients on adjacent harnesses in ADAS front-camera assemblies. IC Role / Device Role: Secondary-level TVS on regulated output rail, selected for low capacitance (<50pF at 0V bias) to avoid signal integrity impact on high-speed video lines. Use Value: 51V standoff allows use on higher-voltage intermediate rails feeding local regulators, reducing need for multiple TVS tiers. |
| Body Control Module (BCM) LIN Bus Protection | Electric Power Steering (EPS) Motor Driver Gate Supply |
Use Scenario: Guards LIN transceiver VCC pins against ESD and cable discharge events in door modules and seat controllers. IC Role / Device Role: Low-leakage (≤1µA @ 51V) TVS placed directly at connector entry, minimizing PCB trace inductance before protection element. Use Value: AEC-Q101 qualification ensures immunity to temperature cycling (-55°C to +150°C) and humidity exposure in passenger compartment environments. | Use Scenario: Protects isolated gate driver supply (e.g., 15V bootstrap rail) from Miller-induced spikes and motor phase crosstalk in EPS H-bridge drivers. IC Role / Device Role: High-energy (600W) clamping device mounted near gate driver IC, sinking fast-rising dV/dt transients before they disrupt MOSFET turn-on timing. Use Value: 64°C/W junction-to-terminal thermal resistance enables reliable operation with minimal copper area, fitting tight EPS module layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51A-Q | Same 51V standoff and 600W rating, but in SMA package (higher RθJA = 115°C/W); no AEC-Q101 certification. | Not qualified for automotive PPAP; suitable only for industrial or consumer applications with less stringent reliability requirements. | Select when cost sensitivity outweighs automotive qualification needs and board space permits larger SMA footprint. |
| TPSMD51A | 600W rating, 51V standoff, AEC-Q101 qualified, but in larger SMD-5 package (5.3mm × 6.2mm); RθJA = 75°C/W on standard pad. | Better thermal performance than D-FLAT but occupies ~2.5× more board area; used where surge repetition rate demands lower junction temperature rise. | Select when repeated surge events (e.g., frequent motor commutation) require lower steady-state thermal resistance despite larger footprint. |
Compared with SMAJ51A-Q and TPSMD51A, P6SMAJ51ADFQ-13 uniquely balances AEC-Q101 compliance, ultra-low profile (D-FLAT), and validated 600W pulse capability-making it optimal for space-constrained, safety-critical automotive modules where height and qualification are non-negotiable.
Availability
P6SMAJ51ADFQ-13 is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, body control modules, and electric power steering systems requiring stable component supply with full AEC-Q101 traceability and PPAP support.
Supply support for P6SMAJ51ADFQ-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, specializing in high-reliability components for automotive, industrial, and computing markets with ISO/TS 16949 and IATF16949 certified facilities.
The P6SMAJxxADFQ series belongs to Diodes' automotive-qualified TVS portfolio, engineered specifically to meet stringent ISO 16750-2 and ISO 7637-2 surge immunity requirements in harsh-temperature vehicle environments.
FAQ
What is the maximum clamping voltage of P6SMAJ51ADFQ-13 and under what test condition is it specified?
The maximum clamping voltage is 82.4V, measured at a peak pulse current (IPP) of 7.3A using the standardized 10×1000µs double-exponential waveform per IEC 61000-4-5. This value represents the upper bound of voltage seen by protected circuitry during worst-case transient events and is guaranteed across the full operating temperature range of −55°C to +150°C.
Does P6SMAJ51ADFQ-13 support bidirectional transient suppression?
No, P6SMAJ51ADFQ-13 is a unidirectional TVS diode, as confirmed by its schematic symbol (cathode-anode), marking (MZ code), and electrical characterization in the datasheet. It clamps only reverse-polarity transients on the cathode-connected line. For bidirectional protection, a separate series diode or a dedicated bidirectional TVS such as P6SMBJ51CA must be used.
How does the D-FLAT package of P6SMAJ51ADFQ-13 compare thermally to standard SMA packages?
On a 0.4"×0.5" 2oz FR-4 copper pad, the D-FLAT package achieves RθJA = 92°C/W and RθJT = 57°C/W-significantly better than typical SMA packages (RθJA ≈ 115°C/W). This 20% lower thermal resistance allows higher surge repetition rates or smaller PCB copper areas while maintaining junction temperature below 150°C during 600W pulses.
Is P6SMAJ51ADFQ-13 compatible with lead-free reflow soldering processes?
Yes, it features a matte tin annealed finish over copper lead-frame and is rated for standard Pb-free reflow profiles (JEDEC J-STD-020, Level 1 moisture sensitivity). The device withstands peak temperatures up to 260°C for 30 seconds and is fully compatible with IPC-A-610 Class 2 and Class 3 assembly requirements for automotive electronics.
P6SMAJ51ADFQ-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):
- 51V
- Voltage - Breakdown (Min):
- 56.7V
- Voltage - Clamping (Max) @ Ipp:
- 82.4V
- Current - Peak Pulse (10/1000µs):
- 7.3A
- 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
P6SMAJ51ADFQ-13 FAQ
1.How can I place an order for P6SMAJ51ADFQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMAJ51ADFQ-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 P6SMAJ51ADFQ-13 reliable?
The price and inventory of P6SMAJ51ADFQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMAJ51ADFQ-13 is usually 5 days.
3.What payment methods are accepted for P6SMAJ51ADFQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMAJ51ADFQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMAJ51ADFQ-13?
P6SMAJ51ADFQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMAJ51ADFQ-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 P6SMAJ51ADFQ-13?
For technical support, including P6SMAJ51ADFQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMAJ51ADFQ-13 requirements.
6.How does Aetrix verify that P6SMAJ51ADFQ-13 is sourced from the original manufacturer or authorized distributors?
All P6SMAJ51ADFQ-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 P6SMAJ51ADFQ-13 meets industry standards.
7.What is the process for return or replacement of P6SMAJ51ADFQ-13?
All P6SMAJ51ADFQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMAJ51ADFQ-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 P6SMAJ51ADFQ-13 part is unused and in its original packaging.
Return procedure for P6SMAJ51ADFQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMAJ51ADFQ-13 Tags
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