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Diodes Incorporated PD3S140Q-7
- Part No.:
- PD3S140Q-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- PowerDI™ 323
- Datasheet:
-
PD3S140Q-7.pdf
- Description:
- DIODE SCHOTT 40V 1A PWRDI323 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,531
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Product details
Overview
PD3S140Q-7 from Diodes Incorporated is a 40 V, 1.0 A surface-mount Schottky barrier rectifier in POWERDI323 package, featuring 0.55 V max forward voltage at 1.0 A and 0.05 mA max reverse leakage at 40 V. It is AEC-Q101 qualified for automotive polarity protection and flyback recirculation circuits.
For engineers reviewing the PD3S140Q-7 datasheet, PD3S140Q-7 pinout, PD3S140Q-7 application, or PD3S140Q-7 equivalent, key selection criteria include low VF for efficiency-critical 12 V automotive rails, high surge capability (22 A IFSM), thermal resistance (130 °C/W on polyimide PCB), and RoHS/halogen-free compliance for Tier-1 supply chain requirements.
Technical Context
This Schottky rectifier uses guard ring die construction to enhance transient immunity and supports continuous operation from −55 °C to +150 °C. Its low junction-to-ambient thermal resistance (130 °C/W on polyimide PCB) enables reliable performance in confined automotive under-hood environments without forced cooling.
The device delivers stable forward conduction down to 0.1 A (VF = 0.37–0.42 V) and maintains sub-50 µA leakage at rated 40 V reverse bias, enabling low-power standby functionality in always-on vehicle modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR (VRRM) | 40 V - Maximum DC blocking voltage; suitable for 12 V automotive systems with load-dump margin. |
| IF(AV) | 1.0 A - Continuous forward current rating; supports typical body control module power rail loads. |
| VF @ 1.0 A | 0.55 V max - Low conduction loss; reduces power dissipation to ≤550 mW at full load. |
| IR @ 40 V | 50 µA max - Minimal leakage in off-state; preserves battery life in sleep-mode ECUs. |
| IFSM | 22 A - Single half-sine surge rating; withstands inductive kickback from solenoids and motors. |
| RθJA | 130 °C/W - Thermal resistance on polyimide PCB; enables 1.0 A operation up to +85 °C ambient. |
| Package | POWERDI323 - Ultra-small 2.5 × 1.9 mm footprint; saves board space vs. SOD-123. |
Pinout & Package
POWERDI323 is a 2-terminal surface-mount package with cathode band marking. Terminals are matte tin–annealed copper; polarity is unambiguous via molded cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry | Connected to input/positive rail; accepts up to 1.0 A DC or 22 A surge. |
| Cathode | Forward current exit / reverse blocking node | Marked by band; ties to load ground or return path; blocks up to 40 V reverse. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive temperature cycling, humidity, and mechanical shock per JESD47. |
| Guard ring die construction | Improves ESD robustness and clamps fast transients without external TVS. |
| Lead-free & halogen-free | Meets EU RoHS 2 and automotive "Green" standards (<900 ppm Br/Cl, <1000 ppm Sb). |
| Moisture sensitivity Level 1 | No bake required before reflow; compatible with standard SMT assembly lines. |
Applications
| Body Control Module (BCM) Polarity Protection | Engine Control Unit (ECU) Recirculation Diode |
|---|---|
Use Scenario: Reverse-battery connection protection on 12 V input rail of BCM power management IC. IC Role / Device Role / Timing Role: Unidirectional current gate; blocks reverse current while passing forward load current. Use Value: Prevents damage to downstream regulators and microcontrollers during service misconnection; operates reliably across −40 °C to +125 °C. | Use Scenario: Freewheeling path for fuel injector coil current decay after PWM turn-off. IC Role / Device Role / Timing Role: Fast-recovery recirculation diode; clamps inductive flyback voltage spike. Use Value: Limits voltage overshoot to ≤40 V, protecting driver MOSFETs; 22 A IFSM handles peak coil energy. |
| ADAS Camera Power Sequencing | Infotainment USB Port Overvoltage Clamp |
Use Scenario: Input rail protection for 5 V camera module powered via FET switch with sequencing delay. IC Role / Device Role / Timing Role: Polarity guard during hot-plug and power-up ramp. Use Value: Sub-0.55 V VF minimizes dropout in low-voltage rail; 50 µA IR ensures minimal quiescent drain during camera sleep mode. | Use Scenario: Reverse-current block between dual-source USB power paths (e.g., car charger + battery pack). IC Role / Device Role / Timing Role: OR-ing diode preventing backfeed between supplies. Use Value: 1.0 A rating supports USB 2.0/3.0 charging loads; POWERDI323 footprint fits tight layout near USB connector. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB140-E3/54 (Vishay) | Same 40 V / 1.0 A rating but in DO-214AA (SMA); VF = 0.55 V @ 1.0 A; RθJA ≈ 180 °C/W. | Larger footprint; less suitable for ultra-dense automotive PCBs. | Preferred where legacy SMA footprint is fixed and thermal margin allows. |
| SS14 (ON Semiconductor) | 40 V / 1.0 A in SMA; VF = 0.5 V @ 1.0 A; not AEC-Q101 qualified; RθJA ≈ 175 °C/W. | Not automotive-qualified; limited to industrial or consumer use. | Select only for non-automotive designs where qualification is not required. |
Compared with SB140-E3/54 and SS14, PD3S140Q-7 offers superior board-area efficiency (POWERDI323 vs. SMA), lower thermal resistance on polyimide PCB (130 vs. ≥175 °C/W), and mandatory AEC-Q101 compliance-making it the sole choice for new automotive designs requiring PPAP traceability and space-constrained layouts.
Availability
PD3S140Q-7 is available at Aetrix Electronics and suitable for automotive body electronics, engine control units, ADAS camera modules, and infotainment power sequencing requiring stable component supply and AEC-Q101 traceability.
Supply support for PD3S140Q-7 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, serving automotive, industrial, computing, and consumer markets with high-reliability components.
The POWERDI® Schottky rectifier product line targets space- and thermally constrained automotive power interfaces, delivering AEC-Q101–qualified performance in ultra-miniature packages for next-generation ECU and ADAS subsystems.
FAQ
What is the maximum operating temperature for PD3S140Q-7?
The PD3S140Q-7 is rated for junction and storage temperatures from −55 °C to +150 °C. Its derating curve (Figure 5) shows usable average forward current drops to ~0.6 A at +100 °C ambient on polyimide PCB, maintaining safe operation within automotive under-hood conditions.
Is PD3S140Q-7 suitable for synchronous rectification?
No-PD3S140Q-7 is a passive Schottky rectifier, not a MOSFET-based synchronous rectifier controller or driver. It lacks gate drive circuitry and cannot replace active synchronous rectifiers in DC-DC converters; it functions solely as a unidirectional conduction device.
Does PD3S140Q-7 require a heatsink in typical automotive applications?
No external heatsink is required. With RθJA = 130 °C/W on polyimide PCB and 0.55 V VF at 1.0 A, power dissipation is ≤550 mW, resulting in ~72 °C junction rise above 85 °C ambient-within the +150 °C absolute max rating. Standard 2 oz. copper pads suffice.
How is polarity identified on the PD3S140Q-7 package?
Polarity is marked by a molded cathode band on the top surface of the POWERDI323 case. The terminal adjacent to the band is the cathode; the opposite terminal is the anode. This matches standard diode marking convention and is visible under 20× magnification or automated optical inspection.
PD3S140Q-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- PowerDI™ 323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 50 µA @ 40 V
- Capacitance @ Vr, F:
- 32pF @ 10V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerDI™ 323
- Operating Temperature - Junction:
- -55°C ~ 150°C
PD3S140Q-7 FAQ
1.How can I place an order for PD3S140Q-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for PD3S140Q-7 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 PD3S140Q-7 reliable?
The price and inventory of PD3S140Q-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PD3S140Q-7 is usually 5 days.
3.What payment methods are accepted for PD3S140Q-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PD3S140Q-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PD3S140Q-7?
PD3S140Q-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PD3S140Q-7 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 PD3S140Q-7?
For technical support, including PD3S140Q-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PD3S140Q-7 requirements.
6.How does Aetrix verify that PD3S140Q-7 is sourced from the original manufacturer or authorized distributors?
All PD3S140Q-7 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 PD3S140Q-7 meets industry standards.
7.What is the process for return or replacement of PD3S140Q-7?
All PD3S140Q-7 units undergo pre-shipment inspection (PSI). If there is an issue with PD3S140Q-7, 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 PD3S140Q-7 part is unused and in its original packaging.
Return procedure for PD3S140Q-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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