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Diodes Incorporated PD3S120LQ-7
- Part No.:
- PD3S120LQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- PowerDI™ 323
- Datasheet:
-
PD3S120LQ-7.pdf
- Description:
- DIODE SCHOTTKY 20V 1A PWRDI323
- Quantity:
- Payment:
- Shipping:
Inventory:9,580
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Product details
Overview
PD3S120LQ-7 from Diodes Incorporated is a 20 V, 1.0 A surface-mount Schottky barrier rectifier in PowerDI®323 package, optimized for automotive polarity protection and flyback recirculation. It delivers ultra-low forward voltage (0.36 V at 1.0 A, +25°C), low leakage (30 µA at 20 V, +25°C), and AEC-Q101 qualification for under-hood reliability.
For engineers reviewing the PD3S120LQ-7 datasheet, PD3S120LQ-7 pinout, PD3S120LQ-7 application, or PD3S120LQ-7 equivalent, key selection criteria include its 33 A non-repetitive surge rating, 6 °C/W junction-to-solder thermal resistance, and compatibility with FR-4 and polyimide PCB layouts per AP02001.
Technical Context
This Schottky rectifier uses guard ring die construction to enhance transient immunity and withstand repetitive voltage spikes common in automotive 12 V systems. Its low VF enables high-efficiency DC/DC conversion and reduces conduction losses in reverse-polarity protection circuits.
Designed for operation from –65°C to +125°C, it maintains stable leakage current up to 160 µA at 20 V and +125°C, and exhibits 46 pF capacitance at 10 V reverse bias - critical for minimizing switching noise in high-frequency recirculation paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR (V) | 20 V - Maximum DC blocking voltage; suitable for 12 V automotive systems with load dump margin. |
| IF(AV) (A) | 1.0 A - Continuous average forward current; supports compact layout without forced air cooling. |
| VF MAX (V) | 0.42 V @ 1.0 A, +25°C - Low conduction loss improves power efficiency in battery-fed circuits. |
| IR MAX (µA) | 30 µA @ 20 V, +25°C - Low leakage preserves standby power in always-on vehicle modules. |
| RθJS (°C/W) | 6 °C/W - Enables direct thermal coupling to PCB copper, simplifying thermal design on 2 oz. FR-4. |
| IFS M (A) | 33 A - Withstands single half-sine surge events like ISO 7637-2 pulse 5a without failure. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronics including temperature cycling and HTRB. |
Pinout & Package
Package: PowerDI®323 - ultra-small surface-mount plastic case (2.50 × 1.90 × 0.13 mm), UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry | Connected to input supply rail in polarity protection; requires low-inductance trace routing. |
| Cathode | Forward current exit / reverse voltage terminal | Marked by cathode band; ties to load ground or switching node in recirculation applications. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves ESD and transient robustness without external TVS, reducing BOM count in automotive ECUs. |
| AEC-Q101 qualification | Validated for automotive under-hood environments including temperature cycling, HTGB, and HTRB testing. |
| Lead-free & halogen-free | Meets RoHS 2 and "Green" standards (<900 ppm Br/Cl, <1000 ppm Sb); compatible with lead-free reflow profiles. |
| PowerDI®323 footprint | 0.006 g mass and 2.5 mm × 1.9 mm area enable space-constrained placement near connectors or MCUs. |
Applications
| Automotive Polarity Protection | DC/DC Converter Recirculation |
|---|---|
Use Scenario: Reverse-battery connection protection in body control modules and infotainment head units. IC Role / Device Role / Timing Role: Unidirectional current gate placed between battery input and downstream regulator. Use Value: Prevents damage from –14 V reverse transients while maintaining <0.42 V drop at full load current. | Use Scenario: Freewheeling path for inductive loads in buck converter output stages. IC Role / Device Role / Timing Role: Fast-recovery recirculation diode across synchronous MOSFET's body diode. Use Value: Reduces switching loss and EMI via 46 pF capacitance and sub-30 ns reverse recovery time. |
| Engine Control Unit (ECU) Input Clamping | Telematics Module Power Sequencing |
Use Scenario: Clamp transient overvoltage on sensor supply lines during ignition events. IC Role / Device Role / Timing Role: Standby-mode reverse-blocking element in 5 V/3.3 V LDO input stage. Use Value: Limits leakage to ≤30 µA at 20 V, preserving microamp-level sleep current budgets. | Use Scenario: Isolation diode enabling independent power-up sequencing of cellular and GNSS subsystems. IC Role / Device Role / Timing Role: OR-ing diode in dual-rail power management architecture. Use Value: Enables <0.36 V forward drop at 1.0 A, minimizing voltage droop during simultaneous subsystem wake-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB120-TB | Same 20 V/1.0 A rating but TO-277 package; RθJA = 125 °C/W (vs. 144–170 °C/W for PD3S120LQ-7). | Larger footprint; less suitable for ultra-dense automotive PCBs. | Select when higher thermal mass is needed for intermittent surge duty. |
| SS12-A | 1.0 A/20 V Schottky in SMA package; VF = 0.5 V @ 1.0 A - 140 mV higher than PD3S120LQ-7. | Higher conduction loss; not AEC-Q101 qualified. | Acceptable only for non-automotive industrial use where qualification is not required. |
Compared with SB120-TB and SS12-A, PD3S120LQ-7 uniquely combines AEC-Q101 compliance, PowerDI®323 miniaturization, and lowest VF in its class - making it optimal for space- and efficiency-critical automotive power rails.
Availability
PD3S120LQ-7 is available at Aetrix Electronics and suitable for automotive body electronics, engine control units, and telematics modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for PD3S120LQ-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, specializing in high-reliability power management and signal integrity solutions for automotive, industrial, and consumer markets.
The PowerDI®323 Schottky rectifier product line targets space-constrained, thermally demanding automotive applications where low VF, AEC-Q101 qualification, and ultra-small footprint are mandatory.
FAQ
What is the maximum operating temperature for PD3S120LQ-7?
The PD3S120LQ-7 is rated for junction and storage temperatures from –65°C to +125°C. Its thermal resistance (RθJS = 6 °C/W) allows reliable operation at full 1.0 A current on standard 2 oz. FR-4 PCBs with recommended pad layout per AP02001, even at ambient temperatures up to +105°C.
Is PD3S120LQ-7 suitable for reverse polarity protection in 24 V truck systems?
No - PD3S120LQ-7 has a 20 V VR rating and is designed for 12 V automotive systems. For 24 V applications, Diodes Incorporated offers the PD3S240LQ-7 (24 V, 1.0 A) or PD3S300LQ-7 (30 V, 1.0 A), both in the same PowerDI®323 package and AEC-Q101 qualified.
Does PD3S120LQ-7 require a heatsink for 1.0 A continuous operation?
No heatsink is required. With RθJS = 6 °C/W and RθJA = 144–170 °C/W depending on PCB material, the device dissipates ≤0.42 W at 1.0 A and remains within safe junction limits on standard 2 oz. copper layouts per AP02001 - verified by Figure 5 derating curves in DS36831.
How does the guard ring construction improve reliability?
The guard ring die structure suppresses edge breakdown under high dv/dt and transient voltage conditions, increasing ruggedness against ISO 7637-2 pulses and ESD events. This eliminates need for external clamping components in AEC-Q101-compliant designs, improving system-level MTBF in engine bay and chassis-mounted modules.
PD3S120LQ-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):
- 20 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 420 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 160 µA @ 20 V
- Capacitance @ Vr, F:
- 46pF @ 10V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerDI™ 323
- Operating Temperature - Junction:
- -65°C ~ 125°C
PD3S120LQ-7 FAQ
1.How can I place an order for PD3S120LQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for PD3S120LQ-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 PD3S120LQ-7 reliable?
The price and inventory of PD3S120LQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PD3S120LQ-7 is usually 5 days.
3.What payment methods are accepted for PD3S120LQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PD3S120LQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PD3S120LQ-7?
PD3S120LQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PD3S120LQ-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 PD3S120LQ-7?
For technical support, including PD3S120LQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PD3S120LQ-7 requirements.
6.How does Aetrix verify that PD3S120LQ-7 is sourced from the original manufacturer or authorized distributors?
All PD3S120LQ-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 PD3S120LQ-7 meets industry standards.
7.What is the process for return or replacement of PD3S120LQ-7?
All PD3S120LQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with PD3S120LQ-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 PD3S120LQ-7 part is unused and in its original packaging.
Return procedure for PD3S120LQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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