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Nexperia USA Inc. RB520S30-QX
- Part No.:
- RB520S30-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
RB520S30-QX.pdf
- Description:
- RB520S30-Q/SOD523/SC-79
- Quantity:
- Payment:
- Shipping:
Inventory:5,398
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Product details
Overview
RB520S30-QX from Nexperia is a 200 mA, 30 V Schottky barrier rectifier in SOD523 (SC-79) package, featuring 520–600 mV forward voltage at 200 mA and ≤1 µA reverse leakage at 10 V, designed for low-power automotive and portable electronics rectification and polarity protection.
For engineers reviewing the RB520S30-QX datasheet, RB520S30-QX pinout, RB520S30-QX application, or RB520S30-QX equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance data (Rth(j-a) = 455 K/W on FR4), and real-world use cases in SMPS and reverse polarity circuits.
Technical Context
This planar Schottky diode integrates a guard ring for mechanical and electrical stress protection, enabling stable operation up to 150 °C junction temperature. Its ultra-low VF minimizes conduction loss in high-frequency DC-DC converters where efficiency below 1 W matters.
The device exhibits no minority-carrier storage, delivering near-zero reverse recovery time (trr not specified but inherent to Schottky architecture), making it suitable for switching applications above 1 MHz without commutation loss or ringing concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 200 mA average forward current - supports continuous low-current rectification in space-constrained power rails |
| VR | 30 V reverse voltage - rated for 24 V automotive systems with margin against transients |
| VF @ 200 mA | 520–600 mV - reduces forward power loss to ≤120 mW, critical for battery-powered devices |
| IR @ 10 V | ≤1 µA at 25 °C - ensures minimal standby leakage in always-on circuits |
| Cd @ 1 V | 20 pF - low junction capacitance preserves high-frequency rectifier efficiency in SMPS |
| Rth(j-a) | 455 K/W on FR4 PCB - defines thermal derating curve for ambient temperatures up to 105 °C |
| AEC-Q101 | Qualified - validated for automotive underhood and infotainment applications per stress test standard |
Pinout & Package
Encapsulated in SOD523 (SC-79) ultra-small surface-mount package: 1.2 mm × 0.8 mm × 0.6 mm body, flat lead, single-sided copper FR4 mounting pad (1 cm² cathode pad recommended).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Marked side with bar; connects to output/positive rail in forward-biased rectification |
| 2 | Anode (A) | Unmarked terminal; connects to input/negative rail or ground in reverse polarity protection |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring integration | Enhances ESD robustness and mechanical reliability during board flex or thermal cycling |
| Ultra-low VF profile | Enables >90% efficiency in 3.3 V/5 V buck converters operating at light load |
| SOD523 footprint | Reduces PCB area by 60% vs. SOD323, enabling dense layout in wearables and TWS earbuds |
| AEC-Q101 qualification | Validated for 1000-hr HTOL, temperature cycling, and HAST - meets automotive Grade 2 requirements |
Applications
| Automotive Infotainment Power Rail | USB-C Port Reverse Polarity Protection |
|---|---|
Use Scenario: 12 V to 5 V DC-DC converter input stage in head unit power management. IC Role / Device Role / Timing Role: Low-loss input rectifier preventing backfeed from downstream LDOs during cold-crank events. Use Value: 520 mV VF limits conduction loss to 104 mW at 200 mA, reducing thermal load on compact heatsinkless PCB. |
Use Scenario: Input protection for USB-C PD controller ICs in portable chargers. IC Role / Device Role / Timing Role: Cathode-up series diode blocking reverse current when VBUS is disconnected while CC logic remains powered. Use Value: ≤1 µA IR ensures <1 µW standby drain, preserving battery charge over weeks of idle storage. |
| Low-Power IoT Sensor Node | White LED Biasing in Automotive Interior Lighting |
Use Scenario: Energy harvesting circuit (e.g., solar cell + supercapacitor) rectifying microamp-level charging current. IC Role / Device Role / Timing Role: Unidirectional current gate enabling capacitor charging while blocking discharge through source impedance. Use Value: 250 mV VF at 1 mA allows usable output even at sub-0.5 V input - critical for ultra-low-voltage harvesters. |
Use Scenario: Constant-current bias path for 30 mA white LEDs in door handle illumination modules. IC Role / Device Role / Timing Role: Isolation diode preventing LED string interaction across multiple CAN-controlled lighting zones. Use Value: 20 pF capacitance avoids signal integrity issues on 100 kHz PWM dimming lines, eliminating flicker artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ROHM RB520S30T2R | Same IF(AV)/VR/VF specs; identical SOD523 package; lacks AEC-Q101 documentation in public datasheet | Acceptable for industrial/commercial designs; not certified for automotive production | Select if AEC-Q101 compliance is not required and cost sensitivity outweighs qualification traceability |
| Vishay VSKY2202-H | Higher IF(AV) = 300 mA; VF = 550 mV @ 200 mA; SOD-323 package (1.7 × 1.25 mm) - 40% larger footprint | Better thermal margin in 125 °C ambient; requires PCB redesign due to larger pad layout | Choose when higher surge current capability (IFSM = 1.5 A vs. 1 A) is needed for transient-heavy environments |
Compared with RB520S30-QX, ROHM's variant offers identical performance without automotive qualification, while Vishay's part trades size for higher current headroom and thermal resilience - selection hinges on footprint constraints versus qualification and surge requirements.
Availability
RB520S30-QX is available at Aetrix Electronics and suitable for automotive infotainment systems, USB-C accessory power management, and low-power IoT sensor nodes requiring stable component supply across extended product lifecycles.
Supply support for RB520S30-QX 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
Nexperia is a global semiconductor expert focused on essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and mobile markets.
RB520S30-QX belongs to Nexperia's AEC-Q101-qualified Schottky rectifier family, engineered specifically for space-constrained, thermally sensitive automotive and portable power applications demanding ultra-low VF and proven reliability.
FAQ
Is RB520S30-QX suitable for reflow soldering?
Yes - RB520S30-QX is qualified for lead-free reflow per J-STD-020, with peak temperature tolerance up to 260 °C. The recommended footprint uses 0.4 mm wide solder lands and 0.5 mm spacing per Nexperia's SC-79 layout guide (Fig. 14), ensuring reliable wetting and void-free joints on FR4 boards.
What is the maximum ambient temperature for full 200 mA rating?
At 105 °C ambient, RB520S30-QX delivers its full 200 mA IF(AV) rating only when mounted on FR4 with a 1 cm² cathode pad (per Fig. 9). Without that pad, derating begins above 75 °C ambient - consult Fig. 8 for exact derating curves based on PCB layout.
Does RB520S30-QX have a specified reverse recovery time (trr)?
No - as a Schottky barrier diode, RB520S30-QX has no minority carrier storage, so trr is effectively zero. The datasheet omits trr specification because recovery is limited only by junction capacitance (20 pF) and circuit inductance, not carrier lifetime - confirmed by absence of trr test conditions in Section 11.
Can RB520S30-QX replace RB520S30T2R in an existing design?
Yes - RB520S30-QX and RB520S30T2R share identical electrical specs, SOD523 package dimensions, and marking (ZA), with the sole difference being AEC-Q101 certification. No layout or schematic changes are needed; the QX suffix denotes automotive-qualified traceability and test reporting.
RB520S30-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 600 mV @ 200 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 µA @ 10 V
- Capacitance @ Vr, F:
- 20pF @ 1V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
- Operating Temperature - Junction:
- 150°C
RB520S30-QX FAQ
1.How can I place an order for RB520S30-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for RB520S30-QX 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 RB520S30-QX reliable?
The price and inventory of RB520S30-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RB520S30-QX is usually 5 days.
3.What payment methods are accepted for RB520S30-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RB520S30-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RB520S30-QX?
RB520S30-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RB520S30-QX 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 RB520S30-QX?
For technical support, including RB520S30-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RB520S30-QX requirements.
6.How does Aetrix verify that RB520S30-QX is sourced from the original manufacturer or authorized distributors?
All RB520S30-QX 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 RB520S30-QX meets industry standards.
7.What is the process for return or replacement of RB520S30-QX?
All RB520S30-QX units undergo pre-shipment inspection (PSI). If there is an issue with RB520S30-QX, 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 RB520S30-QX part is unused and in its original packaging.
Return procedure for RB520S30-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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