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Nexperia USA Inc. RB530S40-QX
- Part No.:
- RB530S40-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
RB530S40-QX.pdf
- Description:
- RB530S40-Q/SOD523/SC-79
- Quantity:
- Payment:
- Shipping:
Inventory:8,495
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Product details
Overview
RB530S40-QX from Nexperia is a 40 V, 300 mA planar Schottky barrier diode with integrated guard ring for stress protection, housed in an ultra-small SOD523 (SC-79) surface-mount package. It delivers 320 mV typical forward voltage at 10 mA and 0.5 µA max reverse current at 25 V, enabling high-efficiency clamping and blocking in space-constrained automotive power rails.
For engineers reviewing the RB530S40-QX datasheet, RB530S40-QX pinout, RB530S40-QX application, or RB530S40-QX equivalent, key selection criteria include its AEC-Q101 qualification, low VF/IR trade-off, thermal resistance of 450 K/W on FR4, and compatibility with reflow-soldered ultra-dense PCB layouts.
Technical Context
This Schottky diode uses a planar junction structure with an integrated guard ring to suppress edge breakdown under transient stress-critical for automotive load-dump and ISO 7637-2 pulse immunity. Its low-junction-capacitance (20 pF at 1 V) and fast recovery enable operation beyond 100 MHz in RF bias and clamping circuits.
The device operates across −65 °C to +150 °C junction temperature, with absolute maximum ratings including 40 V reverse voltage, 1 A non-repetitive peak forward current, and 150 °C maximum storage temperature-fully aligned with AEC-Q101 stress test requirements for discrete semiconductors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 40 V - Maximum DC or repetitive peak reverse bias before breakdown; defines safe operating range in 12 V/24 V automotive systems. |
| Forward Voltage (VF) | 320–360 mV @ 10 mA, 25 °C - Enables <100 mW conduction loss at 300 mA average current, reducing thermal load in compact modules. |
| Reverse Current (IR) | ≤0.5 µA @ 25 V, pulsed - Ensures minimal leakage in battery-backup and always-on monitoring circuits over full temperature range. |
| Junction-to-Ambient Rth(j-a) | 450 K/W on FR4, single-sided copper - Limits temperature rise to ~135 °C at 300 mA continuous, supporting derated reliability in sealed enclosures. |
| Diode Capacitance (Cd) | 20 pF @ 1 V, 1 MHz - Supports clean signal integrity in high-speed switching nodes and EMI-sensitive sensor interface clamps. |
| Peak Forward Current (IFSM) | 1 A @ 8.3 ms half-sine - Withstands automotive load-dump transients without degradation when used in input protection stages. |
Pinout & Package
Package: SOD523 (SC-79), 1.2 mm × 0.8 mm × 0.6 mm body, ultra-small flat-lead SMD plastic package with tin-plated terminations. Marking bar indicates cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Negative terminal; connects to lower-potential node in forward conduction; marking bar side on PCB footprint. |
| 2 | Anode (A) | Positive terminal; ties to higher-potential source during forward bias; requires proper thermal relief on high-current traces. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring protection | Suppresses edge avalanche and improves long-term reliability under repetitive surge stress in automotive environments. |
| AEC-Q101 qualification | Validated per stress test standard for discrete semiconductors-enables direct use in ASIL-B compatible power subsystems without additional qualification. |
| Ultra-low VF at low IF | 320 mV typ. @ 10 mA enables efficient biasing of optocouplers, reference diodes, and logic-level gate drivers in standby modes. |
| SOD523 footprint | 0.8 mm width allows placement in <1.0 mm pitch routing zones-ideal for USB-C PD adapters, LED driver IC feedback paths, and PMIC input rails. |
Applications
| Automotive Power Rail Clamping | USB-C Port Protection |
|---|---|
|
Use Scenario: Suppressing ISO 7637-2 pulse 5a (load dump) transients on 12 V battery-fed ECUs. IC Role / Device Role / Timing Role: Fast-clamp diode placed between VBAT and ground rail to shunt surge energy before LDO input. Use Value: 0.5 µA IR ensures no standby drain; 1 A IFSM handles 100 ms surges; guard ring prevents localized failure under repeated stress. |
Use Scenario: Reverse-polarity and overvoltage protection in USB-C receptacle circuits with dual-role power delivery. IC Role / Device Role / Timing Role: Low-capacitance blocking diode in VCONN path and CC line bias networks. Use Value: 20 pF Cd avoids signal integrity degradation on 5 Gbps SuperSpeed lanes; 320 mV VF minimizes voltage drop in 5 V/3 A VBUS switching. |
| Low-Power Sensor Biasing | PMIC Input Decoupling |
|
Use Scenario: Providing stable bias current to MEMS pressure sensors and Hall-effect ICs in engine control modules. IC Role / Device Role / Timing Role: Precision current-source diode in constant-current mirror configurations with op-amp feedback. Use Value: Tight VF tolerance (±20 mV typ.) ensures <2% current error across −40 °C to +125 °C; low IR avoids offset drift in microampere bias paths. |
Use Scenario: Isolating auxiliary LDO inputs from main buck converter output in multi-rail PMICs for ADAS SoCs. IC Role / Device Role / Timing Role: Reverse-blocking diode preventing backfeed during LDO soft-start and fault conditions. Use Value: 450 K/W Rth(j-a) permits 300 mA continuous operation without heatsink; SOD523 size fits within 0.5 mm margin around PMIC QFN pads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky barrier diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSR0340HT1G | Same 40 V VR, but VF = 450 mV typ. @ 10 mA; 1.2 µA IR @ 25 V; SOD-323 package (1.7 mm × 1.3 mm). | Larger footprint increases board area by 140%; higher VF raises conduction loss by ~35% at 300 mA. | Select only if SOD-323 is already standardized in legacy layout and thermal margin >25 °C exists. |
| Vishay VS-3EPH04-M3/84A | 45 V VR, VF = 490 mV @ 10 mA, IR = 1.5 µA @ 25 V; SMA package (4.5 mm × 2.7 mm); rated for 3 A IF. | 10× larger footprint and 3× higher VF limit use to non-space-constrained industrial supplies-not suitable for automotive PCB miniaturization. | Prefer only for high-current (>500 mA), non-automotive applications where surge robustness outweighs size and efficiency. |
Compared with NSR0340HT1G and VS-3EPH04-M3/84A, RB530S40-QX provides the lowest VF/IR balance in the smallest qualified automotive package-making it optimal for next-generation ECU power management where board area, thermal headroom, and AEC compliance are jointly constrained.
Availability
RB530S40-QX is available at Aetrix Electronics and suitable for automotive power rail clamping, USB-C port protection, low-power sensor biasing, and PMIC input decoupling requiring stable component supply with guaranteed AEC-Q101 compliance and extended lifecycle support.
Supply support for RB530S40-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 specializing in high-performance, reliable discrete, logic, and MOSFET devices, with core R&D and manufacturing in Europe and Asia.
RB530S40-QX belongs to Nexperia's AEC-Q101-qualified Schottky diode product line, engineered specifically for automotive power management, ESD-critical interfaces, and space-constrained portable electronics requiring low-loss, low-leakage rectification.
FAQ
Is RB530S40-QX suitable for 48 V mild-hybrid automotive systems?
No. RB530S40-QX has a 40 V maximum reverse voltage rating, making it unsuitable for sustained operation in 48 V nominal systems where transients can exceed 60 V. It is qualified only for 12 V and 24 V automotive architectures per AEC-Q101 test conditions and limiting values.
What is the recommended solder profile for RB530S40-QX?
Nexperia specifies JEDEC J-STD-020-compliant reflow for SOD523 packages: peak temperature 260 °C, time above 217 °C ≤ 60 s, ramp-up rate ≤ 3 °C/s. The device supports lead-free assembly and is compatible with standard FR4 PCBs using the footprint shown in Figure 5 of the datasheet.
Does the guard ring affect electrical parameters like VF or capacitance?
No-the guard ring is a passive structural feature surrounding the active junction to prevent premature edge breakdown. It does not alter forward voltage, reverse current, or junction capacitance values; all published electrical characteristics are measured across the main anode–cathode terminals without guard ring influence.
Can RB530S40-QX replace RB520S30 in existing designs?
No-RB520S30 is rated for 30 V VR and 200 mA IF(AV), while RB530S40-QX is rated for 40 V VR and 300 mA IF(AV). Substitution requires verification of voltage margin, thermal performance, and layout compatibility, as SOD523 footprints are identical but electrical stress limits differ significantly.
RB530S40-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):
- 40 V
- Current - Average Rectified (Io):
- 300mA
- Voltage - Forward (Vf) (Max) @ If:
- 600 mV @ 200 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 nA @ 25 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
RB530S40-QX FAQ
1.How can I place an order for RB530S40-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for RB530S40-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 RB530S40-QX reliable?
The price and inventory of RB530S40-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RB530S40-QX is usually 5 days.
3.What payment methods are accepted for RB530S40-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RB530S40-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RB530S40-QX?
RB530S40-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RB530S40-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 RB530S40-QX?
For technical support, including RB530S40-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RB530S40-QX requirements.
6.How does Aetrix verify that RB530S40-QX is sourced from the original manufacturer or authorized distributors?
All RB530S40-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 RB530S40-QX meets industry standards.
7.What is the process for return or replacement of RB530S40-QX?
All RB530S40-QX units undergo pre-shipment inspection (PSI). If there is an issue with RB530S40-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 RB530S40-QX part is unused and in its original packaging.
Return procedure for RB530S40-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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