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Nexperia USA Inc. RB751S40,115
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- Part No.:
- RB751S40,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
RB751S40,115.pdf
- Description:
- DIODE SCHOTTKY 40V 120MA SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:109,039
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Product details
Overview
RB751S40,115 from Nexperia is a planar Schottky barrier diode with integrated guard ring for stress protection, housed in an ultra-small SOD523 (SC-79) surface-mount package. It delivers 40 V repetitive peak reverse voltage, 370 mV forward voltage at 1 mA, 0.5 µA reverse current at 30 V, 2 pF capacitance at 1 V/1 MHz, and 120 mA forward current - enabling compact, high-speed clamping and polarity protection in space-constrained portable electronics.
For engineers reviewing the RB751S40,115 datasheet, RB751S40,115 pinout, RB751S40,115 application, or RB751S40,115 equivalent, key selection criteria include low VF for efficiency-sensitive bias networks, sub-2 pF junction capacitance for RF line termination, thermal resistance of 450 K/W on FR4, and cathode-marked SOD523 footprint compatibility with automated reflow assembly.
Technical Context
This Schottky diode uses a planar silicon structure with an integrated guard ring to enhance ruggedness against transient overvoltage and ESD stress without compromising switching speed. Its low-barrier metal-semiconductor junction enables fast recovery (no minority carrier storage) and stable performance across −40 °C to +125 °C ambient.
The device operates exclusively in forward conduction and reverse blocking modes - no gate control, no bidirectional conduction, and no regulated output. Its electrical behavior is defined by VF vs. IF curves, IR vs. VR characteristics, and Cd vs. VR dependency, all verified under pulsed test conditions per IEC 60134.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage before breakdown; sets clamping ceiling in polarity protection and line termination. |
| VF | 370 mV @ 1 mA - Low forward drop minimizes power loss in signal-level biasing and low-current rectification paths. |
| IR | 0.5 µA @ 30 V - Ultra-low leakage preserves signal integrity in high-impedance sensing and battery-backed circuits. |
| Cd | 2 pF @ 1 V, 1 MHz - Enables clean high-frequency termination up to ~1 GHz without resonant peaking. |
| IF | 120 mA DC - Continuous forward current rating suitable for USB port protection and logic-level clamp applications. |
| Rth(j-a) | 450 K/W - Thermal resistance on standard FR4 PCB defines derating curve above 25 °C ambient. |
Pinout & Package
RB751S40,115 is supplied in the SOD523 (SC-79) plastic surface-mount package: 1.2 mm × 0.8 mm × 0.6 mm body, flat lead, single-row two-terminal configuration. The cathode is marked by a visible bar on the package top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to lower-potential node in forward bias; marking bar identifies this terminal for orientation during placement. |
| 2 | Anode (A) | Connected to higher-potential node in forward bias; current flows from Pin 2 to Pin 1 when forward-biased. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring integration | Enhances ESD robustness (IEC 61000-4-2 Level 4) and transient voltage immunity without increasing VF or Cd. |
| Ultra-low forward voltage | 370 mV at 1 mA enables efficient biasing in 1.8 V–3.3 V logic interface circuits with minimal headroom loss. |
| Sub-2 pF junction capacitance | 2 pF at 1 V allows use in >500 MHz signal path termination without degrading edge fidelity or causing reflections. |
| SOD523 footprint | 1.2 mm × 0.8 mm outline supports high-density layout in wearables, TWS earbuds, and miniaturized IoT sensors. |
Applications
| USB Port Polarity Protection | High-Speed Logic Line Termination |
|---|---|
Use Scenario: Preventing damage from reversed USB cable insertion in portable chargers and peripheral hubs. IC Role / Device Role / Timing Role: Unidirectional series-blocking diode placed between VBUS and downstream load. Use Value: 40 V VRRM withstands hot-swap transients; 370 mV VF limits voltage drop below USB 2.0 specification thresholds. |
Use Scenario: Matching impedance on differential clock or data lines in FPGA-to-ASIC interconnects. IC Role / Device Role / Timing Role: Passive shunt termination element absorbing high-frequency reflections. Use Value: 2 pF Cd ensures minimal capacitive loading at 100+ MHz; low IR avoids DC offset in AC-coupled paths. |
| Reverse Battery Protection | Low-Power Signal Clamping |
Use Scenario: Blocking reverse current flow in coin-cell–powered medical sensors and BLE beacons. IC Role / Device Role / Timing Role: Series-connected anode-to-battery cathode, blocking reverse conduction. Use Value: 0.5 µA IR at 3 V preserves multi-year shelf life; 120 mA IF supports peak sensor burst currents. |
Use Scenario: Limiting analog input voltage excursions in ADC front-ends of industrial condition monitors. IC Role / Device Role / Timing Role: Clamp diode tied between signal line and reference rail (e.g., AVDD or GND). Use Value: Fast Schottky response (<1 ns) prevents latch-up; low VF sets precise ±370 mV clipping threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSR0230HT1G | VF = 450 mV @ 1 mA; Cd = 3.5 pF @ 1 V; same SOD-523 package. | Higher capacitance limits use above 300 MHz; higher VF increases power loss in low-voltage bias rails. | Select when cost sensitivity outweighs RF performance or when margin exists in forward voltage budget. |
| Vishay SD103AWS-TP | VRRM = 40 V; VF = 430 mV @ 10 mA; Cd = 10 pF @ 0 V; SOD-323 package (1.7 mm × 1.3 mm). | Larger footprint reduces board density; 10 pF capacitance degrades >100 MHz signal integrity. | Choose only if legacy SOD-323 layout reuse is required and RF bandwidth is not critical. |
Compared with NSR0230HT1G and SD103AWS-TP, RB751S40,115 offers the lowest combined VF/Cd trade-off in SOD523, making it optimal for high-density, high-frequency, and ultra-low-power applications where both signal fidelity and efficiency are constrained.
Availability
RB751S40,115 is available at Aetrix Electronics and suitable for USB port protection, high-speed logic termination, reverse battery protection, and low-power signal clamping requiring stable component supply and consistent SOD523 packaging.
Supply support for RB751S40,115 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 high-volume, high-reliability discrete and logic devices, with core expertise in Schottky diodes, MOSFETs, and ESD protection components.
RB751S40,115 belongs to Nexperia's general-purpose Schottky diode product line, engineered specifically for miniaturized consumer and portable electronics demanding low VF, low Cd, and robust transient handling in sub-1 mm² footprints.
FAQ
What is the maximum junction temperature for RB751S40,115?
The absolute maximum junction temperature is 150 °C, as specified in the limiting values table. Operation above this temperature risks permanent degradation of the Schottky barrier. Derating begins at 25 °C ambient based on Rth(j-a) = 450 K/W, requiring thermal design consideration for continuous 120 mA loads.
Is RB751S40,115 suitable for automotive applications?
No - RB751S40,115 is not AEC-Q200 qualified and lacks automotive-grade screening, temperature cycling validation, or extended reliability testing. Nexperia explicitly states non-automotive qualification in its legal disclaimers, and the device is intended for commercial and industrial portable electronics only.
How is polarity identified on the RB751S40,115 package?
Polarity is indicated by a laser-marked bar on the top surface of the SOD523 package, aligned with Pin 1 (cathode). This matches the pinning diagram in the datasheet and is visible under 10× magnification or automated optical inspection systems during SMT placement.
Can RB751S40,115 replace a standard silicon diode in a 3.3 V logic clamp?
Yes - its 370 mV forward voltage provides tighter clamping than a typical silicon diode (~700 mV), reducing overshoot risk and improving noise margin. However, its 40 V VRRM and 0.5 µA IR must be verified against the specific transient amplitude and leakage tolerance of the target circuit.
RB751S40,115 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):
- 120mA
- Voltage - Forward (Vf) (Max) @ If:
- 370 mV @ 1 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 nA @ 30 V
- Capacitance @ Vr, F:
- 2pF @ 1V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
- Operating Temperature - Junction:
- 150°C (Max)
RB751S40,115 FAQ
1.How can I place an order for RB751S40,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for RB751S40,115 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 RB751S40,115 reliable?
The price and inventory of RB751S40,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RB751S40,115 is usually 5 days.
3.What payment methods are accepted for RB751S40,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RB751S40,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RB751S40,115?
RB751S40,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RB751S40,115 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 RB751S40,115?
For technical support, including RB751S40,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RB751S40,115 requirements.
6.How does Aetrix verify that RB751S40,115 is sourced from the original manufacturer or authorized distributors?
All RB751S40,115 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 RB751S40,115 meets industry standards.
7.What is the process for return or replacement of RB751S40,115?
All RB751S40,115 units undergo pre-shipment inspection (PSI). If there is an issue with RB751S40,115, 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 RB751S40,115 part is unused and in its original packaging.
Return procedure for RB751S40,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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