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Nexperia USA Inc. RB751V45X
- Part No.:
- RB751V45X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
RB751V45X.pdf
- Description:
- RB751V45/SOD323/SOD2
- Quantity:
- Payment:
- Shipping:
Inventory:7,129
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Product details
Overview
RB751V45X from Nexperia is a general-purpose Schottky diode in SOD323 (SC-76) package, designed for ultra-high-speed switching and voltage clamping. It delivers 45 V repetitive peak reverse voltage (VRRM), 380 mV forward voltage at 1 mA, 120 mA forward current rating, and 5 pF capacitance at 0 V - enabling low-loss signal path protection in space-constrained portable and power management circuits.
For engineers reviewing the RB751V45X datasheet, RB751V45X pinout, RB751V45X application, or RB751V45X equivalent, key selection criteria include its low VF at microamp-level bias, sub-10 µA IR at 40 V reverse stress, thermal resistance of 450 K/W on FR4, and cathode-marked SOD323 footprint compatibility with high-density PCB layouts.
Technical Context
This Schottky diode leverages a metal–semiconductor junction to achieve fast recovery (no minority carrier storage) and low forward conduction loss. Its 45 V VRRM rating supports use in 3.3 V–24 V rail clamping and flyback snubbing where transient suppression must occur within nanoseconds.
The device operates across –65 °C to +150 °C junction temperature range, with 1 µA typical reverse leakage at 30 V and 10 µA at 40 V (Tamb = 25 °C), making it suitable for battery-powered systems requiring minimal standby current drain.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - enables clamping of transients up to 45 V peak without breakdown |
| VF @ 1 mA | 380 mV - ensures minimal voltage drop in low-current bias and sensing paths |
| IF max | 120 mA - supports continuous operation in signal-level rectification and logic-level clamping |
| IR @ 40 V | 10 µA - limits leakage-induced battery drain in always-on circuits |
| Cd @ 0 V | 5 pF - preserves signal integrity in >100 MHz digital or RF interface protection |
| Rth(j-a) | 450 K/W - defines thermal rise under 120 mA DC load on standard FR4 PCB |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package: 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, cathode indicated by marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to lower-potential node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to higher-potential node; forward current flows from Pin 2 to Pin 1 |
Key Features
| Feature | Design Value |
|---|---|
| High switching speed | No reverse recovery time (trr ≈ 0 ns) due to majority-carrier conduction - eliminates switching spikes in PWM feedback paths |
| Low leakage current | 1 µA at 30 V reverse bias - maintains accuracy in high-impedance voltage monitor inputs |
| Low capacitance | 5 pF at 0 V - minimizes loading on high-frequency clock or data lines during ESD clamp operation |
| High breakdown voltage | 45 V VRRM - provides margin above 36 V automotive or industrial supply rails for robust transient tolerance |
Applications
| USB Data Line Protection | DC-DC Converter Feedback Clamp |
|---|---|
Use Scenario: Protecting USB 2.0 D+ and D− lines against ESD and IEC 61000-4-2 transients. IC Role / Device Role / Timing Role: Low-capacitance Schottky clamp between data line and VBUS or ground. Use Value: 5 pF capacitance avoids signal edge degradation; 380 mV VF ensures clamping threshold stays below USB receiver's absolute maximum rating. | Use Scenario: Clamping feedback node of isolated flyback or buck-boost converters to prevent regulation error during output overvoltage events. IC Role / Device Role / Timing Role: Fast-acting voltage limiter on optocoupler input or error amplifier reference path. Use Value: 45 V VRRM accommodates 36 V nominal output rails with safety margin; zero trr prevents delay-induced instability. |
| Low-Power Microcontroller Reset Circuit | Li-ion Battery Voltage Monitor Input |
Use Scenario: Providing clean, low-leakage pull-up for manual reset button connected to MCU reset pin. IC Role / Device Role / Timing Role: Reverse-biased diode isolating reset line from noisy system rails during deep-sleep modes. Use Value: 1 µA IR at 30 V ensures <10 nA leakage into reset pin - avoids false wakeups in sub-µA sleep states. | Use Scenario: Dividing and clamping battery voltage before ADC input in fuel gauge or protection IC monitoring circuits. IC Role / Device Role / Timing Role: Front-end protection diode limiting input to safe range while adding negligible offset. Use Value: 380 mV VF introduces predictable, stable offset (<0.4 V) that can be calibrated out; 120 mA IF rating exceeds surge currents from capacitor discharge. |
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 | VRRM = 30 V; VF = 450 mV @ 1 mA; Cd = 10 pF | Limited to ≤24 V systems; higher capacitance reduces bandwidth in RF paths | Select when cost sensitivity outweighs 15 V VRRM margin and 5 pF advantage |
| Diodes Incorporated B5819WS | VRRM = 40 V; VF = 600 mV @ 1 mA; IF = 1 A | Higher VF increases power loss in low-current bias networks; larger SOD323 variant may not fit same footprint | Prefer for higher-current clamping where 600 mV VF is acceptable and board space allows |
Compared with NSR0230HT1G and B5819WS, RB751V45X uniquely balances 45 V standoff, sub-400 mV VF at microamp bias, and 5 pF capacitance in the smallest SOD323 outline - making it optimal for precision, space-limited, low-leakage signal-path protection.
Availability
RB751V45X is available at Aetrix Electronics and suitable for USB interface protection, DC-DC converter feedback clamping, and Li-ion battery voltage monitoring requiring stable component supply and consistent SOD323 footprint compliance.
Supply support for RB751V45X 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, serving automotive, industrial, and consumer markets with scalable manufacturing and rigorous quality control.
RB751V45X belongs to Nexperia's general-purpose Schottky diode product line, engineered for reliable, low-VF, low-Cd performance in compact SMD packages where speed, leakage, and layout density are critical.
FAQ
What is the maximum continuous forward current for RB751V45X?
The RB751V45X is rated for 120 mA continuous forward current (IF) under normal operating conditions. This rating assumes ambient temperature ≤70 °C and proper PCB thermal relief; derating applies above 70 °C per the thermal resistance curve in the datasheet.
Does RB751V45X have a specified reverse recovery time (trr)?
No - RB751V45X is a Schottky diode with majority-carrier conduction, so it has no defined reverse recovery time. Its switching is effectively instantaneous (trr ≈ 0 ns), eliminating switching losses and ringing in high-frequency clamping applications.
Can RB751V45X be used in automotive applications?
RB751V45X is not AEC-Q200 qualified and is not recommended for automotive safety-critical or mission-critical systems. It may be used in non-safety automotive subsystems (e.g., infotainment power rails) only after full system-level validation and with awareness of its non-automotive qualification status.
How is the cathode identified on the RB751V45X package?
The cathode is marked by a visible bar on the top surface of the SOD323 package, aligned with Pin 1. The device outline shows Pin 1 as the cathode (K) and Pin 2 as the anode (A); this matches the silkscreen polarity indicator on standard PCB footprints.
RB751V45X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- 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:
- 1 V @ 40 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 40 V
- Capacitance @ Vr, F:
- 5pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
- Operating Temperature - Junction:
- 150°C
RB751V45X FAQ
1.How can I place an order for RB751V45X through Aetrix?
Please submit a Request for Quotation (RFQ) for RB751V45X 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 RB751V45X reliable?
The price and inventory of RB751V45X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RB751V45X is usually 5 days.
3.What payment methods are accepted for RB751V45X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RB751V45X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RB751V45X?
RB751V45X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RB751V45X 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 RB751V45X?
For technical support, including RB751V45X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RB751V45X requirements.
6.How does Aetrix verify that RB751V45X is sourced from the original manufacturer or authorized distributors?
All RB751V45X 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 RB751V45X meets industry standards.
7.What is the process for return or replacement of RB751V45X?
All RB751V45X units undergo pre-shipment inspection (PSI). If there is an issue with RB751V45X, 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 RB751V45X part is unused and in its original packaging.
Return procedure for RB751V45X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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