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Nexperia USA Inc. RB751CS40,315
- Part No.:
- RB751CS40,315
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SOD-882
- Datasheet:
-
RB751CS40,315.pdf
- Description:
- DIODE SCHOTT 40V 120MA DFN1006-2
- Quantity:
- Payment:
- Shipping:
Inventory:15,746
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Product details
Overview
RB751CS40 from Nexperia is a planar Schottky barrier diode with integrated guard ring for stress protection, housed in a leadless DFN1006-2 (SOD882) package. It delivers 40 V repetitive peak reverse voltage, 370 mV forward voltage at 1 mA, and 2 pF capacitance at 1 V/1 MHz - enabling ultra-high-speed switching and reverse polarity protection in space-constrained automotive and portable electronics.
For engineers reviewing the RB751CS40 datasheet, RB751CS40 pinout, RB751CS40 application, or RB751CS40 equivalent, key selection criteria include its AEC-Q101 qualification, low VF for power efficiency, minimal Cd for high-frequency signal integrity, and thermal resistance of 500 K/W on FR4 PCBs.
Technical Context
This Schottky diode uses a planar silicon structure with an integrated guard ring to enhance ESD and surge robustness without compromising switching speed. Its low forward voltage arises from optimized metal–semiconductor junction design, while the ultra-small DFN1006-2 footprint enables placement in tight board layouts typical of automotive body control modules and USB-C port protection circuits.
The device operates across −65 °C to +150 °C ambient temperature and is qualified per AEC-Q101 for automotive use. Its 0.5 µA reverse leakage at 30 V and 25 °C supports reliable clamping in low-power sensor interfaces and battery-backed systems where standby current must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking voltage; defines safe operating range in line termination and reverse polarity protection. |
| VF | 370 mV @ 1 mA - Low conduction loss at light load; critical for energy harvesting and always-on circuits. |
| Cd | 2 pF @ 1 V, 1 MHz - Enables >100 MHz signal integrity in high-speed data line clamping (e.g., USB 2.0, I²C). |
| IF | 120 mA continuous - Sustains steady-state current in compact DC-DC feedback paths and LED biasing. |
| Rth(j-a) | 500 K/W - Thermal resistance on standard FR4 PCB; determines maximum power dissipation (250 mW) under natural convection. |
| IR | 0.5 µA @ 30 V - Ultra-low leakage preserves battery life in reverse-battery protection for 12 V automotive subsystems. |
Pinout & Package
Package: DFN1006-2 (SOD882), leadless, 1.0 mm × 0.6 mm × 0.48 mm body, 0.65 mm pitch, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to higher-potential node in reverse polarity protection; marking bar identifies this terminal for automated optical inspection. |
| 2 | Anode (A) | Connected to system input or battery positive; forms low-VF path when forward biased during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated guard ring | Improves ruggedness against ESD and transient overstress without increasing forward voltage or capacitance. |
| AEC-Q101 qualification | Validated for automotive applications including body electronics, infotainment power rails, and ADAS sensor interfaces. |
| Ultra-small DFN1006-2 | Reduces PCB area by >70% vs. SOT23; compatible with reflow-only assembly and high-density routing. |
| Low thermal resistance | 500 K/W enables 250 mW dissipation on standard FR4 - sufficient for clamping transients in 5 V/12 V domains. |
Applications
| USB Port Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting USB 2.0 data lines and VBUS from ESD and reverse connection during hot-plug events. IC Role / Device Role / Timing Role: Schottky clamp diode placed between signal line and ground or supply rail to shunt transients. Use Value: 2 pF capacitance preserves signal rise/fall times; 370 mV VF ensures minimal voltage drop during clamping. | Use Scenario: Reverse battery protection for microcontroller power supplies in door modules and seat controllers. IC Role / Device Role / Timing Role: Anode connected to battery input, cathode to MCU VDD; blocks reverse current during incorrect battery installation. Use Value: 0.5 µA leakage at 30 V prevents drain on 12 V battery during vehicle sleep mode. |
| High-Speed Logic Clamping | Low-Power Sensor Interface |
Use Scenario: Clamping overshoot on GPIO lines interfacing with external sensors or actuators in industrial PLCs. IC Role / Device Role / Timing Role: Bidirectional clamp between I/O pin and VCC/GND to limit voltage excursions beyond rail limits. Use Value: 40 V VRRM accommodates 24 V industrial bus transients; fast recovery avoids signal distortion. | Use Scenario: Power path isolation for battery-backed real-time clock (RTC) circuits in wearables and telematics units. IC Role / Device Role / Timing Role: Forward-biased diode in series with RTC supply to prevent backfeed from supercapacitor during main power loss. Use Value: 370 mV VF minimizes voltage drop across diode, preserving RTC operating margin down to 1.8 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RB751V40,315 | Same DFN1006-2 package and 40 V rating, but lacks AEC-Q101 qualification; VF = 390 mV @ 1 mA. | Not approved for automotive use; suitable for consumer-grade USB or IoT sensor nodes. | Select only if AEC-Q101 is not required and 20 mV higher VF is acceptable. |
| NSR0240HT1G | 0402 package (1.0 mm × 0.6 mm), 40 V, VF = 450 mV @ 1 mA, no AEC-Q101 certification. | Higher VF increases power loss in battery-critical designs; smaller footprint may complicate rework. | Prefer when legacy 0402 land pattern is fixed and AEC-Q101 is unnecessary. |
Compared with RB751V40,315 and NSR0240HT1G, the RB751CS40 uniquely combines AEC-Q101 qualification, lowest VF (370 mV), and verified 2 pF capacitance - making it the optimal choice for automotive signal-line protection where reliability and signal fidelity are jointly constrained.
Availability
RB751CS40 is available at Aetrix Electronics and suitable for automotive body electronics, USB-C interface protection, and low-power sensor power management requiring stable component supply and long-term lifecycle support.
Supply support for RB751CS40 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 leadership in automotive-qualified components and advanced packaging.
The RB751CS40 belongs to Nexperia's Schottky diode portfolio designed specifically for space-constrained, high-reliability automotive and portable electronics applications demanding low VF, low Cd, and AEC-Q101 compliance.
FAQ
Is RB751CS40 suitable for reflow soldering only?
Yes. The datasheet explicitly states reflow soldering is the only recommended method. Hand soldering or wave soldering is not supported due to thermal limitations of the DFN1006-2 package and risk of delamination or voiding. Reflow profile must comply with JEDEC J-STD-020 moisture sensitivity level (MSL) requirements.
What does the "F6" marking on the device indicate?
The "F6" marking is the manufacturer-specific code for RB751CS40, as confirmed in Table 4 of the datasheet. It appears adjacent to the cathode bar on the top surface of the DFN1006-2 package and serves as the primary visual identifier for traceability and automated optical inspection during assembly.
How does the guard ring improve reliability?
The integrated guard ring mitigates edge breakdown under high electric field stress, increasing the device's ability to withstand ESD (per IEC 61000-4-2) and repetitive voltage transients without degradation. This is validated through AEC-Q101 stress testing, including human-body model (HBM) ESD up to ±8 kV.
Can RB751CS40 replace a standard silicon diode in reverse polarity protection?
Yes - with significant advantages. Its 370 mV forward voltage reduces power loss by ~65% versus a typical 1N400x silicon diode (~1.1 V VF), improving efficiency and thermal performance. However, its 40 V VRRM and 120 mA IF limit use to low-voltage, low-current applications such as 5 V/12 V subsystems.
RB751CS40,315 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SOD-882
- 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:
- DFN1006-2
- Operating Temperature - Junction:
- 150°C (Max)
RB751CS40,315 FAQ
1.How can I place an order for RB751CS40,315 through Aetrix?
Please submit a Request for Quotation (RFQ) for RB751CS40,315 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 RB751CS40,315 reliable?
The price and inventory of RB751CS40,315 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RB751CS40,315 is usually 5 days.
3.What payment methods are accepted for RB751CS40,315?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RB751CS40,315 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RB751CS40,315?
RB751CS40,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RB751CS40,315 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 RB751CS40,315?
For technical support, including RB751CS40,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RB751CS40,315 requirements.
6.How does Aetrix verify that RB751CS40,315 is sourced from the original manufacturer or authorized distributors?
All RB751CS40,315 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 RB751CS40,315 meets industry standards.
7.What is the process for return or replacement of RB751CS40,315?
All RB751CS40,315 units undergo pre-shipment inspection (PSI). If there is an issue with RB751CS40,315, 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 RB751CS40,315 part is unused and in its original packaging.
Return procedure for RB751CS40,315:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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