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Taiwan Semiconductor Corporation RB751M5-40 RSG
- Part No.:
- RB751M5-40 RSG
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
RB751M5-40 RSG.pdf
- Description:
- 0.03A, 40V, SCHOTTKY RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:7,780
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Product details
Overview
RB751M5-40 from Taiwan Semiconductor is a single-die Schottky barrier diode in SOD-523F package, rated for 30 mA forward current and 40 V repetitive peak reverse voltage, with low 0.37 V forward voltage at 1 mA and only 0.5 µA reverse leakage at 30 V - used in compact DC-DC converter output rectification and portable adapter power stages.
For engineers reviewing the RB751M5-40 datasheet, RB751M5-40 pinout, RB751M5-40 application, or RB751M5-40 equivalent, key selection criteria include ultra-low VF for efficiency in low-current bias rails, minimal junction capacitance (2 pF) for high-frequency switching integrity, and SOD-523F footprint compatibility with space-constrained USB-C PD and IoT power modules.
Technical Context
This Schottky diode operates as a unidirectional low-loss rectifier with no minority-carrier storage delay, enabling fast turn-off in discontinuous conduction mode (DCM) flyback and buck converters. Its 125°C maximum junction temperature and -55°C to +125°C operating range support industrial ambient environments.
The device uses a planar silicon die with matte tin-plated terminals compliant with J-STD-002 solderability and JESD201 Class 1A whisker resistance. Polarity is marked by a cathode band on the SOD-523F molded case, and moisture sensitivity is rated Level 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF (Max) | 30 mA - supports bias supply and auxiliary rail rectification without thermal derating in small-signal power paths |
| VRRM | 40 V - suitable for 24 V system input clamping and 3.3/5/12 V output rectification in isolated DC-DC stages |
| VF @ 1 mA | 0.37 V - reduces conduction loss by >40% vs. standard silicon diodes in low-current startup and standby circuits |
| IR @ 30 V | 0.5 µA - ensures negligible leakage in high-impedance feedback networks and battery-backed hold-up circuits |
| C @ 1 V, 1 MHz | 2 pF - minimizes switching node ringing and EMI in >1 MHz synchronous rectifier gate-drive snubbing |
| TJ Range | -55°C to +125°C - enables deployment in automotive cabin electronics and industrial PLC I/O modules |
| Package | SOD-523F - 1.2 × 0.8 × 0.6 mm outline fits 0402-class PCB footprints with 0.3 mm pitch anode-cathode spacing |
Pinout & Package
SOD-523F is a two-terminal surface-mount package with cathode indicated by a band; terminals are matte tin-plated for lead-free reflow compatibility. Weight is 1.60 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point under forward bias | Connected to lower-potential node (e.g., switch node in buck sync rectifier or transformer secondary center-tap) |
| Cathode | Current exit point under forward bias; polarity mark location | Connected to higher-potential output rail; band alignment critical for automated optical inspection (AOI) and pick-and-place accuracy |
Key Features
| Feature | Design Value |
|---|---|
| Low VF (0.37 V @ 1 mA) | Enables >95% efficiency in sub-100 mW auxiliary supplies without active regulation |
| Ultra-low IR (0.5 µA @ 30 V) | Prevents drift in precision voltage reference dividers and low-power sensor bias networks |
| SOD-523F footprint | Reduces board area by 60% vs. SOD-323 while maintaining J-STD-020 Level 1 moisture robustness |
| Halogen-free & RoHS compliant | Meets IPC-1752A material declaration requirements for EU medical and industrial end-equipment |
| Junction temp max = 125°C | Supports operation inside sealed enclosures with 50°C ambient rise without thermal shutdown in fanless designs |
Applications
| USB-C Power Delivery Adapter | Industrial Sensor Node Bias Supply |
|---|---|
Use Scenario: Secondary-side rectification in 5–20 W flyback adapters with QR control. IC Role / Device Role / Timing Role: Low-VF Schottky rectifier replacing synchronous MOSFET gate drive complexity in cost-sensitive designs. Use Value: Eliminates gate driver IC and bootstrap circuitry while maintaining <100 mV dropout at 10 mA load. | Use Scenario: Reverse-polarity protection and rail decoupling in battery-powered wireless sensor nodes. IC Role / Device Role / Timing Role: Unidirectional current path with near-zero forward drop to preserve microamp-level sleep current. Use Value: Adds <0.5 µA leakage overhead versus open-circuit, preserving >10-year coin-cell lifetime. |
| LED Driver Constant-Current Sink | Isolated Feedback Path Clamp |
Use Scenario: Cathode-connected current sink in linear LED drivers for indicator lighting. IC Role / Device Role / Timing Role: Precision current steering element with stable VF over temperature. Use Value: Maintains ±2% LED current variation across -40°C to +85°C ambient due to low VF TC. | Use Scenario: Overvoltage clamp on optocoupler feedback input in isolated AC-DC controllers. IC Role / Device Role / Timing Role: Fast-recovery shunt limiter protecting TL431 reference input. Use Value: Responds within 1 ns to transients >30 V, preventing false triggering of primary-side PWM controller. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSR0330HT1G | Same SOD-523F package; VF = 0.45 V @ 1 mA (0.08 V higher); IR = 0.2 µA @ 30 V (0.3 µA lower) | Better leakage performance but higher conduction loss - preferred in battery-retention circuits over efficiency-critical rails | Select NSR0330HT1G when reverse leakage dominates system quiescent current budget |
| BAT54C,215 | SOD-323 package (larger); VF = 0.33 V @ 1 mA (0.04 V lower); IR = 1.0 µA @ 30 V (0.5 µA higher) | Higher leakage limits use in long-duration sleep modes; larger footprint eases hand-soldering but increases layout area | Select BAT54C,215 when manual rework or thermal margin >200 mW is required |
Compared with NSR0330HT1G and BAT54C,215, the RB751M5-40 delivers optimal balance of low VF, ultra-low IR, and minimal SOD-523F footprint - making it ideal for space- and efficiency-constrained 5–20 W adapter and IoT power management designs where both conduction loss and leakage must be simultaneously minimized.
Availability
RB751M5-40 is available at Aetrix Electronics and suitable for USB-C PD adapters, industrial sensor nodes, and LED indicator drivers requiring stable component supply and full traceability from wafer lot to shipment.
Supply support for RB751M5-40 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global power management and signal conditioning markets since 1979.
The RB751M5-40 belongs to TSC's low-leakage Schottky diode family, engineered specifically for high-efficiency, miniaturized DC-DC power conversion in consumer and industrial edge devices.
FAQ
What is the maximum continuous forward current rating for RB751M5-40?
The RB751M5-40 is rated for a maximum continuous forward current (IF) of 30 mA at TA = 25°C. Derating is required above 25°C ambient, with power dissipation limited to 200 mW and junction temperature capped at +125°C. At 85°C ambient, the usable IF drops to approximately 22 mA based on the published power derating curve.
Does RB751M5-40 have a specified reverse recovery time (trr)?
No - the RB751M5-40 is a Schottky barrier diode and does not exhibit minority-carrier storage; therefore, trr is not defined or specified. Its switching behavior is governed solely by junction capacitance (2 pF) and series resistance, enabling near-instantaneous turn-off essential for high-frequency (>1 MHz) switching applications.
Is RB751M5-40 compatible with lead-free reflow soldering profiles?
Yes - the RB751M5-40 features matte tin-plated terminals qualified per J-STD-002 for solderability and is rated Moisture Sensitivity Level 1 (MSL-1) per J-STD-020, allowing unlimited floor life and compatibility with standard Pb-free reflow profiles up to 260°C peak temperature.
What marking code appears on the RB751M5-40 device body?
The RB751M5-40 is laser-marked with "5" on the top surface of the SOD-523F package, indicating the specific variant within the RB751Mx-40 series. This marking aligns with Taiwan Semiconductor's internal ordering and traceability system and is visible under 20× magnification.
Can RB751M5-40 be used in reverse-biased voltage clamp configurations?
Yes - with a VRRM of 40 V and VR rating of 30 V, the RB751M5-40 functions reliably as a low-leakage clamp in feedback paths and protection circuits. At VR = 30 V, its reverse current remains ≤0.5 µA, ensuring minimal loading on high-impedance nodes such as TL431 reference inputs or op-amp comparators.
RB751M5-40 RSG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- 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):
- 30mA
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523F
- Operating Temperature - Junction:
- -55°C ~ 125°C
RB751M5-40 RSG FAQ
1.How can I place an order for RB751M5-40 RSG through Aetrix?
Please submit a Request for Quotation (RFQ) for RB751M5-40 RSG 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 RB751M5-40 RSG reliable?
The price and inventory of RB751M5-40 RSG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RB751M5-40 RSG is usually 5 days.
3.What payment methods are accepted for RB751M5-40 RSG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RB751M5-40 RSG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RB751M5-40 RSG?
RB751M5-40 RSG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RB751M5-40 RSG 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 RB751M5-40 RSG?
For technical support, including RB751M5-40 RSG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RB751M5-40 RSG requirements.
6.How does Aetrix verify that RB751M5-40 RSG is sourced from the original manufacturer or authorized distributors?
All RB751M5-40 RSG 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 RB751M5-40 RSG meets industry standards.
7.What is the process for return or replacement of RB751M5-40 RSG?
All RB751M5-40 RSG units undergo pre-shipment inspection (PSI). If there is an issue with RB751M5-40 RSG, 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 RB751M5-40 RSG part is unused and in its original packaging.
Return procedure for RB751M5-40 RSG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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