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Diodes Incorporated RS3A-13
- Part No.:
- RS3A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
RS3A-13.pdf
- Description:
- DIODE GEN PURP 50V 3A SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,110
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Product details
Overview
RS3A-13 from Diodes Incorporated is a 50 V, 3.0 A surface-mount fast recovery rectifier in SMB package, featuring 1.3 V forward voltage at 3.0 A, 150 ns reverse recovery time, and 100 A non-repetitive surge capability - used in AC/DC input stages of compact power supplies and DC-DC converter front-ends.
For engineers reviewing the RS3A-13 datasheet, RS3A-13 pinout, RS3A-13 application, or RS3A-13 equivalent, key selection criteria include peak repetitive reverse voltage (50 V), average rectified current (3.0 A @ TT = 75°C), thermal resistance (25 K/W), fast recovery performance (150 ns), and SMB package compatibility with automated SMT assembly.
Technical Context
This device is a single-phase, silicon planar, glass-passivated fast recovery rectifier optimized for high-efficiency switching power conversion. Its 150 ns recovery time and low 1.3 V forward drop reduce conduction and switching losses in 50–100 kHz flyback and boost topologies.
The SMB package provides 25 K/W junction-to-terminal thermal resistance when mounted on a 5.0 mm² copper pad, enabling reliable operation up to +150°C junction temperature under continuous 3.0 A load with appropriate PCB heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum peak repetitive reverse voltage; defines safe blocking capability in AC line rectification. |
| IO | 3.0 A @ TT = 75°C - Continuous average forward current rating; requires thermal management above ambient. |
| VFM | 1.3 V @ IF = 3.0 A - Forward voltage drop directly impacts conduction loss and thermal rise in high-current paths. |
| trr | 150 ns - Reverse recovery time; critical for minimizing switching loss and EMI in SMPS diode commutation. |
| IFSM | 100 A - Non-repetitive surge rating; supports inrush current handling during cold-start or fault conditions. |
| RJT | 25 K/W - Junction-to-terminal thermal resistance; determines temperature rise per watt dissipated at the solder joint. |
| IRM | 5.0 µA @ 25°C - Peak reverse leakage at rated DC blocking voltage; affects standby power in offline converters. |
Pinout & Package
SMB (DO-214AA) surface-mount package: cathode marked by band; anode and cathode terminals only; no internal gate or control pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point | Connected to AC source or transformer secondary; must withstand full surge and RMS current. |
| Cathode | Output current exit point | Feeds bulk capacitor or downstream regulator; polarity marking ensures correct orientation in layout. |
Key Features
| Feature | Design Value |
|---|---|
| Fast recovery time | 150 ns - Enables efficient operation in 50–200 kHz SMPS without excessive switching loss or ringing. |
| Glass passivated die | Enhanced moisture and contamination resistance - improves long-term reliability in humid or industrial environments. |
| UL 94V-0 plastic case | Self-extinguishing housing - meets safety requirements for enclosed power supply designs. |
| Solderable terminals | Compliant with MIL-STD-202, Method 208 - ensures robust reflow and wave solder joint integrity. |
Applications
| AC/DC Adapter Input Stage | USB-C PD Power Supply Output Rectification |
|---|---|
Use Scenario: Full-wave bridge rectification of 90–264 VAC input in compact wall adapters. IC Role / Device Role / Timing Role: Primary-side unidirectional current switch converting AC to pulsating DC before bulk capacitance. Use Value: 150 ns trr minimizes reverse recovery charge loss, improving efficiency over standard rectifiers by ~0.5% at 100 kHz. | Use Scenario: Secondary-side synchronous rectification replacement in 20–65 W USB-C PD chargers. IC Role / Device Role / Timing Role: High-speed freewheeling diode in active-clamp flyback or LLC resonant output stage. Use Value: Low 1.3 V VFM reduces conduction loss at 3 A load, lowering thermal stress on PCB copper area. |
| Industrial DC-DC Converter Front-End | LED Driver Bulk Rectification |
Use Scenario: Input rectification for 24 V or 48 V isolated DC-DC modules in factory automation equipment. IC Role / Device Role / Timing Role: Fast-recovery diode in discrete bridge configuration feeding regulated DC bus. Use Value: 100 A IFSM withstands motor drive or solenoid turn-off transients without failure. | Use Scenario: Off-line LED driver rectifying 120/230 VAC before constant-current regulation. IC Role / Device Role / Timing Role: High-reliability mains-input rectifier operating continuously at elevated ambient temperatures. Use Value: -65°C to +150°C operating range supports outdoor or enclosed luminaires with minimal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L06S | 600 V VRRM, 3.0 A IO, 75 ns trr, SMA package | Higher voltage rating but slower thermal response due to SMA's higher RJT | Select when >100 V blocking required; verify PCB pad thermal design for same current density. |
| MBR340F | 40 V VRRM, 3.0 A IO, Schottky structure, 0.52 V VFM, 115°C max Tj | Lower forward loss but limited to ≤40 V systems; no reverse recovery charge | Prefer in low-voltage, high-efficiency DC-DC outputs where 50 V margin is sufficient. |
Compared with STTH3L06S and MBR340F, RS3A-13 offers optimal balance of 50 V blocking, 150 ns speed, SMB thermal performance, and cost for universal-input AC/DC front-ends - neither over-specified nor thermally constrained.
Availability
RS3A-13 is available at Aetrix Electronics and suitable for AC/DC adapters, USB-C PD power supplies, and industrial DC-DC converters requiring stable component supply and consistent SMB footprint compatibility.
Supply support for RS3A-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power, signal, and protection devices for industrial, computing, and consumer markets.
The RS3x series belongs to Diodes' fast recovery rectifier product line, designed specifically for high-frequency, high-efficiency AC/DC and DC/DC power conversion where low trr and controlled VFM are critical.
FAQ
What is the maximum allowable junction temperature for RS3A-13?
The absolute maximum junction temperature is +150°C, and the device is rated for continuous operation at this temperature when thermal design limits junction-to-terminal temperature rise to within specification. Derating begins above +75°C terminal temperature per Figure 1 in the datasheet, requiring PCB copper area or airflow to maintain safe operation at full 3.0 A load.
Can RS3A-13 be used in place of a standard PN junction rectifier like 1N4007?
No - RS3A-13 is a fast recovery rectifier with 150 ns trr, while the 1N4007 has >2 µs recovery time. Substituting it into 50/60 Hz linear supplies offers no benefit and risks overstress due to higher leakage and lower surge margin. It is intended only for switching frequencies ≥20 kHz where fast recovery reduces loss and EMI.
Is RS3A-13 lead-free and RoHS compliant?
Yes - RS3A-13 is manufactured using lead-free terminations and complies with EU RoHS Directive 2011/65/EU and JEDEC JS-001 standards. The SMB package uses matte tin plating over copper alloy leads, qualified for standard Pb-free reflow profiles (J-STD-020).
Does RS3A-13 require a heatsink in typical applications?
Not as a discrete heatsink - its 25 K/W junction-to-terminal thermal resistance is managed via PCB copper pad (5.0 mm², 0.013 mm thick). At 3.0 A and 1.3 V drop, power dissipation is ~3.9 W; proper copper area and airflow keep junction temperature within limit without external heatsinks in most adapter and charger designs.
RS3A-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AB, SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 150 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 50 V
- Capacitance @ Vr, F:
- 50pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
- Operating Temperature - Junction:
- -65°C ~ 150°C
RS3A-13 FAQ
1.How can I place an order for RS3A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for RS3A-13 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 RS3A-13 reliable?
The price and inventory of RS3A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS3A-13 is usually 5 days.
3.What payment methods are accepted for RS3A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS3A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS3A-13?
RS3A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS3A-13 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 RS3A-13?
For technical support, including RS3A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS3A-13 requirements.
6.How does Aetrix verify that RS3A-13 is sourced from the original manufacturer or authorized distributors?
All RS3A-13 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 RS3A-13 meets industry standards.
7.What is the process for return or replacement of RS3A-13?
All RS3A-13 units undergo pre-shipment inspection (PSI). If there is an issue with RS3A-13, 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 RS3A-13 part is unused and in its original packaging.
Return procedure for RS3A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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