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Diodes Incorporated RS1A-13
- Part No.:
- RS1A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
RS1A-13.pdf
- Description:
- DIODE GEN PURP 50V 1A SMA
- Quantity:
- Payment:
- Shipping:
Inventory:8,050
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Product details
Overview
RS1A-13 from Diodes Incorporated is a 1.0A surface-mount fast recovery rectifier diode in SMA package, rated for 50V peak repetitive reverse voltage (VRRM), 1.3V forward voltage drop at 1.0A, and 150ns reverse recovery time - optimized for high-efficiency AC/DC front-end rectification in compact power supplies and LED drivers.
For engineers reviewing the RS1A-13 datasheet, RS1A-13 pinout, RS1A-13 application, or RS1A-13 equivalent, key selection criteria include its fast recovery performance under 60Hz half-wave resistive load, low thermal resistance (20°C/W), RoHS-compliant lead-free finish, and suitability for automated SMT assembly with JEDEC-standard tape-and-reel packaging (5000/reel).
Technical Context
This device is a single-junction, glass-passivated silicon PN junction rectifier designed for unidirectional current conduction in switching power supplies and DC bias circuits. Its fast recovery (trr = 150ns) minimizes switching losses during turn-off, while the 30A non-repetitive surge rating supports transient line-event robustness.
The SMA package enables compact board layout with low thermal resistance (RJT = 20°C/W) and compatibility with standard reflow profiles. Polarity is marked by a cathode band, and the device operates across –65°C to +150°C junction temperature range without derating up to 120°C terminal temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse voltage before breakdown; defines safe operating limit in bridge or half-wave rectifier configurations. |
| IO @ TT=120°C | 1.0 A - Continuous average forward current at 120°C terminal temperature; sets thermal design margin for PCB copper area and airflow. |
| VFM @ IF=1.0A | 1.3 V - Forward voltage drop at rated DC current; directly impacts conduction loss (1.3W dissipation at 1.0A). |
| trr | 150 ns - Reverse recovery time measured at IF=0.5A, IR=1.0A, Irr=0.25A; critical for EMI control and efficiency in 20–100kHz SMPS designs. |
| IFSM | 30 A - Non-repetitive surge current rating (8.3ms half-sine); supports inrush current handling in offline input stages. |
| RJT | 20 °C/W - Junction-to-terminal thermal resistance; determines temperature rise above PCB pad under steady-state power dissipation. |
| CT | 15 pF - Typical junction capacitance at 4V reverse bias and 1MHz; influences high-frequency noise coupling and snubber design. |
Pinout & Package
SMA package: molded plastic case (UL 94V-0), cathode band polarity marking, solderable matte tin terminals, 0.064g weight. Dimensions: A=2.29–2.92mm, B=4.00–4.60mm, C=1.27–1.63mm, D=0.15–0.31mm, E=4.80–5.59mm, G=0.10–0.20mm, H=0.76–1.52mm, J=2.01–2.30mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to AC input or transformer secondary; must withstand full surge current and thermal cycling. |
| Cathode | Forward current exit / reverse blocking node | Marked by band; ties to output capacitor or ground return; reverse leakage (5µA @ 25°C) affects standby power. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die construction | Enhances humidity resistance and long-term reliability in industrial environments without hermetic sealing. |
| Fast recovery time (150ns) | Reduces switching loss and EMI generation compared to standard rectifiers (e.g., 1N4007: ~2µs), enabling higher-frequency operation. |
| Low forward voltage (1.3V @ 1A) | Lowers conduction loss by ~15% vs. comparable 1A Schottky diodes with VF ≥1.5V, improving thermal budget in sealed enclosures. |
| RoHS-compliant lead-free finish | Meets EU Directive Annex exemptions for high-temp soldering; compatible with Pb-free reflow profiles (peak 260°C). |
| JEDEC-standard tape-and-reel (5000/reel) | Enables direct integration into high-speed pick-and-place lines without manual handling or packaging conversion. |
Applications
| AC/DC Adapter Input Stage | LED Driver Bridge Rectifier |
|---|---|
Use Scenario: Single-phase 50/60Hz rectification feeding 12V/24V isolated flyback converter in wall-plug adapters. IC Role / Device Role / Timing Role: Primary-side unidirectional current switch; conducts only during positive half-cycles with minimal reverse recovery tail. Use Value: 150ns trr limits switching node ringing and reduces snubber losses, supporting >85% efficiency at 10W output. | Use Scenario: Full-wave bridge rectification of 120VAC mains for constant-current LED driver IC input. IC Role / Device Role / Timing Role: High-reliability rectifying element in discrete bridge configuration; handles 30A surge during cold-start inrush. Use Value: 30A IFSM rating prevents failure during capacitor charging transients, extending field life beyond 50,000 hours. |
| Industrial Sensor Power Supply | USB-C PD Auxiliary Rail Rectifier |
Use Scenario: Low-power 5V auxiliary rail derived from 24VAC control wiring in PLC I/O modules. IC Role / Device Role / Timing Role: Half-wave rectifier feeding linear regulator; operates continuously at 85°C ambient with no forced airflow. Use Value: 20°C/W RJT allows stable operation at 1.0A IO with ≤20°C junction rise over pad, avoiding thermal shutdown. | Use Scenario: Secondary-side rectification in compact USB-C PD 20W adapter (5V/3A + 9V/2.22A). IC Role / Device Role / Timing Role: Fast-recovery replacement for slower general-purpose diodes in synchronous rectifier assist paths. Use Value: 1.3V VF at 1A reduces conduction loss by 0.2W vs. RS1J-13 (1.7V), lowering thermal stress on small-area PCB pads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RS1AB-13 | SMB package (larger footprint, 0.093g), same electrical specs (50V/1.0A/150ns), higher thermal mass. | Better suited for higher ambient temperatures (>85°C) or higher vibration environments due to mechanical robustness. | Select RS1AB-13 when board space permits and thermal margin is prioritized over miniaturization. |
| 1N4933-T | Same SMA package, but 100V VRRM, 1.2V VF @ 1A, 200ns trr, and 25A IFSM per ON Semiconductor datasheet. | Higher voltage rating enables use in 100VAC-input designs; slightly slower recovery increases EMI risk in high-frequency layouts. | Choose 1N4933-T only if 100V blocking is required; otherwise RS1A-13 offers superior trr/VF trade-off at 50V. |
Compared with RS1AB-13 and 1N4933-T, RS1A-13 delivers the optimal balance of speed (150ns), conduction loss (1.3V), and compact SMA form factor for cost-sensitive 50V-class AC/DC inputs where board area and EMI are constrained.
Availability
RS1A-13 is available at Aetrix Electronics and suitable for AC/DC adapters, LED lighting drivers, industrial sensor power supplies, and USB-C PD auxiliary rails requiring stable component supply, consistent tape-and-reel delivery, and RoHS-compliant manufacturing.
Supply support for RS1A-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, headquartered in Plano, Texas, with design centers across Asia and Europe, serving industrial, computing, consumer, and communications markets.
The RS1x series targets cost-effective, high-reliability rectification in space-constrained power conversion systems, emphasizing fast recovery, low VF, and automated assembly readiness across SMA/SMB footprints.
FAQ
What is the maximum junction temperature for RS1A-13?
The absolute maximum junction temperature is +150°C, with continuous operation permitted up to +120°C terminal temperature (TT). Derating begins above 120°C per Figure 1 in DS15002 Rev. 9, where average forward current drops linearly to zero at 150°C junction.
Is RS1A-13 suitable for use in a full-wave bridge configuration?
Yes - RS1A-13 is commonly used in discrete full-wave bridge rectifiers (e.g., four devices in KBP202 footprint adaptation). Its 30A IFSM rating and 50V VRRM support standard 120VAC input bridges when paired with appropriate heatsinking and surge protection.
Does RS1A-13 have a lead-free finish?
Yes - RS1A-13 is supplied with a matte tin lead-free plating compliant with RoHS Directive 2011/65/EU (Annex exemptions applied), qualified per J-STD-020C moisture sensitivity level 1, and compatible with Pb-free reflow profiles up to 260°C peak.
How does RS1A-13 compare to standard recovery diodes like 1N4001?
RS1A-13 offers 150ns reverse recovery time versus ~2µs for 1N4001, reducing switching losses and EMI in >20kHz applications. It also features lower VF (1.3V vs. ~1.1V at 1A but with much higher trr penalty), tighter parameter distribution, and optimized SMT packaging for modern assembly lines.
RS1A-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 150 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 50 V
- Capacitance @ Vr, F:
- 15pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
- Operating Temperature - Junction:
- -65°C ~ 150°C
RS1A-13 FAQ
1.How can I place an order for RS1A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for RS1A-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 RS1A-13 reliable?
The price and inventory of RS1A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS1A-13 is usually 5 days.
3.What payment methods are accepted for RS1A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS1A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS1A-13?
RS1A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS1A-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 RS1A-13?
For technical support, including RS1A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS1A-13 requirements.
6.How does Aetrix verify that RS1A-13 is sourced from the original manufacturer or authorized distributors?
All RS1A-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 RS1A-13 meets industry standards.
7.What is the process for return or replacement of RS1A-13?
All RS1A-13 units undergo pre-shipment inspection (PSI). If there is an issue with RS1A-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 RS1A-13 part is unused and in its original packaging.
Return procedure for RS1A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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