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onsemi RS1GFA
- Part No.:
- RS1GFA
- Manufacturer:
- onsemi
- Category:
- Single Diodes
- Package:
- SOD-123W
- Datasheet:
-
RS1GFA.pdf
- Description:
- DIODE GP 400V 800MA SOD123FA
- Quantity:
- Payment:
- Shipping:
Inventory:5,236
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Product details
Overview
RS1GFA from onsemi is a surface-mount fast recovery rectifier diode rated for 400 V repetitive peak reverse voltage, 0.8 A average forward current, and 250 ns reverse recovery time, with 1.3 V maximum forward voltage at 0.8 A - used in AC/DC input stages of compact power supplies and DC-DC converter secondary-side rectification.
For engineers reviewing the RS1GFA datasheet, pinout, applications, or equivalent options, key selection criteria include its SOD-123FA package thermal performance (JL = 32°C/W), AEC-Q101 qualification for automotive-grade reliability, and verified 250 ns Trr under IF = 0.5 A / IR = 1 A / Irr = 0.25 A test conditions.
Technical Context
The RS1GFA operates as a unidirectional silicon PN junction rectifier optimized for high-frequency switching applications up to several hundred kHz. Its fast recovery behavior stems from controlled carrier lifetime reduction, enabling reduced switching losses compared to standard recovery diodes.
It features glass-passivated chip junctions for enhanced moisture resistance and long-term stability, and meets UL 94V-0 flammability requirements with RoHS-compliant green molding compound - supporting industrial and automotive environments where thermal cycling and humidity exposure are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - supports rectification in 28 VAC–300 VAC input circuits with safety margin |
| IF(AV) | 0.8 A - suitable for low-power SMPS outputs up to ~10 W at typical efficiency |
| Trr | 250 ns - enables efficient operation in 100–500 kHz switch-mode topologies |
| VF (max) | 1.3 V @ 0.8 A - limits conduction loss to ≤1.04 W at full load, easing thermal design |
| JL | 32 °C/W - allows ~25°C temperature rise over ambient at 0.8 A with minimal copper pad |
| AEC-Q101 | Qualified - validated for automotive under-hood and infotainment power rails |
Pinout & Package
SOD-123FA package (Case 425AB), 2-terminal surface-mount device with cathode marked by color band; designed for automated placement and reflow soldering on 5 mm × 5 mm Cu pads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Output terminal for rectified DC | Connected to load or filter capacitor; polarity-sensitive - reverse connection causes short-circuit failure |
| 2 (Anode) | Input terminal for AC or pulsating DC | Connected to transformer secondary or switching node; carries full forward current and surge transients |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Prevents moisture-induced leakage degradation and extends field life in humid environments |
| Fast recovery (250 ns) | Reduces reverse recovery charge (Qrr) and associated switching losses in high-frequency converters |
| High surge capacity (30 A, 8.3 ms) | Withstands inrush currents during cold-start or line-voltage transients without failure |
| UL 94V-0 & RoHS green compound | Meets international safety and environmental compliance for end-product certifications |
Applications
| AC/DC Adapter Input Rectification | Automotive Infotainment Power Supply |
|---|---|
Use Scenario: Converting 120/230 VAC mains to DC bus in wall-wart adapters rated ≤10 W. IC Role / Device Role / Timing Role: Primary-side uncontrolled rectifier delivering pulsed DC to bulk capacitor. Use Value: 400 V VRRM provides 2× safety margin over 230 VAC RMS; 250 ns Trr minimizes EMI generation during zero-crossing transitions. | Use Scenario: Secondary-side rectification in 12 V DC-DC modules powering head units and display controllers. IC Role / Device Role / Timing Role: Output rectifier synchronized with flyback or forward converter switching frequency. Use Value: AEC-Q101 qualification ensures reliability across −40°C to +125°C ambient; 32°C/W JL enables stable operation on small PCB areas. |
| Industrial Sensor Node Power Rail | USB-C PD Auxiliary Power Path |
Use Scenario: Providing isolated 5 V/3.3 V bias supply for analog sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Low-current rectifier in miniature flyback or capacitive-dropper-derived auxiliary supply. Use Value: 1.3 V VF maximizes efficiency at light loads; SOD-123FA footprint saves space in dense IoT module layouts. | Use Scenario: Supporting dual-role power path management in USB-C PD sink designs requiring auxiliary 5 V rail. IC Role / Device Role / Timing Role: Standby rectifier for always-on monitoring circuitry during host negotiation. Use Value: MSL 1 rating guarantees no popcorning during reflow; 50 μA IR at 25°C prevents standby current drain in battery-backed systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R04 | TO-220AC package; 400 V VRRM; 1.0 A IF(AV); 35 ns Trr (faster but higher VF ≈ 1.45 V) | Requires heatsink for >0.5 A; unsuitable for ultra-compact layouts | Prefer when lower Trr dominates over size and thermal constraints |
| MBR0540 | Schottky diode; 40 V VRRM; 0.5 A IF(AV); no reverse recovery (Trr = 0 ns); VF ≈ 0.55 V | Not rated for 400 V - limited to low-voltage DC-DC secondaries only | Choose only if system VR < 40 V and ultra-low VF is critical |
Compared with STTH1R04 and MBR0540, the RS1GFA uniquely balances 400 V capability, SOD-123FA compactness, AEC-Q101 qualification, and 250 ns Trr - making it optimal for space-constrained, automotive-qualified, medium-voltage rectification where Schottky limitations or through-hole thermal overhead are unacceptable.
Availability
RS1GFA is available at Aetrix Electronics and suitable for AC/DC adapters, automotive infotainment power supplies, and industrial sensor node bias rails requiring stable component supply, long-lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for RS1GFA 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and intelligent edge applications.
The RS1GFA belongs to the RS1xFA fast recovery rectifier product line, engineered for high-efficiency, high-reliability rectification in compact, thermally constrained power conversion systems operating up to 500 kHz.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) rating for RS1GFA?
The RS1GFA has a VRRM rating of 400 V, confirmed in Table 1 of the official onsemi datasheet (Rev. 4, June 2024). This value defines the highest instantaneous reverse voltage the device can block repeatedly without breakdown, making RS1GFA suitable for rectifying up to 280 VAC RMS inputs with appropriate derating. Exceeding this rating risks irreversible junction avalanche failure.
Is RS1GFA qualified for automotive applications?
Yes, RS1GFA is explicitly qualified to AEC-Q101 standards per the onsemi datasheet, and is marked "NRVHP" prefix eligible for automotive use. It undergoes stress testing for temperature cycling, humidity, and mechanical shock - validating suitability for under-dash infotainment, body control modules, and other non-safety-critical automotive power rails.
What is the reverse recovery time (Trr) of RS1GFA and how is it measured?
The RS1GFA has a reverse recovery time of 250 ns, measured under standardized conditions: IF = 0.5 A, IR = 1 A, and Irr = 0.25 A (per Table 3 and Figure 6). This parameter reflects the time required for minority carriers to clear after forward conduction ceases - directly impacting switching loss and EMI in high-frequency converters using RS1GFA.
Does RS1GFA have a RoHS-compliant package?
Yes, RS1GFA uses a RoHS-compliant green molding compound and meets the EU Directive 2011/65/EU requirements. The datasheet confirms RoHS compliance and UL 94V-0 flammability rating - essential for CE-marked industrial equipment and automotive ECUs requiring full material declaration and hazardous substance restriction.
What is the thermal resistance from junction to lead (JL) for RS1GFA?
The junction-to-lead thermal resistance (JL) of RS1GFA is 32°C/W, specified in Table 2 of the onsemi datasheet. This value assumes mounting on a 5 mm × 5 mm copper pad and enables accurate thermal modeling of temperature rise under steady-state conduction - critical for ensuring TJ remains within −55°C to +150°C operating range during continuous 0.8 A operation.
RS1GFA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123W
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 800mA
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 800 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 250 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 V
- Capacitance @ Vr, F:
- 10pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123FA
- Operating Temperature - Junction:
- -55°C ~ 150°C
RS1GFA FAQ
1.How can I place an order for RS1GFA through Aetrix?
Please submit a Request for Quotation (RFQ) for RS1GFA 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 RS1GFA reliable?
The price and inventory of RS1GFA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS1GFA is usually 5 days.
3.What payment methods are accepted for RS1GFA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS1GFA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS1GFA?
RS1GFA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS1GFA 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 RS1GFA?
For technical support, including RS1GFA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS1GFA requirements.
6.How does Aetrix verify that RS1GFA is sourced from the original manufacturer or authorized distributors?
All RS1GFA 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 RS1GFA meets industry standards.
7.What is the process for return or replacement of RS1GFA?
All RS1GFA units undergo pre-shipment inspection (PSI). If there is an issue with RS1GFA, 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 RS1GFA part is unused and in its original packaging.
Return procedure for RS1GFA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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