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Taiwan Semiconductor Corporation RS2GAF-T
- Part No.:
- RS2GAF-T
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
RS2GAF-T.pdf
- Description:
- 150NS, 2A, 400V, FAST RECOVERY R
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
RS2GAF-T from Taiwan Semiconductor is a 2 A, 400 V fast recovery surface-mount rectifier diode in SMAF package, featuring 150 ns reverse recovery time, 0.93 V forward voltage at 2 A/25°C, and 50 A surge current capability; used in switching mode power supplies and DC-DC converters.
For engineers reviewing the RS2GAF-T datasheet, RS2GAF-T pinout, RS2GAF-T application, or RS2GAF-T equivalent, key selection criteria include peak reverse voltage (400 V), thermal resistance (RθJL = 15 °C/W), junction temperature range (–55 to +150 °C), and low leakage (<5 µA at 25°C).
Technical Context
This single-die, glass-passivated fast recovery rectifier operates with low forward voltage drop and tightly controlled reverse recovery characteristics. Its 150 ns trr and 21 pF junction capacitance at 1 MHz / 4 V support high-frequency switching up to several hundred kHz in SMPS topologies.
The device uses matte tin-plated leads compliant with J-STD-002, meets JESD201 Class 1 whisker resistance, and is rated for moisture sensitivity level 1 per J-STD-020 - enabling standard reflow assembly without baking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - maximum repetitive reverse blocking voltage; defines safe operating limit in flyback or boost output stages |
| IF | 2 A continuous - average forward current rating at TA = 75°C on 5 mm × 5 mm Cu pad |
| trr | 150 ns - measured at IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A; enables efficient operation in 100–500 kHz converters |
| VF @ 2 A, 25°C | 0.93 V - forward conduction loss directly impacts efficiency and thermal design of secondary-side rectification |
| RθJL | 15 °C/W - junction-to-lead thermal resistance; supports direct PCB heat sinking via cathode lead |
| IR @ VR, 25°C | <5 µA - low reverse leakage preserves standby power budget in energy-sensitive applications |
Pinout & Package
Package: SMAF - surface-mount, molded plastic case with gull-wing leads, UL 94V-0 rated, polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry | Connected to transformer secondary or switch node; requires adequate copper area for thermal dissipation |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; serves as primary thermal path to PCB; soldered to large copper pour for RθJL optimization |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances reliability under humidity and thermal cycling; eliminates need for conformal coating in industrial environments |
| Moisture sensitivity level 1 | Enables direct placement and reflow without dry-pack or baking - reduces manufacturing overhead |
| J-STD-002 solderable leads | Guarantees consistent wetting and joint integrity across lead-free reflow profiles (e.g., IPC/JEDEC J-STD-020) |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU; supports green product compliance reporting |
Applications
| DC-DC Converter Secondary Rectification | Switching Mode Inverter Output Stage |
|---|---|
Use Scenario: High-efficiency isolated DC-DC converter delivering 12 V @ 1.5 A from 48 V input using flyback topology. IC Role / Device Role / Timing Role: Fast recovery rectifier conducting during transformer reset phase; replaces slower general-purpose diodes to reduce switching losses. Use Value: 150 ns trr and 0.93 V VF lower conduction and recovery losses versus 1N5822, improving full-load efficiency by ~1.2%. | Use Scenario: 400 V DC bus feeding half-bridge inverter driving PMSM motor in HVAC blower system. IC Role / Device Role / Timing Role: Freewheeling diode clamping inductive kickback during PWM dead-time intervals. Use Value: 400 V VRRM and 50 A IFSM ensure robust operation during transient overcurrent events without avalanche stress. |
| Industrial AC-DC Adapter | LED Driver Output Rectification |
Use Scenario: Universal-input (90–264 VAC) offline adapter powering PLC I/O modules with 24 V/1 A output. IC Role / Device Role / Timing Role: Output rectifier in discontinuous conduction mode (DCM) flyback; handles 2 A average load with 100% duty cycle at low line. Use Value: RθJL = 15 °C/W allows thermal management using only PCB copper - no heatsink required at ambient ≤50°C. | Use Scenario: Constant-current LED driver for street lighting, converting 300 VDC bus to regulated 350 mA for 12-series LED string. IC Role / Device Role / Timing Role: Output rectifier in active-clamp forward converter; conducts during main switch off-time. Use Value: Low 5 µA reverse leakage at 25°C prevents capacitor discharge drift, maintaining tight current regulation over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2R04S | VRRM = 400 V, IF = 2 A, trr = 35 ns, VF = 1.15 V @ 2 A - faster but higher forward drop | Better suited for >1 MHz resonant converters where trr dominates loss; less optimal for cost-sensitive 100–300 kHz designs | Select STTH2R04S when trr-driven EMI or efficiency above 92% is critical; RS2GAF-T preferred for BOM cost and thermal margin |
| MBR240 | VRRM = 40 V, IF = 2 A, Schottky - zero recovery charge but limited to low-voltage outputs | Only viable for ≤48 V output rails; unsuitable for 400 V bus or flyback secondary with reflected voltage >100 V | Choose MBR240 only for low-VOUT DC-DC; RS2GAF-T remains necessary for 400 V blocking requirement |
Compared with STTH2R04S and MBR240, RS2GAF-T delivers balanced performance for 400 V-class SMPS: lower VF than STTH2R04S improves conduction loss, while its VRRM rating enables use where MBR240 fails - making it the default choice for mid-voltage industrial power conversion.
Availability
RS2GAF-T is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and industrial AC-DC adapters requiring stable component supply and long-term production continuity.
Supply support for RS2GAF-T 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 industrial, computing, and consumer markets since 1979.
The RS2x series was designed specifically for high-reliability, cost-optimized switching power supplies - emphasizing thermal robustness, assembly compatibility, and consistent parametric distribution across voltage grades.
FAQ
What is the maximum junction temperature rating for RS2GAF-T?
The RS2GAF-T has a maximum junction temperature (TJ) of +150°C and a minimum of –55°C. This rating is validated under steady-state conditions with proper PCB thermal design - specifically using a 5 mm × 5 mm copper pad per the JEDEC test board definition. Operation beyond this range risks permanent degradation of the glass-passivated junction.
Is RS2GAF-T compatible with lead-free reflow soldering processes?
Yes, RS2GAF-T is fully compatible with lead-free reflow soldering. Its matte tin-plated leads meet J-STD-002 requirements for solderability, and the SMAF package is qualified for peak temperatures up to 260°C per J-STD-020. The device is rated moisture sensitivity level 1, eliminating pre-bake requirements before assembly.
What does the marking code 'RS2GAF' indicate on the RS2GAF-T device body?
The marking code 'RS2GAF' on the RS2GAF-T identifies it as the 400 V variant within the RS2x family. 'RS' denotes rectifier series, '2' indicates 2 A rating, 'G' specifies 400 V VRRM, and 'AF' refers to SMAF package and green molding compound - consistent with Taiwan Semiconductor's standardized ordering nomenclature.
How does RS2GAF-T compare to RS2DAF-T in terms of electrical performance?
RS2GAF-T and RS2DAF-T share identical package, thermal specs, and forward characteristics (VF, IF, trr), differing only in peak reverse voltage: RS2DAF-T is rated for 200 V, while RS2GAF-T is rated for 400 V. Both exhibit 150 ns trr and 0.93 V VF @ 2 A/25°C, making them functionally interchangeable where voltage margin permits.
Can RS2GAF-T be used in place of a Schottky diode like MBR240?
No - RS2GAF-T cannot replace MBR240 in most applications due to fundamental differences: MBR240 is a 40 V Schottky diode with near-zero reverse recovery, while RS2GAF-T is a 400 V fast recovery PN diode with 150 ns trr. Substitution would cause catastrophic failure in circuits requiring ≥400 V blocking or induce excessive switching loss where Schottky speed is essential.
RS2GAF-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-221AC, SMA Flat Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 150 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 V
- Capacitance @ Vr, F:
- 21pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMAF
- Operating Temperature - Junction:
- -55°C ~ 150°C
RS2GAF-T FAQ
1.How can I place an order for RS2GAF-T through Aetrix?
Please submit a Request for Quotation (RFQ) for RS2GAF-T 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 RS2GAF-T reliable?
The price and inventory of RS2GAF-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS2GAF-T is usually 5 days.
3.What payment methods are accepted for RS2GAF-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS2GAF-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS2GAF-T?
RS2GAF-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS2GAF-T 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 RS2GAF-T?
For technical support, including RS2GAF-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS2GAF-T requirements.
6.How does Aetrix verify that RS2GAF-T is sourced from the original manufacturer or authorized distributors?
All RS2GAF-T 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 RS2GAF-T meets industry standards.
7.What is the process for return or replacement of RS2GAF-T?
All RS2GAF-T units undergo pre-shipment inspection (PSI). If there is an issue with RS2GAF-T, 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 RS2GAF-T part is unused and in its original packaging.
Return procedure for RS2GAF-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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