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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation RS2DAF-T

Name: RS2DAF-T
Brand: Taiwan Semiconductor Corporation
SKU: RS2DAF-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: RS2DAF-T

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-221AC, SMA Flat Leads

Datasheet:: RS2DAF-T.pdf

Description:: 150NS, 2A, 200V, FAST RECOVERY R

Quantity:: RFQ Add To RFQ list

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Inventory:7,500

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Product details

Overview

RS2DAF-T from Taiwan Semiconductor is a 2A, 200V fast recovery surface-mount rectifier in SMAF package, featuring 0.93V forward voltage at 2A/25°C, 150ns reverse recovery time, and 15°C/W junction-to-lead thermal resistance. It serves as a primary output rectifier in DC–DC converters and switching-mode power supplies where low conduction loss and fast switching are required.

For engineers reviewing the RS2DAF-T datasheet, RS2DAF-T pinout, RS2DAF-T application, or RS2DAF-T equivalent, key selection criteria include its 200V V_RRM, 50A I_FSM, JESD201 Class 1 whisker resistance, moisture sensitivity level 1, and RoHS/halogen-free compliance for high-reliability industrial and computing power designs.

Technical Context

This device is a single-die, glass-passivated silicon PN junction rectifier optimized for high-frequency switching operation. Its fast recovery (≤150ns) and low reverse leakage (≤5µA at 25°C) enable efficient energy transfer in flyback and forward converter topologies.

The SMAF package provides robust thermal performance with R_θJL = 15°C/W and meets UL 94V-0 flammability rating. Cathode polarity is marked by a visible band, and matte tin-plated leads ensure reliable solderability per J-STD-002.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Maximum repetitive reverse blocking voltage; defines safe operating range in bridge or output rectification circuits
I_F	2 A - Continuous average forward current; determines steady-state power handling capability on standard PCB copper pads
I_FSM	50 A - Non-repetitive surge current (8.3ms half-sine); supports inrush and transient overload tolerance
t_rr	150 ns - Reverse recovery time at I_F=0.5A, I_R=1.0A, I_RR=0.25A; limits switching losses in >100kHz SMPS
V_F	0.93 V - Forward voltage drop at I_F=2A, T_J=25°C; directly impacts conduction loss and thermal rise
R_θJL	15 °C/W - Junction-to-lead thermal resistance; enables accurate thermal modeling when mounted on 5mm×5mm Cu pad
I_R	5 µA - Max reverse leakage at rated V_RRM, 25°C; critical for low-power standby and high-impedance bias networks

Pinout & Package

SMAF (Surface Mount Axial Flat) package: molded plastic case with gull-wing leads, cathode indicated by band, 0.035g weight, UL 94V-0 rated compound, JESD201 Class 1 whisker resistance, and matte tin-plated terminals.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side (e.g., transformer secondary center-tap or switch node)
Cathode	Forward current exit / reverse blocking terminal	Marked by band; connects to output filter capacitor positive rail or common return path

Key Features

Feature	Design Value
Glass passivated junction	Enhances long-term reliability under humidity and thermal cycling; eliminates need for conformal coating in IPC Class 2 environments
Moisture sensitivity level 1	Zero floor life limitation - can be mounted directly from dry pack without baking, reducing SMT line downtime
RoHS and halogen-free	Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing and end-of-life processing
Low V_F at high temperature	0.80 V at 2A/125°C - maintains efficiency in thermally constrained enclosures without derating penalties

Applications

DC–DC Converter Output Rectification	Switching Mode Inverter Freewheeling
Use Scenario: Secondary-side synchronous or diode rectification in isolated 12V–48V telecom DC–DC modules. IC Role / Device Role / Timing Role: Unidirectional current steering and AC-to-DC conversion during transformer demagnetization phase. Use Value: 0.93V V_F minimizes conduction loss; 150ns t_rr reduces switching node ringing and EMI generation.	Use Scenario: Freewheeling path in H-bridge motor inverters for HVAC blowers and industrial pumps. IC Role / Device Role / Timing Role: Provides low-loss recirculation path for inductive kickback during PWM dead-time intervals. Use Value: 50A I_FSM withstands motor startup surges; glass passivation ensures stable operation under vibration and thermal stress.
General-Purpose Power Supply Input Stage	Industrial PLC Power Rail Protection
Use Scenario: Input rectification in universal-input (85–265VAC) offline SMPS for embedded controllers. IC Role / Device Role / Timing Role: Converts AC line input to unregulated DC bus prior to PFC or primary-side regulation. Use Value: 200V V_RRM supports 170V peak line + margin; 15°C/W R_θJL simplifies thermal design on compact PCBs.	Use Scenario: Reverse polarity and back-EMF protection on 24VDC auxiliary rails in programmable logic controller I/O modules. IC Role / Device Role / Timing Role: Blocks reverse current flow and clamps inductive transients during field-device disconnection. Use Value: ≤5µA I_R prevents battery drain in always-on backup circuits; SMAF footprint fits dense I/O connector layouts.

DC–DC Converter Output Rectification

Switching Mode Inverter Freewheeling

Use Scenario: Secondary-side synchronous or diode rectification in isolated 12V–48V telecom DC–DC modules.

IC Role / Device Role / Timing Role: Unidirectional current steering and AC-to-DC conversion during transformer demagnetization phase.

Use Value: 0.93V V_F minimizes conduction loss; 150ns t_rr reduces switching node ringing and EMI generation.

Use Scenario: Freewheeling path in H-bridge motor inverters for HVAC blowers and industrial pumps.

IC Role / Device Role / Timing Role: Provides low-loss recirculation path for inductive kickback during PWM dead-time intervals.

Use Value: 50A I_FSM withstands motor startup surges; glass passivation ensures stable operation under vibration and thermal stress.

General-Purpose Power Supply Input Stage

Industrial PLC Power Rail Protection

Use Scenario: Input rectification in universal-input (85–265VAC) offline SMPS for embedded controllers.

IC Role / Device Role / Timing Role: Converts AC line input to unregulated DC bus prior to PFC or primary-side regulation.

Use Value: 200V V_RRM supports 170V peak line + margin; 15°C/W R_θJL simplifies thermal design on compact PCBs.

Use Scenario: Reverse polarity and back-EMF protection on 24VDC auxiliary rails in programmable logic controller I/O modules.

IC Role / Device Role / Timing Role: Blocks reverse current flow and clamps inductive transients during field-device disconnection.

Use Value: ≤5µA I_R prevents battery drain in always-on backup circuits; SMAF footprint fits dense I/O connector layouts.

Equivalent & Alternatives

The following parts are listed as comparable options for similar fast recovery rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH2R02FL	2A, 200V, TO-220AC package; 1.05V V_F @2A/25°C; 125ns t_rr; R_θJA = 50°C/W (with heatsink)	Requires through-hole mounting and external heatsinking; unsuitable for ultra-thin or double-sided SMT assemblies	Select when higher surge rating (60A I_FSM) and forced-air cooling are available
MBR220LSFT1G	2A, 200V Schottky; 0.52V V_F @2A/25°C; no reverse recovery; 125°C T_JMAX	Limited to ≤125°C operation; higher reverse leakage (>100µA @125°C) compromises high-temp standby efficiency	Select when lowest conduction loss is critical and ambient temperature stays below 105°C

Compared with STTH2R02FL and MBR220LSFT1G, RS2DAF-T offers optimal balance of SMT compatibility, 150°C junction rating, and controlled reverse recovery for cost-sensitive industrial power supplies where thermal management space is constrained but high-temperature reliability is mandatory.

Availability

RS2DAF-T is available at Aetrix Electronics and suitable for DC–DC converter output rectification, switching mode inverter freewheeling, and general-purpose power supply input stage applications requiring stable component supply and full traceability.

Supply support for RS2DAF-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 global industrial, computing, and consumer markets since 1979.

The RS2x series was developed specifically for high-efficiency, surface-mount power conversion systems demanding fast recovery, low leakage, and robust thermal performance in compact form factors.

FAQ

What is the maximum junction temperature rating for RS2DAF-T?

The RS2DAF-T has a maximum junction temperature (T_JMAX) of +150°C, validated across its full operating range. This rating allows sustained operation in sealed industrial enclosures and automotive under-hood auxiliary power supplies where ambient temperatures exceed 85°C. The device's thermal resistance values (R_θJL = 15°C/W, R_θJA = 89°C/W) are measured on a 5mm × 5mm copper pad, enabling precise thermal margin calculation for RS2DAF-T in real-world PCB layouts.

Does RS2DAF-T meet lead-free and halogen-free compliance standards?

Yes, RS2DAF-T is fully RoHS compliant and halogen-free per IEC 61249-2-21. Its matte tin-plated leads are solderable per J-STD-002, and the molding compound meets UL 94V-0 flammability requirements. These certifications are verified in Taiwan Semiconductor's official qualification reports for version B2103, confirming RS2DAF-T's suitability for green manufacturing and environmentally regulated end equipment.

What is the reverse recovery time specification for RS2DAF-T?

The RS2DAF-T has a maximum reverse recovery time (t_rr) of 150 ns, tested under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_RR = 0.25 A. This value is confirmed in the Electrical Specifications table of the official datasheet (Version B2103) and applies specifically to RS2DAF-T - not extrapolated from higher-voltage variants. The 150 ns t_rr enables clean switching in 200–500 kHz DC–DC converters without excessive snubber losses.

Is RS2DAF-T suitable for use in moisture-prone environments?

Yes, RS2DAF-T carries moisture sensitivity level (MSL) 1 per J-STD-020, meaning it has unlimited floor life at ≤30°C/60% RH and requires no baking before reflow. Its glass-passivated chip junction and UL 94V-0 molding compound provide intrinsic protection against humidity-induced degradation, making RS2DAF-T appropriate for outdoor-rated power adapters and industrial control cabinets exposed to condensation cycles.

What does the "-T" suffix indicate in RS2DAF-T?

The "-T" suffix in RS2DAF-T denotes tape-and-reel packaging: 7,500 units per reel, compatible with standard SMT pick-and-place equipment. This packaging format ensures consistent feeding accuracy and ESD-safe handling during high-volume assembly. The "-T" designation is defined in Taiwan Semiconductor's Ordering Information section (Version B2103) and applies uniformly across the RS2x series, including RS2DAF-T, RS2GAF-T, and RS2MAF-T.

RS2DAF-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):: 200 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 @ 200 V

Capacitance @ Vr, F:: 21pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMAF

Operating Temperature - Junction:: -55°C ~ 150°C

RS2DAF-T FAQ

1.How can I place an order for RS2DAF-T through Aetrix?

Please submit a Request for Quotation (RFQ) for RS2DAF-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 RS2DAF-T reliable?

The price and inventory of RS2DAF-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS2DAF-T is usually 5 days.

3.What payment methods are accepted for RS2DAF-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS2DAF-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for RS2DAF-T?

RS2DAF-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your RS2DAF-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 RS2DAF-T?

For technical support, including RS2DAF-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS2DAF-T requirements.

6.How does Aetrix verify that RS2DAF-T is sourced from the original manufacturer or authorized distributors?

All RS2DAF-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 RS2DAF-T meets industry standards.

7.What is the process for return or replacement of RS2DAF-T?

All RS2DAF-T units undergo pre-shipment inspection (PSI). If there is an issue with RS2DAF-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 RS2DAF-T part is unused and in its original packaging.

Return procedure for RS2DAF-T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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