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

Taiwan Semiconductor Corporation RS1DF-T

Name: RS1DF-T
Brand: Taiwan Semiconductor Corporation
SKU: RS1DF-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: RS1DF-T

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-221AC, SMA Flat Leads

Datasheet:: RS1DF-T.pdf

Description:: 150NS, 1A, 200V, FAST RECOVERY R

Quantity:: RFQ Add To RFQ list

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Inventory:7,500

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Product details

Overview

RS1DF-T from Taiwan Semiconductor is a 1 A, 200 V fast recovery surface-mount rectifier diode in SMAF package, featuring 150 ns reverse recovery time, 1.00 V forward voltage at 1.0 A/25°C, and 30 A surge current capability; it serves as primary output rectifier in low-voltage DC-DC converters.

For engineers reviewing the RS1DF-T datasheet, RS1DF-T pinout, RS1DF-T application, or RS1DF-T equivalent, key selection criteria include V_RRM = 200 V, I_F = 1 A, t_rr ≤ 150 ns, thermal resistance R_θJA = 89 °C/W, and SMAF surface-mount compatibility for high-density power stage layouts.

Technical Context

The RS1DF-T is a single-die, glass-passivated silicon PN junction rectifier optimized for switching-mode power supplies operating up to 200 kHz. Its fast recovery (t_rr ≤ 150 ns) minimizes switching losses during turn-off, while low leakage (I_R ≤ 5 µA at 25°C) supports stable hold-up in standby modes.

Thermal performance is defined for mounting on a 5 mm × 5 mm copper pad: R_θJL = 15 °C/W enables efficient heat transfer to PCB traces, and T_J(max) = 150 °C allows operation in compact, convection-cooled industrial enclosures without forced airflow.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Maximum repetitive reverse voltage; sets safe operating limit in 12–48 V output rectification with 2× margin.
I_F	1 A continuous - Rated average forward current; supports 12 W output at 12 V with typical derating above 75°C ambient.
t_rr	≤150 ns - Reverse recovery time; enables efficient operation in 100–200 kHz SMPS without excessive switching loss or EMI.
V_F	1.00 V @ 1 A / 25°C - Forward voltage drop; contributes ~1.0 W conduction loss at full load, manageable with minimal copper area.
I_FSM	30 A @ 8.3 ms - Non-repetitive surge rating; withstands inrush currents during cold-start of DC-DC modules.
R_θJA	89 °C/W - Junction-to-ambient thermal resistance on standard test board; defines temperature rise under steady-state 1 A load.

Pinout & Package

Package: SMAF (Surface Mount Axial Flat), molded plastic case with matte tin-plated leads, polarity indicated by cathode band, UL 94V-0 rated compound, weight ≈ 0.035 g.

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 return); must route with low-inductance path.
Cathode	Forward current exit point	Connected to output rail; cathode band marking ensures correct orientation during automated placement and visual inspection.

Key Features

Feature	Design Value
Glass passivated junction	Enables stable long-term reliability and low leakage (<5 µA at 25°C) under humid or thermally cycled conditions.
Moisture sensitivity level 1	Eliminates bake requirement prior to reflow; compatible with standard J-STD-020 assembly processes without floor-life restrictions.
RoHS & halogen-free compliance	Meets IEC 61249-2-21 and EU RoHS directives; suitable for consumer, industrial, and telecom end-equipment without substance-of-concern reporting.
Low R_θJL = 15 °C/W	Supports direct thermal coupling to PCB copper; reduces need for thermal vias or external heatsinking in space-constrained designs.

Applications

DC-DC Converter Output Rectification	Switching Inverter Freewheeling Diode
Use Scenario: Secondary-side rectification in isolated 12 V/1 A buck-derived DC-DC module for industrial PLC I/O modules. IC Role / Device Role / Timing Role: Unidirectional current valve converting transformer AC output to regulated DC; conducts only during positive half-cycle. Use Value: 150 ns t_rr limits reverse recovery charge (Q_rr) to <15 nC, reducing switching loss and EMI generation at 150 kHz operation.	Use Scenario: Freewheeling path for inductive load current in 24 V H-bridge motor driver inverters. IC Role / Device Role / Timing Role: Provides low-loss return path when upper MOSFETs are off; clamps inductive kickback within V_RRM margin. Use Value: 30 A I_FSM handles peak motor stall currents; 1.00 V V_F keeps freewheeling conduction loss below 1 W at 1 A RMS.
AC-DC Adapter Secondary Rectifier	General-Purpose Low-Power Supply
Use Scenario: Output rectifier in 5 V/1 A flyback adapter for IoT sensor hubs with strict no-load power budget. IC Role / Device Role / Timing Role: Converts high-frequency transformer output to DC; blocks reverse current during transformer reset phase. Use Value: 5 µA max I_R at 25°C minimizes standby leakage, supporting <30 mW no-load consumption per IEC 62301 Class B.	Use Scenario: Input rectifier in 12 V/0.5 A offline linear regulator supply for microcontroller bias rails. IC Role / Device Role / Timing Role: Half-wave or full-wave rectification of 50/60 Hz mains-derived AC; operates well below f_SW limit due to fast recovery. Use Value: SMAF package enables compact layout; 150°C T_J(max) ensures robustness against ambient temperature spikes in enclosed enclosures.

DC-DC Converter Output Rectification

Switching Inverter Freewheeling Diode

Use Scenario: Secondary-side rectification in isolated 12 V/1 A buck-derived DC-DC module for industrial PLC I/O modules.

IC Role / Device Role / Timing Role: Unidirectional current valve converting transformer AC output to regulated DC; conducts only during positive half-cycle.

Use Value: 150 ns t_rr limits reverse recovery charge (Q_rr) to <15 nC, reducing switching loss and EMI generation at 150 kHz operation.

Use Scenario: Freewheeling path for inductive load current in 24 V H-bridge motor driver inverters.

IC Role / Device Role / Timing Role: Provides low-loss return path when upper MOSFETs are off; clamps inductive kickback within V_RRM margin.

Use Value: 30 A I_FSM handles peak motor stall currents; 1.00 V V_F keeps freewheeling conduction loss below 1 W at 1 A RMS.

AC-DC Adapter Secondary Rectifier

General-Purpose Low-Power Supply

Use Scenario: Output rectifier in 5 V/1 A flyback adapter for IoT sensor hubs with strict no-load power budget.

IC Role / Device Role / Timing Role: Converts high-frequency transformer output to DC; blocks reverse current during transformer reset phase.

Use Value: 5 µA max I_R at 25°C minimizes standby leakage, supporting <30 mW no-load consumption per IEC 62301 Class B.

Use Scenario: Input rectifier in 12 V/0.5 A offline linear regulator supply for microcontroller bias rails.

IC Role / Device Role / Timing Role: Half-wave or full-wave rectification of 50/60 Hz mains-derived AC; operates well below f_SW limit due to fast recovery.

Use Value: SMAF package enables compact layout; 150°C T_J(max) ensures robustness against ambient temperature spikes in enclosed enclosures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R02FL	V_RRM = 200 V, I_F = 1 A, t_rr = 100 ns, SMA package (not SMAF), R_θJA = 100 °C/W	Slightly faster recovery but higher thermal resistance; requires larger copper area for same junction temperature.	Prefer STTH1R02FL where ultra-low Q_rr is critical and board space allows larger thermal pad.
ON Semi MUR120	V_RRM = 200 V, I_F = 1 A, t_rr = 75 ns, DO-41 through-hole package	Through-hole mounting; incompatible with SMT-only production; superior t_rr but no surface-mount advantage.	Select MUR120 only for prototyping or legacy through-hole designs; not suitable for volume SMT assembly.

Compared with STTH1R02FL and MUR120, the RS1DF-T offers optimal balance of SMT compatibility (SMAF), thermal performance (R_θJA = 89 °C/W), and cost-effective fast recovery (150 ns) for mid-frequency DC-DC and inverter applications requiring automated placement.

Availability

RS1DF-T is available at Aetrix Electronics and suitable for DC-DC converter output rectification, switching inverter freewheeling paths, and general-purpose low-power supply designs requiring stable component supply and consistent parametric performance across production lots.

Supply support for RS1DF-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, specializing in power rectifiers, TVS devices, and MOSFETs for industrial and consumer markets.

The RS1DF-T belongs to TSC's RS1x series of fast recovery surface-mount rectifiers, designed specifically for high-efficiency, high-density switching power supplies where low t_rr, stable V_F, and SMT manufacturability are prioritized over ultra-high-speed or ultra-low-V_F trade-offs.

FAQ

What is the maximum junction temperature rating for the RS1DF-T?

The RS1DF-T has a maximum junction temperature (T_J(max)) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet Version B2103. This rating applies under continuous DC forward current conditions and allows reliable operation in industrial environments with ambient temperatures up to +85°C when mounted on a 5 mm × 5 mm copper pad. Derating curves confirm usable current capacity down to zero at 150°C junction temperature.

Does the RS1DF-T have a specified reverse recovery time, and how is it measured?

Yes, the RS1DF-T has a reverse recovery time (t_rr) of ≤150 ns, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A at T_J = 25°C, per the Electrical Specifications table in the Taiwan Semiconductor datasheet. This value reflects the time required for minority carriers to clear after forward conduction, directly impacting switching loss and EMI in high-frequency converters.

Is the RS1DF-T compliant with RoHS and halogen-free standards?

Yes, the RS1DF-T is RoHS compliant and halogen-free according to IEC 61249-2-21, as explicitly stated in the FEATURES section of the Taiwan Semiconductor datasheet. The device uses matte tin-plated leads and a molding compound free of brominated flame retardants, satisfying environmental requirements for consumer, industrial, and telecom equipment without exemptions.

What is the thermal resistance from junction to ambient for the RS1DF-T, and under what conditions is it specified?

The junction-to-ambient thermal resistance (R_θJA) of the RS1DF-T is 89 °C/W, specified for mounting on a standard test board with a 5 mm × 5 mm copper pad per JEDEC JESD51-3. This value assumes natural convection cooling and defines the temperature rise above ambient at 1 A DC forward current; actual performance may improve with additional copper area or thermal vias.

How is polarity marked on the RS1DF-T, and what does the marking code indicate?

Polarity on the RS1DF-T is indicated by a cathode band printed on the body, aligned with the cathode terminal. The marking code "RS1DF" appears adjacent to the band, confirming the exact part variant (200 V V_RRM). This marking is visible post-reflow and supports both automated optical inspection (AOI) and manual verification during assembly and repair of the RS1DF-T.

RS1DF-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):: 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 @ 200 V

Capacitance @ Vr, F:: 9pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMAF

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

RS1DF-T FAQ

1.How can I place an order for RS1DF-T through Aetrix?

Please submit a Request for Quotation (RFQ) for RS1DF-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 RS1DF-T reliable?

The price and inventory of RS1DF-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS1DF-T is usually 5 days.

3.What payment methods are accepted for RS1DF-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS1DF-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for RS1DF-T?

RS1DF-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your RS1DF-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 RS1DF-T?

For technical support, including RS1DF-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS1DF-T requirements.

6.How does Aetrix verify that RS1DF-T is sourced from the original manufacturer or authorized distributors?

All RS1DF-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 RS1DF-T meets industry standards.

7.What is the process for return or replacement of RS1DF-T?

All RS1DF-T units undergo pre-shipment inspection (PSI). If there is an issue with RS1DF-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 RS1DF-T part is unused and in its original packaging.

Return procedure for RS1DF-T:

1.Submit a request within 90 days.

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

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