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

Taiwan Semiconductor Corporation RS1M-T

Name: RS1M-T
Brand: Taiwan Semiconductor Corporation
SKU: RS1M-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: RS1M-T

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: RS1M-T.pdf

Description:: 500NS, 1A, 1000V, FAST RECOVERY

Quantity:: RFQ Add To RFQ list

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Inventory:2,455

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Product details

Overview

RS1M-T from Taiwan Semiconductor is a 1A, 1000V fast recovery surface-mount rectifier in DO-214AC (SMA) package, featuring 500 ns reverse recovery time, 1.3 V max forward voltage at 1 A, and 5 µA max reverse leakage at 25°C. It serves as a primary-side output rectifier in high-frequency switching power supplies.

For engineers reviewing the RS1M-T datasheet, RS1M-T pinout, RS1M-T application, or RS1M-T equivalent, key selection criteria include peak repetitive reverse voltage rating, thermal resistance (R_θJA = 105°C/W), junction temperature range (–55°C to +150°C), and moisture sensitivity level (J-STD-020 Level 1).

Technical Context

The RS1M-T employs a single-die, glass-passivated PN junction optimized for fast switching in high-frequency DC/DC converters. Its 1000 V V_RRM and 500 ns trr enable operation in 100 kHz–500 kHz topologies with low switching loss.

Thermally, it delivers R_θJC = 32°C/W and R_θJA = 105°C/W under standard JEDEC PCB conditions, supporting continuous 1 A conduction up to 125°C ambient when properly mounted on ≥1 cm² copper area.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1000 V - supports primary-side rectification in offline SMPS with ≥650 V DC bus derating margin
I_F	1 A continuous - rated for steady-state output current in compact adapter and auxiliary supply designs
t_rr	500 ns - enables efficient operation in 200–500 kHz flyback and forward converters
V_F max	1.3 V @ 1 A, 25°C - limits conduction loss to ≤1.3 W at full load, easing thermal design
I_R max	5 µA @ 25°C - ensures minimal standby leakage in energy-efficient power supplies
R_θJA	105 °C/W - requires ≥1 cm² of 1 oz copper pad for safe 1 A operation at 70°C ambient
Junction temp	–55°C to +150°C - qualified for industrial and extended-temperature embedded power rails

Pinout & Package

DO-214AC (SMA) surface-mount package with cathode-indicating band; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 1A whisker resistance.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Input terminal for forward conduction path	Connected to lower-potential node (e.g., transformer secondary center-tap or switch node)
Cathode	Output terminal for forward conduction path	Connected to output capacitor positive rail; polarity marked by molded band

Key Features

Feature	Design Value
Glass passivated junction	Enhances humidity resistance and long-term reliability in reflow-soldered industrial assemblies
Fast recovery (500 ns)	Reduces switching loss and EMI generation compared to standard rectifiers in >100 kHz designs
Moisture sensitivity Level 1	Eliminates bake requirement prior to SMT assembly, lowering manufacturing cost and cycle time
RoHS & halogen-free	Meets IEC 61249-2-21 and global environmental compliance mandates for consumer and industrial end equipment

Applications

AC/DC Adapter Output Rectification	Industrial DC/DC Converter Primary-Side Clamp
Use Scenario: 12 V/1 A isolated flyback adapter for IoT gateways operating at 250 kHz switching frequency. IC Role / Device Role / Timing Role: Output rectifier converting high-frequency transformer secondary AC to regulated DC. Use Value: 500 ns t_rr minimizes reverse recovery loss, improving efficiency by ~1.2% over 1 µs rectifiers at full load.	Use Scenario: 48 V input, 5 V/1 A industrial DC/DC module with active clamp forward topology. IC Role / Device Role / Timing Role: Clamp diode absorbing transformer leakage energy during MOSFET turn-off. Use Value: 1000 V V_RRM provides 2× margin over 48 V × 4.5× clamp ratio, ensuring robustness against voltage spikes.
Automotive Infotainment Power Supply	LED Driver Auxiliary Rail Rectification
Use Scenario: 12 V automotive infotainment head unit requiring –40°C to +105°C operation with transient immunity. IC Role / Device Role / Timing Role: Input rectifier in buck-derived auxiliary 3.3 V rail fed from vehicle battery. Use Value: –55°C to +150°C junction rating and J-STD-020 Level 1 handling support unbuffered reflow and under-hood thermal cycling.	Use Scenario: Constant-current LED driver with integrated 15 V auxiliary bias supply derived from main transformer winding. IC Role / Device Role / Timing Role: Secondary-side rectifier feeding linear regulator input for analog control circuitry. Use Value: 1.3 V V_F max ensures stable 15 V rail across line/load variation without thermal runaway risk.

AC/DC Adapter Output Rectification

Industrial DC/DC Converter Primary-Side Clamp

Use Scenario: 12 V/1 A isolated flyback adapter for IoT gateways operating at 250 kHz switching frequency.

IC Role / Device Role / Timing Role: Output rectifier converting high-frequency transformer secondary AC to regulated DC.

Use Value: 500 ns t_rr minimizes reverse recovery loss, improving efficiency by ~1.2% over 1 µs rectifiers at full load.

Use Scenario: 48 V input, 5 V/1 A industrial DC/DC module with active clamp forward topology.

IC Role / Device Role / Timing Role: Clamp diode absorbing transformer leakage energy during MOSFET turn-off.

Use Value: 1000 V V_RRM provides 2× margin over 48 V × 4.5× clamp ratio, ensuring robustness against voltage spikes.

Automotive Infotainment Power Supply

LED Driver Auxiliary Rail Rectification

Use Scenario: 12 V automotive infotainment head unit requiring –40°C to +105°C operation with transient immunity.

IC Role / Device Role / Timing Role: Input rectifier in buck-derived auxiliary 3.3 V rail fed from vehicle battery.

Use Value: –55°C to +150°C junction rating and J-STD-020 Level 1 handling support unbuffered reflow and under-hood thermal cycling.

Use Scenario: Constant-current LED driver with integrated 15 V auxiliary bias supply derived from main transformer winding.

IC Role / Device Role / Timing Role: Secondary-side rectifier feeding linear regulator input for analog control circuitry.

Use Value: 1.3 V V_F max ensures stable 15 V rail across line/load variation without thermal runaway risk.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R06	1 A, 600 V V_RRM, 150 ns t_rr, TO-277 package	Limited to ≤600 V circuits; lower trr improves light-load efficiency but reduces voltage margin	Select when system peak reverse stress < 420 V and faster switching is prioritized over voltage headroom
MBR1100	1 A, 1000 V, Schottky construction, 0.85 V V_F, no reverse recovery	No trr-related EMI; higher IR (100 µA @ 125°C) risks standby loss in always-on systems	Prefer where low V_F dominates efficiency goals and reverse leakage is actively managed

Compared with STTH1R06 and MBR1100, the RS1M-T uniquely balances 1000 V capability with 500 ns trr and 5 µA IR - making it optimal for cost-sensitive, high-voltage, medium-frequency industrial SMPS where Schottky leakage or lower-V_RRM alternatives compromise safety margin or thermal stability.

Availability

RS1M-T is available at Aetrix Electronics and suitable for AC/DC adapters, industrial DC/DC converters, and automotive infotainment power supplies requiring stable component supply and J-STD-020 Level 1 handling.

Supply support for RS1M-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 RS1M-T belongs to TSC's RS1x-T fast recovery rectifier family, engineered specifically for high-efficiency, surface-mount switching power supplies operating above 100 kHz with stringent thermal and reliability requirements.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for RS1M-T?

The RS1M-T has a maximum repetitive peak reverse voltage (V_RRM) of 1000 V, confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version F2111). This rating allows the RS1M-T to safely operate in offline SMPS designs with DC bus voltages up to 700 V while maintaining ≥30% safety margin. The "M" in RS1M-T explicitly denotes the 1000 V grade within the RS1x-T series.

Does RS1M-T have a specified reverse recovery time (t_rr)?

Yes, the RS1M-T has a specified reverse recovery time (t_rr) of 500 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A conditions per the Electrical Specifications table. This value is distinct from lower-voltage variants (e.g., RS1D-T = 150 ns) and is validated in Figure 6 of the RS1D-T–RS1M-T datasheet. The 500 ns t_rr reflects its optimized trade-off between speed and high-voltage ruggedness.

What package type does RS1M-T use, and is it RoHS compliant?

The RS1M-T uses the DO-214AC (SMA) surface-mount package with matte tin-plated leads, and it is RoHS compliant and halogen-free per IEC 61249-2-21. The package outline, pad layout, and marking diagram are documented in Version F2111 of the Taiwan Semiconductor datasheet. Moisture sensitivity is rated Level 1 per J-STD-020, eliminating pre-bake requirements before reflow soldering.

What is the forward voltage drop (V_F) of RS1M-T at rated current?

The RS1M-T has a maximum forward voltage drop (V_F) of 1.3 V at 1 A forward current and 25°C junction temperature, as specified in the Electrical Specifications table. Typical V_F is lower, but design margins must use the 1.3 V maximum. This value increases with temperature - at 125°C, V_F rises to approximately 1.15 V, maintaining predictable conduction loss across the full operating range.

Can RS1M-T replace RS1K-T in an existing design?

RS1M-T can replace RS1K-T only if the circuit's peak reverse voltage exceeds 800 V and the design accommodates identical 500 ns t_rr behavior. While both share DO-214AC packaging and 1 A rating, RS1M-T's 1000 V V_RRM offers greater voltage margin than RS1K-T's 800 V rating. No PCB changes are required due to identical footprint and polarity marking, but thermal and EMI validation is recommended given identical trr and slightly higher V_F at elevated temperatures.

RS1M-T Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AC, SMA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 1000 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):: 500 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 1000 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AC (SMA)

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

RS1M-T FAQ

1.How can I place an order for RS1M-T through Aetrix?

Please submit a Request for Quotation (RFQ) for RS1M-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 RS1M-T reliable?

The price and inventory of RS1M-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS1M-T is usually 5 days.

3.What payment methods are accepted for RS1M-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS1M-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for RS1M-T?

RS1M-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your RS1M-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 RS1M-T?

For technical support, including RS1M-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS1M-T requirements.

6.How does Aetrix verify that RS1M-T is sourced from the original manufacturer or authorized distributors?

All RS1M-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 RS1M-T meets industry standards.

7.What is the process for return or replacement of RS1M-T?

All RS1M-T units undergo pre-shipment inspection (PSI). If there is an issue with RS1M-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 RS1M-T part is unused and in its original packaging.

Return procedure for RS1M-T:

1.Submit a request within 90 days.

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

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