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

Taiwan Semiconductor Corporation RS1K-T

Name: RS1K-T
Brand: Taiwan Semiconductor Corporation
SKU: RS1K-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: RS1K-T

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: RS1K-T.pdf

Description:: 500NS, 1A, 800V, FAST RECOVERY R

Quantity:: RFQ Add To RFQ list

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Inventory:2,643

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Product details

Overview

RS1K-T from Taiwan Semiconductor is a 1A, 800V 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 30 A peak surge current capability. It serves as a primary-side output rectifier in high-frequency switching power supplies.

For engineers reviewing the RS1K-T datasheet, RS1K-T pinout, RS1K-T application, or RS1K-T equivalent, key selection criteria include rated V_RRM (800 V), trr (500 ns), thermal resistance R_θJA (105 °C/W), moisture sensitivity level (MSL 1), and RoHS/halogen-free compliance for industrial DC-DC and SMPS designs.

Technical Context

The RS1K-T employs a glass-passivated silicon junction optimized for fast switching in high-frequency converters. Its single-die configuration and DO-214AC package support automated placement while maintaining low forward voltage drop and controlled reverse recovery behavior under 1 A forward conduction.

Designed for operation up to 150 °C junction temperature, it delivers stable performance across -55 °C to +150 °C storage range with 5 µA max reverse leakage at 25 °C and 50 µA at 125 °C, enabling reliable use in thermally constrained environments.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	800 V - Maximum repetitive reverse voltage before breakdown; defines safe operating limit in flyback or forward converter secondary circuits
I_F	1 A continuous - Rated average forward current; determines steady-state power dissipation and heatsink requirements
t_rr	500 ns - Measured at I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A; critical for minimizing switching losses in >100 kHz topologies
V_F (max)	1.3 V at I_F = 1 A, T_J = 25 °C - Directly impacts conduction loss and thermal rise in high-duty-cycle applications
R_θJA	105 °C/W - Junction-to-ambient thermal resistance on standard FR-4 PCB; used to calculate worst-case die temperature without heatsink
I_FSM	30 A (8.3 ms half-sine) - Surge rating for handling inrush or transient overloads without failure
C_J	10 pF at 1 MHz, V_R = 4 V - Junction capacitance affecting high-frequency noise coupling and snubber design

Pinout & Package

Package: DO-214AC (SMA), surface-mount, single anode-cathode configuration. Cathode indicated by molded band. Matte tin-plated leads, J-STD-002 solderable, MSL Level 1.

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

Key Features

Feature	Design Value
Glass passivated junction	Enhances long-term reliability and humidity resistance without requiring conformal coating in humid environments
Fast recovery (500 ns)	Reduces switching loss and EMI generation compared to standard rectifiers in 100–500 kHz SMPS designs
Low V_F (≤1.3 V)	Lowers conduction loss by ~15% vs. comparable 800 V Schottky alternatives rated above 175 °C
MSL Level 1	Enables direct reflow assembly without baking; eliminates pre-conditioning step in high-volume SMT lines
Halogen-free & RoHS	Meets IEC 61249-2-21 and EU Directive 2011/65/EU for environmentally compliant industrial and consumer end equipment

Applications

AC-DC Adapter Secondary Rectification	DC-DC Converter Output Stage
Use Scenario: 12 V/1 A isolated flyback adapter for IoT gateways with 230 V AC input and 65 kHz switching frequency. IC Role / Device Role / Timing Role: Primary-side synchronous rectifier replacement; handles unidirectional current flow during transformer reset phase. Use Value: 500 ns t_rr minimizes reverse recovery tail current, reducing diode-induced ringing and improving efficiency by 0.8% over RS1J-T at full load.	Use Scenario: 48 V to 5 V buck-derived isolated DC-DC module in telecom power shelf with 300 kHz PWM. IC Role / Device Role / Timing Role: Secondary-side freewheeling rectifier in active-clamp forward topology. Use Value: 1.3 V V_F limits conduction loss to <0.8 W at 1 A, enabling compact layout without forced air cooling.
Industrial Motor Drive Snubber Diode	LED Driver Bridge Leg
Use Scenario: RC snubber network across IGBT collector-emitter in 750 W variable-speed drive operating at 16 kHz. IC Role / Device Role / Timing Role: Fast clamping diode absorbing turn-off energy spikes during IGBT commutation. Use Value: 800 V V_RRM and 30 A I_FSM withstand repeated 600 V transients with <10 ns delay, preventing snubber capacitor overstress.	Use Scenario: Single-phase bridge rectifier feeding constant-current LED driver IC in outdoor streetlight fixture. IC Role / Device Role / Timing Role: Input-stage AC line rectification with 50/60 Hz input and 120 Hz ripple output. Use Value: 150 °C T_JMAX and -55 °C to +150 °C T_STG ensure uninterrupted operation in ambient temperatures up to 85 °C enclosure.

AC-DC Adapter Secondary Rectification

DC-DC Converter Output Stage

Use Scenario: 12 V/1 A isolated flyback adapter for IoT gateways with 230 V AC input and 65 kHz switching frequency.

IC Role / Device Role / Timing Role: Primary-side synchronous rectifier replacement; handles unidirectional current flow during transformer reset phase.

Use Value: 500 ns t_rr minimizes reverse recovery tail current, reducing diode-induced ringing and improving efficiency by 0.8% over RS1J-T at full load.

Use Scenario: 48 V to 5 V buck-derived isolated DC-DC module in telecom power shelf with 300 kHz PWM.

IC Role / Device Role / Timing Role: Secondary-side freewheeling rectifier in active-clamp forward topology.

Use Value: 1.3 V V_F limits conduction loss to <0.8 W at 1 A, enabling compact layout without forced air cooling.

Industrial Motor Drive Snubber Diode

LED Driver Bridge Leg

Use Scenario: RC snubber network across IGBT collector-emitter in 750 W variable-speed drive operating at 16 kHz.

IC Role / Device Role / Timing Role: Fast clamping diode absorbing turn-off energy spikes during IGBT commutation.

Use Value: 800 V V_RRM and 30 A I_FSM withstand repeated 600 V transients with <10 ns delay, preventing snubber capacitor overstress.

Use Scenario: Single-phase bridge rectifier feeding constant-current LED driver IC in outdoor streetlight fixture.

IC Role / Device Role / Timing Role: Input-stage AC line rectification with 50/60 Hz input and 120 Hz ripple output.

Use Value: 150 °C T_JMAX and -55 °C to +150 °C T_STG ensure uninterrupted operation in ambient temperatures up to 85 °C enclosure.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R08	Same V_RRM (800 V), slightly faster t_rr (350 ns), higher V_F (1.55 V typ)	Better suited for ultra-high-frequency (>1 MHz) resonant converters where recovery speed dominates loss budget	Select STTH1R08 only when t_rr reduction justifies 19% higher conduction loss at 1 A
ES1J	Same package (DO-214AC), identical t_rr (500 ns), lower V_RRM (600 V), same V_F (1.3 V max)	Limited to ≤600 V systems; unsuitable for 800 V bus designs or universal-input AC-DC front ends	Choose ES1J only if system peak reverse voltage remains below 600 V and cost is prioritized over margin

Compared with STTH1R08 and ES1J, the RS1K-T provides optimal balance of 800 V rating, 500 ns recovery, and 1.3 V forward drop-making it the preferred choice for 600–800 V industrial SMPS where both voltage margin and thermal efficiency matter.

Availability

RS1K-T is available at Aetrix Electronics and suitable for AC-DC adapters, DC-DC converters, and industrial motor drives requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for RS1K-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 RS1K-T belongs to TSC's RS1x-T fast recovery rectifier family, engineered specifically for high-efficiency, high-reliability switching power conversion in space-constrained surface-mount applications.

FAQ

What is the maximum junction temperature rating for the RS1K-T?

The RS1K-T has a maximum junction temperature (T_J) rating of +150 °C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet F2111. This allows sustained operation in thermally demanding environments such as enclosed power supplies or high-ambient industrial enclosures. Derating curves confirm usable current capacity down to 0.6 A at 125 °C ambient on standard PCB layouts. The RS1K-T must not exceed this limit to maintain reliability and avoid parametric shift.

Is the RS1K-T RoHS and halogen-free compliant?

Yes, the RS1K-T is fully RoHS compliant per EU Directive 2011/65/EU and halogen-free per IEC 61249-2-21, as stated in the "Features" section of the Taiwan Semiconductor RS1D-T to RS1M-T datasheet (Version F2111). These certifications apply to the entire RS1x-T family, including RS1K-T, and are verified through material declarations and third-party testing. Compliance ensures suitability for export to EU, Japan, and other regulated markets without restriction.

What does the marking code 'RS1K' indicate on the RS1K-T device body?

The marking code 'RS1K' laser-etched on the RS1K-T case identifies the specific voltage grade within the RS1x-T series: 'K' corresponds to 800 V repetitive peak reverse voltage (V_RRM). This matches the ordering code RS1K-T and is confirmed in the Absolute Maximum Ratings table. Other codes include RS1D (200 V), RS1G (400 V), RS1J (600 V), and RS1M (1000 V). No additional functional or revision information is encoded in the marking.

Can the RS1K-T be used as a direct replacement for RS1J-T in existing designs?

The RS1K-T is not a direct replacement for RS1J-T due to its higher 800 V V_RRM versus 600 V, though both share identical package (DO-214AC), pinout, and thermal characteristics. Substitution requires verification that system peak reverse voltage stays within RS1J-T's 600 V limit - exceeding it risks catastrophic failure. The RS1K-T offers increased voltage margin but no performance penalty; however, layout or bill-of-materials change is required for formal qualification.

What is the reverse recovery time (t_rr) test condition for RS1K-T?

The RS1K-T reverse recovery time is specified as 500 ns under the condition: forward current I_F = 0.5 A, reverse current I_R = 1.0 A, and reverse recovery current I_rr = 0.25 A, per the Electrical Specifications table in the Taiwan Semiconductor datasheet F2111. This test method aligns with JEDEC standards and reflects real-world behavior in hard-switched topologies. The value applies across the full operating temperature range and is not derated at elevated junction temperatures.

RS1K-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):: 800 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 @ 800 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

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

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

RS1K-T FAQ

1.How can I place an order for RS1K-T through Aetrix?

Please submit a Request for Quotation (RFQ) for RS1K-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 RS1K-T reliable?

The price and inventory of RS1K-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS1K-T is usually 5 days.

3.What payment methods are accepted for RS1K-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS1K-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for RS1K-T?

RS1K-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your RS1K-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 RS1K-T?

For technical support, including RS1K-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS1K-T requirements.

6.How does Aetrix verify that RS1K-T is sourced from the original manufacturer or authorized distributors?

All RS1K-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 RS1K-T meets industry standards.

7.What is the process for return or replacement of RS1K-T?

All RS1K-T units undergo pre-shipment inspection (PSI). If there is an issue with RS1K-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 RS1K-T part is unused and in its original packaging.

Return procedure for RS1K-T:

1.Submit a request within 90 days.

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

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