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

Taiwan Semiconductor Corporation RS3G

Name: RS3G
Brand: Taiwan Semiconductor Corporation
SKU: RS3G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: RS3G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AB, SMC

Datasheet:: RS3G.pdf

Description:: DIODE GEN PURP 400V 3A DO214AB

Quantity:: RFQ Add To RFQ list

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Inventory:4,896

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Product details

Overview

RS3G from Taiwan Semiconductor is a fast recovery surface-mount rectifier diode in DO-214AB (SMC) package, rated for 400 V repetitive peak reverse voltage (V_RRM), 3 A average forward current (I_F), and 100 A non-repetitive surge current (I_FSM). It delivers 150 ns reverse recovery time (t_rr) at I_F = 0.5 A, enabling high-efficiency operation in DC-DC converters and snubber circuits.

For engineers reviewing the RS3G datasheet, RS3G pinout, RS3G application, or RS3G equivalent, key selection criteria include its 400 V V_RRM, 1.3 V max forward voltage at 3 A, 150 ns t_rr, DO-214AB thermal resistance (R_θJL = 15 °C/W), and RoHS/halogen-free compliance for industrial power conversion designs.

Technical Context

The RS3G operates as a single-die, unidirectional silicon rectifier with glass-passivated junction for reliability under thermal cycling and humidity. Its fast recovery behavior is characterized under defined test conditions (I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A), yielding t_rr ≤ 150 ns - critical for minimizing switching losses in high-frequency SMPS topologies.

Junction temperature range spans –55 °C to +175 °C, supported by R_θJA = 50 °C/W and R_θJL = 15 °C/W, allowing stable operation in compact, convection-cooled layouts. Cathode polarity is marked by a visible band on the DO-214AB molded body.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - maximum repetitive reverse blocking voltage before breakdown; defines usable input voltage headroom in offline or boost-stage rectification
I_F	3 A - continuous average forward current at T_L = 75 °C; sets steady-state power handling in DC-DC output stages
t_rr	≤150 ns - measured under standardized half-sine recovery test; enables <1 MHz switching in flyback and forward converters
V_F (max)	1.3 V @ 3 A, 25 °C - forward conduction loss directly impacts efficiency and thermal rise in high-current paths
I_FSM	100 A - peak non-repetitive surge rating for transient overload tolerance during startup or fault events
R_θJL	15 °C/W - junction-to-lead thermal resistance; enables direct heatsinking via PCB copper pour or metal-core substrate

Pinout & Package

DO-214AB (SMC) surface-mount package with cathode-indicated band; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side of AC source or switch node; requires adequate trace width for 3 A continuous conduction
Cathode	Forward current exit / reverse blocking terminal	Marked by molded band; ties to output rail or capacitor positive; must withstand full V_RRM during off-state

Key Features

Feature	Design Value
Glass-passivated junction	Enhances moisture resistance and long-term reliability in humid or thermally cycled environments without hermetic sealing
Fast recovery (t_rr ≤ 150 ns)	Reduces reverse recovery charge (Q_rr) and associated switching losses in high-frequency converters (>100 kHz)
DO-214AB mechanical robustness	UL 94V-0 molding compound and 0.210 g mass support automated SMT placement and reflow survivability
Junction temperature limit +175 °C	Enables operation in high-ambient industrial or automotive under-hood applications without derating at full I_F

Applications

DC–DC Converter Output Rectification	Snubber Network Diode
Use Scenario: Used in secondary-side synchronous or freewheeling rectification of isolated DC–DC converters operating at 100–500 kHz. IC Role / Device Role / Timing Role: Unidirectional current steering device that blocks reverse voltage while conducting forward current during energy transfer phase. Use Value: 150 ns t_rr minimizes tail current overlap with switching FETs, reducing conduction loss and EMI generation.	Use Scenario: Placed across switching MOSFETs or IGBTs to clamp voltage spikes during turn-off in motor drives or inverters. IC Role / Device Role / Timing Role: Fast-acting clamp diode that conducts transient energy into RC network before voltage exceeds safe limits. Use Value: 400 V V_RRM and 100 A I_FSM provide margin against 300–400 V bus transients in 24–48 V systems.
Switching Mode Inverter Input Stage	LED Driver Bulk Rectification
Use Scenario: Front-end AC/DC rectification in low-power (<100 W) grid-tied or off-grid inverters with PFC pre-regulators. IC Role / Device Role / Timing Role: Bridge or single-diode rectifier converting line-frequency AC to bulk DC with minimal conduction loss. Use Value: 1.3 V V_F max at 3 A ensures <3.9 W conduction loss per diode, supporting thermal management on standard FR-4 PCBs.	Use Scenario: High-voltage AC input rectification in constant-current LED drivers for street lighting or commercial fixtures. IC Role / Device Role / Timing Role: Primary rectifier converting 120/230 VAC to high-voltage DC bus feeding buck or flyback controller ICs. Use Value: Glass passivation and halogen-free construction meet outdoor IP66/IP67 environmental and regulatory requirements.

DC–DC Converter Output Rectification

Snubber Network Diode

Use Scenario: Used in secondary-side synchronous or freewheeling rectification of isolated DC–DC converters operating at 100–500 kHz.

IC Role / Device Role / Timing Role: Unidirectional current steering device that blocks reverse voltage while conducting forward current during energy transfer phase.

Use Value: 150 ns t_rr minimizes tail current overlap with switching FETs, reducing conduction loss and EMI generation.

Use Scenario: Placed across switching MOSFETs or IGBTs to clamp voltage spikes during turn-off in motor drives or inverters.

IC Role / Device Role / Timing Role: Fast-acting clamp diode that conducts transient energy into RC network before voltage exceeds safe limits.

Use Value: 400 V V_RRM and 100 A I_FSM provide margin against 300–400 V bus transients in 24–48 V systems.

Switching Mode Inverter Input Stage

LED Driver Bulk Rectification

Use Scenario: Front-end AC/DC rectification in low-power (<100 W) grid-tied or off-grid inverters with PFC pre-regulators.

IC Role / Device Role / Timing Role: Bridge or single-diode rectifier converting line-frequency AC to bulk DC with minimal conduction loss.

Use Value: 1.3 V V_F max at 3 A ensures <3.9 W conduction loss per diode, supporting thermal management on standard FR-4 PCBs.

Use Scenario: High-voltage AC input rectification in constant-current LED drivers for street lighting or commercial fixtures.

IC Role / Device Role / Timing Role: Primary rectifier converting 120/230 VAC to high-voltage DC bus feeding buck or flyback controller ICs.

Use Value: Glass passivation and halogen-free construction meet outdoor IP66/IP67 environmental and regulatory requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH3L04S (STMicroelectronics)	Same DO-214AB package, 400 V V_RRM, 3 A I_F, but t_rr = 120 ns (faster), V_F = 1.25 V (lower)	Slightly better efficiency in >300 kHz designs due to lower Q_rr; identical mounting and footprint	Select when tighter t_rr tolerance or lower V_F is required without layout change
VS-3EYH04-M3 (Vishay)	DO-214AB, 400 V V_RRM, 3 A I_F, t_rr = 150 ns (same), but V_F = 1.35 V (higher), I_FSM = 80 A (lower)	Lower surge rating reduces margin in high-transient environments; otherwise functionally interchangeable	Acceptable where surge stress is low and cost sensitivity outweighs 20 A I_FSM gap

Compared with STTH3L04S and VS-3EYH04-M3, the RS3G offers balanced performance: identical t_rr to Vishay but higher I_FSM, and slightly higher V_F than ST but broader availability and qualification history in industrial power supplies.

Availability

RS3G is available at Aetrix Electronics and suitable for DC–DC converter output rectification, snubber networks, switching mode inverters, and LED driver bulk rectification requiring stable component supply and long-lifecycle support.

Supply support for RS3G 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 diodes, and MOSFETs for industrial and consumer markets.

The RS3G belongs to TSC's RS3x fast recovery rectifier family, designed specifically for high-efficiency, high-reliability AC/DC and DC/DC power conversion in space-constrained surface-mount applications.

FAQ

What is the maximum junction temperature rating for the RS3G?

The RS3G has a maximum junction temperature (T_J) rating of +175 °C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet (Version M2304). This allows uninterrupted operation in high-ambient environments such as enclosed industrial power supplies or automotive under-hood modules. Derating begins above 75 °C lead temperature, and thermal design must respect R_θJL = 15 °C/W to maintain safe TJ under full 3 A load. The RS3G remains fully functional down to –55 °C for cold-start applications.

Does the RS3G have a specified reverse recovery time, and under what test conditions?

Yes, the RS3G has a specified reverse recovery time (t_rr) of ≤150 ns, measured under the exact conditions defined in the Taiwan Semiconductor datasheet: I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A, with a half-sine waveform. This value is confirmed across all production lots and is not a typical-only specification. The RS3G t_rr is identical to RS3A, RS3B, and RS3D variants but faster than RS3J (250 ns) and RS3K/RS3M (500 ns), making it suitable for 100–500 kHz switching topologies.

Is the RS3G RoHS and halogen-free compliant?

Yes, the RS3G is fully RoHS compliant and halogen-free, as explicitly stated in the "Features" section of the Taiwan Semiconductor RS3A–RS3M datasheet (Version M2304). Compliance is verified per JEDEC J-STD-020 moisture sensitivity level 1 and meets IPC/JEDEC J-STD-075 material declarations. The DO-214AB molding compound contains no brominated flame retardants or chlorine-based additives, satisfying strict environmental requirements for export to EU, Japan, and North America.

What is the marking code and polarity identification method for the RS3G?

The RS3G is marked with the code "RS3G" on the molded plastic body, adjacent to a green compound indicator (G) and date/factory codes (YW/F), per the official marking diagram in the datasheet. Polarity is unambiguously indicated by a cathode band - a white or silver-colored stripe located near one end of the DO-214AB package. This band corresponds to the cathode terminal, which must be connected toward the higher-potential node in rectifier configurations. No additional silkscreen or orientation aids are required.

What packaging format is available for the RS3G, and how many units per reel?

The RS3G is supplied in tape-and-reel packaging per the ordering information in the Taiwan Semiconductor datasheet: 3,000 units per 12 mm wide embossed plastic carrier tape, compatible with standard 8 mm feeder systems. Reels conform to EIA-481-D standards and include desiccant and humidity indicator cards inside sealed moisture-barrier bags. This packaging supports high-speed automated pick-and-place assembly and satisfies J-STD-020 Level 1 moisture sensitivity requirements without baking prior to reflow.

RS3G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AB, SMC

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 400 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: -

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 150 ns

Current - Reverse Leakage @ Vr:: 10 µA @ 400 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AB (SMC)

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

RS3G FAQ

1.How can I place an order for RS3G through Aetrix?

Please submit a Request for Quotation (RFQ) for RS3G 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 RS3G reliable?

The price and inventory of RS3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS3G is usually 5 days.

3.What payment methods are accepted for RS3G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS3G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for RS3G?

RS3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your RS3G 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 RS3G?

For technical support, including RS3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS3G requirements.

6.How does Aetrix verify that RS3G is sourced from the original manufacturer or authorized distributors?

All RS3G 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 RS3G meets industry standards.

7.What is the process for return or replacement of RS3G?

All RS3G units undergo pre-shipment inspection (PSI). If there is an issue with RS3G, 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 RS3G part is unused and in its original packaging.

Return procedure for RS3G:

1.Submit a request within 90 days.

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

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