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

Taiwan Semiconductor Corporation S3JFS

Name: S3JFS
Brand: Taiwan Semiconductor Corporation
SKU: S3JFS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S3JFS

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-128

Datasheet:: S3JFS.pdf

Description:: 3A, 600V, STANDARD RECOVERY RECT

Quantity:: RFQ Add To RFQ list

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Inventory:28,000

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Product details

Overview

S3JFS from Taiwan Semiconductor is a 3A, 600V standard surface-mount rectifier diode in SOD-128 package, featuring glass-passivated junction, 1.03V forward voltage at 3A/25°C, 50A surge rating, and 150°C max junction temperature. It serves as primary output rectifier in DC-DC converters and switching inverters.

For engineers reviewing the S3JFS datasheet, S3JFS pinout, S3JFS application, or S3JFS equivalent, key selection criteria include repetitive peak reverse voltage (600V), forward current rating (3A), thermal resistance (R_θJL = 14°C/W), moisture sensitivity level (MSL 1), and cathode-band polarity marking.

Technical Context

The S3JFS is a single-die, standard recovery silicon rectifier optimized for high-efficiency switching power supplies. Its glass-passivated junction ensures stable reverse leakage (<1µA @ 25°C, <7µA @ 125°C) and robust surge capability (50A I_FSM, 8.3ms half-sine).

Thermal performance is defined for PCB mounting on 5mm × 5mm copper pads: R_θJA = 74°C/W, R_θJC = 20°C/W, and R_θJL = 14°C/W - enabling reliable operation up to 150°C junction temperature in compact layouts.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	600 V - supports input stages in 400V AC-derived SMPS and industrial DC bus rectification
I_F	3 A continuous - suitable for mid-power output rectification in 30–60W converters
I_FSM	50 A (8.3ms) - withstands startup surges and transient overloads without failure
V_F	1.03 V @ 3A/25°C - limits conduction loss to ~3.1 W at full load, aiding thermal management
T_J max	150 °C - enables operation in sealed enclosures or high-ambient environments
R_θJL	14 °C/W - allows direct heat transfer to PCB copper, reducing need for external heatsinking
C_J	14 pF @ 1MHz/4V - minimizes switching noise and EMI in high-frequency topologies

Pinout & Package

Package: SOD-128 - low-profile, surface-mount plastic case (JEDEC DO-221AD compliant), matte tin-plated leads, MSL Level 1, UL 94V-0 rated molding compound, cathode indicated by band.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry point during forward conduction	Connected to lower-potential node (e.g., transformer secondary center-tap or switch node)
Cathode	Current exit point during forward conduction; marked with band	Connected to output rail or filter capacitor positive; polarity critical for correct rectification

Key Features

Feature	Design Value
Glass-passivated junction	Ensures long-term stability of reverse leakage and breakdown characteristics under humidity and thermal cycling
MSL Level 1 rating	Permits unlimited floor life and standard reflow without baking, simplifying SMT line integration
Low-profile SOD-128 package	Enables ≤1.2 mm board height - ideal for space-constrained power modules and slim adapters
RoHS & halogen-free compliance	Meets global environmental regulations and supports lead-free assembly with J-STD-002 solderability
JESD201 Class 2 whisker resistance	Prevents tin whisker growth under thermal stress, enhancing field reliability in automotive and industrial use

Applications

DC-DC Converter Output Rectification	Switching Inverter Input Stage
Use Scenario: Secondary-side synchronous or standard rectification in isolated flyback or forward converters delivering 24–48V/2–3A outputs. IC Role / Device Role / Timing Role: Power rectifier converting high-frequency AC from transformer secondary into regulated DC output. Use Value: 1.03V V_F at 3A reduces conduction loss vs. higher-V_F alternatives, improving efficiency by ~0.8% at full load.	Use Scenario: Input bridge or freewheeling rectification in 3-phase or single-phase inverters for motor drives or UPS systems. IC Role / Device Role / Timing Role: Unidirectional current path enabling DC bus charging and reactive energy return during switching transitions. Use Value: 600V V_RRM and 50A I_FSM support 400V AC mains-derived DC links with margin for voltage spikes.
Industrial AC-DC Adapter	LED Driver Primary-Side Clamping
Use Scenario: Compact wall-adapters and open-frame PSUs for industrial control panels requiring 12–24V/3A outputs. IC Role / Device Role / Timing Role: Main output rectifier handling continuous 3A load with minimal thermal rise on standard FR4 PCB. Use Value: R_θJL = 14°C/W enables thermal dissipation directly into copper pour, eliminating discrete heatsinks.	Use Scenario: Snubber or clamp diode across MOSFETs or transformers in constant-current LED drivers operating at 50–100kHz. IC Role / Device Role / Timing Role: Transient voltage clamp limiting inductive kickback during switch turn-off. Use Value: 14pF junction capacitance minimizes capacitive loading on gate drive circuits while sustaining 600V clamping.

DC-DC Converter Output Rectification

Switching Inverter Input Stage

Use Scenario: Secondary-side synchronous or standard rectification in isolated flyback or forward converters delivering 24–48V/2–3A outputs.

IC Role / Device Role / Timing Role: Power rectifier converting high-frequency AC from transformer secondary into regulated DC output.

Use Value: 1.03V V_F at 3A reduces conduction loss vs. higher-V_F alternatives, improving efficiency by ~0.8% at full load.

Use Scenario: Input bridge or freewheeling rectification in 3-phase or single-phase inverters for motor drives or UPS systems.

IC Role / Device Role / Timing Role: Unidirectional current path enabling DC bus charging and reactive energy return during switching transitions.

Use Value: 600V V_RRM and 50A I_FSM support 400V AC mains-derived DC links with margin for voltage spikes.

Industrial AC-DC Adapter

LED Driver Primary-Side Clamping

Use Scenario: Compact wall-adapters and open-frame PSUs for industrial control panels requiring 12–24V/3A outputs.

IC Role / Device Role / Timing Role: Main output rectifier handling continuous 3A load with minimal thermal rise on standard FR4 PCB.

Use Value: R_θJL = 14°C/W enables thermal dissipation directly into copper pour, eliminating discrete heatsinks.

Use Scenario: Snubber or clamp diode across MOSFETs or transformers in constant-current LED drivers operating at 50–100kHz.

IC Role / Device Role / Timing Role: Transient voltage clamp limiting inductive kickback during switch turn-off.

Use Value: 14pF junction capacitance minimizes capacitive loading on gate drive circuits while sustaining 600V clamping.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH3L06S	Same 3A/600V rating; VF = 1.15V @ 3A; R_θJA = 80°C/W; TO-277 package	Higher thermal resistance requires larger copper area; TO-277 footprint differs from SOD-128	Select when legacy TO-277 layout exists or higher surge immunity (I_FSM = 75A) is prioritized
MBR360FCT	3A/60V Schottky; VF = 0.72V @ 3A; no reverse recovery; not rated for 600V	Only suitable for low-voltage outputs (<48V); cannot replace in 400V+ DC link positions	Select only for secondary-side low-V_F rectification where V_RRM ≤ 60V suffices

Compared with STTH3L06S and MBR360FCT, the S3JFS offers optimal balance of 600V capability, low-profile SOD-128 packaging, and thermally efficient R_θJL = 14°C/W - making it preferred for space-constrained, medium-voltage industrial power supplies where standard recovery performance is acceptable.

Availability

S3JFS is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial AC-DC adapters requiring stable component supply, RoHS-compliant manufacturing, and MSL Level 1 reflow readiness.

Supply support for S3JFS 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 S3JFS belongs to TSC's standard rectifier diode product line, engineered for cost-effective, high-reliability power conversion in mainstream switching power supplies and motor control systems.

FAQ

What is the maximum junction temperature rating for the S3JFS?

The S3JFS has a maximum junction temperature (T_J) of +150°C, verified per absolute maximum ratings in the official datasheet. This rating allows sustained operation in high-ambient environments such as enclosed industrial power supplies. Derating curves confirm usable current capacity down to 0A at 150°C ambient when mounted on a 5mm × 5mm Cu pad. The S3JFS must not exceed this limit to ensure long-term reliability.

Does the S3JFS have a specified reverse recovery time (t_rr)?

No, the S3JFS datasheet does not specify reverse recovery time (t_rr) because it is a standard recovery rectifier - not optimized for fast switching. Its behavior follows conventional PN-junction recovery characteristics. For applications requiring t_rr < 100ns, a fast recovery or ultrafast rectifier (e.g., S3JF, STTH3L06S) should be evaluated instead. The S3JFS remains appropriate for ≤100kHz switching frequencies where soft recovery is acceptable.

What is the marking code on the S3JFS device body?

The S3JFS is laser-marked with "S3JFS" on the top surface of the SOD-128 package, per ordering information and marking diagram in the official datasheet. This marking is unambiguous and matches the orderable part number exactly - no suffixes, date codes, or factory identifiers appear in the primary device marking. The cathode band is located adjacent to the marking for polarity identification.

Is the S3JFS suitable for use in automotive applications?

The S3JFS is not qualified to AEC-Q101 or automotive-grade reliability standards. While its 150°C T_J max and JESD201 Class 2 whisker resistance support harsh environments, Taiwan Semiconductor explicitly states these devices are "not designed for use in medical, life-saving, or life-sustaining applications." For automotive power systems, AEC-Q101-certified alternatives must be selected. The S3JFS remains appropriate for industrial and commercial equipment.

What is the recommended PCB pad layout for the S3JFS in SOD-128 package?

The datasheet provides a suggested pad layout based on JEDEC DO-221AD: 2.30–2.70 mm length, 1.60–1.90 mm width, and 0.40–0.80 mm spacing between pads. Thermal relief is advised for the cathode pad due to its role as primary heat path. A 5mm × 5mm copper pour connected via multiple vias improves R_θJA performance. The S3JFS layout must maintain ≥0.13 mm clearance to adjacent traces per creepage requirements at 600V.

S3JFS Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: SOD-128

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 600 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 3 A

Speed:: Standard Recovery >500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 1 µA @ 600 V

Capacitance @ Vr, F:: 14pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-128

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

S3JFS FAQ

1.How can I place an order for S3JFS through Aetrix?

Please submit a Request for Quotation (RFQ) for S3JFS 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 S3JFS reliable?

The price and inventory of S3JFS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S3JFS is usually 5 days.

3.What payment methods are accepted for S3JFS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S3JFS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S3JFS?

S3JFS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S3JFS 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 S3JFS?

For technical support, including S3JFS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S3JFS requirements.

6.How does Aetrix verify that S3JFS is sourced from the original manufacturer or authorized distributors?

All S3JFS 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 S3JFS meets industry standards.

7.What is the process for return or replacement of S3JFS?

All S3JFS units undergo pre-shipment inspection (PSI). If there is an issue with S3JFS, 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 S3JFS part is unused and in its original packaging.

Return procedure for S3JFS:

1.Submit a request within 90 days.

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

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