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

Taiwan Semiconductor Corporation S2JFS

Name: S2JFS
Brand: Taiwan Semiconductor Corporation
SKU: S2JFS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S2JFS

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-128

Datasheet:: S2JFS.pdf

Description:: DIODE GEN PURP 600V 2A SOD128

Quantity:: RFQ Add To RFQ list

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Inventory:1,700

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Product details

Overview

S2JFS from Taiwan Semiconductor is a 600 V, 2 A standard surface-mount silicon rectifier diode in SOD-128 package, featuring glass-passivated junction, 50 A surge rating (8.3 ms), and 150 °C max junction temperature; used in DC-DC converters and switching-mode inverters.

For engineers reviewing the S2JFS datasheet, S2JFS pinout, S2JFS application, or S2JFS equivalent, key selection criteria include repetitive peak reverse voltage (600 V), forward voltage at 2 A (0.98 V typ @ 25 °C), thermal resistance (R_θJL = 14 °C/W), reverse leakage (≤1 µA @ 25 °C), and SOD-128 mechanical compatibility with automated placement.

Technical Context

The S2JFS is a single-die, standard recovery rectifier optimized for general-purpose switching power conversion. Its glass-passivated junction ensures stable performance under humidity and thermal cycling, while the SOD-128 package provides low thermal resistance to lead (14 °C/W) and supports high-current handling up to 2 A average forward current.

Electrical behavior is defined by fixed V_RRM = 600 V, I_F = 2 A, I_FSM = 50 A (8.3 ms), and reverse leakage ≤1 µA at 25 °C - all verified per JESD201 Class 2 whisker testing and RoHS/halogen-free compliance per IEC 61249-2-21.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	600 V - maximum repetitive reverse blocking voltage; defines safe operating limit in flyback or boost converter output stages
I_F	2 A - continuous average forward current at T_L = 75 °C on 5 mm × 5 mm Cu pad; sets baseline conduction capability
I_FSM	50 A (8.3 ms) - non-repetitive surge current rating; determines robustness against line transients or startup inrush
V_F	0.98 V max @ 2 A, 25 °C - forward voltage drop directly impacts conduction loss and thermal design margin
R_θJL	14 °C/W - junction-to-lead thermal resistance; enables accurate thermal modeling when mounted on PCB copper pads
I_R	≤1 µA @ 600 V, 25 °C - reverse leakage current; critical for low-power standby efficiency and voltage hold-up integrity

Pinout & Package

Package: SOD-128 - surface-mount, single-anode/single-cathode configuration with cathode band marking; matte tin-plated leads, UL 94V-0 molding compound, 0.027 g weight.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side of circuit (e.g., transformer secondary center-tap or switch node)
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	Ensures long-term reliability under humid environments and repeated thermal cycling without degradation
J-STD-020 Level 1 moisture sensitivity	Enables direct placement without baking; eliminates pre-reflow moisture mitigation steps
RoHS and halogen-free compliance	Meets IEC 61249-2-21 and EU directives for environmentally constrained industrial and consumer applications
150 °C maximum junction temperature	Supports operation in high-ambient environments such as enclosed power supplies or automotive under-hood modules

Applications

DC-DC Converter Output Rectification	Switching Mode Inverter Output Stage
Use Scenario: High-efficiency isolated DC-DC converter delivering 12 V/2 A from 48 V input using flyback topology. IC Role / Device Role / Timing Role: Output rectifier conducting during transformer demagnetization phase; handles continuous 2 A load with minimal conduction loss. Use Value: 0.98 V V_F at 2 A reduces power loss to <1.96 W, easing thermal management on compact PCB layouts.	Use Scenario: Single-phase H-bridge inverter converting 350 V DC bus to 230 V AC for HVAC fan control. IC Role / Device Role / Timing Role: Freewheeling diode across each IGBT leg, clamping inductive kickback during switching transitions. Use Value: 600 V V_RRM provides 25% voltage margin over 350 V bus, ensuring reliable blocking during transient overvoltage events.
Industrial Power Supply Input Bridge	LED Driver Secondary-Side Rectification
Use Scenario: 100 W industrial AC-DC front-end using discrete bridge rectifier with 230 V AC input. IC Role / Device Role / Timing Role: One leg of full-wave bridge; conducts half-sine current at 2 A average with 50 A surge tolerance. Use Value: 50 A I_FSM withstands cold-start surges and line dips without failure, improving system MTBF.	Use Scenario: Constant-current LED driver for street lighting, stepping down 400 V DC to 36 V for 1 A LED string. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier replacement in quasi-resonant flyback, operating at 65 kHz. Use Value: 12 pF junction capacitance minimizes switching loss and EMI generation at high-frequency operation.

DC-DC Converter Output Rectification

Switching Mode Inverter Output Stage

Use Scenario: High-efficiency isolated DC-DC converter delivering 12 V/2 A from 48 V input using flyback topology.

IC Role / Device Role / Timing Role: Output rectifier conducting during transformer demagnetization phase; handles continuous 2 A load with minimal conduction loss.

Use Value: 0.98 V V_F at 2 A reduces power loss to <1.96 W, easing thermal management on compact PCB layouts.

Use Scenario: Single-phase H-bridge inverter converting 350 V DC bus to 230 V AC for HVAC fan control.

IC Role / Device Role / Timing Role: Freewheeling diode across each IGBT leg, clamping inductive kickback during switching transitions.

Use Value: 600 V V_RRM provides 25% voltage margin over 350 V bus, ensuring reliable blocking during transient overvoltage events.

Industrial Power Supply Input Bridge

LED Driver Secondary-Side Rectification

Use Scenario: 100 W industrial AC-DC front-end using discrete bridge rectifier with 230 V AC input.

IC Role / Device Role / Timing Role: One leg of full-wave bridge; conducts half-sine current at 2 A average with 50 A surge tolerance.

Use Value: 50 A I_FSM withstands cold-start surges and line dips without failure, improving system MTBF.

Use Scenario: Constant-current LED driver for street lighting, stepping down 400 V DC to 36 V for 1 A LED string.

IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier replacement in quasi-resonant flyback, operating at 65 kHz.

Use Value: 12 pF junction capacitance minimizes switching loss and EMI generation at high-frequency operation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH2R06	Same V_RRM (600 V), same I_F (2 A), but TO-220AC package; higher R_θJA (50 °C/W vs. 74 °C/W for S2JFS on PCB)	Requires heatsink for >1 A continuous use; unsuitable for ultra-thin or space-constrained designs	Choose STTH2R06 only when through-hole mounting and thermal derating flexibility are required
ES2J	Same SOD-128 package and V_RRM (600 V), but faster recovery (t_rr ≈ 35 ns vs. ~2 µs for S2JFS); higher V_F (1.15 V @ 2 A)	Better suited for high-frequency SMPS (>100 kHz); increased conduction loss reduces efficiency at low frequency	Choose ES2J where switching speed dominates over conduction loss, e.g., PFC boost diodes

Compared with STTH2R06 and ES2J, the S2JFS delivers optimal balance of low-profile SMD integration, low forward drop, and robust surge capability - making it preferred for cost-sensitive, thermally constrained 50–100 kHz DC-DC and inverter applications where standard recovery suffices.

Availability

S2JFS is available at Aetrix Electronics and suitable for DC-DC converters, switching-mode inverters, and industrial power supplies requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for S2JFS 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, MOSFETs, and bipolar transistors.

The S2JFS belongs to TSC's S2xFS family of standard surface-mount rectifiers designed specifically for cost-effective, high-reliability power conversion in industrial, computing, and consumer power supplies.

FAQ

What is the maximum repetitive peak reverse voltage rating for S2JFS?

The S2JFS has a maximum repetitive peak reverse voltage (V_RRM) of 600 V, as specified in the absolute maximum ratings table of the official Taiwan Semiconductor datasheet (Version B2103). This rating defines the highest reverse voltage the device can block repeatedly without breakdown under normal operating conditions and must not be exceeded in circuit design.

What is the forward voltage drop of S2JFS at 2 A and 25 °C?

The forward voltage drop (V_F) of the S2JFS is 0.98 V maximum at 2 A forward current and 25 °C junction temperature, with a typical value of 0.91 V at 1 A. This parameter is measured under pulsed conditions (PW = 0.3 ms) and directly impacts conduction losses and thermal design in power supply output stages.

Is S2JFS compatible with lead-free reflow soldering processes?

Yes, the S2JFS features matte tin-plated leads compliant with J-STD-002 for solderability and is rated for lead-free reflow profiles. Its moisture sensitivity level is J-STD-020 Level 1, meaning it can be placed directly onto PCBs without baking prior to reflow, supporting standard high-volume SMT assembly lines.

What package type does S2JFS use, and what are its key mechanical attributes?

The S2JFS uses the SOD-128 surface-mount package: a compact, flat-lead outline with cathode band marking, UL 94V-0 flammability-rated molding compound, and 0.027 g typical weight. It is designed for automated placement and meets JESD201 Class 2 whisker resistance, enabling reliable long-term solder joint integrity.

How does the thermal performance of S2JFS compare between junction-to-lead and junction-to-ambient?

The S2JFS has a junction-to-lead thermal resistance (R_θJL) of 14 °C/W and a junction-to-ambient resistance (R_θJA) of 74 °C/W when mounted on a 5 mm × 5 mm copper pad. This indicates that heat transfer to the PCB copper is highly efficient, while ambient dissipation depends heavily on board layout - underscoring the importance of adequate copper area for thermal management of the S2JFS.

S2JFS 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):: 2A

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 2 A

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

Reverse Recovery Time (trr):: -

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

Capacitance @ Vr, F:: 12pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-128

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

S2JFS FAQ

1.How can I place an order for S2JFS through Aetrix?

Please submit a Request for Quotation (RFQ) for S2JFS 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 S2JFS reliable?

The price and inventory of S2JFS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S2JFS is usually 5 days.

3.What payment methods are accepted for S2JFS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S2JFS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S2JFS?

S2JFS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S2JFS 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 S2JFS?

For technical support, including S2JFS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S2JFS requirements.

6.How does Aetrix verify that S2JFS is sourced from the original manufacturer or authorized distributors?

All S2JFS 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 S2JFS meets industry standards.

7.What is the process for return or replacement of S2JFS?

All S2JFS units undergo pre-shipment inspection (PSI). If there is an issue with S2JFS, 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 S2JFS part is unused and in its original packaging.

Return procedure for S2JFS:

1.Submit a request within 90 days.

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

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