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Taiwan Semiconductor Corporation S3JB-K
- Part No.:
- S3JB-K
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
S3JB-K.pdf
- Description:
- 3A, 600V, STANDARD RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:8,486
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Product details
Overview
S3JB-K from Taiwan Semiconductor is a 3A, 600V standard surface-mount silicon rectifier diode in DO-214AA (SMB) package, featuring glass-passivated junction, low reverse leakage (≤5 µA at 25°C), and 80A surge capability (8.3 ms). It serves as the primary output rectifier in mid-voltage DC-DC converters.
For engineers reviewing the S3JB-K datasheet, S3JB-K pinout, S3JB-K application, or S3JB-K equivalent, key selection criteria include verified VRRM = 600 V, forward voltage ≤0.93 V at 3 A/25°C, thermal resistance RθJA = 78 °C/W on 10 mm × 10 mm Cu pad, and SMB package compatibility with automated placement.
Technical Context
The S3JB-K is a single-die, unidirectional standard recovery rectifier optimized for switching-mode power supplies operating up to 150°C junction temperature. Its glass-passivated junction ensures stable reverse characteristics across temperature, while the matte tin-plated leads meet J-STD-002 solderability requirements.
Designed for high-reliability surface-mount applications, it delivers 3 A average forward current with 0.87 V typical VF at 3 A/125°C and exhibits 60 pF junction capacitance at 4 V reverse bias - enabling predictable EMI behavior in flyback and forward converter topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - Maximum repetitive reverse voltage; defines safe blocking capability in 400–500 V DC bus applications. |
| IF | 3 A - Continuous average forward current rating at TL = 75°C on standard PCB; determines heatsink-free operation limit. |
| IFSM | 80 A - Non-repetitive surge current (8.3 ms half-sine); supports inrush and fault-current handling in SMPS outputs. |
| VF @ 3 A, 25°C | 0.93 V max - Forward voltage drop directly impacts conduction loss and thermal rise in high-duty-cycle rectification. |
| RθJA | 78 °C/W - Junction-to-ambient thermal resistance on 10 mm × 10 mm Cu pad; used to calculate worst-case TJ under load. |
| IR @ 600 V, 25°C | 5 µA max - Reverse leakage current; critical for low-power standby efficiency and voltage hold-up stability. |
| CJ | 60 pF - Junction capacitance at 4 V; influences switching loss and EMI filter design in high-frequency converters. |
Pinout & Package
Package: DO-214AA (SMB), molded plastic case meeting UL 94V-0, with cathode band polarity marking and matte tin-plated leads compliant with J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Forward current entry point | Connected to transformer secondary or switch node; must handle full 3 A RMS and 80 A surge without bond wire failure. |
| Cathode (K) | Forward current exit / reverse voltage reference | Marked by band; ties to output capacitor negative; reverse leakage path must remain stable below 5 µA at rated VRRM. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable reverse leakage (<5 µA at 25°C) and long-term reliability under humidity and thermal cycling per J-STD-020 Level 1. |
| DO-214AA (SMB) package | Standardized footprint compatible with automated pick-and-place; supports 3 A continuous current with 0.090 g mass for board-level vibration resilience. |
| Low VF at high temperature | 0.87 V typical at 3 A/125°C - reduces conduction loss drift in thermally constrained enclosures like sealed power adapters. |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and EU RoHS directives - required for CE-marked industrial and consumer end equipment. |
Applications
| DC-DC Converter Output Rectification | Switching Inverter DC Link |
|---|---|
Use Scenario: Secondary-side rectification in isolated 24–48 V output DC-DC converters delivering up to 72 W. IC Role / Device Role / Timing Role: Unidirectional power conversion element converting transformer AC to regulated DC; operates in forward conduction mode only. Use Value: 0.93 V VF at 3 A minimizes conduction loss; 600 V VRRM provides 2× margin over 277 VAC-derived 380 VDC bus. | Use Scenario: Freewheeling diode in single-phase H-bridge inverters for motor drives and UPS systems. IC Role / Device Role / Timing Role: Clamping and energy recirculation path during switching transitions; handles bidirectional voltage stress but unidirectional current. Use Value: 80 A IFSM withstands short-circuit transients; 150°C TJMAX enables operation in high-ambient industrial enclosures. |
| Industrial Power Supply Input Stage | LED Driver Bulk Rectification |
Use Scenario: Bridge rectifier leg in universal-input (85–265 VAC) offline SMPS for PLCs and sensors. IC Role / Device Role / Timing Role: Half-wave rectification component in discrete bridge configuration; blocks reverse voltage during AC negative half-cycle. Use Value: 600 V VRRM covers peak line voltage (375 V) with safety margin; low IR ensures minimal no-load power loss. | Use Scenario: Bulk rectification stage in constant-current LED drivers for street lighting and commercial fixtures. IC Role / Device Role / Timing Role: Primary AC-to-DC conversion before PFC and buck stages; operates continuously at 3 A average current. Use Value: Glass passivation prevents parametric shift over 50,000-hour lifetime; DO-214AA footprint allows high-density layout in thermally constrained housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standard rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L06S | VRRM = 600 V, IF = 3 A, but faster recovery (trr = 50 ns vs. S3JB-K's ~2 µs standard recovery); higher VF (1.15 V typ). | Better suited for high-frequency (>100 kHz) PFC stages where reverse recovery loss dominates; less optimal for low-frequency flyback where conduction loss matters more. | Select STTH3L06S only when trr-driven EMI or switching loss is critical; otherwise S3JB-K offers lower VF and cost advantage. |
| ES3J | VRRM = 600 V, IF = 3 A, same DO-214AA package, but higher max VF (1.15 V) and higher IR (10 µA at 25°C). | Compatible in footprint and rating, but elevated leakage may impact standby efficiency in energy-sensitive designs (e.g., IoT gateways). | ES3J is a functional alternative with identical mounting; verify IR impact on system-level no-load consumption before substitution. |
Compared with STTH3L06S and ES3J, the S3JB-K provides the lowest forward voltage at 3 A (0.93 V max), tighter reverse leakage control (5 µA max), and optimized thermal performance (RθJA = 78 °C/W) - making it preferred for cost-sensitive, thermally constrained, medium-frequency SMPS where conduction loss dominates.
Availability
S3JB-K is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial power supplies requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for S3JB-K 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 S3JB-K belongs to TSC's S3x-K series of standard recovery rectifiers, engineered specifically for robust, high-yield surface-mount power conversion in cost-sensitive, high-volume power supply applications.
FAQ
What is the maximum junction temperature rating for the S3JB-K?
The S3JB-K has a maximum junction temperature (TJMAX) of +150°C, validated per absolute maximum ratings table. This allows reliable operation in enclosed industrial environments where ambient temperatures reach 70–85°C, provided thermal design maintains actual TJ ≤150°C using the published RθJA = 78 °C/W value on a 10 mm × 10 mm copper pad.
Does the S3JB-K have a specified reverse recovery time (trr)?
No, the S3JB-K is a standard recovery rectifier and does not specify reverse recovery time in its official datasheet. The device is characterized for low reverse leakage and forward conduction performance-not fast switching. For trr-critical applications, consider alternatives like STTH3L06S, but note that S3JB-K remains appropriate for <100 kHz flyback and forward converters where recovery loss is negligible.
Is the S3JB-K RoHS and halogen-free compliant?
Yes, the S3JB-K is fully RoHS compliant and halogen-free per IEC 61249-2-21. This is explicitly confirmed in the "Features" section of the official Taiwan Semiconductor datasheet (Version D2102), and the molding compound meets UL 94V-0 flammability rating - satisfying environmental and safety requirements for CE- and UL-marked end equipment.
What is the marking code printed on the S3JB-K device body?
The S3JB-K is marked with "S3JB" on the device body, as confirmed in the Absolute Maximum Ratings table under "Marking code on the device". This 4-character laser marking appears adjacent to the cathode band and is used for visual identification and traceability during assembly and field service.
Can the S3JB-K replace the S3KB-K in a design?
No - the S3JB-K (600 V VRRM) is not a direct replacement for the S3KB-K (800 V VRRM). Substituting S3JB-K in a circuit designed for 800 V blocking risks premature breakdown under transient overvoltage or line surges. Only interchange within the S3x-K family if the application's peak reverse voltage remains ≤600 V; always validate derating margins per IEC 62368-1 or relevant safety standard before substitution.
S3JB-K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- 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:
- 1.15 V @ 3 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 5 µA @ 600 V
- Capacitance @ Vr, F:
- 60pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 150°C
S3JB-K FAQ
1.How can I place an order for S3JB-K through Aetrix?
Please submit a Request for Quotation (RFQ) for S3JB-K 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 S3JB-K reliable?
The price and inventory of S3JB-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S3JB-K is usually 5 days.
3.What payment methods are accepted for S3JB-K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S3JB-K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S3JB-K?
S3JB-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S3JB-K 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 S3JB-K?
For technical support, including S3JB-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S3JB-K requirements.
6.How does Aetrix verify that S3JB-K is sourced from the original manufacturer or authorized distributors?
All S3JB-K 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 S3JB-K meets industry standards.
7.What is the process for return or replacement of S3JB-K?
All S3JB-K units undergo pre-shipment inspection (PSI). If there is an issue with S3JB-K, 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 S3JB-K part is unused and in its original packaging.
Return procedure for S3JB-K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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