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Taiwan Semiconductor Corporation S1KB
- Part No.:
- S1KB
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
S1KB.pdf
- Description:
- DIODE GEN PURP 800V 1A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,885
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Product details
Overview
S1KB from Taiwan Semiconductor is a 1A, 800V standard surface-mount silicon rectifier diode in DO-214AA (SMB) package, featuring glass-passivated junction, low forward voltage drop (≤1.1 V at 1 A), and 30 A surge capability - used in AC/DC front-end rectification for industrial power adapters and LED drivers.
For engineers reviewing the S1KB datasheet, S1KB pinout, S1KB application, or S1KB equivalent, key selection criteria include peak reverse voltage rating (800 V), thermal resistance (30 °C/W), moisture sensitivity level (J-STD-020 Level 1), RoHS/halogen-free compliance, and SMB footprint compatibility with automated SMT assembly lines.
Technical Context
The S1KB operates as a single-die, unidirectional standard recovery rectifier with a maximum junction temperature of 150 °C and storage range from –55 °C to +150 °C. Its glass-passivated junction ensures stable reverse leakage (<5 µA at 25 °C, <50 µA at 125 °C) under rated 800 V reverse bias.
Thermal performance is defined by a junction-to-lead thermal resistance of 30 °C/W, enabling reliable operation at full 1 A DC current with appropriate PCB copper area. The device exhibits 12 pF junction capacitance at 4 V reverse bias and 1 MHz, supporting moderate-frequency switching applications up to ~100 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - Maximum repetitive peak reverse voltage; defines safe blocking capability in AC line rectification. |
| IF | 1 A - Continuous average forward current; sets steady-state power dissipation limit (≈1.1 W at VF = 1.1 V). |
| IFSM | 30 A - Non-repetitive surge current (8.3 ms half-sine); supports inrush tolerance in offline SMPS input stages. |
| RθJL | 30 °C/W - Junction-to-lead thermal resistance; determines temperature rise above lead temperature under conduction. |
| VF | ≤1.1 V @ 1 A, 25 °C - Forward voltage drop; directly impacts conduction loss and thermal design margin. |
| CJ | 12 pF @ 4 V, 1 MHz - Junction capacitance; influences high-frequency reverse recovery behavior and EMI filtering requirements. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, cathode-indicated by band, matte tin-plated leads, UL 94V-0 molding compound, 0.090 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry terminal | Connected to AC input or transformer secondary; must withstand full surge current and reverse voltage stress. |
| Cathode | Forward current exit terminal | Connected to bulk capacitor or downstream converter; polarity marking (band) prevents reverse installation in automated assembly. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable long-term reverse leakage performance and improved humidity resistance per J-STD-020 Level 1 MSL. |
| Low VF (≤1.1 V) | Reduces conduction losses in 1 A continuous rectification paths, lowering thermal load on PCB copper and heatsinking. |
| 30 A IFSM rating | Supports cold-start surges in universal-input AC/DC supplies without degradation or failure. |
| DO-214AA (SMB) footprint | Standardized 4.5 × 3.2 mm outline compatible with high-volume SMT pick-and-place and reflow profiles. |
Applications
| Industrial Power Adapters | LED Driver Input Rectification |
|---|---|
Use Scenario: Universal-input (85–265 VAC) offline adapter supplying 12–24 VDC to industrial control modules. IC Role / Device Role / Timing Role: Primary-side AC/DC rectifier converting transformer output to pulsating DC before bulk capacitor smoothing. Use Value: 800 V VRRM provides 2× safety margin over 400 V peak line voltage, ensuring reliability across global mains variations. | Use Scenario: Constant-current LED driver for street lighting operating from 220 VAC mains with high ambient temperature exposure. IC Role / Device Role / Timing Role: Input bridge rectifier (single diode in full-wave configuration) feeding PFC stage or buck converter. Use Value: 150 °C max junction temperature and 30 °C/W RθJL allow sustained operation at full load in enclosed, thermally constrained fixtures. |
| Switching Mode Power Supply (SMPS) | DC-DC Converter Input Stage |
Use Scenario: 50–100 W isolated flyback converter powering telecom interface cards in base station equipment. IC Role / Device Role / Timing Role: Secondary-side output rectifier handling continuous 1 A load current with minimal conduction loss. Use Value: ≤1.1 V forward drop reduces power loss by >10% vs. higher-VF alternatives, improving overall efficiency and thermal headroom. | Use Scenario: 24 V input DC-DC converter for factory automation sensors, fed from rectified 3-phase 400 VAC bus. IC Role / Device Role / Timing Role: Pre-regulator rectifier stepping down 560 VRMS (400 VAC × √2) to intermediate DC bus prior to buck conversion. Use Value: 560 V VR(RMS) rating matches 400 VAC system requirement, while 800 V VRRM accommodates transient overvoltages per IEC 61000-4-5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standard rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R08 | Same 1 A / 800 V rating; VF = 1.15 V (max), RθJL = 35 °C/W, DO-214AA package. | Higher forward voltage and thermal resistance reduce efficiency margin in thermally dense layouts. | Acceptable where slight efficiency penalty is tolerable and STMicroelectronics sourcing is preferred. |
| ES1J | 1 A / 600 V rating; VF = 1.7 V (max), faster recovery (~50 ns), same DO-214AA package. | Lower VRRM limits use to ≤400 VAC systems; higher VF increases conduction loss significantly. | Only suitable for lower-voltage inputs; not a drop-in replacement for 800 V designs like those requiring S1KB. |
Compared with STTH1R08 and ES1J, the S1KB offers the lowest forward voltage (≤1.1 V) and best thermal resistance (30 °C/W) among 1 A/800 V SMB rectifiers, making it optimal for efficiency- and thermal-critical industrial power supplies.
Availability
S1KB is available at Aetrix Electronics and suitable for industrial power adapters, LED driver input stages, and switching mode power supply rectification requiring stable component supply, J-STD-020 Level 1 moisture handling, and RoHS/halogen-free compliance.
Supply support for S1KB 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 S1KB belongs to TSC's S1x series of standard rectifiers - designed specifically for cost-sensitive, high-reliability AC/DC front-end applications demanding robust surge capability, low VF, and automated assembly compatibility.
FAQ
What is the peak repetitive reverse voltage rating of the S1KB?
The S1KB has a peak repetitive reverse voltage (VRRM) rating of 800 V. This value is explicitly specified in the absolute maximum ratings table for the S1KB variant within the S1AB–S1MB family. It defines the maximum instantaneous reverse voltage the diode can block repeatedly without breakdown, making the S1KB suitable for 400 VAC systems with safety margin. The S1KB datasheet confirms this rating under standard test conditions at TA = 25 °C.
Does the S1KB meet RoHS and halogen-free requirements?
Yes, the S1KB is RoHS compliant and halogen-free per IEC 61249-2-21. These environmental qualifications are explicitly stated in the FEATURES section of the official Taiwan Semiconductor documentation for the S1AB–S1MB series. The S1KB shares these certifications with all variants in the family, and its matte tin-plated leads comply with J-STD-002 solderability standards.
What is the forward voltage drop of the S1KB at rated current?
The S1KB has a maximum forward voltage drop (VF) of 1.1 V at 1 A forward current and 25 °C junction temperature. This value is specified in the ELECTRICAL SPECIFICATIONS table under "MAX" column for VF. The S1KB's low VF contributes directly to reduced conduction losses in power supply rectification circuits, especially critical in thermally constrained designs.
What package type does the S1KB use, and what are its key mechanical attributes?
The S1KB uses the DO-214AA (SMB) surface-mount package. Key mechanical attributes include a 4.5 × 3.2 mm outline, UL 94V-0 flammability-rated molding compound, matte tin-plated leads, cathode polarity indicated by a band, and a typical weight of 0.090 g. These specifications are confirmed in the MECHANICAL DATA and PACKAGE OUTLINE DIMENSIONS sections of the S1KB documentation.
Can the S1KB replace the S1JB or S1MB in a design?
No - the S1KB (800 V) is not a direct replacement for S1JB (600 V) or S1MB (1000 V) without circuit review. While all share the same DO-214AA package and 1 A rating, their VRRM values differ: S1JB = 600 V, S1KB = 800 V, S1MB = 1000 V. Substituting S1KB for S1JB may over-specify voltage margin; substituting for S1MB risks reverse breakdown under 1000 V transients. Always verify system-level voltage stresses before interchanging S1x variants.
S1KB 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):
- 800 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 1 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 5 µA @ 800 V
- Capacitance @ Vr, F:
- 12pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 150°C
S1KB FAQ
1.How can I place an order for S1KB through Aetrix?
Please submit a Request for Quotation (RFQ) for S1KB 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 S1KB reliable?
The price and inventory of S1KB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1KB is usually 5 days.
3.What payment methods are accepted for S1KB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1KB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S1KB?
S1KB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S1KB 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 S1KB?
For technical support, including S1KB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1KB requirements.
6.How does Aetrix verify that S1KB is sourced from the original manufacturer or authorized distributors?
All S1KB 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 S1KB meets industry standards.
7.What is the process for return or replacement of S1KB?
All S1KB units undergo pre-shipment inspection (PSI). If there is an issue with S1KB, 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 S1KB part is unused and in its original packaging.
Return procedure for S1KB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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