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Diodes Incorporated S3KB-13
- Part No.:
- S3KB-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
S3KB-13.pdf
- Description:
- DIODE GEN PURP 800V 3A SMB
- Quantity:
- Payment:
- Shipping:
Inventory:5,235
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Product details
Overview
S3KB-13 from Diodes Incorporated is a 3.0A, 800V peak repetitive reverse voltage (VRRM), glass passivated surface-mount rectifier in SMB package, with 1.15V forward voltage at 3.0A, 100A non-repetitive surge capability, and 10µA reverse leakage at 25°C - used in AC/DC front-end rectification for industrial power supplies and LED drivers.
For engineers reviewing the S3KB-13 datasheet, S3KB-13 pinout, S3KB-13 application, or S3KB-13 equivalent, key selection criteria include VRRM rating, thermal resistance (10°C/W), forward voltage drop, surge robustness (100A @ 8.3ms), and RoHS-compliant lead-free plating compatibility with automated SMT assembly.
Technical Context
This device is a single-phase, silicon planar junction rectifier with glass passivation for enhanced moisture and contamination resistance. Its construction supports operation up to +150°C junction temperature and enables stable performance under repetitive surge stress in line-frequency rectification circuits.
The SMB package provides standardized thermal dissipation via PCB copper pad mounting (5.0 mm², 0.013 mm thick), and its cathode band polarity marking aligns with JEDEC-standard diode orientation for automated optical inspection and placement verification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - blocks up to 800V reverse voltage without breakdown in AC line applications. |
| IO @ TT = 75°C | 3.0 A - continuous average forward current rating when terminal temperature is held at 75°C. |
| VFM @ IF = 3.0A | 1.15 V - forward conduction loss at rated DC output current, directly impacting efficiency and thermal design. |
| IFSM (8.3ms) | 100 A - peak surge current handling for cold-start inrush or lightning-induced transients. |
| IRM @ 25°C | 10 µA - low reverse leakage ensures minimal standby power loss in high-impedance bias networks. |
| RJT | 10 °C/W - thermal resistance from junction to terminal, defining minimum PCB copper area needed for thermal management. |
| Tj, TSTG | –65°C to +150°C - wide operating range suitable for industrial and outdoor-rated power converters. |
Pinout & Package
SMB (DO-214AA) surface-mount package: molded plastic case, UL 94V-0 rated, cathode band marked on body, solderable matte tin terminals, moisture sensitivity Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for AC input or transformer secondary | Accepts alternating waveform; connects to lower-potential side during forward conduction. |
| Cathode | Output terminal for rectified DC bus | Delivers unidirectional current to filter capacitor or downstream regulator; marked with band. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Prevents surface degradation under humid or chemically aggressive environments, extending reliability in industrial enclosures. |
| Low VFM (1.15V @ 3A) | Reduces conduction losses by ~15% vs. comparable 1N4007-based designs, lowering heatsink requirements. |
| 100A IFSM rating | Withstands 120VAC cold-start surges without degradation, eliminating need for external NTC thermistors in many designs. |
| RoHS-compliant lead-free finish | Enables direct compatibility with Pb-free reflow profiles (J-STD-020C Level 1), supporting global manufacturing compliance. |
Applications
| Industrial AC/DC Power Supply | LED Driver Input Stage |
|---|---|
Use Scenario: Rectifying 120/230VAC mains input before bulk capacitor filtering in DIN-rail mounted PSUs. IC Role / Device Role / Timing Role: Primary-side uncontrolled rectifier converting AC to pulsating DC. Use Value: 800V VRRM safely handles 230VAC + 30% line tolerance and transient spikes per IEC 61000-4-5. | Use Scenario: Bridge or single-diode rectification in constant-current LED drivers for street lighting. IC Role / Device Role / Timing Role: High-reliability, low-loss rectifier in offline flyback or buck-derived topologies. Use Value: 10µA IRM minimizes standby current in always-on driver control ICs, improving no-load efficiency. |
| Automotive Auxiliary Power Module | Appliance Motor Control Board |
Use Scenario: Rectifying alternator output or battery-charger AC input in 12V/24V vehicle subsystems. IC Role / Device Role / Timing Role: Input-stage diode in isolated DC-DC converters powering infotainment or ADAS sensors. Use Value: –65°C to +150°C rating supports under-hood deployment without derating in engine bay modules. | Use Scenario: AC input rectification for universal motor speed controllers in washing machines or HVAC blowers. IC Role / Device Role / Timing Role: Half-wave or full-wave rectifier feeding triac or MOSFET gate drive circuitry. Use Value: 100A IFSM withstands locked-rotor startup currents without failure, increasing field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ES3KB-13 (Diodes Inc.) | Same VRRM (800V), IO (3.0A), and SMB package; uses epoxy passivation instead of glass. | Lower moisture resistance; not recommended for high-humidity or outdoor-rated equipment. | Select S3KB-13 where long-term environmental stability is critical. |
| SB380-E3/52 (Vishay) | 800V VRRM, 3.0A IO, but SMC package (larger footprint, lower RJT ≈ 7°C/W). | Requires more PCB area but offers better thermal performance in high-power-density layouts. | Choose SB380-E3/52 when board space allows and thermal margin is constrained. |
Compared with ES3KB-13 and SB380-E3/52, S3KB-13 uniquely balances glass passivation reliability, SMB footprint compactness, and proven surge robustness - making it optimal for cost-sensitive, environmentally demanding industrial rectification where package size and long-term stability are both critical.
Availability
S3KB-13 is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, LED driver input stages, and appliance motor control boards requiring stable component supply across multi-year production cycles.
Supply support for S3KB-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The S3x-B series belongs to Diodes' high-reliability rectifier product line, engineered specifically for ruggedized line-frequency rectification in industrial, automotive, and consumer power systems where surge immunity and thermal stability are essential.
FAQ
What is the maximum allowable junction temperature for S3KB-13?
The absolute maximum junction temperature is +150°C, as specified in the DS16005 datasheet. Operation above this limit risks irreversible degradation of the glass passivation layer and junction integrity. Thermal design must ensure TJ remains below 150°C under worst-case load, ambient, and airflow conditions.
Can S3KB-13 be used in full-wave bridge configurations?
Yes - S3KB-13 is a single diode and can be used in discrete full-wave bridge assemblies (e.g., four units). It is not a monolithic bridge IC, so external layout and matching of VFM and trr across all four devices is required for balanced conduction and thermal distribution.
Is S3KB-13 compatible with lead-free reflow soldering processes?
Yes - the part features matte tin lead-free plating and is rated for standard Pb-free reflow profiles per J-STD-020C Level 1. Peak temperatures up to 260°C are supported, and no special prebake is required due to its moisture sensitivity level.
How does the SMB package affect thermal performance compared to SMC?
The SMB package has a higher junction-to-terminal thermal resistance (10°C/W) than the SMC variant (≈7°C/W), meaning it requires larger PCB copper pads or forced airflow to maintain equivalent TJ. Derating curves in Figure 1 confirm 3.0A IO only at TT = 75°C for SMB, versus higher current capability at same terminal temperature for SMC.
S3KB-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 800 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:
- 10 µA @ 800 V
- Capacitance @ Vr, F:
- 40pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
- Operating Temperature - Junction:
- -65°C ~ 150°C
S3KB-13 FAQ
1.How can I place an order for S3KB-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for S3KB-13 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 S3KB-13 reliable?
The price and inventory of S3KB-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S3KB-13 is usually 5 days.
3.What payment methods are accepted for S3KB-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S3KB-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S3KB-13?
S3KB-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S3KB-13 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 S3KB-13?
For technical support, including S3KB-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S3KB-13 requirements.
6.How does Aetrix verify that S3KB-13 is sourced from the original manufacturer or authorized distributors?
All S3KB-13 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 S3KB-13 meets industry standards.
7.What is the process for return or replacement of S3KB-13?
All S3KB-13 units undergo pre-shipment inspection (PSI). If there is an issue with S3KB-13, 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 S3KB-13 part is unused and in its original packaging.
Return procedure for S3KB-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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