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Diodes Incorporated S3AB-13
- Part No.:
- S3AB-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
S3AB-13.pdf
- Description:
- DIODE GEN PURP 50V 3A SMB
- Quantity:
- Payment:
- Shipping:
Inventory:9,313
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Product details
Overview
S3AB-13 from Diodes Incorporated is a 50 V peak repetitive reverse voltage, 3.0 A average rectified surface-mount glass passivated diode in SMB package, featuring 1.15 V forward voltage at 3.0 A, 100 A non-repetitive surge capability, and RoHS-compliant matte tin plating-used in AC/DC front-end rectification for industrial power supplies.
For engineers reviewing the S3AB-13 datasheet, S3AB-13 pinout, S3AB-13 application, or S3AB-13 equivalent, key selection criteria include VRRM = 50 V, IO = 3.0 A @ TT = 75°C, thermal resistance RJT = 10 °C/W, and SMB package compatibility with automated SMT assembly.
Technical Context
This device is a single-phase, half-wave silicon rectifier optimized for resistive or inductive loads at 60 Hz. Its glass passivated die construction ensures stable reverse leakage (IRM ≤ 10 µA @ 25°C, ≤ 250 µA @ 125°C) and robust surge tolerance (IFSM = 100 A, 8.3 ms sine wave).
The SMB package provides defined thermal performance: junction-to-terminal resistance of 10 °C/W when mounted on a 5.0 mm² copper pad. Capacitance is low (CT = 40 pF @ 1 MHz, 4 V reverse), supporting moderate-frequency rectification without excessive switching loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum peak reverse voltage before breakdown; sets safe operating limit for 35 V RMS input applications. |
| IO | 3.0 A @ TT = 75°C - Continuous DC output current rating under standard heatsinking; derates to ~1.5 A at 125°C terminal temp. |
| VFM | 1.15 V @ IF = 3.0 A - Forward conduction loss directly impacts efficiency and thermal rise in linear rectifier stages. |
| IFSM | 100 A - Surge withstand for 8.3 ms half-sine; enables reliable operation during cold-start inrush or line transients. |
| RJT | 10 °C/W - Junction-to-terminal thermal resistance measured on 5.0 mm² copper pad; defines minimum PCB copper area needed for thermal management. |
| CT | 40 pF @ 1 MHz, 4 V - Low junction capacitance minimizes displacement current and EMI in 50/60 Hz rectifiers. |
Pinout & Package
SMB (DO-214AA) surface-mount package: molded plastic case, UL 94V-0 rated, cathode marked by band or notch, solderable matte tin terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to AC source or transformer secondary; must handle full load current and surge without trace overheating. |
| Cathode | Current exit point during forward conduction | Connected to bulk capacitor or downstream regulator; polarity marking ensures correct orientation in automated placement. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Enables stable IR leakage over temperature and humidity; eliminates need for conformal coating in industrial environments. |
| Low VF (1.15 V) | Reduces conduction loss by ~15% vs. standard 1N540x diodes at 3 A, lowering thermal stress in compact power supplies. |
| 100 A IFSM | Withstands 10× rated current surge, eliminating need for external NTC thermistors in many AC-input designs. |
| RoHS-compliant matte tin finish | Ensures lead-free solder compatibility and long-term intermetallic stability per JEDEC J-STD-020C Level 1 moisture sensitivity. |
Applications
| AC/DC Power Adapter | Industrial Motor Control Board |
|---|---|
Use Scenario: 24 VAC input rectification feeding 3000 µF bulk capacitor in wall-mounted power adapter. IC Role / Device Role / Timing Role: Primary-side uncontrolled rectifier converting AC to pulsating DC. Use Value: 1.15 V VF limits power loss to <1.5 W at 3 A, enabling natural convection cooling without heatsink. | Use Scenario: Rectifying 48 VAC control signal for PLC I/O module power rail. IC Role / Device Role / Timing Role: Half-wave rectifier supplying isolated logic supply in motor drive auxiliary circuitry. Use Value: 50 V VRRM provides 2× safety margin over 48 VAC peak (67.9 V), ensuring reliability under line swell conditions. |
| LED Driver Input Stage | Embedded System Power Sequencing |
Use Scenario: Bridge input rectification (as one leg) in constant-current LED driver with 120 VAC input. IC Role / Device Role / Timing Role: High-surge-capable rectifier handling lamp cold-start inrush. Use Value: 100 A IFSM accommodates 5× nominal current surges during LED string turn-on without degradation. | Use Scenario: Standby power rectification for microcontroller reset supervisor IC requiring clean 3.3 V rail. IC Role / Device Role / Timing Role: Low-leakage rectifier isolating auxiliary AC sensing path from main system ground. Use Value: 10 µA IRM at 25°C prevents false wake-up events caused by reverse leakage coupling into sensitive analog inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB350-E3/5BT | VRRM = 50 V, IO = 3.0 A, but in SMA package (smaller footprint, higher RJT = 15 °C/W) | Limited thermal headroom in high-ambient environments; unsuitable where SMB's 10 °C/W is required for passive cooling. | Select when board space is constrained and thermal load is <2 W. |
| 1N5822RLG | Same SMB package, but Schottky (VF ≈ 0.9 V), lower VRRM = 40 V, higher IRM = 500 µA @ 125°C | Not suitable for 50 V blocking; preferred only where ultra-low VF outweighs reverse leakage concerns. | Select only if input peak voltage ≤ 28 V and leakage >250 µA at 125°C is acceptable. |
Compared with SB350-E3/5BT and 1N5822RLG, S3AB-13 delivers optimal balance of 50 V blocking margin, 3.0 A continuous current, and SMB thermal performance-making it preferred for industrial 24–48 VAC-fed power supplies where reliability and thermal headroom are critical.
Availability
S3AB-13 is available at Aetrix Electronics and suitable for AC/DC power adapters, industrial motor control boards, LED driver input stages, and embedded system power sequencing requiring stable component supply across multi-year production cycles.
Supply support for S3AB-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 centers across Asia and manufacturing in China, Taiwan, and the US.
The S3A/B–S3M/B series targets cost-sensitive, high-volume rectification applications in industrial, consumer, and computing power supplies-designed for robustness, automated assembly, and RoHS compliance without performance trade-offs.
FAQ
What is the maximum allowable junction temperature for S3AB-13?
The S3AB-13 has an operating junction temperature range of –65°C to +150°C. Its rated 3.0 A average output current assumes terminal temperature (TT) ≤ 75°C with specified PCB copper heatsinking. Exceeding this terminal temperature requires derating per Figure 1 in DS16005.
Is S3AB-13 suitable for capacitive-load applications?
No-capacitive loads require 20% current derating per the datasheet. At full 3.0 A rating, the device is validated only for resistive or inductive loads. For capacitor-input filters, maximum continuous current must be reduced to 2.4 A to maintain reliability and thermal safety.
Does S3AB-13 have a lead-free and RoHS-compliant version?
Yes-the standard S3AB-13 is RoHS-compliant per EU Directive Annex Notes 5 and 7, with matte tin finish and exemptions for high-temperature solder and glass. The "-F" suffix (e.g., S3AB-13-F) explicitly denotes the lead-free variant, though both share identical electrical and mechanical specs.
How does the SMB package of S3AB-13 compare thermally to SMC?
The SMB package has RJT = 10 °C/W (vs. SMC's ~7 °C/W), due to smaller copper pad area and lower mass. This means SMB requires careful PCB layout-minimum 5.0 mm² copper pad-to achieve rated 3.0 A current; SMC allows higher current or higher ambient operation under identical layout.
S3AB-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):
- 50 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 @ 50 V
- Capacitance @ Vr, F:
- 40pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
- Operating Temperature - Junction:
- -65°C ~ 150°C
S3AB-13 FAQ
1.How can I place an order for S3AB-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for S3AB-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 S3AB-13 reliable?
The price and inventory of S3AB-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S3AB-13 is usually 5 days.
3.What payment methods are accepted for S3AB-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S3AB-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S3AB-13?
S3AB-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S3AB-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 S3AB-13?
For technical support, including S3AB-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S3AB-13 requirements.
6.How does Aetrix verify that S3AB-13 is sourced from the original manufacturer or authorized distributors?
All S3AB-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 S3AB-13 meets industry standards.
7.What is the process for return or replacement of S3AB-13?
All S3AB-13 units undergo pre-shipment inspection (PSI). If there is an issue with S3AB-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 S3AB-13 part is unused and in its original packaging.
Return procedure for S3AB-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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