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Diodes Incorporated SB330-B
- Part No.:
- SB330-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SB330-B.pdf
- Description:
- DIODE SCHOTTKY 30V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:9,124
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Product details
Overview
SB330-B from Diodes Incorporated is a 3.0A, 30V Schottky barrier rectifier in DO-201AD package, featuring 0.74V forward voltage at 3.0A, 80A non-repetitive surge capability, and guard ring die construction for transient protection. It is used in low-voltage, high-frequency inverters, freewheeling diode circuits, and polarity protection in DC power supplies.
For engineers reviewing the SB330-B datasheet, SB330-B pinout, SB330-B application, or SB330-B equivalent, key selection criteria include its 30V VRRM rating, 0.74V VFM at rated current, thermal resistance (RθJA = 30°C/W), DO-201AD mechanical compatibility, and RoHS-compliant tin-plated terminals.
Technical Context
This Schottky rectifier employs a planar guard ring die structure to suppress edge breakdown and improve transient robustness under repetitive surge stress. Its low forward voltage drop and fast switching recovery (<10 ns) stem from majority-carrier conduction, eliminating minority-carrier storage delay.
The device operates across –65°C to +125°C junction temperature range with RθJL = 10°C/W (junction-to-lead), enabling direct PCB trace heat sinking via axial leads. It is rated for 3.0A average forward current with derating above 75°C ambient per Figure 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - Maximum repetitive reverse voltage before avalanche; sets upper limit for DC blocking in 24V systems. |
| IF(AV) | 3.0 A - Continuous average forward current at TA = 25°C with specified lead-mount thermal conditions. |
| VFM @ 3.0A | 0.74 V - Forward voltage drop determining conduction loss (2.22W at full load) and thermal rise. |
| IFSM | 80 A - Non-repetitive peak surge current (8.3ms half-sine); supports inrush and fault-current handling. |
| IRM @ 25°C | 0.5 mA - Peak reverse leakage at rated VRRM; low leakage preserves efficiency in standby/battery modes. |
| RθJA | 30 °C/W - Junction-to-ambient thermal resistance; defines required PCB copper area for thermal management. |
Pinout & Package
Package: DO-201AD molded plastic case (UL 94V-0), axial leads, cathode band marking, 1.1 g mass, tin-plated terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground or return path) in rectification; requires low-inductance layout for high-frequency operation. |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; connects to positive rail; must withstand full VRRM during off-state and handle peak forward surge. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Suppresses edge breakdown, improving reliability under voltage transients and repeated surge stress. |
| Low forward voltage (0.74V @ 3A) | Reduces conduction loss by ~35% vs. comparable silicon rectifiers, lowering thermal load in compact designs. |
| 80A surge rating (8.3ms) | Withstands motor startup currents, capacitor charging surges, and short-circuit events without failure. |
| DO-201AD package with RθJL = 10°C/W | Enables efficient heat transfer through axial leads to PCB copper, supporting >2.5W dissipation with minimal heatsinking. |
Applications
| DC Power Supply Output Rectification | Automotive Body Control Module (BCM) Polarity Protection |
|---|---|
Use Scenario: Secondary-side rectification in 24V offline AC/DC adapters and DC-DC converters. IC Role / Device Role / Timing Role: Schottky rectifier conducting during positive half-cycle; replaces slower silicon diodes to minimize switching loss. Use Value: 0.74V VFM reduces power loss by 1.5W vs. 1.1V silicon diode at 3A, easing thermal design in enclosed enclosures. | Use Scenario: Reverse-polarity protection at 12V/24V input of automotive BCMs. IC Role / Device Role / Timing Role: Anode grounded, cathode to input rail; blocks reverse connection while passing forward current with minimal drop. Use Value: Low VFM preserves >97% of supply voltage under full load, avoiding brownout in microcontroller subsystems. |
| Freewheeling Diode in DC Motor Drivers | Low-Voltage Solar Charge Controller Input Protection |
Use Scenario: Flyback path for inductive kickback in H-bridge motor drivers (e.g., 24V BLDC gate drivers). IC Role / Device Role / Timing Role: Provides low-loss, fast-recovery path during MOSFET turn-off; clamps inductive voltage spike. Use Value: 80A IFSM handles motor stall surges; <10 ns recovery avoids cross-conduction in synchronous rectification. | Use Scenario: Reverse-current blocking between solar panel array and MPPT charge controller input. IC Role / Device Role / Timing Role: Cathode to controller input, anode to panel negative; prevents battery discharge into panel at night. Use Value: 0.5 mA IRM at 25°C minimizes nighttime parasitic drain, extending battery autonomy in off-grid systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-3EY30 | Same DO-201AD package, 30V VRRM, but VFM = 0.72V @ 3A and IFSM = 75A. | Slightly lower conduction loss but reduced surge margin; less tolerant of repeated inductive spikes. | Prefer when thermal budget is tighter and surge events are infrequent. |
| ON Semiconductor SB330-E3/54 | Identical electrical specs and DO-201AD package; RoHS-compliant tin finish, same 0.74V VFM and 80A IFSM. | No functional difference; qualified to different internal process controls and lot traceability. | Select for dual-sourcing or supply chain diversification without design change. |
Compared with VS-3EY30 and SB330-E3/54, SB330-B offers identical surge robustness and forward performance to the ON Semiconductor variant, while providing a 5A higher surge margin than Vishay's alternative-critical in motor drive and industrial power applications where transient stress is frequent.
Availability
SB330-B is available at Aetrix Electronics and suitable for DC power supply output rectification, automotive polarity protection, freewheeling diode circuits, and solar charge controller input protection requiring stable component supply and long-term manufacturability.
Supply support for SB330-B 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 and manufacturing operations across Asia and the Americas.
The SB330-B belongs to Diodes' general-purpose Schottky rectifier product line, engineered for cost-sensitive, high-efficiency power conversion in consumer, industrial, and automotive power supplies.
FAQ
What is the maximum operating junction temperature for SB330-B?
The SB330-B has a maximum junction temperature (TJ) rating of +125°C under continuous operation. This limit applies when the device is mounted on a PCB with specified thermal conditions (0.5" lead length, 2.5" × 2.5" copper pad). Exceeding this temperature risks parametric shift and accelerated degradation.
Is SB330-B suitable for surface-mount assembly?
No, SB330-B uses the axial-leaded DO-201AD package and is designed for through-hole mounting only. It lacks SMD-compatible terminations or footprint geometry. For surface-mount equivalents, consider Diodes' AP330W (SMA) or SB330D (DO-214AA), which share similar electrical specs but differ in package and thermal profile.
Does SB330-B require a heatsink in standard applications?
A dedicated heatsink is not required for SB330-B at ≤3.0A and TA ≤ 75°C, provided it is mounted with ≥2.5" × 2.5" copper pads and 0.5" lead length per datasheet Figure 1. Thermal performance relies on PCB copper area-not external heatsinks-due to its RθJL = 10°C/W lead-based conduction path.
How does the guard ring construction improve reliability?
The guard ring die structure surrounds the active junction periphery to equalize electric field distribution, preventing premature edge avalanche during reverse-bias transients. This extends operational life under repetitive surge stress (e.g., motor commutation spikes) and improves consistency in production lots versus non-guarded Schottky dies.
SB330-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 500 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 30 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -65°C ~ 125°C
SB330-B FAQ
1.How can I place an order for SB330-B through Aetrix?
Please submit a Request for Quotation (RFQ) for SB330-B 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 SB330-B reliable?
The price and inventory of SB330-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SB330-B is usually 5 days.
3.What payment methods are accepted for SB330-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SB330-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SB330-B?
SB330-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SB330-B 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 SB330-B?
For technical support, including SB330-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SB330-B requirements.
6.How does Aetrix verify that SB330-B is sourced from the original manufacturer or authorized distributors?
All SB330-B 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 SB330-B meets industry standards.
7.What is the process for return or replacement of SB330-B?
All SB330-B units undergo pre-shipment inspection (PSI). If there is an issue with SB330-B, 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 SB330-B part is unused and in its original packaging.
Return procedure for SB330-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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