FDG6303N

onsemi FDG6303N Dual N-Channel MOSFET in SOT-363 (SC-70-6)

The onsemi FDG6303N is a compact dual N-channel MOSFET designed for space-constrained switching tasks such as load switching and level shifting. Housed in a tiny SOT-363 (SC-70-6/SuperSOT-6) package with six pins, it integrates two independent N-channel MOSFETs rated for 25 V drain-to-source voltage and 0.5 A continuous drain current per channel. This makes the FDG6303N a practical fit for low-power switching stages in handheld, battery-powered, and densely populated embedded systems where board real estate is at a premium.

Engineers, buyers, and sourcing teams will appreciate the straightforward value of the FDG6303N: two MOSFETs, one miniature footprint, and a simple path to implementing compact high-side or low-side switching blocks, simple ORing, or basic level shifting—without adding extra board area or BOM line items.

At a Glance

• Brand/Manufacturer: onsemi
• MPN: FDG6303N
• Device Type: Dual N-channel MOSFETs (two independent FETs)
• Category: MOSFETs (Dual N-Channel)
• Drain-to-Source Voltage (Vds): 25 V
• Continuous Drain Current (Id): 0.5 A per channel
• Package: SOT-363 (SC-70-6, SuperSOT-6)
• Mounting Type: Surface mount
• Pin Count: 6
• Packaging: Tape & Reel (TR)

Note: Key electrical parameters beyond Vds and Id can be application- and condition-dependent. Always consult the official onsemi datasheet for complete electrical characteristics, recommended operating conditions, and safe operating area.

Why Choose the onsemi FDG6303N?

• Two switches, one footprint: The FDG6303N places two independent N-channel MOSFETs in a single SOT-363 package, simplifying routing, saving PCB area, and reducing assembly steps compared to using two discrete devices.
• Solid low-power switch building block: With 25 V Vds and 0.5 A continuous current per channel, it covers many small-load switching needs in portable electronics, sensor modules, and general-purpose embedded designs.
• Streamlined sourcing: A single MPN addresses dual-switch requirements, easing part management and procurement for projects that need multiple small FETs on the same board.

Key Specifications

• Channel Type: N-Channel (Dual)
• Configuration: Dual independent MOSFETs
• Drain-to-Source Voltage (Vds): 25 V
• Continuous Drain Current (Id): 0.5 A per channel
• Package/Case: SOT-363 (SC-70-6, SuperSOT-6)
• Mounting Type: Surface mount
• Pin Count: 6

Not specified in datasheet (consult the official document for details):

• Rds(on) values and test conditions
• Gate threshold voltage and gate charge
• Body diode characteristics
• Dynamic performance (rise/fall times, capacitances)
• Thermal resistance and power dissipation by PCB layout conditions

Typical Applications

• Load switching for small rails and subsystems in embedded designs
• Level shifting between logic domains in low-power circuits
• Power gating for sensors, radios, and interface peripherals
• Low-side or high-side (with appropriate gate drive and topology) switching for LEDs and miniature actuators
• Compact switching stages in handhelds, wearables, and IoT nodes

These use cases benefit from the FDG6303N’s dual-device integration, enabling two channels in places where board area is tightly constrained.

Design-In Considerations

While the FDG6303N provides two independent N-channel MOSFETs in a compact outline, performance and reliability depend on correct design practices. The following implementation guidance is general in nature; always validate against your operating conditions and the official onsemi datasheet.

Gate Drive and Logic Interface

• Ensure adequate gate drive amplitude and timing for your topology and load conditions. The specific gate threshold and recommended drive levels are not specified here; refer to the datasheet for the appropriate Vgs and associated Rds(on) performance.
• For level shifting, confirm the gate-source voltage stays within absolute maximum limits. Protect gates from overshoot in fast transients with appropriate series resistance or RC snubbing where needed.

Thermal and Current Handling

• The stated 0.5 A continuous drain current per channel is a guideline; achievable current depends on ambient temperature, copper area, via stitching to inner planes, and airflow. Verify thermal constraints with worst-case load profiles.
• Consult the datasheet for package thermal resistance and safe operating area (SOA). If your design runs close to current limits, consider thermal derating.

PCB Layout Tips

• Keep high di/dt current loops small to limit ringing and EMI. Place decoupling capacitors close to the load and supply nodes as appropriate for your topology.
• Use short, wide traces for the source and drain connections to reduce parasitic inductance and resistive losses.
• For heat spreading, give the source/drain pads adequate copper. Thermal performance in SOT-363 can improve significantly with larger copper pours and multiple thermal vias if board stackup allows.

Protection and Reliability

• If switching inductive loads, use appropriate flyback or snubber networks to manage voltage spikes and protect the MOSFETs’ drain-source path.
• Observe absolute maximum ratings and ESD precautions during assembly and handling.
• Validate switching edges and ringing on the bench across temperature, lot variations, and supply tolerances.

Package and Handling

• Package: SOT-363 (SC-70-6, SuperSOT-6)
• Mounting: Surface mount; compatible with standard automated assembly and reflow processes.
• Packaging: Tape & Reel (TR) for high-throughput pick-and-place.

For reflow, moisture sensitivity level (MSL), and storage/handling specifics, consult the onsemi datasheet and any applicable packaging notes.

Lifecycle and Environmental Compliance

• Lifecycle Status: Not specified (check with onsemi or authorized distributors for current lifecycle status).
• RoHS / Environmental Compliance: Not specified in datasheet.

If your project has compliance requirements (RoHS, REACH, halogen-free), confirm with onsemi’s latest documentation or distributor compliance portals before design freeze.

Sourcing and Availability Guidance

• Manufacturer: onsemi
• Part Number: FDG6303N
• Packaging Option: Tape & Reel (TR)
• Inventory: Availability changes over time. For current lead times and stocking positions, refer to authorized onsemi distributors or franchised partners.
• Pricing: Not listed here; consult distributors or onsemi sales channels for quotes and volume pricing.

Tips for procurement:

• Consolidate dual-switch needs under the FDG6303N to reduce line items and simplify qualification.
• If your design is sensitive to any parameter (e.g., Rds(on) at a particular Vgs), ensure that spec is confirmed from the datasheet revision you are using and align it with your AQL/inspection criteria.
• Keep an approved-vendor list (AVL) updated with the exact package, tape orientation, and any special handling notes to prevent assembly issues.

Integration Scenarios

Two Independent Low-Side Switches

Use each MOSFET to switch individual loads to ground (e.g., indicator LEDs with resistors, sensor power rails, or small actuators). This leverages the dual-channel nature of the FDG6303N to control separate functions with minimal board area.

Level Shifting Between Logic Domains

In simple translation scenarios, a MOSFET can be used as a bidirectional level shifter for open-drain/open-collector style interfaces. Ensure your chosen topology and pull-up values fall within the device’s limits and verify timing margins.

Power Gating for Peripherals

Gate subsystems like sensors or radios on and off to save power. Validate inrush behavior, decoupling placement, and the MOSFET’s thermal response during turn-on transients.

What’s Not Specified Here (Check the Datasheet)

To maintain accuracy and avoid assumptions, several parameters are intentionally not reproduced in this summary. For design sign-off, consult the official datasheet for:

• Rds(on) at specified Vgs and current levels
• Gate threshold voltage (Vth) and temperature behavior
• Total gate charge (Qg) and input capacitance (Ciss)
• Body diode forward characteristics and reverse recovery
• Switching times and test circuits
• Thermal resistance (junction-to-ambient, junction-to-lead) under standard boards
• Absolute maximum ratings beyond Vds/Id and recommended operating conditions

Datasheet: https://www.onsemi.com/pub/Collateral/FDG6303N-D.PDF

Sizing Up Alternatives and Second Sources

• Direct replacements and cross-references: Not specified in datasheet. For potential alternates, use onsemi’s parametric search or reach out to authorized distributors with the exact requirements (Vds, Id, package, and any critical electrical parameters).
• When evaluating alternates, ensure pinout compatibility, package dimensions, and assembly footprint fully match, and re-run thermal and switching validation in your end application.

Frequently Asked Questions (FAQs)

• Q: What is the rated drain-to-source voltage of the onsemi FDG6303N?
  A: 25 V.

• Q: How much current can each channel handle?
  A: 0.5 A continuous drain current per channel (verify thermals and operating conditions in your design).

• Q: What package is the FDG6303N supplied in?
  A: SOT-363 (also referred to as SC-70-6 or SuperSOT-6), 6 leads.

• Q: Are the two MOSFETs inside the FDG6303N connected together?
  A: They are dual independent N-channel MOSFETs. Each channel is separate unless you design them to operate together in your circuit.

• Q: Is the device RoHS compliant?
  A: Not specified in datasheet here. Check onsemi’s latest compliance documents or distributor listings.

• Q: Is the FDG6303N recommended for high-power loads?
  A: It is suited for low-power switching stages. For higher power, consider devices with higher current capability, lower Rds(on), and larger packages with better thermal performance.

• Q: Can I use it for level shifting between logic rails?
  A: Yes, it is commonly used for level shifting. Validate the topology and gate drive within the absolute maximum ratings and consult the datasheet for detailed electrical limits.

Summary

The onsemi FDG6303N is a practical, space-saving dual N-channel MOSFET for compact switching applications. With 25 V Vds and 0.5 A continuous Id per channel in a SOT-363 (SC-70-6) package, it addresses the needs of designers building low-power switching stages, level shifters, and compact power gating. Its dual independent channels reduce board space and part count, simplifying both layout and sourcing.

For complete electrical specifications, thermal data, and application guidance, refer to the official onsemi datasheet. Coordinate with authorized distributors for up-to-date availability and pricing, and confirm lifecycle and environmental compliance as part of your design control and sourcing process.