CDBQR0230L-HF - 30V 200mA Schottky Diode | Comchip | 0402
MPN: CDBQR0230L-HF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.42 | $0.42 |
| 10 | $0.36 | $3.60 |
| 100 | $0.28 | $28.00 |
| 500 | $0.22 | $110.00 |
| 1,000 | $0.18 | $180.00 |
| 5,000 | $0.14 | $700.00 |
CDBQR0230L-HF Overview
A Schottky barrier diode is a semiconductor device formed by a metal-semiconductor junction rather than a PN junction, which produces a lower forward voltage drop (typically 0.3V to 0.5V vs 0.7V for a silicon diode) and faster switching speed at the expense of higher reverse leakage current. In the power management hierarchy, Schottky diodes sit under discrete semiconductors -> diodes -> rectifier diodes -> Schottky diodes -> power management components, and are widely used for low-voltage rectification, reverse polarity protection, and signal clamping.
Key features of the CDBQR0230L-HF include its ultra-small 0402 footprint (SOD-923F), which is among the smallest standard diode packages, RoHS compliance for environmental compatibility, and a low forward voltage drop that minimizes conduction losses in low-voltage circuits. The device is suitable for high-density PCB designs where board space is at a premium.
The CDBQR0230L-HF uses Schottky barrier technology with a low barrier height, enabling fast switching and low forward voltage. Its compact form factor makes it ideal for portable and wearable electronics where every square millimeter of PCB counts. The 30V reverse voltage rating provides adequate headroom for 5V and 12V rails, while the 200mA current rating suits signal-level and low-power applications.
Typical applications include reverse polarity protection in portable devices, low-voltage rectification in DC-DC converters, freewheeling diode in small switching circuits, signal clamping and OR-ing, and ESD protection augmentation in USB and battery interfaces. The 0402 footprint is well-suited for hand-held, IoT, and wearable product designs.
When designing with the CDBQR0230L-HF, ensure the thermal path is adequate. Although the 200mA current is modest, the small 0402 package has limited thermal dissipation; sustained current near the maximum rating will require attention to copper pad sizing on the PCB. The HF suffix denotes Halogen-Free, which is important for environmental compliance.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, helping engineers select the right Schottky diode for compact, low-power designs.
Drop-in alternatives for CDBQR0230L-HF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with CDBQR0230L-HF (same form factor and footprint) — differing in RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
CDBQR0230L
✅ Drop-In✓ In Stock
$0.085 / Unit
View Datasheet →RB521SM-30T2R
✅ Drop-In📋 Reference alternative (not in catalog)
PMEG3020EJ,115
✅ Drop-In📋 Reference alternative (not in catalog)
NSR0320MW2T1G
✅ Drop-In📋 Reference alternative (not in catalog)
CDBQR0230L-HF Maximum Ratings & Electrical Characteristics
| Diode Type | Schottky Barrier Diode |
| Reverse Voltage (VR) | 30 V |
| Average Rectified Current (Io) | 200 mA |
| Package | 0402/SOD-923F |
| Mounting Type | Surface Mount |
| Configuration | Single |
| Halogen Free | Yes (HF suffix) |
| RoHS Status | Compliant |
| Recovery Time (trr) | Schottky - negligible |
CDBQR0230L-HF Pin Configuration
| Pin 1 | Cathode (K) — Cathode terminal - marked with band on top of package per JEDEC SOD-923F convention |
| Pin 2 | Anode (A) — Anode terminal - unmarked end of the 0402/SOD-923F package |
Typical Applications
CDBQR0230L-HF is suitable for 6 applications: Reverse Polarity Protection, Low-Voltage Rectification in DC-DC Converters, Signal Clamping and ESD Protection, Power OR-ing for Redundant Supplies, Freewheeling Diode in Relay and Solenoid Drivers, Wearables and Hearable Device Charging Circuits.
Reverse Polarity Protection
The CDBQR0230L-HF is well-suited for reverse polarity protection in portable and battery-powered devices. Its 30V reverse voltage rating provides ample headroom above typical 5V USB and 12V adapter rails, while the Schottky technology delivers a forward voltage drop of approximately 0.3-0.4V at 100mA, minimizing power loss in the protection path. Placed in series with the input rail, it blocks reverse current when a battery is installed incorrectly, protecting downstream regulators and ICs. The 0402/SOD-923F footprint enables protection even in space-constrained designs like wearables and IoT sensor nodes. Compared to a P-MOSFET protection circuit, the diode approach is simpler and lower cost, trading some efficiency for BOM reduction.
Recommended
Low-Voltage Rectification in DC-DC Converters
In small DC-DC converters, the CDBQR0230L-HF serves as a low-loss rectifier or freewheeling diode. Its Schottky barrier construction produces a forward voltage drop approximately half that of a standard silicon diode, improving converter efficiency by 2-5% in low-voltage outputs. The 200mA current rating supports auxiliary rails, bias supplies, and signal-level power paths in industrial control and instrumentation systems. The negligible reverse recovery time of Schottky technology eliminates switching losses that would otherwise limit converter switching frequency. Designers should pair this diode with adequate input/output filtering to control conducted EMI.
Recommended
Signal Clamping and ESD Protection
The CDBQR0230L-HF can function as a clamping diode for sensitive signal lines in audio, video, and data interfaces. Its low forward voltage drop ensures that transient voltages are clamped close to the supply rail, protecting downstream CMOS inputs from over-voltage events. The 0402 footprint allows placement directly at connector pins or IC inputs in dense PCB layouts. Combined with a TVS diode or series resistor, it forms a robust ESD protection network for USB, HDMI, and other high-speed interfaces. Engineers should verify that the 200mA rating is not exceeded during worst-case transient events.
Recommended
Power OR-ing for Redundant Supplies
In redundant power supply designs, the CDBQR0230L-HF enables simple OR-ing of two power sources such as a USB VBUS and a battery. The Schottky diode prevents reverse current from flowing back into the lower-voltage source, ensuring that power is drawn only from the higher-voltage rail. While a MOSFET OR-ing controller is more efficient, the diode-based approach is lower cost and occupies minimal PCB area in space-constrained designs like IoT gateways and handheld instruments. The 30V rating supports supplies up to 24V industrial rails with adequate margin.
Recommended
Freewheeling Diode in Relay and Solenoid Drivers
Although the 200mA rating limits use to small relays and solenoids, the CDBQR0230L-HF serves as a compact freewheeling diode across inductive loads like miniature relays, small solenoid valves, and piezo buzzers. The Schottky technology provides faster turn-off than standard silicon diodes, reducing back-EMF transients and protecting driver transistors. The 0402 footprint is ideal when the freewheeling diode must be placed in close proximity to the inductive load for maximum effectiveness. Engineers should size the PCB copper pad for thermal dissipation if the relay is switched at high frequency.
Recommended
Wearables and Hearable Device Charging Circuits
In wearables, hearables, and fitness trackers, the CDBQR0230L-HF fits within the tightest PCB areas to provide rectification and protection functions in battery charging circuits. Its 0402/SOD-923F package occupies less than 1mm squared of board space, leaving more room for battery and antenna. The Halogen-Free compliance supports eco-label certification for consumer wearables, while the 200mA rating aligns with charging currents for small lithium-polymer cells. Combined with a charging IC and fuel gauge, the diode forms a complete charging subsystem for compact wearable designs.
Recommended
Recommended Products Summary
Engineering reference data for CDBQR0230L-HF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CDBQR0230L | RB521SM-30T2R | PMEG3020EJ,115 | NSR0320MW2T1G |
|---|---|---|---|---|---|
| Package | 0402/SOD-923F | 0402/SOD-923F - same | 0402/SOD-923F - same | 0402/SOD-923F - same | 0402/SOD-923F - same |
| Brand | Comchip Technology | Comchip Technology - same | ROHM Semiconductor | Nexperia | onsemi |
| Reverse Voltage (VR) | 30 V | 30 V | 30 V | 30 V | 23 V |
| Forward Current (Io) | 200 mA | 200 mA | 200 mA | 2 A (10x higher) | 1 A (5x higher) |
| Diode Type | Schottky | Schottky | Schottky | Schottky | Schottky |
| Halogen-Free | Yes (HF suffix) | No | Yes | Yes | Yes |
| RoHS Status | Compliant | Compliant | Compliant | Compliant | Compliant |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
Key Differentiators
- Compact 0402/SOD-923F footprint with Halogen-Free compliance (vs RB521SM-30T2R)
- 200mA current rating optimized for signal-level applications (vs PMEG3020EJ,115)
- Multi-source availability through authorized distributors (vs NSR0320MW2T1G)
Design Notes
Estimated: at the 200mA maximum forward current, the CDBQR0230L-HF in the 0402/SOD-923F package dissipates approximately 80mW (0.4V x 200mA). The 0402 package has limited thermal dissipation capacity with a theta_JA of approximately 400 C/W. Sustained operation near maximum rating requires PCB copper pad sizing per IPC-2152 to spread heat. For typical 50-100mA applications, standard reflow-soldered pads provide adequate thermal performance without additional copper pours.
Place the CDBQR0230L-HF as close as possible to the load or input connector to minimize parasitic inductance. The 0402/SOD-923F land pattern should follow the JEDEC standard with solder mask defined pads for better solder joint reliability. Avoid placing the diode near heat sources or under shielding cans that may trap thermal energy. For automated optical inspection (AOI), orient the cathode band consistently across the board to simplify inspection programming.
Do not exceed the 30V reverse voltage rating - transient spikes from inductive loads or hot-plug events can exceed this limit and cause avalanche breakdown. Always add margin (typically 20-30%) below the absolute maximum rating for production designs. The 200mA rating is for average rectified current; peak surge current is higher but must be limited in duration per the datasheet pulse curves. Reverse leakage current in Schottky diodes increases exponentially with temperature - verify leakage at maximum operating temperature, not just at 25C.
Compliance Information
RoHS and Halogen-Free compliance confirmed per the HF suffix in the MPN and Comchip product page. AEC-Q100 not applicable for this consumer-grade Schottky diode; the part is not qualified for automotive applications.
