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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Nexperia USA Inc. PSC1665LQ

Name: PSC1665LQ
Brand: Nexperia USA Inc.
SKU: PSC1665LQ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PSC1665LQ

Manufacturer:: Nexperia USA Inc.

Category:: Single Diodes

Package:: TO-247-2

Datasheet:: PSC1665LQ.pdf

Description:: SIC DIODES AND FETS

Quantity:: RFQ Add To RFQ list

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Inventory:450

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Product details

Overview

PSC1665LQ from Nexperia is a 650 V, 16 A silicon carbide Schottky diode in TO-247-2 (SOT8022) package, engineered as a high-efficiency freewheeling and output rectification device in high-frequency power converters. It delivers zero reverse recovery, 34 nC total capacitive charge at 400 V, 1.5–1.8 V forward voltage at 16 A/25 °C, and 1.3 K/W typical junction-to-case thermal resistance. It is deployed in photovoltaic inverters and telecom server power supplies where low switching loss and temperature-stable performance are critical.

For engineers reviewing the PSC1665LQ datasheet, PSC1665LQ pinout, PSC1665LQ application, or PSC1665LQ equivalent, key selection criteria include its SiC-based zero-recovery behavior, 650 V DC blocking capability, 16 A continuous forward current rating at Tc ≤ 120 °C, and real-2-pin TO-247 thermal interface design for heatsink mounting.

Technical Context

This Merged PiN Schottky (MPS) diode combines Schottky's low VF with PiN-like surge robustness, enabling high IFSM (650 A peak, 10 µs) without compromising soft switching. Its capacitive turn-off is temperature independent, eliminating thermal drift in dynamic losses across −55 °C to 175 °C junction range.

The device operates with no minority-carrier storage, delivering true zero QRR and eliminating reverse recovery spikes. Its figure-of-merit QC × VF is optimized at 34 nC × ~1.65 V, supporting >98% efficiency in 100 kHz+ hard-switched topologies like LLC resonant and phase-shifted full-bridge converters.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DC	650 V - Maximum DC blocking voltage; enables use in 400 V AC-input and 600 V bus systems without derating.
I_F	16 A continuous at T_c ≤ 120 °C - Sustains full-rated conduction in compact heatsink-mounted designs.
V_F	1.5–1.8 V @ 16 A, 25 °C - Low forward drop reduces conduction loss by ~30% vs. comparable Si fast recovery diodes.
Q_C	34 nC @ VR = 400 V, dI_F/dt = 200 A/µs - Quantifies stored capacitive charge driving turn-off EMI and snubber loss.
R_th(j-c)	1.3 K/W typical - Enables direct heatsink mounting with predictable thermal path for thermal design margining.
I_FSM	650 A @ tp = 10 µs - High surge capability supports inrush and fault-current handling in UPS and PV string protection.
V_RRM	650 V - Repetitive peak reverse voltage rating; defines maximum transient overvoltage tolerance in clamping applications.

Pinout & Package

Package: TO-247-2 (SOT8022), plastic through-hole, single-ended heatsink-mountable package with 10.88 mm lead pitch and metal mounting base electrically connected to cathode.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode (K)	Main current exit terminal; internally bonded to mounting base for low-inductance thermal and electrical path to heatsink.
2	Anode (A)	Main current entry terminal; isolated from case; connects to switching node or transformer secondary.
Mounting Base (mb)	Cathode extension	Electrically tied to Pin 1; provides mechanical attachment and thermal interface; must be insulated from chassis if cathode is not ground-referenced.

Key Features

Feature	Design Value
Zero forward & reverse recovery	Eliminates reverse recovery current tail and associated switching loss, enabling clean hard-switching up to 500 kHz.
Temperature-independent switching	Capacitive turn-off behavior remains stable from −55 °C to 175 °C, removing thermal compensation needs in wide-temp designs.
High I_FSM (650 A)	Supports short-circuit withstand in DC-DC modules and battery charger front-ends without external crowbar protection.
Low Q_C × V_F FoM	34 nC × ~1.65 V ≈ 56 nJ - Industry-leading figure-of-merit for 650 V SiC Schottky diodes, directly reducing system-level EMI filter size.
Reduced EMI generation	No di/dt-induced voltage spikes during turn-off; lowers common-mode noise and simplifies EMI filter design in Class B SMPS.

Applications

Photovoltaic Inverters

Server Power Supplies

Use Scenario: DC-side anti-islanding protection and MPPT-stage freewheeling in string inverters operating at 100–200 kHz.

IC Role / Device Role / Timing Role: Freewheeling diode in boost converter stage; handles bidirectional energy flow during zero-voltage switching transitions.

Use Value: Zero QRR eliminates shoot-through risk during synchronous rectifier dead-time, improving conversion efficiency by 0.8–1.2% at full load.

Use Scenario: Output rectification in 48 V intermediate bus converters powering ASIC/GPU rails in hyperscale data centers.

IC Role / Device Role / Timing Role: Secondary-side unidirectional rectifier in phase-shifted full-bridge topology; conducts during transformer reset intervals.

Use Value: 1.3 K/W R_th(j-c) enables 16 A conduction with <50 °C ΔT on standard extruded heatsinks, reducing thermal interface layer count.

Telecom Rectifiers

Battery Charging Infrastructure

Use Scenario: Hold-up and OR-ing function in -48 V distributed power architecture (DPA) rectifiers with hot-swap capability.

IC Role / Device Role / Timing Role: OR-ing diode in redundant power feed; blocks reverse current during module failure while sustaining forward conduction.

Use Value: 650 V V_RRM accommodates 100 V transients on -48 V bus without clamping, extending MTBF in harsh telecom environments.

Use Scenario: Output rectification in 800 V EV DC fast-charging modules with dual-phase interleaved PFC + LLC stages.

IC Role / Device Role / Timing Role: Secondary-side diode in LLC resonant transformer output; conducts during half-cycle conduction windows.

Use Value: 34 nC Q_C reduces snubber capacitor stress by 40% vs. Si counterparts, allowing smaller X7R ceramics and lower board area.

Equivalent & Alternatives

The following parts are listed as comparable options for similar SiC Schottky diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Wolfspeed C4D16065A	Same 650 V/16 A rating; 1.75 V V_F typ @ 16 A/25 °C; 38 nC Q_C; TO-247-2 package with isolated tab.	Higher V_F increases conduction loss by ~0.4 W at 16 A; isolated tab requires separate thermal interface design.	Select when isolation between cathode and heatsink is mandatory; avoid if minimizing conduction loss is primary goal.
ROHM SCT3160AL	650 V/16 A; 1.55 V V_F @ 16 A/25 °C; 32 nC Q_C; TO-247N package with non-isolated tab tied to cathode.	Slightly lower Q_C improves light-load efficiency; identical mounting configuration to PSC1665LQ.	Prefer for highest efficiency in 100–300 kHz applications; verify layout compatibility with ROHM's tab metallization.

Compared with C4D16065A and SCT3165AL, PSC1665LQ offers the best balance of low V_F (1.5–1.8 V), moderate Q_C (34 nC), and proven thermal interface reliability in high-volume telecom and solar deployments, making it optimal for cost-sensitive industrial power designs requiring field-proven robustness.

Availability

PSC1665LQ is available at Aetrix Electronics and suitable for photovoltaic inverters, server power supplies, and telecom rectifiers requiring stable component supply, long-term lifecycle support, and traceable sourcing from qualified wafer lots.

Supply support for PSC1665LQ 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

Nexperia is a global semiconductor expert headquartered in Nijmegen, Netherlands, specializing in high-performance analog, logic, discrete, and MOSFET solutions for power management and signal integrity.

PSC1665LQ belongs to Nexperia's high-voltage SiC Schottky diode product line, developed specifically for next-generation high-density, high-efficiency power conversion in renewable energy and data infrastructure applications.

FAQ

Is PSC1665LQ suitable for automotive applications?

No. PSC1665LQ is not AEC-Q101 qualified and lacks automotive-specific testing, qualification, or warranty coverage. Nexperia explicitly states that non-automotive-qualified products are unsuitable for safety-critical or life-support systems. Use only in industrial, telecom, or renewable energy applications per the official product status documentation.

What is the maximum allowable case temperature for continuous operation?

The absolute maximum case temperature for continuous forward current operation is 120 °C, as defined in the limiting values table. At T_c = 120 °C, the device sustains 16 A DC forward current. Exceeding this value risks thermal runaway and permanent degradation of the SiC die or package interface.

Does the mounting base require electrical isolation from the heatsink?

Yes. The mounting base (mb) is electrically connected to the cathode (Pin 1). If the cathode node is not at heatsink potential, an electrically insulating but thermally conductive pad or washer must be used to prevent short circuits while maintaining thermal performance.

How does PSC1665LQ's dv/dt ruggedness compare to silicon diodes?

PSC1665LQ has a rated dv/dt ruggedness of 100 V/ns under 0–480 V reverse bias, significantly exceeding typical 20–50 V/ns for fast recovery silicon diodes. This enables reliable operation in high-dV/dt environments such as SiC MOSFET-based half-bridges without snubber networks.

PSC1665LQ Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: TO-247-2

Packaging:: Tube

Product Status:: Active

Technology:: SiC (Silicon Carbide) Schottky

Voltage - DC Reverse (Vr) (Max):: 650 V

Current - Average Rectified (Io):: 16A

Voltage - Forward (Vf) (Max) @ If:: 1.8 V @ 16 A

Speed:: No Recovery Time > 500mA (Io)

Reverse Recovery Time (trr):: 0 ns

Current - Reverse Leakage @ Vr:: 180 µA @ 650 V

Capacitance @ Vr, F:: 475pF @ 1V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-247-2

Operating Temperature - Junction:: -55°C ~ 175°C

PSC1665LQ FAQ

1.How can I place an order for PSC1665LQ through Aetrix?

Please submit a Request for Quotation (RFQ) for PSC1665LQ 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 PSC1665LQ reliable?

The price and inventory of PSC1665LQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PSC1665LQ is usually 5 days.

3.What payment methods are accepted for PSC1665LQ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PSC1665LQ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PSC1665LQ?

PSC1665LQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PSC1665LQ 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 PSC1665LQ?

For technical support, including PSC1665LQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PSC1665LQ requirements.

6.How does Aetrix verify that PSC1665LQ is sourced from the original manufacturer or authorized distributors?

All PSC1665LQ 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 PSC1665LQ meets industry standards.

7.What is the process for return or replacement of PSC1665LQ?

All PSC1665LQ units undergo pre-shipment inspection (PSI). If there is an issue with PSC1665LQ, 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 PSC1665LQ part is unused and in its original packaging.

Return procedure for PSC1665LQ:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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