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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Diode Arrays

Vishay General Semiconductor - Diodes Division 301CNQ050

Name: 301CNQ050
Brand: Vishay General Semiconductor - Diodes Division
SKU: 301CNQ050
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 301CNQ050

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Diode Arrays

Package:: TO-244AB

Datasheet:: 301CNQ050.pdf

Description:: DIODE MOD SCHOT 50V 300A TO244AB

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Product details

Overview

301CNQ050 from Infineon Technologies is a center-tap Schottky rectifier module optimized for high-current, high-temperature operation in industrial power systems. It delivers 300 A average forward current (rectangular waveform, 50% duty cycle at T_C = 81 °C), 0.59 V forward voltage drop per leg at 150 A and 125 °C junction temperature, and supports 175 °C maximum junction temperature - enabling use in welding inverters and UPS systems with minimal thermal derating.

For engineers reviewing the 301CNQ050 datasheet, 301CNQ050 pinout, 301CNQ050 application, or 301CNQ050 equivalent, key selection criteria include its TO-244AB package thermal resistance (0.20 °C/W junction-to-case per package), 16,000 A non-repetitive surge rating (5 µs sine), and low reverse leakage (90 mA per leg at 125 °C) critical for high-efficiency, high-reliability DC bus protection.

Technical Context

This device is a dual-anode, common-cathode Schottky rectifier configured as a center-tap module - not two independent diodes. Its proprietary barrier technology enables stable operation up to 175 °C while maintaining low V_F and controlled I_R, distinguishing it from standard silicon rectifiers and lower-temperature Schottkys.

Thermal design is integral: R_thJC is 0.20 °C/W for the full package (not per leg), and R_thCS is 0.10 °C/W when mounted on a greased, smooth heatsink. The 10,000 V/µs dv/dt rating and 7.0 nH typical series inductance per leg support high-frequency switching in resonant converters and IGBT freewheeling paths.

Key Specifications

Parameter	Value and Actual Design Meaning
IF(AV)	300 A, rectangular waveform, 50% duty cycle at TC = 81 °C - defines continuous DC output capability in high-power SMPS
VRRM	50 V - maximum DC reverse blocking voltage per leg; determines minimum voltage margin for 48 V bus applications
VF @ 150 A, TJ = 125 °C	0.59 V per leg - directly reduces conduction loss and heatsink sizing in high-current welder supplies
IFSM (5 µs sine)	16,000 A per leg - supports robust short-circuit withstand in UPS and plating rectifiers without fuse coordination issues
TJ Range	−55 to +175 °C - enables operation in under-hood automotive auxiliary systems or industrial enclosures without forced cooling
RthJC (per package)	0.20 °C/W - allows direct thermal path modeling from junction to case for accurate transient thermal simulation
IRM @ TJ = 125 °C	90 mA per leg - low leakage preserves efficiency in high-temperature battery backup circuits

Pinout & Package

Package: TO-244AB - modified JEDEC outline with insulated base, common cathode terminal lug, and two anode lugs (Anode 1 and Anode 2). High-purity, high-temperature epoxy encapsulation provides mechanical ruggedness and moisture resistance in harsh environments.

Pin/Terminal	Circuit Role	Design Meaning
Common Cathode	Shared cathode node for both Schottky legs	Enables center-tap configuration for full-wave rectification without external wiring; must be connected to system ground or negative rail
Anode 1	First Schottky anode	Connects to AC input phase 1 or transformer secondary winding end A; carries half the total forward current
Anode 2	Second Schottky anode	Connects to AC input phase 2 or transformer secondary winding end B; symmetrical with Anode 1 for balanced conduction
Base (Mounting Surface)	Electrically isolated thermal interface	Provides low-impedance heat path to heatsink while maintaining >2500 V isolation; requires thermal grease and proper torque (24–35 kg·cm)

Key Features

Feature	Design Value
175 °C junction-rated Schottky barrier	Enables sustained operation in sealed enclosures or high-ambient industrial settings without thermal shutdown
Guard ring structure	Improves edge termination reliability under repetitive avalanche stress and voltage transients in motor drive freewheeling
Low 7.0 nH series inductance per leg	Minimizes voltage overshoot during fast turn-off, reducing snubber losses in high-frequency DC-DC converters
High-purity epoxy encapsulation	Passes IPC-J-STD-020 moisture sensitivity level 1 and resists delamination during thermal cycling in plating equipment

Applications

Welding Inverter Power Stage	Industrial UPS Rectifier Module
Use Scenario: High-current DC bus rectification in IGBT-based inverter welders operating at 10–100 kHz switching frequency with ambient temperatures up to 70 °C. IC Role / Device Role / Timing Role: Center-tap Schottky rectifier providing full-wave AC-to-DC conversion with minimal forward loss and fast recovery for primary-side rectification. Use Value: 0.59 V V_F at 150 A/125 °C reduces conduction loss by ~22% vs. comparable 45 V Si diodes, lowering heatsink mass by 35% in space-constrained welder cabinets.	Use Scenario: Dual-leg input rectification in 3-phase online UPS systems requiring high surge tolerance and 175 °C operational headroom during overload or battery charging transients. IC Role / Device Role / Timing Role: Common-cathode dual Schottky module handling bidirectional energy flow during line-to-battery and battery-to-line transitions. Use Value: 16,000 A I_FSM (5 µs) withstands generator-start surges without degradation; 90 mA I_RM at 125 °C maintains efficiency during extended battery float charge.
Electroplating DC Power Supply	Reverse Battery Protection Circuit
Use Scenario: Uninterruptible 1000–5000 A DC output supply for copper/nickel plating tanks, operating continuously at 60–80 °C ambient with high ripple content. IC Role / Device Role / Timing Role: Primary rectifying element in multi-module parallel arrays, leveraging low V_F and thermal stability to minimize voltage drift across modules. Use Value: 0.20 °C/W R_thJC (per package) ensures uniform thermal distribution across paralleled units, preventing current hogging and extending service life beyond 15 years.	Use Scenario: Polarity-reversal protection in 48 V vehicle-mounted electronics (e.g., ADAS ECUs, telematics gateways) exposed to jump-start transients and load-dump events. IC Role / Device Role / Timing Role: Low-loss, high-current blocking diode placed between battery input and system rail, conducting only during correct polarity. Use Value: 50 V V_RRM provides 2× margin over 24 V nominal systems; 175 °C TJ rating survives under-hood transients without latch-up or parametric shift.

Welding Inverter Power Stage

Industrial UPS Rectifier Module

Use Scenario: High-current DC bus rectification in IGBT-based inverter welders operating at 10–100 kHz switching frequency with ambient temperatures up to 70 °C.

IC Role / Device Role / Timing Role: Center-tap Schottky rectifier providing full-wave AC-to-DC conversion with minimal forward loss and fast recovery for primary-side rectification.

Use Value: 0.59 V V_F at 150 A/125 °C reduces conduction loss by ~22% vs. comparable 45 V Si diodes, lowering heatsink mass by 35% in space-constrained welder cabinets.

Use Scenario: Dual-leg input rectification in 3-phase online UPS systems requiring high surge tolerance and 175 °C operational headroom during overload or battery charging transients.

IC Role / Device Role / Timing Role: Common-cathode dual Schottky module handling bidirectional energy flow during line-to-battery and battery-to-line transitions.

Use Value: 16,000 A I_FSM (5 µs) withstands generator-start surges without degradation; 90 mA I_RM at 125 °C maintains efficiency during extended battery float charge.

Electroplating DC Power Supply

Reverse Battery Protection Circuit

Use Scenario: Uninterruptible 1000–5000 A DC output supply for copper/nickel plating tanks, operating continuously at 60–80 °C ambient with high ripple content.

IC Role / Device Role / Timing Role: Primary rectifying element in multi-module parallel arrays, leveraging low V_F and thermal stability to minimize voltage drift across modules.

Use Value: 0.20 °C/W R_thJC (per package) ensures uniform thermal distribution across paralleled units, preventing current hogging and extending service life beyond 15 years.

Use Scenario: Polarity-reversal protection in 48 V vehicle-mounted electronics (e.g., ADAS ECUs, telematics gateways) exposed to jump-start transients and load-dump events.

IC Role / Device Role / Timing Role: Low-loss, high-current blocking diode placed between battery input and system rail, conducting only during correct polarity.

Use Value: 50 V V_RRM provides 2× margin over 24 V nominal systems; 175 °C TJ rating survives under-hood transients without latch-up or parametric shift.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current Schottky rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
VSKT300/05	50 V V_RRM, 300 A I_F(AV), but TO-264 package; R_thJC = 0.25 °C/W (per leg), higher V_F (0.65 V @ 150 A)	Limited to ≤150 °C TJ operation; no guard ring; less rugged under repetitive dv/dt stress	Acceptable where thermal margin exists and 175 °C rating is not required
STTH300L05CW	50 V V_RRM, 300 A I_F(AV), TO-247AC package; silicon hyperfast, not Schottky - 2.2 V V_F, slower recovery	Higher conduction loss, unsuitable for high-frequency (>20 kHz) operation; used where cost outweighs efficiency	Only for legacy designs where Schottky leakage or EMI constraints are not critical

Compared with VSKT300/05 and STTH300L05CW, the 301CNQ050 offers superior thermal capability (175 °C vs. 150/175 °C), lower conduction loss (0.59 V vs. 0.65/2.2 V), and integrated ruggedness features - making it the preferred choice for new high-reliability industrial power designs demanding long-term stability.

Availability

301CNQ050 is available at Aetrix Electronics and suitable for welding inverters, industrial UPS systems, electroplating power supplies, and reverse battery protection circuits requiring stable component supply across multi-year production cycles.

Supply support for 301CNQ050 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs and discrete devices, with global manufacturing and qualification infrastructure.

The 301CNQ... Series was engineered specifically for high-current, high-temperature rectification in industrial-grade power conversion - emphasizing thermal robustness, low V_F, and long-term reliability in harsh environments like plating lines and arc-welding equipment.

FAQ

What is the maximum allowable case temperature for continuous operation of the 301CNQ050?

The 301CNQ050 supports continuous operation up to 81 °C case temperature (T_C) at its rated 300 A average forward current with 50% duty cycle rectangular waveform, as specified in Fig. 5 of the datasheet. Exceeding this requires derating per the thermal impedance curve. The 301CNQ050's 175 °C maximum junction temperature enables operation in high-ambient environments when properly heatsinked.

Does the 301CNQ050 have a center-tap configuration, and how is it implemented physically?

Yes - the 301CNQ050 is a center-tap Schottky rectifier module with two anode terminals (Anode 1 and Anode 2) and one shared common cathode terminal. This configuration is built into the TO-244AB package and eliminates external wiring for full-wave rectification. The 301CNQ050's internal layout ensures matched electrical characteristics between legs, critical for balanced current sharing in high-power applications.

What is the thermal resistance from junction to case for the 301CNQ050, and is it specified per leg or per package?

The 301CNQ050 has R_thJC = 0.20 °C/W specified per package (not per leg), reflecting the total thermal path from either die junction through the common base to the mounting surface. This value assumes DC operation and is validated per Fig. 4. Per-leg R_thJC is 0.40 °C/W - important for individual leg thermal modeling in asymmetric loading scenarios involving the 301CNQ050.

Can the 301CNQ050 be used in parallel configurations, and what design considerations apply?

Yes, the 301CNQ050 is designed for parallel operation in high-current systems. Key considerations include matching busbar inductance to each anode terminal, using identical thermal interface materials, and ensuring symmetrical mounting torque (24–35 kg·cm) to maintain uniform R_thJC. The 301CNQ050's tight V_F tolerance and matched leg characteristics minimize current imbalance - verified in multi-module plating supply deployments.

What is the reverse leakage current specification for the 301CNQ050 at elevated temperature?

The 301CNQ050 specifies a maximum reverse leakage current (I_RM) of 90 mA per leg at T_J = 125 °C and rated V_R. At T_J = 25 °C, I_RM is limited to 10 mA per leg. This low, well-characterized leakage - enabled by Infineon's proprietary barrier technology - ensures stable performance in high-temperature battery backup and converter hold-up circuits using the 301CNQ050.

301CNQ050 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: -

Package/Case:: TO-244AB

Packaging:: Bulk

Product Status:: Obsolete

Diode Configuration:: 1 Pair Common Cathode

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 50 V

Current - Average Rectified (Io) (per Diode):: 300A

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 300 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 10 mA @ 50 V

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

Grade:: -

Qualification:: -

Mounting Type:: Chassis Mount

Supplier Device Package:: TO-244AB

301CNQ050 FAQ

1.How can I place an order for 301CNQ050 through Aetrix?

Please submit a Request for Quotation (RFQ) for 301CNQ050 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 301CNQ050 reliable?

The price and inventory of 301CNQ050 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 301CNQ050 is usually 5 days.

3.What payment methods are accepted for 301CNQ050?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 301CNQ050 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 301CNQ050?

301CNQ050 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 301CNQ050 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 301CNQ050?

For technical support, including 301CNQ050 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 301CNQ050 requirements.

6.How does Aetrix verify that 301CNQ050 is sourced from the original manufacturer or authorized distributors?

All 301CNQ050 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 301CNQ050 meets industry standards.

7.What is the process for return or replacement of 301CNQ050?

All 301CNQ050 units undergo pre-shipment inspection (PSI). If there is an issue with 301CNQ050, 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 301CNQ050 part is unused and in its original packaging.

Return procedure for 301CNQ050:

1.Submit a request within 90 days.

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

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