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Vishay General Semiconductor - Diodes Division 303CNQ100
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- Part No.:
- 303CNQ100
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Diode Arrays
- Package:
- TO-244AB
- Datasheet:
-
303CNQ100.pdf
- Description:
- DIODE MOD SCHOTTKY 100V TO-244AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,943
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Product details
Overview
303CNQ100 from Infineon Technologies is a center-tap Schottky rectifier module rated for 100 V DC reverse voltage, 300 A average forward current (rectangular waveform), and 22,000 A non-repetitive surge current per leg, operating up to 175 °C junction temperature in high-current industrial power conversion systems.
For engineers reviewing the 303CNQ100 datasheet, 303CNQ100 pinout, 303CNQ100 application, or 303CNQ100 equivalent, key selection criteria include its low 0.72 V forward voltage at 150 A/125 °C, TO-244AB package thermal resistance of 0.15 °C/W (per package), and center-tap cathode configuration for dual-leg synchronous rectification in UPS and welding inverters.
Technical Context
This device implements a dual-anode, common-cathode Schottky architecture with proprietary barrier technology enabling stable operation at 175 °C. Its 0.30 °C/W junction-to-case thermal resistance per leg and 0.15 °C/W per package support high-power density mounting on heatsinks with greased interface.
The module delivers 4.5 mA reverse leakage per leg at 25 °C and 60 mA at 125 °C, with 4150 pF junction capacitance per leg at 5 V and 6.0 nH series inductance - optimized for high-frequency switching in converters and free-wheeling applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum DC reverse blocking voltage per leg; defines safe operating range in 48–96 V bus systems. |
| IF(AV) | 300 A - Average forward current rating under 50% duty cycle rectangular waveform at TC = 126 °C; supports continuous high-current output stages. |
| VF @ 150A, TJ=125°C | 0.72 V - Confirmed forward voltage drop per leg; enables <108 W conduction loss per leg at rated current and temperature. |
| IFSM (5 µs sine) | 22,000 A - Peak non-repetitive surge current per leg; withstands short-circuit events in welder and plating supply outputs. |
| TJ Range | −55 to +175 °C - Full operational junction temperature range; validated for under-hood and industrial ambient environments. |
| RthJC (per package) | 0.15 °C/W - Thermal resistance from junction to case across both legs; enables efficient heat extraction via single-baseplate mounting. |
| CT @ 5 V | 4150 pF - Junction capacitance per leg; limits high-frequency switching losses and EMI generation in >20 kHz converters. |
Pinout & Package
Package: TO-244AB - Modified JEDEC outline with insulated baseplate, center-tap common cathode terminal lug, and two anode lugs (Anode 1, Anode 2); designed for bolt-down mechanical mounting and high-current PCB or busbar interfacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Common Cathode | Shared cathode node for both Schottky diodes | Enables center-tap topology; connects to system ground or negative rail in dual-phase rectifiers. |
| Anode 1 | Anode of first Schottky diode leg | Connects to AC input phase 1 or transformer secondary winding end A in full-wave center-tap configuration. |
| Anode 2 | Anode of second Schottky diode leg | Connects to AC input phase 2 or transformer secondary winding end B - opposite polarity to Anode 1 relative to common cathode. |
| Baseplate | Electrically isolated thermal path | Provides mechanical mounting surface and primary heat dissipation path; electrically isolated per UL 60950-1 requirements. |
Key Features
| Feature | Design Value |
|---|---|
| 175 °C junction-rated operation | Validated reliability at maximum TJ; eliminates derating in high-ambient industrial enclosures and welding equipment. |
| Low VF at high temperature | 0.72 V @ 150 A / 125 °C ensures minimal conduction loss rise under thermal stress - critical for efficiency retention in UPS systems. |
| High-purity epoxy encapsulation | Enhances moisture resistance and mechanical strength for long-term reliability in plating and marine environments. |
| Guard ring structure | Improves ruggedness against voltage transients and edge breakdown during repetitive avalanche stress in converter freewheeling. |
| Center-tap module integration | Reduces component count vs. discrete dual-diode solutions; simplifies layout and improves thermal coupling between legs. |
Applications
| High-Current Switching Power Supplies | Uninterruptible Power Supplies (UPS) |
|---|---|
Use Scenario: Primary rectification stage in 10–50 kW telecom and server PSUs using center-tap transformer topology. IC Role / Device Role / Timing Role: Dual-leg Schottky rectifier providing low-loss AC-to-DC conversion with shared cathode return path. Use Value: 0.72 V VF at 125 °C reduces conduction loss by ~15% versus standard 150 °C-rated alternatives, improving full-load efficiency. | Use Scenario: Output rectification in double-conversion online UPS systems handling battery backup and grid-synchronized inverter output. IC Role / Device Role / Timing Role: Center-tap freewheeling diode pair managing reactive energy during inverter commutation and load transients. Use Value: 22,000 A IFSM per leg absorbs inductive kickback without failure, extending system MTBF during brownout recovery. |
| Industrial Plating Power Supplies | Resistance Welding Inverters |
Use Scenario: DC output stage in 30–100 kA electroplating rectifiers delivering ripple-free current to electrolytic tanks. IC Role / Device Role / Timing Role: High-average-current Schottky module converting medium-frequency AC (400–1000 Hz) to regulated DC. Use Value: −55 to +175 °C TJ range allows direct mounting on water-cooled busbars without thermal interface degradation over 10+ year service life. | Use Scenario: Secondary-side rectification in mid-frequency (1–10 kHz) inverter-based spot welders requiring rapid current ramp-up and collapse. IC Role / Device Role / Timing Role: Low-inductance (6.0 nH) center-tap rectifier minimizing voltage overshoot during microsecond-scale current reversal. Use Value: 6.0 nH LS per leg reduces di/dt-induced voltage spikes by >30% versus TO-247 discrete packages, protecting IGBT gate drivers. |
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 |
|---|---|---|---|
| VSKT120/12 | 1200 V VR, 120 A IF(AV), TO-247AC package, higher VF (0.95 V @ 120 A) | Designed for HV DC link snubbing, not center-tap rectification; unsuitable for 100 V bus systems. | Select only if system requires >1 kV blocking and discrete mounting; not a functional substitute for 303CNQ100. |
| IXYS DSEC180-06A | 600 V VR, 180 A IF(AV), dual common-cathode fast recovery diode, not Schottky | Higher VF (~1.8 V) and slower recovery increase switching losses; used in motor drive freewheeling, not low-VF rectification. | Consider only where 600 V rating and soft recovery are mandatory; trade-off is 2.5× higher conduction loss vs. 303CNQ100. |
Compared with VSKT120/12 and IXYS DSEC180-06A, the 303CNQ100 uniquely combines 100 V rating, 300 A average current, center-tap Schottky architecture, and 175 °C operation - making it irreplaceable for high-efficiency, high-temperature, high-current rectification where low VF and thermal robustness are non-negotiable.
Availability
303CNQ100 is available at Aetrix Electronics and suitable for high-current switching power supplies, uninterruptible power supplies (UPS), and industrial plating power supplies requiring stable component supply and long-term industrial-grade availability.
Supply support for 303CNQ100 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 semiconductors, microcontrollers, and sensor solutions for industrial, automotive, and energy markets.
The 303CNQ... Series was engineered for high-reliability, high-temperature rectification in demanding industrial power systems - emphasizing low VF, rugged thermal design, and center-tap integration for reduced system complexity.
FAQ
What is the maximum junction temperature rating for the 303CNQ100?
The 303CNQ100 is rated for a maximum junction temperature of +175 °C, verified across its full operating range per Infineon's Bulletin PD-2.234 rev. E. This rating enables deployment in high-ambient environments such as welding inverters and plating rectifiers without thermal derating. The 303CNQ100 maintains stable reverse leakage and forward voltage characteristics up to this limit, supported by proprietary barrier technology and high-purity epoxy encapsulation.
Does the 303CNQ100 have a center-tap configuration, and how is it implemented?
Yes, the 303CNQ100 features a center-tap configuration with a common cathode terminal and two separate anode terminals (Anode 1 and Anode 2). This architecture is physically realized in the TO-244AB package with a shared metal baseplate and isolated anode lugs. The 303CNQ100 uses this layout to enable full-wave rectification from a center-tapped transformer secondary, reducing ripple and component count compared to bridge configurations.
What is the forward voltage drop of the 303CNQ100 at rated conditions?
The 303CNQ100 exhibits a forward voltage drop of 0.72 V per leg at 150 A and junction temperature of 125 °C, as specified in the electrical characteristics table. At 300 A and 25 °C, VF rises to 1.09 V. These values reflect actual measured performance under DC and pulsed conditions, directly impacting conduction loss calculations in high-current designs using the 303CNQ100.
Can the 303CNQ100 be used in parallel configurations?
The 303CNQ100 is not intended for parallel operation due to inherent forward voltage mismatch between legs and thermal coupling limitations in the TO-244AB package. Its design targets single-module, center-tap use with balanced current sharing across its internal dual-leg structure. For higher current needs, system-level scaling (e.g., multiple independent 303CNQ100 modules with matched thermal paths) is required - not intra-package paralleling.
What thermal resistance values apply to the 303CNQ100 package?
The 303CNQ100 specifies RthJC = 0.15 °C/W per package (not per leg), reflecting total thermal resistance from both junctions to the baseplate. Per-leg RthJC is 0.30 °C/W. With a typical RthCS of 0.10 °C/W to a greased heatsink, the total thermal path enables ~150 W per leg dissipation at ΔT = 45 °C - confirmed in Fig. 6 of the datasheet. These values are measured under DC conditions and validated for the TO-244AB mechanical footprint.
303CNQ100 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):
- 100 V
- Current - Average Rectified (Io) (per Diode):
- 300A
- Voltage - Forward (Vf) (Max) @ If:
- 1.09 V @ 300 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 4.5 mA @ 100 V
- Operating Temperature - Junction:
- -55°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
- Supplier Device Package:
- TO-244AB
303CNQ100 FAQ
1.How can I place an order for 303CNQ100 through Aetrix?
Please submit a Request for Quotation (RFQ) for 303CNQ100 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 303CNQ100 reliable?
The price and inventory of 303CNQ100 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 303CNQ100 is usually 5 days.
3.What payment methods are accepted for 303CNQ100?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 303CNQ100 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 303CNQ100?
303CNQ100 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 303CNQ100 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 303CNQ100?
For technical support, including 303CNQ100 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 303CNQ100 requirements.
6.How does Aetrix verify that 303CNQ100 is sourced from the original manufacturer or authorized distributors?
All 303CNQ100 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 303CNQ100 meets industry standards.
7.What is the process for return or replacement of 303CNQ100?
All 303CNQ100 units undergo pre-shipment inspection (PSI). If there is an issue with 303CNQ100, 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 303CNQ100 part is unused and in its original packaging.
Return procedure for 303CNQ100:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
303CNQ100 Tags
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BAV99-7-F
Diodes Incorporated
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Diodes Incorporated
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BAV99,215
Nexperia USA Inc.
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Diodes Incorporated
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BAS40-04LT1G
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MMBD1503-TP
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