My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 301CNQ035
;;.jpg)
- Part No.:
- 301CNQ035
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Diode Arrays
- Package:
- TO-244AB
- Datasheet:
-
301CNQ035.pdf
- Description:
- DIODE MOD SCHOT 35V 300A TO244AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,349
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
301CNQ035 from Infineon Technologies is a center-tap Schottky rectifier module rated for 300 A average forward current, 35 V DC reverse voltage, and 175 °C maximum junction temperature; it features 0.59 V forward voltage at 150 A per leg and is used in high-current switching power supplies, UPS systems, and welding equipment.
For engineers reviewing the 301CNQ035 datasheet, 301CNQ035 pinout, 301CNQ035 application, or 301CNQ035 equivalent, key selection criteria include thermal resistance (0.40 °C/W per leg), surge capability (16,000 A @ 5 µs), low reverse leakage (90 mA @ 125 °C), and TO-244AB mechanical robustness for industrial power conversion.
Technical Context
This device is a dual-anode, common-cathode Schottky rectifier with center-tap configuration, enabling full-wave rectification without external diode pairing. Its proprietary barrier technology ensures stable operation up to 175 °C while maintaining low VF and controlled IR across temperature.
The TO-244AB package integrates two high-current legs sharing a common cathode terminal, with thermal resistance of 0.20 °C/W for the full package and 0.40 °C/W per leg - critical for parallel-leg thermal management in high-power converters and plating supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 300 A at 50% duty cycle, TC = 81 °C - supports continuous high-current DC output in industrial SMPS |
| VRRM | 35 V - defines maximum blocking voltage in reverse-biased operation for 36–48 V bus applications |
| VF @ 150 A | 0.59 V per leg at TJ = 125 °C - enables <1.2 V total conduction loss in full-wave topology |
| IFSM | 16,000 A @ 5 µs sine - withstands short-circuit surges in welder and UPS inverter stages |
| RthJC (per leg) | 0.40 °C/W - requires heatsink interface ≤0.10 °C/W (RthCS) to maintain TJ ≤175 °C at full load |
| IRM @ 125 °C | 90 mA per leg - limits standby power loss and thermal runaway risk in high-temp environments |
| CT | 5200 pF per leg at VR = 5 V - constrains high-frequency switching noise in >100 kHz converters |
Pinout & Package
Package: TO-244AB - modified JEDEC outline with insulated base, dual anode lugs (ANODE 1 / ANODE 2), and common cathode lug; designed for bolt-down mounting with 1/4-20 slotted hex terminal and 24–35 kg·cm base torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ANODE 1 | First anode connection | Accepts AC input phase 1; forms one half of center-tapped full-wave rectifier path |
| ANODE 2 | Second anode connection | Accepts AC input phase 2; completes center-tapped full-wave rectifier with ANODE 1 |
| COMMON CATHODE | Shared cathode node | Delivers full-wave rectified DC output; carries combined current of both legs (up to 600 A peak) |
| BASE | Electrically isolated thermal plane | Provides mechanical mounting and heat transfer path; electrically isolated from all terminals |
Key Features
| Feature | Design Value |
|---|---|
| 175 °C TJ operation | Enables deployment in engine bay, welding cells, or enclosed UPS without derating below 300 A |
| High-purity epoxy encapsulation | Prevents moisture ingress and mechanical cracking under thermal cycling in plating and industrial converters |
| Guard ring structure | Improves edge termination ruggedness, reducing failure risk during repetitive avalanche stress (EAS = 202 mJ) |
| Low VF + low IR trade-off optimization | Delivers 0.59 V @ 150 A / 90 mA @ 125 °C - balances conduction loss and leakage in high-temp operation |
Applications
| High-Current Switching Power Supplies | Uninterruptible Power Systems (UPS) |
|---|---|
Use Scenario: Primary rectification stage in 10–50 kW telecom or server PSUs operating at 100–500 kHz. IC Role / Device Role / Timing Role: Center-tap Schottky rectifier providing full-wave DC output with minimal conduction loss. Use Value: 0.59 V VF at 150 A reduces per-leg power loss to <89 W, lowering heatsink requirements vs. silicon diodes. | Use Scenario: Battery-charger and inverter-stage rectification in line-interactive and double-conversion UPS. IC Role / Device Role / Timing Role: High-surge-capable rectifier handling 16,000 A fault currents during bypass or overload events. Use Value: IFSM rating allows direct integration into UPS front-end without external surge limiters or fusing delays. |
| Electroplating Power Supplies | Industrial Welding Equipment |
Use Scenario: Constant-current DC output stage in 3–10 kA plating rectifiers with water-cooled heatsinks. IC Role / Device Role / Timing Role: Main power rectifier delivering stable low-VF DC with minimal ripple under 100% duty-cycle operation. Use Value: RthJC = 0.20 °C/W (package) enables thermal stability at 300 A avg with ≤20 °C rise above heatsink. | Use Scenario: Output rectification in IGBT-based inverter welders requiring fast recovery and surge tolerance. IC Role / Device Role / Timing Role: Free-wheeling and output rectifier handling intermittent 10–100 ms pulses at >400 A peak. Use Value: 175 °C TJ rating prevents thermal shutdown during repeated arc strikes and duty-cycle spikes. |
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 |
|---|---|---|---|
| VSKT300/04 | 40 V VRRM, 0.62 V VF @ 150 A, TO-247-3L package with single-anode topology | Lacks center-tap configuration; requires external dual-diode layout for full-wave use | Choose when discrete layout flexibility is preferred over integrated center-tap mechanical simplicity |
| IXYS DSEE30-04AS | 40 V VRRM, 0.65 V VF @ 150 A, TO-247AC package, no common cathode | Not center-tapped; needs two separate devices plus external busbar for same function | Select when existing PCB supports dual-device placement and thermal isolation between legs is required |
Compared with VSKT300/04 and DSEE30-04AS, the 301CNQ035 delivers integrated center-tap functionality in a single TO-244AB package, eliminating interconnect inductance and assembly complexity while maintaining lower VF and higher surge rating - critical for space-constrained, high-reliability industrial rectifiers.
Availability
301CNQ035 is available at Aetrix Electronics and suitable for high-current switching power supplies, uninterruptible power systems (UPS), and industrial welding equipment requiring stable component supply and long-term industrial-grade availability.
Supply support for 301CNQ035 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, automotive ICs, and industrial control solutions.
The 301CNQ... series was developed for high-efficiency, high-reliability rectification in industrial power conversion where thermal robustness, surge immunity, and low conduction loss are essential.
FAQ
What is the maximum junction temperature rating for the 301CNQ035?
The 301CNQ035 has a maximum junction temperature (TJ) rating of 175 °C, verified per Infineon's Bulletin PD-2.177 rev. D. This allows continuous operation in demanding thermal environments such as enclosed UPS cabinets or welding inverters without derating, provided case-to-heatsink thermal resistance remains ≤0.10 °C/W and case temperature stays within limits defined in Fig. 5 of the datasheet.
Does the 301CNQ035 support full-wave rectification natively?
Yes, the 301CNQ035 is a center-tap Schottky rectifier module with two anodes (ANODE 1 and ANODE 2) and a shared COMMON CATHODE terminal. This configuration enables native full-wave rectification from a center-tapped transformer secondary, eliminating the need for external diode pairing or additional layout routing - a key advantage over discrete dual-diode solutions like the 301CNQ035.
What is the forward voltage drop of the 301CNQ035 at rated current?
The 301CNQ035 exhibits a maximum forward voltage drop (VFM) of 0.59 V per leg at 150 A and TJ = 125 °C, and 0.69 V per leg at 150 A and TJ = 25 °C. At 300 A, VFM rises to 0.76 V per leg (TJ = 25 °C), confirming its suitability for high-current, low-loss DC output stages in industrial power supplies.
How is thermal management handled in the 301CNQ035 package?
The 301CNQ035 uses a TO-244AB package with an electrically isolated metal base optimized for bolt-down heatsinking. Its per-leg thermal resistance is 0.40 °C/W (junction-to-case), and the full-package RthJC is 0.20 °C/W. Effective cooling requires a smooth, greased mounting surface (RthCS = 0.10 °C/W typical) and base torque between 24–35 kg·cm to ensure uniform thermal contact - critical for sustaining 300 A average current.
Is the 301CNQ035 suitable for reverse battery protection applications?
Yes, the 301CNQ035 is explicitly cited in its datasheet for reverse battery protection due to its low forward voltage (0.59 V @ 150 A) and high surge capability (16,000 A @ 5 µs). When placed in series with the battery positive line, it blocks reverse polarity with minimal conduction loss during normal operation and survives jump-start transients without degradation - a design benefit confirmed in Infineon's application guidance for industrial vehicle systems.
301CNQ035 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):
- 35 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 @ 35 V
- Operating Temperature - Junction:
- -55°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
- Supplier Device Package:
- TO-244AB
301CNQ035 FAQ
1.How can I place an order for 301CNQ035 through Aetrix?
Please submit a Request for Quotation (RFQ) for 301CNQ035 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 301CNQ035 reliable?
The price and inventory of 301CNQ035 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 301CNQ035 is usually 5 days.
3.What payment methods are accepted for 301CNQ035?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 301CNQ035 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 301CNQ035?
301CNQ035 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 301CNQ035 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 301CNQ035?
For technical support, including 301CNQ035 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 301CNQ035 requirements.
6.How does Aetrix verify that 301CNQ035 is sourced from the original manufacturer or authorized distributors?
All 301CNQ035 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 301CNQ035 meets industry standards.
7.What is the process for return or replacement of 301CNQ035?
All 301CNQ035 units undergo pre-shipment inspection (PSI). If there is an issue with 301CNQ035, 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 301CNQ035 part is unused and in its original packaging.
Return procedure for 301CNQ035:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
301CNQ035 Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
