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

Vishay General Semiconductor - Diodes Division 25CTQ045

Name: 25CTQ045
Brand: Vishay General Semiconductor - Diodes Division
SKU: 25CTQ045
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 25CTQ045

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Diode Arrays

Package:: TO-220-3

Datasheet:: 25CTQ045.pdf

Description:: DIODE ARR SCHOTT 45V 15A TO2203

Quantity:: RFQ Add To RFQ list

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Product details

Overview

25CTQ045 from Vishay is a center-tap dual Schottky rectifier in TO-220AB package, rated for 2 × 15 A average forward current per leg, 45 V maximum reverse voltage, and 150 °C junction operation-designed for high-efficiency freewheeling and reverse battery protection in industrial DC/DC converters.

For engineers reviewing the 25CTQ045 datasheet, 25CTQ045 pinout, 25CTQ045 application, or 25CTQ045 equivalent, key selection criteria include its low 0.50 V forward drop at 15 A/125 °C, 990 A non-repetitive surge rating, 3.25 °C/W thermal resistance per leg, and center-tap cathode configuration enabling compact dual-output rectification without external wiring.

Technical Context

This device integrates two independent Schottky diode legs sharing a common cathode terminal, enabling synchronous rectification in center-tapped transformer topologies. Its proprietary barrier technology ensures stable operation up to 150 °C junction temperature with moderate reverse leakage (70 mA at 125 °C, VR = 45 V).

The TO-220AB package features a metal tab electrically connected to the common cathode, supporting direct heatsink mounting. Thermal design is enabled by validated R_thJC = 3.25 °C/W per leg and R_thCS = 0.50 °C/W case-to-heatsink performance under greased, smooth-surface conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
IF(AV) per leg	15 A (30 A total package rating; enables dual-channel 15 A outputs with shared cathode)
VRRM	45 V (supports 36 V nominal bus systems with 25 % safety margin)
VF @ 15 A, 125 °C	0.50 V (reduces conduction loss to ~7.5 W per leg in continuous operation)
IFSM per leg	990 A (withstands 5 µs surge events typical of inductive turn-off transients)
RthJC per leg	3.25 °C/W (enables 15 A operation at TC ≤ 102 °C without derating)
TJ range	–55 to +150 °C (qualified for industrial ambient environments without forced cooling)
CT per leg	900 pF @ 5 V (low capacitance supports >1 MHz switching in PFC and LLC stages)

Pinout & Package

Package: TO-220AB, center-tap configuration with isolated anodes and common cathode terminal. Metal tab is electrically connected to cathode and serves as thermal path.

Pin/Terminal	Circuit Role	Design Meaning
1 (Left lead)	Anode Leg 1	Input for first rectified path; electrically isolated from Leg 2 anode
2 (Center lead / Tab)	Common Cathode	Shared output node for both legs; electrically tied to metal tab for thermal + electrical connection
3 (Right lead)	Anode Leg 2	Input for second rectified path; fully independent of Leg 1 anode

Key Features

Feature	Design Value
Center-tap TO-220 package	Enables dual-output rectification in single footprint-eliminates need for two discrete diodes and external parallel wiring
Low VF at high temperature	0.50 V @ 15 A/125 °C reduces power loss by ≥35 % vs. standard silicon diodes in same thermal envelope
Guard ring construction	Improves ruggedness against voltage transients and mechanical stress, extending field life in industrial motor drives
High-purity epoxy encapsulation	Provides IPX4-equivalent moisture resistance and mechanical integrity during reflow and long-term thermal cycling
150 °C TJ rating	Supports operation in sealed enclosures or high-ambient environments without active cooling or derating

Applications

Switch-Mode Power Supply Output Rectification	Reverse Battery Protection
Use Scenario: Dual-rail 12 V/5 V DC/DC converter using center-tapped transformer secondary. IC Role / Device Role / Timing Role: Center-tap Schottky rectifier providing synchronous, low-loss output rectification for both rails. Use Value: 0.50 V VF at 15 A/125 °C minimizes conduction loss while maintaining <100 mV output ripple under full load.	Use Scenario: 24 V automotive-grade power module protecting against accidental reverse polarity connection. IC Role / Device Role / Timing Role: High-current, low-VF blocking diode placed in series with main power input. Use Value: 45 V VRRM and 990 A IFSM withstand jump-start surges and load-dump transients without failure.
Freewheeling Diode in Motor Drives	Industrial DC Bus Clamping
Use Scenario: H-bridge driver for 200 W BLDC fan with inductive kickback energy recovery. IC Role / Device Role / Timing Role: Freewheeling path for inductive current decay during PWM off-time. Use Value: 900 pF CT and 8.0 nH LS ensure fast recovery (<10 ns) and minimal ringing during commutation.	Use Scenario: 48 V industrial PLC backplane with transient overvoltage suppression on DC bus lines. IC Role / Device Role / Timing Role: Clamp diode limiting bus voltage rise during regenerative braking or capacitor charging. Use Value: 150 °C TJ rating and 3.25 °C/W RthJC allow sustained clamping at 15 A without thermal runaway.

Switch-Mode Power Supply Output Rectification

Reverse Battery Protection

Use Scenario: Dual-rail 12 V/5 V DC/DC converter using center-tapped transformer secondary.

IC Role / Device Role / Timing Role: Center-tap Schottky rectifier providing synchronous, low-loss output rectification for both rails.

Use Value: 0.50 V VF at 15 A/125 °C minimizes conduction loss while maintaining <100 mV output ripple under full load.

Use Scenario: 24 V automotive-grade power module protecting against accidental reverse polarity connection.

IC Role / Device Role / Timing Role: High-current, low-VF blocking diode placed in series with main power input.

Use Value: 45 V VRRM and 990 A IFSM withstand jump-start surges and load-dump transients without failure.

Freewheeling Diode in Motor Drives

Industrial DC Bus Clamping

Use Scenario: H-bridge driver for 200 W BLDC fan with inductive kickback energy recovery.

IC Role / Device Role / Timing Role: Freewheeling path for inductive current decay during PWM off-time.

Use Value: 900 pF CT and 8.0 nH LS ensure fast recovery (<10 ns) and minimal ringing during commutation.

Use Scenario: 48 V industrial PLC backplane with transient overvoltage suppression on DC bus lines.

IC Role / Device Role / Timing Role: Clamp diode limiting bus voltage rise during regenerative braking or capacitor charging.

Use Value: 150 °C TJ rating and 3.25 °C/W RthJC allow sustained clamping at 15 A without thermal runaway.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay VS-25CTQ045	Same die, identical electrical specs; differs only in RoHS-compliant marking and packaging (Pb-free plating)	No functional difference; suitable for lead-free assembly processes requiring JEDEC J-STD-609 compliance	Select VS-25CTQ045 when Pb-free manufacturing is required; otherwise 25CTQ045 remains optimal for legacy or mixed-technology lines
ON Semiconductor MUR2540CT	Silicon ultrafast rectifier (not Schottky); VF = 1.7 V @ 15 A/125 °C; higher conduction loss, lower leakage (IR = 10 µA)	Better for high-voltage, low-leakage applications where efficiency is secondary to cost or EMI control	Choose MUR2540CT only if thermal budget allows higher VF or if reverse leakage must be <100 µA at 125 °C

Compared with VS-25CTQ045, the original 25CTQ045 offers identical performance with standard plating, while MUR2540CT trades 1.2 V higher forward drop for superior reverse blocking-making it viable only where Schottky leakage is unacceptable and thermal headroom exists.

Availability

25CTQ045 is available at Aetrix Electronics and suitable for industrial power supplies, motor drive freewheeling circuits, and reverse battery protection systems requiring stable component supply across multi-year production cycles.

Supply support for 25CTQ045 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

Vishay Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements with emphasis on power handling, reliability, and high-temperature operation.

The 25CTQ... series was developed for high-current, high-efficiency rectification in industrial and automotive power conversion-targeting applications where low VF, rugged packaging, and 150 °C operation are mandatory.

FAQ

What is the maximum average forward current rating per leg for the 25CTQ045?

The 25CTQ045 is rated for 15 A average forward current per leg under DC or rectangular waveform conditions at TC = 102 °C with 50 % duty cycle. The total package rating is 30 A, but each leg operates independently with its own thermal path and current limit. This rating assumes proper heatsinking per the specified R_thJC = 3.25 °C/W and R_thCS = 0.50 °C/W values.

Is the metal tab on the 25CTQ045 electrically isolated or connected to a circuit node?

The metal tab on the 25CTQ045 is not isolated-it is internally connected to Pin 2, the common cathode terminal. This design allows simultaneous thermal transfer to a heatsink and electrical connection to the output node. Mounting requires electrical insulation only if the heatsink is grounded or referenced to a different potential than the cathode net.

What is the reverse leakage current of the 25CTQ045 at 125 °C and rated voltage?

At TJ = 125 °C and VR = 45 V, the 25CTQ045 exhibits a maximum reverse leakage current of 70 mA per leg. This value is confirmed in the Electrical Specifications table and reflects typical behavior for high-current Schottky devices operating near their thermal limit. It is significantly higher than silicon diodes but consistent with optimized low-VF Schottky barrier design.

Can the 25CTQ045 be used in place of a single-anode Schottky diode in a standard bridge configuration?

No-the 25CTQ045 is a center-tap dual-anode device with a common cathode, not a standard single-diode or full-bridge part. It cannot replace a discrete anode-cathode pair without circuit redesign. Its intended use is in center-tapped transformer topologies or dual-output freewheeling paths where both anodes feed into one shared cathode output.

Does the 25CTQ045 have avalanche capability, and if so, what are the limits?

Yes-the 25CTQ045 is rated for repetitive avalanche current of 3 A per leg and non-repetitive avalanche energy of 20 mJ per leg at TJ = 25 °C (IAS = 3.0 A, L = 4.40 mH). These ratings enable limited unclamped inductive switching tolerance, such as in flyback snubberless designs, but are not intended for continuous avalanche operation.

25CTQ045 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

Diode Configuration:: 1 Pair Common Cathode

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 45 V

Current - Average Rectified (Io) (per Diode):: 15A

Voltage - Forward (Vf) (Max) @ If:: 560 mV @ 15 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 1.75 mA @ 45 V

Operating Temperature - Junction:: -55°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220-3

25CTQ045 FAQ

1.How can I place an order for 25CTQ045 through Aetrix?

Please submit a Request for Quotation (RFQ) for 25CTQ045 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 25CTQ045 reliable?

The price and inventory of 25CTQ045 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 25CTQ045 is usually 5 days.

3.What payment methods are accepted for 25CTQ045?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25CTQ045 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 25CTQ045?

25CTQ045 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 25CTQ045 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 25CTQ045?

For technical support, including 25CTQ045 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25CTQ045 requirements.

6.How does Aetrix verify that 25CTQ045 is sourced from the original manufacturer or authorized distributors?

All 25CTQ045 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 25CTQ045 meets industry standards.

7.What is the process for return or replacement of 25CTQ045?

All 25CTQ045 units undergo pre-shipment inspection (PSI). If there is an issue with 25CTQ045, 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 25CTQ045 part is unused and in its original packaging.

Return procedure for 25CTQ045:

1.Submit a request within 90 days.

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

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