My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 20CTQ045S
- Part No.:
- 20CTQ045S
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Diode Arrays
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
20CTQ045S.pdf
- Description:
- DIODE ARR SCHOTT 45V 10A TO263AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,959
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
20CTQ045S from Vishay is a dual common-cathode Schottky rectifier in D2PAK package, rated for 2 × 10 A average forward current per leg, 45 V maximum reverse voltage, and 0.57 V forward voltage at 10 A and 125 °C junction temperature. It serves as a high-efficiency freewheeling or output rectifier in DC-DC converters and switching power supplies operating up to 175 °C.
For engineers reviewing the 20CTQ045S datasheet, 20CTQ045S pinout, 20CTQ045S application, or 20CTQ045S equivalent, key selection criteria include its dual-leg thermal resistance (3.25 °C/W per leg), low leakage (15 mA at 125 °C), 900 pF junction capacitance, and suitability for high-frequency, high-temperature power conversion where low conduction loss and ruggedness are critical.
Technical Context
The 20CTQ045S integrates two independent Schottky diodes sharing a common cathode terminal, enabling synchronous or interleaved rectification topologies. Its proprietary barrier technology minimizes reverse leakage at elevated temperatures while maintaining low VF across 25–125 °C.
Designed for Q101 qualification, it supports automotive-grade reliability with guard ring protection, high-purity epoxy encapsulation, and 1060 A non-repetitive surge capability per leg under 5 µs sine pulse conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) per leg | 20 A average forward current (rectangular waveform, 50 % duty cycle at TC = 145 °C) - enables compact heatsink design in high-power SMPS |
| VRRM | 45 V maximum repetitive reverse voltage - suitable for 36 V nominal bus systems with margin |
| VF @ 10 A, 125 °C | 0.57 V - reduces conduction loss by ~15 % vs. comparable 40 V parts at high-temp operation |
| IRM @ 125 °C | 15 mA reverse leakage per leg - ensures stable blocking in hot environments like engine compartments |
| RthJC per leg | 3.25 °C/W - allows direct thermal coupling to heatsink without derating penalties in dual-leg layout |
| CT @ 5 V | 900 pF junction capacitance - supports >1 MHz switching with minimal capacitive turn-on loss |
| dV/dt | 10,000 V/µs - withstands fast transient recovery in hard-switched topologies |
Pinout & Package
D2PAK (TO-263) surface-mount package with 3 terminals: Pin 1 (Anode 1), Pin 2 (Common Cathode), Pin 3 (Anode 2). Mounting surface requires smooth finish and thermal grease for optimal RthCS of 0.50 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode of Diode Leg 1 | Connects to input/high-side node of first rectification path; carries full 10 A leg current |
| Pin 2 | Common Cathode | Shared output node for both legs; must be routed with low-inductance copper pour for EMI control |
| Pin 3 | Anode of Diode Leg 2 | Connects to second input/high-side node; enables dual-phase or redundant rectification |
Key Features
| Feature | Design Value |
|---|---|
| 175 °C TJ rating | Enables operation in under-hood automotive or industrial enclosures without forced cooling |
| Guard ring structure | Improves long-term reliability under repetitive avalanche stress (EAS = 13 mJ per leg) |
| Q101 qualification | Meets AEC-Q101 stress test requirements for discrete semiconductors in automotive applications |
| High-purity epoxy encapsulation | Provides enhanced moisture resistance (IP67-equivalent sealing) and mechanical robustness in vibration-prone systems |
| Center-tap common-cathode topology | Reduces PCB trace count vs. discrete dual-diode solution and simplifies layout symmetry for balanced current sharing |
Applications
| Automotive DC-DC Converters | Industrial Switch-Mode Power Supplies |
|---|---|
Use Scenario: 12 V to 5 V/3.3 V step-down converter in ADAS ECU with ambient temperature up to 105 °C. IC Role / Device Role / Timing Role: Output synchronous rectifier replacing MOSFETs in CCM mode, leveraging low VF to minimize conduction loss. Use Value: Delivers 2 % efficiency gain over 40 V Schottky alternatives at 125 °C junction, extending thermal headroom. | Use Scenario: 48 V input telecom rectifier module delivering 20 A at 12 V with forced air cooling. IC Role / Device Role / Timing Role: Dual-leg freewheeling diode in phase-shifted full-bridge topology. Use Value: Enables 92.5 % peak efficiency at full load due to combined 0.57 V VF and 900 pF CT minimizing switching loss. |
| Reverse Battery Protection | Motor Drive Freewheeling |
Use Scenario: Input protection circuit in battery-powered medical device accepting ±24 V input polarity. IC Role / Device Role / Timing Role: Common-cathode dual diode configured as OR-ing + reverse polarity clamp. Use Value: Blocks –45 V reverse transients while conducting 20 A forward current with <0.76 V drop at 20 A/25 °C. | Use Scenario: H-bridge motor driver for 24 V BLDC fan with 15 A peak current and 20 kHz PWM. IC Role / Device Role / Timing Role: Bidirectional freewheeling path absorbing inductive kickback during PWM off-time. Use Value: Withstands 1060 A surge pulses and exhibits <8 nH series inductance for clean voltage clamping. |
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-20CTQ045 | Same electrical specs but TO-220 through-hole package; RthJC = 2.5 °C/W (per package), not per leg | Requires drilled PCB and larger heatsink footprint; unsuitable for high-density SMT designs | Select 20CTQ045S for space-constrained SMT layouts needing per-leg thermal isolation |
| ON Semiconductor MBR2045CT | 45 V, 2 × 10 A, but VF = 0.72 V @ 10 A/125 °C; no Q101 qualification; RthJC = 4.0 °C/W per leg | Limited to commercial-temperature industrial use; higher conduction loss increases thermal stress | Choose 20CTQ045S when automotive qualification, lower VF, or better thermal performance is required |
Compared with VS-20CTQ045 and MBR2045CT, the 20CTQ045S delivers superior thermal management per leg, automotive-grade reliability, and lower forward voltage-making it optimal for high-density, high-temperature SMT power conversion where per-leg thermal decoupling and Q101 compliance are mandatory.
Availability
20CTQ045S is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial switch-mode power supplies, and motor drive freewheeling applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 20CTQ045S 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 manufacturer of discrete semiconductors and passive components, specializing in high-reliability power devices for automotive, industrial, and computing markets.
The 20CTQ...S series belongs to Vishay's High Power Products line, engineered specifically for high-current, high-temperature rectification in automotive and industrial power systems demanding Q101 qualification and ruggedized packaging.
FAQ
What is the maximum junction temperature rating for the 20CTQ045S?
The 20CTQ045S is rated for continuous operation up to 175 °C junction temperature, validated per Vishay's Q101 qualification and supported by its high-purity epoxy encapsulation and thermal design. This rating allows deployment in under-hood automotive environments and sealed industrial enclosures without active cooling. The 20CTQ045S maintains specified VF and IRM performance across this full range, with datasheet curves confirmed at 175 °C.
Does the 20CTQ045S have automotive qualification?
Yes, the 20CTQ045S is designed and qualified to AEC-Q101 standards for discrete semiconductors. Its construction includes a guard ring for ruggedness, high-temperature epoxy for moisture resistance, and rigorous testing for temperature cycling, humidity, and surge robustness. This makes the 20CTQ045S suitable for automotive powertrain and body electronics where reliability under harsh conditions is mandatory.
How does the 20CTQ045S differ from the 20CTQ045-1 variant?
The 20CTQ045S uses a D2PAK (TO-263) surface-mount package, while the 20CTQ045-1 uses a TO-262 (I²PAK) package. Both share identical electrical specifications-including 45 V VRRM, 20 A IF(AV) per leg, and 0.57 V VF-but differ in thermal resistance (RthJC = 3.25 °C/W per leg for 20CTQ045S vs. 2.5 °C/W per package for 20CTQ045-1) and mounting method. The 20CTQ045S is optimized for high-density SMT assembly.
What is the typical junction capacitance of the 20CTQ045S and why does it matter?
The 20CTQ045S has a typical junction capacitance of 900 pF per leg at 5 V reverse bias and 25 °C. This value directly impacts switching loss and EMI generation in high-frequency converters. A lower CT reduces capacitive turn-on current and dv/dt-induced noise, enabling cleaner waveforms and easier EMI filtering-especially critical in >500 kHz SMPS designs where the 20CTQ045S is commonly deployed.
Can the 20CTQ045S be used in reverse battery protection circuits?
Yes, the 20CTQ045S is well-suited for reverse battery protection due to its common-cathode dual-anode configuration, 45 V VR rating, and low forward voltage. When wired with anodes as inputs and the shared cathode as output, it blocks reverse polarity while conducting up to 20 A forward current with minimal loss. Its 15 mA IRM at 125 °C ensures stable blocking even in hot environments, making the 20CTQ045S ideal for automotive and portable equipment input protection.
20CTQ045S Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- 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):
- 10A
- Voltage - Forward (Vf) (Max) @ If:
- 640 mV @ 10 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 2 mA @ 45 V
- Operating Temperature - Junction:
- -55°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263AB (D2PAK)
20CTQ045S FAQ
1.How can I place an order for 20CTQ045S through Aetrix?
Please submit a Request for Quotation (RFQ) for 20CTQ045S 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 20CTQ045S reliable?
The price and inventory of 20CTQ045S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 20CTQ045S is usually 5 days.
3.What payment methods are accepted for 20CTQ045S?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 20CTQ045S transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 20CTQ045S?
20CTQ045S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 20CTQ045S 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 20CTQ045S?
For technical support, including 20CTQ045S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 20CTQ045S requirements.
6.How does Aetrix verify that 20CTQ045S is sourced from the original manufacturer or authorized distributors?
All 20CTQ045S 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 20CTQ045S meets industry standards.
7.What is the process for return or replacement of 20CTQ045S?
All 20CTQ045S units undergo pre-shipment inspection (PSI). If there is an issue with 20CTQ045S, 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 20CTQ045S part is unused and in its original packaging.
Return procedure for 20CTQ045S:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
20CTQ045S 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 …
