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

STMicroelectronics FERD40L60CTS

Name: FERD40L60CTS
Brand: STMicroelectronics
SKU: FERD40L60CTS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FERD40L60CTS

Manufacturer:: STMicroelectronics

Category:: Diode Arrays

Package:: TO-220-3

Datasheet:: FERD40L60CTS.pdf

Description:: DIODE ARRAY FERD 60V 20A TO-220

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Product details

Overview

FERD40L60CTS from STMicroelectronics is a 60 V field-effect rectifier diode in TO-220AB package, rated for 40 A total average forward current (2 × 20 A dual-diode configuration), with typ. 0.375 V forward voltage at 4 A/125 °C and max. 150 °C junction temperature - optimized for high-efficiency, thermally constrained AC/DC adapters and USB-C chargers.

For engineers reviewing the FERD40L60CTS datasheet, FERD40L60CTS pinout, FERD40L60CTS application, or FERD40L60CTS equivalent, key selection criteria include low VF/IR trade-off, stable leakage up to 125 °C, thermal resistance of 0.8 °C/W (junction-to-case, device level), and suitability for high-frequency synchronous rectification in compact power supplies.

Technical Context

This dual-diode rectifier uses ST's proprietary field-effect rectifier process to achieve superior conduction-loss vs. leakage-current balance. Its architecture eliminates minority-carrier storage, enabling zero reverse-recovery charge (Qrr ≈ 0) and eliminating switching losses typical of PN junction diodes.

Designed for unidirectional conduction in secondary-side synchronous rectification, it operates with DC or high-frequency square-wave excitation (e.g., 100–500 kHz LLC or QR flyback). The dual-die TO-220AB configuration supports interleaved or parallel output paths without external isolation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	60 V - maximum repetitive reverse blocking voltage; enables use in 20–24 V output systems with 2× safety margin against transient overshoot
I_F(AV)	40 A (device), 20 A per diode - continuous DC output current capability at T_C = 130 °C; supports ≥65 W adapter designs with minimal heatsink
V_F (typ.)	0.375 V @ 4 A, 125 °C - reduces conduction loss to ~1.5 W per diode at full load, lowering thermal stress vs. Schottky alternatives
I_R (max)	80 mA @ 125 °C, V_R = V_RRM - stable leakage ensures predictable standby power and no thermal runaway under hot reverse bias
R_th(j-c)	0.8 °C/W (device) - enables direct mounting to heatsink; achieves T_j ≤ 135 °C at 40 A with 25 °C ambient and 10 cm² aluminum heatsink
T_j(max)	+150 °C - allows operation in sealed enclosures or high-ambient environments (e.g., automotive cabin chargers, industrial PoE injectors)

Pinout & Package

TO-220AB package with isolated tab (electrically connected to cathode), 3-terminal configuration: two anodes (A1, A2) and one common cathode (K). Mounting hole centered on tab for mechanical stability and thermal transfer.

Pin/Terminal	Circuit Role	Design Meaning
A1	Anode 1	Input terminal for first diode path; electrically independent of A2; enables dual-output or phase-split rectification
A2	Anode 2	Input terminal for second diode path; shares cathode K; supports current sharing or redundancy
K	Common Cathode	Output node tied to system ground or V_OUT; tab is internally bonded to K and must be electrically isolated from heatsink unless grounded

Key Features

Feature	Design Value
Field-effect rectifier topology	Zero Q_rr and negligible reverse recovery loss - eliminates EMI spikes and gate-drive stress in synchronous rectifier controllers
Low VF/IR trade-off	0.375 V @ 4 A / 125 °C and <80 mA leakage @ 125 °C - enables >94% efficiency in 20–30 W USB PD adapters
Dual-diode integration	Two independent 20 A diodes in single TO-220AB - reduces PCB area by 40% vs. discrete dual-Schottky solution and improves thermal coupling
High T_j rating	150 °C max junction temperature - supports operation in enclosed, fanless chargers without derating at 50 °C ambient

Applications

USB-C Power Delivery Adapters

Industrial 24 V DC Power Supplies

Use Scenario: 45–65 W compact wall adapters with dual-output (5 V/20 V) or programmable power supply (PPS) regulation.

IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier replacing Schottky diodes; driven by controller IC (e.g., STSR3) via gate signal.

Use Value: Reduces conduction loss by 35% vs. 40 V Schottky, cutting die temperature rise by 22 °C at full load and enabling smaller heatsinks.

Use Scenario: DIN-rail mounted 24 V/20 A industrial power supplies operating continuously at 60 °C ambient.

IC Role / Device Role / Timing Role: Output rectifier in half-bridge LLC resonant converter; handles bidirectional current during dead-time commutation.

Use Value: Stable 80 mA leakage at 125 °C prevents thermal runaway under sustained overload, improving long-term reliability over standard Si diodes.

Automotive Cabin Chargers

Medical-Grade Patient-Monitoring Power Modules

Use Scenario: In-vehicle 12 V to 5/9/15 V USB-C chargers exposed to -40 to +85 °C ambient and vibration.

IC Role / Device Role / Timing Role: Isolated output rectifier in flyback converter; operates with variable duty cycle and high ripple current.

Use Value: 0.8 °C/W R_th(j-c) allows direct mounting to metal chassis, eliminating separate heatsink and meeting ISO 16750-4 vibration requirements.

Use Scenario: Low-noise, low-leakage auxiliary power supply for ECG/SpO₂ modules requiring <1 µA standby current.

IC Role / Device Role / Timing Role: Primary rectifier in ultra-low-noise linear post-regulator stage; blocks reverse current during sleep mode.

Use Value: Leakage <1.1 mA at 25 °C and <46 mA at 45 V reverse bias ensures standby power remains below 210 µW - critical for battery-backed operation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar field-effect rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH30L06D	60 V, 30 A single-diode fast recovery diode; Q_rr = 45 nC; V_F = 1.15 V @ 15 A	Higher conduction loss, measurable reverse recovery; requires snubber in high-frequency designs	Select only if cost sensitivity outweighs efficiency and EMI targets; not suitable for >200 kHz operation
FERD30L60CT	60 V, 30 A (15 A per diode) dual-field-effect rectifier; same process but lower current rating; R_th(j-c) = 1.1 °C/W	Lower thermal capacity; limited to ≤45 W adapters or forced-air-cooled systems	Valid drop-in replacement where board space and layout match, but derate output power by 25%

Compared with FERD40L60CTS, STTH30L06D trades higher VF and Qrr for lower unit cost, while FERD30L60CT retains the zero-Qrr advantage but sacrifices 25% current capacity and thermal headroom - making FERD40L60CTS optimal for thermally dense, high-efficiency 45–65 W designs.

Availability

FERD40L60CTS is available at Aetrix Electronics and suitable for USB-C power adapters, industrial 24 V DC supplies, and automotive cabin chargers requiring stable component supply, consistent parametric performance across production lots, and long-term lifecycle support.

Supply support for FERD40L60CTS 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

FERD40L60CTS belongs to ST's Field-Effect Rectifier Diode product line, engineered specifically to replace Schottky and fast-recovery diodes in high-frequency, high-efficiency AC/DC and DC/DC converters where thermal density and EMI are critical constraints.

FAQ

Is FERD40L60CTS pin-compatible with standard TO-220AB Schottky diodes?

No. While the TO-220AB outline matches mechanically, FERD40L60CTS has two anodes (A1, A2) and one common cathode (K), whereas most dual-Schottky TO-220AB parts use A-K-A or K-A-K configurations. PCB layout must allocate separate anode traces and verify tab grounding per ST's recommended mounting instructions.

What is the maximum allowable case temperature for continuous 40 A operation?

Per datasheet Table 2, I_F(AV) = 40 A is rated at T_C = 130 °C. To sustain this, the heatsink must maintain case temperature ≤130 °C under worst-case ambient and airflow. With R_th(j-c) = 0.8 °C/W and P_cond ≈ 15.6 W (using P = 0.27×I_F(AV) + 0.0155×I_F(RMS)²), junction temperature stays ≤142 °C at 130 °C case.

Does FERD40L60CTS require a gate drive signal like a MOSFET?

No. It is a passive rectifier device with intrinsic field-effect conduction mechanism - no external gate control needed. It conducts when anode voltage exceeds cathode voltage by >0.25 V, and blocks when reverse biased, behaving electrically like a diode but with zero Q_rr and lower V_F.

Can FERD40L60CTS be used in avalanche mode?

No. The device is not rated for repetitive avalanche operation. Absolute maximum V_RRM is 60 V; exceeding this risks irreversible breakdown. System design must ensure all transients (e.g., transformer leakage spikes) remain within 60 V, typically using clamping circuits or proper transformer design.

FERD40L60CTS Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

Diode Configuration:: 1 Pair Common Cathode

Technology:: FERD (Field Effect Rectifier Diode)

Voltage - DC Reverse (Vr) (Max):: 60 V

Current - Average Rectified (Io) (per Diode):: 20A

Voltage - Forward (Vf) (Max) @ If:: 545 mV @ 20 A

Speed:: No Recovery Time > 500mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 1.1 mA @ 60 V

Operating Temperature - Junction:: 150°C (Max)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

FERD40L60CTS FAQ

1.How can I place an order for FERD40L60CTS through Aetrix?

Please submit a Request for Quotation (RFQ) for FERD40L60CTS 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 FERD40L60CTS reliable?

The price and inventory of FERD40L60CTS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FERD40L60CTS is usually 5 days.

3.What payment methods are accepted for FERD40L60CTS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FERD40L60CTS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FERD40L60CTS?

FERD40L60CTS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FERD40L60CTS 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 FERD40L60CTS?

For technical support, including FERD40L60CTS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FERD40L60CTS requirements.

6.How does Aetrix verify that FERD40L60CTS is sourced from the original manufacturer or authorized distributors?

All FERD40L60CTS 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 FERD40L60CTS meets industry standards.

7.What is the process for return or replacement of FERD40L60CTS?

All FERD40L60CTS units undergo pre-shipment inspection (PSI). If there is an issue with FERD40L60CTS, 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 FERD40L60CTS part is unused and in its original packaging.

Return procedure for FERD40L60CTS:

1.Submit a request within 90 days.

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

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