SRF1040 Equivalent & Substitute Parts

Part Overview

The SRF1040 is a Schottky diode array in a TO-220-3 Full Pack configuration with isolated tab, manufactured by Taiwan Semiconductor Corporation. This component features a 1 Pair Common Cathode configuration rated for 40 V DC reverse voltage and 10 A average rectified current per diode. The part is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical parameters are required for design flexibility, inventory management, or supply chain continuity while maintaining identical functional performance in the application circuit.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io) (per Diode)	10 A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 5 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Mounting Type	Through Hole
Package / Case	TO-220-3 Full Pack, Isolated Tab
Supplier Device Package	ITO-220AB
RoHS Status	RoHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SRF1040 are identified based on strict electrical and mechanical parameter equivalence. The following criteria determine substitution eligibility:

Critical Matching Parameters:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 40 V
Current - Average Rectified (Io) (per Diode): 10 A
Voltage - Forward (Vf) (Max) @ If: 550 mV @ 5 A
Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)
Mounting Type: Through Hole
Package / Case: TO-220-3 Full Pack
Supplier Device Package: ITO-220AB

The substitute part SB1040FCT_T0_00001 manufactured by Panjit International Inc. meets all critical electrical parameters and mechanical specifications required for direct substitution in applications designed for the SRF1040.

Parameter Comparison

Parameter	SRF1040 (Taiwan Semiconductor)	SB1040FCT_T0_00001 (Panjit International)	Match Status
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	Equivalent
Technology	Schottky	Schottky	Equivalent
Voltage - DC Reverse (Vr) (Max)	40 V	40 V	Equivalent
Current - Average Rectified (Io) (per Diode)	10 A	10 A	Equivalent
Voltage - Forward (Vf) (Max) @ If	550 mV @ 5 A	550 mV @ 5 A	Equivalent
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Equivalent
Current - Reverse Leakage @ Vr	500 µA @ 40 V	200 µA @ 40 V	Substitute Superior
Operating Temperature - Junction	-55°C ~ 125°C	-55°C ~ 150°C	Substitute Superior
Mounting Type	Through Hole	Through Hole	Equivalent
Package / Case	TO-220-3 Full Pack, Isolated Tab	TO-220-3 Full Pack	Equivalent
Supplier Device Package	ITO-220AB	ITO-220AB	Equivalent
RoHS Status	RoHS3 Compliant	RoHS3 Compliant	Equivalent
REACH Status	REACH Unaffected	REACH Unaffected	Equivalent

Engineering Selection Recommendations

Both the SRF1040 and SB1040FCT_T0_00001 are Active product status components with full RoHS3 compliance and REACH Unaffected designation, meeting current regulatory requirements for electronic component manufacturing and use.

The SB1040FCT_T0_00001 substitute part demonstrates equivalent performance across all critical electrical parameters while offering improved reverse leakage characteristics (200 µA versus 500 µA at 40 V) and extended maximum junction temperature rating (-55°C to 150°C versus -55°C to 125°C). These characteristics represent performance enhancements rather than deviations from the original specification.

Both components utilize identical TO-220-3 Full Pack ITO-220AB packaging with through-hole mounting, ensuring mechanical and thermal compatibility in existing PCB designs without layout modifications.

Selection between these parts is determined by supply availability, lead time requirements, and inventory management objectives, as electrical and mechanical substitution is complete.

Frequently Asked Questions (FAQ)

Q: Can the SB1040FCT_T0_00001 be used as a direct replacement for the SRF1040 in existing designs?

A: Yes. The SB1040FCT_T0_00001 meets all critical electrical specifications including 40 V reverse voltage rating, 10 A average rectified current, 550 mV forward voltage at 5 A, and fast recovery Schottky technology. Identical TO-220-3 Full Pack ITO-220AB packaging ensures mechanical and thermal compatibility without PCB redesign.

Q: Are there differences in reverse leakage current between these parts?

A: The SB1040FCT_T0_00001 specifies 200 µA reverse leakage at 40 V, compared to 500 µA for the SRF1040. This represents improved leakage performance in the substitute part and does not affect substitution eligibility.

Q: What is the temperature operating range difference?

A: The SRF1040 operates from -55°C to 125°C junction temperature, while the SB1040FCT_T0_00001 operates from -55°C to 150°C. The substitute part supports extended high-temperature operation and is suitable for applications requiring the full -55°C to 125°C range of the original part.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the SRF1040 and SB1040FCT_T0_00001 are RoHS3 compliant and REACH Unaffected, meeting current environmental and regulatory standards for electronic components.

Q: Is the isolated tab feature present on both parts?

A: The SRF1040 specifies TO-220-3 Full Pack with isolated tab. The SB1040FCT_T0_00001 specifies TO-220-3 Full Pack without explicit isolated tab notation. Both use the ITO-220AB supplier device package. Verify isolated tab requirement with application thermal design specifications before selection.

Q: What is the diode configuration for both parts?

A: Both parts feature 1 Pair Common Cathode Schottky diode configuration in a single package, suitable for bridge rectifier and dual-diode applications.

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