USB260-E3/52T Equivalent & Substitute Parts

Part Overview

The USB260-E3/52T is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 600 V DC reverse voltage and 2 A average rectified current in a DO-214AA (SMB) surface mount package. This part is classified as obsolete, which necessitates identification of active equivalent and substitute components for ongoing design support and procurement.

The USB260-E3/52T features fast recovery characteristics with a reverse recovery time of 30 ns, making it suitable for applications requiring rapid switching performance. The part is RoHS3 compliant and carries unlimited moisture sensitivity level (MSL 1), indicating robust handling characteristics for manufacturing environments.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	600	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) Maximum @ If	1.6 @ 2 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	30	ns
Current - Reverse Leakage @ Vr	5 µA @ 600 V	µA
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the USB260-E3/52T is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) rating must equal or exceed 600 V
Current - Average Rectified (Io) rating must equal or exceed 2 A
Package / Case must be DO-214AA (SMB) surface mount
Speed classification must support fast recovery characteristics (≤ 500ns for Io > 200mA)
Operating temperature range must encompass the application requirements

Substitution Categories:

Direct Equivalents (Identical Electrical and Mechanical Specifications): Parts USB260-M3/52T, USB260-M3/5BT, USB260HM3/52T, and USB260HM3/5BT are direct parametric equivalents manufactured by Vishay General Semiconductor - Diodes Division. These parts maintain identical voltage, current, and recovery time specifications. Differences exist only in packaging format (Cut Tape vs. Tape & Reel) and product grade (standard vs. automotive AEC-Q101 qualified).

Parametric Equivalents (Matching Core Electrical Specifications): Parts STTH2R06U and STTH2L06U from STMicroelectronics meet the 600 V / 2 A electrical requirements with fast recovery characteristics. These parts are fully compatible from an electrical standpoint, though minor variations exist in forward voltage and reverse recovery time within acceptable operating margins.

Functional Alternatives (Higher Voltage or Current Ratings): Parts S3KB and S3KB-13-F from Taiwan Semiconductor Corporation and Diodes Incorporated respectively provide 800 V / 3 A ratings, exceeding the USB260-E3/52T specifications. These components function as drop-in replacements for applications where higher voltage or current margins are acceptable, though they employ standard recovery characteristics rather than fast recovery.

Limited Current Alternatives (Lower Current Ratings): Parts STTH1R06U and STTH1L06U from STMicroelectronics are rated for 600 V / 1 A. These components are suitable only for applications where the actual circuit current requirement does not exceed 1 A, despite the original design specification of 2 A.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Status	Grade
USB260-E3/52T	Vishay	600	2	1.6 @ 2A	Fast Recovery ≤ 500ns	30	5 @ 600V	DO-214AA (SMB)	Obsolete	Standard
USB260-M3/52T	Vishay	600	2	1.6 @ 2A	Fast Recovery ≤ 500ns	30	5 @ 600V	DO-214AA (SMB)	Active	Standard
USB260-M3/5BT	Vishay	600	2	1.6 @ 2A	Fast Recovery ≤ 500ns	30	5 @ 600V	DO-214AA (SMB)	Active	Standard
USB260HM3/52T	Vishay	600	2	1.6 @ 2A	Fast Recovery ≤ 500ns	30	5 @ 600V	DO-214AA (SMB)	Active	Automotive (AEC-Q101)
USB260HM3/5BT	Vishay	600	2	1.6 @ 2A	Fast Recovery ≤ 500ns	30	5 @ 600V	DO-214AA (SMB)	Active	Automotive (AEC-Q101)
STTH2R06U	STMicroelectronics	600	2	1.7 @ 2A	Fast Recovery ≤ 500ns	50	2 @ 600V	DO-214AA (SMB)	Active	Standard
STTH2L06U	STMicroelectronics	600	2	1.3 @ 2A	Fast Recovery ≤ 500ns	85	2 @ 600V	DO-214AA (SMB)	Active	Standard
S3KB	Taiwan Semiconductor Corporation	800	3	1.15 @ 3A	Standard Recovery > 500ns	1500	10 @ 800V	DO-214AA (SMB)	Active	Standard
S3KB-13-F	Diodes Incorporated	800	3	1.15 @ 3A	Standard Recovery > 500ns	—	10 @ 800V	DO-214AA (SMB)	Active	Standard
STTH1R06U	STMicroelectronics	600	1	1.7 @ 1A	Fast Recovery ≤ 500ns	45	1 @ 600V	DO-214AA (SMB)	Active	Standard
STTH1L06U	STMicroelectronics	600	1	1.3 @ 1A	Fast Recovery ≤ 500ns	80	1 @ 600V	DO-214AA (SMB)	Active	Standard

Engineering Selection Recommendations

Recommended Primary Substitutes:

For applications requiring direct replacement with identical electrical and mechanical specifications, USB260-M3/52T or USB260-M3/5BT are the preferred choices. Both parts are manufactured by Vishay General Semiconductor - Diodes Division and maintain the exact electrical characteristics of the obsolete USB260-E3/52T. Selection between these two depends on packaging requirements: USB260-M3/52T is supplied in Cut Tape format, while USB260-M3/5BT is supplied in Tape & Reel format.

For automotive applications or designs requiring AEC-Q101 qualification, USB260HM3/52T or USB260HM3/5BT provide identical electrical performance with automotive-grade qualification. These parts are suitable for replacement in automotive and industrial applications where component traceability and qualification documentation are required.

Secondary Substitutes:

STTH2R06U and STTH2L06U from STMicroelectronics are parametric equivalents that meet the 600 V / 2 A electrical requirements. STTH2L06U offers superior forward voltage characteristics (1.3 V vs. 1.6 V @ 2 A), which may reduce power dissipation in applications with high switching frequency. STTH2R06U maintains closer forward voltage alignment with the original part (1.7 V vs. 1.6 V @ 2 A). Both parts are RoHS3 compliant and carry MSL 1 rating.

Functional Alternatives:

S3KB and S3KB-13-F provide higher voltage (800 V) and current (3 A) ratings, suitable for applications where design margins exceed the original 600 V / 2 A specification. These parts employ standard recovery characteristics (> 500ns) rather than fast recovery, which may impact switching performance in high-frequency applications. Selection of these alternatives is appropriate only when circuit analysis confirms compatibility with standard recovery characteristics.

Not Recommended for Direct Substitution:

STTH1R06U and STTH1L06U are rated for 1 A maximum current and are unsuitable for applications requiring the full 2 A capability of the USB260-E3/52T. These parts may be used only in circuit designs where actual operating current does not exceed 1 A.

Frequently Asked Questions (FAQ)

Q: Can USB260-M3/52T and USB260-M3/5BT be used interchangeably with USB260-E3/52T?

A: Yes. Both parts are direct parametric equivalents with identical electrical specifications (600 V, 2 A, 30 ns reverse recovery time, 1.6 V forward voltage @ 2 A). The only difference is packaging format: USB260-M3/52T is supplied in Cut Tape, while USB260-M3/5BT is supplied in Tape & Reel. Selection depends on manufacturing equipment and procurement requirements.

Q: What is the difference between USB260-M3/52T and USB260HM3/52T?

A: Both parts are electrically identical with 600 V / 2 A ratings and 30 ns reverse recovery time. USB260HM3/52T carries automotive-grade qualification (AEC-Q101) and is designated for automotive applications. USB260-M3/52T is standard-grade. Selection depends on application requirements and qualification documentation needs.

Q: Can STTH2R06U replace USB260-E3/52T in all applications?

A: STTH2R06U meets the core electrical requirements (600 V, 2 A, fast recovery ≤ 500ns). However, forward voltage is 1.7 V versus 1.6 V for the original part, and reverse recovery time is 50 ns versus 30 ns. These differences are within typical operating margins for most applications but should be verified through circuit analysis for high-frequency or high-efficiency designs.

Q: Why are S3KB and S3KB-13-F listed as substitutes if they have different voltage and current ratings?

A: S3KB and S3KB-13-F provide higher voltage (800 V) and current (3 A) ratings, making them functional alternatives for applications where the original 600 V / 2 A specification provides insufficient design margin. These parts are suitable only when circuit analysis confirms that standard recovery characteristics (> 500ns) are acceptable for the application.

Q: What does "Fast Recovery ≤ 500ns, > 200mA (Io)" mean?

A: This specification indicates that the diode exhibits fast recovery characteristics with reverse recovery time of 500 nanoseconds or less when the forward current exceeds 200 milliamps. This parameter is critical for switching applications where rapid diode turn-off is required to minimize switching losses and electromagnetic interference.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All parts listed in this reference document carry RoHS3 compliance certification. All parts also carry MSL 1 (Unlimited) moisture sensitivity level, indicating robust handling characteristics suitable for standard manufacturing environments.

Q: Can STTH1R06U or STTH1L06U be used as substitutes?

A: STTH1R06U and STTH1L06U are rated for 1 A maximum current, which is below the 2 A specification of USB260-E3/52T. These parts are suitable only for applications where actual operating current does not exceed 1 A. Use of these parts in circuits designed for 2 A operation will result in component overstress and potential failure.

Q: What is the significance of the "Capacitance @ Vr, F" parameter?

A: Capacitance at reverse voltage affects switching speed and high-frequency performance. USB260-E3/52T does not specify this parameter. Substitute parts from Vishay (USB260-M3 series) and STMicroelectronics (STTH series) specify 45 pF @ 4V, 1MHz, while S3KB series specifies 40 pF @ 4V, 1MHz. These values are comparable and do not significantly impact substitution decisions for most applications.

Q: How should packaging format (Cut Tape vs. Tape & Reel) be selected?

A: Packaging format selection depends on manufacturing equipment and procurement volume. Cut Tape format is suitable for lower-volume applications and manual assembly. Tape & Reel format is required for automated pick-and-place assembly equipment. Electrical performance is identical between packaging formats of the same part number.

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