FR3B-TP Equivalent & Substitute Parts

Part Overview

The FR3B-TP is a fast recovery rectifier diode manufactured by Micro Commercial Co, rated for 100 V DC reverse voltage and 3 A average rectified current in a surface mount DO-214AB (SMC) package. This component is designed for general-purpose rectification applications requiring fast switching characteristics. The part is currently active in production with 711 pieces in stock.

Substitute parts are identified to provide design flexibility when the primary part is unavailable, when alternative packaging formats are required, or when application parameters permit operation with higher current ratings or different recovery characteristics.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 3 A	V
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	10 @ 100 V	µA
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C

Substitute Part Grouping Explanation

Substitution of the FR3B-TP is permissible when the following conditions are met:

Mandatory Compatibility Criteria:

Voltage - DC Reverse (Vr) rating must equal or exceed 100 V
Package / Case must be DO-214AB (SMC) surface mount
Operating temperature range must encompass -55°C to 150°C junction temperature
Current - Average Rectified (Io) rating must equal or exceed the application requirement (minimum 3 A for direct replacement)

Allowable Parameter Variations:

Current - Average Rectified (Io) may exceed 3 A (higher current capability is acceptable)
Voltage - Forward (Vf) may differ within the specified operating point
Reverse Recovery Time (trr) may vary (fast recovery ≤500 ns or standard recovery >500 ns)
Current - Reverse Leakage may be equal to or lower than specified
Capacitance @ Vr may vary

The substitute part S5B-E3/57T meets all mandatory criteria and is therefore qualified as an equivalent component.

Parameter Comparison

Parameter	FR3B-TP (Main Part)	S5B-E3/57T (Substitute)	Unit
Manufacturer	Micro Commercial Co	Vishay General Semiconductor - Diodes Division	—
Voltage - DC Reverse (Vr) (Max)	100	100	V
Current - Average Rectified (Io)	3	5	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 3 A	1.15 @ 5 A	V
Speed Classification	Fast Recovery ≤500 ns, >200 mA	Standard Recovery >500 ns, >200 mA	—
Reverse Recovery Time (trr)	150	2.5	ns / µs
Current - Reverse Leakage @ Vr	10 @ 100 V	10 @ 100 V	µA
Capacitance @ Vr, F	80 @ 4 V, 1 MHz	40 @ 4 V, 1 MHz	pF
Package / Case	DO-214AB, SMC	DO-214AB, SMC	—
Mounting Type	Surface Mount	Surface Mount	—
Operating Temperature - Junction	-55 to 150	-55 to 150	°C
Product Status	Active	Active	—
Packaging Format	Bulk	Tape & Reel (TR)	—

Engineering Selection Recommendations

FR3B-TP Selection Criteria:

Primary choice when fast recovery characteristics (150 ns trr) are required
Suitable for applications sensitive to switching speed and electromagnetic interference
Available in bulk packaging format
Micro Commercial Co product with REACH Unaffected status

S5B-E3/57T Selection Criteria:

Qualified substitute when current rating of 5 A accommodates application requirements
Standard recovery characteristics (2.5 µs trr) acceptable for lower-frequency switching applications
Available in Tape & Reel packaging format for automated assembly
Vishay General Semiconductor product with RoHS3 Compliance and REACH Unaffected status
Higher inventory availability (30,200 pieces in stock)

Both parts share identical voltage ratings, reverse leakage characteristics, operating temperature range, and DO-214AB package geometry. Selection between these parts depends on recovery speed requirements and packaging format preference.

Frequently Asked Questions (FAQ)

Q: Can S5B-E3/57T directly replace FR3B-TP in all applications?

A: S5B-E3/57T is a qualified substitute when the application current requirement does not exceed 5 A and when standard recovery time (2.5 µs) is acceptable. If the circuit requires fast recovery characteristics (≤500 ns), FR3B-TP is the appropriate selection. Both parts are rated for identical 100 V reverse voltage and operate across the same temperature range.

Q: What is the difference in recovery time between these parts?

A: FR3B-TP has a reverse recovery time of 150 ns (fast recovery classification). S5B-E3/57T has a reverse recovery time of 2.5 µs (standard recovery classification). Fast recovery diodes minimize switching losses and reduce EMI in high-frequency applications. Standard recovery diodes are suitable for lower-frequency rectification circuits.

Q: Are the packages identical?

A: Both parts use the DO-214AB (SMC) surface mount package with identical physical dimensions and pin configuration. The primary difference is packaging format: FR3B-TP is supplied in bulk, while S5B-E3/57T is supplied in Tape & Reel format for automated pick-and-place assembly.

Q: What is the significance of the current rating difference?

A: FR3B-TP is rated for 3 A average rectified current, while S5B-E3/57T is rated for 5 A. A higher current rating provides additional design margin and thermal headroom. S5B-E3/57T can be used in applications requiring up to 5 A without derating. For applications requiring exactly 3 A or less, both parts are suitable.

Q: Are there compliance or regulatory differences?

A: Both parts carry REACH Unaffected status. S5B-E3/57T additionally carries RoHS3 Compliance certification with Moisture Sensitivity Level 1 (Unlimited). Both parts are classified under ECCN EAR99 and HTSUS 8541.10.0080.

Q: What forward voltage difference exists between these parts?

A: FR3B-TP has a maximum forward voltage of 1.3 V at 3 A. S5B-E3/57T has a maximum forward voltage of 1.15 V at 5 A. The lower forward voltage in S5B-E3/57T results in reduced power dissipation at equivalent current levels, contributing to improved thermal performance.

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