FS1B-TP Equivalent & Substitute Parts

Part Overview

The FS1B-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 100 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (HSMA) package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating available packaging and supplier options.

Substiute Parts

FS1B-TP

Micro Commercial CoIn Stock: 3110FS1B-TP Datasheet

Current PartRFQ

RS2BA-13-F

Diodes IncorporatedIn Stock: 5243RS2BA-13-F Datasheet

SimilarRFQ

US1B-E3/61T

Vishay General Semiconductor - Diodes DivisionIn Stock: 62485US1B-E3/61T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FS1B-TP are selected based on the following critical electrical and mechanical parameters:

Mandatory Matching Criteria:

• Voltage - DC Reverse (Vr) (Max): 100 V minimum
• Current - Average Rectified (Io): 1 A minimum
• Mounting Type: Surface Mount
• Package / Case: DO-214AC or SMA compatible
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Acceptable Parameter Variations:

• Reverse Recovery Time (trr): Equal to or less than 150 ns
• Current - Reverse Leakage @ Vr: Equal to or less than 5 µA @ 100 V
• Operating Temperature - Junction: Range must encompass or exceed -50°C to 150°C
• Current - Average Rectified (Io): May exceed 1 A (higher current rating acceptable)

The substitute parts RS2BA-13-F and US1B-E3/61T satisfy these criteria while offering active product status and enhanced availability.

Parameter Comparison

Engineering Selection Recommendations

RS2BA-13-F (Diodes Incorporated): This substitute provides a 1.5 A current rating, exceeding the FS1B-TP specification of 1 A, while maintaining identical 100 V reverse voltage and 150 ns reverse recovery time. The part is active and widely available (5158 pcs in stock). Operating temperature range extends to -65°C, providing enhanced low-temperature performance. ROHS3 compliance and REACH unaffected status confirm regulatory alignment. The reduced capacitance (30 pF versus 50 pF) may provide improved high-frequency performance in switching applications.

US1B-E3/61T (Vishay General Semiconductor - Diodes Division): This substitute matches the FS1B-TP electrical specification exactly at 1 A average rectified current and 100 V reverse voltage. The part is active with substantial inventory availability (62425 pcs in stock). Reverse recovery time is reduced to 50 ns, providing superior switching performance compared to the 150 ns specification of the main part. Operating temperature range of -55°C to 150°C encompasses the FS1B-TP range. Capacitance is significantly reduced to 15 pF, beneficial for high-frequency applications. ROHS3 compliance and REACH unaffected status confirm regulatory alignment.

Both substitute parts maintain surface mount DO-214AC (SMA) package compatibility, MSL 1 rating, and export classification (EAR99) consistency with the original component.

Frequently Asked Questions (FAQ)

Q: Can RS2BA-13-F be used as a direct replacement for FS1B-TP?

A: Yes. RS2BA-13-F meets all mandatory electrical parameters: 100 V reverse voltage, 1.5 A average rectified current (exceeds 1 A requirement), fast recovery speed classification, and surface mount DO-214AC packaging. The part is active and RoHS3 compliant. The higher current rating provides design margin without compromising compatibility.

Q: Can US1B-E3/61T be used as a direct replacement for FS1B-TP?

A: Yes. US1B-E3/61T matches the FS1B-TP specification precisely: 100 V reverse voltage, 1 A average rectified current, fast recovery speed classification, and surface mount DO-214AC packaging. The part is active and RoHS3 compliant. The reduced reverse recovery time (50 ns versus 150 ns) provides improved switching performance.

Q: What is the difference between the two substitute parts?

A: RS2BA-13-F provides higher current capacity (1.5 A versus 1 A) with identical reverse recovery time (150 ns). US1B-E3/61T matches the current specification exactly but offers faster reverse recovery (50 ns) and lower capacitance (15 pF). Selection depends on circuit requirements for current margin versus switching speed optimization.

Q: Are the substitute parts available in the same packaging?

A: Both substitute parts use surface mount DO-214AC (SMA) packaging, identical to the FS1B-TP. RS2BA-13-F is supplied in Tape & Reel (TR) format. US1B-E3/61T is supplied in Tape & Reel (TR) format. Both are compatible with standard surface mount assembly processes.

Q: Do the substitute parts meet the same regulatory requirements?

A: Yes. Both RS2BA-13-F and US1B-E3/61T are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Both carry EAR99 export classification and 8541.10.0080 HTSUS code, matching the FS1B-TP. US1B-E3/61T additionally carries REACH unaffected status.

Q: What is the operating temperature range for each substitute?

A: FS1B-TP operates from -50°C to 150°C. RS2BA-13-F extends the low-temperature limit to -65°C. US1B-E3/61T operates from -55°C to 150°C. Both substitutes encompass or exceed the original temperature range.

Q: How do the reverse recovery times compare?

A: FS1B-TP specifies 150 ns reverse recovery time. RS2BA-13-F maintains 150 ns. US1B-E3/61T reduces this to 50 ns, providing faster switching transitions and reduced switching losses in high-frequency applications.

Q: What is the significance of capacitance differences?

A: FS1B-TP has 50 pF capacitance at 4V, 1MHz. RS2BA-13-F reduces this to 30 pF. US1B-E3/61T further reduces it to 15 pF. Lower capacitance reduces charge storage and improves performance in high-frequency switching circuits, though this difference is typically secondary to reverse recovery time in diode selection.