FR1B-TP Equivalent & Substitute Parts

Part Overview

The FR1B-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 DO-214AA (SMB) surface mount package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design and procurement requirements. Equivalent parts maintain identical electrical specifications, while substitute parts provide functional alternatives with modified performance characteristics within acceptable application parameters.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	5	µA @ 100 V
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-50 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the FR1B-TP is determined by the following critical parameters:

Parametric Equivalents (FR1B, FR1B_R1_00001): Parts that maintain identical or functionally equivalent electrical specifications across voltage rating, current rating, forward voltage drop, recovery time, and reverse leakage characteristics. These parts are pin-compatible in the DO-214AA (SMB) package and operate within the same temperature range.

Functional Substitutes (ES3BB-13-F): Parts that share the same voltage rating (100 V) and package form factor but differ in current capacity (3 A versus 1 A) and associated electrical characteristics. These parts are suitable for applications where higher current capability is acceptable or required, provided circuit design accommodates the modified electrical parameters.

The following parameters establish substitution validity:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 100 V
Package / Case: Must be DO-214AA or SMB compatible
Mounting Type: Must be Surface Mount
RoHS Status: Must maintain ROHS3 compliance
Moisture Sensitivity Level: Must be MSL 1 or equivalent

Parameter Comparison

Parameter	FR1B-TP (Main)	FR1B (SMC)	FR1B_R1_00001 (Panjit)	ES3BB-13-F (Diodes Inc.)
Manufacturer	Micro Commercial Co	SMC Diode Solutions	Panjit International Inc.	Diodes Incorporated
Product Status	Obsolete	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	100 V	100 V	100 V	100 V
Current - Average Rectified (Io)	1 A	1 A	1 A	3 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A	1.3 V @ 1 A	1.3 V @ 1 A	900 mV @ 3 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Reverse Recovery Time (trr)	150 ns	150 ns	150 ns	25 ns
Current - Reverse Leakage @ Vr	5 µA @ 100 V	5 µA @ 100 V	1 µA @ 100 V	10 µA @ 100 V
Capacitance @ Vr, F	15 pF @ 4V, 1MHz	10 pF @ 4V, 1MHz	12 pF @ 4V, 1MHz	45 pF @ 4V, 1MHz
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Operating Temperature - Junction	-50 to 150 °C	-50 to 150 °C	-50 to 150 °C	-55 to 150 °C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Affected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Parametric Equivalent Selection (FR1B or FR1B_R1_00001)

The FR1B manufactured by SMC Diode Solutions and the FR1B_R1_00001 manufactured by Panjit International Inc. are direct parametric equivalents to the obsolete FR1B-TP. Both parts maintain identical voltage and current ratings, forward voltage characteristics, and recovery time specifications. Selection between these two equivalents is based on:

FR1B (SMC Diode Solutions): Active product status with ROHS3 compliance. REACH status is listed as affected, requiring verification of supply chain compliance requirements for specific applications or regions.
FR1B_R1_00001 (Panjit International Inc.): Active product status with ROHS3 compliance and REACH unaffected status. Reverse leakage current is superior at 1 µA versus 5 µA, providing enhanced performance in low-leakage applications. Capacitance specification (12 pF) falls between the main part and SMC equivalent.

Functional Substitute Selection (ES3BB-13-F)

The ES3BB-13-F manufactured by Diodes Incorporated is a functional substitute suitable for applications where increased current capacity is acceptable. This part maintains the 100 V voltage rating and DO-214AA package compatibility but provides 3 A current capacity. Key distinctions include:

Significantly improved reverse recovery time (25 ns versus 150 ns), beneficial for high-frequency switching applications
Lower forward voltage drop at rated current (900 mV @ 3 A), reducing power dissipation
Higher reverse leakage current (10 µA) and capacitance (45 pF), which may impact performance in sensitive analog circuits
Extended operating temperature range (-55 to 150 °C)

The ES3BB-13-F is appropriate for designs requiring higher current margins or improved switching performance, provided circuit topology accommodates the modified electrical characteristics.

Frequently Asked Questions (FAQ)

Q: Can FR1B-TP be directly replaced with FR1B or FR1B_R1_00001?

A: Yes. Both FR1B (SMC Diode Solutions) and FR1B_R1_00001 (Panjit International Inc.) are parametric equivalents with identical voltage, current, and package specifications. Direct substitution is supported without circuit modification.

Q: What is the difference between the FR1B from SMC and the FR1B_R1_00001 from Panjit?

A: Both parts share identical electrical ratings. The FR1B_R1_00001 exhibits lower reverse leakage current (1 µA versus 5 µA) and REACH unaffected status. Selection depends on application sensitivity to leakage current and regional compliance requirements.

Q: Can ES3BB-13-F replace FR1B-TP in all applications?

A: ES3BB-13-F is a functional substitute with higher current capacity (3 A versus 1 A) and improved switching characteristics (25 ns recovery time versus 150 ns). It is suitable for applications where increased current capability is acceptable. However, higher capacitance (45 pF) and reverse leakage (10 µA) may affect performance in precision analog or low-noise circuits. Circuit validation is required for sensitive applications.

Q: Are all substitute parts available in the same package?

A: Yes. All listed parts use the DO-214AA (SMB) surface mount package, ensuring mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Q: What compliance certifications apply to these parts?

A: All parts maintain ROHS3 compliance. FR1B-TP and FR1B_R1_00001 are REACH unaffected. FR1B (SMC) is REACH affected. All parts are classified as EAR99 for export control purposes.

Q: Which substitute part should be selected for new designs?

A: For new designs requiring 1 A capacity, FR1B_R1_00001 (Panjit) is recommended due to active product status, superior reverse leakage characteristics, and REACH unaffected designation. For applications requiring higher current capacity or improved switching speed, ES3BB-13-F (Diodes Incorporated) is appropriate with circuit validation.

Q: What is the moisture sensitivity level for these parts?

A: All listed parts are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage, handling, or assembly processes.

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