BA157GP-TP Equivalent & Substitute Parts

Part Overview

The BA157GP-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 400 V DC reverse voltage and 1 A average rectified current in a DO-41 through-hole package. This component is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Identifying equivalent and substitute parts is necessary for applications requiring continued support, legacy system maintenance, or when the primary part becomes unavailable.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	400 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A
Reverse Recovery Time (trr)	150 ns
Current - Reverse Leakage @ Vr	5 µA @ 400 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)
Package / Case	DO-204AL, DO-41, Axial
Mounting Type	Through Hole
Operating Temperature - Junction	-65°C ~ 150°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the BA157GP-TP is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 400 V
Current - Average Rectified (Io): 1 A
Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 1 A
Reverse Recovery Time (trr): 150 ns
Current - Reverse Leakage @ Vr: 5 µA @ 400 V
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
Package / Case: DO-204AL, DO-41, Axial
Mounting Type: Through Hole
Operating Temperature - Junction: -65°C ~ 150°C

Acceptable Variation Parameters:

Capacitance @ Vr, F: Minor variations permitted (10pF to 50pF @ 4V, 1MHz)
Packaging Format: Tape & Reel (TR) or Cut Tape (CT) acceptable for equivalent electrical performance

All substitute parts listed maintain full electrical and mechanical compatibility with the BA157GP-TP within the specified parameter ranges.

Parameter Comparison

Parameter	BA157GP-TP (Main)	FR104G B0G	FR104T/R	PR1004G-T	UF1004-T
Manufacturer	Micro Commercial Co	Taiwan Semiconductor Corporation	EIC SEMICONDUCTOR INC.	Diodes Incorporated	Diodes Incorporated
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	1 A	1 A	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A	1.3 V @ 1 A	1.3 V @ 1 A	1.3 V @ 1 A	1.3 V @ 1 A
Reverse Recovery Time (trr)	150 ns	150 ns	150 ns	150 ns	50 ns
Current - Reverse Leakage @ Vr	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V
Capacitance @ Vr, F	15pF @ 4V, 1MHz	10pF @ 4V, 1MHz	50pF @ 4V, 1MHz	15pF @ 4V, 1MHz	20pF @ 4V, 1MHz
Package / Case	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Operating Temperature - Junction	-65°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C
Product Status	Not For New Designs	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Full Electrical and Thermal Equivalence):

The FR104T/R, PR1004G-T, and UF1004-T are direct parametric equivalents to the BA157GP-TP. All three parts maintain identical voltage, current, and leakage specifications with matching operating temperature ranges (-65°C ~ 150°C). All substitute parts carry Active product status, ensuring continued availability and manufacturer support. All parts are ROHS3 compliant and suitable for applications requiring regulatory compliance.

Secondary Substitute (Thermal Consideration):

The FR104G B0G from Taiwan Semiconductor Corporation is electrically equivalent but operates within a reduced temperature range (-55°C ~ 150°C versus -65°C ~ 150°C). This part is suitable for applications where the lower temperature limit of -55°C is acceptable. This part carries Active product status and ROHS3 compliance.

Reverse Recovery Time Consideration:

The UF1004-T exhibits a faster reverse recovery time of 50 ns compared to the BA157GP-TP specification of 150 ns. This faster recovery characteristic is compatible with the BA157GP-TP application and does not introduce incompatibility. The UF1004-T is available in Cut Tape (CT) packaging format.

All substitute parts are manufactured by established semiconductor suppliers with Active product status, ensuring long-term availability and supply chain stability for legacy system support.

Frequently Asked Questions (FAQ)

Q: Can the FR104G B0G be used as a direct replacement for the BA157GP-TP in all applications?

A: The FR104G B0G is electrically equivalent across all critical parameters. However, it operates within a reduced junction temperature range of -55°C ~ 150°C compared to the BA157GP-TP range of -65°C ~ 150°C. Applications requiring operation below -55°C must use FR104T/R, PR1004G-T, or UF1004-T instead.

Q: What is the significance of the different reverse recovery times listed for the UF1004-T?

A: The UF1004-T has a reverse recovery time of 50 ns, which is faster than the BA157GP-TP specification of 150 ns. Faster recovery time is a performance enhancement that does not compromise compatibility. The UF1004-T can be substituted without circuit redesign.

Q: Are all substitute parts available in the same packaging formats as the BA157GP-TP?

A: The BA157GP-TP is supplied in Tape & Reel (TR) format. The FR104T/R and PR1004G-T are available in Tape & Reel (TR) format. The UF1004-T is available in Cut Tape (CT) format. All parts use the same DO-41 through-hole package and are mechanically compatible with existing PCB designs.

Q: Do all substitute parts meet the same compliance standards as the BA157GP-TP?

A: All substitute parts listed are ROHS3 compliant and carry REACH Unaffected status, matching the BA157GP-TP compliance profile. All parts are suitable for applications requiring regulatory compliance with current environmental standards.

Q: What is the difference between parametric equivalents and similar manufacturer parts?

A: Parametric equivalents (FR104T/R, PR1004G-T, UF1004-T) maintain identical electrical specifications across all critical parameters. Similar manufacturer parts (FR104G B0G) meet the same electrical requirements but may have minor variations in secondary parameters such as operating temperature range. Both categories are suitable for substitution within their specified parameter ranges.

Q: Can capacitance variations between substitute parts affect circuit performance?

A: The capacitance variations listed (10pF to 50pF @ 4V, 1MHz) are within acceptable ranges for general-purpose rectifier applications. These variations do not affect the primary rectification function and are compatible with standard circuit designs using the BA157GP-TP.

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