FR157S-AP Equivalent & Substitute Parts

Part Overview

The FR157S-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 1000 V DC reverse voltage and 1.5 A average rectified current in a DO-41 axial through-hole package. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity. Substitute parts must maintain electrical performance specifications while accommodating package form factor variations in circuit board layouts.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1.5 A	V
Reverse Recovery Time (trr)	500	ns
Current - Reverse Leakage @ Vr	5	µA @ 1000 V
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	DO-41	—
Technology	Standard	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the FR157S-AP is determined by equivalence across the following critical electrical parameters:

Voltage - DC Reverse (Vr) (Max): 1000 V
Current - Average Rectified (Io): 1.5 A
Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 1.5 A
Reverse Recovery Time (trr): 500 ns
Current - Reverse Leakage @ Vr: 5 µA @ 1000 V
Operating Temperature - Junction: -55°C to 150°C
Technology: Standard
RoHS Status: ROHS3 Compliant

The FR157GP-AP qualifies as a direct electrical substitute, maintaining identical electrical performance specifications. The primary distinction is the package form factor: DO-15 (axial) versus DO-41 (axial). Both packages are through-hole axial configurations suitable for printed circuit board insertion, with mechanical compatibility dependent on board layout hole spacing and component lead diameter specifications.

Parameter Comparison

Parameter	FR157S-AP (Main Part)	FR157GP-AP (Substitute)	Match
Manufacturer	Micro Commercial Co	Micro Commercial Co	Yes
Category	Diodes, Rectifiers	Diodes, Rectifiers	Yes
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	Yes
Current - Average Rectified (Io)	1.5 A	1.5 A	Yes
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1.5 A	1.3 V @ 1.5 A	Yes
Reverse Recovery Time (trr)	500 ns	500 ns	Yes
Current - Reverse Leakage @ Vr	5 µA @ 1000 V	5 µA @ 1000 V	Yes
Capacitance @ Vr, F	20 pF @ 4V, 1MHz	20 pF @ 4V, 1MHz	Yes
Operating Temperature - Junction	-55°C to 150°C	-55°C to 150°C	Yes
Technology	Standard	Standard	Yes
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Yes
Mounting Type	Through Hole	Through Hole	Yes
Package / Case	DO-41	DO-15	No
Product Status	Obsolete	Active	Different

Engineering Selection Recommendations

The FR157GP-AP is electrically equivalent to the FR157S-AP across all specified performance parameters. The substitute part carries Active product status, ensuring ongoing availability and manufacturing support, whereas the main part is classified as Obsolete.

Both parts maintain ROHS3 compliance and identical electrical characteristics including reverse voltage rating, forward voltage drop, reverse recovery time, and leakage current specifications. The FR157GP-AP is manufactured by the same supplier (Micro Commercial Co) and shares the same base product number (FR157).

Selection of the FR157GP-AP requires verification of mechanical compatibility with existing printed circuit board layouts, specifically hole spacing and lead diameter accommodation for the DO-15 package form factor. The electrical performance of the circuit remains unchanged upon substitution.

Frequently Asked Questions (FAQ)

Q: Can the FR157GP-AP directly replace the FR157S-AP in all applications?

A: The FR157GP-AP provides electrical equivalence across all specified parameters. Physical board layout compatibility must be confirmed, as the DO-15 package differs from the DO-41 package in physical dimensions and lead configuration, despite both being axial through-hole formats.

Q: What is the primary reason for substituting the FR157S-AP?

A: The FR157S-AP is classified as Obsolete. The FR157GP-AP is an Active product from the same manufacturer with identical electrical specifications, providing procurement continuity and manufacturing support.

Q: Are there compliance differences between the two parts?

A: Both parts are ROHS3 compliant with identical Moisture Sensitivity Level (MSL) ratings of 1 (Unlimited). No compliance disadvantage exists in selecting the substitute part.

Q: What are the key electrical parameters that must match for substitution?

A: Substitution requires equivalence in voltage rating (1000 V), current rating (1.5 A), forward voltage drop (1.3 V @ 1.5 A), reverse recovery time (500 ns), reverse leakage current (5 µA @ 1000 V), and operating temperature range (-55°C to 150°C).

Q: Does package form factor affect circuit performance?

A: Package form factor (DO-41 versus DO-15) affects physical board layout and mechanical installation only. Electrical circuit performance remains identical when electrical parameters are matched.

Q: What inventory status should influence procurement decisions?

A: The FR157GP-AP maintains 766 pieces in new original stock with Active product status, ensuring reliable long-term availability compared to the Obsolete FR157S-AP.

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