FR156S-AP Equivalent & Substitute Parts

Part Overview

The FR156S-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 800 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 active equivalent parts to maintain design continuity and ensure supply chain availability for new production and repair applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 1.5	V @ A
Reverse Recovery Time (trr)	500	ns
Current - Reverse Leakage @ Vr	5	µA @ 800 V
Capacitance @ Vr, F	20	pF @ 4V, 1MHz
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Through Hole	—
Technology	Standard	—

Substitute Part Grouping Explanation

Substitution of the FR156S-AP is determined by electrical parameter equivalence and mechanical compatibility. The primary substitution criterion is matching of the following parameters:

Voltage - DC Reverse (Vr) (Max): 800 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 @ 800 V
Operating Temperature - Junction: -55°C to 150°C
Technology: Standard
Mounting Type: Through Hole

The FR156GP-AP meets all electrical specifications identical to the FR156S-AP. The primary difference is the package configuration: FR156GP-AP uses DO-15 (DO-204AC) axial packaging versus the DO-41 (DO-204AL) axial packaging of the FR156S-AP. Both are axial through-hole packages with compatible lead spacing for PCB mounting applications where package footprint accommodation is feasible.

Parameter Comparison

Parameter	FR156S-AP (Main Part)	FR156GP-AP (Substitute)	Match Status
Manufacturer	Micro Commercial Co	Micro Commercial Co	Identical
Category	Diodes, Rectifiers	Diodes, Rectifiers	Identical
Voltage - DC Reverse (Vr) (Max)	800 V	800 V	Identical
Current - Average Rectified (Io)	1.5 A	1.5 A	Identical
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1.5 A	1.3 V @ 1.5 A	Identical
Reverse Recovery Time (trr)	500 ns	500 ns	Identical
Current - Reverse Leakage @ Vr	5 µA @ 800 V	5 µA @ 800 V	Identical
Capacitance @ Vr, F	20 pF @ 4V, 1MHz	20 pF @ 4V, 1MHz	Identical
Operating Temperature - Junction	-55°C to 150°C	-55°C to 150°C	Identical
Mounting Type	Through Hole	Through Hole	Identical
Technology	Standard	Standard	Identical
Package / Case	DO-204AL, DO-41, Axial	DO-204AC, DO-15, Axial	Different Package
Product Status	Obsolete	Active	Substitute is Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Identical
ECCN	EAR99	EAR99	Identical
HTSUS	8541.10.0080	8541.10.0080	Identical

Engineering Selection Recommendations

The FR156GP-AP is an active equivalent substitute for the obsolete FR156S-AP. All electrical parameters, thermal ratings, and compliance certifications are identical. The substitute part maintains ROHS3 compliance and carries identical export classification (EAR99) and tariff codes (HTSUS 8541.10.0080).

The primary consideration for substitution is the package transition from DO-41 to DO-15 axial through-hole configuration. Both packages are axial lead formats suitable for through-hole PCB mounting. Design integration requires verification that the DO-15 package dimensions accommodate the existing PCB footprint and mechanical clearance requirements of the application.

The FR156GP-AP is currently in active production status with confirmed inventory availability, ensuring supply chain continuity for ongoing procurement requirements.

Frequently Asked Questions (FAQ)

Q: What is the primary difference between FR156S-AP and FR156GP-AP?

A: The parts are electrically identical with all specifications matching. The difference is the package configuration: FR156S-AP uses DO-41 (DO-204AL) packaging, while FR156GP-AP uses DO-15 (DO-204AC) packaging. Both are axial through-hole packages.

Q: Can FR156GP-AP be used as a direct replacement for FR156S-AP?

A: Electrical substitution is valid. Physical substitution requires PCB layout accommodation for the DO-15 package dimensions. Verify that the existing DO-41 footprint can accept the DO-15 package or that PCB redesign is feasible.

Q: Are the electrical specifications identical between these parts?

A: Yes. Voltage rating (800 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 @ 800 V), and operating temperature range (-55°C to 150°C) are identical.

Q: What is the compliance status of the substitute part?

A: FR156GP-AP is ROHS3 compliant with MSL rating of 1 (Unlimited). Export classification is EAR99 and tariff code is HTSUS 8541.10.0080, matching the original part.

Q: Why is FR156S-AP listed as obsolete?

A: FR156S-AP is classified as obsolete by the manufacturer. FR156GP-AP is the active equivalent in the product line, ensuring continued availability and supply chain support.

Q: Are there any thermal or performance differences?

A: No. Operating temperature range, reverse recovery characteristics, and all thermal parameters are identical between the two parts.

Q: What should be verified before implementing the substitution?

A: Confirm that the DO-15 package footprint is compatible with the PCB layout. Verify mechanical clearance for component placement and any adjacent components. Ensure lead spacing and hole diameter specifications match PCB design parameters.

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