RL201GP-AP Equivalent & Substitute Parts

Part Overview

The RL201GP-AP is a general-purpose rectifier diode rated for 50 V DC reverse voltage and 2 A average rectified current in a DO-15 through-hole axial package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent substitute parts is necessary for ongoing maintenance, repair, and legacy system support where this diode remains in active use.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	1	V @ 2 A
Current - Reverse Leakage @ Vr	5	µA @ 50 V
Operating Temperature - Junction	-55 to 150	°C
Package / Case	DO-204AC, DO-15, Axial	—
Mounting Type	Through Hole	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the RL201GP-AP are selected based on strict electrical and mechanical parameter matching within the general-purpose rectifier diode category. The following criteria determine substitution eligibility:

Electrical Parameters (Must Match or Exceed):

Voltage - DC Reverse (Vr) (Max): 50 V minimum
Current - Average Rectified (Io): 2 A minimum
Operating Temperature - Junction: -55°C to 150°C minimum range
Current - Reverse Leakage @ Vr: 5 µA @ 50 V maximum

Mechanical Parameters (Must Match):

Package / Case: DO-204AC, DO-15, Axial
Mounting Type: Through Hole

Compliance Parameters (Must Match or Exceed):

RoHS Status: ROHS3 Compliant

Parts meeting these criteria are functionally interchangeable in applications where the RL201GP-AP was originally specified.

Parameter Comparison

Parameter	RL201GP-AP (Main Part)	SF21GHA0G (Substitute)	Match Status
Manufacturer	Micro Commercial Co	Taiwan Semiconductor Corporation	Different
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	Match
Current - Average Rectified (Io)	2 A	2 A	Match
Voltage - Forward (Vf) (Max) @ If	1 V @ 2 A	950 mV @ 2 A	Substitute Lower
Current - Reverse Leakage @ Vr	5 µA @ 50 V	5 µA @ 50 V	Match
Operating Temperature - Junction	-55°C to 150°C	-55°C to 150°C	Match
Package / Case	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial	Match
Mounting Type	Through Hole	Through Hole	Match
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Match
Product Status	Not For New Designs	Active	Substitute Active

Engineering Selection Recommendations

The SF21GHA0G from Taiwan Semiconductor Corporation qualifies as a direct substitute for the RL201GP-AP based on matching electrical ratings, package configuration, and compliance requirements.

Substitution Basis:

The SF21GHA0G meets or exceeds all critical electrical parameters: 50 V reverse voltage rating, 2 A average rectified current, and identical reverse leakage specifications. Both components operate across the same temperature range (-55°C to 150°C) and are housed in compatible DO-15 through-hole axial packages. Both parts maintain ROHS3 compliance.

Compliance Advantage:

The SF21GHA0G carries Active product status and holds AEC-Q101 automotive qualification, whereas the RL201GP-AP is designated "Not For New Designs." The substitute part offers improved availability and ongoing manufacturer support.

Forward Voltage Consideration:

The SF21GHA0G exhibits a forward voltage of 950 mV at 2 A, compared to 1 V for the RL201GP-AP. This 50 mV reduction represents a minor improvement in forward conduction characteristics and does not preclude substitution in standard rectification applications.

Frequently Asked Questions (FAQ)

Q: Can the SF21GHA0G replace the RL201GP-AP in existing circuit designs?

A: Yes. The SF21GHA0G meets all electrical and mechanical requirements for direct substitution. Both components share identical voltage ratings (50 V), current ratings (2 A), temperature ranges (-55°C to 150°C), and package configurations (DO-15 through-hole axial). Physical pin compatibility and electrical performance are equivalent.

Q: What is the significance of the "Not For New Designs" status on the RL201GP-AP?

A: This designation indicates the RL201GP-AP has reached end-of-life and is no longer recommended for new product development. Existing inventory remains available for legacy system support and repair applications. The SF21GHA0G, with Active status, represents the current production alternative.

Q: Are there package compatibility concerns when substituting these parts?

A: No. Both the RL201GP-AP and SF21GHA0G use identical DO-15 through-hole axial packages. Physical dimensions, lead spacing, and mounting methods are compatible. Direct board-level substitution is possible without layout modifications.

Q: How do the forward voltage specifications affect substitution?

A: The SF21GHA0G forward voltage (950 mV @ 2 A) is 50 mV lower than the RL201GP-AP (1 V @ 2 A). This difference is negligible in most rectification circuits and represents a minor improvement in efficiency. No circuit redesign is required.

Q: What compliance certifications apply to the substitute part?

A: The SF21GHA0G is ROHS3 compliant and holds AEC-Q101 automotive qualification. Both the main part and substitute are REACH unaffected and classified under ECCN EAR99. Compliance requirements are satisfied for both components.

Q: Is the SF21GHA0G suitable for automotive applications?

A: Yes. The SF21GHA0G carries AEC-Q101 qualification, indicating suitability for automotive environments. The RL201GP-AP does not specify automotive qualification. If automotive-grade components are required, the SF21GHA0G provides this additional certification.

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