MR852RL Equivalent & Substitute Parts

Part Overview

The MR852RL is a general-purpose rectifier diode manufactured by onsemi, rated for 200 V DC reverse voltage and 3 A average rectified current in an axial through-hole package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The MR852RL features fast recovery characteristics with a reverse recovery time of 300 ns, suitable for standard rectification circuits requiring moderate switching speeds.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 3 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	-
Reverse Recovery Time (trr)	300	ns
Current - Reverse Leakage @ Vr	10	µA @ 200 V
Mounting Type	Through Hole	-
Package / Case	DO-201AA, DO-27, Axial	-
Operating Temperature - Junction	-65 to 125	°C
RoHS Status	RoHS non-compliant	-

Substitute Part Grouping Explanation

Substitution of the MR852RL is determined by strict equivalence in the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 200 V
Current - Average Rectified (Io): 3 A
Mounting Type: Through Hole
Package / Case: Axial configuration (DO-201AA, DO-27, or DO-201AD)

Secondary Compatibility Factors:

Forward voltage (Vf) at rated current must not exceed application requirements
Reverse recovery time (trr) and speed classification determine switching performance suitability
Reverse leakage current must remain within acceptable limits for the application
Operating temperature range must encompass the intended thermal environment

Substitute parts are grouped into two categories based on package compatibility:

Category 1: DO-27 / DO-201AA Axial Package (Direct Physical Replacement) Parts maintaining the original axial lead configuration and package footprint.

Category 2: DO-201AD Axial Package (Electrical Equivalent, Package Variant) Parts with identical electrical ratings but utilizing the DO-201AD package variant, suitable for applications where package geometry flexibility exists.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	Speed	trr [ns/µs]	Ir @ Vr [µA]	Package	Product Status	RoHS
MR852RL	onsemi	200	3	1.25 @ 3A	Fast Recovery ≤ 500ns	300	10 @ 200V	DO-201AA, DO-27	Obsolete	Non-compliant
1N5402G	Taiwan Semiconductor Corporation	200	3	1.0 @ 3A	Standard Recovery > 500ns	-	5 @ 200V	DO-201AD	Active	ROHS3 Compliant
EGP30D	onsemi	200	3	0.95 @ 3A	Fast Recovery ≤ 500ns	50	5 @ 200V	DO-201AD	Not For New Designs	ROHS3 Compliant
1N5402-G	Comchip Technology	200	3	1.0 @ 3A	Standard Recovery > 500ns	-	5 @ 200V	DO-201AD	Active	ROHS3 Compliant
BY251P-E3/73	Vishay General Semiconductor - Diodes Division	200	3	1.1 @ 3A	Standard Recovery > 500ns	3000	5 @ 200V	DO-201AD	Active	ROHS3 Compliant
FR303GP-AP	Micro Commercial Co	200	3	1.3 @ 3A	Fast Recovery ≤ 500ns	150	5 @ 200V	DO-201AD	Active	ROHS3 Compliant
GI502-E3/54	Vishay General Semiconductor - Diodes Division	200	3	1.1 @ 9.4A	Standard Recovery > 500ns	2000	5 @ 200V	DO-201AD	Active	ROHS3 Compliant
GP30D-E3/54	Vishay General Semiconductor - Diodes Division	200	3	1.1 @ 3A	Standard Recovery > 500ns	5000	5 @ 200V	DO-201AD	Active	ROHS3 Compliant
GP30D-E3/73	Vishay General Semiconductor - Diodes Division	200	3	1.1 @ 3A	Standard Recovery > 500ns	5000	5 @ 200V	DO-201AD	Active	ROHS3 Compliant
HER303G-AP	Micro Commercial Co	200	3	0.95 @ 3A	Fast Recovery ≤ 500ns	50	10 @ 200V	DO-201AD	Active	ROHS3 Compliant
HER303GA-G	Comchip Technology	200	3	1.0 @ 3A	Fast Recovery ≤ 500ns	50	5 @ 200V	DO-201AA, DO-27	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Physical Replacement (Same Package Footprint):

HER303GA-G (Comchip Technology) is the primary substitute for applications requiring identical DO-27 / DO-201AA axial package geometry. This part maintains active product status with ROHS3 compliance, fast recovery characteristics (50 ns trr), and forward voltage of 1.0 V at 3 A. Operating temperature range extends to 150°C, exceeding the MR852RL specification.

For Electrical Equivalence with Package Flexibility:

Multiple active substitutes exist in the DO-201AD package format:

EGP30D (onsemi): Maintains manufacturer continuity with fast recovery performance (50 ns trr) and superior forward voltage characteristics (0.95 V). Classified as "Not For New Designs," limiting suitability for new production.
1N5402G (Taiwan Semiconductor Corporation) and 1N5402-G (Comchip Technology): Both provide active product status with ROHS3 compliance. Standard recovery characteristics (>500 ns) and forward voltage of 1.0 V at 3 A. Suitable for applications where switching speed requirements are less stringent than the MR852RL.
HER303G-AP (Micro Commercial Co): Offers fast recovery performance (50 ns trr) with forward voltage of 0.95 V and active product status. Reverse leakage current matches the MR852RL at 10 µA @ 200 V.
FR303GP-AP (Micro Commercial Co): Fast recovery diode (150 ns trr) with active status and ROHS3 compliance. Forward voltage of 1.3 V represents the highest among active substitutes.
BY251P-E3/73 (Vishay General Semiconductor - Diodes Division): Standard recovery device with 1.1 V forward voltage and active status. Extended reverse recovery time (3 µs) indicates slower switching characteristics.
GI502-E3/54 and GP30D-E3/54 / GP30D-E3/73 (Vishay General Semiconductor - Diodes Division): All maintain active product status with ROHS3 compliance. Standard recovery characteristics with forward voltage of 1.1 V at 3 A. GP30D variants feature extended operating temperature range to 175°C.

Compliance Considerations:

All recommended substitutes achieve ROHS3 compliance, addressing the non-compliant status of the obsolete MR852RL. Selection between fast recovery and standard recovery variants depends on circuit switching frequency requirements and thermal management constraints.

Frequently Asked Questions (FAQ)

Q: Can I use a DO-201AD package diode as a direct replacement for the MR852RL in its original circuit board?

A: DO-201AD and DO-27 packages are both axial through-hole configurations with compatible lead spacing for standard PCB hole patterns. Physical substitution is feasible in most applications. Verify PCB layout accommodates the specific package geometry before implementation.

Q: What is the difference between fast recovery and standard recovery diodes in the substitute list?

A: Fast recovery diodes (trr ≤ 500 ns) exhibit shorter reverse recovery time, reducing switching losses and enabling operation at higher frequencies. Standard recovery diodes (trr > 500 ns) are suitable for lower-frequency applications and typically exhibit lower forward voltage drop. Selection depends on circuit operating frequency and thermal requirements.

Q: Why do some substitutes have lower forward voltage than the MR852RL?

A: Forward voltage variation results from differences in semiconductor material composition, doping profiles, and manufacturing processes between manufacturers. Lower forward voltage (0.95 V vs. 1.25 V) reduces power dissipation and heat generation, providing improved efficiency. Verify that lower forward voltage does not create circuit compatibility issues with voltage-sensitive applications.

Q: Is the MR852RL's 10 µA reverse leakage current critical for substitute selection?

A: Most active substitutes specify 5 µA reverse leakage at 200 V, which is lower than the MR852RL. This represents improved performance and does not create compatibility issues. HER303G-AP maintains 10 µA leakage, matching the original specification exactly. For applications with stringent leakage requirements, HER303G-AP provides direct equivalence.

Q: What does "Not For New Designs" status mean for the EGP30D?

A: This designation indicates the manufacturer has discontinued active development and support for this part number. While functional equivalence exists, onsemi recommends alternative parts for new product development. For legacy system maintenance, EGP30D remains available but may face future supply constraints.

Q: How do operating temperature ranges affect substitute selection?

A: The MR852RL operates from -65°C to 125°C. Most active substitutes extend the upper limit to 150°C or higher, providing thermal margin. Applications operating near the MR852RL's temperature limits benefit from substitutes with extended ranges. Verify that the selected substitute's temperature range encompasses the actual operating environment.

Q: Are all listed substitutes RoHS compliant?

A: All active substitute parts listed achieve ROHS3 compliance. The MR852RL is RoHS non-compliant. For applications subject to RoHS regulations or customer requirements, any active substitute provides compliance improvement. EGP30D, though classified "Not For New Designs," also achieves ROHS3 compliance.

Q: What packaging options are available for the MR852RL substitutes?

A: Substitutes are available in two primary configurations: DO-27 / DO-201AA (original axial package) and DO-201AD (variant axial package). HER303GA-G provides direct DO-27 compatibility. All other active substitutes utilize DO-201AD packaging. Both configurations maintain through-hole mounting and axial lead geometry suitable for standard PCB assembly.

Q: Can I mix different substitute part numbers in the same circuit or production batch?

A: All listed substitutes meet the 200 V / 3 A electrical specification and through-hole axial package requirements. Mixing different manufacturers or speed classifications (fast vs. standard recovery) within a single circuit is electrically feasible. However, production consistency and supply chain management typically favor standardizing on a single substitute part number per application.

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