MR854RL Equivalent & Substitute Parts

Part Overview

The MR854RL is a general-purpose rectifier diode manufactured by onsemi, rated for 400 V DC reverse voltage and 3 A average rectified current in an axial through-hole package. This component is classified as obsolete, indicating it is no longer in active production. Locating equivalent substitute parts is necessary for ongoing circuit maintenance, repair, and new design implementations where this diode specification is required.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	400 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	300 ns
Current - Reverse Leakage @ Vr	10 µA @ 400 V
Mounting Type	Through Hole
Package / Case	DO-201AA, DO-27, Axial
Operating Temperature - Junction	-65°C ~ 125°C
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitute parts for the MR854RL are grouped based on strict electrical and mechanical compatibility criteria. All substitute candidates must satisfy the following parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 400 V
Current - Average Rectified (Io): 3 A
Mounting Type: Through Hole
Package / Case: DO-201AA, DO-27, or DO-201AD (Axial)

Acceptable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Substitutes may vary within the range of 950 mV to 1.3 V at 3 A
Speed: Both Fast Recovery (≤ 500ns) and Standard Recovery (> 500ns) are acceptable
Reverse Recovery Time (trr): Substitutes may range from 50 ns to 5 µs
Current - Reverse Leakage @ Vr: Substitutes may range from 5 µA to 10 µA at 400 V
Operating Temperature - Junction: Substitutes may extend beyond the original range

Compliance Considerations:

RoHS3 Compliant substitutes are preferred for new designs
Product Status: Active or Not For New Designs are acceptable; Obsolete status indicates end-of-life

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	trr	Ir @ Vr	Package	Temp Range	Product Status	RoHS Status
MR854RL	onsemi	400 V	3 A	1.25 V @ 3 A	Fast Recovery ≤ 500ns	300 ns	10 µA @ 400 V	DO-201AA, DO-27, Axial	-65°C ~ 125°C	Obsolete	RoHS non-compliant
MR854RLG	onsemi	400 V	3 A	1.25 V @ 3 A	Fast Recovery ≤ 500ns	300 ns	10 µA @ 400 V	DO-201AA, DO-27, Axial	-65°C ~ 125°C	Active	ROHS3 Compliant
1N5404G	onsemi	400 V	3 A	1 V @ 3 A	Standard Recovery > 500ns	—	10 µA @ 400 V	DO-201AA, DO-27, Axial	-65°C ~ 150°C	Not For New Designs	ROHS3 Compliant
1N5404-E3/54	Vishay General Semiconductor - Diodes Division	400 V	3 A	1.2 V @ 3 A	Standard Recovery > 500ns	—	5 µA @ 400 V	DO-201AD, Axial	-50°C ~ 150°C	Active	ROHS3 Compliant
1N5404-G	Comchip Technology	400 V	3 A	950 mV @ 3 A	Standard Recovery > 500ns	—	5 µA @ 400 V	DO-201AD, Axial	-65°C ~ 125°C	Active	ROHS3 Compliant
1N5404GP-AP	Micro Commercial Co	400 V	3 A	1.1 V @ 3 A	Standard Recovery > 500ns	—	5 µA @ 400 V	DO-201AD, Axial	-55°C ~ 150°C	Active	ROHS3 Compliant
FR304GP-AP	Micro Commercial Co	400 V	3 A	1.3 V @ 3 A	Fast Recovery ≤ 500ns	150 ns	5 µA @ 400 V	DO-201AD, Axial	-55°C ~ 150°C	Active	ROHS3 Compliant
FR304GP-TP	Micro Commercial Co	400 V	3 A	1.3 V @ 3 A	Fast Recovery ≤ 500ns	150 ns	5 µA @ 400 V	DO-201AD, Axial	-55°C ~ 150°C	Active	ROHS3 Compliant
GI504-E3/54	Vishay General Semiconductor - Diodes Division	400 V	3 A	1.1 V @ 9.4 A	Standard Recovery > 500ns	2 µs	5 µA @ 400 V	DO-201AD, Axial	-50°C ~ 150°C	Active	ROHS3 Compliant
GP30G-E3/54	Vishay General Semiconductor - Diodes Division	400 V	3 A	1.1 V @ 3 A	Standard Recovery > 500ns	5 µs	5 µA @ 400 V	DO-201AD, Axial	-65°C ~ 175°C	Active	ROHS3 Compliant
HER305G-AP	Micro Commercial Co	400 V	3 A	1.3 V @ 3 A	Fast Recovery ≤ 500ns	50 ns	10 µA @ 400 V	DO-201AD, Axial	-55°C ~ 150°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Highest Compatibility):

MR854RLG is the direct successor to MR854RL, manufactured by onsemi. This part maintains identical electrical specifications including 400 V reverse voltage, 3 A average rectified current, 1.25 V forward voltage at 3 A, and 300 ns reverse recovery time. The primary distinction is product status: MR854RLG is Active and ROHS3 Compliant, whereas MR854RL is Obsolete and RoHS non-compliant. MR854RLG is the recommended choice for applications requiring the exact electrical and thermal characteristics of the original part.

Active Alternatives with Fast Recovery Characteristics:

FR304GP-AP and FR304GP-TP (Micro Commercial Co) maintain the fast recovery speed characteristic of the MR854RL (≤ 500ns) with a shorter reverse recovery time of 150 ns. These parts are available in active production status and ROHS3 Compliant. The forward voltage is slightly elevated at 1.3 V @ 3 A compared to the original 1.25 V. FR304GP-TP is supplied in Tape & Reel packaging, while FR304GP-AP is supplied in bulk packaging.

HER305G-AP (Micro Commercial Co) offers the fastest reverse recovery time at 50 ns among all substitutes, with fast recovery speed classification. Forward voltage is 1.3 V @ 3 A. This part is suitable for applications where switching speed is critical.

Active Alternatives with Standard Recovery Characteristics:

1N5404-G (Comchip Technology), 1N5404-E3/54 (Vishay), 1N5404GP-AP (Micro Commercial Co), GI504-E3/54 (Vishay), and GP30G-E3/54 (Vishay) all feature standard recovery speed (> 500ns). These parts are in active production and ROHS3 Compliant. Forward voltage ranges from 950 mV to 1.2 V @ 3 A. These alternatives are suitable for applications where switching speed is not a limiting factor and lower forward voltage drop is beneficial.

Compliance Status:

All listed substitute parts are ROHS3 Compliant and REACH Unaffected, making them suitable for new designs and applications subject to environmental regulations. The original MR854RL is RoHS non-compliant and should be replaced in new designs.

Product Status Consideration:

1N5404G carries a "Not For New Designs" status despite being in inventory. This part should be used only for legacy system maintenance where exact compatibility with existing designs is required.

Frequently Asked Questions (FAQ)

Q: Can MR854RLG be used as a direct replacement for MR854RL?

A: Yes. MR854RLG is the direct successor to MR854RL with identical electrical specifications: 400 V reverse voltage, 3 A average rectified current, 1.25 V forward voltage at 3 A, and 300 ns reverse recovery time. The primary difference is that MR854RLG is in active production and ROHS3 Compliant, whereas MR854RL is obsolete and RoHS non-compliant.

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

A: Fast recovery diodes have a reverse recovery time of 500 ns or less, while standard recovery diodes exceed 500 ns. Fast recovery diodes are suitable for high-frequency switching applications where reduced switching losses are required. Standard recovery diodes are appropriate for lower-frequency rectification applications. The MR854RL specifies fast recovery at 300 ns reverse recovery time.

Q: Are all substitute parts compatible with the original MR854RL package?

A: All substitute parts listed are through-hole axial diodes compatible with DO-201AA, DO-27, or DO-201AD packages. Physical dimensions are standardized across these package designations, allowing direct mechanical substitution in PCB layouts designed for the MR854RL.

Q: What is the significance of forward voltage differences among substitutes?

A: Forward voltage (Vf) determines the voltage drop across the diode during conduction. The MR854RL specifies 1.25 V @ 3 A. Substitutes range from 950 mV to 1.3 V @ 3 A. Lower forward voltage reduces power dissipation and heat generation. Higher forward voltage increases power dissipation. Selection depends on circuit design requirements for voltage drop and thermal management.

Q: Why do some substitutes have lower reverse leakage current?

A: Reverse leakage current (Ir) represents the small current flowing through the diode in reverse bias. The MR854RL specifies 10 µA @ 400 V. Several substitutes specify 5 µA @ 400 V, indicating lower leakage. Lower leakage current reduces standby power consumption and improves circuit performance in high-impedance applications.

Q: Is RoHS compliance important for my application?

A: RoHS3 compliance is mandatory for products sold in the European Union and many other jurisdictions. All substitute parts listed are ROHS3 Compliant. If your application is subject to environmental regulations or customer requirements, RoHS compliance is essential. The original MR854RL is RoHS non-compliant and should not be used in new designs destined for regulated markets.

Q: Can I use a standard recovery diode in place of a fast recovery diode?

A: Standard recovery diodes can be used in applications where switching speed is not critical, such as low-frequency power supply rectification. However, in high-frequency switching applications, standard recovery diodes generate higher switching losses and may cause circuit instability. The MR854RL is specified as fast recovery; substitution with standard recovery types should be evaluated against specific circuit requirements.

Q: What is the operating temperature range consideration?

A: The MR854RL specifies -65°C to 125°C junction temperature range. Several substitutes extend this range to -50°C to 150°C or -65°C to 175°C. Extended temperature range provides greater operational margin in extreme environments. Selection depends on the thermal environment of the application.

Q: Are there packaging differences I should consider?

A: Substitute parts are supplied in different packaging formats: Bulk, Cut Tape (CT), and Tape & Reel (TR). These packaging options affect handling, storage, and automated assembly compatibility. Bulk packaging is suitable for manual assembly or small quantities. Cut Tape and Tape & Reel formats are optimized for automated pick-and-place assembly. Physical diode dimensions remain standardized across all packaging options.

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