RL201 General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The RL201 is a general purpose rectifier diode manufactured by SMC Diode Solutions, rated for 50 V DC reverse voltage and 2 A average rectified current in a DO-15 through-hole package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating packaging and compliance variations.

Substiute Parts

RL201

SMC Diode SolutionsIn Stock: 3300RL201 Datasheet

Current PartRFQ

RL201G

SMC Diode SolutionsIn Stock: 831RL201G Datasheet

DirectRFQ

1N5391G B0G

Taiwan Semiconductor CorporationIn Stock: 7531N5391G B0G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RL201 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) (Max): 50 V minimum
• Current - Average Rectified (Io): 2 A minimum
• Mounting Type: Through Hole
• Package / Case: DO-15 or DO-204AC compatible

Secondary Compatibility Factors:

• Voltage - Forward (Vf) (Max): Within acceptable operating range
• Current - Reverse Leakage @ Vr: Consistent with application requirements
• Speed: Standard Recovery classification
• Operating Temperature - Junction: Sufficient for application environment

Substitute parts are classified into two categories:

Direct Manufacturer Equivalent: RL201G maintains identical electrical ratings and packaging from the same manufacturer with active product status.

Similar Manufacturer Alternative: 1N5391G B0G provides equivalent voltage and package compatibility but operates at reduced current rating (1.5 A versus 2 A), suitable for applications with lower current demands.

Parameter Comparison

Engineering Selection Recommendations

RL201G (Direct Equivalent): RL201G is the primary substitute for RL201 applications. This part maintains identical electrical specifications (50 V, 2 A) and packaging (DO-15) while offering active product status and extended operating temperature range (-65°C to 175°C versus -65°C to 125°C). RL201G carries ROHS3 compliance certification, meeting modern regulatory requirements. Selection of RL201G is appropriate for direct replacement in existing designs without circuit modification.

1N5391G B0G (Current-Reduced Alternative): 1N5391G B0G operates at 1.5 A average rectified current, representing a 25% reduction from the RL201 specification. This part is suitable for applications where the circuit design permits operation at reduced current ratings. The part maintains 50 V reverse voltage rating and DO-15 package compatibility. Operating temperature range (-55°C to 150°C) is narrower than RL201 but adequate for standard industrial applications. REACH Unaffected status may be advantageous in certain supply chain contexts.

Compliance Considerations: RL201G and 1N5391G B0G both carry ROHS3 compliance. Applications requiring REACH Unaffected status should evaluate 1N5391G B0G. Moisture sensitivity level remains constant across all parts (MSL 1, Unlimited).

Frequently Asked Questions (FAQ)

Q: Can RL201G directly replace RL201 in existing circuit designs? A: Yes. RL201G maintains identical voltage (50 V), current (2 A), and package (DO-15) specifications. No circuit modification is required. The extended operating temperature range of RL201G (-65°C to 175°C) provides additional thermal margin compared to the original RL201 specification (-65°C to 125°C).

Q: What is the primary difference between RL201G and 1N5391G B0G? A: The primary difference is average rectified current rating. RL201G maintains the original 2 A specification, while 1N5391G B0G operates at 1.5 A. Both parts share identical 50 V reverse voltage rating and DO-15 package compatibility. Selection depends on circuit current requirements.

Q: Can 1N5391G B0G be used in applications designed for 2 A operation? A: 1N5391G B0G is rated for 1.5 A maximum average rectified current. Use in 2 A applications would exceed the component's electrical specification and is not permitted. This part is suitable only for applications with current demands of 1.5 A or lower.

Q: Are all substitute parts available in the same DO-15 package? A: Yes. RL201G and 1N5391G B0G are both supplied in DO-15 through-hole packages (also designated DO-204AC). Physical dimensions and pin configurations are compatible with RL201 board layouts.

Q: What compliance certifications apply to these substitute parts? A: RL201G and 1N5391G B0G both carry ROHS3 compliance. RL201G is REACH Affected; 1N5391G B0G is REACH Unaffected. Both parts maintain MSL 1 (Unlimited) moisture sensitivity classification.

Q: How do forward voltage specifications compare across these parts? A: RL201 specifies 1 V maximum forward voltage at 2 A. RL201G and 1N5391G B0G both specify 1.1 V maximum forward voltage (at their respective rated currents: 2 A and 1.5 A). This 0.1 V increase is within typical application tolerances for general purpose rectifier circuits.

Q: Are there inventory considerations for part selection? A: RL201G inventory is 754 pieces; 1N5391G B0G inventory is 730 pieces. Both parts are in active production with new original stock available.