RL203-TP Equivalent & Substitute Parts

Part Overview

The RL203-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 200 V DC reverse voltage and 2 A average rectified current in a DO-15 (DO-204AC) through-hole axial package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The RL203-TP operates across a junction temperature range of -55°C to 150°C and exhibits standard recovery characteristics with reverse recovery time exceeding 500 ns. Forward voltage drop is specified at 1 V maximum at 2 A load current, with reverse leakage current of 5 µA at rated voltage.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	200	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) Maximum @ If	1 V @ 2 A	V @ A
Speed Classification	Standard Recovery >500ns	ns
Current - Reverse Leakage @ Vr	5	µA @ 200 V
Mounting Type	Through Hole	—
Package / Case	DO-204AC, DO-15, Axial	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the RL203-TP are classified into three categories based on electrical and mechanical compatibility:

Direct Substitutes maintain identical electrical ratings (200 V, 2 A) and package form factor (DO-15/DO-204AC axial through-hole). These parts are pin-compatible and functionally equivalent for circuit applications requiring the specified voltage and current ratings.

Upgrade Substitutes provide enhanced performance characteristics while maintaining the same voltage and current ratings. These parts typically feature faster recovery times (≤500 ns versus >500 ns), lower forward voltage drop, or improved temperature range, offering superior performance in the same package.

Similar Substitutes share the same voltage rating (200 V) and package type (DO-15/DO-204AC axial through-hole) but differ in current rating (1 A, 1.5 A, or 1.75 A) or other electrical characteristics. These parts are suitable only for applications where the lower current rating is acceptable.

Substitution compatibility is determined by the following key parameters:

Voltage - DC Reverse (Vr) Maximum: must equal or exceed 200 V
Current - Average Rectified (Io): must equal or exceed 2 A for direct substitutes
Mounting Type: must be Through Hole
Package / Case: must be DO-15, DO-204AC, or equivalent axial configuration
Operating Temperature Range: must encompass the application requirements

Parameter Comparison

Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) @ If	Speed	Trr (ns)	Ir @ Vr	Package	Temp Range °C	Status
RL203-TP	Micro Commercial Co	200	2	1 V @ 2 A	Standard >500ns	—	5 µA @ 200 V	DO-15	-55 to 150	Obsolete
HER203G A0G	Taiwan Semiconductor Corporation	200	2	1 V @ 2 A	Fast ≤500ns	50	5 µA @ 200 V	DO-204AC	-55 to 150	Active
SBYV27-200-E3/73	Vishay General Semiconductor	200	2	1.07 V @ 3 A	Fast ≤500ns	15	5 µA @ 200 V	DO-204AC	-55 to 150	Active
EGP20D-E3/54	Vishay General Semiconductor	200	2	950 mV @ 2 A	Fast ≤500ns	50	5 µA @ 200 V	DO-204AC	-65 to 150	Active
1N5059GP-E3/54	Vishay General Semiconductor	200	1	1.2 V @ 1 A	Standard >500ns	2000	5 µA @ 200 V	DO-204AC	-65 to 175	Active
1N5393GP-E3/54	Vishay General Semiconductor	200	1.5	1.4 V @ 1.5 A	Standard >500ns	2000	5 µA @ 200 V	DO-204AC	-65 to 175	Active
1N5393GP-E3/73	Vishay General Semiconductor	200	1.5	1.4 V @ 1.5 A	Standard >500ns	2000	5 µA @ 200 V	DO-204AC	-65 to 175	Active
1N5615GP-E3/54	Vishay General Semiconductor	200	1	1.2 V @ 1 A	Fast ≤500ns	150	500 nA @ 200 V	DO-204AC	-65 to 175	Active
1N5615GP-E3/73	Vishay General Semiconductor	200	1	1.2 V @ 1 A	Fast ≤500ns	150	500 nA @ 200 V	DO-204AC	-65 to 175	Active
1N6626	Microchip Technology	220	1.75	1.35 V @ 2 A	Fast ≤500ns	30	2 µA @ 220 V	Axial	-65 to 150	Active
BYV27-200-TAP	Vishay General Semiconductor	200	2	1.07 V @ 3 A	Fast ≤500ns	25	1 µA @ 200 V	SOD-57	-55 to 175	Active

Engineering Selection Recommendations

Direct Substitutes for RL203-TP (200 V, 2 A Rating)

HER203G A0G and SBYV27-200-E3/73 are direct electrical equivalents with identical voltage and current ratings. Both parts are active products with ROHS3 compliance and REACH unaffected status. HER203G A0G is manufactured by Taiwan Semiconductor Corporation and available in cut tape packaging with 8349 units in stock. SBYV27-200-E3/73 is manufactured by Vishay General Semiconductor and available in cut tape packaging with 1394 units in stock. Both parts feature fast recovery characteristics (≤500 ns) compared to the standard recovery of the RL203-TP, providing improved performance in switching applications.

Upgrade Substitute for RL203-TP

EGP20D-E3/54 is classified as an upgrade substitute, maintaining the 200 V, 2 A electrical ratings while offering enhanced performance. This part features the lowest forward voltage drop (950 mV @ 2 A) among available substitutes and is part of the SUPERECTIFIER® series. EGP20D-E3/54 extends the lower operating temperature limit to -65°C and is ROHS3 compliant with 1120 units in stock. The extended temperature range and improved forward voltage characteristics make this part suitable for applications requiring superior thermal performance.

Similar Substitutes (Lower Current Ratings)

1N5393GP-E3/54 and 1N5393GP-E3/73 are rated for 1.5 A average rectified current, below the 2 A requirement of the RL203-TP. These parts are suitable only for applications where the circuit current demand does not exceed 1.5 A. Both variants maintain the 200 V voltage rating and are ROHS3 compliant active products with extended temperature range (-65°C to 175°C).

1N5059GP-E3/54 and 1N5615GP-E3/54 are rated for 1 A average rectified current and are suitable only for applications with current requirements not exceeding 1 A. 1N5615GP-E3/54 offers superior reverse leakage characteristics (500 nA versus 5 µA) and fast recovery performance.

Alternative Package Consideration

BYV27-200-TAP maintains the 200 V, 2 A electrical ratings but uses SOD-57 package instead of DO-15/DO-204AC. This part is suitable only for applications where SOD-57 package compatibility exists. The avalanche technology classification and superior reverse leakage (1 µA) provide enhanced performance characteristics.

1N6626 is rated for 220 V and 1.75 A, providing higher voltage margin but lower current capacity than the RL203-TP. This part is RoHS non-compliant and suitable only for applications where compliance requirements permit.

Frequently Asked Questions (FAQ)

Q: Can HER203G A0G directly replace RL203-TP in existing designs?

A: Yes. HER203G A0G maintains identical voltage (200 V) and current (2 A) ratings, forward voltage characteristics (1 V @ 2 A), and package form factor (DO-15/DO-204AC axial through-hole). The part is pin-compatible and functionally equivalent. HER203G A0G features faster recovery time (50 ns versus >500 ns), which improves performance in switching applications without affecting DC rectification functionality.

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

A: Recovery time refers to the interval required for a diode to transition from forward conduction to reverse blocking state. Standard recovery diodes (>500 ns) exhibit slower transitions, while fast recovery diodes (≤500 ns) transition more rapidly. Fast recovery diodes reduce switching losses and electromagnetic interference in high-frequency applications. For DC rectification at line frequency (50/60 Hz), both types function identically. Fast recovery substitutes provide performance improvement without functional change.

Q: Can 1N5393GP-E3/54 (1.5 A) replace RL203-TP (2 A)?

A: 1N5393GP-E3/54 is suitable only if the circuit current requirement does not exceed 1.5 A. If the design requires 2 A capacity, this part will operate beyond its rated current and may fail prematurely. Verify actual circuit current demand before selecting a lower-rated substitute.

Q: What does ROHS3 compliance indicate?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, hexavalent chromium, and specified brominated flame retardants. All active substitute parts listed are ROHS3 compliant, ensuring compatibility with modern procurement and environmental standards.

Q: Why does EGP20D-E3/54 have lower forward voltage (950 mV) than RL203-TP (1 V)?

A: Lower forward voltage drop results from improved semiconductor material and junction design. EGP20D-E3/54 reduces power dissipation during conduction, generating less heat in the same application. This characteristic makes EGP20D-E3/54 preferable for high-current or thermally constrained designs.

Q: Are DO-15 and DO-204AC packages identical?

A: DO-15 and DO-204AC are equivalent designations for the same axial through-hole package. DO-204AC is the formal JEDEC designation, while DO-15 is the legacy designation. Parts specified as either designation are mechanically and electrically interchangeable in through-hole PCB applications.

Q: Can BYV27-200-TAP (SOD-57 package) replace RL203-TP (DO-15 package)?

A: BYV27-200-TAP maintains identical electrical ratings (200 V, 2 A) but uses SOD-57 package instead of DO-15. Physical package incompatibility prevents direct PCB substitution. BYV27-200-TAP is suitable only if the PCB layout accommodates SOD-57 package dimensions and lead spacing.

Q: What is the significance of reverse leakage current differences?

A: Reverse leakage current (Ir) represents the small current flowing through a reverse-biased diode. Lower reverse leakage (500 nA in 1N5615GP-E3/54 versus 5 µA in RL203-TP) indicates superior blocking characteristics and reduced power dissipation in reverse bias conditions. For most applications, both values are acceptable. Superior reverse leakage becomes significant in high-impedance circuits or precision analog applications.

Q: Is the extended temperature range (-65°C to 175°C) of 1N5393GP-E3/54 beneficial for RL203-TP replacement?

A: Extended temperature range provides design margin for applications operating at temperature extremes. If the original design operates within -55°C to 150°C, the extended range of substitute parts offers additional safety margin without functional change. Extended range is beneficial for aerospace, automotive, or industrial applications subject to wide temperature variation.

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