RL 4Z Equivalent & Substitute Parts Reference

Part Overview

The RL 4Z, manufactured by Sanken Electric USA Inc., is a general-purpose diode with a maximum reverse voltage of 200 V and an average rectified current of 3.5 A in an axial, through-hole package. The product is classified as obsolete and is no longer active in manufacturer listings. For ongoing design support, maintenance, or replacement of RL 4Z in assemblies, it is necessary to identify alternative diodes with comparable electrical and mechanical characteristics within the Diodes, Rectifiers category.

Key Parameters

Parameter	Value
Manufacturer Part Number	RL 4Z
Category	Diodes, Rectifiers
Voltage - DC Reverse (Vr) (Max)	200 V
Current - Average Rectified (Io)	3.5A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 3.5 A
Speed	Fast Recovery =< 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	50 ns
Current - Reverse Leakage @ Vr	150 µA @ 200 V
Mounting Type	Through Hole
Package / Case	Axial
Operating Temperature - Junction	-40°C ~ 150°C
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitute, equivalent, or alternative diodes are identified strictly by matching or exceeding the following key parameters as provided: maximum DC reverse voltage, average rectified current capability, forward voltage at rated current, reverse recovery time, reverse leakage current, speed classification, mounting type (through-hole axial), and RoHS compliance. Substitute groupings are based only on explicit data points present in both the RL 4Z and eligible substitute parts.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Category	Voltage - DC Reverse (Vr) (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Speed	Reverse Recovery Time (trr)	Current - Reverse Leakage @ Vr	Mounting Type	Package / Case	Operating Temperature - Junction	RoHS Status
RL 4Z	Sanken Electric USA Inc.	Diodes, Rectifiers	200 V	3.5A	950 mV @ 3.5A	Fast Recovery =< 500ns, > 200mA (Io)	50 ns	150 µA @ 200 V	Through Hole	Axial	-40°C ~ 150°C	RoHS Compliant
BYV28-200-TAP	Vishay General Semiconductor	Diodes, Rectifiers	200 V	3.5A	1.1 V @ 5A	Fast Recovery =< 500ns, > 200mA (Io)	30 ns	1 µA @ 200 V	Through Hole	SOD-64, Axial	-55°C ~ 175°C	ROHS3 Compliant
BYV98-200-TR	Vishay General Semiconductor	Diodes, Rectifiers	200 V	4A	1.1 V @ 5A	Fast Recovery =< 500ns, > 200mA (Io)	35 ns	10 µA @ 200 V	Through Hole	SOD-64, Axial	-55°C ~ 175°C	ROHS3 Compliant
MUR420-E3/54	Vishay General Semiconductor	Diodes, Rectifiers	200 V	4A	890 mV @ 4A	Fast Recovery =< 500ns, > 200mA (Io)	35 ns	5 µA @ 200 V	Through Hole	DO-201AD, Axial	-65°C ~ 175°C	ROHS3 Compliant
MUR420-E3/73	Vishay General Semiconductor	Diodes, Rectifiers	200 V	4A	890 mV @ 4A	Fast Recovery =< 500ns, > 200mA (Io)	35 ns	5 µA @ 200 V	Through Hole	DO-201AD, Axial	-65°C ~ 175°C	ROHS3 Compliant
MUR420G	onsemi	Diodes, Rectifiers	200 V	4A	890 mV @ 4A	Fast Recovery =< 500ns, > 200mA (Io)	35 ns	5 µA @ 200 V	Through Hole	DO-201AA, DO-27, Axial	-65°C ~ 175°C	ROHS3 Compliant
MUR420RLG	onsemi	Diodes, Rectifiers	200 V	4A	890 mV @ 4A	Fast Recovery =< 500ns, > 200mA (Io)	35 ns	5 µA @ 200 V	Through Hole	DO-201AA, DO-27, Axial	-65°C ~ 175°C	ROHS3 Compliant
STTH3R02	STMicroelectronics	Diodes, Rectifiers	200 V	3A	1 V @ 3A	Fast Recovery =< 500ns, > 200mA (Io)	30 ns	3 µA @ 200 V	Through Hole	DO-201AD, Axial	175°C (Max)	ROHS3 Compliant
STTH3R02RL	STMicroelectronics	Diodes, Rectifiers	200 V	3A	1 V @ 3A	Fast Recovery =< 500ns, > 200mA (Io)	30 ns	3 µA @ 200 V	Through Hole	DO-201AD, Axial	175°C (Max)	ROHS3 Compliant
UG4D-E3/54	Vishay General Semiconductor	Diodes, Rectifiers	200 V	4A	950 mV @ 4A	Fast Recovery =< 500ns, > 200mA (Io)	30 ns	5 µA @ 200 V	Through Hole	DO-201AD, Axial	-55°C ~ 150°C	ROHS3 Compliant
UG4D-E3/73	Vishay General Semiconductor	Diodes, Rectifiers	200 V	4A	950 mV @ 4A	Fast Recovery =< 500ns, > 200mA (Io)	30 ns	5 µA @ 200 V	Through Hole	DO-201AD, Axial	-55°C ~ 150°C	ROHS3 Compliant

Engineering Selection Recommendations

Given the obsolete status of the Sanken RL 4Z, selection of substitute diodes should prioritize products with active status and ROHS3 compliance. The listed alternatives meet or exceed the core electrical parameters (voltage, current rating, recovery speed, reverse leakage), offer comparable or extended junction temperature ranges, and conform to through-hole axial mounting. Selection within this group is based on matching the specified envelope and compliance requirements as shown.

Frequently Asked Questions (FAQ)

Q1: What are the most critical parameters when substituting RL 4Z in a rectifier circuit?
A1: Maximum DC reverse voltage, average rectified current, forward voltage at rated current, reverse recovery time, reverse leakage, speed class, mounting type, and RoHS compliance are the decisive criteria.

Q2: Are all listed substitutes suitable for through-hole installation?
A2: Yes, all replacement part numbers are provided in through-hole, axial or SOD-64/DO-201 packages as specified for RL 4Z.

Q3: How does the junction temperature range affect selection?
A3: All substitutes listed feature equal or wider operating temperature ranges compared to RL 4Z, ensuring compatibility within standard thermal design envelopes as per provided specifications.

Q4: Should reverse recovery time and reverse leakage current always match exactly?
A4: Substitutes presented have reverse recovery times and leakage currents equal to or lower than the RL 4Z, maintaining or improving the performance criteria outlined.

Q5: Why is RoHS compliance essential for selection?
A5: RoHS status ensures regulatory compatibility for new designs and ongoing maintenance, aligned with the compliance status of RL 4Z.

Q6: Are package styles identical across all alternatives?
A6: All alternatives are offered in axial (DO-201AD, DO-201AA, SOD-64, DO-27) format, meeting the mechanical and installation requirements given for RL 4Z.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message