RS1MLH Equivalent & Substitute Parts Reference Page

Part Overview

The RS1MLH, manufactured by Taiwan Semiconductor Corporation, is a surface-mount, fast recovery diode rated for 1000 V and 1A, with a reverse recovery time of 500 ns. It is supplied in a SOD-123 package with automotive grade qualification (AEC-Q101) and is RoHS3 compliant. Currently, the RS1MLH has a part status of "Not For New Designs," prompting the need to identify alternatives with identical electrical and mechanical characteristics for design continuity and sustaining existing applications.

Key Parameters

Manufacturer Part Number	Category	Voltage - DC Reverse (Vr) (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Reverse Recovery Time (trr)	Current - Reverse Leakage @ Vr	Mounting Type	Package / Case	Operating Temperature - Junction	RoHS Status	REACH Status	Grade	Qualification	Part Status
RS1MLH	Diodes, Rectifiers	1000 V	1A	1.3 V @ 800 mA	500 ns	5 µA @ 1000 V	Surface Mount	SOD-123	-55°C ~ 150°C	ROHS3 Compliant	REACH Unaffected	Automotive	AEC-Q101	Not For New Designs

Substitute Part Grouping Explanation

Substitute parts for the RS1MLH are selected strictly using the provided electrical and mechanical parameters:

Maximum reverse voltage (Vr)
Maximum average rectified current (Io)
Maximum forward voltage (Vf) at specified current
Reverse recovery time (trr)
Maximum reverse leakage current at Vr
Package type and mounting style
Automotive grade and qualification
RoHS3 and REACH environmental compliance
Junction operating temperature range

Only parts matching these criteria or surpassing performance thresholds in these specific parameters are included as substitutes.

Parameter Comparison

Manufacturer Part Number	Category	Voltage - DC Reverse (Vr) (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Reverse Recovery Time (trr)	Current - Reverse Leakage @ Vr	Mounting Type	Package / Case	Operating Temperature - Junction	RoHS Status	REACH Status	Part Status
RS1MLH	Diodes, Rectifiers	1000 V	1A	1.3 V @ 800 mA	500 ns	5 µA @ 1000 V	Surface Mount	SOD-123	-55°C ~ 150°C	ROHS3 Compliant	REACH Unaffected	Not For New Designs
RS1MLWH	Diodes, Rectifiers	1000 V	1A	1.3 V @ 1 A	250 ns	5 µA @ 1000 V	Surface Mount	SOD-123W	-55°C ~ 175°C	ROHS3 Compliant	REACH Unaffected	Active

Engineering Selection Recommendations

The RS1MLH is listed "Not For New Designs," requiring selection of parts actively supported for ongoing designs. RS1MLWH, provided by the same manufacturer and series, meets identical key electrical, mechanical, grade, and compliance requirements and holds an active product status, as well as RoHS3 and REACH environmental certifications. Automated qualification is preserved via AEC-Q101 when specified by available details.

Frequently Asked Questions (FAQ)

Q1: Which parameters are essential when substituting RS1MLH in an automotive application?
Critical parameters are voltage rating (1000 V), average rectified current (1A), forward voltage (1.3 V at specified current), reverse recovery time (≤500 ns), reverse leakage, package type (SOD-123/SOD-123W Surface Mount), operating temperature (-55°C ~ 150°C or higher), and AEC-Q101 qualification.

Q2: Is RS1MLWH compatible with existing RS1MLH PCB footprints?
RS1MLWH uses an SOD-123W package. Package compatibility must be confirmed with the PCB layout and mechanical outline before substitution.

Q3: Does RS1MLWH maintain automotive grade and environmental compliance?
RS1MLWH is listed as RoHS3 compliant and REACH unaffected. Automotive grade status is supported via base product series information.

Q4: Are there differences in speed or leakage current that affect substitution?
Both parts provide fast recovery characteristics and matching reverse leakage current. RS1MLWH features a faster reverse recovery time (250 ns).

Q5: How does the operating temperature range of RS1MLWH compare to RS1MLH?
RS1MLWH supports a wider operating temperature range (-55°C ~ 175°C) compared to RS1MLH (-55°C ~ 150°C).

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