HS1ML Equivalent & Substitute Parts

Part Overview

The HS1ML is a general-purpose rectifier diode rated for 1000 V DC reverse voltage and 1 A average rectified current in a Sub SMA surface mount package. This component is classified as "Not For New Designs" by the manufacturer, indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary for ongoing production support, maintenance applications, and design transitions to active product lines.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.7	V @ 1 A
Reverse Recovery Time (trr)	75	ns
Current - Reverse Leakage @ Vr	5	µA @ 1000 V
Operating Temperature - Junction	-55 to 150	°C
Package / Case	DO-219AB (Sub SMA)	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the HS1ML is determined by equivalence in the following electrical parameters: maximum reverse voltage (1000 V), average rectified current (1 A), forward voltage drop (1.7 V @ 1 A), and reverse recovery time (75 ns). All substitute parts must maintain these core electrical specifications to ensure functional compatibility in the application circuit.

Two substitute parts are identified:

HS1MLW — Manufacturer-recommended substitute with identical electrical ratings but different package format (SOD-123W instead of Sub SMA) and improved reverse leakage performance (1 µA vs. 5 µA). Product status is Active.

HS1ML RVG — Parametric equivalent with identical electrical specifications and same Sub SMA package as the main part. Differs only in packaging format (Cut Tape vs. Tape & Reel) and product status (Active vs. Not For New Designs).

Parameter Comparison

Parameter	HS1ML	HS1MLW	HS1ML RVG
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation
Category	Diodes, Rectifiers	Diodes, Rectifiers	Diodes, Rectifiers
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	1000 V
Current - Average Rectified (Io)	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.7 V @ 1 A	1.7 V @ 1 A	1.7 V @ 1 A
Reverse Recovery Time (trr)	75 ns	75 ns	75 ns
Current - Reverse Leakage @ Vr	5 µA @ 1000 V	1 µA @ 1000 V	5 µA @ 1000 V
Capacitance @ Vr, F	15 pF @ 4V, 1MHz	7 pF @ 4V, 1MHz	15 pF @ 4V, 1MHz
Package / Case	DO-219AB (Sub SMA)	SOD-123W	DO-219AB (Sub SMA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55°C to 150°C	-55°C to 175°C	-55°C to 150°C
Product Status	Not For New Designs	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

For package-compatible replacement: HS1ML RVG provides direct electrical and mechanical equivalence to the HS1ML, maintaining the Sub SMA package format and identical electrical performance. HS1ML RVG carries Active product status, ensuring continued availability and manufacturing support. Selection of HS1ML RVG is appropriate when PCB layout and assembly equipment are optimized for Sub SMA packages.

For active product line transition: HS1MLW is the manufacturer-recommended substitute and carries Active product status. HS1MLW operates across an extended temperature range (-55°C to 175°C vs. -55°C to 150°C) and exhibits superior reverse leakage characteristics (1 µA vs. 5 µA). However, HS1MLW uses the SOD-123W package, requiring PCB layout modification and potential assembly process changes. Selection of HS1MLW is appropriate for new production runs and designs where package transition is feasible.

Both substitute parts maintain full compliance with ROHS3 and REACH requirements, matching the regulatory status of the original HS1ML.

Frequently Asked Questions (FAQ)

Q: Can HS1MLW be used as a direct replacement for HS1ML without PCB modification?

A: No. HS1MLW uses the SOD-123W package while HS1ML uses the Sub SMA (DO-219AB) package. These packages have different footprints and pin configurations, requiring PCB layout changes and potential assembly process adjustments.

Q: What is the primary advantage of HS1MLW over HS1ML?

A: HS1MLW offers improved reverse leakage performance (1 µA vs. 5 µA at 1000 V) and an extended maximum junction temperature rating (175°C vs. 150°C). HS1MLW also carries Active product status, ensuring long-term availability.

Q: Is HS1ML RVG electrically identical to HS1ML?

A: Yes. HS1ML RVG maintains identical electrical specifications: 1000 V reverse voltage, 1 A average rectified current, 1.7 V forward voltage drop, 75 ns reverse recovery time, and 5 µA reverse leakage. Both use the Sub SMA package.

Q: What is the difference between HS1ML and HS1ML RVG?

A: The primary differences are product status and packaging format. HS1ML is classified as "Not For New Designs" and supplied in Tape & Reel format. HS1ML RVG carries Active product status and is supplied in Cut Tape format. Electrical performance and package type are identical.

Q: Which substitute should be selected for new product designs?

A: HS1MLW is the manufacturer-recommended choice for new designs, as it carries Active product status and offers improved performance characteristics. If the Sub SMA package is a design requirement, HS1ML RVG is the appropriate active-status equivalent.

Q: Are all three parts (HS1ML, HS1MLW, HS1ML RVG) RoHS and REACH compliant?

A: Yes. All three parts are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Q: What is the capacitance difference between HS1MLW and the other parts?

A: HS1MLW exhibits lower capacitance (7 pF @ 4V, 1MHz) compared to HS1ML and HS1ML RVG (both 15 pF @ 4V, 1MHz). This lower capacitance in HS1MLW may provide benefits in high-frequency switching applications.

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