SL22HE3_A/H Equivalent & Substitute Parts

Part Overview

The SL22HE3_A/H is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 20 V DC reverse voltage and 2 A average rectified current in a surface mount DO-214AA (SMB) package. This component is classified as Active product status and carries AEC-Q101 automotive qualification.

Substitute parts become necessary when the primary component reaches end-of-life status, inventory constraints occur, or design requirements permit operation with alternative electrical characteristics within specified tolerance bands. The SK32B-TP represents a qualified alternative that maintains package compatibility while offering increased current capacity.

Substiute Parts

SL22HE3_A/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 997SL22HE3_A/H Datasheet

Current PartRFQ

SK32B-TP

Micro Commercial CoIn Stock: 3733SK32B-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SL22HE3_A/H is determined by the following critical parameters:

Mandatory Matching Criteria:

• Voltage - DC Reverse (Vr) (Max): 20 V minimum
• Package / Case: DO-214AA (SMB) surface mount configuration
• Technology: Schottky rectifier diode
• Operating Temperature Range: -55°C to 125°C minimum
• RoHS3 Compliance: Required

Allowable Variation Criteria:

• Current - Average Rectified (Io): Equal to or greater than 2 A
• Voltage - Forward (Vf): May exceed specified maximum within thermal design limits
• Current - Reverse Leakage: May exceed specified maximum within acceptable leakage tolerance
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io) or equivalent

The SK32B-TP qualifies as a substitute based on matching voltage rating, package type, technology classification, and temperature range. The increased current rating (3 A versus 2 A) represents an upward-compatible specification that does not compromise circuit functionality in applications designed for the original 2 A rating.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: SL22HE3_A/H

The SL22HE3_A/H maintains Active product status and is the preferred selection for new designs and production applications. This component carries AEC-Q101 automotive qualification, ROHS3 compliance, and unlimited moisture sensitivity level (MSL 1), supporting deployment across automotive and industrial applications without supply chain risk.

Secondary Selection: SK32B-TP

The SK32B-TP is classified as Obsolete and should be selected only when the primary part is unavailable and circuit design permits the electrical characteristic variations documented in the parameter comparison table. The substitute's higher current rating (3 A) and increased reverse leakage (500 µA) are acceptable in applications where the original 2 A specification includes design margin. The substitute maintains identical voltage rating, package configuration, temperature range, and RoHS compliance status.

Compliance Considerations:

Both parts satisfy ROHS3 and REACH compliance requirements. Both components operate across the -55°C to 125°C junction temperature range. Thermal design analysis is required when substituting the SK32B-TP to account for the higher forward voltage drop at rated current, which may increase junction temperature in power-dissipation-sensitive applications.

Frequently Asked Questions (FAQ)

Q: Can SK32B-TP be used as a direct replacement for SL22HE3_A/H in existing production?

A: The SK32B-TP is mechanically and electrically compatible for direct PCB substitution due to identical DO-214AA package configuration and matching 20 V voltage rating. However, the substitute's higher forward voltage drop (500 mV @ 3 A versus 395 mV @ 1 A) and increased reverse leakage (500 µA versus 400 µA) require thermal and circuit performance verification before production implementation.

Q: What is the significance of the current rating difference (2 A versus 3 A)?

A: The SK32B-TP's 3 A rating indicates higher current-carrying capacity than the original 2 A specification. In applications designed for 2 A operation, the substitute operates within its rated envelope with additional thermal margin. The higher rating does not create compatibility issues; it represents an upward-compatible specification.

Q: Why is SK32B-TP listed as Obsolete when SL22HE3_A/H is Active?

A: Product status reflects manufacturer support and availability. The SL22HE3_A/H remains in active production with ongoing manufacturer support. The SK32B-TP has reached end-of-life status and is no longer manufactured, making it suitable only for legacy system maintenance or when primary inventory is exhausted.

Q: Are there electrical performance differences that affect circuit design?

A: Forward voltage drop differs between parts due to different test conditions (395 mV @ 1 A for SL22HE3_A/H versus 500 mV @ 3 A for SK32B-TP). This difference affects power dissipation and junction temperature. Reverse leakage is higher in the substitute (500 µA versus 400 µA), which may impact high-impedance circuit performance. Capacitance data is not available for the substitute, limiting comparative analysis of switching characteristics.

Q: Do both parts meet automotive qualification requirements?

A: The SL22HE3_A/H carries AEC-Q101 automotive qualification. The SK32B-TP qualification status is not specified in the provided data. Automotive applications must verify substitute qualification status with the component manufacturer before implementation.

Q: What packaging formats are available for each part?

A: The SL22HE3_A/H is supplied in Tape & Reel (TR) format. The SK32B-TP is supplied in Cut Tape (CT) and Digi-Reel® format. Both use identical DO-214AA (SMB) component packaging for PCB mounting.