SS19LHMQG Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS19LHMQG is a surface mount Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 90 V DC reverse voltage and 1 A average rectified current. This component is classified as an active product and carries automotive-grade qualification under AEC-Q101 standards. The part is packaged in DO-219AB (Sub SMA) configuration for surface mount applications.

Identification of equivalent and substitute parts becomes necessary when the primary part number reaches end-of-life status, experiences supply constraints, or when design flexibility is required within the same electrical and mechanical specifications. The SS19LHMQG maintains full compatibility with specified substitute parts that share identical electrical ratings and package configurations.

Substiute Parts

SS19LHMQG

Taiwan Semiconductor CorporationIn Stock: 1079SS19LHMQG Datasheet

Current PartRFQ

SS19L

Taiwan Semiconductor CorporationIn Stock: 7640SS19L Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SS19LHMQG is permissible with parts that maintain identical electrical and mechanical specifications across all critical parameters. The substitution logic is based strictly on the following criteria:

Electrical Parameters (Must Match Exactly):

• Voltage - DC Reverse (Vr) (Max): 90 V
• Current - Average Rectified (Io): 1 A
• Voltage - Forward (Vf) (Max) @ If: 800 mV @ 1 A
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 50 µA @ 90 V
• Operating Temperature - Junction: -55°C to 150°C

Mechanical Parameters (Must Match Exactly):

• Package / Case: DO-219AB (Sub SMA)
• Mounting Type: Surface Mount
• Technology: Schottky

Compliance Parameters (Must Match Exactly):

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• REACH Status: REACH Unaffected

The SS19L meets all substitution criteria and is classified as a parametric equivalent to the SS19LHMQG. Product status differences do not affect electrical or mechanical interchangeability.

Parameter Comparison

Engineering Selection Recommendations

For Active Product Selection: The SS19LHMQG is the preferred selection for new designs. This part carries Active product status and is suitable for ongoing development and production applications. The part maintains full automotive-grade qualification under AEC-Q101 standards and is ROHS3 compliant.

For Substitute Selection: The SS19L is electrically and mechanically equivalent to the SS19LHMQG and provides full functional interchangeability. However, the SS19L carries a "Not For New Designs" product status designation. This part is appropriate for legacy system support, field replacements, or applications where existing inventory must be utilized. The SS19L maintains identical electrical performance, package configuration, and compliance certifications.

Compliance Considerations: Both parts satisfy automotive-grade requirements and carry AEC-Q101 qualification. Both parts are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is identical at MSL 1 (Unlimited), indicating no special moisture handling requirements during storage or assembly.

Frequently Asked Questions (FAQ)

Q: Can the SS19L be used as a direct replacement for the SS19LHMQG in existing designs?

A: Yes. The SS19L is electrically and mechanically identical to the SS19LHMQG. All electrical parameters, package configuration, and compliance certifications match exactly. Direct substitution is permissible without circuit modification.

Q: What is the significance of the "Not For New Designs" status on the SS19L?

A: This designation indicates that the SS19L is in a mature or declining production phase. The part remains fully functional and compliant with all specifications. The designation reflects manufacturing lifecycle status rather than technical capability. New designs should prioritize the SS19LHMQG (Active status), while the SS19L is suitable for legacy support and field replacement applications.

Q: Are there any differences in package handling or storage between the SS19LHMQG and SS19L?

A: No. Both parts share identical moisture sensitivity level (MSL 1 - Unlimited), indicating no special moisture control requirements during storage or assembly. Both parts use the same DO-219AB (Sub SMA) package configuration and require identical PCB footprints.

Q: Can the SS19LHMQG and SS19L be mixed in the same production batch?

A: Yes. Both parts are electrically and mechanically identical and carry the same compliance certifications. They are interchangeable at the component level and can be used interchangeably in the same circuit without performance variation.

Q: What are the critical parameters that define substitution eligibility for Schottky diodes in this category?

A: Substitution eligibility is determined by exact matching of: (1) Voltage - DC Reverse (Vr) rating, (2) Current - Average Rectified (Io) rating, (3) Forward voltage drop (Vf), (4) Recovery speed characteristics, (5) Reverse leakage current, (6) Operating temperature range, (7) Package type and mounting configuration, and (8) Compliance certifications (RoHS, REACH, AEC-Q101).

Q: Is the SS19LHMQG suitable for automotive applications?

A: Yes. The SS19LHMQG carries automotive-grade classification and AEC-Q101 qualification, confirming suitability for automotive circuit applications. The SS19L substitute also maintains identical automotive-grade qualification and AEC-Q101 certification.