SS19L Equivalent & Substitute Parts

Part Overview

The SS19L is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 90 V DC reverse voltage and 1 A average rectified current. The device is packaged in DO-219AB (Sub SMA) surface mount configuration and operates across a junction temperature range of -55°C to 150°C. The SS19L is classified as "Not For New Designs," indicating its legacy status in the product portfolio. Identification of equivalent and substitute parts is necessary for design continuity, supply chain flexibility, and long-term component availability management.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	90	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	800 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	50	µA @ 90 V
Mounting Type	Surface Mount	—
Package / Case	DO-219AB	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the SS19L are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents (Identical Electrical Specifications): Parts SS19L M2G, SS19L MHG, SS19L MQG, SS19L MTG, SS19L RFG, SS19L RHG, SS19L RQG, SS19L RTG, and SS19L RUG maintain identical electrical parameters to the main part: 90 V reverse voltage, 1 A average rectified current, 800 mV forward voltage at 1 A, fast recovery speed ≤ 500ns, and 50 µA reverse leakage current at 90 V. These parts are housed in the same DO-219AB package and operate across the identical temperature range. The suffix variations (M2G, MHG, MQG, MTG, RFG, RHG, RQG, RTG, RUG) represent different manufacturing date codes or tape/reel configurations. All parametric equivalents carry Active product status, ensuring ongoing availability and support.

Manufacturer Recommended Substitute (Upgraded Specifications): Part SS110LW represents a higher-specification alternative with 100 V reverse voltage rating (versus 90 V) and reduced reverse leakage current of 10 µA at 100 V (versus 50 µA at 90 V). The SS110LW maintains the same 1 A average rectified current and 800 mV forward voltage at 1 A. However, the SS110LW uses SOD-123W package instead of DO-219AB Sub SMA, requiring PCB layout and footprint modifications. The SS110LW carries Active product status and is supplied in Tape & Reel (TR) packaging.

Substitution Criteria: All substitute parts share the following mandatory parameters with the SS19L:

Technology: Schottky
Current - Average Rectified (Io): 1 A
Voltage - Forward (Vf) (Max) @ If: 800 mV @ 1 A
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type: Surface Mount
Operating Temperature - Junction: -55°C to 150°C
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Parameter Comparison

Parameter	SS19L	SS19L M2G	SS19L MHG	SS19L MQG	SS19L MTG	SS19L RFG	SS19L RHG	SS19L RQG	SS19L RTG	SS19L RUG	SS110LW
Voltage - DC Reverse (Vr) (Max)	90 V	90 V	90 V	90 V	90 V	90 V	90 V	90 V	90 V	90 V	100 V
Current - Average Rectified (Io)	1 A	1 A	1 A	1 A	1 A	1 A	1 A	1 A	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	800 mV @ 1 A	800 mV @ 1 A	800 mV @ 1 A	800 mV @ 1 A	800 mV @ 1 A	800 mV @ 1 A	800 mV @ 1 A	800 mV @ 1 A	800 mV @ 1 A	800 mV @ 1 A	800 mV @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Current - Reverse Leakage @ Vr	50 µA @ 90 V	50 µA @ 90 V	50 µA @ 90 V	50 µA @ 90 V	50 µA @ 90 V	50 µA @ 90 V	50 µA @ 90 V	50 µA @ 90 V	50 µA @ 90 V	50 µA @ 90 V	10 µA @ 100 V
Package / Case	DO-219AB	DO-219AB	DO-219AB	DO-219AB	DO-219AB	DO-219AB	DO-219AB	DO-219AB	DO-219AB	DO-219AB	SOD-123W
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Not For New Designs	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

For Direct Replacement (Same Footprint and Specifications): Select any of the parametric equivalent parts (SS19L M2G, SS19L MHG, SS19L MQG, SS19L MTG, SS19L RFG, SS19L RHG, SS19L RQG, SS19L RTG, or SS19L RUG). These parts are electrically and mechanically identical to the SS19L and require no PCB layout modifications. All parametric equivalents carry Active product status, ensuring long-term availability and manufacturing support. Selection among these variants depends on packaging preference (Tape & Reel versus Cut Tape) and inventory availability.

For Upgraded Performance with Layout Modification: The SS110LW offers improved specifications with 100 V reverse voltage rating and reduced reverse leakage current (10 µA at 100 V versus 50 µA at 90 V). Implementation of the SS110LW requires PCB footprint redesign due to the SOD-123W package transition from DO-219AB Sub SMA. The SS110LW carries Active product status and is supplied in Tape & Reel packaging. This option is suitable for new design iterations or redesign cycles where enhanced voltage margin and lower leakage characteristics provide system-level benefits.

Compliance Considerations: All substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited moisture sensitivity), and identical operating temperature ranges (-55°C to 150°C). No additional qualification or compliance verification is required when transitioning between the SS19L and any listed substitute part.

Frequently Asked Questions (FAQ)

Q: Can SS19L parametric equivalents be used interchangeably on the same PCB?

A: Yes. Parts SS19L M2G, SS19L MHG, SS19L MQG, SS19L MTG, SS19L RFG, SS19L RHG, SS19L RQG, SS19L RTG, and SS19L RUG are electrically and mechanically identical to the SS19L. They share the same DO-219AB package footprint, electrical ratings (90 V, 1 A, 800 mV forward voltage), and operating temperature range. Direct substitution requires no PCB modifications or design changes.

Q: What is the difference between SS19L variants with different suffixes (M2G, MHG, MQG, etc.)?

A: The suffix variations represent different manufacturing date codes or tape/reel configurations assigned by Taiwan Semiconductor Corporation. The electrical and mechanical specifications remain identical across all variants. Selection is based on packaging preference (Tape & Reel versus Cut Tape) and inventory availability for procurement purposes.

Q: Why is SS110LW listed as a substitute if it has a different package?

A: The SS110LW is classified as a manufacturer-recommended substitute because it provides upgraded electrical specifications (100 V reverse voltage and 10 µA reverse leakage) while maintaining the same 1 A current rating and 800 mV forward voltage. However, the SOD-123W package differs from the DO-219AB Sub SMA package of the SS19L. Implementation of SS110LW requires PCB footprint redesign and is suitable for new design iterations or system redesigns where the enhanced voltage margin and lower leakage characteristics provide measurable benefits.

Q: Are all substitute parts RoHS compliant?

A: Yes. The SS19L and all listed substitute parts (SS19L M2G, SS19L MHG, SS19L MQG, SS19L MTG, SS19L RFG, SS19L RHG, SS19L RQG, SS19L RTG, SS19L RUG, and SS110LW) are ROHS3 compliant. No additional environmental or regulatory qualification is required.

Q: What is the moisture sensitivity level for these diodes?

A: All parts listed carry Moisture Sensitivity Level (MSL) 1, classified as Unlimited. This indicates the lowest moisture sensitivity classification, requiring no special moisture control or baking procedures during storage, handling, or assembly.

Q: Can the SS19L be used in new designs?

A: The SS19L carries a "Not For New Designs" product status. For new design implementations, select one of the Active-status parametric equivalents (SS19L M2G, SS19L MHG, SS19L MQG, SS19L MTG, SS19L RFG, SS19L RHG, SS19L RQG, SS19L RTG, or SS19L RUG) to ensure long-term manufacturing support and availability.

Q: What are the key electrical parameters that determine substitution compatibility?

A: Substitution compatibility is determined by the following parameters: Voltage - DC Reverse (Vr) (Max), Current - Average Rectified (Io), Voltage - Forward (Vf) (Max) @ If, Speed (Fast Recovery ≤ 500ns, > 200mA), and Current - Reverse Leakage @ Vr. All parametric equivalents maintain identical values for these parameters. The SS110LW differs in reverse voltage (100 V versus 90 V) and reverse leakage current (10 µA @ 100 V versus 50 µA @ 90 V), representing an upgraded specification profile.

Q: Is packaging format (Cut Tape versus Tape & Reel) a factor in electrical substitution?

A: No. Packaging format (Cut Tape versus Tape & Reel) affects procurement and assembly logistics but does not impact electrical performance or substitution compatibility. Both packaging formats deliver identical electrical specifications and performance characteristics.

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