SS19 Schottky Diode 90V 1A DO-214AC Equivalent & Substitute Parts

Part Overview

The SS19 is an active Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 90V DC reverse voltage and 1A average rectified current in a surface mount DO-214AC (SMA) package. This component is designed for fast recovery applications requiring low forward voltage drop and rapid switching characteristics. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design optimization needs.

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	100 µA @ 90 V	µA
Operating Temperature - Junction	-55°C ~ 150°C	°C
Mounting Type	Surface Mount	-
Package / Case	DO-214AC, SMA	-
Technology	Schottky	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the SS19 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Voltage - DC Reverse (Vr) rating must equal or exceed 90V
Current - Average Rectified (Io) must equal or exceed 1A
Technology must be Schottky type
Speed classification must maintain Fast Recovery characteristics (≤ 500ns, > 200mA)
Forward voltage drop (Vf) should not significantly exceed 800 mV @ 1A to preserve circuit efficiency

Mechanical Compatibility Criteria:

Mounting type must be Surface Mount
Package must be compatible with DO-214AC footprint or equivalent surface mount package
Operating temperature range must support -55°C to 150°C junction temperature operation

Compliance Requirements:

RoHS3 compliance required
MSL rating of 1 (Unlimited) required
REACH Unaffected status required

The STPS1H100U from STMicroelectronics meets these substitution criteria with equivalent or superior electrical ratings and compatible surface mount packaging.

Parameter Comparison

Parameter	SS19 (Main Part)	STPS1H100U (Substitute)	Compatibility
Manufacturer	Taiwan Semiconductor Corporation	STMicroelectronics	Different manufacturer
Voltage - DC Reverse (Vr) (Max)	90 V	100 V	Substitute rated higher
Current - Average Rectified (Io)	1 A	1 A	Equivalent
Voltage - Forward (Vf) (Max) @ If	800 mV @ 1 A	770 mV @ 1 A	Substitute lower (improved)
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Equivalent
Current - Reverse Leakage @ Vr	100 µA @ 90 V	4 µA @ 100 V	Substitute significantly lower
Operating Temperature - Junction (Max)	150°C	175°C	Substitute rated higher
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package / Case	DO-214AC, SMA	DO-214AA, SMB	Different package footprint
Technology	Schottky	Schottky	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Equivalent
REACH Status	REACH Unaffected	REACH Unaffected	Equivalent

Engineering Selection Recommendations

SS19 Selection: The SS19 is appropriate for applications requiring the DO-214AC (SMA) surface mount package footprint. This component maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity rating, suitable for standard manufacturing environments.

STPS1H100U Selection: The STPS1H100U provides electrical performance equivalent to or exceeding the SS19 across all critical parameters: higher reverse voltage rating (100V vs. 90V), lower forward voltage drop (770 mV vs. 800 mV @ 1A), significantly lower reverse leakage current (4 µA vs. 100 µA @ rated voltage), and higher maximum junction temperature (175°C vs. 150°C). This component maintains active product status with identical RoHS3 compliance and unlimited moisture sensitivity rating.

Package Consideration: The STPS1H100U uses DO-214AA (SMB) package, which differs from the SS19 DO-214AC (SMA) package. PCB layout and footprint modifications are required for substitution. Both packages are surface mount configurations with different physical dimensions and land patterns.

Frequently Asked Questions (FAQ)

Q: Can the STPS1H100U directly replace the SS19 without PCB modification?

A: No. The SS19 uses DO-214AC (SMA) package while the STPS1H100U uses DO-214AA (SMB) package. These packages have different physical dimensions and PCB footprints. PCB layout redesign is required for substitution.

Q: What are the electrical advantages of the STPS1H100U over the SS19?

A: The STPS1H100U provides three measurable electrical improvements: 10V higher reverse voltage rating (100V vs. 90V), 30 mV lower forward voltage drop at 1A (770 mV vs. 800 mV), and 96 µA lower reverse leakage current at rated voltage (4 µA vs. 100 µA @ 90V).

Q: Are both parts compliant with current regulatory requirements?

A: Yes. Both the SS19 and STPS1H100U are RoHS3 compliant, REACH Unaffected, and carry MSL rating of 1 (Unlimited), meeting current environmental and regulatory standards.

Q: What is the temperature operating range difference between these parts?

A: The SS19 operates from -55°C to 150°C junction temperature. The STPS1H100U operates to a maximum junction temperature of 175°C, providing 25°C additional thermal margin.

Q: Are both parts classified as Schottky diodes with fast recovery characteristics?

A: Yes. Both components are Schottky technology diodes with identical fast recovery speed classification (≤ 500ns, > 200mA), suitable for applications requiring rapid switching and low forward voltage drop.

Q: What inventory status applies to these parts?

A: The SS19 has 15,200 pieces in stock. The STPS1H100U has 27,600 pieces in stock, providing greater availability for high-volume applications.

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