STB12100 Equivalent & Substitute Parts

Part Overview

The STB12100 is an active Schottky rectifier diode manufactured by SMC Diode Solutions, rated for 100V DC reverse voltage and 12A average rectified current in a surface mount D2PAK package. This component is designed for high-speed switching applications requiring fast recovery characteristics (≤500ns) and low forward voltage drop. The part is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance can be maintained within the specified parameter ranges while accommodating application-specific constraints such as current requirements, thermal management, or supply chain availability.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	12	A
Voltage - Forward (Vf) (Max) @ If	750 mV @ 12 A	mV
Speed	Fast Recovery ≤500ns, >200mA (Io)	ns
Current - Reverse Leakage @ Vr	300	µA @ 100 V
Package / Case	TO-263-3, D2PAK (2 Leads + Tab)	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Schottky	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the STB12100 is determined by the following critical parameters:

Mandatory Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 100V
Package / Case: TO-263-3, D2PAK (2 Leads + Tab)
Technology: Schottky
Mounting Type: Surface Mount
Speed: Fast Recovery ≤500ns, >200mA (Io)

Allowable Variation Criteria:

Current - Average Rectified (Io): Equal to or greater than 12A
Voltage - Forward (Vf) (Max) @ If: Within acceptable operating range
Operating Temperature - Junction: Maximum rating ≥150°C
RoHS Status: ROHS3 Compliant

The STPS8H100G-TR is identified as a substitute part. While it maintains identical voltage rating, package configuration, and technology specifications, it operates at a reduced current rating of 8A compared to the 12A specification of the STB12100. This substitution is valid only for applications where the actual operating current does not exceed 8A.

Parameter Comparison

Parameter	STB12100	STPS8H100G-TR	Unit
Manufacturer	SMC Diode Solutions	STMicroelectronics	—
Voltage - DC Reverse (Vr) (Max)	100	100	V
Current - Average Rectified (Io)	12	8	A
Voltage - Forward (Vf) (Max) @ If	750 mV @ 12 A	710 mV @ 8 A	mV
Speed	Fast Recovery ≤500ns, >200mA (Io)	Fast Recovery ≤500ns, >200mA (Io)	ns
Current - Reverse Leakage @ Vr	300	4.5	µA @ 100 V
Package / Case	TO-263-3, D2PAK (2 Leads + Tab)	TO-263-3, D2PAK (2 Leads + Tab)	—
Operating Temperature - Junction (Max)	150	175	°C
Technology	Schottky	Schottky	—
Mounting Type	Surface Mount	Surface Mount	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	—

Engineering Selection Recommendations

STB12100 (Primary Selection)

The STB12100 is the specified component for applications requiring 12A average rectified current at 100V reverse voltage. This part maintains active product status with 973 units in stock. ROHS3 compliance and REACH affected status confirm regulatory alignment for industrial and commercial applications.

STPS8H100G-TR (Substitute Selection)

The STPS8H100G-TR is a valid substitute for applications where the actual operating current does not exceed 8A. This part is manufactured by STMicroelectronics and maintains identical voltage rating, package configuration, and fast recovery speed characteristics. The substitute offers superior maximum junction temperature rating (175°C vs. 150°C) and lower reverse leakage current (4.5µA vs. 300µA @ 100V). ROHS3 compliance is maintained. Inventory availability is significantly higher at 7000 units.

Selection between these parts must be based on actual circuit current requirements. The STB12100 is mandatory for applications requiring the full 12A rating. The STPS8H100G-TR is suitable only when circuit design confirms maximum operating current at or below 8A.

Frequently Asked Questions (FAQ)

Q: Can the STPS8H100G-TR replace the STB12100 in all applications?

A: No. The STPS8H100G-TR is rated for 8A average rectified current, while the STB12100 is rated for 12A. Substitution is valid only when the actual circuit operating current does not exceed 8A. Exceeding this current rating will result in component failure.

Q: Are the D2PAK packages identical between these parts?

A: Yes. Both parts use the TO-263-3 D2PAK (2 Leads + Tab) package configuration. PCB footprints and thermal management characteristics are equivalent.

Q: What is the difference in forward voltage drop between these parts?

A: The STB12100 has a maximum forward voltage of 750mV @ 12A, while the STPS8H100G-TR has 710mV @ 8A. Forward voltage specifications are rated at their respective current levels and are not directly comparable across different current ratings.

Q: Do both parts meet the same regulatory requirements?

A: Both parts are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity). The STB12100 is REACH affected, while the STPS8H100G-TR is REACH unaffected. Regulatory requirements for your specific application determine which status is applicable.

Q: What is the advantage of the STPS8H100G-TR regarding temperature?

A: The STPS8H100G-TR has a maximum junction temperature rating of 175°C compared to 150°C for the STB12100. This provides additional thermal margin in high-temperature operating environments, provided the 8A current limit is not exceeded.

Q: How do reverse leakage currents compare?

A: The STB12100 has 300µA reverse leakage @ 100V, while the STPS8H100G-TR has 4.5µA @ 100V. Lower leakage current in the substitute part reduces standby power dissipation in applications with sustained reverse bias conditions.

Q: Are these parts interchangeable in terms of speed characteristics?

A: Yes. Both parts specify fast recovery ≤500ns for currents >200mA (Io). Recovery speed characteristics are identical and suitable for the same switching frequency applications.

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