Equivalent & Substitute Parts for 8TQ080S Schottky Diode

Part Overview

The 8TQ080S is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 80 V DC reverse voltage and 8 A average rectified current in a surface mount TO-263AB (D2PAK) package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and production applications. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts may offer enhanced performance characteristics or improved compliance status while remaining functionally compatible within the same application envelope.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	80	V
Current - Average Rectified (Io)	8	A
Voltage - Forward (Vf) (Max) @ If	720 mV @ 8 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	550 µA @ 80 V	µA
Technology	Schottky	—
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55°C ~ 175°C	°C

Substitute Part Grouping Explanation

Substitution of the 8TQ080S is determined by equivalence in the following critical parameters: voltage rating (80 V DC reverse), current rating (8 A average rectified), forward voltage drop (720 mV @ 8 A), switching speed (fast recovery ≤ 500ns), and package form factor (TO-263AB D2PAK surface mount). Parts are grouped into two categories:

Parametric Equivalents maintain all electrical specifications and package requirements while differing in product status, packaging format (tube versus tape & reel), or compliance certifications. These parts are direct functional replacements.

Manufacturer-Recommended Substitute offers enhanced voltage rating (100 V) and improved reverse leakage characteristics while maintaining the same current rating, forward voltage performance, switching speed, and package footprint. This part provides superior performance margin and is suitable for applications where higher voltage headroom is acceptable.

Parameter Comparison

Parameter	8TQ080S	VS-8TQ080S-M3	VS-8TQ080STRLHM3	VS-8TQ080STRRHM3	STPS8H100G-TR
Manufacturer	Vishay	Vishay	Vishay	Vishay	STMicroelectronics
Product Status	Obsolete	Active	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	80 V	80 V	80 V	80 V	100 V
Current - Average Rectified (Io)	8 A	8 A	8 A	8 A	8 A
Voltage - Forward (Vf) (Max) @ If	720 mV @ 8 A	720 mV @ 8 A	720 mV @ 8 A	720 mV @ 8 A	710 mV @ 8 A
Speed	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns
Current - Reverse Leakage @ Vr	550 µA @ 80 V	550 µA @ 80 V	550 µA @ 80 V	550 µA @ 80 V	4.5 µA @ 100 V
Package / Case	TO-263AB	TO-263AB	TO-263AB	TO-263AB	D2PAK
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	Max 175°C
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Bulk	Tube	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®
Automotive Grade	—	—	AEC-Q101	AEC-Q101	—

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

VS-8TQ080S-M3 is the primary parametric equivalent, offering identical electrical performance with active product status and ROHS3 compliance. This part is suitable for applications requiring exact specification matching and is available in tube packaging.

VS-8TQ080STRLHM3 and VS-8TQ080STRRHM3 are parametric equivalents with automotive-grade qualification (AEC-Q101) and tape & reel packaging. These parts are appropriate for automotive applications and high-volume production environments requiring automated assembly.

For Enhanced Performance:

STPS8H100G-TR is a manufacturer-recommended substitute offering 100 V reverse voltage rating and significantly reduced reverse leakage current (4.5 µA @ 100 V versus 550 µA @ 80 V). This part maintains identical current rating, forward voltage performance, and switching speed while providing improved voltage margin. The part is suitable for applications where higher voltage headroom is beneficial and reverse leakage reduction is advantageous. ROHS3 compliance is confirmed.

All substitute parts maintain surface mount D2PAK package compatibility and identical thermal operating range.

Frequently Asked Questions (FAQ)

Q: Can VS-8TQ080S-M3 be used as a direct replacement for 8TQ080S?

A: Yes. VS-8TQ080S-M3 maintains identical electrical specifications including 80 V reverse voltage, 8 A current rating, 720 mV forward voltage drop, and fast recovery switching characteristics. The part is functionally equivalent and compatible with existing PCB layouts and thermal management designs. The primary difference is active product status and ROHS3 compliance.

Q: What is the difference between the three Vishay parametric equivalents?

A: VS-8TQ080S-M3 is supplied in tube packaging for standard applications. VS-8TQ080STRLHM3 and VS-8TQ080STRRHM3 are supplied in tape & reel format with automotive-grade qualification (AEC-Q101), making them suitable for high-volume production and automotive applications. All three maintain identical electrical specifications.

Q: Can STPS8H100G-TR be used in place of 8TQ080S?

A: STPS8H100G-TR is functionally compatible for applications designed for 80 V operation. The part provides 100 V reverse voltage rating, allowing operation at higher voltage levels. Forward voltage drop is marginally lower (710 mV versus 720 mV @ 8 A), and reverse leakage is substantially reduced. The D2PAK package footprint is compatible with TO-263AB layouts. This part is suitable when enhanced voltage margin and lower leakage are beneficial.

Q: Are all substitute parts RoHS compliant?

A: The original 8TQ080S is RoHS non-compliant. All active substitute parts (VS-8TQ080S-M3, VS-8TQ080STRLHM3, VS-8TQ080STRRHM3, and STPS8H100G-TR) are ROHS3 compliant, meeting current environmental and regulatory requirements.

Q: What packaging options are available for production?

A: VS-8TQ080S-M3 is available in tube packaging for lower-volume applications. VS-8TQ080STRLHM3 and VS-8TQ080STRRHM3 are supplied in tape & reel format for automated assembly. STPS8H100G-TR is available in cut tape and Digi-Reel® format. Selection depends on production volume and assembly equipment compatibility.

Q: Do the automotive-grade parts (VS-8TQ080STRLHM3 and VS-8TQ080STRRHM3) differ electrically?

A: No. VS-8TQ080STRLHM3 and VS-8TQ080STRRHM3 maintain identical electrical specifications. Both carry AEC-Q101 automotive qualification and are supplied in tape & reel packaging. Selection between these parts depends on specific reel configuration requirements for production equipment.

Q: Is the operating temperature range identical across all parts?

A: Yes. All parts maintain -55°C to 175°C junction temperature operating range, ensuring thermal compatibility in existing designs.

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