20TQ045STRR Schottky Diode Equivalent & Substitute Parts

Part Overview

The 20TQ045STRR is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 45 V DC reverse voltage and 20 A average rectified current in a surface mount TO-263AB (D2PAK) package. This part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for continued system support and new design implementations.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	45 V
Current - Average Rectified (Io)	20 A
Voltage - Forward (Vf) (Max) @ If	570 mV @ 20 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	2.7 mA @ 45 V
Capacitance @ Vr, F	1400 pF @ 5V, 1MHz
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Operating Temperature - Junction	-55°C ~ 150°C
Technology	Schottky
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution of the 20TQ045STRR is determined by strict equivalence across the following critical parameters: reverse voltage rating (45 V), average rectified current capacity (20 A), forward voltage drop (570 mV @ 20 A), fast recovery speed characteristic (≤ 500ns, > 200mA), reverse leakage current (2.7 mA @ 45 V), junction capacitance (1400 pF @ 5V, 1MHz), and package configuration (TO-263AB D2PAK). All substitute parts identified maintain these electrical and mechanical specifications without deviation. Substitutes are grouped by product status and compliance certifications, with active parts preferred for new designs and obsolete parts suitable for legacy system maintenance where inventory permits.

Parameter Comparison

Part Number	Manufacturer	Product Status	Vr (Max)	Io	Vf (Max) @ If	Speed	Ir @ Vr	Capacitance @ Vr, F	Package	Tj (Operating)	RoHS Status
20TQ045STRR	Vishay General Semiconductor - Diodes Division	Obsolete	45 V	20 A	570 mV @ 20 A	Fast Recovery ≤ 500ns, > 200mA	2.7 mA @ 45 V	1400 pF @ 5V, 1MHz	TO-263AB	-55°C ~ 150°C	RoHS non-compliant
VS-20TQ045STRLHM3	Vishay General Semiconductor - Diodes Division	Active	45 V	20 A	570 mV @ 20 A	Fast Recovery ≤ 500ns, > 200mA	2.7 mA @ 45 V	1400 pF @ 5V, 1MHz	TO-263AB	-55°C ~ 150°C	ROHS3 Compliant
VS-20TQ045STRRHM3	Vishay General Semiconductor - Diodes Division	Active	45 V	20 A	570 mV @ 20 A	Fast Recovery ≤ 500ns, > 200mA	2.7 mA @ 45 V	1400 pF @ 5V, 1MHz	TO-263AB	-55°C ~ 150°C	ROHS3 Compliant
20TQ045S	Vishay General Semiconductor - Diodes Division	Obsolete	45 V	20 A	570 mV @ 20 A	Fast Recovery ≤ 500ns, > 200mA	2.7 mA @ 45 V	1400 pF @ 5V, 1MHz	TO-263AB	-55°C ~ 150°C	RoHS non-compliant

Engineering Selection Recommendations

For new design implementations, VS-20TQ045STRLHM3 and VS-20TQ045STRRHM3 are the primary substitutes for the obsolete 20TQ045STRR. Both parts are active products with ROHS3 compliance and AEC-Q101 automotive qualification, providing regulatory alignment and supply chain continuity. These parts maintain identical electrical performance across all specified parameters while offering improved compliance status.

The 20TQ045S represents an alternative obsolete equivalent with identical electrical specifications to the main part but without the enhanced compliance certifications of the active substitutes. This part is suitable for legacy system maintenance where existing inventory is available.

Selection between VS-20TQ045STRLHM3 and VS-20TQ045STRRHM3 depends on specific supply chain requirements and inventory availability, as both parts are electrically and mechanically equivalent with identical compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can VS-20TQ045STRLHM3 and VS-20TQ045STRRHM3 be used interchangeably with 20TQ045STRR?

A: Yes. Both active substitutes maintain identical electrical specifications including reverse voltage (45 V), rectified current (20 A), forward voltage drop (570 mV @ 20 A), and package configuration (TO-263AB). The primary differences are product status (active vs. obsolete) and compliance certifications (ROHS3 and AEC-Q101).

Q: What is the difference between the active substitute parts?

A: VS-20TQ045STRLHM3 and VS-20TQ045STRRHM3 are electrically and mechanically identical. Both are active products with ROHS3 compliance and AEC-Q101 automotive qualification. Selection between them is based on supplier availability and inventory status.

Q: Is the 20TQ045S a suitable replacement for 20TQ045STRR?

A: The 20TQ045S is electrically equivalent with identical specifications. However, it is classified as obsolete and lacks the ROHS3 compliance and automotive qualification of the active substitutes. Use this part only for legacy system maintenance where existing inventory is available.

Q: Are there any package or mounting differences between these parts?

A: No. All parts use the TO-263AB (D2PAK) surface mount package with identical pinout and thermal characteristics. Direct PCB substitution is supported without layout modifications.

Q: What compliance certifications apply to the substitute parts?

A: VS-20TQ045STRLHM3 and VS-20TQ045STRRHM3 are ROHS3 compliant and AEC-Q101 qualified. The original 20TQ045STRR and 20TQ045S are RoHS non-compliant. All parts are REACH unaffected and classified as EAR99 for export control purposes.

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