10TQ045STRR Equivalent & Substitute Parts

Part Overview

The 10TQ045STRR is a Schottky rectifier diode rated for 45 V DC reverse voltage and 10 A average rectified current in a surface mount TO-263AB (D2PAK) package. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement. The diode exhibits fast recovery characteristics with a maximum forward voltage of 570 mV at 10 A and reverse leakage current of 2 mA at 45 V.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	45	V
Current - Average Rectified (Io)	10	A
Voltage - Forward (Vf) (Max) @ If	570 mV @ 10 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	2	mA @ 45 V
Mounting Type	Surface Mount
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Operating Temperature - Junction	-55 to 175	°C
Technology	Schottky

Substitute Part Grouping Explanation

Substitution of the 10TQ045STRR is determined by the following critical parameters: voltage rating (45 V DC reverse), current rating (10 A average rectified), forward voltage characteristics (570 mV @ 10 A), reverse leakage current (2 mA @ 45 V), package type (TO-263AB D2PAK), and fast recovery speed (≤ 500ns). Parts are grouped into two categories:

Parametric Equivalents maintain identical electrical specifications across all critical parameters, including forward voltage, reverse leakage, and current rating. These parts are direct functional replacements.

Manufacturer Recommended Alternatives share the same voltage and package specifications but may exhibit different forward voltage or reverse leakage characteristics. These parts are electrically compatible within the 45 V, 10 A application envelope but require circuit-level verification for forward voltage performance.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Ir @ Vr	Package	Product Status	RoHS Status
10TQ045STRR	Vishay General Semiconductor - Diodes Division	45 V	10 A	570 mV @ 10 A	2 mA @ 45 V	TO-263AB	Obsolete	RoHS Non-Compliant
VS-10TQ045S-M3	Vishay General Semiconductor - Diodes Division	45 V	10 A	570 mV @ 10 A	2 mA @ 45 V	TO-263AB	Active	ROHS3 Compliant
VS-10TQ045SHM3	Vishay General Semiconductor - Diodes Division	45 V	10 A	570 mV @ 10 A	2 mA @ 45 V	TO-263AB	Active	ROHS3 Compliant
10TQ045S	SMC Diode Solutions	45 V	10 A	570 mV @ 10 A	2 mA @ 45 V	TO-263AB	Active	ROHS3 Compliant
MBRB1045T4G	onsemi	45 V	10 A	840 mV @ 20 A	100 µA @ 45 V	TO-263AB	Obsolete	ROHS3 Compliant
STPS745G-TR	STMicroelectronics	45 V	7.5 A	840 mV @ 15 A	100 µA @ 45 V	TO-263AB	Active	ROHS3 Compliant

Engineering Selection Recommendations

Preferred Substitutes (Parametric Equivalents):

VS-10TQ045S-M3, VS-10TQ045SHM3, and 10TQ045S are parametric equivalents with identical electrical performance to the 10TQ045STRR. All three parts maintain 45 V reverse voltage, 10 A current rating, 570 mV forward voltage at 10 A, and 2 mA reverse leakage. These parts are active products with ROHS3 compliance, providing long-term availability and regulatory alignment.

VS-10TQ045SHM3 includes automotive-grade qualification (AEC-Q101), suitable for applications requiring automotive reliability standards.

Alternative Substitutes (Manufacturer Recommended):

MBRB1045T4G (onsemi) and STPS745G-TR (STMicroelectronics) are voltage and package compatible but exhibit different electrical characteristics. MBRB1045T4G maintains the 10 A current rating with higher forward voltage (840 mV @ 20 A) and higher reverse leakage (100 µA @ 45 V). STPS745G-TR is rated for 7.5 A current, which is below the 10 A requirement of the original part and is suitable only for applications with reduced current demands.

Both alternative substitutes are ROHS3 compliant. MBRB1045T4G is obsolete; STPS745G-TR is active.

Frequently Asked Questions (FAQ)

Q: Can VS-10TQ045S-M3 directly replace 10TQ045STRR without circuit modification?

A: Yes. VS-10TQ045S-M3 is a parametric equivalent with identical voltage rating (45 V), current rating (10 A), forward voltage (570 mV @ 10 A), and reverse leakage (2 mA @ 45 V). The part is packaged in TO-263AB and operates across the same temperature range (-55°C to 175°C).

Q: What is the difference between VS-10TQ045S-M3 and VS-10TQ045SHM3?

A: Both parts are parametric equivalents with identical electrical specifications. VS-10TQ045SHM3 includes automotive-grade qualification (AEC-Q101) and is designated for automotive applications. Selection depends on application requirements.

Q: Why is STPS745G-TR listed as a substitute if it has a lower current rating?

A: STPS745G-TR is listed as a manufacturer-recommended alternative due to voltage and package compatibility. However, the 7.5 A current rating is below the 10 A specification of the original part. This substitute is applicable only to circuits with reduced current demands or where the 10 A rating is not fully utilized.

Q: What are the compliance differences between 10TQ045STRR and its substitutes?

A: The original 10TQ045STRR is RoHS non-compliant and obsolete. All active substitutes (VS-10TQ045S-M3, VS-10TQ045SHM3, 10TQ045S, STPS745G-TR) are ROHS3 compliant. MBRB1045T4G is ROHS3 compliant but obsolete.

Q: Are there packaging differences between the substitute parts?

A: All substitute parts use the TO-263AB (D2PAK) package, identical to the original 10TQ045STRR. Packaging variations exist in tape format: VS-10TQ045S-M3 and VS-10TQ045SHM3 are supplied in tube packaging; 10TQ045S is supplied in tape and reel; MBRB1045T4G is supplied in cut tape and digi-reel; STPS745G-TR is supplied in tape and reel.

Q: How do forward voltage differences affect circuit performance?

A: The original 10TQ045STRR and its parametric equivalents (VS-10TQ045S-M3, VS-10TQ045SHM3, 10TQ045S) maintain 570 mV forward voltage at 10 A. MBRB1045T4G and STPS745G-TR exhibit 840 mV forward voltage at higher current levels (20 A and 15 A respectively). Higher forward voltage results in increased power dissipation and heat generation. Circuit thermal analysis is required when substituting with higher forward voltage parts.

Q: What is the significance of reverse leakage current differences?

A: The original part and parametric equivalents specify 2 mA reverse leakage at 45 V. MBRB1045T4G and STPS745G-TR specify 100 µA reverse leakage at 45 V. Higher reverse leakage increases standby power consumption and may affect circuit performance in low-power or precision applications. Verification is required for applications sensitive to leakage current.

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