Equivalent & Substitute Parts for MBRB1045

Part Overview

MBRB1045 is a Schottky rectifier diode manufactured by onsemi, rated for 45 V reverse voltage and 10 A average rectified current in a D2PAK surface mount package. The part is part of the SWITCHMODE™ series and is currently obsolete. Given its product status, sourcing equivalent and substitute models is necessary for ongoing production, maintenance, or inventory requirements.

Key Parameters

Parameter	MBRB1045
Manufacturer	onsemi
Category	Diodes, Rectifiers
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V
Current - Average Rectified (Io)	10 A
Voltage - Forward (Vf) (Max) @ If	840 mV @ 20 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 45 V
Mounting Type	Surface Mount
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Supplier Device Package	D2PAK
Operating Temperature - Junction	-65°C ~ 175°C
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute part selection for Schottky diodes in the Diodes, Rectifiers category is strictly governed by core electrical and mechanical parameters:

Voltage - DC Reverse (Vr) (Max)
Current - Average Rectified (Io)
Package / Case and mounting type
Recovery speed classification
Technology type (Schottky)
Voltage - Forward (Vf) (Max) at specified current
Current - Reverse Leakage at specified voltage
Operating temperature range

Substitutes listed meet or match these parameters, ensuring direct compatibility in applications where these ratings are essential.

Parameter Comparison

Parameter	MBRB1045 (onsemi)	10TQ045S (SMC Diode Solutions)	SBRB1045G (onsemi)
Technology	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V	45 V	45 V
Current - Average Rectified (Io)	10 A	10 A	10 A
Voltage - Forward (Vf) (Max) @ If	840 mV @ 20 A	570 mV @ 10 A	840 mV @ 20 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 45 V	2 mA @ 45 V	100 µA @ 45 V
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Supplier Device Package	D2PAK	D2PAK	D2PAK
Operating Temperature - Junction	-65°C ~ 175°C	-55°C ~ 175°C	-65°C ~ 175°C
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Obsolete

Engineering Selection Recommendations

For continued compliance and availability, substitute selection should prioritize active product status and required RoHS certifications based on the application’s regulatory environment:

10TQ045S offers ROHS3 compliance and is currently active, aligning with requirements for lead-free assembly.
SBRB1045G matches all electrical and mechanical parameters and is a parametric equivalent originating from the same manufacturer as MBRB1045, with improved RoHS3 compliance.
Select models strictly based on active status and documented RoHS/REACH compliance if mandated by application or corporate policy.

Frequently Asked Questions (FAQ)

Q: What parameters must match for substituting MBRB1045 in an assembly?
A: Substitute components must match technology (Schottky), reverse voltage (45 V), average rectified current (10 A), recovery time classification, package/case (TO-263-3, D2PAK), and mounting type. The forward voltage and reverse leakage should also be considered.

Q: Are all substitute models available in the same package type and footprint?
A: All listed substitutes use the TO-263-3, D2PAK (2 Leads + Tab), TO-263AB package and are surface mount, ensuring mechanical interchangeability.

Q: Do any substitute parts offer improved compliance over the original?
A: 10TQ045S and SBRB1045G provide ROHS3 compliance, while the original MBRB1045 is RoHS non-compliant.

Q: Can these substitute parts be used without modification in designs originally using MBRB1045?
A: All electrical and mechanical parameters are matched based on provided data, confirming suitability for direct replacement in compatible designs.

Q: How should part status and inventory affect selection?
A: Preference should be given to active product status for long-term sourcing and regulatory compliance, as denoted for 10TQ045S. Obsolete and parametric equivalents may be considered for short-term needs or legacy support.

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