MBR1050 Equivalent & Substitute Parts

Part Overview

The MBR1050 is a Schottky rectifier diode rated for 50 V DC reverse voltage and 10 A average rectified current in a Through Hole TO-220AC package. This component is classified as Obsolete, necessitating identification of active equivalent alternatives for continued system design and procurement. Substitute parts must maintain electrical compatibility within the specified voltage and current parameters while accommodating the Through Hole mounting requirement.

Substiute Parts

MBR1050

Diodes IncorporatedIn Stock: 2039MBR1050 Datasheet

Current PartRFQ

MBR1045-BP

Micro Commercial CoIn Stock: 864MBR1045-BP Datasheet

MFR RecommendedRFQ

MBR1045G

onsemiIn Stock: 50266MBR1045G Datasheet

MFR RecommendedRFQ

STPS1045D

STMicroelectronicsIn Stock: 55269STPS1045D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MBR1050 are selected based on the following substitution criteria:

Mandatory Compatibility Parameters:

• Technology: Schottky (all substitutes)
• Mounting Type: Through Hole (all substitutes)
• Package / Case: TO-220-2 (all substitutes)
• Current - Average Rectified (Io): 10 A (all substitutes)
• Current - Reverse Leakage @ Vr: 100 µA (all substitutes)

Allowable Variation:

• Voltage - DC Reverse (Vr) (Max): Substitutes rated at 45 V are acceptable for applications where the MBR1050's 50 V rating is not a limiting design constraint. The 45 V rating provides sufficient margin for standard rectification applications operating below this threshold.
• Operating Temperature Range: Substitutes with extended or equivalent temperature ranges maintain thermal performance requirements.
• Speed Characteristics: All substitutes maintain Fast Recovery specifications consistent with the original part.

All identified substitutes are Active products with current manufacturing status, ensuring long-term availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

MBR1045-BP (Micro Commercial Co): Active product status ensures current availability. Maintains 10 A current rating and Through Hole TO-220-2 package compatibility. Operating temperature range of -55°C to 150°C covers standard industrial applications. REACH Unaffected status simplifies regulatory compliance for new designs. Suitable for applications where the 45 V rating satisfies design requirements.

MBR1045G (onsemi): Active product with SWITCHMODE™ series designation and highest inventory availability (50,200 pcs). Extended operating temperature range of -65°C to 175°C provides thermal margin beyond the original MBR1050 specification. ROHS3 Compliant and REACH Unaffected. Fast Recovery speed specification matches the original part. Recommended for designs requiring extended temperature performance or long-term supply assurance.

STPS1045D (STMicroelectronics): Active product with ROHS3 Compliance and REACH Unaffected status. Lowest forward voltage specification (600 mV @ 10 A) compared to other substitutes, resulting in reduced power dissipation. Fast Recovery speed specification consistent with original part. Maximum junction temperature of 175°C supports thermal-demanding applications. Suitable for efficiency-critical designs where forward voltage characteristics are a primary selection criterion.

All three substitutes operate at 45 V maximum reverse voltage, which is acceptable for applications where the MBR1050's 50 V rating is not a design-limiting constraint. Selection among substitutes should be based on specific application requirements including thermal performance, forward voltage losses, and supply chain considerations.

Frequently Asked Questions (FAQ)

Q: Can the MBR1045-BP, MBR1045G, or STPS1045D be used as direct replacements for the MBR1050?

A: Yes, all three substitutes are compatible for applications where the 45 V reverse voltage rating is sufficient. The MBR1050 is rated for 50 V maximum reverse voltage, while substitutes are rated for 45 V. Direct substitution is valid when circuit design margins accommodate the lower voltage rating. All substitutes maintain the 10 A current rating, Schottky technology, Through Hole mounting, and TO-220-2 package configuration.

Q: What is the primary difference between the three substitute options?

A: The substitutes differ in forward voltage characteristics, operating temperature ranges, and manufacturer. The STPS1045D exhibits the lowest forward voltage (600 mV @ 10 A), resulting in lower power dissipation. The MBR1045G offers the widest operating temperature range (-65°C to 175°C). The MBR1045-BP provides a mid-range option with standard temperature performance. All maintain identical current ratings and package specifications.

Q: Are there compliance or regulatory differences between the substitutes?

A: The MBR1050 is REACH Affected, while all three substitutes are REACH Unaffected. All substitutes are ROHS3 Compliant (MBR1045-BP compliance status not specified in available data). For new designs subject to REACH regulations, the substitutes provide simplified compliance pathways.

Q: Does the 45 V rating of substitutes create any compatibility issues?

A: The 45 V rating is acceptable for standard rectification applications operating below this threshold. Applications requiring the full 50 V reverse voltage capability of the original MBR1050 must evaluate circuit design margins. In most power supply and rectification circuits, 45 V provides adequate safety margin for nominal operating conditions.

Q: How do the speed characteristics compare?

A: The MBR1050 and three substitutes (MBR1045G and STPS1045D) all specify Fast Recovery ≤ 500ns for currents > 200mA (Io). The MBR1045-BP specifies "No Recovery Time > 500mA (Io)" without explicit nanosecond specification. For applications requiring defined fast recovery characteristics, MBR1045G and STPS1045D provide explicit performance matching.

Q: What packaging considerations apply to these substitutes?

A: All substitutes use Through Hole TO-220-2 package configuration, maintaining mechanical and thermal interface compatibility with the MBR1050. MBR1045-BP is supplied in Bulk packaging, MBR1045G in Tube packaging, and STPS1045D in Tube packaging. Packaging format does not affect electrical or mechanical compatibility; selection depends on procurement and handling requirements.

Q: Which substitute offers the best long-term supply assurance?

A: The MBR1045G demonstrates the highest inventory availability (50,200 pcs) and Active product status with onsemi manufacturing support. This combination provides the strongest long-term supply continuity for production designs requiring sustained component availability.