MBR1035 Equivalent & Substitute Parts

Part Overview

The MBR1035 is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 35 V DC reverse voltage and 10 A average rectified current in a through-hole TO-220AC package. This component is classified as obsolete, making identification of equivalent substitute parts necessary for ongoing design support and procurement continuity. The MBR1035 operates across a junction temperature range of -65°C to 150°C and exhibits fast recovery characteristics suitable for high-frequency rectification applications.

Substiute Parts

MBR1035

Vishay General Semiconductor - Diodes DivisionIn Stock: 1153MBR1035 Datasheet

Current PartRFQ

STPS1045D

STMicroelectronicsIn Stock: 55269STPS1045D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBR1035 is determined by the following critical electrical and mechanical parameters:

Mandatory Compatibility Criteria:

• Technology: Schottky diode
• Mounting Type: Through Hole
• Package / Case: TO-220-2
• Current - Average Rectified (Io): 10 A minimum
• Voltage - DC Reverse (Vr): Equal to or greater than 35 V
• Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)

The STPS1045D from STMicroelectronics satisfies all mandatory compatibility criteria. It maintains the same 10 A current rating, through-hole TO-220AC mounting configuration, and fast recovery Schottky technology. The STPS1045D provides a higher reverse voltage rating of 45 V, which is compatible with applications designed for the 35 V MBR1035, as higher voltage-rated components operate safely in lower voltage applications.

Parameter Comparison

Engineering Selection Recommendations

The STPS1045D is the direct substitute for the obsolete MBR1035. Selection of this substitute is based on the following engineering factors:

Product Status: The MBR1035 is classified as obsolete, whereas the STPS1045D maintains active product status with substantial inventory availability (55,200 pcs in stock versus 1,120 pcs for the MBR1035). Active status ensures long-term supply chain reliability and continued manufacturer support.

Regulatory Compliance: The STPS1045D is ROHS3 compliant, whereas the MBR1035 is RoHS non-compliant. For applications subject to RoHS directives, the STPS1045D provides regulatory alignment. Both components are REACH Unaffected and classified under ECCN EAR99.

Electrical Performance: The STPS1045D provides a 10 V higher reverse voltage rating (45 V versus 35 V), which is compatible with the MBR1035 application space. The forward voltage drop increases by 30 mV (600 mV versus 570 mV at 10 A), a minor variance within typical circuit design tolerances. Maximum junction temperature rating increases from 150°C to 175°C, providing enhanced thermal margin.

Physical Compatibility: Both components utilize identical TO-220-2 package geometry and through-hole mounting configuration, enabling direct mechanical substitution without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can the STPS1045D directly replace the MBR1035 without circuit modification?

A: Yes. The STPS1045D is mechanically and electrically compatible with the MBR1035. Both components share identical TO-220-2 package dimensions, 10 A current rating, and fast recovery Schottky technology. The higher 45 V reverse voltage rating of the STPS1045D is compatible with circuits designed for 35 V operation.

Q: What is the significance of the 30 mV forward voltage difference between these parts?

A: The forward voltage drop of the STPS1045D is 600 mV at 10 A, compared to 570 mV for the MBR1035. This 30 mV difference represents approximately 5% variance and is within typical circuit design margins for rectifier applications. Power dissipation increases proportionally with forward voltage; thermal analysis should account for this minor increase in high-current applications.

Q: Why is the STPS1045D rated for 45 V instead of 35 V?

A: The STPS1045D is a higher voltage-rated variant within the same product family. Higher voltage ratings do not restrict operation at lower voltages; they simply provide additional safety margin and design flexibility. A 45 V rated diode operates safely in 35 V applications.

Q: Are there packaging differences between the MBR1035 and STPS1045D?

A: Both components are supplied in TO-220-2 through-hole packages. The MBR1035 supplier device package is designated TO-220AC, and the STPS1045D is also supplied in TO-220AC configuration. No package conversion or adapter is required for substitution.

Q: What is the impact of the increased maximum junction temperature rating?

A: The STPS1045D maximum junction temperature is 175°C, compared to 150°C for the MBR1035. This 25°C increase provides additional thermal headroom in applications operating near temperature limits. For most standard rectifier applications, this difference is not a primary selection criterion.

Q: Is the STPS1045D suitable for RoHS-compliant applications?

A: Yes. The STPS1045D is ROHS3 compliant, whereas the MBR1035 is RoHS non-compliant. For designs requiring RoHS compliance, the STPS1045D satisfies regulatory requirements.

Q: How do the reverse leakage currents compare?

A: The MBR1035 exhibits 100 µA reverse leakage at 35 V, while the STPS1045D exhibits 100 µA reverse leakage at 45 V. Leakage current is measured at the respective maximum rated voltages. At equivalent voltage levels, leakage characteristics are comparable.