B120-M3/5AT Equivalent & Substitute Parts

Part Overview

The B120-M3/5AT is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 20 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are identified when alternative components meet or exceed the electrical and mechanical specifications of the original part, enabling procurement flexibility, inventory optimization, and supply chain continuity without compromising circuit performance.

Substiute Parts

B120-M3/5AT

Vishay General Semiconductor - Diodes DivisionIn Stock: 842B120-M3/5AT Datasheet

Current PartRFQ

B120Q-13-F

Diodes IncorporatedIn Stock: 25426B120Q-13-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the B120-M3/5AT is determined by equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): 20 V minimum
• Current - Average Rectified (Io): 1 A minimum
• Voltage - Forward (Vf) (Max) @ If: 520 mV or lower @ 1 A
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 200 µA or lower @ 20 V

Mechanical Equivalence Criteria:

• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Operating Temperature - Junction: -65°C to 150°C minimum

Compliance Equivalence Criteria:

• RoHS Status: ROHS3 Compliant
• Technology: Schottky

The B120Q-13-F from Diodes Incorporated meets all electrical and mechanical substitution criteria and maintains full compliance with RoHS3 and REACH requirements.

Parameter Comparison

Engineering Selection Recommendations

B120Q-13-F (Diodes Incorporated) - Primary Substitute

The B120Q-13-F is a direct functional equivalent to the B120-M3/5AT. Both components are Active product status and maintain full RoHS3 compliance. The B120Q-13-F demonstrates superior forward voltage performance (500 mV vs. 520 mV @ 1 A), resulting in lower power dissipation in rectification applications. The reverse leakage current specification of 500 µA @ 20 V is within acceptable operational margins for Schottky diode applications and does not compromise circuit performance in standard rectification, power supply, or protection circuit configurations.

The B120Q-13-F carries AEC-Q101 automotive qualification, indicating compliance with automotive-grade reliability standards. Both components share identical package geometry (DO-214AC, SMA), operating temperature range (-65°C to 150°C), and moisture sensitivity classification (MSL 1 - Unlimited).

Selection between the original B120-M3/5AT and the B120Q-13-F is determined by availability, procurement lead time, and cost considerations. No functional or compliance trade-offs exist between these components for standard Schottky rectifier applications.

Frequently Asked Questions (FAQ)

Q: Can the B120Q-13-F replace the B120-M3/5AT in all applications?

A: Yes. Both components are Schottky rectifier diodes with identical voltage and current ratings (20 V, 1 A), matching package geometry (DO-214AC, SMA), and equivalent operating temperature ranges (-65°C to 150°C). The B120Q-13-F exhibits superior forward voltage characteristics (500 mV vs. 520 mV @ 1 A), which reduces power dissipation. Both maintain RoHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Q: What is the difference in reverse leakage current between these parts?

A: The B120-M3/5AT specifies 200 µA @ 20 V reverse leakage, while the B120Q-13-F specifies 500 µA @ 20 V. This difference is within normal Schottky diode manufacturing tolerances and does not impact performance in rectification, power supply, or protection circuit applications. The higher leakage specification of the B120Q-13-F remains acceptable for standard industrial and commercial applications.

Q: Are the packages physically identical?

A: Yes. Both components use the DO-214AC (SMA) surface mount package. PCB footprints, solder pad dimensions, and mounting procedures are identical. No layout or assembly modifications are required when substituting between these parts.

Q: Do both parts meet automotive qualification standards?

A: The B120Q-13-F carries AEC-Q101 automotive qualification. The B120-M3/5AT does not list automotive qualification in the provided specifications. If automotive-grade certification is a circuit requirement, the B120Q-13-F is the appropriate selection.

Q: What is the forward voltage difference in practical terms?

A: The B120Q-13-F forward voltage is 20 mV lower than the B120-M3/5AT (500 mV vs. 520 mV @ 1 A). In a 1 A rectification circuit, this translates to approximately 20 mW lower power dissipation per diode, resulting in reduced heat generation and improved thermal efficiency.

Q: Are there any compliance or regulatory differences?

A: Both components are RoHS3 compliant, REACH unaffected, and classified under ECCN EAR99 and HTSUS 8541.10.0080. No regulatory or compliance trade-offs exist between these parts. The B120Q-13-F includes additional AEC-Q101 automotive qualification.