B120AF-13 Equivalent & Substitute Parts

Part Overview

The B120AF-13 is an active Schottky rectifier diode manufactured by Diodes Incorporated, rated for 20 V DC reverse voltage and 1 A average rectified current in a surface mount SMAF package. This component is designed for fast recovery applications requiring low forward voltage drop characteristics. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring compatible Schottky diode functionality within the specified electrical and mechanical parameters.

Substiute Parts

B120AF-13

Diodes IncorporatedIn Stock: 2931B120AF-13 Datasheet

Current PartRFQ

SB12AFC_R1_00001

Panjit International Inc.In Stock: 3851SB12AFC_R1_00001 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the B120AF-13 are identified based on electrical and mechanical parameter equivalence. The substitution criteria are strictly limited to the following parameters:

• Voltage - DC Reverse (Vr) (Max): 20 V
• Current - Average Rectified (Io): 1 A
• Voltage - Forward (Vf) (Max) @ If: 500 mV @ 1 A
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Mounting Type: Surface Mount
• Package / Case: DO-221AC, SMA Flat Leads
• Operating Temperature - Junction: -55°C ~ 150°C
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Parts meeting these criteria are classified as parametric equivalents and may be substituted in applications where the B120AF-13 is specified, provided that minor variations in secondary parameters (such as reverse leakage current and junction capacitance) do not impact circuit performance.

Parameter Comparison

Engineering Selection Recommendations

Both the B120AF-13 and SB12AFC_R1_00001 are active products with equivalent electrical ratings and mechanical compatibility. Selection between these parts is based on the following factors:

Product Status and Compliance: Both parts maintain active product status and comply with ROHS3 and REACH requirements, ensuring regulatory compliance for current and future applications.

Inventory Availability: The B120AF-13 has 2889 pieces in stock, while the SB12AFC_R1_00001 has 3779 pieces in stock. Inventory levels may influence procurement decisions based on supply chain requirements.

Secondary Parameter Variations: The SB12AFC_R1_00001 exhibits a higher reverse leakage current (200 µA @ 20 V versus 100 µA @ 20 V) and slightly lower junction capacitance (45 pF versus 50 pF @ 4V, 1MHz). These variations remain within acceptable tolerances for standard rectifier applications and do not preclude substitution in circuits designed for the B120AF-13 specifications.

Package Designation: The B120AF-13 uses the SMAF package designation, while the SB12AFC_R1_00001 uses SMAF-C. Both conform to the DO-221AC physical standard with SMA flat leads, ensuring mechanical and electrical compatibility in PCB assembly.

Frequently Asked Questions (FAQ)

Q: Can the SB12AFC_R1_00001 be used as a direct replacement for the B120AF-13?

A: Yes. Both parts meet the core electrical specifications: 20 V reverse voltage rating, 1 A average rectified current, 500 mV maximum forward voltage at 1 A, and fast recovery characteristics. Both are surface mount components in the DO-221AC package with identical operating temperature ranges and compliance certifications.

Q: What is the significance of the different reverse leakage current values?

A: The B120AF-13 specifies 100 µA reverse leakage at 20 V, while the SB12AFC_R1_00001 specifies 200 µA. This difference reflects normal manufacturing variation within the Schottky diode technology. For most rectifier applications, both values are acceptable. Applications with stringent leakage requirements should evaluate circuit-level impact.

Q: Are there package compatibility concerns between SMAF and SMAF-C designations?

A: No. Both designations refer to variants of the DO-221AC package with SMA flat leads. The physical footprint and electrical interface are identical, ensuring PCB compatibility without layout modifications.

Q: Do both parts support the same operating temperature range?

A: Yes. Both the B120AF-13 and SB12AFC_R1_00001 operate across the junction temperature range of -55°C to 150°C, supporting identical thermal specifications.

Q: Are there regulatory or compliance differences between these parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity ratings. Regulatory requirements are equivalent.

Q: What is the basis for substitution between these two parts?

A: Substitution is based on matching electrical parameters (voltage rating, current rating, forward voltage, recovery speed) and mechanical compatibility (surface mount, DO-221AC package, identical footprint). Both parts are active products from established manufacturers with equivalent certifications.