B370-13 Schottky Diode Equivalent & Substitute Parts

Part Overview

The B370-13 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 70 V DC reverse voltage and 3 A average rectified current in a Surface Mount SMC (DO-214AB) package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent alternatives for ongoing design support and procurement. Substitute parts must maintain electrical performance within the specified voltage, current, and thermal operating ranges while accommodating package and compliance requirements.

Substiute Parts

B370-13

Diodes IncorporatedIn Stock: 850B370-13 Datasheet

Current PartRFQ

B370-13-F

Diodes IncorporatedIn Stock: 5276B370-13-F Datasheet

DirectRFQ

SS38

MDDIn Stock: 16419SS38 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the B370-13 are classified based on electrical parameter compatibility and product availability status. The primary substitution criteria are:

Electrical Compatibility Parameters:

• Schottky diode technology
• Voltage rating equal to or greater than 70 V DC reverse
• Current rating equal to or greater than 3 A average rectified
• Forward voltage drop within acceptable operating margins
• Fast recovery speed characteristic (≤ 500ns)
• Reverse leakage current specification

Mechanical and Compliance Parameters:

• Surface Mount mounting type
• Compatible package footprint (SMC or equivalent SMA)
• Operating temperature range encompassing -55°C to 125°C minimum
• RoHS3 compliance status for new designs
• Moisture Sensitivity Level 1 (Unlimited)

Substitutes are grouped into two categories: direct equivalents maintaining identical electrical specifications and package form factor, and functional equivalents with enhanced ratings or alternative packages that satisfy circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

B370-13-F (Diodes Incorporated): This part is the direct equivalent to B370-13, maintaining identical electrical specifications (70 V, 3 A, 790 mV forward voltage, 100pF capacitance) and package form factor (DO-214AB, SMC). The B370-13-F is currently in active production status with 5225 units in stock and carries ROHS3 compliance certification. This part is the primary substitute for new designs and ongoing procurement where the original B370-13 is no longer available.

SS38 (MDD): This part functions as an alternative substitute with enhanced voltage rating (80 V versus 70 V) and extended operating temperature range (-55°C to 150°C versus -55°C to 125°C). The SS38 maintains the 3 A current rating and fast recovery speed characteristic. The package differs (DO-214AC, SMA versus DO-214AB, SMC), requiring PCB layout verification. The SS38 exhibits higher capacitance (300pF versus 100pF), which may affect high-frequency circuit performance. This part is suitable for applications where the higher voltage margin and extended temperature range provide design benefits and the package change is accommodated.

Both substitute parts carry ROHS3 compliance and REACH Unaffected status, supporting modern regulatory requirements. Selection between B370-13-F and SS38 depends on package compatibility, thermal requirements, and capacitance sensitivity in the target application.

Frequently Asked Questions (FAQ)

Q: Can B370-13-F be used as a direct replacement for B370-13?

A: Yes. The B370-13-F is electrically and mechanically identical to B370-13, with identical voltage rating (70 V), current rating (3 A), forward voltage (790 mV @ 3 A), and package (DO-214AB, SMC). The primary difference is product status: B370-13-F is active and ROHS3 compliant, while B370-13 is discontinued and RoHS non-compliant.

Q: What are the key differences between B370-13-F and SS38?

A: B370-13-F and SS38 differ in voltage rating (70 V versus 80 V), operating temperature range (-55 to 125°C versus -55 to 150°C), package type (SMC versus SMA), and capacitance (100pF versus 300pF). Both maintain 3 A current rating and fast recovery speed. The SS38 provides higher voltage margin and temperature headroom but requires package footprint verification.

Q: Does the SS38 package change (SMA versus SMC) affect circuit performance?

A: Package changes require PCB layout verification. The SMA (DO-214AC) and SMC (DO-214AB) packages have different footprints and lead configurations. Physical board space, thermal dissipation paths, and trace routing must be evaluated. Electrical performance is not affected by package type alone, but thermal management characteristics may differ.

Q: Why does SS38 have higher capacitance (300pF versus 100pF)?

A: Capacitance differences result from different semiconductor junction designs and package geometries between manufacturers. Higher capacitance may affect switching speed and high-frequency performance. Applications sensitive to junction capacitance should evaluate SS38 performance in circuit simulation or prototype testing.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both B370-13-F and SS38 carry ROHS3 compliance certification. The original B370-13 is RoHS non-compliant. For new designs and applications subject to RoHS requirements, B370-13-F or SS38 are required.

Q: Which substitute part should be selected for new designs?

A: B370-13-F is the recommended substitute for new designs requiring direct compatibility with existing B370-13 designs. It maintains identical electrical and mechanical specifications with active product status and ROHS3 compliance. SS38 is suitable when the higher voltage rating (80 V), extended temperature range (-55 to 150°C), or alternative package provides design advantages and package footprint changes are accommodated.