SK32B-TP Schottky Diode Equivalent & Substitute Parts

Part Overview

The SK32B-TP is a 20V, 3A Schottky rectifier diode manufactured by Micro Commercial Co in a DO-214AA (SMB) surface mount package. This component is classified as obsolete, necessitating identification of equivalent alternatives for ongoing production and design requirements. Schottky diodes in this voltage and current class are widely used in power supply circuits, voltage regulation, and reverse polarity protection applications where fast switching and low forward voltage drop are critical performance factors.

Substiute Parts

SK32B-TP

Micro Commercial CoIn Stock: 3733SK32B-TP Datasheet

Current PartRFQ

SK32B-LTP

Micro Commercial CoIn Stock: 6872SK32B-LTP Datasheet

DirectRFQ

B320B-13-F

Diodes IncorporatedIn Stock: 344406B320B-13-F Datasheet

SimilarRFQ

SS32

MDDIn Stock: 19676SS32 Datasheet

SimilarRFQ

SK32B/TR13

Microsemi CorporationIn Stock: 919SK32B/TR13 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SK32B-TP is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) Maximum: 20V
• Current - Average Rectified (Io): 3A
• Voltage - Forward (Vf) Maximum @ If: 500 mV @ 3 A
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 500 µA @ 20 V
• Mounting Type: Surface Mount
• Technology: Schottky

Package Considerations: Substitutes are grouped by package type. The primary package is DO-214AA (SMB). The SS32 variant uses DO-214AC (SMA) package, which represents a different footprint and is suitable only where mechanical constraints permit package variation.

Compliance Baseline: All listed substitutes maintain ROHS3 compliance and REACH unaffected status, matching the original part's regulatory standing.

Parameter Comparison

Engineering Selection Recommendations

For New Designs and Production:

The B320B-13-F (Diodes Incorporated) is the primary recommended substitute. This part maintains full electrical and thermal equivalence to the SK32B-TP across all critical parameters, operates at an extended junction temperature range (-55°C to 150°C), carries Active product status, and holds AEC-Q101 automotive qualification. The B320B-13-F is available in high volume (344,300 pcs in stock) and maintains ROHS3 compliance.

For Existing Designs Requiring Pin-Compatible Replacement:

The SK32B-LTP (Micro Commercial Co) provides direct mechanical and electrical compatibility with identical DO-214AA (SMB) packaging and matching electrical specifications. However, this part is classified as Not For New Designs and should be used only for legacy system maintenance or production continuation where design revision is not feasible.

For Applications Permitting Package Variation:

The SS32 (MDD) offers electrical equivalence with a different surface mount package (DO-214AC, SMA). This substitute is suitable only where PCB layout and mechanical constraints allow package substitution. The SS32 maintains Active product status and full compliance requirements.

Not Recommended for New Designs:

The SK32B/TR13 (Microsemi Corporation) meets all electrical and thermal specifications but carries RoHS non-compliant status, making it unsuitable for applications subject to RoHS3 regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the B320B-13-F directly replace the SK32B-TP without circuit modification?

A: Yes. The B320B-13-F maintains electrical equivalence across all critical parameters: 20V reverse voltage rating, 3A average rectified current, 500 mV forward voltage drop at 3A, and identical fast recovery switching characteristics. Both components use the DO-214AA (SMB) package with identical pinout and footprint. No circuit modification is required.

Q: What is the difference between SK32B-TP and SK32B-LTP?

A: Both parts are manufactured by Micro Commercial Co and share identical electrical specifications and DO-214AA packaging. The primary difference is product status: SK32B-TP is Obsolete, while SK32B-LTP is Not For New Designs. The SK32B-LTP offers an extended operating temperature range (-55°C to 150°C versus -55°C to 125°C). For new production, neither part is recommended; the B320B-13-F is the preferred alternative.

Q: Why is the SS32 listed as a substitute if it uses a different package?

A: The SS32 provides electrical equivalence in all critical performance parameters but uses the DO-214AC (SMA) package instead of DO-214AA (SMB). This represents a different physical footprint and is suitable only for applications where PCB layout permits package substitution. Mechanical compatibility must be verified before selection.

Q: Is the SK32B/TR13 suitable for RoHS3-regulated applications?

A: No. The SK32B/TR13 is RoHS non-compliant and cannot be used in applications subject to RoHS3 regulatory requirements. The B320B-13-F, SK32B-LTP, and SS32 all maintain ROHS3 compliance and are appropriate for regulated environments.

Q: What is the significance of the AEC-Q101 qualification on the B320B-13-F?

A: AEC-Q101 qualification indicates that the B320B-13-F has undergone automotive-grade reliability testing and is approved for use in automotive applications. This certification provides additional assurance of component quality and long-term reliability beyond standard commercial specifications.

Q: Can I use these substitutes interchangeably in high-temperature applications?

A: The B320B-13-F and SK32B-LTP support extended junction temperature operation to 150°C, compared to 125°C for the SK32B-TP, SS32, and SK32B/TR13. For applications operating near or above 125°C, the B320B-13-F or SK32B-LTP are preferred to ensure adequate thermal margin.

Q: What packaging format should I specify when ordering the B320B-13-F?

A: The B320B-13-F is supplied in Tape & Reel (TR) format. Verify that your assembly process accommodates reel-based component feeding. Alternative packaging formats may be available through the manufacturer or authorized distributors.