SK35B-TP Schottky Diode Equivalent & Substitute Parts

Part Overview

The SK35B-TP is a surface mount Schottky diode manufactured by Micro Commercial Co, rated for 50V DC reverse voltage and 3A average rectified current in a DO-214AA (SMB) package. This component is classified as Obsolete, necessitating identification of equivalent alternatives for ongoing production and design requirements. Substitute parts must maintain electrical performance across voltage, current, and thermal specifications while meeting RoHS3 and REACH compliance standards.

Substiute Parts

SK35B-TP

Micro Commercial CoIn Stock: 1101SK35B-TP Datasheet

Current PartRFQ

SK35B-LTP

Micro Commercial CoIn Stock: 6680SK35B-LTP Datasheet

DirectRFQ

B350B-13-F

Diodes IncorporatedIn Stock: 10449B350B-13-F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SK35B-TP is determined by strict equivalence across the following electrical and mechanical parameters:

• Reverse Voltage Rating: 50V DC maximum
• Forward Current Capacity: 3A average rectified current
• Forward Voltage Drop: Maximum 750mV at 3A (allows tolerance variation)
• Recovery Speed: Fast recovery characteristic ≤ 500ns for currents > 200mA
• Reverse Leakage Current: 500µA maximum at 50V
• Package Configuration: DO-214AA (SMB) surface mount form factor
• Compliance: RoHS3 and REACH standards

Substitute parts must satisfy all electrical parameters within the specified tolerances and maintain the same physical package for PCB compatibility. Operating temperature range may extend beyond the original specification without affecting substitution validity.

Parameter Comparison

Engineering Selection Recommendations

SK35B-LTP (Micro Commercial Co): Direct manufacturer equivalent with identical electrical specifications. Extended operating temperature range (-55°C to 150°C) provides thermal margin beyond the original SK35B-TP. Product status "Not For New Designs" indicates limited future availability. Suitable for legacy system maintenance and existing production runs where manufacturer continuity is preferred.

B350B-13-F (Diodes Incorporated): Functionally equivalent alternative from an active product line. Forward voltage specification of 700mV at 3A is superior to the 750mV maximum of SK35B-TP, indicating lower power dissipation. Extended operating temperature range (-55°C to 150°C) and unlimited moisture sensitivity level (MSL 1) support long-term reliability. Active product status ensures sustained availability and supply chain stability. Recommended for new designs and production transitions.

Both substitute parts maintain full compliance with RoHS3 and REACH requirements. Selection between SK35B-LTP and B350B-13-F depends on supply chain strategy: SK35B-LTP for manufacturer consistency, B350B-13-F for long-term availability and improved electrical performance.

Frequently Asked Questions (FAQ)

Q: Can SK35B-LTP directly replace SK35B-TP in existing designs?

A: Yes. SK35B-LTP is a direct manufacturer equivalent with identical electrical specifications (50V, 3A, 750mV forward voltage, fast recovery ≤ 500ns). The extended operating temperature range (-55°C to 150°C versus -55°C to 125°C) provides additional thermal margin. Both use the same DO-214AA (SMB) package for PCB compatibility.

Q: What is the primary advantage of B350B-13-F over SK35B-TP?

A: B350B-13-F offers superior forward voltage performance at 700mV maximum versus 750mV, resulting in lower power dissipation and heat generation. It maintains all other electrical parameters (50V reverse voltage, 3A current, fast recovery) and extends the operating temperature range to 150°C. Active product status ensures long-term supply availability.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the DO-214AA (SMB) surface mount package with identical pinout and footprint. Direct PCB substitution is possible without layout modifications.

Q: Do substitute parts meet the same compliance standards?

A: Yes. SK35B-LTP and B350B-13-F are both RoHS3 compliant and REACH unaffected, matching the original SK35B-TP compliance profile.

Q: Why is SK35B-TP classified as Obsolete?

A: Obsolete status indicates the part is no longer manufactured by Micro Commercial Co. SK35B-LTP and B350B-13-F provide equivalent functionality for ongoing applications.

Q: What is the difference between "Obsolete" and "Not For New Designs" product status?

A: Obsolete parts are no longer produced and existing inventory is finite. "Not For New Designs" indicates limited production continues for legacy support but new designs should use alternatives. B350B-13-F, classified as Active, is produced in full volume for current and future applications.

Q: Can forward voltage differences affect circuit performance?

A: Forward voltage differences of 50mV (750mV versus 700mV at 3A) may affect voltage regulation in precision applications. B350B-13-F's lower forward voltage reduces power dissipation and heat generation, beneficial for thermal-constrained designs. Verify circuit tolerance specifications before selection.

Q: Is moisture sensitivity a concern for these parts?

A: SK35B-LTP and B350B-13-F both specify MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard PCB assembly and storage practices apply.