SS13-LTP Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS13-LTP is a 30V, 1A Schottky rectifier diode manufactured by Micro Commercial Co in DO-214AC (SMA) surface mount packaging. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary to maintain design continuity, support existing production lines, and ensure component availability for legacy systems and repair applications.

Substiute Parts

SS13-LTP

Micro Commercial CoIn Stock: 9979SS13-LTP Datasheet

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PMEG3010BEP,115

Nexperia USA Inc.In Stock: 1204PMEG3010BEP,115 Datasheet

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SS13

Fairchild SemiconductorIn Stock: 20077SS13 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SS13-LTP is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) (Max): 30 V
• Current - Average Rectified (Io): 1 A
• Technology: Schottky
• Mounting Type: Surface Mount
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• RoHS Status: ROHS3 Compliant

Secondary Compatibility Factors:

• Package / Case compatibility (DO-214AC or equivalent footprint)
• Operating Temperature range
• Forward voltage characteristics
• Reverse leakage current specifications

Substitute parts must meet or exceed the primary criteria while maintaining functional equivalence in the application circuit. Package differences are permissible only when physical board layout accommodates alternative surface mount packages with compatible footprints.

Parameter Comparison

Engineering Selection Recommendations

SS13 (Fairchild Semiconductor) - Direct Equivalent:

The Fairchild Semiconductor SS13 is the primary substitute for the SS13-LTP. Both components share identical electrical specifications (30V, 1A, 500 mV forward voltage) and the same DO-214AC (SMA) package footprint. The Fairchild part maintains active product status with established supply chain availability. Operating temperature range differs slightly (-65°C to 125°C versus -55°C to 150°C), which is acceptable for most applications within the -55°C to 125°C overlap region. This part is suitable for direct replacement without circuit modification.

PMEG3010BEP,115 (Nexperia USA Inc.) - Functional Equivalent with Package Variation:

The Nexperia PMEG3010BEP,115 meets all primary electrical substitution criteria with superior performance characteristics: lower forward voltage (450 mV versus 500 mV) and significantly lower reverse leakage current (50 µA versus 500 µA). However, this part uses SOD-128 packaging instead of DO-214AC (SMA), requiring PCB layout modification and footprint redesign. The Nexperia part is active and ROHS3 compliant. Selection of this substitute is appropriate only when board redesign is feasible and the improved electrical performance justifies the engineering effort.

Compliance and Availability:

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols. The Fairchild SS13 offers the highest availability (20,050 units in stock) and requires no design changes. The Nexperia part (1,127 units in stock) provides enhanced electrical performance for applications where forward voltage drop and leakage current are critical design parameters.

Frequently Asked Questions (FAQ)

Q: Can the PMEG3010BEP,115 be used as a direct drop-in replacement for the SS13-LTP?

A: No. While the PMEG3010BEP,115 meets all electrical specifications, it uses SOD-128 packaging instead of DO-214AC (SMA). Direct substitution requires PCB footprint modification and layout redesign. The Fairchild SS13 is the true drop-in replacement.

Q: What is the significance of the lower forward voltage in the Nexperia part?

A: The PMEG3010BEP,115 exhibits 450 mV forward voltage compared to 500 mV in the SS13-LTP. This 50 mV reduction decreases power dissipation and heat generation in the diode, which may improve circuit efficiency and thermal performance in power-sensitive applications.

Q: Are there temperature range limitations when substituting the Fairchild SS13?

A: The Fairchild SS13 operates from -65°C to 125°C, while the SS13-LTP operates from -55°C to 150°C. For applications requiring operation above 125°C or below -65°C, the Fairchild part is not suitable. Verify application temperature requirements before selection.

Q: Why is the reverse leakage current different across the three parts?

A: Reverse leakage current is a manufacturing and material characteristic that varies between manufacturers and process technologies. The SS13-LTP exhibits 500 µA, the Fairchild SS13 exhibits 200 µA, and the Nexperia part exhibits 50 µA at 30V. Lower leakage current reduces standby power consumption and improves circuit performance in low-power applications.

Q: Can the SS13-LTP be used in new designs?

A: No. The SS13-LTP is marked "Not For New Designs," indicating end-of-life status. New designs must use either the Fairchild SS13 or Nexperia PMEG3010BEP,115, both of which carry "Active" product status.

Q: What is the difference between DO-214AC and SOD-128 packages?

A: DO-214AC (SMA) and SOD-128 are both surface mount packages for small signal diodes but have different physical dimensions and PCB footprints. DO-214AC is larger and more common in legacy designs. SOD-128 is smaller and used in space-constrained applications. They are not mechanically interchangeable without PCB redesign.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The Fairchild SS13 and Nexperia PMEG3010BEP,115 are both ROHS3 compliant, matching the compliance status of the SS13-LTP. All parts are suitable for applications requiring RoHS certification.

Q: Which substitute part should be selected for maximum design compatibility?

A: The Fairchild Semiconductor SS13 provides maximum compatibility. It shares the identical DO-214AC (SMA) package, matching electrical specifications (30V, 1A, 500 mV forward voltage), and requires no circuit or PCB modifications. It is the recommended substitute for direct replacement applications.