SS18E-TP Equivalent & Substitute Parts

Part Overview

The SS18E-TP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 80V DC reverse voltage and 1A average rectified current in a surface mount SMAE package. This component is classified as Obsolete, necessitating identification of equivalent alternatives for ongoing production and repair applications. Substitute parts must maintain electrical performance within the specified voltage, current, and thermal operating ranges while accommodating available packaging configurations.

Substiute Parts

SS18E-TP

Micro Commercial CoIn Stock: 656SS18E-TP Datasheet

Current PartRFQ

SS18-LTP

Micro Commercial CoIn Stock: 65164SS18-LTP Datasheet

Parametric EquivalentRFQ

SS18W_R1_00001

Panjit International Inc.In Stock: 2744SS18W_R1_00001 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SS18E-TP is determined by strict equivalence across the following electrical and mechanical parameters:

Mandatory Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): 80 V
• Current - Average Rectified (Io): 1 A
• Voltage - Forward (Vf) (Max) @ If: 850 mV @ 1 A
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Operating Temperature - Junction: -55°C to 150°C
• Technology: Schottky
• Mounting Type: Surface Mount
• Package / Case: DO-214AC, SMA

Acceptable Variation Parameters:

• Current - Reverse Leakage @ Vr: Variation permitted within component design tolerances
• Capacitance @ Vr, F: Variation permitted; specification not critical for rectification function
• Packaging Format: Tape & Reel (TR) acceptable as alternative to bulk packaging
• Manufacturer: Cross-manufacturer substitution permitted when electrical specifications align

The identified substitute parts SS18-LTP and SS18W_R1_00001 satisfy all mandatory equivalence criteria and are therefore classified as parametric equivalents.

Parameter Comparison

Engineering Selection Recommendations

SS18-LTP (Micro Commercial Co)

The SS18-LTP is a parametric equivalent manufactured by the same supplier as the main part. It maintains identical electrical specifications across voltage, current, and thermal parameters. Product status is classified as "Not For New Designs," indicating limited future availability. This part is suitable for legacy system maintenance and repair where component continuity with the original SS18E-TP is prioritized. Reverse leakage current is elevated to 50 µA compared to the main part's 10 µA specification, which remains within acceptable operating margins for rectification applications. Packaging is supplied in Tape & Reel format, standard for production environments.

SS18W_R1_00001 (Panjit International Inc.)

The SS18W_R1_00001 is a cross-manufacturer parametric equivalent manufactured by Panjit International Inc. It satisfies all mandatory electrical equivalence criteria and maintains identical voltage, current, and thermal ratings. Product status is Active, indicating current production and long-term availability. This part is the preferred selection for new production applications and long-term supply chain planning. Reverse leakage current is specified at 500 µA, which is elevated relative to the main part but remains within functional tolerance for rectification circuits. Capacitance specification is not provided; however, this parameter is not critical for rectifier diode selection in standard applications. All regulatory compliance certifications (ROHS3, REACH Unaffected) are equivalent to the main part.

Frequently Asked Questions (FAQ)

Q: Can SS18-LTP and SS18W_R1_00001 be used interchangeably with SS18E-TP?

A: Both substitute parts are parametric equivalents and satisfy all mandatory electrical specifications. They are functionally interchangeable in applications requiring 80V, 1A Schottky rectification with fast recovery characteristics. Physical package dimensions (DO-214AC, SMA) are identical, permitting direct board-level substitution.

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

A: Reverse leakage current varies across the three parts: SS18E-TP (10 µA), SS18-LTP (50 µA), and SS18W_R1_00001 (500 µA). These variations reflect manufacturing tolerances and process differences between suppliers. All values remain within acceptable operating ranges for rectification applications. Selection should be based on specific circuit leakage requirements; applications with stringent leakage specifications should prioritize the SS18E-TP or SS18-LTP.

Q: Are there packaging differences between the substitute parts?

A: The SS18E-TP is supplied in bulk packaging (SMAE designation). The SS18-LTP and SS18W_R1_00001 are supplied in Tape & Reel (TR) format. Both packaging formats contain identical components; the difference is in delivery and handling configuration. Tape & Reel format is standard for automated assembly processes.

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

A: The SS18W_R1_00001 is classified as Active product status and is the recommended selection for new designs. It ensures long-term supply chain continuity and eliminates obsolescence risk. The SS18-LTP is classified as "Not For New Designs" and should be reserved for legacy system maintenance.

Q: Are all three parts RoHS and REACH compliant?

A: All three parts are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.

Q: What is the operating temperature range for these diodes?

A: All three parts operate across an identical junction temperature range of -55°C to 150°C, suitable for industrial and commercial applications across extended environmental conditions.

Q: Is capacitance specification critical for selecting a substitute?

A: Capacitance variation (30 pF to 35 pF, or unspecified) is not a limiting factor for rectifier diode substitution in standard applications. Capacitance becomes relevant only in high-frequency switching circuits where junction capacitance affects performance. For standard rectification applications, capacitance differences are negligible.