STPS30SM80CT Equivalent & Substitute Parts

Part Overview

The STPS30SM80CT is a Schottky diode array manufactured by STMicroelectronics, configured as a 1 Pair Common Cathode arrangement with 80 V reverse voltage rating and 15 A average rectified current per diode. The device is packaged in a Through Hole TO-220-3 format and is classified as Obsolete. Due to its obsolete product status, identification of equivalent substitute components is necessary to maintain design continuity and ensure procurement availability for new production runs and field replacements.

Substiute Parts

STPS30SM80CT

STMicroelectronicsIn Stock: 1991STPS30SM80CT Datasheet

Current PartRFQ

DST3080C

Littelfuse Inc.In Stock: 703DST3080C Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the STPS30SM80CT is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Diode Configuration: 1 Pair Common Cathode (identical topology required)
• Technology: Schottky (same semiconductor technology)
• Voltage - DC Reverse (Vr) (Max): 80 V (minimum rating must equal or exceed)
• Current - Average Rectified (Io) (per Diode): 15 A (minimum rating must equal or exceed)
• Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io) (performance class match)

Mechanical Equivalence Criteria:

• Mounting Type: Through Hole (identical mounting method)
• Package / Case: TO-220-3 (identical physical form factor)

Compliance Equivalence Criteria:

• RoHS Status: ROHS3 Compliant (regulatory alignment)
• Moisture Sensitivity Level (MSL): 1 (Unlimited) (handling and storage compatibility)

Substitute parts must satisfy all electrical, mechanical, and compliance criteria to ensure direct functional replacement without circuit redesign or board layout modification.

Parameter Comparison

Engineering Selection Recommendations

The DST3080C manufactured by Littelfuse Inc. is a qualified substitute for the STPS30SM80CT. Both components meet the mandatory electrical and mechanical equivalence criteria: identical diode configuration (1 Pair Common Cathode), matching Schottky technology, equal reverse voltage rating (80 V), equal average rectified current (15 A per diode), identical fast recovery speed classification, and identical TO-220-3 Through Hole packaging.

Both parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring regulatory and handling compatibility. The DST3080C carries Active product status, providing long-term procurement availability and supply chain stability compared to the Obsolete STPS30SM80CT.

Parameter variations exist in forward voltage drop (820 mV versus 790 mV at 15 A) and reverse leakage current (700 µA versus 40 µA at 80 V). These differences fall within acceptable operational tolerances for Schottky diode array applications and do not preclude functional substitution in standard rectification circuits.

Frequently Asked Questions (FAQ)

Q: Can the DST3080C directly replace the STPS30SM80CT without circuit modification?

A: Yes. Both components share identical diode configuration, voltage rating, current rating, package type, and mounting method. Direct pin-compatible substitution is supported without circuit redesign.

Q: What is the significance of the forward voltage difference (790 mV vs. 820 mV)?

A: The 30 mV difference in forward voltage drop at 15 A represents a 3.8% variance. This variation is typical among Schottky diode manufacturers and does not affect circuit functionality in standard rectification applications. Thermal dissipation may increase marginally with the DST3080C due to higher forward voltage.

Q: Why does the DST3080C have higher reverse leakage current (700 µA vs. 40 µA)?

A: Reverse leakage current variation is a normal characteristic difference between manufacturers and production batches of Schottky diodes. The DST3080C leakage remains within acceptable limits for rectification applications and does not compromise circuit performance.

Q: Are both components available in the same packaging format?

A: Yes. Both the STPS30SM80CT and DST3080C are packaged in TO-220-3 Through Hole format, ensuring mechanical compatibility with existing PCB layouts and assembly processes.

Q: What is the procurement advantage of selecting the DST3080C?

A: The DST3080C carries Active product status with 652 units in stock, whereas the STPS30SM80CT is Obsolete. The DST3080C provides assured long-term availability and supply chain continuity for production and field service applications.

Q: Do both components meet the same regulatory compliance standards?

A: Yes. Both the STPS30SM80CT and DST3080C are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.