K2000S Equivalent & Substitute Parts Reference

Part Overview

The K2000S is a SIDAC thyristor manufactured by Littelfuse Inc., rated for 190–215V breakover voltage with 1A peak output current in a DO-214AA/SMB package. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The K2000S serves as a voltage-triggered switching device suitable for overvoltage protection and transient suppression applications requiring precise breakover characteristics.

Substiute Parts

K2000S

Littelfuse Inc.In Stock: 1116K2000S Datasheet

Current PartRFQ

K2000SRP

Littelfuse Inc.In Stock: 17967K2000SRP Datasheet

DirectRFQ

SMTPA180

STMicroelectronicsIn Stock: 3882SMTPA180 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the K2000S is determined by the following critical parameters:

• Voltage - Breakover: Must fall within or closely match the 190–215V range to maintain circuit protection thresholds
• Current - Hold (Ih): Must support the 150 mA maximum hold current requirement
• Package / Case: Must be DO-214AA/SMB for mechanical and thermal compatibility
• Operating Temperature Range: Must support –40°C to 125°C operation
• RoHS Compliance: Must maintain ROHS3 compliance for regulatory alignment

Two substitute parts are identified:

1. K2000SRP (Littelfuse Inc.): Direct equivalent with identical electrical specifications, differing only in packaging format (Tape & Reel vs. bulk). Active product status ensures continued availability.

2. SMTPA180 (STMicroelectronics): Cross-category substitute from the TVS thyristor family with compatible breakover voltage (240V off-state, 180V nominal) and matching hold current (150 mA). Operates within the same temperature range and package footprint.

Parameter Comparison

Engineering Selection Recommendations

K2000SRP is the primary substitute for K2000S applications. Both parts are manufactured by Littelfuse Inc. with identical electrical specifications and package geometry. The K2000SRP maintains active product status, ensuring long-term availability and supply chain continuity. The only functional difference is packaging format (Tape & Reel for K2000SRP vs. bulk for K2000S), which does not affect electrical performance or circuit compatibility.

SMTPA180 serves as a secondary cross-category substitute when K2000SRP availability is constrained. As an STMicroelectronics TVS thyristor, it provides higher peak pulse current capability (150A vs. 1A) and operates within compatible voltage and hold current parameters. The SMTPA180 is suitable for applications requiring enhanced transient suppression performance while maintaining the same package footprint and thermal operating range. Both substitute parts carry ROHS3 compliance and REACH unaffected status, meeting modern regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can K2000SRP be used as a direct replacement for K2000S?

A: Yes. K2000SRP is a direct electrical equivalent with identical breakover voltage (190–215V), hold current (150 mA), and peak output current (1A). Both use the DO-214AA/SMB package. The difference is packaging format only; K2000SRP is supplied in Tape & Reel format for automated assembly, while K2000S was supplied in bulk. No circuit modifications are required.

Q: What are the key differences between K2000S and SMTPA180?

A: Both parts share the same DO-214AA/SMB package, 150 mA hold current, and ROHS3 compliance. The primary differences are: (1) SMTPA180 is a TVS thyristor with higher peak pulse current (150A vs. 1A), making it suitable for higher-energy transient events; (2) SMTPA180 has a 240V off-state voltage specification compared to K2000S's 190–215V breakover range. SMTPA180 is appropriate for applications requiring enhanced surge protection capability.

Q: Are there any thermal or temperature considerations when substituting these parts?

A: K2000S and K2000SRP both operate across –40°C to 125°C (TJ). Operating temperature data for SMTPA180 is not provided in the available specifications. Verify SMTPA180 thermal performance against your application's temperature requirements before selection.

Q: Do all three parts meet current compliance standards?

A: Yes. K2000S, K2000SRP, and SMTPA180 are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: Which substitute should I select for new designs?

A: Use K2000SRP for direct replacement in existing K2000S applications. For new designs requiring enhanced transient suppression, evaluate SMTPA180 based on your circuit's peak pulse current and voltage requirements. Both parts are active products with confirmed inventory availability.