CS220-25P Equivalent & Substitute Parts

Part Overview

The CS220-25P is a 1 kV, 25 A standard recovery SCR (silicon-controlled rectifier) in TO-220-3 through-hole packaging manufactured by Central Semiconductor Corp. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The CS220-25P serves applications requiring thyristor switching and control in power electronics circuits operating at 1 kV voltage levels with moderate current requirements.

Substiute Parts

CS220-25P

Central Semiconductor CorpIn Stock: 951CS220-25P Datasheet

Current PartRFQ

SK040RTP

LittelfuseIn Stock: 2414SK040RTP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SK040RTP from Littelfuse qualifies as a direct substitute for the CS220-25P based on the following critical parameters:

• Voltage - Off State: Both parts rated at 1 kV
• Voltage - Gate Trigger (Vgt) (Max): Both at 1.5 V maximum
• Voltage - On State (Vtm) (Max): Both at 1.8 V maximum
• SCR Type: Both are standard recovery thyristors
• Operating Temperature Range: Both operate from -40°C to 125°C
• Mounting Type: Both are through-hole mounted
• Package / Case: Both use TO-220-3 footprint

The SK040RTP provides enhanced current handling capability (40 A RMS vs. 25 A RMS) while maintaining full compatibility with the electrical and thermal specifications of the original part. The higher current rating ensures the substitute can handle all applications designed for the CS220-25P without derating.

Parameter Comparison

Engineering Selection Recommendations

The SK040RTP is the qualified substitute for the CS220-25P. Selection is based on:

• Product Status: The SK040RTP is active and in production, ensuring long-term availability and supply chain continuity. The CS220-25P is obsolete and subject to discontinuation.
• Compliance: The SK040RTP is ROHS3 compliant, meeting current environmental and regulatory standards. Both parts are REACH unaffected and classified as EAR99 for export control purposes.
• Electrical Compatibility: All critical switching parameters (gate trigger voltage, on-state voltage, and operating temperature range) are identical between the two parts. The SK040RTP's higher current rating (40 A vs. 25 A) provides design margin without requiring circuit modifications.
• Mechanical Compatibility: Both parts use identical TO-220-3 through-hole packaging, enabling direct PCB footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can the SK040RTP be used as a direct replacement for the CS220-25P without PCB modifications?

A: Yes. Both parts share identical TO-220-3 through-hole packaging and pinout. No PCB layout changes are required for mechanical or electrical integration.

Q: What are the key electrical differences between these parts?

A: The SK040RTP has a higher maximum RMS current rating (40 A vs. 25 A) and slightly higher gate trigger current (40 mA vs. 30 mA). All voltage parameters and operating temperature ranges are identical. The higher current rating of the SK040RTP makes it suitable for all applications designed for the CS220-25P.

Q: Why is the SK040RTP recommended over the CS220-25P?

A: The CS220-25P is obsolete, creating procurement and supply chain risk. The SK040RTP is an active product from a major manufacturer (Littelfuse), ensuring availability and long-term support. It meets current compliance standards (ROHS3) and provides equivalent or superior electrical performance.

Q: Are there any thermal or reliability concerns when substituting the SK040RTP for the CS220-25P?

A: No. Both parts operate across the same temperature range (-40°C to 125°C) and are standard recovery SCRs. The SK040RTP's higher current capability actually reduces thermal stress in applications operating near the CS220-25P's 25 A limit.

Q: What packaging options are available for the SK040RTP?

A: The SK040RTP is supplied in tube packaging. The TO-220-3 case style is standard for both parts, ensuring compatibility with existing PCB designs and assembly processes.