CS220-12P Equivalent & Substitute Parts

Part Overview

The CS220-12P is a 1 kV, 12 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 identification of suitable substitute parts essential for ongoing system support and new design implementations. The part's primary function is AC power control and switching applications requiring thyristor-based gate-triggered switching at 1 kV voltage levels.

Substiute Parts

CS220-12P

Central Semiconductor CorpIn Stock: 1182CS220-12P Datasheet

Current PartRFQ

SK010RTP

Littelfuse Inc.In Stock: 846SK010RTP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS220-12P is determined by strict equivalence across the following critical parameters:

• Voltage Rating (Off State): Must be 1 kV minimum
• SCR Type: Must be Standard Recovery
• Gate Trigger Characteristics: Vgt (Max) 1.5 V and Igt (Max) 15 mA
• On-State Voltage (Vtm): Must not exceed 1.6 V
• Mounting and Package: Through-hole TO-220-3 configuration
• Operating Temperature: -40°C to 125°C range
• Hold Current (Ih): Must not exceed 30 mA

The SK010RTP from Littelfuse Inc. meets all substitution criteria. While the on-state RMS current rating is reduced from 12 A to 10 A, all gate-trigger parameters, voltage ratings, and thermal characteristics remain within specification. The part is actively manufactured and RoHS3 compliant, providing long-term availability and regulatory compliance advantages over the obsolete CS220-12P.

Parameter Comparison

Engineering Selection Recommendations

The SK010RTP is the qualified substitute for CS220-12P applications. Selection is based on the following factors:

Product Status: The CS220-12P is obsolete, creating supply chain risk. The SK010RTP is actively manufactured by Littelfuse Inc., ensuring long-term availability and support.

Regulatory Compliance: The SK010RTP carries RoHS3 compliance certification, meeting current environmental and regulatory requirements. Both parts maintain REACH Unaffected status and EAR99 export classification.

Electrical Equivalence: Gate-trigger parameters (Vgt and Igt) are identical. On-state voltage (Vtm) matches exactly at 1.6 V maximum. The voltage rating and SCR type are equivalent.

Current Rating Consideration: The SK010RTP RMS current rating is 10 A versus 12 A for the CS220-12P. Applications requiring the full 12 A capacity must evaluate whether 10 A operation is acceptable for the specific load profile. The 83 A and 100 A non-repetitive surge ratings of the SK010RTP provide equivalent transient protection.

Thermal and Mechanical Compatibility: Operating temperature range, through-hole mounting, and TO-220-3 package are identical, ensuring direct board-level replacement without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can SK010RTP directly replace CS220-12P in all applications?

A: Direct replacement is possible for applications where the 10 A RMS current rating is sufficient. If the original design requires the full 12 A capacity, current-carrying capability must be re-evaluated. All other electrical and mechanical parameters are equivalent.

Q: What is the significance of the reduced RMS current rating?

A: The SK010RTP is rated for 10 A RMS versus 12 A RMS on the CS220-12P. This represents a 16.7% reduction in continuous current capacity. Applications operating near the 12 A limit require thermal and load analysis to confirm 10 A operation is acceptable.

Q: Are the gate-trigger parameters identical?

A: Yes. Both parts specify Vgt (Max) of 1.5 V and Igt (Max) of 15 mA. Gate drive circuits designed for CS220-12P will function identically with SK010RTP.

Q: What packaging differences exist between these parts?

A: Both use TO-220-3 through-hole packaging. The SK010RTP supplier device package is designated TO-220AB-R, indicating a specific lead configuration variant. Physical footprint and mounting are compatible.

Q: Why is RoHS3 compliance important for the substitute?

A: RoHS3 compliance ensures the SK010RTP meets current environmental regulations for electronic components. This is particularly important for new designs and systems subject to regulatory requirements in EU and other jurisdictions.

Q: Can the hold current difference (20 mA vs 30 mA) affect circuit operation?

A: The SK010RTP hold current maximum of 30 mA is higher than the CS220-12P at 20 mA. This means slightly more gate current is required to maintain conduction. Gate drive circuits must supply sufficient current to exceed the 30 mA hold threshold. This is not a compatibility issue but requires confirmation that gate drive capability is adequate.