CQ220-6DS Equivalent & Substitute Parts

Part Overview

The CQ220-6DS is an internally triggered TRIAC rated for 400 V off-state voltage and 6 A on-state current in a TO-220-3 through-hole package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across voltage, current, and gate trigger specifications while accommodating the through-hole TO-220 mounting standard.

Substiute Parts

CQ220-6DS

Central Semiconductor CorpIn Stock: 1072CQ220-6DS Datasheet

Current PartRFQ

MAC8SDG

onsemiIn Stock: 2156MAC8SDG Datasheet

MFR RecommendedRFQ

Q4006RH3TP

Littelfuse Inc.In Stock: 1131Q4006RH3TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CQ220-6DS is determined by the following criteria:

Mandatory Compatibility Parameters:

• Voltage - Off State: 400 V (exact match required)
• Mounting Type: Through Hole (physical compatibility)
• Package / Case: TO-220-3 or TO-220AB (pin-compatible variants)

Functional Compatibility Parameters:

• Current - On State (It (RMS)) (Max): Must equal or exceed 6 A
• Voltage - Gate Trigger (Vgt) (Max): Must not exceed 1.5 V
• Current - Gate Trigger (Igt) (Max): Must not exceed 5 mA
• Current - Hold (Ih) (Max): Must not exceed 10 mA

Both substitute parts meet these criteria. The MAC8SDG provides higher current capacity (8 A) with sensitive gate characteristics. The Q4006RH3TP maintains the 6 A current rating with Alternistor snubberless technology and improved temperature range (-40°C ~ 125°C).

Parameter Comparison

Engineering Selection Recommendations

MAC8SDG (onsemi): Active product status with 8 A current capacity exceeds the 6 A requirement of the CQ220-6DS. Sensitive gate configuration provides lower trigger requirements. Extended operating temperature range to 125°C supports broader thermal environments. Suitable for applications requiring higher current margin or sensitive gate triggering.

Q4006RH3TP (Littelfuse Inc.): Active product status with matched 6 A current rating maintains original design specifications. Alternistor snubberless technology reduces external component requirements. ROHS3 compliance and extended operating temperature range to 125°C meet modern regulatory standards. Improved gate trigger voltage (1.3 V maximum) provides enhanced sensitivity. Suitable for direct replacement in existing designs.

Both substitutes are active products with full availability, eliminating obsolescence risk associated with the CQ220-6DS.

Frequently Asked Questions (FAQ)

Q: Can MAC8SDG replace CQ220-6DS in all applications? A: MAC8SDG meets all mandatory electrical parameters for substitution. The 8 A current rating exceeds the 6 A requirement, providing additional design margin. Sensitive gate characteristics may alter circuit behavior in applications with specific gate drive requirements; circuit validation is necessary for gate-sensitive designs.

Q: What is the primary difference between MAC8SDG and Q4006RH3TP? A: MAC8SDG provides 8 A current capacity with logic-sensitive gate characteristics. Q4006RH3TP maintains the original 6 A rating with Alternistor snubberless technology. Q4006RH3TP offers ROHS3 compliance certification, while MAC8SDG does not specify RoHS status.

Q: Are TO-220-3 and TO-220AB packages physically compatible? A: TO-220AB is a pin-compatible variant of TO-220-3, suitable for through-hole PCB mounting. Both packages accommodate standard TO-220 footprints without modification.

Q: Which substitute is recommended for new designs? A: Selection depends on application requirements. For designs requiring higher current capacity or sensitive gate operation, MAC8SDG is appropriate. For designs requiring direct electrical equivalence with modern compliance certifications, Q4006RH3TP is appropriate.

Q: What is the operating temperature difference between CQ220-6DS and its substitutes? A: CQ220-6DS operates from -40°C to 110°C. Both MAC8SDG and Q4006RH3TP extend the upper limit to 125°C, providing 15°C additional thermal margin.