VCK105-12IO7 Equivalent & Substitute Parts

Part Overview

The VCK105-12IO7 is a thyristor module manufactured by IXYS, rated for 1200V off-state voltage with 105A average on-state current and 180A RMS on-state current. This component is a Common Cathode SCR module with two SCRs in ECO-PAC2 packaging, designed for chassis mount applications. The product is currently obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new designs requiring compatible performance characteristics.

Key Parameters

Parameter	Value
Voltage - Off State	1.2 kV
Current - On State (It (AV)) (Max)	105 A
Current - On State (It (RMS)) (Max)	180 A
Voltage - Gate Trigger (Vgt) (Max)	1.5 V
Current - Gate Trigger (Igt) (Max)	150 mA
Current - Non Rep. Surge 50, 60Hz (Itsm)	2250A, 2400A
Current - Hold (Ih) (Max)	200 mA
Operating Temperature Range	-40°C ~ 125°C (TJ)
Structure	Common Cathode - All SCRs
Number of SCRs	2
Mounting Type	Chassis Mount

Substitute Part Grouping Explanation

Substitution of the VCK105-12IO7 is determined by the following critical electrical and mechanical parameters:

Voltage Rating: Off-state voltage must be 1.2 kV to maintain system voltage compatibility
Current Ratings: Average on-state current (It (AV)) of 105A and RMS on-state current (It (RMS)) must be met or exceeded
Gate Trigger Characteristics: Vgt and Igt parameters must be compatible with existing gate drive circuits
Hold Current: Must not exceed circuit requirements
Structure: Common Cathode configuration with 2 SCRs is mandatory for pin compatibility
Mounting: Chassis mount requirement must be maintained
Operating Temperature: Range must support the application environment

The VS-VSKU105/12 from Vishay General Semiconductor - Diodes Division qualifies as a substitute based on matching these core parameters while maintaining functional equivalence.

Parameter Comparison

Parameter	VCK105-12IO7 (IXYS)	VS-VSKU105/12 (Vishay)
Voltage - Off State	1.2 kV	1.2 kV
Current - On State (It (AV)) (Max)	105 A	105 A
Current - On State (It (RMS)) (Max)	180 A	165 A
Voltage - Gate Trigger (Vgt) (Max)	1.5 V	2.5 V
Current - Gate Trigger (Igt) (Max)	150 mA	150 mA
Current - Non Rep. Surge 50, 60Hz (Itsm)	2250A, 2400A	2000A, 2094A
Current - Hold (Ih) (Max)	200 mA	250 mA
Operating Temperature Range	-40°C ~ 125°C (TJ)	-40°C ~ 130°C (TJ)
Structure	Common Cathode - All SCRs	Common Cathode - All SCRs
Number of SCRs	2	2
Mounting Type	Chassis Mount	Chassis Mount
Package / Case	ECO-PAC2	ADD-A-PAK (3 + 4)
Product Status	Obsolete	Active
RoHS Status	Not specified	ROHS3 Compliant

Engineering Selection Recommendations

The VS-VSKU105/12 is an active product with ROHS3 compliance, providing a viable path forward from the obsolete VCK105-12IO7. Both components share identical core electrical specifications for voltage rating and average on-state current. The substitute maintains the required Common Cathode structure with two SCRs and chassis mount configuration.

Differences in RMS current rating (165A vs 180A), gate trigger voltage (2.5V vs 1.5V), surge current capability, and hold current must be evaluated against specific application requirements. The extended operating temperature range of the substitute (-40°C to 130°C) provides additional thermal margin. Package differences (ADD-A-PAK vs ECO-PAC2) require mechanical verification for board layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can VS-VSKU105/12 directly replace VCK105-12IO7 in all applications?

A: Direct replacement requires verification of three factors: gate drive circuit compatibility with the higher Vgt maximum (2.5V vs 1.5V), mechanical fit within the chassis mount footprint (ADD-A-PAK vs ECO-PAC2 packaging), and confirmation that the 165A RMS rating meets application requirements where the original 180A RMS was specified.

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

A: The primary differences are RMS current rating (165A vs 180A), gate trigger voltage maximum (2.5V vs 1.5V), non-repetitive surge current (2000A/2094A vs 2250A/2400A), and hold current maximum (250mA vs 200mA). Average on-state current, off-state voltage, and gate trigger current remain identical.

Q: Does the package difference affect substitution?

A: Yes. The VCK105-12IO7 uses ECO-PAC2 packaging while the VS-VSKU105/12 uses ADD-A-PAK (3 + 4). Physical dimensions, pin spacing, and mounting hole locations differ. Board layout and mechanical mounting must be verified before substitution.

Q: Is the VS-VSKU105/12 suitable for new designs?

A: The VS-VSKU105/12 is an active product with ROHS3 compliance, making it suitable for new designs. The extended operating temperature range (-40°C to 130°C) and active product status provide long-term availability and supply chain stability compared to the obsolete VCK105-12IO7.

Q: What compliance certifications apply to these parts?

A: Both components are REACH Unaffected and classified as EAR99 for export control purposes. The VS-VSKU105/12 additionally carries ROHS3 compliance. Both have Moisture Sensitivity Level 1 (Unlimited).

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