CQ92BT Equivalent & Substitute Parts

Part Overview

The CQ92BT is an internally triggered TRIAC rated for 200 V off-state voltage and 1 A on-state current in a TO-92-3 through-hole package. This component is classified as obsolete, making equivalent substitutes necessary for new designs and production continuity. The internally triggered configuration provides gate control with specified trigger voltage and current parameters suitable for low-power AC switching applications.

Key Parameters

Parameter	Value
Voltage - Off State	200 V
Current - On State (It (RMS)) (Max)	1 A
Voltage - Gate Trigger (Vgt) (Max)	2 V
Current - Gate Trigger (Igt) (Max)	3 mA
Current - Hold (Ih) (Max)	3 mA
Operating Temperature Range	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-92-3
Configuration	Single

Substitute Part Grouping Explanation

Substitution of the CQ92BT is determined by the following critical parameters:

Voltage Rating: Off-state voltage must be 200 V or higher to maintain circuit protection margins
Current Rating: On-state current capacity must meet or exceed 1 A RMS
Gate Trigger Parameters: Voltage gate trigger (Vgt) and current gate trigger (Igt) must be compatible with existing gate drive circuitry
Hold Current: Must not exceed application requirements to prevent unintended latching
Mounting Type: Through-hole configuration required for PCB compatibility
Temperature Range: Operating temperature must encompass the application environment

The 2N6071BG qualifies as a substitute based on these parameters, with enhanced current capacity and active product status.

Parameter Comparison

Parameter	CQ92BT	2N6071BG
Manufacturer	Central Semiconductor Corp	Littelfuse Inc.
Voltage - Off State	200 V	200 V
Current - On State (It (RMS)) (Max)	1 A	4 A
Voltage - Gate Trigger (Vgt) (Max)	2 V	2.5 V
Current - Gate Trigger (Igt) (Max)	3 mA	3 mA
Current - Hold (Ih) (Max)	3 mA	15 mA
Operating Temperature Range	-40°C ~ 125°C	-40°C ~ 110°C
Mounting Type	Through Hole	Through Hole
Package / Case	TO-92-3	TO-225AA
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

The 2N6071BG is the qualified substitute for the CQ92BT based on the following factors:

Voltage Compatibility: Both devices maintain 200 V off-state voltage rating, ensuring equivalent circuit protection
Current Capacity: The 2N6071BG provides 4 A on-state current, exceeding the 1 A requirement of the CQ92BT, offering design margin
Gate Trigger Parameters: Gate trigger voltage (2.5 V max) and current (3 mA max) remain within compatible ranges for existing gate drive circuits
Product Status: The 2N6071BG is active and in production, ensuring long-term availability and supply chain continuity
Regulatory Compliance: The 2N6071BG is ROHS3 compliant, meeting current environmental standards, whereas the CQ92BT is non-compliant
Package Consideration: The 2N6071BG uses TO-225AA packaging instead of TO-92-3, requiring PCB layout modification

The higher hold current (15 mA vs. 3 mA) of the 2N6071BG must be evaluated in applications with sensitive gate control requirements.

Frequently Asked Questions (FAQ)

Q: Can the 2N6071BG directly replace the CQ92BT without circuit modification?

A: The 2N6071BG is electrically compatible at the 200 V voltage rating and 1 A current level. However, the different package (TO-225AA vs. TO-92-3) requires PCB layout changes. The higher hold current (15 mA) may affect gate control sensitivity in specific applications.

Q: What is the significance of the gate trigger voltage difference (2 V vs. 2.5 V)?

A: The 0.5 V difference in maximum gate trigger voltage is within typical gate drive circuit tolerances. Existing gate drive circuits designed for the CQ92BT will operate the 2N6071BG within specification.

Q: Why is the operating temperature range different between the two parts?

A: The CQ92BT operates to 125°C while the 2N6071BG operates to 110°C. Applications requiring operation above 110°C must retain the CQ92BT or identify alternative solutions. Most commercial and industrial applications operate within the 2N6071BG temperature range.

Q: Does the higher current rating of the 2N6071BG affect circuit performance?

A: The 4 A rating of the 2N6071BG provides design margin for the 1 A application. This does not negatively affect performance; it allows for future design flexibility and thermal margin.

Q: What is the impact of RoHS compliance on part selection?

A: The 2N6071BG is ROHS3 compliant, meeting current environmental regulations. The CQ92BT is non-compliant. New designs and production must use ROHS3 compliant components; the 2N6071BG satisfies this requirement.

Q: Are there any other substitutes available for the CQ92BT?

A: Based on the provided data, the 2N6071BG is the qualified substitute. Additional alternatives may exist but are not included in this reference.

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