CQ92B Equivalent & Substitute Parts

Part Overview

The CQ92B 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 and specified electrical parameters define the substitution criteria for compatible alternatives.

Key Parameters

Parameter	CQ92B 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)	5 mA
Current - Hold (Ih) (Max)	5 mA
Operating Temperature Range	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-92-3

Substitute Part Grouping Explanation

Substitution of the CQ92B is determined by the following critical parameters:

Voltage Rating: Off-state voltage must be 200 V or greater to maintain electrical safety margins
Current Rating: On-state current (It (RMS)) must meet or exceed 1 A to handle circuit load requirements
Gate Trigger Characteristics: Voltage (Vgt) and current (Igt) specifications must be compatible with existing gate drive circuitry
Hold Current (Ih): Must not exceed circuit holding requirements
Operating Temperature: Must span the required thermal range
Mounting Type: Through-hole configuration required for PCB compatibility
Product Status: Active status preferred for long-term availability and supply chain reliability

The 2N6071BG meets these substitution criteria with enhanced current capacity (4 A vs. 1 A) and active product status, providing improved performance margins and production continuity.

Parameter Comparison

Parameter	CQ92B	2N6071BG	Compatibility
Voltage - Off State	200 V	200 V	Match
Current - On State (It (RMS)) (Max)	1 A	4 A	Compatible (higher rating)
Voltage - Gate Trigger (Vgt) (Max)	2 V	2.5 V	Compatible (within tolerance)
Current - Gate Trigger (Igt) (Max)	5 mA	3 mA	Compatible (lower requirement)
Current - Hold (Ih) (Max)	5 mA	15 mA	Compatible (higher rating)
Operating Temperature Range	-40°C ~ 125°C	-40°C ~ 110°C	Partial overlap (-40°C ~ 110°C)
Mounting Type	Through Hole	Through Hole	Match
Package / Case	TO-92-3	TO-225AA	Different package (physical layout consideration)
Product Status	Obsolete	Active	Substitute is active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Substitute meets current compliance

Engineering Selection Recommendations

The 2N6071BG is the qualified substitute for the obsolete CQ92B based on the following factors:

Electrical Compatibility: All critical voltage and current parameters are met or exceeded, ensuring functional equivalence in circuit operation
Product Status: Active status ensures availability for current and future production requirements
Compliance: ROHS3 compliance of the 2N6071BG aligns with modern manufacturing and environmental standards, whereas the CQ92B is non-compliant
Thermal Range: The 2N6071BG operates within -40°C to 110°C, which covers the majority of the CQ92B range; applications requiring operation above 110°C require thermal analysis
Package Consideration: The TO-225AA package differs from the TO-92-3; PCB layout and mechanical fit must be verified during implementation

Frequently Asked Questions (FAQ)

Q: Can the 2N6071BG directly replace the CQ92B without circuit modifications?

A: Electrical parameters are compatible. However, the different package (TO-225AA vs. TO-92-3) requires PCB layout verification. Gate drive circuitry compatibility should be confirmed based on the specific application.

Q: What is the significance of the higher current rating (4 A vs. 1 A) in the 2N6071BG?

A: The higher on-state current rating provides additional design margin and allows the substitute to handle higher load currents if required by future circuit revisions. This does not negatively impact applications designed for 1 A operation.

Q: Does the operating temperature difference affect substitution suitability?

A: The 2N6071BG operates to 110°C versus the CQ92B's 125°C maximum. Applications operating above 110°C require thermal analysis and alternative solutions. Most industrial applications operate within the 2N6071BG range.

Q: Why is RoHS compliance important for this substitution?

A: RoHS3 compliance of the 2N6071BG ensures compatibility with current manufacturing regulations and supply chain requirements. The non-compliant CQ92B may face sourcing restrictions in regulated markets.

Q: Are there any gate drive circuit considerations when substituting?

A: The 2N6071BG has a slightly higher gate trigger voltage (2.5 V vs. 2 V) and lower gate trigger current (3 mA vs. 5 mA). Existing gate drive circuits designed for the CQ92B are compatible; the lower Igt requirement may reduce gate drive power consumption.

Q: What packaging considerations apply to the TO-225AA package?

A: The TO-225AA package has a different physical footprint than TO-92-3. PCB hole spacing, lead diameter, and component height must be verified against the PCB design. Mechanical clearance around the component should be confirmed.

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