Q2006RH4 Equivalent & Substitute Parts

Part Overview

The Q2006RH4 is a snubberless TRIAC Alternistor manufactured by Littelfuse Inc., rated for 200 V off-state voltage and 6 A on-state current in a TO-220 through-hole package. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. The part operates across an industrial temperature range of -40°C to 125°C and is ROHS3 compliant.

Key Parameters

Parameter	Value
Voltage - Off State	200 V
Current - On State (It (RMS)) (Max)	6 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V
Current - Gate Trigger (Igt) (Max)	35 mA
Current - Hold (Ih) (Max)	35 mA
Operating Temperature Range	-40°C to 125°C (TJ)
Package / Case	TO-220-3
Mounting Type	Through Hole
Triac Type	Alternistor - Snubberless
Configuration	Single

Substitute Part Grouping Explanation

Substitution of the Q2006RH4 is determined by the following critical parameters:

Triac Type: Must be Alternistor - Snubberless configuration
Current Rating: On-state current must be 6 A (It (RMS)) or higher
Gate Trigger Characteristics: Voltage (Vgt) and current (Igt) must match or be lower to ensure reliable triggering
Hold Current (Ih): Must match specified maximum of 35 mA
Package: TO-220-3 through-hole mounting required for mechanical compatibility
Operating Temperature: Must support -40°C to 125°C range
Compliance: ROHS3 compliance required

The BTB06-600CWRG from STMicroelectronics meets these substitution criteria. While its off-state voltage rating is higher (600 V versus 200 V), this represents an uprated specification that does not compromise functionality in 200 V applications. All other electrical and mechanical parameters align with or exceed the Q2006RH4 requirements.

Parameter Comparison

Parameter	Q2006RH4 (Littelfuse)	BTB06-600CWRG (STMicroelectronics)
Voltage - Off State	200 V	600 V
Current - On State (It (RMS)) (Max)	6 A	6 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V	1.3 V
Current - Gate Trigger (Igt) (Max)	35 mA	35 mA
Current - Hold (Ih) (Max)	35 mA	35 mA
Operating Temperature Range	-40°C to 125°C (TJ)	-40°C to 125°C (TJ)
Package / Case	TO-220-3	TO-220-3
Mounting Type	Through Hole	Through Hole
Triac Type	Alternistor - Snubberless	Alternistor - Snubberless
Configuration	Single	Single
RoHS Status	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

The BTB06-600CWRG is a direct functional substitute for the Q2006RH4. Selection is supported by the following factors:

Product Status: The Q2006RH4 is obsolete; the BTB06-600CWRG is active and in production, ensuring long-term availability and supply chain stability.
Electrical Compatibility: All gate trigger parameters, hold current, and on-state current ratings are identical. The higher voltage rating (600 V) provides additional design margin without affecting performance in 200 V circuits.
Mechanical Compatibility: Both components use TO-220-3 through-hole packaging, enabling direct PCB footprint compatibility.
Compliance: Both parts are ROHS3 compliant, meeting regulatory requirements for electronic components.
Inventory Status: The BTB06-600CWRG has significantly higher stock availability (2010 pcs) compared to the obsolete Q2006RH4 (755 pcs), supporting production continuity.

Frequently Asked Questions (FAQ)

Q: Can the BTB06-600CWRG replace the Q2006RH4 in existing designs without circuit modification?

A: Yes. The BTB06-600CWRG is electrically and mechanically compatible. Gate trigger voltage, gate trigger current, hold current, and on-state current ratings are identical. The higher voltage rating does not require circuit changes for 200 V applications.

Q: Why is the BTB06-600CWRG rated for 600 V when the Q2006RH4 is only 200 V?

A: The 600 V rating represents an uprated specification from STMicroelectronics. In applications operating at 200 V, this higher rating provides additional voltage margin and does not affect circuit performance or component selection criteria.

Q: Are the packages identical?

A: Yes. Both the Q2006RH4 and BTB06-600CWRG use TO-220-3 through-hole packaging. PCB footprints and mounting requirements are identical.

Q: What is the difference between the Q2006RH4 and BTB06-600CWRG in terms of gate triggering?

A: There is no functional difference. Both components have a maximum gate trigger voltage (Vgt) of 1.3 V and maximum gate trigger current (Igt) of 35 mA. Gate drive circuits designed for the Q2006RH4 will operate identically with the BTB06-600CWRG.

Q: Is the BTB06-600CWRG available in the same packaging format?

A: Yes. The BTB06-600CWRG is supplied in TO-220 non-isolated tab packaging, matching the Q2006RH4 mechanical specifications. Packaging format is Tube for the substitute part.

Q: Are there any compliance or certification differences?

A: Both parts are ROHS3 compliant. The BTB06-600CWRG carries additional REACH Unaffected status, providing expanded regulatory coverage for international applications.

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