Q6008DH4TP TRIAC Alternistor 600V 8A Equivalent & Substitute Parts

Part Overview

The Q6008DH4TP is a snubberless TRIAC Alternistor rated for 600V off-state voltage and 8A on-state current in a surface mount TO-252 (DPAK) package. Manufactured by Littelfuse Inc., this component is actively produced and RoHS3 compliant. Equivalent and substitute parts may be required due to supply constraints, packaging preferences, or application-specific gate trigger characteristics.

Substiute Parts

Q6008DH4TP

Littelfuse Inc.In Stock: 1226Q6008DH4TP Datasheet

Current PartRFQ

MAC4DCMT4G

Littelfuse Inc.In Stock: 45277MAC4DCMT4G Datasheet

MFR RecommendedRFQ

MAC4DHMT4G

LittelfuseIn Stock: 119471MAC4DHMT4G Datasheet

MFR RecommendedRFQ

MAC4DLMT4G

Littelfuse Inc.In Stock: 31006MAC4DLMT4G Datasheet

MFR RecommendedRFQ

MAC4DSMT4G

Littelfuse Inc.In Stock: 19983MAC4DSMT4G Datasheet

MFR RecommendedRFQ

T835-600B

STMicroelectronicsIn Stock: 1297T835-600B Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Q6008DH4TP is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Voltage - Off State: 600 V (mandatory match)
• Current - On State (It (RMS)) (Max): 8 A minimum
• Voltage - Gate Trigger (Vgt) (Max): 1.3 V (mandatory match)
• Current - Non Rep. Surge 50, 60Hz (Itsm): 80A or higher
• Current - Gate Trigger (Igt) (Max): 35 mA maximum
• Current - Hold (Ih) (Max): 35 mA maximum
• Triac Type: Alternistor - Snubberless (functional equivalence)

Mechanical Compatibility Requirements:

• Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63
• Mounting Type: Surface Mount

Environmental & Compliance Requirements:

• Operating Temperature Range: -40°C ~ 125°C minimum
• RoHS3 Compliance: Required

The substitute part T835-600B from STMicroelectronics meets all electrical, mechanical, and compliance criteria as a parametric equivalent. The MAC4 series parts (MAC4DCMT4G, MAC4DHMT4G, MAC4DLMT4G, MAC4DSMT4G) are manufacturer-recommended alternatives but operate at reduced on-state current (4A maximum) and are classified as standard or logic-sensitive gate TRIACs rather than snubberless Alternistors. These parts are suitable only for applications where the 4A current rating is sufficient.

Parameter Comparison

Engineering Selection Recommendations

Direct Parametric Equivalent: T835-600B is the only substitute that maintains full electrical equivalence to the Q6008DH4TP. Both components are snubberless Alternistors with identical voltage, current, and gate trigger specifications. Both are RoHS3 compliant, REACH unaffected, and rated for -40°C to 125°C operation. Selection of T835-600B requires no circuit redesign or application re-evaluation.

Manufacturer-Recommended Alternatives (Current-Reduced): MAC4DCMT4G, MAC4DHMT4G, MAC4DLMT4G, and MAC4DSMT4G are manufacturer-recommended substitutes but operate at 4A on-state current versus the 8A rating of the Q6008DH4TP. These parts are suitable only for applications where load current does not exceed 4A. All four variants are RoHS3 compliant and actively produced.

MAC4DHMT4G and MAC4DLMT4G operate at reduced upper temperature limits (-40°C to 110°C) compared to the Q6008DH4TP. MAC4DLMT4G carries REACH Affected status, whereas the other MAC4 variants and the Q6008DH4TP are REACH Unaffected.

MAC4DHMT4G, MAC4DLMT4G, and MAC4DSMT4G feature logic-sensitive gate characteristics with reduced gate trigger current (3mA to 10mA) and hold current (15mA) compared to the standard 35mA specifications of the Q6008DH4TP. These lower gate current requirements may provide circuit design advantages in low-power gate drive applications.

Frequently Asked Questions (FAQ)

Q: Can MAC4DCMT4G, MAC4DHMT4G, MAC4DLMT4G, or MAC4DSMT4G be used as direct replacements for Q6008DH4TP?

A: These parts share the same package (TO-252 DPAK) and voltage rating (600V), but the on-state current rating is reduced from 8A to 4A. Direct substitution is possible only if the application load current does not exceed 4A. Circuit redesign or application re-evaluation is required for higher current applications.

Q: What is the difference between the Q6008DH4TP and T835-600B?

A: Both are snubberless Alternistor TRIACs with identical electrical specifications: 600V off-state voltage, 8A on-state current, 1.3V gate trigger voltage, and 35mA gate trigger and hold currents. The primary difference is manufacturer: Q6008DH4TP is manufactured by Littelfuse Inc., while T835-600B is manufactured by STMicroelectronics. Both are RoHS3 compliant and rated for -40°C to 125°C operation.

Q: Why do MAC4DHMT4G and MAC4DLMT4G have a lower maximum operating temperature?

A: MAC4DHMT4G and MAC4DLMT4G are rated for -40°C to 110°C junction temperature, compared to -40°C to 125°C for the Q6008DH4TP and other alternatives. Applications requiring operation above 110°C must use Q6008DH4TP, T835-600B, MAC4DCMT4G, or MAC4DSMT4G.

Q: What does "Logic - Sensitive Gate" mean in the MAC4 series?

A: Logic-sensitive gate TRIACs require lower gate trigger current (3mA to 10mA) and hold current (15mA) compared to standard TRIACs (35mA). This characteristic allows direct gate drive from low-power logic circuits without additional buffering, reducing component count and power consumption in gate drive circuits.

Q: Is MAC4DLMT4G suitable for new designs?

A: MAC4DLMT4G is RoHS3 compliant and actively produced, but carries REACH Affected status. Applications subject to REACH compliance requirements should use Q6008DH4TP, T835-600B, MAC4DCMT4G, or MAC4DSMT4G, which are all REACH Unaffected.

Q: Can I use T835-600B in place of Q6008DH4TP without any circuit modifications?

A: Yes. T835-600B is a parametric equivalent with identical electrical specifications, package, and operating temperature range. No circuit modifications are required.