QJ8016RH5TP TRIAC Equivalent & Substitute Parts

Part Overview

The QJ8016RH5TP is an 800V 16A Alternistor-class TRIAC manufactured by Littelfuse Inc. in TO-220AB packaging. This snubberless thyristor is designed for alternating current switching applications requiring high voltage isolation and controlled gate triggering. The part maintains active product status with 931 units in current inventory. Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and thermal operating ranges to ensure direct circuit board replacement capability.

Substiute Parts

QJ8016RH5TP

Littelfuse Inc.In Stock: 991QJ8016RH5TP Datasheet

Current PartRFQ

BT139-800,127

WeEn SemiconductorsIn Stock: 2094BT139-800,127 Datasheet

MFR RecommendedRFQ

BTA16-800BRG

STMicroelectronicsIn Stock: 22209BTA16-800BRG Datasheet

MFR RecommendedRFQ

BTA225-800B,127

WeEn SemiconductorsIn Stock: 2234BTA225-800B,127 Datasheet

MFR RecommendedRFQ

BTA420-800BT,127

WeEn SemiconductorsIn Stock: 4738BTA420-800BT,127 Datasheet

MFR RecommendedRFQ

BTB16-800BWRG

STMicroelectronicsIn Stock: 25301BTB16-800BWRG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the QJ8016RH5TP is determined by the following criteria:

Primary Matching Parameters:

• Voltage - Off State: 800 V (exact match required)
• Current - On State (It (RMS)) (Max): 16 A minimum
• Package / Case: TO-220-3 (mechanical compatibility)
• Mounting Type: Through Hole
• Configuration: Single

Secondary Compatibility Parameters:

• Voltage - Gate Trigger (Vgt) (Max): ≤ 1.5 V
• Current - Gate Trigger (Igt) (Max): ≤ 50 mA
• Current - Hold (Ih) (Max): ≤ 50 mA
• Operating Temperature: Must support minimum -40°C to 125°C range

Substitute parts are grouped into two categories: direct equivalents (matching Alternistor type and all primary parameters) and functional substitutes (standard TRIAC type with equivalent electrical performance within specified tolerances).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Alternistor Type):

BTB16-800BWRG (STMicroelectronics) is the closest functional equivalent, matching the Alternistor-Snubberless classification and all primary electrical parameters. Operating temperature range is -40°C to 125°C, which covers the minimum required thermal envelope. This part is ROHS3 compliant with highest inventory availability (25,200 units).

Functional Substitutes (Standard TRIAC Type):

BTA16-800BRG (STMicroelectronics) matches the 16A current rating and 800V voltage specification with identical gate trigger voltage (1.3V). Operating temperature range of -40°C to 125°C meets application requirements. ROHS3 compliant with 22,165 units in stock.

BT139-800,127 (WeEn Semiconductors) provides 16A at 800V with gate trigger voltage of 1.5V (within tolerance). Current inventory of 2,040 units supports availability. ROHS3 compliant.

Higher Current Alternatives:

BTA420-800BT,127 (WeEn Semiconductors) offers 20A current capacity at 800V with superior gate trigger voltage (1.0V) and extended operating temperature to 150°C, matching the original part's thermal range. ROHS3 compliant with 4,663 units available.

BTA225-800B,127 (WeEn Semiconductors) provides 25A capacity at 800V for applications requiring higher current margin. Operating temperature limited to 125°C. ROHS3 compliant with 2,200 units in stock.

All substitute parts maintain TO-220-3 package compatibility and through-hole mounting configuration.

Frequently Asked Questions (FAQ)

Q: Can BT139-800,127 directly replace QJ8016RH5TP in all applications?

A: BT139-800,127 is electrically compatible for 800V 16A applications. The gate trigger voltage is 1.5V versus 1.3V on the original part, which remains within acceptable circuit design margins. The primary difference is classification as a standard TRIAC versus Alternistor-Snubberless type. Verify gate drive circuit compatibility with the slightly higher trigger voltage specification.

Q: What is the difference between Alternistor and Standard TRIAC types?

A: Alternistor-class TRIACs (QJ8016RH5TP, BTB16-800BWRG) are snubberless designs optimized for reduced EMI and improved switching characteristics. Standard TRIACs (BT139, BTA16, BTA420, BTA225) provide equivalent voltage and current ratings but may require snubber networks in sensitive applications. Both types are electrically interchangeable when gate drive and thermal requirements are met.

Q: Is the TO-220AB package compatible with TO-220 footprints?

A: TO-220AB and TO-220 are mechanically compatible for through-hole mounting. Both use identical lead spacing and hole patterns. The AB designation indicates additional mechanical features but does not affect PCB assembly compatibility.

Q: Which substitute part has the best thermal performance?

A: BTA420-800BT,127 supports operating temperature to 150°C, matching the original QJ8016RH5TP specification. BTB16-800BWRG and BTA16-800BRG are rated to 125°C. For applications requiring the full -40°C to 150°C range, BTA420-800BT,127 is the appropriate selection.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant. BTA225-800B,127 and BTA420-800BT,127 are REACH Affected; remaining parts are REACH Unaffected. Verify compliance requirements for your specific application and supply chain.

Q: What is the current rating difference between 16A and 20A/25A parts?

A: BTA420-800BT,127 (20A) and BTA225-800B,127 (25A) provide higher current capacity than the 16A original specification. These parts are suitable for applications requiring additional current margin or for designs where higher current capability is beneficial. They maintain 800V voltage rating and TO-220-3 package compatibility.