Q8025NH6TP TRIAC Alternistor 800V 25A Equivalent & Substitute Parts

Part Overview

The Q8025NH6TP is a Littelfuse TRIAC Alternistor operating at 800V with 25A on-state current in a Surface Mount TO-263 (D2PAK) package. This snubberless design is classified as Active product status with full RoHS3 compliance. Equivalent and substitute parts are identified based on matching electrical ratings, package compatibility, and thermal operating range to ensure direct functional replacement in circuit applications.

Substiute Parts

Q8025NH6TP

Littelfuse Inc.In Stock: 983Q8025NH6TP Datasheet

Current PartRFQ

T1210-800G-TR

STMicroelectronicsIn Stock: 1464T1210-800G-TR Datasheet

MFR RecommendedRFQ

T1235-800G-TR

STMicroelectronicsIn Stock: 1660T1235-800G-TR Datasheet

MFR RecommendedRFQ

T2535-800G

STMicroelectronicsIn Stock: 1266T2535-800G Datasheet

MFR RecommendedRFQ

T2535-800G-TR

STMicroelectronicsIn Stock: 3510T2535-800G-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the Q8025NH6TP is based on the following critical parameters:

Primary Matching Criteria:

• Voltage - Off State: 800 V (exact match required)
• Package / Case: TO-263-3, D2PAK (mechanical and thermal compatibility)
• Mounting Type: Surface Mount
• Operating Temperature Range: -40°C ~ 125°C (TJ)
• RoHS3 Compliance and MSL Level 1

Current Rating Consideration: Substitute parts are grouped into two categories based on on-state current capacity:

• Full-rated substitutes: 25 A on-state current (direct replacement)
• Reduced-current substitutes: 12 A on-state current (application-dependent)

Gate Trigger Characteristics: Substitutes maintain Vgt (Max) at 1.3 V. Gate trigger current (Igt) and hold current (Ih) vary by TRIAC type (Alternistor vs. Logic - Sensitive Gate), affecting gate drive requirements.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Full Current Rating - 25A):

T2535-800G-TR and T2535-800G are direct functional equivalents to the Q8025NH6TP. Both maintain 25A on-state current, 800V off-state voltage, and identical operating temperature range. The primary difference is packaging format: T2535-800G-TR is supplied in Cut Tape (CT) & Digi-Reel format with 3475 units in stock, while T2535-800G is supplied in Tube format with 1245 units in stock. Both are STMicroelectronics Snubberless Alternistor devices with Active product status and full RoHS3 compliance.

Reduced-Current Substitutes (12A Rating):

T1235-800G-TR and T1210-800G-TR are suitable for applications where on-state current requirements do not exceed 12A. T1235-800G-TR is an Alternistor - Snubberless device with gate trigger current of 35 mA, matching the full-rated 25A substitutes. T1210-800G-TR is a Logic - Sensitive Gate TRIAC with significantly lower gate trigger current of 10 mA and hold current of 15 mA, requiring reduced gate drive power. Both maintain 800V off-state voltage and identical thermal operating range. Selection between these two depends on gate drive circuit capability and application requirements.

All substitute parts maintain RoHS3 compliance, MSL Level 1 (Unlimited), and Active product status, ensuring regulatory and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can T2535-800G-TR directly replace Q8025NH6TP in all applications?

A: Yes, T2535-800G-TR is a direct functional equivalent. Both devices share identical electrical ratings (800V, 25A), gate trigger voltage (1.3V max), operating temperature range (-40°C to 125°C), and D2PAK package. The only difference is the packaging format (Cut Tape & Digi-Reel vs. Tube) and manufacturer (STMicroelectronics vs. Littelfuse).

Q: What is the difference between T2535-800G and T2535-800G-TR?

A: Both parts are electrically and mechanically identical STMicroelectronics Snubberless Alternistor TRIACs rated at 800V and 25A. The difference is packaging: T2535-800G is supplied in Tube format, while T2535-800G-TR is supplied in Cut Tape (CT) & Digi-Reel format. Selection depends on assembly process requirements and inventory management preferences.

Q: Can I use T1235-800G-TR or T1210-800G-TR as substitutes for Q8025NH6TP?

A: These 12A-rated devices are substitutes only for applications where on-state current does not exceed 12A. They maintain the same 800V off-state voltage, D2PAK package, and operating temperature range. Gate trigger characteristics differ: T1235-800G-TR has 35 mA gate trigger current (matching full-rated devices), while T1210-800G-TR has 10 mA, requiring lower gate drive power. Do not use in circuits requiring sustained 25A operation.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts (T2535-800G-TR, T2535-800G, T1235-800G-TR, and T1210-800G-TR) are RoHS3 compliant with MSL Level 1 (Unlimited), matching the compliance profile of Q8025NH6TP.

Q: What is the difference between Alternistor - Snubberless and Logic - Sensitive Gate TRIAC types?

A: Alternistor - Snubberless devices (Q8025NH6TP, T2535-800G-TR, T2535-800G, T1235-800G-TR) are optimized for snubberless operation with higher gate trigger and hold currents. Logic - Sensitive Gate devices (T1210-800G-TR) feature lower gate trigger current (10 mA vs. 35-80 mA) and lower hold current (15 mA vs. 35-100 mA), reducing gate drive circuit power requirements. Selection depends on gate drive circuit design and application constraints.

Q: Do all substitute parts use the same D2PAK package?

A: Yes, all substitute parts use the TO-263-3 D2PAK (2 Leads + Tab) package, ensuring mechanical and thermal compatibility with Q8025NH6TP. PCB layout and thermal management considerations remain identical across all listed parts.