QJ8025NH5RP TRIAC Alternistor 800V 25A Equivalent & Substitute Parts

Part Overview

The QJ8025NH5RP is a snubberless TRIAC Alternistor manufactured by Littelfuse Inc., rated for 800V off-state voltage and 25A on-state current in a surface mount TO-263 (D2PAK) package. This component is designed for AC switching applications requiring high voltage and current handling capability. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified based on matching electrical specifications and package compatibility to support procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Off State	800	V
Current - On State (It (RMS)) (Max)	25	A
Voltage - Gate Trigger (Vgt) (Max)	1.3	V
Current - Gate Trigger (Igt) (Max)	50	mA
Current - Hold (Ih) (Max)	50	mA
Operating Temperature Range	-40 to 150	°C
Package / Case	TO-263-3, D2PAK	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the QJ8025NH5RP is determined by the following critical electrical and mechanical parameters:

Voltage - Off State: 800V minimum
Current - On State (It (RMS)): 25A minimum
Triac Type: Alternistor - Snubberless configuration
Package / Case: TO-263-3 (D2PAK) surface mount
Gate Trigger Voltage (Vgt): 1.3V maximum
Gate Trigger Current (Igt): 50mA maximum
Hold Current (Ih): 50mA maximum
Configuration: Single TRIAC
RoHS3 Compliance: Required

The identified substitute parts meet all critical electrical specifications and package requirements. Variations in non-rep surge current ratings and operating temperature maximums do not preclude substitution when the primary switching parameters are matched.

Parameter Comparison

Parameter	QJ8025NH5RP (Littelfuse)	T2535-800G (STMicroelectronics)	T2535-800G-TR (STMicroelectronics)
Voltage - Off State	800 V	800 V	800 V
Current - On State (It (RMS)) (Max)	25 A	25 A	25 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V	1.3 V	1.3 V
Current - Gate Trigger (Igt) (Max)	50 mA	35 mA	35 mA
Current - Hold (Ih) (Max)	50 mA	50 mA	50 mA
Current - Non Rep. Surge 50, 60Hz (Itsm)	208A, 250A	250A, 260A	250A, 260A
Operating Temperature Range	-40 to 150°C	-40 to 125°C	-40 to 125°C
Package / Case	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK
Triac Type	Alternistor - Snubberless	Alternistor - Snubberless	Alternistor - Snubberless
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Tape & Reel (TR)	Tube	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

Both T2535-800G and T2535-800G-TR from STMicroelectronics are functionally equivalent to the QJ8025NH5RP for 800V 25A TRIAC Alternistor applications. Selection between these options is based on packaging and procurement requirements:

T2535-800G-TR offers the highest inventory availability (3475 Pcs) and is supplied in Cut Tape (CT) & Digi-Reel® format, suitable for automated assembly processes.
T2535-800G is supplied in Tube packaging with 1245 Pcs available inventory.
All three parts maintain active product status and full RoHS3 compliance.

The STMicroelectronics parts feature lower maximum gate trigger current (35mA vs. 50mA) and higher non-rep surge current ratings (250A, 260A vs. 208A, 250A), both favorable characteristics for switching performance. Operating temperature maximum is reduced to 125°C compared to 150°C on the Littelfuse part; this difference is not a substitution barrier when application requirements do not exceed 125°C junction temperature.

Frequently Asked Questions (FAQ)

Q: Can T2535-800G-TR be used as a direct replacement for QJ8025NH5RP in existing designs?

A: Yes. Both parts are snubberless TRIAC Alternistors with identical 800V off-state voltage, 25A on-state current, and 1.3V gate trigger voltage. The TO-263 (D2PAK) package and pin configuration are identical. The lower gate trigger current (35mA vs. 50mA) on the STMicroelectronics part is a performance advantage. If your application operates above 125°C junction temperature, verify thermal design compatibility before substitution.

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

A: Both parts are electrically identical. The difference is packaging format: T2535-800G is supplied in Tube, while T2535-800G-TR is supplied in Cut Tape (CT) & Digi-Reel® format. T2535-800G-TR is recommended for high-volume automated assembly due to superior tape reel compatibility and higher available inventory.

Q: Are there any compliance or certification differences between these parts?

A: No. All three parts (QJ8025NH5RP, T2535-800G, and T2535-800G-TR) are RoHS3 compliant, REACH unaffected, and carry the same ECCN (EAR99) and HTSUS (8541.30.0080) classifications. Moisture sensitivity level is 1 (Unlimited) for all parts.

Q: What parameters must match for TRIAC Alternistor substitution?

A: Critical matching parameters are: off-state voltage (800V), on-state current rating (25A), gate trigger voltage (1.3V maximum), package type (TO-263 D2PAK), and snubberless configuration. Gate trigger current and hold current may vary within acceptable limits without affecting substitution validity.

Q: Can I substitute these parts in high-temperature applications?

A: The QJ8025NH5RP supports operation to 150°C junction temperature, while T2535-800G and T2535-800G-TR are rated to 125°C. If your application requires sustained operation above 125°C, the Littelfuse part is the appropriate choice. For applications below 125°C, the STMicroelectronics parts are fully suitable.

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