Q8008R5TP Equivalent & Substitute Parts

Part Overview

The Q8008R5TP is a standard TRIAC manufactured by Littelfuse Inc., rated for 800V off-state voltage and 8A on-state current in a TO-220AB through-hole package. This component is classified as Active product status with full RoHS3 compliance. Substitute parts are identified when equivalent electrical ratings and mechanical compatibility are maintained across the specified parameter set, enabling direct replacement in circuit applications where the original part becomes unavailable or inventory constraints require alternative sourcing.

Key Parameters

Parameter	Value
Voltage - Off State	800 V
Current - On State (It (RMS)) (Max)	8 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°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-220-3
Configuration	Single
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the Q8008R5TP are qualified based on the following criteria:

Electrical Parameter Compatibility:

Off-state voltage rating of 800V or higher
On-state current rating of 8A or higher
Gate trigger voltage (Vgt) of 1.3V or lower
Gate trigger current (Igt) of 50mA or lower
Hold current (Ih) of 50mA or lower
Operating temperature range encompassing -40°C to 125°C

Mechanical Compatibility:

Through-hole mounting configuration
TO-220-3 package / case designation
Single configuration

The substitute parts BTA10-800BWRG and BTB10-800BWRG from STMicroelectronics meet all specified electrical and mechanical parameters, with on-state current ratings of 10A, providing margin above the 8A requirement of the Q8008R5TP.

Parameter Comparison

Parameter	Q8008R5TP (Littelfuse)	BTA10-800BWRG (STMicroelectronics)	BTB10-800BWRG (STMicroelectronics)
Voltage - Off State	800 V	800 V	800 V
Current - On State (It (RMS)) (Max)	8 A	10 A	10 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V	1.3 V	1.3 V
Current - Gate Trigger (Igt) (Max)	50 mA	50 mA	50 mA
Current - Hold (Ih) (Max)	50 mA	50 mA	50 mA
Operating Temperature Range	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3	TO-220-3	TO-220-3
Configuration	Single	Single	Single
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Both BTA10-800BWRG and BTB10-800BWRG are qualified substitutes for the Q8008R5TP based on electrical parameter equivalence and mechanical compatibility. All three parts maintain Active product status and ROHS3 compliance. The substitute parts from STMicroelectronics are classified as Alternistor - Snubberless devices with on-state current ratings of 10A, which exceeds the 8A requirement of the original Q8008R5TP. Selection between the two STMicroelectronics alternatives should be based on application-specific requirements and inventory availability, as both parts satisfy the specified parameter set.

Frequently Asked Questions (FAQ)

Q: Can BTA10-800BWRG or BTB10-800BWRG directly replace Q8008R5TP in existing designs?

A: Yes. Both substitute parts maintain identical off-state voltage (800V), gate trigger voltage (1.3V maximum), gate trigger current (50mA maximum), hold current (50mA maximum), and operating temperature range (-40°C to 125°C). The higher on-state current rating (10A versus 8A) provides operational margin. Through-hole mounting and TO-220-3 package compatibility enable direct PCB substitution.

Q: What is the difference between BTA10-800BWRG and BTB10-800BWRG?

A: Both parts share identical electrical ratings and package specifications. Selection between them should be determined by application requirements and supplier availability, as the provided parameter set does not differentiate their functional characteristics.

Q: Are there any compliance or certification differences between the original and substitute parts?

A: All three parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), REACH Unaffected status, and EAR99 ECCN classification. No compliance or certification barriers exist for substitution.

Q: What is the significance of the higher 10A current rating on the substitute parts?

A: The substitute parts are rated for 10A on-state current, compared to 8A for the Q8008R5TP. This higher rating provides design margin and does not create incompatibility, as the substitute parts will operate within specification when the circuit demands 8A or less.

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