Qxx25xx/Qxx25xHx Series - 25 Amp Standard & Alternistor (High Commutation) Triacs

Roll Over to Zoom
Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

25 Amp bi-directional solid state switch series is designed for AC switching and phase control applications such as motor speed and temperature modulation controls, lighting controls, and static switching relays.

Standard type devices normally operate in Quadrants I & III triggered from AC line. Alternistor type devices only operate in quadrants I, II, & III and are used in circuits requiring high dv/dt capability.

Features & Benefits:

  • RoHS compliant
  • Glass — passivated junctions
  • Voltage capability up to 1000 V
  • Surge capability up to 250 A


  • Excellent for AC switching and phase control applications such as heating, lighting, and motor speed controls.
  • Typical applications are AC solid-state switches, industrial power tools, exercise equipment, white goods and commercial appliances.
  • Alternistor Triacs (no snubber required) are used in applications with extremely inductive loads requiring highest commutation performance.
  • Internally constructed isolated packages are offered for ease of heat sinking with highest isolation voltage.

Access specifications, certifications, check availability and order parts below

Catalog #SizeIT(RMS) (A)VDRM (V)IDRM@
di/dt @
Q4025J6TPTO-218 Isolated Tab254000.018080801.8250100Eyelet LeadsCheckOrder
Q4025K6TPTO-218 Isolated Tab254000.018080801.8250100Through Hole RadialCheckOrder
Q4025L6TPTO-220 Isolated Tab254000.018080801.8250100Through Hole RadialCheckOrder
Q4025LH5TPTO-220 Isolated Tab254000.015050501.8250100Through Hole RadialCheckOrder
Q4025N5TO-263 (D2Pak)254000.015050501.8200100Surface MountCheckOrder
Q4025NH5TO-263 (D2Pak)254000.015050501.8250100Surface MountCheckOrder
Q4025NH6TO-263 (D2Pak)254000.018080801.8250100Surface MountCheckOrder
Q4025R5TPTO-220 Non-Isolated Tab254000.015050501.8200100Through Hole RadialCheckOrder
Q4025R6TPTO-220 Non-Isolated Tab254000.018080801.8250100Through Hole RadialCheckOrder
Q4025RH5TPTO-220 Non-Isolated Tab254000.015050501.8250100Through Hole RadialCheckOrder
Q6025J6TPTO-218 Isolated Tab256000.018080801.8250100Eyelet LeadsCheckOrder
Q6025K6TPTO-218 Isolated Tab256000.018080801.8250100Through Hole RadialCheckOrder
Q6025L6TPTO-220 Isolated Tab256000.018080801.8250100Through Hole RadialCheckOrder
Q6025LH5TPTO-220 Isolated Tab256000.018080801.8250100Through Hole RadialCheckOrder
Q6025N5TO-263 (D2Pak)256000.015050501.8200100Surface MountCheckOrder
Q6025NH5TO-263 (D2Pak)256000.015050501.8250100Surface MountCheckOrder
Q6025NH6TO-263 (D2Pak)256000.018080801.8250100Surface MountCheckOrder
Q6025P5TO-3 / TO-239 (Fastpak)256000.15050501.4250100Quick ConnectCheck
Q6025R5TPTO-220 Non-Isolated Tab256000.015050501.8200100Through Hole RadialCheckOrder
Q6025R6TPTO-220 Non-Isolated Tab256000.018080801.8250100Through Hole RadialCheckOrder
Q6025RH5TPTO-220 Non-Isolated Tab256000.015050501.8250100Through Hole RadialCheckOrder
Q8025J6TPTO-218 Isolated Tab258000.018080801.8250100Eyelet LeadsCheckOrder
Q8025K6TPTO-218 Isolated Tab258000.018080801.8250100Through Hole RadialCheckOrder
Q8025L6TPTO-220 Isolated Tab258000.018080801.8250100Through Hole RadialCheckOrder
Q8025LH5TPTO-220 Isolated Tab258000.015050501.8250100Through Hole RadialCheckOrder
Q8025N5TO-263 (D2Pak)258000.015050501.8200100Surface MountCheckOrder
Q8025NH5TO-263 (D2Pak)258000.015050501.8250100Surface MountCheckOrder
Q8025NH6TO-263 (D2Pak)258000.018080801.8250100Surface MountCheckOrder
Q8025R5TPTO-220 Non-Isolated Tab258000.015050501.8200100Through Hole RadialCheckOrder
Q8025R6TPTO-220 Non-Isolated Tab258000.018080801.8250100Through Hole RadialCheckOrder
Q8025RH5TPTO-220 Non-Isolated Tab258000.015050501.8250100Through Hole RadialCheckOrder
QK025K6TPTO-218 Isolated Tab2510000.028080801.8250100Through Hole RadialCheckOrder
QK025L6TPTO-220 Isolated Tab2510000.028080801.8250100Through Hole RadialCheckOrder
QK025N5TO-263 (D2Pak)2510000.025050501.8200100Surface MountCheckOrder
QK025NH6TO-263 (D2Pak)2510000.028080801.8250100Surface MountCheckOrder
QK025R5TPTO-220 Non-Isolated Tab2510000.025050501.8200100Through Hole RadialCheckOrder
QK025R6TPTO-220 Non-Isolated Tab2510000.028080801.8250100Through Hole RadialCheckOrder
Obsolete: 2008 -09-01
Replaced By: Q2025J6TP
TO-218 Isolated Tab252000.058080801.8250100Eyelet LeadsCheck
Obsolete: 2011 -12-31
Replaced By: Q4025J6TP
TO-218 Isolated Tab252000.058080801.8250100Eyelet LeadsCheck
Obsolete: 2008 -09-01
Replaced By: Q2025K6TP
TO-218 Isolated Tab252000.058080801.8250100Through Hole RadialCheck
Obsolete: 2011 -12-31
Replaced By: Q4025K6TP
TO-218 Isolated Tab252000.058080801.8250100Through Hole RadialCheck
Obsolete: 2011 -12-31
Replaced By: Q4025L6
TO-220 Isolated Tab252000.058080801.8250100Through Hole RadialCheck
Obsolete: 2011 -12-31
Replaced By: Q4025N5
TO-263 (D2Pak)252000.15050501.8200100Surface MountCheck
Obsolete: 2011 -12-31
Replaced By: Q4025NH6
TO-263 (D2Pak)252000.058080801.8250100Surface MountCheck
Obsolete: 2011 -12-31
Replaced By: Q4025R5
TO-220 Non-Isolated Tab252000.15050501.8200100Through Hole RadialCheck
Obsolete: 2011 -12-31
Replaced By: Q4025R6
TO-220 Non-Isolated Tab252000.058080801.8250100Through Hole RadialCheck
Obsolete: 2008 -09-01
Replaced By: Q4025J6TP
TO-218 Isolated Tab254000.058080801.8250100Eyelet LeadsCheck
Obsolete: 2008 -09-01
Replaced By: Q4025K6TP
TO-218 Isolated Tab254000.058080801.8250100Through Hole RadialCheck
Obsolete: 2016 -03-31
Replaced By: Q4025L6TP
TO-220 Isolated Tab254000.018080801.8250100Through Hole RadialCheck
Obsolete: 2016 -03-31
Replaced By: Q4025LH5TP
TO-220 Isolated Tab254000.015050501.8250100Through Hole RadialCheck
Obsolete: 2016 -03-31
Replaced By: Q4025R5TP
TO-220 Non-Isolated Tab254000.015050501.8200100Through Hole RadialCheck
Obsolete: 2016 -03-31
Replaced By: Q4025R6TP
TO-220 Non-Isolated Tab254000.018080801.8250100Through Hole RadialCheck
Obsolete: 2016 -03-31
Replaced By: Q4025RH5TP
TO-220 Non-Isolated Tab254000.015050501.8250100Through Hole RadialCheck
Obsolete: 2008 -09-01
Replaced By: Q6025J6TP
TO-218 Isolated Tab256000.058080801.8250100Eyelet LeadsCheck
Obsolete: 2008 -09-01
Replaced By: Q6025K6TP
TO-218 Isolated Tab256000.058080801.8250100Through Hole RadialCheck
Obsolete: 2016 -03-31
Replaced By: Q6025L6TP
TO-220 Isolated Tab256000.018080801.8250100Through Hole RadialCheck
Obsolete: 2016 -03-31
Replaced By: Q6025LH5TP
TO-220 Isolated Tab256000.018080801.8250100Through Hole RadialCheck
Obsolete: 2016 -03-31
Replaced By: Q6025R5TP
TO-220 Non-Isolated Tab256000.015050501.8200100Through Hole RadialCheck
Obsolete: 2016 -03-31
Replaced By: Q6025R6TP
TO-220 Non-Isolated Tab256000.018080801.8250100Through Hole RadialCheck
Obsolete: 2016 -03-31
Replaced By: Q6025RH5TP
TO-220 Non-Isolated Tab256000.015050501.8250100Through Hole RadialCheck
Obsolete: 2008 -09-01
Replaced By: Q8025J6TP
TO-218 Isolated Tab258000.18080801.8250100Eyelet LeadsCheck
Obsolete: 2008 -09-01
Replaced By: Q8025K6TP
TO-218 Isolated Tab258000.18080801.8250100Through Hole RadialCheck
Obsolete: 2016 -03-31
Replaced By: Q8025L6TP
TO-220 Isolated Tab258000.018080801.8250100Through Hole RadialCheck
Obsolete: 2016 -03-31
Replaced By: Q8025LH5TP
TO-220 Isolated Tab258000.015050501.8250100Through Hole RadialCheck
Obsolete: 2016 -04-01
TO-3 / TO-239 (Fastpak)258000.15050501.4250100Quick ConnectCheck
Obsolete: 2016 -03-31
Replaced By: Q8025R5TP
TO-220 Non-Isolated Tab258000.015050501.8200100Through Hole RadialCheck
Obsolete: 2016 -03-31
Replaced By: Q8025R6TP
TO-220 Non-Isolated Tab258000.018080801.8250100Through Hole RadialCheck
Obsolete: 2016 -03-31
Replaced By: Q8025RH5TP
TO-220 Non-Isolated Tab258000.015050501.8250100Through Hole RadialCheck
Obsolete: 2008 -09-01
Replaced By: QK025K6TP
TO-218 Isolated Tab2510000.18080801.8250100Through Hole RadialCheck
Obsolete: 2016 -03-31
Replaced By: QK025L6TP
TO-220 Isolated Tab2510000.028080801.8250100Through Hole RadialCheck
Obsolete: 2016 -03-31
Replaced By: QK025R5TP
TO-220 Non-Isolated Tab2510000.025050501.8200100Through Hole RadialCheck
Obsolete: 2016 -03-31
Replaced By: QK025R6TP
TO-220 Non-Isolated Tab2510000.028080801.8250100Through Hole RadialCheck
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
Q4025J6TP RoHS No 01/01/1996 PbFree No
Q4025K6TP RoHS No 01/01/1996 PbFree No
Q4025L6TP RoHS No 01/01/1996 PbFree No 06/16/2015 CoC_RoHS9_Q4025L6TP_03-22-2019 REACH197_Declaration_with_Pb_Q4025L6TP_03-22-2019 Yes
Does not Contain
Q4025N5RP RoHS No 01/01/1996 PbFree No CoC_RoHS9_Q4025N5RP_10-19-2020 REACH209_Declaration_-Contain-_Q4025N5RP_10-19-2020 Yes
Q4025N5TP RoHS No 01/01/1996 PbFree No Yes
Q4025NH5RP RoHS No 01/01/1996 PbFree No
Q4025NH5TP RoHS No 01/01/1996 PbFree No
Q6025J6TP RoHS No 01/01/1996 PbFree No
Q6025K6TP RoHS No 01/01/1996 PbFree No 07/09/2012 CoC_RoHS9_Q6025K6TP_10-23-2018 REACH191_Declaration_with_Pb_Q6025K6TP_10-23-2018 Yes
Does not Contain
Q6025L6TP RoHS No 01/01/1996 PbFree No 07/09/2012 CoC_RoHS9_Q6025L6TP_01-09-2018 REACH197_Declaration_with_Pb_Q6025L6TP_01-30-2019 Yes
Does not Contain
Q6025LH5TP RoHS No 01/01/1996 PbFree No 06/16/2015 CoC_RoHS9_Q6025LH5TP_09-04-2018 REACH191_Declaration_with_Pb_Q6025LH5TP_09-04-2018 Yes
Does not Contain
Q6025NH5RP RoHS No 01/01/1996 PbFree No
Q6025NH5TP RoHS No 01/01/1996 PbFree No
Q8025J6TP RoHS No 01/01/1996 PbFree No
Q8025K6TP RoHS No 01/01/1996 PbFree No 07/09/2012 CoC_RoHS9_Q8025K6TP_05-07-2018 REACH197_Declaration_with_Pb_Q8025K6TP_02-06-2019 Yes
Does not Contain
Q8025L6TP RoHS No 01/01/1996 PbFree No CoC_RoHS9_Q8025L6TP_02-22-2019 REACH197_Declaration_with_Pb_Q8025L6TP_02-22-2019 Yes
Does not Contain
Q8025NH5RP RoHS No 01/01/1996 PbFree No
Q8025NH5TP RoHS No 01/01/1996 PbFree No
QK025K6TP RoHS No 01/01/1996 PbFree No
QK025L6TP RoHS No PbFree No
QK025NH6RP RoHS No 01/01/1996 PbFree No
QK025NH6TP RoHS No 01/01/1996 PbFree No
If the product environmental information that you are looking for does not appear in this tab,
please complete the Product Environmental Information Request Form.

2021-08-12_IATF 16949_ LF Semiconductor_Wuxi

pdf icon Product Selection Guide

Electronics Circuit Protection Product Selection Guide - A guide to selecting Littelfuse circuit protection components for electronic applications...

pdf icon Circuit Protection Technology Application Matrix

Littelfuse is the world leader in the design and manufacturing of fuses for the automotive, industrial, handheld, computer and telecom markets...

pdf icon Switching Thyristor Product Catalog