Teccor brand Quadrac devices are triacs that include a diac trigger mounted inside the same package. This device, developed by Littelfuse, saves the user the expense and assembly time of buying a discrete diac and assembling in conjunction with a gated triac. Also, the alternistor Quadrac device (QxxxxLTH) eliminates the need for a snubber network.The Quadrac device is a bidirectional AC switch and is gate controlled for either polarity of main terminal voltage. Its primary purpose is for AC switching and phase control applications such as speed controls, temperature modulation controls, and lighting controls where noise immunity is required.Triac current capacities range from 4A to 15A with voltage ranges from 200V to 600V. Quadrac devices are available in the TO-220 package.The TO-220 package is electrically isolated to 2500V rms from the leads to mounting surface. 4000V rms is available on special order. This means that no external isolation is required, thus eliminating the need for separate insulators and insulator-mounting steps and saving dollars over "hot tab" devices. All Teccor triac and diac chips have glass-passivated junctions to ensure long-term device reliability and parameter stability.Variations
TRIAC Internally Triggered 400V 8A Through Hole TO-220 Isolated Tab
TRIAC With INT Trigger, 400V V(DRM), 8A I(T)RMS, TO-220AB, ROHS COMPLIANT, PLASTIC, ISOLATED TO-220AB, 3 PIN Product overview: Q4008LT from Littelfuse is a Triac for embedded electronics, industrial equipment, maintenance repair, OEM production, and component sourcing. It is useful for engineers and buyers comparing datasheets, replacement parts, BOM lines, package options, lifecycle status, and procurement availability. Key searchable attributes include Isolated, 400V, 8A. Search-friendly keywords include Triac, TRIACs, electronic component, datasheet, replacement part, Isolated, 400V, 8A. This listing supports clearer product discovery for industrial, commercial, repair, automation, power, sensing, and embedded system projects. Product number 300-Q4008LT can be used for catalog matching and distributor lookup.
Manufacturer: Littelfuse Inc.
Win Source Part Number: 042268-Q4008LT
Packaging: Tube/Rail
Mounting: Through Hole
Current - Hold (Ih) (Max): 60mA
Configuration: Single
Voltage - Off State: 400V
Current - On State (It (RMS)) (Max): 8A
Current - Non Rep. Surge 50, 60Hz (Itsm): 83A, 100A
Triac Type: Internally Triggered
Categories: Discrete Semiconductor Products
Status: Active
Temperature Range - Operating: -40°C to 125°C (TJ)
Case / Package: TO-220AB-L
Popularity: Medium
Fake Threat In the Open Market: 47 pct.
Supply and Demand Status: Balance
TRIAC, QUADRAC, 400V, 8A, TO-220AB; Peak Repetitive Off State Voltage:400V; On State RMS Current:8A; Triac Case Style:TO-220; Gate Trigger Voltage Max:-; Peak Non Repetitive Surge Current:83A; Holding Current Max:60mA; MSL:- RoHS Compliant: Yes
TRIAC INT TRIGGER 400V 8A TO220
| Littelfuse, Inc. | DigiKey | ERSAELECTRONICS PTE. LTD. | Win Source Electronics | VAST STOCK CO., LIMITED | Newark, An Avnet Company | Shenzhen Shengyu Electronics Technology Limited | |
|---|---|---|---|---|---|---|---|
| Product Category | Triacs | Thyristors | Triacs | Triacs | Thyristors | Triacs | Triacs |
| Product Number | Q4008LT | Q4008LT-ND | 300-Q4008LT | 042268-Q4008LT | Q4008LT | 12J0414 | Q4008LT |
| Product Name | Power Semiconductors & Control ICs - Thyristors (SCR & TRIAC) - QUADRAC - Series: QxxxxLTx - Q4008LT | TRIACs | Isolated 400V 8A Triac | Triacs - Q4008LT | Triacs | Triac, Quadrac, 400V, 8A, To-220Ab; Peak Repetitive Off State Voltage Littelfuse | Discrete Semiconductor Products - Thyristors - TRIACs |
| Standards and Certifications | RoHS | RoHS | RoHS | ||||
| VTM | 1.6 volts | ||||||
| IT(RMS) | 8 amps | 8 amps | |||||
| Package Type | TO-220; TO-220-3 Isolated Tab | TO-220-3 | TO-220AB-L | TO-220; TO-220 | TO-220-3 Isolated Tab |
