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BT149G,126 is listed in the Scrs range at ChipApex. The manufacturer field lists WeEn Semiconductors. Its product description is SCR 600V 800MA TO92-3. Review the specifications below when checking this part for your BOM.
Scrs specifications for BT149G,126
- Description：SCR 600V 800MA TO92-3
- Series：-
- Mfr：WeEn Semiconductors
- Package：Cut Tape (CT),Tape & Box (TB)
- Voltage - Off State：600 V
- Voltage - Gate Trigger (Vgt) (Max)：800 mV
- Current - Gate Trigger (Igt) (Max)：200 µA
- Current - Hold (Ih) (Max)：5 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm)：8A, 9A
- SCR Type：Sensitive Gate
- Operating Temperature：-
- Grade：-
- Qualification：-
- Mounting Type：Through Hole
- Package / Case：TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Supplier Device Package：TO-92-3
- Voltage - On State (Vtm) (Max)：1.7 V
- Current - On State (It (AV)) (Max)：500 mA
- Current - On State (It (RMS)) (Max)：800 mA
- Current - Off State (Max)：100 µA
Scrs datasheet and documents for BT149G,126
Scrs Overview
The BT149G,126 is a planar passivated Silicon Controlled Rectifier (SCR) manufactured by WeEn Semiconductors. It features sensitive gate technology and is housed in a SOT-54 (TO-92) plastic package with radial leads. Key electrical parameters include a rated repetitive off-state voltage of 600 V, an RMS on-state current of 800 mA, and a non-repetitive peak on-state current of 9 A. The device operates at a maximum junction temperature of +125 °C and has a holding current of 5 mA.
Scrs Feature Summary
- Sensitive gate design allows direct interfacing with microcontrollers and logic ICs without requiring high drive currents.
- Planar passivated silicon construction ensures robust performance and reliability in industrial applications.
Scrs Applications
- Direct interface with low power gate trigger circuits
- Logic IC control systems
- Microcontroller output switching
Scrs Procurement Notes
Verify the specific ordering suffix to confirm the packaging format. The '126' suffix indicates Ammopack Radial packing, which differs from bulk pack options. Confirm RoHS compliance status and lead-free plating requirements against the latest manufacturer documentation before finalizing procurement specifications.
Scrs Selection Notes
Select this component when a compact through-hole SCR with low gate trigger current is required for logic-level control. Ensure the application voltage does not exceed the 600 V rating and that the RMS current load remains within the 800 mA limit. Consider thermal management for the TO-92 package if operating near maximum temperature limits.
Scrs Part Context
This part belongs to the BT149G family of sensitive gate SCRs. It is designed for general-purpose switching where small control signals must manage higher power loads. The TO-92 package provides a cost-effective solution for low-current applications compared to larger power packages.
Scrs Replacement Considerations
Check for equivalent parts with matching 600 V ratings and similar gate sensitivity. Verify pinout compatibility for TO-92 packages. Ensure substitute components meet the same industrial qualification standards and thermal characteristics.
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