BT149B The BT149B is a silicon controlled rectifier (SCR) from Philips with 0.8A RMS on-state current and 200V off-state voltage, housed in a TO-92 package.
Mfr Part #:

BT149B

Available from 1 distributors
Mfr Name: Philips
Philips
The BT149B is a silicon controlled rectifier (SCR) from Philips with 0.8A RMS on-state current and 200V off-state voltage, housed in a TO-92 package.
✓ Total Stock: 40 pcs
$ Price Range: $1.27

BT149B Available from 1 distributor

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Non-Authorised Inventory information
40 pcs
40 pcs On Request 1 On Request On Request On Request On Request On Request

BT149B Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Lead Style
Number of Elements
SVHC Present

BT149B Description

Short technical summary and product information.

The BT149B is a silicon controlled rectifier (SCR) manufactured by Philips. It is designed for general-purpose switching and control applications requiring a single-element thyristor. The device features a nominal on-state RMS current rating of 0.8A and an off-state voltage rating of 200V. The trigger current is specified at 0.5mA, enabling reliable gate activation. The breakdown voltage is also rated at 200V. The BT149B is packaged in a standard TO-92 through-hole package with 3 terminals. It operates over a temperature range up to 125°C. This SCR is suitable for low-power phase control, motor speed control, and lighting dimmer circuits where a compact, cost-effective thyristor is required.

BT149B Quick Information

Product Type: Silicon Controlled Rectifier
Series: BT149
Canonical Name: BT149B Silicon Controlled Rectifier
Subcategory: Thyristor

BT149B Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

BT149B Estimated Pricing

Qty Low High
1+ $1.27 $1.27

Estimated market price range - modelled values for guidance only, not live distributor offers.

BT149B Features

  • 0.8A RMS on-state current rating.
  • 200V off-state and breakdown voltage.
  • 0.5mA gate trigger current.
  • TO-92 through-hole package.
  • 125°C maximum operating temperature.

BT149B Applications

  • Interfaced directly to microcontrollers
  • Used in low power gate trigger circuits
  • Suitable for logic integrated circuits
  • Ideal for RCD/GFI/LCCB applications

BT149B FAQs

5 frequently asked questions generated from this part’s specifications.
What is the on-state RMS current of the BT149B?

0.8 A.

What is the off-state voltage rating?

200 V.

What is the trigger current required?

0.5 mA.

What package does the BT149B come in?

TO-92.

What is the maximum operating temperature?

125 °C.

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