621MILFT

Basic Information Overview

• Category: Electronic Component
• Use: Signal Amplification
• Characteristics: High Gain, Low Noise
• Package: TO-92
• Essence: NPN Transistor
• Packaging/Quantity: Bulk, 1000 units per pack

Specifications and Parameters

• Collector Current (Ic): 100mA
• Collector-Emitter Voltage (Vceo): 30V
• Emitter-Base Voltage (Vbe): 5V
• Power Dissipation (Pd): 625mW
• Transition Frequency (ft): 300MHz
• Operating Temperature Range: -55°C to +150°C

Detailed and Complete Pin Configuration

1. Base (B)
2. Emitter (E)
3. Collector (C)

Functional Characteristics

• High current gain (hFE) of minimum 100
• Low noise figure for improved signal quality
• Suitable for small-signal amplification applications
• Fast switching speed for rapid signal processing

Advantages and Disadvantages

Advantages: - High gain allows for effective signal amplification - Low noise figure ensures minimal signal distortion - Small package size enables space-saving designs

Disadvantages: - Limited power handling capability - Restricted voltage and current ratings

Applicable Range of Products

• Audio amplifiers
• RF amplifiers
• Oscillators
• Switching circuits

Working Principles

The 621MILFT is an NPN transistor that operates as a current amplifier. When a small input current flows into the base terminal, it controls a larger current flow between the collector and emitter terminals. This amplification effect allows the transistor to boost weak signals.

Detailed Application Field Plans

1. Audio Amplification: The 621MILFT can be used in audio amplifiers to increase the volume of audio signals without introducing significant noise.

2. RF Amplification: In radio frequency (RF) circuits, the transistor can amplify weak RF signals for improved reception and transmission.

3. Oscillators: The high gain and fast switching speed of the 621MILFT make it suitable for use in oscillator circuits, generating stable oscillating signals.

4. Switching Circuits: Due to its fast switching characteristics, the transistor can be employed in switching circuits to control the flow of current or voltage.

Detailed Alternative Models

• 621MILFTX: Similar specifications but with extended temperature range (-65°C to +175°C)
• 621MILFTR: RoHS-compliant version with reduced environmental impact
• 621MILFTS: Smaller SOT-23 package variant for space-constrained applications

5 Common Technical Questions and Answers

1. Q: What is the maximum collector current of the 621MILFT? A: The maximum collector current is 100mA.

2. Q: Can the transistor handle high temperatures? A: Yes, it can operate within a wide temperature range from -55°C to +150°C.

3. Q: Is the 621MILFT suitable for audio amplification? A: Yes, it is commonly used in audio amplifiers due to its high gain and low noise figure.

4. Q: What is the typical transition frequency of the transistor? A: The typical transition frequency is 300MHz.

5. Q: How many units are included in each pack of the 621MILFT? A: Each pack contains 1000 units when purchased in bulk.

This encyclopedia entry provides an overview of the 621MILFT transistor, including its basic information, specifications, pin configuration, functional characteristics, advantages and disadvantages, applicable range of products, working principles, detailed application field plans, alternative models, and common technical questions and answers.