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MR Electronics. Any Brand of LCD LED, OLED, QLED, Smart, Android, 4K / 8K UHD TV, Parts Sales & Electronics Equipment Repair Service center. Technician: Mamun.
(1)

Address: Buti Babur Mor - Lily mor road, Bank Asia - Opposite Second Floor, Dinajpur Sadar.

01/06/2026

Power Transistors Reference Guide –

This infographic presents several popular NPN and PNP Power BJT (Bipolar Junction Transistor) devices commonly used in power electronics, audio amplifiers, motor drivers, and switching circuits.

1. TIP122 (NPN Darlington)

Type: NPN Darlington Transistor

Maximum Collector Current (IC): 5A

Collector-Emitter Voltage (VCEO): 100V

Power Dissipation: 65W

Package: TO-220

Applications:

Relay Drivers

DC Motor Control

LED Drivers

Power Switching Circuits

2. TIP127 (PNP Darlington)

Type: PNP Darlington Transistor

Maximum Collector Current: 5A

VCEO: 100V

Power Dissipation: 65W

Package: TO-220

Applications:

Complementary Pair with TIP122

Audio Amplifiers

High-Side Switching

Power Control Circuits

3. 2SC5200 (NPN)

Type: High-Power Audio Transistor

Maximum Collector Current: 15A

VCEO: 230V

Power Dissipation: 150W

Package: TO-3P

Applications:

High-Fidelity Audio Amplifiers

Power Amplifier Output Stages

Industrial Power Supplies

Inverter Systems

4. 2SA1943 (PNP)

Type: Complementary Pair for 2SC5200

Maximum Collector Current: 15A

VCEO: 230V

Power Dissipation: 150W

Package: TO-3P

Applications:

Professional Audio Amplifiers

High-Power Sound Systems

Power Output Stages

5. MJ11032 (NPN Darlington)

Maximum Collector Current: 50A

VCEO: 120V

Power Dissipation: 300W

Package: TO-3 Metal Can

Applications:

Heavy-Duty Motor Drivers

Industrial Controllers

High-Current Power Supplies

Welding Equipment

6. MJ11033 (PNP Darlington)

Maximum Collector Current: 50A

VCEO: 120V

Power Dissipation: 300W

Package: TO-3 Metal Can

Applications:

Industrial Amplifiers

Servo Systems

High-Current Driver Circuits

Power Regulation Systems

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NPN vs PNP Transistors

Feature NPN PNP

Main Charge Carrier Electrons Holes
Current Flow Collector → Emitter Emitter → Collector
Base Trigger Positive Voltage Negative Voltage
Common Use Low-Side Switching High-Side Switching

Typical Applications

✅ Audio Amplifiers
✅ Motor Drivers
✅ Power Supplies
✅ Light Dimmers
✅ Solenoid Drivers
✅ Industrial Automation
✅ Inverters and UPS Systems

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01/06/2026

🏆 কেন MR Electronics বেছে নিবেন?

✅ অভিজ্ঞ Service Technician
• MD. Mamunur Rashid
• বছরের পর বছর অভিজ্ঞতা
• সকল Model এ দক্ষ

✅ সকল ব্র্যান্ড সার্ভিসিং
• Samsung, Sony, LG
• Walton, Vision, Singer
• আরও সব ব্র্যান্ড

✅ Original Parts Stock
• Quality Assured
• সব Parts পাওয়া যায়
• Replacement Guarantee

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• Same Day Service (সম্ভব হলে)
• কম সময়ে সমাধান

✅ সাশ্রয়ী মূল্য
• Fair Pricing
• No Hidden Cost
• Transparent Billing

✅ ওয়ারেন্টি সুবিধা
• Service Warranty
• Parts Warranty

📺 সার্ভিস করি:
LCD | LED | OLED | QLED
Smart TV | Android TV
4K & 8K UHD

MR Electronics - আপনার বিশ্বাসের ঠিকানা!

📞 01788188133
📍 Bank Asia - Opposite, Second Floor
Buti Babur Mor - Lily Mor Road, Dinajpur Sadar

#দিনাজপুরসেরা

31/05/2026

Capacitor Conversion Values & Marking Codes – Complete Guide

This infographic explains how to identify capacitor values, voltage ratings, and tolerance codes commonly found on ceramic, electrolytic, and film capacitors.

Key Information

1 pF (Picofarad) = 0.001 nF = 0.000001 μF

1 nF (Nanofarad) = 1,000 pF = 0.001 μF

1 μF (Microfarad) = 1,000 nF = 1,000,000 pF

Common Capacitor Codes

Code Value

101 100 pF
102 1,000 pF (1 nF)
103 10,000 pF (10 nF / 0.01 μF)
104 100,000 pF (100 nF / 0.1 μF)
105 1,000,000 pF (1 μF)
106 10 μF
107 100 μF

Example

103 Capacitor

First two digits = 10

Third digit = 3 zeros

Value = 10,000 pF = 10 nF = 0.01 μF

105 Capacitor

Value = 1,000,000 pF

= 1,000 nF

= 1 μF

Tolerance Codes

Code Tolerance

J ±5%
K ±10%
M ±20%
Z +80% / -20%
F ±1%
G ±2%

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31/05/2026

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MR Electronics - সব ব্র্যান্ডের বিশেষজ্ঞ!

👨‍🔧 MD. Mamunur Rashid
📞 01788188133

📍 Buti Babur Mor - Lily Mor Road
Bank Asia - Opposite, Second Floor
Dinajpur Sadar

#দিনাজপুর

30/05/2026

This infographic compares two popular general-purpose bipolar junction transistors (BJTs): C1815 (NPN) and A1015 (PNP). Both are widely used in low-power electronic circuits such as audio amplifiers, signal processing circuits, switching applications, and DIY electronics projects.

NPN Transistor – C1815

Type: NPN

Collector-Emitter Voltage (VCEO): 50V

Maximum Collector Current (IC): 150mA

Package: TO-92

Pinout (Front View): Emitter (E) – Collector (C) – Base (B)

Operation:
An NPN transistor turns ON when the base voltage is positive relative to the emitter. Current flows from the collector to the emitter when properly biased.

PNP Transistor – A1015

Type: PNP

Collector-Emitter Voltage (VCEO): 50V

Maximum Collector Current (IC): 150mA

Package: TO-92

Pinout (Front View): Emitter (E) – Collector (C) – Base (B)

Operation:
A PNP transistor turns ON when the base voltage is negative relative to the emitter. Current flows from the emitter to the collector when properly biased.

Key Differences

NPN: Activated by a positive base voltage.

PNP: Activated by a negative base voltage.

Both have similar electrical ratings but opposite current flow directions and biasing requirements.

Commonly used together in complementary amplifier and switching circuits.

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30/05/2026

একটু ঘোরাঘুরি

30/05/2026

🛒 TV Parts বিক্রয় হয় - Original Quality!

MR Electronics এ পাওয়া যাচ্ছে:

📦 Available Parts:
✅ LCD/LED/OLED/QLED Display Panel
✅ Main Board (Motherboard)
✅ Power Supply Board
✅ T-Con Board
✅ Backlight Strip/LED Bar
✅ Inverter Board
✅ LVDS Cable
✅ Remote Control
✅ Speakers & Accessories

💡 All Brand Parts Stock:
Samsung | Sony | LG | Walton | Vision | Singer | TCL | Hisense | Xiaomi এবং আরও

📺 Support For:
LCD, LED, OLED, QLED, Smart, Android, 4K/8K UHD TV

💯 Quality Assured
⚡ Stock Available
🔧 Free Installation Guidance

👨‍🔧 Service Technician:
MD. Mamunur Rashid

📞 যোগাযোগ: 01788188133

📍 Buti Babur Mor - Lily Mor Road
Bank Asia - Opposite, Second Floor
Dinajpur Sadar

#দিনাজপুর

30/05/2026

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✅ T-Con/Panel Replacement

সমস্যা ৩: চালু হচ্ছে না
✅ Power Board Repair

সমস্যা ৪: সাউন্ড আছে, ছবি নেই
✅ Display/Inverter Service

সমস্যা ৫: Smart Feature কাজ করছে না
✅ Motherboard/Software Fix

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✅ Panel/Main Board Service

📺 সকল Model সার্ভিসিং:
LCD | LED | OLED | QLED | Smart TV | 4K/8K UHD

⚠️ নিজে মেরামত করবেন না - বিশেষজ্ঞের সাহায্য নিন!

MR Electronics
দিনাজপুরের সেরা TV সার্ভিস সেন্টার

👨‍🔧 MD. Mamunur Rashid
📞 01788188133

📍 Buti Babur Mor - Lily Mor Road
Bank Asia - Opposite, Second Floor
Dinajpur Sadar

#টিভিসমস্যা #দিনাজপুরসার্ভিস

30/05/2026

100V CBB Capacitors – Complete Guide for Electronics Enthusiasts

CBB capacitors are polypropylene film capacitors known for their excellent stability, low loss, high insulation resistance, and long operational life. These capacitors are commonly used in power supplies, audio amplifiers, filtering circuits, timing circuits, snubber networks, and high-frequency electronic applications.

What Does the Capacitor Code Mean?

Most CBB capacitors use a three-digit code:

First two digits = significant figures

Third digit = number of zeros in pF (picofarads)

Common Values

Code Capacitance

103J 10nF (0.01µF)
223J 22nF (0.022µF)
333J 33nF (0.033µF)
393J 39nF (0.039µF)
473J 47nF (0.047µF)
104J 100nF (0.1µF)
224J 220nF (0.22µF)
334J 330nF (0.33µF)
474J 470nF (0.47µF)

Meaning of "J"

The letter J indicates the capacitor tolerance:

J = ±5%

K = ±10%

M = ±20%

Key Features

✅ Low ESR (Equivalent Series Resistance)
✅ High-frequency performance
✅ Excellent temperature stability
✅ Self-healing dielectric properties
✅ Long service life
✅ Non-polarized design (can be connected either way)

Common Applications

Audio amplifier circuits

Power supply filtering

Oscillator circuits

Motor control circuits

EMI suppression networks

Signal coupling and decoupling

DIY electronics projects

Advantages Over Ceramic Capacitors

Better stability over temperature

Lower signal distortion

Higher reliability in audio circuits

Longer lifespan in demanding applications

Important Note

The image states 100V, meaning these capacitors are designed for circuits where the operating voltage does not exceed 100 volts. For higher-voltage applications, choose capacitors with a higher voltage rating.

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