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Explore how the CHR0805-1 47R SMD resistor compares to other types in specs, applications, and local SA availability. Get practical tips for projects and component selection.
Small, precise SMD resistor widely used in compact electronic circuits in South Africa.
Understand the trade-offs between SMD, through-hole, carbon film, and metal film resistors.
Find and compare resistor types, sizes, and brands in stock at Communica branches.
The CHR0805-1 47R is a 47 Ohm surface-mount (SMD) resistor in the 0805 package size, designed for automated PCB assembly in modern electronics. It is a popular choice among South African students, hobbyists, and professional engineers for both prototyping and production due to its compact size, reliability, and availability at component suppliers like Communica.
Choosing the right resistor type is essential for ensuring circuit reliability, ease of assembly, and cost-effectiveness. Surface-mount resistors like the CHR0805-1 47R offer benefits in size and automation, whereas through-hole resistors may be preferred in certain prototyping or high-power scenarios.
| Resistor Type | Package/Size | Technology | Typical Tolerance | Power Rating |
|---|---|---|---|---|
| CHR0805-1 47R | 0805 (SMD) | Thick Film | 1% or 5% | ~125mW (0.125W) |
| Carbon Film (Axial) | Through-hole | Carbon Film | 5% | 0.25W, 0.5W, 1W |
| Metal Film (Axial) | Through-hole | Metal Film | 1% or better | 0.25W, 0.5W, 1 W |
South African developers should check the resistor's rated voltage, maximum power dissipation, and temperature coefficient when specifying parts for new designs. For 47R values, the CHR0805-1 SMD style is most appropriate for low- to moderate-current signal lines and pull-down/up applications, while metal film is a go-to for precision analog.
To avoid overheating, always ensure the CHR0805-1 47R is used within its rated limits. Use Ohm's Law for verification:
Example:
Suppose you have 5V across the resistor.
Current: I = V / R = 5V / 47Ohm ~ 0.106 A (106 mA)
Power dissipated: P = V x I = 5V x 0.106 A ~ 0.53 W
| Scenario | Best Choice | Why |
|---|---|---|
| Compact, automated boards | CHR0805-1 47R SMD | Minimal space, machine placement |
| Breadboarding, student kits | Axial (Metal/Carbon Film) | Easy to handle, plug into breadboards |
| High power dissipation (>0.25W) | Wirewound or higher-watt axial | Greater thermal margin |
| Precision analog circuits | Metal Film (axial or SMD) | Low noise, tight tolerance |
Free shipping for orders over ZAR 1,000.00.
Get a full refund if you had the product for less than 7 days.
Nationwide delivery within 2 - 4 working days.
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