4. Replace Through-Hole with SMD Resistor

1. Reading the Resistor Color Code 
The highlighted resistor on the board shows the following color bands: 
Band 
Color 
Value 
Band 1 
Brown 
1 
Band 2 
Black 
0 
Band 3 (Multiplier) 
Orange 
×1,000 
Band 4 (Tolerance) 
Gold 
±5% 
Calculation: 10 × 1,000 = 10,000Ω = 10kΩ, ±5% 
This is a standard ¼W through-hole resistor. For the SMD retrofit, we need a resistor that matches these specs: 
10kΩ · ±5% or better · ≥0.25W · 1206 package · Thick Film · SMD · −55°C to +125°C · RoHS compliant 
2. How to Find It on DigiKey 
Go to DigiKey.com → Resistors → Chip Resistor - Surface Mount 
Apply these filters in the left panel: 
Resistance → 10 kOhms 
Tolerance → ±5% (±1% is also acceptable — tighter is always fine) 
Power (Watts) → 0.25W (same as 1/4W) 
Composition → Thick Film 
Package / Case → 1206 (3216 Metric) 
Operating Temperature → −55°C to +125°C 
Part Status → Active 
3. Key Specifications & What They Mean 
Specification 
Required 
Why 
Resistance 
10kΩ 
Must match original value exactly. 
Tolerance 
±5% or better 
Gold band = ±5%. Tighter is acceptable. 
Power Rating 
≥0.25W 
Matches original ¼W rating. 
Type 
Thick Film 
Standard, cost-effective for general use. 
Package 
1206 
Handles 0.25W; easy to rework. 
Mounting 
Surface Mount 
SMD retrofit requirement. 
Temp Range 
−55°C to +125°C 
Standard industrial operating range. 
RoHS 
Yes 
Compliance required. 
4. Selecting a Safe, Production-Ready Part 
The filtered list will show many matching parts. Before you pick one, check: Is the part Active (not obsolete)? Is stock available? Is the manufacturer reputable? Is a datasheet available? 
Full checklist: 📄 How to Select a Safe, Production-Ready Component — EWskills Guide 
5. Filtered DigiKey Link 
👉 View Matching Parts on DigiKey — 10kΩ, 1206, ±5%, Thick Film, 0.25W

Band	Color	Value
Band 1	Brown	1
Band 2	Black	0
Band 3 (Multiplier)	Orange	×1,000
Band 4 (Tolerance)	Gold	±5%

Specification	Required	Why
Resistance	10kΩ	Must match original value exactly.
Tolerance	±5% or better	Gold band = ±5%. Tighter is acceptable.
Power Rating	≥0.25W	Matches original ¼W rating.
Type	Thick Film	Standard, cost-effective for general use.
Package	1206	Handles 0.25W; easy to rework.
Mounting	Surface Mount	SMD retrofit requirement.
Temp Range	−55°C to +125°C	Standard industrial operating range.
RoHS	Yes	Compliance required.

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