220 Ω Resistor 0402 - Bourns CR0402-FX-2200GLF

@@ -12,13 +12,14 @@ | Max working voltage 50 V; max overload voltage 100 V | p.1 | | TCR ±100 ppm/°C, the ±1 % 10 Ω ≤ R ≤ 1 MΩ band covers this value | p.1 | | Operating temperature −55 to +155 °C; Moisture Sensitivity Level 1 | p.1 |-| Rated current 1 A; max overload current 2.5 A | p.1 | | Short-time overload (2.5× rated voltage, 5 s): ΔR within ±(2 % + 0.1 Ω); dielectric withstanding voltage 300 V | p.4 | | No top marking in the 0402 size; tin-plated terminations, RoHS compliant (LF) | p.6, p.5 | | Paper tape, 2 mm pitch, 10,000 pcs on a 7-inch (178 mm) reel, packaging code G | p.5, p.7, p.8 |  ## Notes for designers +The datasheet’s 1 A current rating applies to the **zero-ohm jumper**, not this 220 Ω resistor. For this value, enforce both power and voltage limits: at 70 °C the nominal 62.5 mW power bound is about 16.9 mA or 3.71 V, before resistance tolerance and design margin. Reduce allowable power above 70 °C. [Bourns CR-series datasheet, electrical characteristics](https://www.bourns.com/docs/product-datasheets/cr.pdf).+ CR0402-FX-2200GLF is the 220 Ω member of Bourns’ CR series of general-purpose thick film chip resistors, in the 0402 size, a 1.00 × 0.50 mm body just 0.32 mm thick, built on a three-layer termination with a nickel barrier under the tin plating. (p.2, p.1) Tolerance is ±1 %, and like every CR0402 the top carries no marking, the value travels in the ordering code (2200 → 220 Ω, 3 significant digits + 0 zeros), not on the part. (p.1, p.5, p.6)  Design against 1/16 W at 70 °C ambient, the rating derates linearly above that and reaches zero at +155 °C (p.1, p.3), and keep continuous voltage at or below 50 V; the 100 V figure is an overload limit, not a working one. (p.1) TCR is ±100 ppm/°C across the 10 Ω-1 MΩ ±1 % band this value sits in. (p.1) A 2.5× rated-voltage, 5-second overload is allowed to shift the value by up to ±(2 % + 0.1 Ω), worth knowing if a transient can land across it. (p.4)