0805 220K 0.25W Chip Resistor High Power Thick Film SMD Resistor with ±1% Tolerance

CRH0805F220KP05Z — 0805 220K 0.25W EVER OHMS Chip Resistor
Fitting 1/4W and 1% tolerance onto a 2.0 × 1.25mm 0805 land is not something a standard thick film part handles comfortably. The EVER OHMS CRH family answers with CRH0805F220KP05Z, a 0805 220K 0.25W EVER OHMS chip resistor that raises the same footprint from 0.125W to 0.25W while keeping ±1% tolerance and ±100ppm/℃ TCR. The sections below cover the part code, electrical parameters, power and voltage limits, reliability data, applications and authorized supply.

Part code breakdown

CRH marks the high-power thick film series, rated above the standard CR line. 0805 is the imperial case size (metric 2012), roughly 2.0±0.2 × 1.25±0.15 × 0.50±0.15 mm. F is ±1% tolerance, with D (±0.5%) and J (±5%) in the same family. 220K is the 220kΩ E24 nominal value. P05 sets 0.25W (1/4W) referenced to 70°C ambient. Z is the lead-free environmental suffix, shipped on paper tape and reel, RoHS and REACH compliant.

Write the full part number on the BOM. CRH0805F220KP05Z, CRH0805D220KP05Z and CRH0805J220KP05Z are three separate materials, and "0805 220K 1/4W" alone invites the wrong tolerance grade; the P05Z versus P05S difference concerns taping direction and pack quantity, so confirm with the manufacturer before substituting.

Electrical parameters

220kΩ at ±1%; 0.25W at 70°C with linear derating to zero load at 155°C; TCR ±100ppm/℃ over the 10Ω–1MΩ range; 150V maximum working voltage and 300V overload rating; −55°C to +155°C operating range; insulation resistance ≥10GΩ at 100V for one minute; nickel barrier with lead-free matte tin termination, lead-free and halogen-free; ruthenium thick film paste screen printed on ceramic, fired at high temperature and laser trimmed; paper tape and reel, 5000 pcs per reel.

Voltage, not power, is the binding constraint at 220kΩ

With RCWV = √(P×R), 220kΩ at 0.25W corresponds to about 234V, already above the 150V maximum working voltage. This 0805 220K 0.25W EVER OHMS resistor therefore reaches its voltage ceiling first in steady state: at 150V the dissipation is roughly 0.10W, about 40% of the rating, with around 0.68mA of loop current. Two consequences follow. High-voltage dividers, startup resistors and bleed resistors should be checked against the 150V rating and pulse energy rather than against unused power headroom; and where power-on surge, hot-plug or motor-start transients exist, the single-pulse and repetitive-pulse curves in the datasheet must be verified separately instead of extrapolating from steady-state power.

On drift, 220kΩ at 100ppm/℃ means about 22Ω per degree Celsius, so a 100°C rise gives roughly 2.2kΩ, close to 1% of nominal — acceptable for divider ratios, threshold setting and pull networks, while precision sensing or reference dividers should move to the EVER OHMS thin film precision series (TR / VTR) for lower TCR.

Reliability conditions (per the CRH series specification)

Short-time overload at 2.5× RCWV or the maximum overload voltage, whichever is lower, for 2 seconds, ΔR ≤ ±(1.0%+0.05Ω); load life at 70±2°C for 1000 hours on a 1.5h-on/0.5h-off cycle, ΔR ≤ ±(1.0%+0.05Ω); resistance to soldering heat at 260±5°C for 10 seconds, ΔR ≤ ±(0.5%+0.05Ω); damp heat at 40±2°C and 90–95%RH for 1000 hours; rapid temperature change over −55°C to +155°C for five cycles, ΔR ≤ ±(0.5%+0.05Ω).

High-value resistors are more sensitive to surface leakage from moisture, so conformal coating or potting is advisable in humid, condensing or outdoor conditions, with post-damp-heat drift included in the divider error budget. Whether the rated power is actually reachable depends heavily on land copper area and via conduction, so enlarge the copper at both ends near the limit and keep the part away from transformers, power MOSFETs and inductors.

Applications and substitution

Typical placements include AC-DC and DC-DC feedback dividers, high-side startup and bleed resistors, RC snubbers, MCU sampling dividers and pull networks, LED driver current limiting, industrial IO and instrument signal conditioning, and auxiliary circuits in chargers and adapters.

CRH is a general-purpose high-power thick film line: AEC-Q200 projects should use the EVER OHMS automotive series, and sulfur-rich or polluted environments call for an anti-sulfur grade rather than CRH. Across brands, verify package, power rating basis, TCR and maximum working voltage together — substituting on "0805 220K" alone is a frequent source of BOM errors.

Authorized supply

Shenzhen Shunhai Technology Co., Ltd. (深圳市顺海科技有限公司) is the first-tier authorized distributor for EVER OHMS in mainland China, continuously authorized since 2017 and holding the 2026 distribution certificate (No. TWD202601E0000122). Its scope covers the full EVER OHMS thick film and thin film chip resistor range plus metal plate and metal film current sensing resistors, with stock on hand, low minimum orders for prototyping, and FAE support for cross-reference, derating calculation and land-pattern thermal design — suited to volume production and long-term supply assurance.

Huanian Mall (华年商城, hnstshop.com) is the self-operated online procurement platform under Shunhai Technology, where CRH0805F220KP05Z stock, tiered pricing and datasheets can be checked online, with self-service ordering and after-sales follow-up — well matched to R&D sampling, urgent replenishment and multi-part BOM sourcing.

Both channels sit inside the EVER OHMS authorized system with traceable factory origin: use Huanian Mall for fast sampling during development, and Shunhai Technology for payment terms and volume pricing in production.