RT0805WRD072KL - 2kΩ 0.05% 1/8W Thin Film Chip Resistor | YAGEO
部品番号: RT0805WRD072KL ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0.42 | $0.42 |
| 10 | $0.38 | $3.80 |
| 100 | $0.31 | $31.00 |
| 500 | $0.26 | $130.00 |
| 1,000 | $0.22 | $220.00 |
| 5,000 | $0.18 | $900.00 |
RT0805WRD072KL 概要
A chip resistor is a passive two-terminal component that provides a defined value of electrical resistance in a surface-mount package. The 0805 imperial code designates a 2.0 mm x 1.25 mm land pattern, while the "2012 metric" notation refers to the same dimensions in metric (2.0 mm x 1.25 mm). Within the broader taxonomy, this part is a thin-film chip resistor, a sub-category of fixed resistors, which themselves belong to the passive component family used in nearly every electronic circuit for current limiting, voltage division, biasing, and signal conditioning.
Key features include ±0.05% resistance tolerance (significantly tighter than standard 1% or 5% thick-film chip resistors), 25 ppm/°C nominal TCR for stable performance across temperature, 1/8 W rated power at 70°C, and compliance with lead-free reflow profiles up to 260°C peak. The thin-film nichrome resistive element sputtered onto a ceramic alumina substrate delivers lower noise (-40 dB typical) and better high-frequency characteristics than thick-film equivalents. The end terminations are wrap-around Ni-barrier with matte-tin plating for excellent solderability and leach resistance during multiple reflow cycles.
Technically, the thin-film sputtering process produces a uniform resistive layer whose cross-section and composition can be laser-trimmed to within ±0.05% of the target value. This precision enables the resistor to be used as a reference element in measurement-grade signal chains. The 0805 package supports standard pick-and-place assembly, and the part is qualified against industry reliability standards including AEC-Q200 (for the qualified grade).
Typical applications include precision analog front-ends, instrumentation amplifier gain-setting networks, precision voltage dividers in ADCs and DACs, bridge excitation circuits in load cells and pressure sensors, test and measurement equipment, and medical instrumentation. Designers also select this tolerance class for feedback networks in switching regulators where resistor mismatch directly affects output accuracy.
When designing with the RT0805WRD072KL, observe derating guidelines above 70°C ambient: power dissipation must be linearly reduced to zero at 155°C. For precision divider networks, pair two resistors of the same lot to minimize ratio drift. This page consolidates distributor pricing, drop-in alternatives, and application engineering notes beyond what the YAGEO datasheet alone provides.
ドロップイン代替品: RT0805WRD072KL — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
RT0805BRD072KL
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
RT0805DRE072KL
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
RT0805CRE072KL
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MCAT0805-2002-D-25
✅ ドロップイン📋 参考代替品（カタログ未掲載）
RNCP0805FTD2K00
✅ ドロップイン📋 参考代替品（カタログ未掲載）
RT0805WRD072KL 最大定格＆電気的特性
| Manufacturer | YAGEO |
| Series | RT (Thin Film Chip Resistor) |
| Resistance | 2 kΩ (2000 Ω) |
| Resistance Tolerance | ±0.05% |
| Power Rating | 0.125 W (1/8 W) at 70°C |
| Temperature Coefficient (TCR) | 25 ppm/°C (nominal, RT-series) |
| パッケージ / ケース | 0805 (2012 Metric) |
| Dimensions | 2.0 mm x 1.25 mm x 0.55 mm |
| Resistor Technology | Thin Film (NiCr on alumina) |
| 動作温度 | -55°C to +155°C |
| Rated Working Voltage | 150 V (max) |
| Termination Style | SMD/SMT - Wrap-around Ni barrier with matte Sn plating |
| 実装タイプ | Surface Mount |
| Packaging | Tape & Reel (paper carrier, 7" reel) |
| Standard Reel Quantity | 5000 pcs |
| RoHS ステータス | Compliant (lead-free) |
| REACH Status | Compliant |
| ハロゲンフリー | Yes (per YAGEO datasheet) |
| AEC-Q200 | Qualified (RT series is automotive grade) |
| MSLレベル | MSL 1 (unlimited floor life at <30°C/85% RH) |
RT0805WRD072KL 0805 (2012 metric) ピン配置ガイド
RT0805WRD072KL (0805 (2012 metric) パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: RT0805WRD072KL.
詳細は データシート をご参照ください。
主な用途
RT0805WRD072KL の用途: 6 件s: Precision Instrumentation Amplifier Gain Networks, ADC/DAC Reference Voltage Dividers, Bridge Sensor Excitation Circuits, Test and Measurement Equipment, Medical Diagnostic Equipment, Switching Regulator Feedback Networks.
Precision Instrumentation Amplifier Gain Networks
The RT0805WRD072KL's ±0.05% tolerance and 25 ppm/°C TCR make it an ideal gain-setting resistor for instrumentation amplifiers (such as INA128, AD620) used in medical and industrial signal acquisition. When paired with a matched second thin-film resistor from the same reel, the resistor ratio determines the differential gain; tight initial tolerance reduces gain calibration time, while low TCR preserves gain accuracy over the -40°C to +85°C industrial range. Its 0.125 W rating easily handles the milliamp-level currents typical of gain networks, and the 2 kΩ value works well with common-mode bias currents. For best CMRR, designers select two RT-series resistors from adjacent positions on the reel to maximize ratio matching.
おすすめ
ADC/DAC Reference Voltage Dividers
The RT0805WRD072KL serves as a precision element in voltage divider networks that scale a 5 V or 10 V reference down to the full-scale input range of high-resolution ADCs (such as ADS1256, AD7190) and DACs. The ±0.05% tolerance minimizes initial offset error, while 25 ppm/°C TCR keeps the divider ratio stable across operating temperature. Because ADC reference accuracy directly limits conversion linearity, using thin-film resistors rather than 1% thick-film resistors measurably improves effective number of bits (ENOB) at 20-24 bit resolution. The 0805 SMD package allows placement adjacent to the reference pin with minimal trace resistance and inductance for low-noise settling.
おすすめ
Bridge Sensor Excitation Circuits
The RT0805WRD072KL is used as a half-bridge completion resistor in strain-gauge, load-cell, and pressure-sensor signal conditioning where the RT-series thin-film stability yields superior measurement repeatability. In a Wheatstone bridge, the four-臂 bridge formation acts as a ratio arm, and any resistance drift with temperature or aging directly translates to offset and gain errors in the measured force, weight, or pressure. By completing the bridge with a 2 kΩ thin-film resistor of matched TCR to the active gauge elements, system-level temperature drift is reduced by an order of magnitude versus thick-film completion resistors. AEC-Q200 qualification also supports automotive and heavy-industrial sensor deployments.
おすすめ
Test and Measurement Equipment
In laboratory instruments such as digital multimeters, source-measurement units, and benchtop calibrators, the RT0805WRD072KL appears in precision attenuator and current-sense networks where ±0.05% tolerance is required to maintain instrument accuracy class specifications (e.g., 0.05% DCV accuracy). The thin-film construction also exhibits low parasitic inductance and capacitance, preserving flat frequency response for AC voltage measurement circuits up to several hundred kilohertz. Engineers favor YAGEO's RT-series for metrology-grade instruments because the parts are traceable to NIST standards and the datasheet guarantees 0.05% tolerance as an absolute (not relative) figure across production lots.
おすすめ
Medical Diagnostic Equipment
Patient-connected diagnostic devices such as ECG front-ends, blood-glucose meters, and pulse-oximetry circuits use the RT0805WRD072KL in biopotential amplifier feedback networks and I-to-V converter gain stages. The 25 ppm/°C TCR ensures measurement stability across the 10°C to 40°C clinical temperature range, while low noise (-40 dB typical) prevents the resistor itself from degrading the signal-to-noise ratio of microvolt-level bioelectric signals. The 0805 SMD package supports miniaturized disposable and reusable medical device form factors. AEC-Q200 qualification is also a useful proxy for medical-grade reliability programs that reference automotive stress-test conditions.
おすすめ
Switching Regulator Feedback Networks
The RT0805WRD072KL forms the upper or lower resistor of a feedback divider in isolated and non-isolated DC-DC converters (such as LM2596, TPS5430) where output voltage accuracy depends on resistor ratio. ±0.05% initial tolerance cuts the worst-case output voltage error in half compared to a 1% design, often eliminating the need for a trim potentiometer. Combined with 25 ppm/°C TCR, the divider ratio remains stable across the converter's operating temperature range, improving load-line regulation. The 0.125 W rating suits feedback currents in the 1-10 mA range typical of TL431-based feedback loops and direct-feedback converter topologies.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: RT0805WRD072KL — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | RT0805BRD072KL | RT0805DRE072KL | MCAT0805-2002-D-25 | RNCP0805FTD2K00 |
|---|---|---|---|---|---|
| Brand | YAGEO | YAGEO | YAGEO | Vishay Intertechnology | Stackpole Electronics |
| Package | 0805 (2012 Metric) | 0805 (2012 Metric) - same | 0805 (2012 Metric) - same | 0805 (2012 Metric) - same | 0805 (2012 Metric) - same |
| Resistance | 2 kΩ | 2 kΩ | 2 kΩ | 2 kΩ | 2 kΩ |
| Tolerance | ±0.05% | ±0.1% | ±0.5% | ±0.5% | ±1% |
| Power Rating | 0.125 W | 0.125 W | 0.125 W | 0.125 W | 0.125 W |
| TCR | 25 ppm/°C | 25 ppm/°C | 25 ppm/°C | 25 ppm/°C | 100 ppm/°C |
| Technology | Thin Film | Thin Film | Thin Film | Thin Film | Thin Film (anti-sulfur) |
| Operating Temperature | -55°C to +155°C | -55°C to +155°C | -55°C to +155°C | -55°C to +155°C | -55°C to +155°C |
| AEC-Q200 | Qualified | Qualified | Qualified | Qualified | Qualified |
主な差別化要因
- Tightest available tolerance grade in the RT-series （vs RT0805BRD072KL (±0.1%))
- Lowest TCR in same-package 2 kΩ offering （vs RNCP0805FTD2K00 (Stackpole, ±1%, 100 ppm/°C thick-film))
- Thin-film low-noise technology （vs Generic thick-film 0805 2 kΩ ±1% resistors)
設計ノート
Power derating: at 70°C ambient the RT0805WRD072KL dissipates the full 0.125 W; above 70°C power must be linearly derated to zero at +155°C, equivalent to approximately 1.47 mW/°C derating slope. Estimated: with 2 kΩ at full 0.125 W (V=√PR ≈ 15.8 V) or with realistic 5 V bias across it (I=2.5 mA, P=0.0125 W), junction temperature rise over ambient is negligible due to the 0805 package's ~200°C/W θJA. Designers should still avoid placing precision resistors next to heat sources such as inductors or power MOSFETs because the absolute value tolerance (±0.05%) can be exceeded by thermal-gradient-induced drift.
Use the standard 0805 land pattern (per IPC-7351 nominal): 1.20 mm x 1.40 mm pads with 0.60 mm gap, finished with ENIG or OSP plating. Keep solder mask dams between adjacent pads to prevent bridging during reflow. For precision divider applications, place both resistors of the matched pair symmetrically around the divider node with identical trace lengths to minimize thermal-EMF and trace-resistance mismatch; this typically yields <0.01% ratio error from layout alone. Avoid running noisy digital or switching traces directly under or parallel to the precision resistor network to prevent capacitively-coupled noise injection.
Although the 0805 package exhibits small parasitic effects (~0.2 nH series inductance, ~0.1 pF parallel capacitance at 2 kΩ), the thin-film construction of the RT0805WRD072KL keeps voltage coefficient and current noise well below thick-film equivalents. For very low-level signals (<1 mV), avoid running the divider at less than 1 mA bias current to keep thermal (Johnson-Nyquist) noise below the system noise floor; at 2 kΩ and 1 mA bias, thermal noise at 1 kHz bandwidth is approximately 5.7 nV/√Hz. Estimated: Vnoise = √(4kTR·BW) with k=1.38e-23 J/K, T=300 K, R=2 kΩ, BW=1 kHz gives ≈5.7 nV/√Hz.
Do not substitute RT0805WRD072KL (W = ±0.05%) with RT0805FRE072KL (F = ±1%) in precision applications - the 20x tolerance difference will defeat the design intent. Similarly, do not use thick-film 0805 equivalents such as RC0805FR-072KL for instrumentation-amp gain networks, as their ±1% tolerance plus 100-200 ppm/°C TCR compounds gain error unacceptably. When sourcing via clip-socket or terminals on test leads, account for socket contact resistance; for sub-1% measurements use Kelvin (4-wire) connections or solder the resistor directly into the circuit. For AEC-Q100 automotive applications, verify that the specific lot/date code is supplied from YAGEO's automotive-qualified production line.
コンプライアンス情報
RT-series is AEC-Q200 qualified (automotive passive stress). RoHS and REACH compliance per YAGEO product declaration. Halogen-free per YAGEO datasheet. Note: this is a passive resistor, so AEC-Q100 (active IC) does not apply; AEC-Q200 (passive) is the relevant automotive standard.
