Bourns Introduces CRT-G Series Precision Thin Film Chip Resistors for Low-Drift Measurement Circuits

Bourns today announced the Bourns® CRT-G Series General-Purpose Precision Thin Film Chip Resistors for circuits that require accurate resistance values, low temperature drift, and stable long-term performance. Available in package sizes from 01005 through 2512, the series provides resistance tolerances as tight as ±0.01 % and temperature coefficient of resistance (TCR) options as low as ±2 ppm/°C, depending on package size and resistance value.

Precision measurement, signal conditioning, and control circuits can accumulate error through initial resistance variation, temperature-related drift, and changes over operating life. These effects are particularly important when resistor accuracy directly influences sensing, calibration, or analog circuit performance. The CRT-G Series combines thin film construction, multiple tolerance and TCR options, resistance values from 2.49 Ω to 3.3 MΩ, and operation from -55 °C to +155 °C, allowing designers to select the required balance of resistance value, tolerance, TCR, power rating, and package size.

"Precision measurement, signal conditioning, and control circuits can accumulate error through initial resistance variation, temperature-related drift, and changes over operating life. These effects are particularly important when resistor accuracy directly influences sensing, calibration, or analog circuit performance. The CRT-G Series combines thin film construction, multiple tolerance and TCR options, resistance values from 2.49 Ω to 3.3 MΩ, and operation from -55 °C to +155 °C, allowing designers to select the required balance of resistance value, tolerance, TCR, power rating, and package size."
— Walter Garcia, Product Line Manager, Resistors, Bourns

Design Features

• Ultra-tight tolerance — Resistance tolerance down to ±0.01 % supports precision circuits in which initial resistance variation affects measurement accuracy
• Low temperature coefficient — TCR options of ±2, ±3, ±5, ±10, ±15, ±25, and ±50 ppm/°C help limit resistance changes as operating temperature varies
• Wide resistance range — Values from 2.49 Ω to 3.3 MΩ support component selection across a range of precision circuit requirements
• Multiple package sizes — Nine package options from 01005 through 2512 support miniature layouts and designs requiring higher power ratings
• Wide operating temperature range — Operation from -55 °C to +155 °C supports designs exposed to broad ambient temperature variation
• Multiple power ratings — Ratings from 0.031 W to 0.75 W at 70 °C provide selection flexibility across the available package sizes
• Environmental compliance — RoHS compliant*, halogen free**, and lead free, with tin-plated terminations
• Moisture Sensitivity Level 1 — Supports standard handling and assembly processes for surface-mount components

Electrical Specifications

Parameter	CRT-G Series
Package sizes	01005, 0201, 0402, 0603, 0805, 1206, 1210, 2010, 2512
Power rating at 70 °C (W)	0.031-0.75
Operating temperature range (°C)	-55 to +155
Maximum working voltage (V)	15-200
Maximum overload voltage (V)	30-400
Resistance range	2.49 Ω to 3.3 MΩ
Resistance tolerance (%)	±0.01, ±0.05, ±0.1, ±0.25, ±0.5, ±1
TCR (ppm/°C)	±2, ±3, ±5, ±10, ±15, ±25, ±50
Moisture Sensitivity Level	1

Available resistance, tolerance, and TCR combinations vary by package size and resistance value.

Target Applications

• Current sense — Supports accurate resistance values in circuits that measure current
• Precision circuits — Helps control resistance-related error in measurement and analog signal paths
• Medical equipment† — Supports non-life-critical equipment requiring stable and repeatable resistance values
• Printers — Provides precision resistance options for sensing and control circuitry
• Automation equipment — Supports measurement and control functions where low temperature drift is required
• Navigation equipment — Supports precision circuitry requiring stable resistance characteristics over temperature

Availability

The Bourns® CRT-G Series General-Purpose Precision Thin Film Chip Resistors is available now through Bourns authorized distribution partners. Product details, inventory information and sample requests are available at bourns.com/products/resistors/thin-film-chip-resistors. Engineers may also contact Bourns Customer Service or Inside Sales for application support and ordering information.