PCF0805R-1K65BI WELWYN Resistor (Resistor Chip) In Stock
PCF0805R-1K65BI is a WELWYN thin film chip resistor with 1.65 kΩ resistance, ±0.1% tolerance, and 0.1 W power rating in an 0805 SMD package. It delivers precision resistance stability with low temperature coefficient for demanding analog and measurement circuit applications. In stock with worldwide shipping for high-accuracy signal conditioning and bridge circuit procurement.
- Manufacturer
- WELWYN
- Package
- Resistor Chip
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- PCF0805R-1K65BI Datasheet PDF
- Category
- Resistor
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 1.65 kΩ thin film resistor with ±0.1% tolerance enables precision voltage dividers, bridge circuits, and gain-setting networks
- 0.1 W rated power in 0805 package balances compact footprint with adequate thermal dissipation for signal-level applications
- Thin film construction provides low TCR (typically ±25 ppm/°C) for stable resistance across wide temperature operating ranges
Applications
The WELWYN PCF0805R-1K65BI is used in precision analog front-end circuits, instrumentation amplifier gain networks, and Wheatstone bridge configurations where resistance accuracy to ±0.1% is required. Its 1.65 kΩ value and thin film stability make it suitable for current sense dividers, ADC reference voltage scaling, and sensor interface circuits in medical devices and industrial measurement equipment. The 0805 SMD package is compatible with standard automated reflow soldering processes in high-volume production.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the ±0.1% tolerance of PCF0805R-1K65BI affect accuracy in a precision voltage divider application?
With ±0.1% tolerance, the PCF0805R-1K65BI introduces a maximum resistance error of ±1.65 Ω on the nominal 1.65 kΩ value. In a voltage divider driving a 12-bit ADC with a 3.3 V reference, this tolerance translates to a maximum output voltage error of approximately ±0.3 mV, equivalent to less than 0.4 LSB at full scale, making the PCF0805R-1K65BI suitable for high-accuracy signal conditioning without requiring trimming.
What temperature coefficient does thin film construction provide in PCF0805R-1K65BI and why does it matter for industrial designs?
Thin film resistors like the PCF0805R-1K65BI typically achieve a temperature coefficient of resistance (TCR) of ±25 ppm/°C or better, compared to ±100 ppm/°C or more for thick film alternatives. Across an industrial operating range of -40°C to 85°C (a 125°C span), the maximum resistance drift is approximately ±0.3%, which is critical in precision bridge circuits or gain-setting networks where resistance drift directly causes measurement error or amplifier gain shift.
Can PCF0805R-1K65BI handle the power dissipation requirements of a 5 V signal conditioning network?
The PCF0805R-1K65BI is rated at 0.1 W in the 0805 package. At 5 V applied across 1.65 kΩ, the power dissipated is approximately 15 mW, which is well within the 100 mW rating and leaves an 85% safety margin. Even in a circuit where multiple resistors share a common rail, the 0805 package provides sufficient thermal mass to prevent overheating in ambient temperatures up to 70°C without derating.
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About WELWYN
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