Reference resistor: Resistance Range 0.1Ω to 10kΩ

Component Specifications

Definition

A reference resistor is a high-precision, low-temperature-coefficient resistor used in current source cells to establish a stable voltage drop that determines the output current. It serves as the primary accuracy-determining element in precision current sources by providing a known resistance value with minimal drift over time and temperature variations.

Working Principle

Operates based on Ohm's Law (V=IR) where a precise voltage applied across the reference resistor generates a corresponding current. The resistor's stable resistance value ensures consistent current output regardless of load variations or environmental changes.

Materials

Thin-film metal alloy (nickel-chromium or tantalum nitride) on ceramic substrate, gold-plated copper terminals, epoxy encapsulation

Technical Parameters

Parameter	Typical range	Notes & selection driver
Stability	±25ppm/year
Tolerance	±0.01% to ±0.1%
Power Rating	0.1W to 1W
Resistance Range	0.1Ω to 10kΩ
Operating Temperature	-55°C to +125°C
Temperature Coefficient	±1ppm/°C to ±10ppm/°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

IEC 60115, MIL-PRF-914, ASTM B809

Parent Products

This component is used in the following industrial products

Current source cell

A fundamental electronic component that generates and regulates a constant current output within a resistor network or current source array.

View Product Details

Engineering Analysis

Risks & Mitigation

Resistance drift over time
Thermal runaway at high currents
Contamination from environmental exposure
Mechanical stress damage
Solder joint degradation

FMEA Triads

Trigger: Overheating due to excessive current
Failure: Resistance value permanent shift
Mitigation: Implement current limiting circuits and thermal monitoring

Trigger: Moisture ingress
Failure: Corrosion and resistance instability
Mitigation: Use hermetic sealing and conformal coatings

Trigger: Mechanical vibration
Failure: Internal connection failure
Mitigation: Secure mounting with vibration dampeners

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.01% to ±0.1% per IEC 60115-8

Test Method

Four-wire Kelvin measurement at controlled temperature (23±1°C) after 24-hour stabilization

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Reference resistor

Manufacturer profiles associated with Reference resistor.

Sourcing Reference resistor from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

Related Components

Marking Strip

A durable marking strip used for terminal identification in motor terminal blocks to ensure proper electrical connections and safety compliance.

Gland Body

A gland body is the main housing component of an aluminum cable gland that provides mechanical protection and environmental sealing for electrical cables entering enclosures.

Current Sense Resistor

A precision resistor used to measure current flow in electrical circuits by converting current to a measurable voltage drop.

Conductor Terminal

A conductor terminal is a critical electrical component designed to securely connect and terminate conductors in high-voltage insulating bushings, ensuring reliable electrical transmission and insulation integrity.

Frequently Asked Questions

What makes a reference resistor different from standard resistors?

Reference resistors feature ultra-low temperature coefficients (±1-10ppm/°C vs ±100-200ppm/°C for standard), tighter tolerances (0.01-0.1% vs 1-5%), and superior long-term stability (25ppm/year vs 1000ppm/year).

How does temperature affect reference resistor performance?

High-quality reference resistors use materials with minimal resistance change versus temperature (low TCR). Temperature-controlled environments or compensation circuits further minimize thermal effects on current source accuracy.

What maintenance do reference resistors require?

Reference resistors require periodic calibration (typically annually), protection from mechanical stress, and operation within specified temperature/power limits to maintain specified accuracy.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Reference resistor