Is there a pin-compatible replacement for RS-03K681JT?

Yes, RS-03K6800FT and AC0603FR-07680RL are considered pin-compatible replacements. They share the same 0603 package, 680Ω resistance, and 0.1W power rating, allowing for a direct swap on the PCB.

What risks should I check before replacing RS-03K681JT?

Before replacing, check the Temperature Coefficient (TCR). Some alternatives may have a worse TCR (e.g., ±400ppm/℃ vs ±100ppm/℃), which can impact performance in temperature-sensitive circuits. Always verify this parameter if stability is critical.

RS-03K681JT Alternatives, Datasheet & Cross Reference | Guangdong Fenghua Advanced Technology Holding Co., Ltd.

Find verified substitutes and upgrade paths for the Fenghua RS-03K681JT, a 680Ω 0.1W 5% 0603 thick film resistor. Compare pin-compatible alternatives from Yageo, Fenghua, and others to ensure design reliability.

AI replacement insight

Package risklow

All suggested alternatives use the same 0603 package, ensuring physical compatibility.

Electrical riskmedium

Some alternatives have a worse TCR. This must be evaluated based on the specific circuit's sensitivity to temperature.

Sourcing risklow

The target and top alternatives are from major, active manufacturers, suggesting good availability.

Can it be replaced directly?

Yes, there are several direct replacements for RS-03K681JT. The best options are upgrades with tighter tolerance, such as RS-03K6800FT from the same manufacturer or the automotive-grade AC0603FR-07680RL from Yageo.

Best replacement path

Use an upgrade path candidate like RS-03K6800FT or AC0603FR-07680RL, which offer tighter tolerance (±1%) for improved precision with no other design changes.

Main risk

The main risk when substituting is using a part with a worse Temperature Coefficient (TCR), which could affect circuit stability in applications with temperature variations.

Recommended alternatives

Direct upgrade from the same manufacturer with tighter ±1% tolerance and identical key parameters.

View details

Alternative comparison matrix

Feature / factor	RS-03K681JT	RS-03K6800FT	AC0603FR-07680RL	FRC0603J681 TS	Compatibility / risk
Tolerance	±5.0%	±1.0%	±1.0%	±5.0%	±1.0% / ±5.0% — Candidate has tighter tolerance, which is a direct upgrade.; AC0603FR-07680RL: Candidate has tighter tolerance, which is a direct upgrade.; FRC0603J681 TS: Tolerance is identical.
Package	0603	0603	0603	0603	0603 — Same package ensures physical compatibility.; AC0603FR-07680RL: Same package ensures physical compatibility.; FRC0603J681 TS: Same package ensures physical compatibility.
Resistance	680.0 Ω	680.0 Ω	680.0 Ω	680.0 Ω	680.0 Ω — Resistance value is identical.; AC0603FR-07680RL: Resistance value is identical.; FRC0603J681 TS: Resistance value is identical.
Power	0.1 W	0.1 W	-	-	0.1 W — Power rating is identical.
Tcr	±100ppm/℃	±100ppm/℃	±100 ppm/°C	±400 ppm/°C	±100ppm/℃ / ±100 ppm/°C / ±400 ppm/°C — Temperature coefficient is identical.; AC0603FR-07680RL: Temperature coefficient is identical.; FRC0603J681 TS: Candidate TCR is significantly worse and may affect stability over temperature.
Application	Commercial	-	AEC-Q200	-	AEC-Q200 — Candidate is automotive grade, offering higher reliability.

Application & sourcing insights

Questions & answers

The best alternatives for RS-03K681JT are RS-03K6800FT and AC0603FR-07680RL. Both are upgrades with a tighter ±1% tolerance, matching all other critical specifications, and are readily available.