
UNI-ROYAL
A 51Ω 0402 resistor with a wider tolerance (±5%) that may be suitable for less critical applications.
FRC0402F51R0TS is a 51Ω, 1% tolerance, 1/16W resistor in an 0402 package. Alternatives exist with different tolerances or nominal resistance values that require careful review.
Tolerance and resistance value mismatches require circuit analysis.
All candidates share the same 0402 package.
There are no direct, fully equivalent replacements for FRC0402F51R0TS in this list. All candidates have parametric differences in tolerance or resistance value.
No direct drop-in replacement found. For precision, consider Yageo RT series parts if a 49.9Ω value is acceptable. For general use, several 51Ω 5% parts are available.
The main risk is substituting a part with a wider tolerance (e.g., 5%) or a different nominal resistance (e.g., 49.9Ω), which can affect circuit performance.

UNI-ROYAL
A 51Ω 0402 resistor with a wider tolerance (±5%) that may be suitable for less critical applications.
| Feature / factor | FRC0402F51R0TS | 0402WGJ0510TCE | FRC0402J510 TS | WR04X510JTL | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 0402 | 0402 | 0402 | 0402 | 0402 — Form-fit compatible.; FRC0402J510 TS: Form-fit compatible.; WR04X510JTL: Form-fit compatible.; RT0402BRD0749R9L: Form-fit compatible. |
| Resistance | 51.0 Ω | 51.0 Ω | 51.0 Ω | 51.0 Ω | 51.0 Ω / 49.9 Ω — Nominal resistance matches.; FRC0402J510 TS: Nominal resistance matches.; WR04X510JTL: Nominal resistance matches.; RT0402BRD0749R9L: Slightly different nominal resistance. |
| Tolerance | ±1.0% | ±5.0% | ±5.0% | ±5.0% | ±5.0% / ±0.1% — Wider tolerance is a downgrade.; FRC0402J510 TS: Wider tolerance is a downgrade.; WR04X510JTL: Wider tolerance is a downgrade.; RT0402BRD0749R9L: Tighter tolerance is an upgrade. |
| Tcr | ±100 ppm/°C | Not specified | ±400 ppm/°C | Not specified | Not specified / ±400 ppm/°C / 25 ppm/°C — Missing TCR requires datasheet review.; FRC0402J510 TS: Significantly worse temperature stability.; WR04X510JTL: Missing TCR requires datasheet review.; RT0402BRD0749R9L: Significantly better temperature stability. |
| Power | 1/16W | - | 1/16W | 1/16W | 1/16W — Power rating matches.; WR04X510JTL: Power rating matches. |
| Technology | Thick Film | - | - | - | Thin Film — Thin film offers better stability/noise. |
The best alternative depends on your circuit's needs. If a ~2% resistance change is acceptable, Yageo's RT0402BRD0749R9L offers superior tolerance and stability. If the 51Ω value is critical, you must accept a wider ±5% tolerance from parts like Walsin's WR04X510JTL.