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RT0402FRE0729K4L Equivalent & Substitute Parts
Part Overview
The RT0402FRE0729K4L is a 29.4 kOhms ±1% thin film chip resistor in 0402 (1005 Metric) package manufactured by YAGEO. This surface-mount device is rated for 0.063W (1/16W) power dissipation and operates across -55°C to 155°C. The part is ROHS3 compliant and carries MSL 1 (Unlimited) moisture sensitivity rating, indicating suitability for standard manufacturing environments.
Substitute parts are identified when equivalent resistance values, package dimensions, power ratings, and operating temperature ranges are maintained while offering improved tolerance specifications or alternative manufacturer sourcing.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resistance | 29.4 kOhms |
| Tolerance | ±1% |
| Power Rating | 0.063W (1/16W) |
| Package | 0402 (1005 Metric) |
| Composition | Thin Film |
| Operating Temperature | -55°C to 155°C |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility is determined by the following criteria:
- Identical resistance value: 29.4 kOhms
- Identical package: 0402 (1005 Metric)
- Identical power rating: 0.063W (1/16W)
- Identical composition: Thin Film
- Operating temperature range: -55°C to 155°C minimum
- Tolerance: Equal to or tighter than ±1%
- RoHS3 compliance maintained
- MSL rating: 1 (Unlimited)
All identified substitute parts meet these criteria. Variations in tolerance (±0.1%, ±0.5%) and temperature coefficient represent performance improvements or alternative sourcing options from YAGEO, TE Connectivity, and Panasonic.
Parameter Comparison
| Part Number | Manufacturer | Resistance | Tolerance | Power Rating | Temp Coeff | Op. Temp Range | Package | Height (Max) | RoHS3 | MSL |
|---|---|---|---|---|---|---|---|---|---|---|
| RT0402FRE0729K4L | YAGEO | 29.4 kΩ | ±1% | 0.063W | ±50ppm/°C | -55°C to 155°C | 0402 | 0.014" | Yes | 1 |
| RT0402BRD0729K4L | YAGEO | 29.4 kΩ | ±0.1% | 0.063W | ±25ppm/°C | -55°C to 155°C | 0402 | 0.014" | Yes | 1 |
| RT0402BRE0729K4L | YAGEO | 29.4 kΩ | ±0.1% | 0.063W | ±50ppm/°C | -55°C to 155°C | 0402 | 0.014" | Yes | 1 |
| RT0402DRE0729K4L | YAGEO | 29.4 kΩ | ±0.5% | 0.063W | ±50ppm/°C | -55°C to 155°C | 0402 | 0.014" | Yes | 1 |
| CPF0402B29K4E1 | TE Connectivity | 29.4 kΩ | ±0.1% | 0.063W | ±25ppm/°C | -55°C to 155°C | 0402 | 0.014" | Yes | 1 |
| ERA-2AEB2942X | Panasonic | 29.4 kΩ | ±0.1% | 0.063W | ±25ppm/°C | -55°C to 155°C | 0402 | 0.016" | Yes | 1 |
Engineering Selection Recommendations
All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) rating, ensuring compatibility with standard manufacturing processes.
RT0402BRD0729K4L and RT0402BRE0729K4L offer tighter tolerance (±0.1%) compared to the original ±1% specification. RT0402BRD0729K4L additionally provides reduced temperature coefficient (±25ppm/°C vs. ±50ppm/°C), beneficial for temperature-sensitive applications.
RT0402DRE0729K4L maintains the original ±50ppm/°C temperature coefficient while offering ±0.5% tolerance as an intermediate option.
CPF0402B29K4E1 from TE Connectivity (Neohm series) provides equivalent ±0.1% tolerance and ±25ppm/°C temperature coefficient with identical package dimensions.
ERA-2AEB2942X from Panasonic carries AEC-Q200 automotive qualification, suitable for automotive-grade applications. Height specification is 0.016" (0.40mm) versus 0.014" (0.35mm) for other options; verify PCB clearance requirements before selection.
Frequently Asked Questions (FAQ)
Q: Can RT0402DRE0729K4L replace RT0402FRE0729K4L in all applications?
A: Yes. RT0402DRE0729K4L maintains identical resistance, power rating, package, and operating temperature range. The ±0.5% tolerance is tighter than the original ±1%, making it a direct functional substitute.
Q: What is the difference between RT0402BRD0729K4L and RT0402BRE0729K4L?
A: Both offer ±0.1% tolerance. RT0402BRD0729K4L specifies ±25ppm/°C temperature coefficient, while RT0402BRE0729K4L specifies ±50ppm/°C. Select RT0402BRD0729K4L for applications requiring superior temperature stability.
Q: Is ERA-2AEB2942X compatible with non-automotive applications?
A: Yes. ERA-2AEB2942X meets all electrical and mechanical specifications for standard applications. The AEC-Q200 qualification is an additional feature; it does not restrict use in non-automotive designs. Note the 0.016" maximum height versus 0.014" for other options.
Q: Can I use CPF0402B29K4E1 as a direct replacement?
A: Yes. CPF0402B29K4E1 from TE Connectivity matches all critical parameters: 29.4 kOhms ±0.1%, 0.063W, 0402 package, -55°C to 155°C operating range, and ROHS3 compliance.
Q: Which substitute offers the best tolerance and temperature stability?
A: RT0402BRD0729K4L, CPF0402B29K4E1, and ERA-2AEB2942X all provide ±0.1% tolerance and ±25ppm/°C temperature coefficient. Selection depends on manufacturer preference, inventory availability, and application-specific requirements such as automotive qualification.
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