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Fixed Inductor 1433445C Equivalent & Substitute Parts
Part Overview
The Murata Power Solutions Inc. 1433445C is a 330 µH unshielded wirewound inductor rated for 4.5 A continuous current with a maximum DC resistance of 91mOhm. This through-hole radial component operates across the -40°C to 85°C temperature range and is designed for applications requiring stable inductance at 1 kHz test frequency. The part maintains Active product status with full ROHS3 compliance and REACH unaffected designation. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Inductance | 330 | µH |
| Inductance Tolerance | ±10% | % |
| Current Rating | 4.5 | A |
| DC Resistance (Max) | 91 | mOhm |
| Shielding | Unshielded | — |
| Mounting Type | Through Hole | — |
| Package Type | Radial, Vertical Cylinder | — |
| Operating Temperature Range | -40°C to 85°C | °C |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitution eligibility for the 1433445C is determined by the following critical parameters:
- Inductance Value: 330 µH ±10% tolerance
- Current Rating: Minimum 4.5 A continuous
- DC Resistance: Maximum 91mOhm (lower values acceptable)
- Mounting Configuration: Through-hole radial package
- Shielding Classification: Unshielded
- Regulatory Compliance: ROHS3 Compliant, REACH Unaffected
The Bourns Inc. 1130-331K-RC meets all substitution criteria. Both parts share identical inductance specifications, current ratings, and mounting configurations. The substitute exhibits slightly higher DC resistance (122mOhm max) and operates across an extended temperature range (-55°C to 105°C), providing broader environmental compatibility while maintaining functional equivalence for the specified application parameters.
Parameter Comparison
| Parameter | 1433445C (Murata) | 1130-331K-RC (Bourns) | Compatibility |
|---|---|---|---|
| Inductance | 330 µH | 330 µH | Equivalent |
| Inductance Tolerance | ±10% | ±10% | Equivalent |
| Current Rating | 4.5 A | 4.5 A | Equivalent |
| DC Resistance (Max) | 91 mOhm | 122 mOhm | Substitute acceptable |
| Shielding | Unshielded | Unshielded | Equivalent |
| Mounting Type | Through Hole | Through Hole | Equivalent |
| Package Type | Radial, Vertical Cylinder | Radial | Compatible |
| Operating Temperature | -40°C to 85°C | -55°C to 105°C | Substitute covers wider range |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Equivalent |
| REACH Status | REACH Unaffected | REACH Unaffected | Equivalent |
Engineering Selection Recommendations
Both the 1433445C and 1130-331K-RC maintain Active product status with full regulatory compliance. Selection between these parts should be based on:
Primary Consideration: DC resistance impact on circuit performance. The 1433445C exhibits lower DC resistance (91mOhm max) compared to the substitute (122mOhm max). Applications sensitive to resistive losses should prioritize the primary part.
Secondary Consideration: Temperature operating range. The 1130-331K-RC supports extended temperature operation (-55°C to 105°C) versus the 1433445C (-40°C to 85°C). Applications requiring operation beyond the primary part's temperature limits benefit from the substitute.
Compliance: Both parts satisfy ROHS3 and REACH requirements, ensuring regulatory compatibility in restricted substance applications.
Availability: Selection may be influenced by inventory status and supply chain considerations between manufacturers.
Frequently Asked Questions (FAQ)
Q: Can the 1130-331K-RC directly replace the 1433445C in existing designs?
A: Yes, within the specified electrical parameters. Both parts provide 330 µH inductance at 4.5 A rating with through-hole radial mounting. The substitute's higher DC resistance (122mOhm vs 91mOhm) may introduce measurable voltage drop differences in high-current applications. Circuit simulation or bench testing is appropriate for applications where this 31mOhm difference impacts performance margins.
Q: What is the physical size difference between these parts?
A: The 1433445C measures 1.252" diameter × 0.917" height. The 1130-331K-RC measures 1.100" diameter × 0.840" height. The substitute is physically smaller and may offer PCB layout advantages in space-constrained designs.
Q: Are both parts suitable for high-temperature applications?
A: The 1433445C operates to 85°C maximum. The 1130-331K-RC extends to 105°C. For applications requiring sustained operation above 85°C, the substitute provides specified thermal headroom.
Q: Do these parts have identical electrical characteristics at 1 kHz?
A: Both parts are specified at 1 kHz inductance test frequency with ±10% tolerance. The 1433445C provides Q factor data (25 @ 50kHz) and self-resonant frequency (1.6MHz). The 1130-331K-RC does not specify these parameters in the provided data.
Q: What packaging formats are available for these inductors?
A: Both parts are supplied in Bulk packaging for through-hole assembly. No surface-mount variants are specified for these part numbers.
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