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CLF6045T-331M-CA Equivalent & Substitute Parts
Part Overview
The CLF6045T-331M-CA is a 330 µH shielded drum core wirewound inductor manufactured by TDK Corporation, rated for 440 mA continuous current with a maximum DC resistance of 1.164 Ohm. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing production and maintenance applications. The part is qualified to AEC-Q200 standards and operates across the temperature range of -40°C to 105°C.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Inductance | 330 µH |
| Tolerance | ±20% |
| Current Rating | 440 mA |
| DC Resistance (Max) | 1.164 Ohm |
| Saturation Current | 350 mA |
| Core Material | Ferrite |
| Shielding | Shielded |
| Operating Temperature | -40°C to 105°C |
| Mounting Type | Surface Mount |
| Package Type | Nonstandard |
| Ratings | AEC-Q200 |
Substitute Part Grouping Explanation
Substitution of the CLF6045T-331M-CA is determined by the following critical parameters:
- Inductance Value: Must remain 330 µH with ±20% tolerance
- Current Rating: Substitute must support minimum 440 mA continuous current
- DC Resistance: Maximum 1.164 Ohm to maintain circuit performance
- Core Type and Shielding: Ferrite core with shielding required for electromagnetic compatibility
- Saturation Current: Must meet or exceed 350 mA minimum threshold
- Operating Temperature Range: Must cover the required thermal envelope
- AEC-Q200 Qualification: Automotive-grade reliability standard compliance
The CLF6045NIT-331M-D meets the inductance, core material, shielding, and AEC-Q200 qualification requirements. However, the substitute exhibits a reduced current rating of 360 mA against the original 440 mA specification, representing a 18% reduction in current capacity.
Parameter Comparison
| Parameter | CLF6045T-331M-CA (Main) | CLF6045NIT-331M-D (Substitute) |
|---|---|---|
| Manufacturer | TDK Corporation | TDK Corporation |
| Inductance | 330 µH | 330 µH |
| Tolerance | ±20% | ±20% |
| Current Rating (Amps) | 440 mA | 360 mA |
| Saturation Current | 350 mA | 360 mA |
| DC Resistance (Max) | 1.164 Ohm | 1.1 Ohm |
| Core Material | Ferrite | Ferrite |
| Shielding | Shielded | Shielded |
| Operating Temperature | -40°C to 105°C | -55°C to 150°C |
| Mounting Type | Surface Mount | Surface Mount |
| Ratings | AEC-Q200 | AEC-Q200 |
| Product Status | Obsolete | Active |
| Size / Dimension | 0.244" L x 0.232" W (6.20mm x 5.90mm) | 0.248" L x 0.236" W (6.30mm x 6.00mm) |
| Height - Seated (Max) | 0.189" (4.80mm) | 0.189" (4.80mm) |
Engineering Selection Recommendations
The CLF6045NIT-331M-D is an active product from TDK Corporation and maintains AEC-Q200 qualification, making it suitable for automotive and industrial applications requiring automotive-grade reliability. The substitute provides an improved operating temperature range (-55°C to 150°C versus -40°C to 105°C) and lower DC resistance (1.1 Ohm versus 1.164 Ohm maximum).
The primary design consideration is the current rating differential. The substitute part is rated for 360 mA continuous current compared to the original 440 mA specification. Circuit designs operating at or near the 440 mA threshold require verification that the reduced current capacity of the substitute does not compromise system performance or thermal margins.
Both parts share identical inductance values, tolerance specifications, ferrite core construction, shielding characteristics, and mounting methodology, supporting direct functional substitution within current rating constraints.
Frequently Asked Questions (FAQ)
Q: Can CLF6045NIT-331M-D replace CLF6045T-331M-CA in all applications?
A: Substitution is valid for applications where the circuit current demand does not exceed 360 mA continuous operation. Applications requiring the full 440 mA rating of the original part require alternative solutions.
Q: What is the significance of the current rating difference?
A: The 80 mA reduction in current rating (from 440 mA to 360 mA) represents the maximum continuous current the substitute can safely handle without exceeding thermal and saturation limits. Circuit designs must operate within this reduced specification.
Q: Are the physical dimensions compatible?
A: Both parts are surface mount components with identical seated height (0.189" / 4.80mm). The substitute dimensions are marginally larger (0.248" L x 0.236" W versus 0.244" L x 0.232" W), representing a 0.4% increase in length and 1.7% increase in width. PCB layout verification is recommended for space-constrained designs.
Q: Does the substitute maintain automotive qualification?
A: Yes, CLF6045NIT-331M-D carries AEC-Q200 qualification identical to the original part, supporting automotive and industrial applications with equivalent reliability standards.
Q: What is the advantage of the extended operating temperature range?
A: The substitute operates from -55°C to 150°C compared to the original -40°C to 105°C range, providing broader thermal envelope coverage for extreme environment applications.
Q: Is RoHS compliance a consideration?
A: The substitute is ROHS3 compliant. Original part RoHS status was not specified in available documentation.
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