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CD105NP-121KC Equivalent & Substitute Parts
Part Overview
The CD105NP-121KC is a 120 µH unshielded ferrite core inductor manufactured by Sumida America Components Inc. This surface mount component is rated for 890 mA continuous current with a maximum DC resistance of 400 mOhm and operates across the temperature range of -40°C to 100°C. The part is classified as Active status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained within the allowed parameter tolerances for this product category.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Inductance | 120 | µH |
| Inductance Tolerance | ±10% | - |
| Current Rating | 890 | mA |
| DC Resistance (Max) | 400 | mOhm |
| Core Material | Ferrite | - |
| Shielding | Unshielded | - |
| Mounting Type | Surface Mount | - |
| Operating Temperature Range | -40°C to 100°C | - |
| RoHS Status | ROHS3 Compliant | - |
| Moisture Sensitivity Level | 1 (Unlimited) | - |
Substitute Part Grouping Explanation
Substitution of the CD105NP-121KC is determined by strict equivalence across the following critical parameters:
Electrical Equivalence Requirements:
- Inductance value of 120 µH with ±10% tolerance
- Current rating of 890 mA minimum
- DC resistance not exceeding 400 mOhm
- Ferrite core material
- Unshielded configuration
Mechanical Equivalence Requirements:
- Surface mount packaging
- Nonstandard package case
- Height seated maximum of 0.228" (5.80mm)
- Tape & Reel packaging format
Compliance Requirements:
- RoHS3 compliance
- Moisture Sensitivity Level 1
- Active product status
The substitute part SDR1006-121KL meets all electrical and mechanical parameters within the allowed tolerances for this product category.
Parameter Comparison
| Parameter | CD105NP-121KC (Sumida) | SDR1006-121KL (Bourns) | Match Status |
|---|---|---|---|
| Inductance | 120 µH | 120 µH | Equivalent |
| Inductance Tolerance | ±10% | ±10% | Equivalent |
| Current Rating | 890 mA | 890 mA | Equivalent |
| DC Resistance (Max) | 400 mOhm | 400 mOhm | Equivalent |
| Core Material | Ferrite | Ferrite | Equivalent |
| Shielding | Unshielded | Unshielded | Equivalent |
| Mounting Type | Surface Mount | Surface Mount | Equivalent |
| Height - Seated (Max) | 0.228" (5.80mm) | 0.228" (5.80mm) | Equivalent |
| Operating Temperature Range | -40°C to 100°C | -40°C to 125°C | Compatible |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Equivalent |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) | Equivalent |
| Packaging Format | Tape & Reel (TR) | Tape & Reel (TR) | Equivalent |
Engineering Selection Recommendations
The SDR1006-121KL from Bourns Inc. is a direct substitute for the CD105NP-121KC. Both components maintain Active product status and full RoHS3 compliance. The substitute part demonstrates identical electrical specifications across inductance, current rating, and DC resistance parameters. Mechanical compatibility is confirmed through equivalent mounting type, package height, and tape & reel packaging format.
The SDR1006-121KL provides an extended operating temperature range of -40°C to 125°C compared to the CD105NP-121KC range of -40°C to 100°C, which represents an operational advantage in higher temperature environments. Both components carry Moisture Sensitivity Level 1 classification, indicating unlimited shelf life under standard storage conditions.
Selection between these parts may be based on availability, lead time, or supply chain requirements, as both components satisfy the electrical and mechanical requirements for this application category.
Frequently Asked Questions (FAQ)
Q: What makes SDR1006-121KL a valid substitute for CD105NP-121KC?
A: The SDR1006-121KL meets all critical electrical parameters: 120 µH inductance at ±10% tolerance, 890 mA current rating, and 400 mOhm maximum DC resistance. Mechanical compatibility is confirmed through identical surface mount configuration, package height of 5.80mm, and tape & reel packaging. Both components are RoHS3 compliant with MSL 1 rating.
Q: Are there dimensional differences between these parts?
A: The length and width dimensions differ slightly. The CD105NP-121KC measures 0.394" L x 0.354" W (10.00mm x 9.00mm), while the SDR1006-121KL measures 0.386" L x 0.386" W (9.80mm x 9.80mm). The critical seated height of 5.80mm is identical for both parts. These dimensional variations remain within acceptable tolerances for surface mount placement on standard PCB layouts.
Q: What is the difference in operating temperature ranges?
A: The CD105NP-121KC operates from -40°C to 100°C, while the SDR1006-121KL operates from -40°C to 125°C. The substitute part supports a wider high-temperature range, making it suitable for applications requiring extended thermal performance.
Q: Do both parts have the same moisture sensitivity classification?
A: Yes. Both the CD105NP-121KC and SDR1006-121KL carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture-related shelf life restrictions under standard storage conditions.
Q: What is the core type difference between these inductors?
A: Both parts use ferrite core material. The CD105NP-121KC is specified as a standard ferrite core inductor, while the SDR1006-121KL is identified as a drum core, wirewound inductor. Both configurations deliver the equivalent 120 µH inductance with identical electrical performance parameters.
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