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DC1050R-105K Equivalent & Substitute Parts
Part Overview
The DC1050R-105K is a 1 mH fixed unshielded inductor manufactured by API Delevan Inc., designed for through-hole radial mounting applications. This component is rated for 2.1 A continuous current with a maximum DC resistance of 426 mOhm and operates across the temperature range of -55°C to 125°C. The part maintains Active product status with full RoHS3 compliance and REACH unaffected certification.
Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances. The DC1050R-105K has one qualified substitute in the current inventory.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Inductance | 1 | mH |
| Inductance Tolerance | ±10% | — |
| Current Rating | 2.1 | A |
| DC Resistance (Max) | 426 | mOhm |
| Saturation Current | 2.5 | A |
| Operating Temperature Range | -55 to 125 | °C |
| Shielding | Unshielded | — |
| Mounting Type | Through Hole | — |
| Package Type | Radial, Vertical Cylinder | — |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitution eligibility for the DC1050R-105K is determined by strict alignment of the following critical parameters:
Electrical Parameters:
- Inductance value: 1 mH at ±10% tolerance
- DC resistance: 426 mOhm maximum
- Current rating: minimum 2.0 A continuous
- Unshielded configuration
Mechanical Parameters:
- Through-hole radial mounting
- Physical dimensions compatible with vertical cylinder or equivalent radial package geometry
- Height seated maximum: 0.840 inches (21.34 mm)
Compliance & Status:
- Active product status
- RoHS3 compliance
- REACH unaffected status
The substitute part 1130-102K-RC meets all critical electrical and mechanical criteria within these defined parameters.
Parameter Comparison
| Parameter | DC1050R-105K (API Delevan) | 1130-102K-RC (Bourns) | Compatibility |
|---|---|---|---|
| Inductance | 1 mH | 1 mH | Match |
| Inductance Tolerance | ±10% | ±10% | Match |
| Current Rating | 2.1 A | 2.0 A | Compatible |
| DC Resistance (Max) | 426 mOhm | 426 mOhm | Match |
| Shielding | Unshielded | Unshielded | Match |
| Mounting Type | Through Hole | Through Hole | Match |
| Package Type | Radial, Vertical Cylinder | Radial | Compatible |
| Height - Seated (Max) | 0.840" (21.34 mm) | 0.840" (21.34 mm) | Match |
| Operating Temperature Range | -55°C to 125°C | -55°C to 105°C | Partial |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Match |
| Product Status | Active | Active | Match |
Engineering Selection Recommendations
Primary Selection: DC1050R-105K
The DC1050R-105K remains the primary component choice when the full operating temperature range of -55°C to 125°C is required. This part is Active status with full RoHS3 compliance and REACH unaffected certification.
Substitute Selection: 1130-102K-RC
The 1130-102K-RC (Bourns 1130 series) is a qualified substitute when operating temperature requirements do not exceed 105°C. This part meets all critical electrical specifications with identical inductance, tolerance, and DC resistance values. The current rating of 2.0 A is compatible with applications rated at or below this level. Both parts maintain Active product status and full RoHS3 compliance.
Temperature Consideration:
Applications requiring sustained operation above 105°C must use the DC1050R-105K. Applications with maximum operating temperature of 105°C or below may use either part based on availability and supply chain requirements.
Frequently Asked Questions (FAQ)
Q: Can the 1130-102K-RC replace the DC1050R-105K in all applications?
A: The 1130-102K-RC is compatible with applications where the maximum operating temperature does not exceed 105°C. The DC1050R-105K supports operation to 125°C. Verify your application's temperature requirements before substitution.
Q: Are the physical dimensions identical between these parts?
A: Both parts share the same seated height of 0.840 inches (21.34 mm). The DC1050R-105K has a diameter of 1.180 inches (29.98 mm), while the 1130-102K-RC has a diameter of 1.100 inches (27.94 mm). Both are radial through-hole packages and will fit standard PCB footprints designed for 1 mH radial inductors, though the slightly smaller diameter of the substitute may provide additional board clearance.
Q: Is the DC resistance specification identical?
A: Yes. Both parts specify a maximum DC resistance of 426 mOhm, ensuring equivalent power dissipation characteristics at rated current.
Q: What is the difference in current rating between these parts?
A: The DC1050R-105K is rated for 2.1 A continuous current, while the 1130-102K-RC is rated for 2.0 A. For applications requiring current above 2.0 A, the DC1050R-105K must be used.
Q: Are both parts RoHS3 compliant?
A: Yes. Both the DC1050R-105K and 1130-102K-RC are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.
Q: What is the inductance tolerance for both parts?
A: Both parts maintain ±10% inductance tolerance at 1 kHz test frequency, ensuring equivalent performance in circuit applications.
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