SDR1806-1R0ML Equivalent & Substitute Parts

Part Overview

The SDR1806-1R0ML is a 1 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 10 A continuous current with a maximum DC resistance of 4 mOhm. This component is designed for surface mount applications requiring fixed inductance in compact nonstandard packages. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent inductance values, compatible current ratings, and matching operating temperature ranges are maintained within acceptable tolerance and DC resistance parameters for the application.

Substiute Parts

SDR1806-1R0ML

Bourns Inc.In Stock: 946SDR1806-1R0ML Datasheet

Current PartRFQ

P0250.102NL

Pulse ElectronicsIn Stock: 877P0250.102NL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SDR1806-1R0ML is determined by the following criteria:

Primary Matching Parameters:

• Inductance value: 1 µH (exact match required)
• Inductance tolerance: ±20% or tighter
• Shielding configuration: Unshielded
• Mounting type: Surface Mount
• Operating temperature range: Minimum -40°C ~ 125°C or broader

Secondary Compatibility Parameters:

• Current rating: Must support the application's required current without saturation
• DC resistance: Lower or equal values preferred; higher values acceptable if thermal performance is verified
• Package type: Nonstandard surface mount compatible with board layout
• Compliance: RoHS3 and REACH status matching

The P0250.102NL from Pulse Electronics meets the primary matching criteria with identical inductance and compatible operating temperature range. Secondary parameters show acceptable variance in current rating and DC resistance within typical application tolerances.

Parameter Comparison

Engineering Selection Recommendations

SDR1806-1R0ML (Primary Selection)

• Recommended for applications requiring the full 10 A current rating
• Superior DC resistance performance (4 mOhm) minimizes thermal dissipation
• Higher saturation current (30 A) provides greater design margin
• Active product status with established supply chain

P0250.102NL (Substitute Selection)

• Suitable for applications with maximum current requirements of 8.6 A or lower
• Tighter inductance tolerance (±15%) may benefit precision-critical circuits
• Extended operating temperature range to 130°C accommodates higher ambient conditions
• Active product status with RoHS3 and REACH compliance maintained

Both parts maintain identical compliance certifications and unlimited moisture sensitivity rating (MSL 1). Selection between primary and substitute should be based on application current requirements and thermal design constraints.

Frequently Asked Questions (FAQ)

Q: Can P0250.102NL replace SDR1806-1R0ML in all applications?

A: No. The P0250.102NL has a reduced current rating (8.6 A vs. 10 A) and lower saturation current (20 A vs. 30 A). Substitution is valid only for applications where the circuit current does not exceed 8.6 A continuous operation.

Q: What is the impact of higher DC resistance in the P0250.102NL?

A: The P0250.102NL exhibits 9 mOhm maximum DC resistance compared to 4 mOhm in the SDR1806-1R0ML. At equivalent current levels, this results in increased resistive losses and higher component temperature rise. Thermal analysis is required for high-current applications.

Q: Are the physical dimensions compatible?

A: Both parts use nonstandard surface mount packages with similar footprints. SDR1806-1R0ML dimensions are 18.30mm L × 14.00mm W × 6.90mm H (max). P0250.102NL dimensions are 18.62mm L × 15.14mm W × 7.36mm H (max). Board layout verification is necessary to confirm mechanical fit.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both SDR1806-1R0ML and P0250.102NL are RoHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity ratings. Compliance documentation is equivalent for both parts.

Q: What inductance tolerance difference exists between these parts?

A: SDR1806-1R0ML has ±20% tolerance while P0250.102NL has ±15% tolerance. The tighter tolerance of the substitute may provide improved circuit performance in applications sensitive to inductance variation.