CDR156NP-470LC Equivalent & Substitute Parts

Part Overview

The CDR156NP-470LC is a 47 µH unshielded drum core wirewound inductor manufactured by Sumida America Components Inc., rated for 2.5 A continuous current with a maximum DC resistance of 97.8 mOhm. This component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing production support and design continuity. The part operates across the temperature range of -40°C to 100°C and is RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Substiute Parts

CDR156NP-470LC

Sumida America Components Inc.In Stock: 1019CDR156NP-470LC Datasheet

Current PartRFQ

P0250.473NLT

Pulse ElectronicsIn Stock: 4264P0250.473NLT Datasheet

DirectRFQ

SDR1806-470ML

Bourns Inc.In Stock: 5160SDR1806-470ML Datasheet

SimilarRFQ

SDR2207-470KL

Bourns Inc.In Stock: 3002SDR2207-470KL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CDR156NP-470LC are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Inductance value: 47 µH (exact match required)
• Inductance tolerance: ±15% or tighter
• Current rating: minimum 2.5 A
• DC resistance: maximum 97.8 mOhm or lower
• Core type: Drum core wirewound or wirewound construction
• Shielding: Unshielded
• Mounting type: Surface mount
• Operating temperature range: minimum -40°C to 100°C coverage
• RoHS3 compliance
• MSL rating: 1 (Unlimited)

All substitute parts listed maintain these critical parameters within acceptable engineering tolerances for direct functional replacement in surface mount applications requiring 47 µH inductance at 2.5 A or higher current ratings.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitution Priority:

P0250.473NLT (Pulse Electronics) qualifies as a direct substitute with the following characteristics: active product status ensures ongoing availability, current rating of 2.6 A exceeds the 2.5 A requirement, DC resistance of 86 mOhm is lower than the 97.8 mOhm maximum, and operating temperature range extends to 130°C. Physical dimensions (18.62 × 15.14 × 7.36 mm) are within acceptable tolerance of the original part. RoHS3 compliance and MSL 1 rating match the original specification. Tape & Reel packaging provides standard production handling.

SDR1806-470ML (Bourns Inc.) provides equivalent substitution with active product status, matching current rating of 2.5 A, DC resistance of 95 mOhm within specification, and ferrite drum core construction identical to the original. Operating temperature range of -40°C to 125°C exceeds the original -40°C to 100°C requirement. Physical dimensions (18.30 × 14.00 × 6.90 mm) are closely matched. Inductance tolerance of ±20% is broader than the original ±15%, but remains within acceptable engineering margins. RoHS3 compliance and MSL 1 rating are maintained.

SDR2207-470KL (Bourns Inc.) qualifies as a substitute with enhanced performance characteristics: active product status, current rating of 2.8 A provides margin above the 2.5 A requirement, DC resistance of 91.2 mOhm is lower than specification maximum, and inductance tolerance of ±10% is tighter than the original ±15%. Ferrite drum core construction and unshielded design match the original. Operating temperature range of -40°C to 125°C exceeds requirements. Physical dimensions (22.00 × 15.00 × 7.80 mm) show increased length; PCB layout verification is required for space-constrained applications. RoHS3 compliance and MSL 1 rating are maintained.

All substitute parts maintain RoHS3 compliance and unlimited moisture sensitivity rating, ensuring regulatory and environmental compatibility with the original CDR156NP-470LC specification.

Frequently Asked Questions (FAQ)

Q: Can P0250.473NLT replace CDR156NP-470LC in all applications?

A: P0250.473NLT meets all electrical substitution criteria: 47 µH inductance, 2.6 A current rating exceeding the 2.5 A requirement, and 86 mOhm DC resistance lower than the 97.8 mOhm maximum. Physical dimensions (18.62 × 15.14 × 7.36 mm) are within acceptable tolerance of the original (18.50 × 15.00 × 7.00 mm). Extended operating temperature range to 130°C provides additional margin. Verification of PCB footprint compatibility is recommended for space-constrained layouts.

Q: What is the difference between SDR1806-470ML and SDR2207-470KL?

A: Both are Bourns ferrite drum core inductors with 47 µH inductance and active product status. SDR1806-470ML matches the original 2.5 A current rating with 95 mOhm DCR and ±20% tolerance. SDR2207-470KL provides higher performance with 2.8 A current rating, 91.2 mOhm DCR, and tighter ±10% tolerance. SDR2207-470KL is physically larger (22.00 × 15.00 × 7.80 mm versus 18.30 × 14.00 × 6.90 mm), requiring PCB layout verification for applications with space constraints.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed—P0250.473NLT, SDR1806-470ML, and SDR2207-470KL—are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original CDR156NP-470LC specification.

Q: What is the significance of inductance tolerance differences?

A: The original CDR156NP-470LC specifies ±15% tolerance. SDR1806-470ML has ±20% tolerance (broader), while SDR2207-470KL has ±10% tolerance (tighter). For applications requiring precise inductance values, SDR2207-470KL provides superior tolerance performance. For general applications, ±20% tolerance remains within acceptable engineering margins for 47 µH inductors.

Q: How do DC resistance values affect circuit performance?

A: DC resistance directly impacts power dissipation and voltage drop across the inductor. The original CDR156NP-470LC specifies 97.8 mOhm maximum. All substitute parts provide equal or lower DCR: P0250.473NLT (86 mOhm), SDR1806-470ML (95 mOhm), and SDR2207-470KL (91.2 mOhm). Lower DCR values reduce power loss and heat generation, providing performance improvement or equivalent operation.

Q: Are physical dimension differences critical for PCB layout?

A: Physical dimensions vary among substitutes. P0250.473NLT (18.62 × 15.14 × 7.36 mm) and SDR1806-470ML (18.30 × 14.00 × 6.90 mm) are closely matched to the original (18.50 × 15.00 × 7.00 mm). SDR2207-470KL (22.00 × 15.00 × 7.80 mm) is significantly larger in length. For applications with tight PCB spacing, P0250.473NLT or SDR1806-470ML are preferred. SDR2207-470KL requires verification of available board space before implementation.

Q: What packaging formats are available?

A: P0250.473NLT, SDR1806-470ML, and SDR2207-470KL are supplied in Tape & Reel (TR) format, providing standard production handling and automated assembly compatibility. Original packaging format for CDR156NP-470LC was not specified in available documentation.

Q: Can saturation current ratings be exceeded?

A: No. Saturation current (Isat) represents the maximum current before inductor core saturation occurs, causing inductance collapse. The original CDR156NP-470LC has Isat of 4.2 A. All substitutes provide equal or higher saturation ratings: P0250.473NLT (4.5 A), SDR1806-470ML (4.6 A), and SDR2207-470KL (5.0 A). Circuit design must ensure operating current remains below saturation limits.