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CDRH169RBNP-561MC
Sumida America Components Inc.
INDUCTOR
2250 Pcs New Original In Stock
560 µH Shielded Drum Core, Wirewound Inductor 1.05 A 460mOhm Max Nonstandard
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5.0 / 5.0
- (377 Ratings)
CDRH169RBNP-561MC
Product Overview
2717003
DiGi Electronics Part Number
CDRH169RBNP-561MC-DGManufacturer
Sumida America Components Inc.
CDRH169RBNP-561MC
Description
INDUCTORInventory
2250 Pcs New Original In Stock
560 µH Shielded Drum Core, Wirewound Inductor 1.05 A 460mOhm Max Nonstandard
Quantity
Minimum 1
Minimum 1
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CDRH169RBNP-561MC Technical Specifications
Category
Fixed Inductors
Packaging
Tape & Reel (TR)
Series
CDRH169RB
Product Status
Active
Type
Drum Core, Wirewound
Material - Core
Ferrite
Inductance
560 µH
Tolerance
±20%
Current Rating (Amps)
1.05 A
Current - Saturation (Isat)
1.5A
Shielding
Shielded
DC Resistance (DCR)
460mOhm Max
Q @ Freq
-
Frequency - Self Resonant
-
Ratings
-
Operating Temperature
-40°C ~ 105°C
Inductance Frequency - Test
100 kHz
Features
-
Mounting Type
Surface Mount
Package / Case
Nonstandard
Supplier Device Package
-
Size / Dimension
0.630" L x 0.630" W (16.00mm x 16.00mm)
Height - Seated (Max)
0.394" (10.00mm)
Datasheet & Documents
HTML Datasheet
CDRH169RBNP-561MC-DG
Environmental & Export Classification
Moisture Sensitivity Level (MSL)
1 (Unlimited)
Additional Information
Other Names
308-CDRH169RBNP-561MCTR
Standard Package
200
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
They offer the best prices with customer service that truly cares.
Dec 02, 2025
I trust the durability and performance of their products after years of use.
Dec 02, 2025
Every experience has been smooth, with reliable products and attentive service.
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Frequently Asked Questions (FAQ)
When designing a DC-DC converter for a 24V industrial application, what are the thermal and saturation risks of using the Sumida CDRH169RBNP-561MC inductor at its rated 1.05A, and how should I derate it?
The CDRH169RBNP-561MC has a 1.05A current rating (temperature rise) and a 1.5A saturation current (Isat). In a 24V industrial environment at 105°C ambient, you must design for the lower of the two limits based on your peak switching current. Saturation occurs at 1.5A; exceeding this even momentarily causes a sharp inductance drop, leading to converter instability or overcurrent. For reliable operation, ensure your peak inductor current (DC current + 1/2 ripple) stays below 1.2A (80% of Isat) to maintain core stability. The 460mΩ DCR will cause significant copper loss; at 1.05A DC, I²R loss is ~0.5W, which can cause a 20-30°C temperature rise in still air, so you must verify board layout thermal dissipation, especially near other heat sources.
Can I replace a Wurth 744771156 (560µH, 1.2A) or Bourns SRR1280-561K with the Sumida CDRH169RBNP-561MC in an existing power supply design without respinning the PCB?
Yes, but verify footprint compatibility and performance trade-offs. The CDRH169RBNP-561MC has a 16.0mm x 16.0mm footprint and 10.0mm max height, identical to the SRR1280-561K (12.5x12.5x10.0?) actually SRR1280 is 12.5mm square; double-check. The Wurth 744771156 is 12.5x12.5x10.0. The Sumida is larger (16mm square), so it will not fit existing pads for those 12.5mm parts without a redesign. If footprint is not an issue, the Sumida offers slightly lower DCR (460mΩ vs typical 500-600mΩ) which improves efficiency, but its saturation current is 1.5A vs the Wurth’s 1.2A—so it handles overload better. However, the Sumida’s operating temperature is only up to 105°C (the Wurth and Bourns often go to 125°C or 150°C), so verify your thermal margin if ambient exceeds 85°C.
In a 560µH shielded inductor selection for a noise-sensitive audio or sensor power rail, what are the real-world shielding effectiveness differences between the CDRH169RBNP-561MC and unshielded alternatives, and how does its ferrite core material affect EMI?
The CDRH169RBNP-561MC uses a ferrite drum core with a magnetic shield (the metal casing), providing excellent flux containment compared to unshielded bobbin or open-drum types. This reduces radiated EMI by about 10-20dB typically, crucial for sensitive analog rails. However, the ferrite material has high permeability, which can cause minor fringe fields at the shield gaps—so do not place critical traces or sense lines directly underneath. For audio or high-precision ADC power, maintain a clearance of at least 3mm from the inductor body to sensitive loops. Also, because it is a wirewound shielded type, it has lower core loss than molded inductors at high ripple frequencies but slightly higher acoustic noise potential under high ripple current; if your switching frequency is above 100kHz, verify no audible whine occurs by checking the mechanical resonance with your PCB mounting.
What are the design implications of the CDRH169RBNP-561MC missing self-resonant frequency (SRF) and Q factor specifications for a high-frequency (500kHz to 2MHz) switching regulator?
The absence of SRF and Q data on the CDRH169RBNP-561MC indicates it is optimized for low-frequency (100 kHz to 300 kHz) power conversion. If you operate it at 500 kHz to 2 MHz, the inter-winding capacitance will reduce effective inductance and increase core loss, potentially causing unexpected high-frequency oscillations or reduced efficiency. To safely use it above 500 kHz, you must empirically measure the inductance roll-off with a network analyzer or substitute a known high-frequency model. As a general rule, for switching frequencies above 500 kHz, choose an inductor that explicitly specifies SRF > 5x switching frequency. For 560µH, that typically limits practical switching frequency to ≤300 kHz to maintain predictable performance. If your design requires higher frequency, consider using a lower inductance value or a different series with controlled SRF.
How does the 105°C maximum operating temperature of the CDRH169RBNP-561MC impact long-term reliability in automotive or outdoor power supplies, and what mitigation steps should I take?
The 105°C rating is an ambient or case temperature limit; exceeding it accelerates ferrite core aging and insulation breakdown. For automotive under-hood or outdoor enclosures with solar loading, ambient can exceed 85°C, and self-heating adds 20-30°C, pushing the inductor near or over its limit. This reduces mean time between failures (MTBF) significantly. Mitigation: 1) Derate the RMS current to keep temperature rise under 30°C (e.g., limit to 0.8A RMS instead of 1.05A). 2) Use thermal vias under the component’s ground pads to dissipate heat to inner copper layers. 3) Select a conformal coating or potting if used in humid or vibration-prone environments, as the MSL1 rating only addresses soldering, not long-term moisture ingress. 4) If the application requires 125°C operation, consider a direct replacement like the Bourns SRR1280-561K (rated 125°C) or Vishay IHLP series (up to 155°C).
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CDRH169RBNP-561MC CAD Models
Sumida America Components Inc. CDRH169RBNP-561MC PCB symbols & footprints
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