Bourns 9250-472 Equivalent & Substitute Parts

Part Overview

The Bourns 9250-472 is a 4.7 µH shielded drum core wirewound inductor rated for 380 mA with a maximum DC resistance of 550 mOhm. This through-hole axial component operates across -55°C to 105°C and features ferrite core construction with ±10% inductance tolerance.

The 9250-472 carries obsolete product status. Equivalent and substitute parts are available from Bourns Inc. and API Delevan Inc. with active product status, offering improved availability and compliance certifications.

Key Parameters

Parameter	Value
Inductance	4.7 µH
Inductance Tolerance	±10%
Current Rating	380 mA
DC Resistance (Max)	550 mOhm
Shielding	Shielded
Core Material	Ferrite
Q @ Frequency	44 @ 7.9 MHz
Self Resonant Frequency	70 MHz
Operating Temperature Range	-55°C to 105°C
Mounting Type	Through Hole
Package	Axial
Size	0.162" Dia x 0.410" L (4.11 mm x 10.41 mm)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Inductance value: 4.7 µH
Inductance tolerance: ±10%
Current rating: 380 mA minimum
DC resistance: 550 mOhm maximum
Shielding: Shielded configuration
Mounting type: Through hole axial
Physical dimensions: 0.162" Dia x 0.410" L

Substitute parts are grouped into two categories:

Direct Equivalent (Bourns 9250A-472-RC): Identical electrical specifications with active product status and improved temperature range (-55°C to 125°C). Molded construction replaces drum core design. RoHS3 compliant.

Similar Equivalents (API Delevan ER1641 and 1641R series): Meet all critical electrical parameters with iron core construction. Available in multiple packaging options (Tape & Reel, Cut Tape, Bulk). Current ratings range from 380 mA to 390 mA, accommodating the original specification.

Parameter Comparison

Parameter	9250-472 (Main)	9250A-472-RC	1641R-472K	ER1641-472KM	ER1641-472KP	ER1641-472KR
Manufacturer	Bourns Inc.	Bourns Inc.	API Delevan Inc.	API Delevan Inc.	API Delevan Inc.	API Delevan Inc.
Inductance	4.7 µH	4.7 µH	4.7 µH	4.7 µH	4.7 µH	4.7 µH
Tolerance	±10%	±10%	±10%	±10%	±10%	±10%
Current Rating (mA)	380	380	390	380	380	380
DC Resistance (Max)	550 mOhm	550 mOhm	550 mOhm	550 mOhm	550 mOhm	550 mOhm
Q @ 7.9 MHz	44	44	44	44	44	44
Self Resonant Frequency	70 MHz	70 MHz	70 MHz	70 MHz	70 MHz	70 MHz
Operating Temperature	-55°C to 105°C	-55°C to 125°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C
Core Material	Ferrite	Ferrite	Iron	Iron	Iron	Iron
Shielding	Shielded	Shielded	Shielded	Shielded	Shielded	Unshielded
Type	Drum Core, Wirewound	Molded	Molded	Molded	Molded	Military, MIL-PRF-39010/02
Mounting	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package	Axial	Axial	Axial	Axial	Axial	Axial
Size	0.162" Dia x 0.410" L	0.162" Dia x 0.410" L	0.162" Dia x 0.410" L	0.162" Dia x 0.410" L	0.162" Dia x 0.410" L	0.162" Dia x 0.410" L
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant
Packaging Option	Bulk	Bulk	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT)

Engineering Selection Recommendations

For RoHS3 Compliance Requirements: Select Bourns 9250A-472-RC. This part maintains identical electrical specifications to the original 9250-472 while providing RoHS3 compliance certification and active product status. The extended operating temperature range (-55°C to 125°C) offers additional thermal margin.

For Non-Compliance Applications or Military Specifications: API Delevan ER1641-472KR meets MIL-PRF-39010/02 military specifications with active product status. This part is available in Cut Tape packaging and provides the highest inventory availability (1818 pcs). Note: ER1641-472KR features unshielded construction, which differs from the shielded original specification.

For Shielded Configuration with Active Status: API Delevan ER1641-472KM and ER1641-472KP maintain shielded construction with active product status. Both are available in Tape & Reel packaging. ER1641-472KM provides higher inventory (1037 pcs) compared to ER1641-472KP (917 pcs).

For Slightly Higher Current Margin: API Delevan 1641R-472K offers 390 mA current rating, providing 10 mA additional headroom above the original 380 mA specification. Available in bulk packaging with 1043 pcs inventory.

Frequently Asked Questions (FAQ)

Q: Can the Bourns 9250A-472-RC directly replace the obsolete 9250-472? A: Yes. The 9250A-472-RC maintains all critical electrical parameters: 4.7 µH inductance, 380 mA current rating, 550 mOhm maximum DC resistance, 44 Q @ 7.9 MHz, and 70 MHz self-resonant frequency. Physical dimensions and mounting type are identical. The primary differences are molded construction (versus drum core), extended temperature range, and RoHS3 compliance.

Q: What is the difference between shielded and unshielded variants? A: Shielded inductors (9250-472, 9250A-472-RC, 1641R-472K, ER1641-472KM, ER1641-472KP) contain electromagnetic shielding to reduce radiated emissions and susceptibility to external magnetic fields. The ER1641-472KR is unshielded and suitable only for applications where EMI containment is not required.

Q: Are API Delevan parts electrically equivalent to Bourns parts? A: Yes, within the specified parameters. All API Delevan ER1641 and 1641R series parts meet the 4.7 µH inductance, ±10% tolerance, 380-390 mA current rating, and 550 mOhm DC resistance specifications. Core material differs (iron versus ferrite), but electrical performance at the specified test frequency (7.9 MHz) is equivalent.

Q: What packaging options are available? A: Bourns 9250A-472-RC is supplied in Bulk packaging. API Delevan offers three options: Bulk (1641R-472K), Tape & Reel (ER1641-472KM, ER1641-472KP), and Cut Tape (ER1641-472KR). Selection depends on assembly process requirements and order quantity.

Q: Does the extended temperature range of 9250A-472-RC affect compatibility? A: No. The extended range (-55°C to 125°C versus -55°C to 105°C) is a superset of the original specification and provides additional operational margin without affecting electrical performance within the original temperature window.

Q: Which part has the best availability? A: ER1641-472KR (API Delevan) has the highest inventory at 1818 pcs. However, this part is unshielded. For shielded equivalents, ER1641-472KM provides 1037 pcs availability.

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