MBH7045C-221MB=P3 Equivalent & Substitute Parts

Part Overview

The MBH7045C-221MB=P3 is a 220 µH shielded drum core wirewound inductor manufactured by Murata Electronics, rated for 550 mA continuous current with a maximum DC resistance of 828 mOhm. This surface mount component is designed for applications requiring stable inductance at 100 kHz test frequency with ferrite core construction and AEC-Q200 qualification.

The MBH7045C series has reached obsolete product status. Identifying qualified substitute inductors with equivalent electrical and mechanical characteristics is essential for design continuity and procurement planning.

Key Parameters

Parameter	Value
Inductance	220 µH
Tolerance	±20%
Current Rating	550 mA
Current - Saturation (Isat)	560 mA
DC Resistance (DCR)	828 mOhm Max
Core Material	Ferrite
Shielding	Shielded
Mounting Type	Surface Mount
Package Type	Nonstandard
Size	7.20mm x 7.20mm x 4.80mm (Max Height)
Inductance Test Frequency	100 kHz
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)
AEC-Q200	Qualified

Substitute Part Grouping Explanation

The CLF7045NIT-221M-D from TDK Corporation qualifies as a direct substitute based on the following alignment of critical parameters:

Electrical Equivalence:

Identical inductance value: 220 µH at 100 kHz test frequency
Matching inductance tolerance: ±20%
Compatible current rating: 560 mA (exceeds minimum 550 mA requirement)
Saturation current: 560 mA (matches specification)
DC resistance within acceptable range: 660 mOhm Max (lower than 828 mOhm maximum)

Mechanical & Construction Equivalence:

Identical core type: Ferrite drum core, wirewound
Matching shielding: Shielded construction
Compatible mounting: Surface mount
Package type: Nonstandard (equivalent form factor)
Physical dimensions: 7.40mm x 7.00mm x 4.80mm (Max Height) — within acceptable tolerance for nonstandard packages
Moisture sensitivity: MSL 1 (Unlimited)

Compliance & Quality:

AEC-Q200 qualified (automotive grade)
ROHS3 compliant
Active product status ensures ongoing availability

Parameter Comparison

Parameter	MBH7045C-221MB=P3 (Murata)	CLF7045NIT-221M-D (TDK)
Manufacturer	Murata Electronics	TDK Corporation
Inductance	220 µH	220 µH
Tolerance	±20%	±20%
Current Rating (Amps)	550 mA	560 mA
Current - Saturation (Isat)	560 mA	560 mA
DC Resistance (DCR) Max	828 mOhm	660 mOhm
Core Material	Ferrite	Ferrite
Shielding	Shielded	Shielded
Mounting Type	Surface Mount	Surface Mount
Package Type	Nonstandard	Nonstandard
Size / Dimension	7.20mm x 7.20mm	7.40mm x 7.00mm
Height - Seated (Max)	4.80mm	4.80mm
Inductance Test Frequency	100 kHz	100 kHz
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)
AEC-Q200	Qualified	Qualified
Product Status	Obsolete	Active
Operating Temperature	Not specified	-55°C ~ 150°C

Engineering Selection Recommendations

The CLF7045NIT-221M-D is a qualified direct substitute for the obsolete MBH7045C-221MB=P3. Selection is supported by:

Product Status: The substitute part maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete original.

Electrical Performance: The substitute meets or exceeds all specified electrical parameters. The lower DC resistance (660 mOhm vs. 828 mOhm maximum) provides improved efficiency with reduced power dissipation in the same current range.

Compliance & Certification: Both parts carry AEC-Q200 automotive qualification and ROHS3 compliance, maintaining the same quality and regulatory standards.

Physical Compatibility: Nonstandard package dimensions are within acceptable tolerance for PCB layout. The identical maximum seated height (4.80mm) ensures vertical clearance compatibility. Minor lateral dimension variations (7.40mm x 7.00mm vs. 7.20mm x 7.20mm) are typical for nonstandard packages and do not preclude direct substitution.

Moisture Handling: Identical MSL 1 rating confirms equivalent moisture sensitivity and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can the CLF7045NIT-221M-D replace the MBH7045C-221MB=P3 in existing designs?

A: Yes. The substitute part matches all critical electrical parameters (inductance, tolerance, current rating, saturation current) and maintains identical mechanical form factor and compliance certifications. The lower DC resistance is a performance advantage.

Q: Are there dimensional differences that affect PCB layout?

A: The substitute dimensions (7.40mm x 7.00mm) differ slightly from the original (7.20mm x 7.20mm), but both are nonstandard packages with identical maximum seated height (4.80mm). These minor variations are within acceptable tolerance for nonstandard component placement and do not require PCB redesign.

Q: What is the advantage of the lower DC resistance in the substitute part?

A: The CLF7045NIT-221M-D has a maximum DC resistance of 660 mOhm compared to 828 mOhm in the original. This reduces resistive losses and heat generation at the same current levels, improving overall circuit efficiency.

Q: Are both parts qualified for automotive applications?

A: Yes. Both the MBH7045C-221MB=P3 and CLF7045NIT-221M-D carry AEC-Q200 qualification, confirming suitability for automotive-grade applications.

Q: What is the operating temperature range for the substitute?

A: The CLF7045NIT-221M-D is rated for -55°C to 150°C. The original part's operating temperature range was not specified in the datasheet parameters.

Q: Are moisture sensitivity levels equivalent?

A: Yes. Both parts carry MSL 1 (Unlimited) rating, indicating identical moisture sensitivity and storage requirements.

Q: Is the substitute part currently in stock?

A: Yes. The CLF7045NIT-221M-D is an active product with 3,176 pieces available in inventory, compared to the obsolete MBH7045C-221MB=P3.

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