47220SC Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 47220SC is a 22 µH shielded wirewound inductor rated for 2.7 A with a maximum DC resistance of 62.9mOhm. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The part operates across a temperature range of -40°C to 85°C and is RoHS compliant with unlimited moisture sensitivity rating.

Key Parameters

Parameter	Value
Inductance	22 µH
Inductance Tolerance	±20%
Current Rating	2.7 A
DC Resistance (DCR)	62.9mOhm Max
Shielding	Shielded
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package Type	Nonstandard, 4 Lead
Size	12.20mm x 12.20mm x 5.00mm (Max)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the 47220SC is determined by the following critical parameters:

Inductance Value: All substitutes must maintain 22 µH ±20% tolerance
Current Rating: Substitute parts must support minimum 2.7 A operation
DC Resistance: Lower DCR values improve efficiency; substitutes range from 36mOhm to 95mOhm
Shielding: All substitutes maintain shielded construction
Mounting: Surface mount configuration consistent across all alternatives
Package Footprint: Nonstandard packages with similar dimensional envelopes (12.00mm to 12.70mm square)
Temperature Range: Substitutes operate at -40°C minimum; upper range extends to 125°C for active parts
Compliance: All substitutes are RoHS3 compliant and REACH unaffected

Parameter Comparison

Parameter	47220SC (Murata)	744771122 (Würth)	BPSC00131345220M00 (Pulse)	BPSC00131345220T00 (Pulse)	SRR1205-220ML (Bourns)
Inductance	22 µH	22 µH	22 µH	22 µH	22 µH
Inductance Tolerance	±20%	±20%	±20%	±30%	±20%
Current Rating (Amps)	2.7 A	3.37 A	—	—	2.4 A
Current - Saturation (Isat)	—	3.77 A	4.6 A	4.6 A	4.6 A
DC Resistance (DCR)	62.9mOhm Max	36mOhm Max	66mOhm Max	66mOhm Max	95mOhm Max
Shielding	Shielded	Shielded	Shielded	Shielded	Shielded
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	Nonstandard, 4 Lead	Nonstandard	Nonstandard	Nonstandard	Nonstandard
Size (L x W)	12.20mm x 12.20mm	12.00mm x 12.00mm	12.50mm x 12.50mm	12.50mm x 12.50mm	12.70mm x 12.70mm
Height - Seated (Max)	5.00mm	6.00mm	4.50mm	4.50mm	5.50mm
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute: Würth Elektronik 744771122

The 744771122 offers the best electrical performance match with 3.37 A current rating, exceeding the 47220SC requirement. The 36mOhm DCR is significantly lower, reducing power dissipation. Extended temperature range to 125°C provides operational margin. Active product status ensures long-term availability. AEC-Q200 rating supports automotive applications.

Secondary Substitute: Pulse Electronics BPSC00131345220M00 or BPSC00131345220T00

Both Pulse variants maintain 22 µH inductance with 4.6 A saturation current. The BPSC00131345220M00 features ±20% tolerance matching the original specification. The BPSC00131345220T00 offers ±30% tolerance with identical electrical performance. Height of 4.50mm provides the most compact profile. Active status and ROHS3 compliance ensure supply continuity.

Tertiary Substitute: Bourns SRR1205-220ML

The SRR1205-220ML operates at 2.4 A, closest to the original 2.7 A rating. The 95mOhm DCR is higher than alternatives, resulting in increased power dissipation. Extended temperature range to 125°C and active product status support long-term deployment. Suitable for applications where current margin is not critical.

All substitutes are RoHS3 compliant, REACH unaffected, and maintain shielded construction with surface mount configuration.

Frequently Asked Questions (FAQ)

Q: Can the 744771122 directly replace the 47220SC?

A: Yes. Both components maintain 22 µH inductance at ±20% tolerance, shielded construction, and surface mount configuration. The 744771122 exceeds current rating requirements with 3.37 A versus 2.7 A, and provides lower DCR at 36mOhm. Extended temperature range to 125°C is compatible with applications designed for -40°C to 85°C operation.

Q: What is the impact of higher DC resistance in the SRR1205-220ML?

A: The SRR1205-220ML exhibits 95mOhm DCR compared to 62.9mOhm in the original part. At 2.7 A operation, this results in approximately 0.51 W additional power dissipation (I²R loss). Thermal management and circuit efficiency must be evaluated for applications sensitive to inductor losses.

Q: Are the Pulse Electronics variants interchangeable?

A: The BPSC00131345220M00 and BPSC00131345220T00 are electrically equivalent with identical current ratings, DCR, and saturation characteristics. The primary difference is inductance tolerance: ±20% for the M00 variant and ±30% for the T00 variant. Selection depends on circuit tolerance requirements.

Q: Do package dimension differences affect PCB layout?

A: All substitutes maintain similar footprints within 12.00mm to 12.70mm square dimensions. Height variations range from 4.50mm to 6.00mm. PCB clearance and thermal management considerations may require layout verification, particularly for the taller 744771122 at 6.00mm maximum height.

Q: Is temperature range extension from 85°C to 125°C significant?

A: The extended upper temperature limit in active substitutes provides operational margin for high-ambient or high-power applications. Designs operating within the original -40°C to 85°C specification are fully compatible with substitutes rated to 125°C.

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