SDS850R-154M Equivalent & Substitute Parts

Part Overview

The SDS850R-154M is a 150 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 400 mA continuous current with a maximum DC resistance of 900 mOhm. This component is designed for surface mount applications in compact form factors measuring 10.50mm × 8.00mm.

The SDS850R-154M has reached obsolete product status. Identifying qualified substitute components ensures design continuity and supply chain reliability for applications requiring equivalent electrical and mechanical performance characteristics.

Key Parameters

Parameter	Value	Unit
Inductance	150	µH
Current Rating	400	mA
DC Resistance (Max)	900	mOhm
Core Material	Ferrite
Shielding	Shielded
Mounting Type	Surface Mount
Physical Dimensions (L × W)	10.50 × 8.00	mm
Height (Seated Max)	4.80	mm
Operating Temperature Range	-40 to 85	°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute components for the SDS850R-154M are qualified based on the following critical parameters:

Electrical Equivalence Criteria:

Inductance value: 150 µH (primary functional requirement)
Current rating: minimum 400 mA continuous
DC resistance: maximum 900 mOhm
Core material: Ferrite shielded construction
Shielding type: Shielded configuration

Mechanical Compatibility Criteria:

Mounting type: Surface mount
Physical footprint: 10.50mm × 8.00mm length and width
Height constraint: maximum 4.80mm seated height
Package type: Nonstandard drum core form factor

Environmental & Compliance Criteria:

Operating temperature range: minimum -40°C to 85°C
RoHS3 compliance required
Moisture sensitivity level: MSL 1 or better

Substitute parts must satisfy all electrical parameters while maintaining mechanical compatibility with the original PCB layout and assembly process.

Parameter Comparison

Parameter	SDS850R-154M (API Delevan)	SRR0805-151K (Bourns)	Compatibility
Inductance	150 µH	150 µH	Equivalent
Inductance Tolerance	±20%	±10%	Substitute tighter
Current Rating	400 mA	400 mA	Equivalent
DC Resistance (Max)	900 mOhm	900 mOhm	Equivalent
Core Material	Ferrite	Ferrite	Equivalent
Shielding	Shielded	Shielded	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Dimensions (L × W)	10.50 × 8.00 mm	10.50 × 8.00 mm	Equivalent
Height (Seated Max)	4.80 mm	4.70 mm	Compatible
Operating Temperature	-40 to 85°C	-40 to 125°C	Substitute wider range
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity	MSL 1	MSL 1	Equivalent
Product Status	Obsolete	Active	Substitute active

Engineering Selection Recommendations

The SRR0805-151K manufactured by Bourns Inc. qualifies as a direct substitute for the obsolete SDS850R-154M based on the following engineering criteria:

Electrical Performance: All critical electrical parameters match or exceed the original specification. The SRR0805-151K maintains identical inductance (150 µH), current rating (400 mA), and maximum DC resistance (900 mOhm). The substitute component features tighter inductance tolerance (±10% versus ±20%), which provides improved circuit performance consistency.

Mechanical Compatibility: Physical dimensions are identical (10.50mm × 8.00mm footprint), with seated height 0.10mm lower (4.70mm versus 4.80mm), ensuring direct PCB layout compatibility without redesign.

Compliance & Reliability: Both components maintain ROHS3 compliance and MSL 1 moisture sensitivity rating. The SRR0805-151K carries active product status with extended operating temperature range (-40°C to 125°C versus -40°C to 85°C), providing enhanced thermal margin for demanding applications.

Supply Chain: The SRR0805-151K is available in active production with documented inventory, eliminating obsolescence risk associated with the SDS850R-154M.

Frequently Asked Questions (FAQ)

Q: Can the SRR0805-151K be used as a direct replacement without PCB modification?

A: Yes. The SRR0805-151K maintains identical footprint dimensions (10.50mm × 8.00mm) and mounting type (surface mount). The 0.10mm reduction in seated height presents no compatibility issues for standard PCB assembly processes.

Q: What is the significance of the inductance tolerance difference?

A: The SRR0805-151K features ±10% tolerance compared to the SDS850R-154M's ±20% tolerance. This tighter tolerance reduces inductance variation across production batches, improving circuit performance consistency. Applications with strict inductance requirements benefit from this enhanced specification.

Q: Are there any thermal performance differences?

A: The SRR0805-151K operates across a wider temperature range (-40°C to 125°C) compared to the original part (-40°C to 85°C). Both components maintain identical current ratings and DC resistance specifications at their respective operating limits.

Q: What packaging format is the SRR0805-151K supplied in?

A: The SRR0805-151K is supplied in Tape & Reel (TR) packaging, standard for high-volume surface mount assembly operations. The original SDS850R-154M packaging format is not specified in available documentation.

Q: Do both components require identical PCB assembly handling procedures?

A: Yes. Both components share identical moisture sensitivity level (MSL 1) and RoHS3 compliance status. Standard surface mount assembly procedures for shielded drum core inductors apply to both parts without modification.

Q: Is the SRR0805-151K available for immediate procurement?

A: The SRR0805-151K maintains active product status with documented inventory availability, ensuring reliable supply for new designs and production requirements.

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