SPD127-154M Equivalent & Substitute Parts

Part Overview

The SPD127-154M is a 150 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 1.4 A continuous current with a maximum DC resistance of 320mOhm. This component operates across an industrial temperature range of -55°C to 125°C and is mounted as a surface-mount device in a nonstandard 12.00mm × 12.00mm package.

The SPD127-154M has been classified as obsolete, which necessitates identification of functionally equivalent alternatives. The substitute parts listed below maintain the critical electrical specifications—150 µH inductance at matching current ratings—while offering active product status and improved availability.

Substiute Parts

SPD127-154M

API Delevan Inc.In Stock: 1129SPD127-154M Datasheet

Current PartRFQ

HRSPD127-154M

API Delevan Inc.In Stock: 1045HRSPD127-154M Datasheet

DirectRFQ

SRR1208-151KL

Bourns Inc.In Stock: 1842SRR1208-151KL Datasheet

SimilarRFQ

SRR1208-151YL

Bourns Inc.In Stock: 1498SRR1208-151YL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SPD127-154M are identified based on alignment with the following critical electrical and mechanical parameters:

• Inductance Value: Exact match at 150 µH
• Current Rating: Minimum 1.3 A (SPD127-154M rated at 1.4 A)
• DC Resistance: ≤320mOhm (lower resistance acceptable)
• Shielding: Shielded construction required
• Core Material: Ferrite core
• Mounting: Surface-mount technology
• Package Dimensions: Nonstandard form factor with compatible height envelope

The substitute parts are classified into two categories: a direct manufacturer equivalent (HRSPD127-154M from API Delevan Inc.) and similar alternatives (SRR1208 series from Bourns Inc.) that satisfy all electrical requirements within specified tolerances.

Parameter Comparison

Engineering Selection Recommendations

HRSPD127-154M is the primary substitute, manufactured by API Delevan Inc. as the active production equivalent to the obsolete SPD127-154M. This part maintains identical electrical specifications (150 µH, 1.4 A, ±20% tolerance) with improved DC resistance performance (294mOhm vs. 320mOhm). Extended operating temperature range (-55°C to 130°C vs. -55°C to 125°C) provides additional thermal margin. Product status is active with established supply chains.

SRR1208-151KL and SRR1208-151YL (Bourns Inc., SRR1208 series) are qualified alternatives that satisfy all critical electrical parameters. These parts feature superior inductance tolerance (±10% and ±15% respectively), lower DC resistance (240mOhm), and higher saturation current (1.72 A). Both are RoHS3 compliant, addressing environmental regulatory requirements. Current rating is 1.3 A, which is within the operational envelope for designs requiring the full 1.4 A capacity of the original part but suitable for applications rated to 1.3 A continuous current.

Selection between SRR1208-151KL (Tape & Reel) and SRR1208-151YL (Cut Tape & Digi-Reel®) depends on assembly and procurement requirements. Dimensional compatibility must be confirmed for designs with tight board space constraints, as package height varies slightly (SRR1208 at 8.50mm vs. SPD127-154M at 8.00mm).

Frequently Asked Questions (FAQ)

Q: Can HRSPD127-154M directly replace SPD127-154M in all applications?

A: Yes. HRSPD127-154M maintains all critical electrical specifications (150 µH inductance, 1.4 A current rating, ±20% tolerance, 320mOhm maximum DCR) required for functional equivalence. Physical dimensions are within 0.1mm variation, permitting drop-in replacement in standard PCB designs. HRSPD127-154M carries active product status with documented supply availability.

Q: What are the key differences between API Delevan and Bourns equivalents?

A: HRSPD127-154M (API Delevan) maintains exact electrical specifications with identical current rating (1.4 A). SRR1208 series (Bourns) provides improved performance characteristics: lower DC resistance (240mOhm vs. 294-320mOhm), tighter inductance tolerance (±10-15% vs. ±20%), and higher saturation current (1.72 A vs. 1.4 A). Current rating for SRR1208 is specified at 1.3 A; design review is required if the original specification demands 1.4 A continuous operation.

Q: Are there RoHS compliance implications?

A: SPD127-154M and HRSPD127-154M are both RoHS non-compliant. SRR1208-151KL and SRR1208-151YL are RoHS3 compliant. For applications subject to RoHS directives or customer environmental specifications, Bourns SRR1208 series components are the appropriate selection.

Q: Which packaging format should be selected for production?

A: SRR1208-151KL is supplied in Tape & Reel (TR) format, suited for automated high-volume assembly operations. SRR1208-151YL is available in Cut Tape (CT) and Digi-Reel® options, suitable for mixed-volume or manual pick-and-place assembly. Procurement volume and assembly equipment capabilities determine the optimal packaging selection.

Q: Can SRR1208 parts be used where 1.4 A continuous current is required?

A: SRR1208 current rating is specified at 1.3 A continuous. Designs requiring 1.4 A operation should verify that actual load conditions do not exceed 1.3 A continuous current. Saturation current (1.72 A for SRR1208) differs from continuous current rating. Circuit thermal analysis is required to confirm compliance when substituting with lower continuous-current-rated components.

Q: What dimensional considerations apply for PCB layout?

A: SPD127-154M package height is 8.00mm. HRSPD127-154M height is 9.02mm (1.02mm taller). SRR1208 series height is 8.50mm (0.50mm taller). All parts maintain compatible planar dimensions (approximately 12mm × 12mm). PCB clearance design must accommodate the maximum height of HRSPD127-154M. If board space is severely constrained, confirm actual component envelope during design validation.

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