SPD127R-824M Equivalent & Substitute Parts

Part Overview

The SPD127R-824M is an 820 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., designed for surface mount applications with a current rating of 650 mA and maximum DC resistance of 1.4 Ohm. This component is classified as Active product status and is ROHS3 compliant. Substitute parts may be required due to inventory constraints, lead time considerations, or specific application requirements where alternative electrical or mechanical parameters are acceptable within design tolerances.

Substiute Parts

SPD127R-824M

API Delevan Inc.In Stock: 1090SPD127R-824M Datasheet

Current PartRFQ

SRR1208-821KL

Bourns Inc.In Stock: 1477SRR1208-821KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPD127R-824M is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 820 µH (exact match required)
• Core type: Ferrite shielded drum core wirewound
• Mounting type: Surface Mount
• Shielding: Shielded configuration

Secondary Compatibility Factors:

• Current rating: Substitute must support minimum 550 mA (acceptable if lower than main part, provided application requirements are met)
• DC resistance: Substitute DCR of 1.15 Ohm is acceptable within circuit design margins
• Tolerance: ±10% tolerance on substitute is tighter than ±20% on main part
• Operating temperature range: Substitute range of -40°C ~ 125°C covers primary operating window
• Package dimensions: Nonstandard packages with similar footprint (12.70mm x 12.70mm) are mechanically compatible with minor PCB layout adjustment

The SRR1208-821KL from Bourns Inc. meets all primary matching criteria and demonstrates acceptable secondary compatibility parameters for equivalent substitution.

Parameter Comparison

Engineering Selection Recommendations

SPD127R-824M Selection Criteria:

• Primary choice when application requires 650 mA continuous current rating
• Preferred for extended low-temperature operation below -40°C
• Suitable when maximum operating temperature range of -55°C ~ 125°C is specified
• Recommended when PCB layout is constrained to 12.00mm x 12.00mm footprint with 8.00mm maximum height

SRR1208-821KL Selection Criteria:

• Acceptable substitute when application current requirement does not exceed 550 mA continuous
• Preferred when lower DC resistance (1.15 Ohm vs 1.4 Ohm) reduces power dissipation requirements
• Suitable when operating temperature range of -40°C ~ 125°C meets application specifications
• Compatible when PCB layout accommodates 12.70mm x 12.70mm footprint with 8.50mm maximum height
• Tighter inductance tolerance (±10%) provides improved circuit performance in precision applications

Both components maintain ROHS3 compliance, MSL Level 1 rating, and Active product status, ensuring long-term availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can SRR1208-821KL directly replace SPD127R-824M in all applications?

A: Direct replacement is possible only when application current requirements do not exceed 550 mA continuous and operating temperature range does not require operation below -40°C. PCB layout must accommodate the larger 12.70mm x 12.70mm footprint and 8.50mm height. Verify these parameters against your circuit design specifications before substitution.

Q: What is the impact of the 100 mA current rating difference?

A: The SPD127R-824M is rated for 650 mA continuous current, while the SRR1208-821KL is rated for 550 mA. If your application operates at or above 550 mA, the SPD127R-824M is required. If application current remains below 550 mA, the SRR1208-821KL is electrically equivalent. The SRR1208-821KL has a saturation current (Isat) of 770 mA, providing margin above its continuous rating.

Q: How do the DC resistance values affect circuit performance?

A: The SRR1208-821KL has lower DC resistance (1.15 Ohm Max vs 1.4 Ohm Max), resulting in reduced power dissipation and lower voltage drop across the inductor. This can improve circuit efficiency. However, the difference of 0.25 Ohm maximum is typically negligible in most applications unless the circuit operates at maximum current continuously.

Q: Are there temperature range limitations with the substitute part?

A: The SRR1208-821KL operates from -40°C to 125°C, while the SPD127R-824M operates from -55°C to 125°C. If your application requires operation below -40°C, the SPD127R-824M must be used. Both parts support the standard industrial temperature range of -40°C to 125°C.

Q: What are the mechanical compatibility considerations?

A: The SRR1208-821KL has a slightly larger footprint (12.70mm x 12.70mm vs 12.00mm x 12.00mm) and greater height (8.50mm vs 8.00mm). PCB layout must be verified to ensure the substitute component does not interfere with adjacent components or violate clearance requirements. Both components use Tape & Reel (TR) packaging for automated assembly.

Q: Do both parts have identical inductance tolerance?

A: No. The SPD127R-824M has ±20% tolerance, while the SRR1208-821KL has ±10% tolerance. The tighter tolerance of the substitute part provides more precise inductance values, which may improve circuit performance in applications sensitive to inductance variation.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both SPD127R-824M and SRR1208-821KL are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.