SPD73R-823M Equivalent & Substitute Parts

Part Overview

The SPD73R-823M is a 82 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., designed for surface mount applications with a current rating of 950 mA and maximum DC resistance of 690 mOhm. 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 characteristics are acceptable within design tolerances.

Substiute Parts

SPD73R-823M

API Delevan Inc.In Stock: 855SPD73R-823M Datasheet

Current PartRFQ

SRR0745A-820M

Bourns Inc.In Stock: 1926SRR0745A-820M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPD73R-823M with the SRR0745A-820M is based on the following alignment of critical parameters:

Matching Parameters:

• Inductance value: 82 µH (identical)
• Inductance tolerance: ±20% (identical)
• Core material: Ferrite (identical)
• Shielding: Shielded (identical)
• Mounting type: Surface Mount (identical)
• Package type: Tape & Reel (TR) (identical)
• Physical footprint: 0.287" L x 0.287" W / 7.30mm x 7.30mm (identical)
• Inductance test frequency: 1 kHz (identical)
• RoHS compliance: ROHS3 Compliant (identical)
• Moisture sensitivity: MSL 1 (Unlimited) (identical)

Differing Parameters:

• Current rating: 950 mA (SPD73R-823M) vs. 780 mA (SRR0745A-820M)
• DC resistance: 690 mOhm max (SPD73R-823M) vs. 400 mOhm max (SRR0745A-820M)
• Saturation current: 950 mA (SPD73R-823M) vs. 900 mA (SRR0745A-820M)
• Height: 0.154" / 3.90mm (SPD73R-823M) vs. 0.185" / 4.70mm (SRR0745A-820M)
• Operating temperature: -55°C to 125°C (SPD73R-823M) vs. -40°C to 125°C (SRR0745A-820M)

The SRR0745A-820M is suitable as a substitute when the application current requirement does not exceed 780 mA and the lower DC resistance of 400 mOhm is acceptable or beneficial.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: SPD73R-823M

The SPD73R-823M is the specified component and should be used when:

• Application current requirements reach or exceed 780 mA
• Operating temperature must extend to -55°C
• PCB height constraints require the lower profile (3.90mm maximum seated height)
• DC resistance specification of 690 mOhm maximum is acceptable

Substitute Part: SRR0745A-820M

The SRR0745A-820M (Bourns Inc.) is an acceptable substitute when:

• Application current does not exceed 780 mA
• Operating temperature range of -40°C to 125°C is sufficient
• PCB height can accommodate 4.70mm maximum seated height
• Lower DC resistance of 400 mOhm is compatible with circuit design
• AEC-Q200 automotive qualification is required

Both parts maintain identical inductance value, tolerance, core material, shielding, footprint, and compliance certifications. Selection between these parts depends on current rating requirements, temperature range, physical height constraints, and DC resistance specifications of the target application.

Frequently Asked Questions (FAQ)

Q: Can the SRR0745A-820M replace the SPD73R-823M in all applications?

A: No. The SRR0745A-820M has a lower current rating of 780 mA compared to the SPD73R-823M's 950 mA rating. Substitution is only valid when the application current requirement does not exceed 780 mA. Additionally, the SRR0745A-820M has a narrower operating temperature range (-40°C to 125°C versus -55°C to 125°C) and greater seated height (4.70mm versus 3.90mm).

Q: Are the physical footprints identical?

A: The lateral footprints are identical at 0.287" x 0.287" (7.30mm x 7.30mm). However, the seated heights differ: SPD73R-823M is 3.90mm maximum, while SRR0745A-820M is 4.70mm maximum. PCB layout and clearance requirements must account for this 0.80mm height difference.

Q: What is the significance of the DC resistance difference?

A: The SPD73R-823M has a maximum DC resistance of 690 mOhm, while the SRR0745A-820M has 400 mOhm. Lower DC resistance reduces power dissipation and heat generation. The SRR0745A-820M's lower resistance may be beneficial in power-sensitive applications but does not affect inductance value or frequency response.

Q: Are both parts RoHS compliant?

A: Yes. Both the SPD73R-823M and SRR0745A-820M are ROHS3 compliant and have MSL 1 (Unlimited) moisture sensitivity ratings, making them suitable for standard manufacturing and storage conditions.

Q: What is the saturation current difference?

A: The SPD73R-823M has a saturation current of 950 mA, matching its current rating. The SRR0745A-820M has a saturation current of 900 mA, which is higher than its 780 mA current rating. This provides margin before saturation occurs in the substitute part.

Q: Does the SRR0745A-820M have automotive qualification?

A: Yes. The SRR0745A-820M carries AEC-Q200 qualification, indicating suitability for automotive applications. The SPD73R-823M does not list this certification in the provided specifications.