SCRH127B-821 Equivalent & Substitute Parts

Part Overview

The SCRH127B-821 is a 820 µH shielded inductor manufactured by Signal Transformer, rated for 680 mA continuous current with a maximum DC resistance of 1.64Ohm. This surface mount component operates across the industrial temperature range of -40°C to 125°C and is ROHS3 compliant. The part is currently active in production with 951 units in stock.

Substitute parts are identified when electrical and mechanical parameters align within the specified tolerances and operational requirements of the original component, enabling direct replacement in circuit applications without design modification.

Substiute Parts

SCRH127B-821

Signal TransformerIn Stock: 1049SCRH127B-821 Datasheet

Current PartRFQ

DR127-821-R

Eaton - Electronics DivisionIn Stock: 1212DR127-821-R Datasheet

MFR RecommendedRFQ

DRA127-821-R

Eaton - Electronics DivisionIn Stock: 859DRA127-821-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCRH127B-821 is determined by the following critical parameters:

Inductance Value: 820 µH ±20% tolerance Current Rating: Minimum 680 mA continuous current capability DC Resistance: Maximum 1.64Ohm to maintain circuit performance Shielding: Shielded construction required Package Dimensions: 12.50mm x 12.50mm footprint with 8.00mm maximum height Mounting: Surface mount configuration Temperature Range: Minimum -40°C to 125°C operating window Compliance: ROHS3 compliant

The identified substitute parts DR127-821-R and DRA127-821-R meet these core electrical and mechanical requirements, enabling functional equivalence in the target application.

Parameter Comparison

Engineering Selection Recommendations

Both DR127-821-R and DRA127-821-R are active production components from Eaton - Electronics Division with ROHS3 compliance and unlimited moisture sensitivity ratings, matching the regulatory and environmental requirements of the SCRH127B-821.

DR127-821-R features a drum core wirewound construction with ferrite material and supports a saturation current of 1.27A, providing margin above the 680 mA rating requirement.

DRA127-821-R is a wirewound inductor with AEC-Q200 automotive qualification and an extended operating temperature range to 165°C, offering enhanced thermal performance for applications requiring elevated temperature operation within the -40°C to 165°C window.

Both substitutes maintain DC resistance values below the 1.64Ohm maximum specification and preserve the identical 12.50mm x 12.50mm footprint and 8.00mm height for direct PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can DR127-821-R or DRA127-821-R be used as direct replacements for SCRH127B-821?

A: Yes. Both parts meet the core electrical parameters: 820 µH inductance at ±20% tolerance, shielded construction, surface mount configuration, identical package footprint (12.50mm x 12.50mm x 8.00mm), and ROHS3 compliance. DC resistance values for both substitutes are lower than the 1.64Ohm maximum specification.

Q: What is the difference in current rating between the main part and substitutes?

A: SCRH127B-821 is rated for 680 mA continuous current. DR127-821-R supports 650 mA, and DRA127-821-R supports 637 mA. For applications operating at or near 680 mA, verify that the substitute's saturation current (Isat) provides adequate margin. DR127-821-R has Isat of 1.27A and DRA127-821-R has Isat of 1.22A.

Q: Are there temperature range differences?

A: SCRH127B-821 and DR127-821-R both operate from -40°C to 125°C. DRA127-821-R extends the upper limit to 165°C, suitable for high-temperature applications.

Q: Do the substitutes maintain the same DC resistance?

A: DR127-821-R has 1.47Ohm DCR and DRA127-821-R has 1.54Ohm DCR, both lower than the 1.64Ohm maximum of SCRH127B-821. Lower resistance reduces power dissipation in the inductor.

Q: Are packaging and moisture sensitivity identical?

A: Yes. All three parts use tape and reel packaging, share identical surface mount footprints and heights, and carry MSL rating 1 (Unlimited), indicating no moisture sensitivity restrictions.