SCRH124B-470 Equivalent & Substitute Parts

Part Overview

The SCRH124B-470 is a 47 µH shielded inductor manufactured by Signal Transformer, rated for 1.87 A continuous current with a maximum DC resistance of 170mOhm. 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 1114 units in stock.

Equivalent and substitute parts are identified when design requirements permit tolerance in specific electrical or mechanical parameters while maintaining core functional performance in 47 µH inductance applications.

Substiute Parts

SCRH124B-470

Signal TransformerIn Stock: 1128SCRH124B-470 Datasheet

Current PartRFQ

DRA124-470-R

Eaton - Electronics DivisionIn Stock: 1276DRA124-470-R Datasheet

MFR RecommendedRFQ

UP2B-470-R

Eaton - Electronics DivisionIn Stock: 1340UP2B-470-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCRH124B-470 is determined by the following criteria:

Primary Matching Parameters:

• Inductance value: 47 µH (fixed requirement)
• Inductance tolerance: ±20% (fixed requirement)
• Mounting type: Surface Mount (fixed requirement)
• Inductance test frequency: 100 kHz (fixed requirement)

Allowable Variation Parameters:

• Current rating: Substitute must meet or exceed 1.87 A minimum
• DC resistance: Substitute must not exceed 170mOhm maximum
• Saturation current: Substitute must support application requirements
• Shielding: Shielded configuration required for EMI-sensitive applications
• Operating temperature: Substitute must cover minimum -40°C to 125°C range
• Package dimensions: Nonstandard packages with compatible footprints
• RoHS compliance: ROHS3 compliance required

Two substitute parts meet these criteria:

DRA124-470-R (Eaton - Electronics Division): Shielded wirewound inductor with 1.78 A rating and 134mOhm DCR. Exceeds temperature range to 165°C and includes AEC-Q200 automotive qualification.

UP2B-470-R (Eaton - Electronics Division): Unshielded drum core wirewound inductor with 1.7 A rating and 138.8mOhm DCR. Operates to 85°C maximum and features ferrite core construction.

Parameter Comparison

Engineering Selection Recommendations

DRA124-470-R Selection Criteria:

• Preferred for applications requiring extended temperature operation beyond 125°C, up to 165°C maximum
• Suitable for automotive and harsh environment applications due to AEC-Q200 qualification
• Lower DC resistance (134mOhm) reduces power dissipation compared to the main part
• Maintains shielded configuration for EMI-sensitive circuit designs
• Identical footprint dimensions (12.50 x 12.50 mm) with reduced height (4.50 mm vs 4.80 mm)
• All three parts are active production items with current inventory availability

UP2B-470-R Selection Criteria:

• Applicable only when operating temperature does not exceed 85°C maximum
• Unshielded configuration requires circuit-level EMI assessment
• Lower DC resistance (138.8mOhm) provides improved efficiency
• Ferrite core construction differs from the main part
• Larger footprint (13.97 x 10.41 mm) and increased height (6.00 mm) require PCB layout verification
• Not suitable for applications requiring the full -40°C to 125°C temperature range

All three parts maintain ROHS3 compliance, MSL Level 1 rating, and surface mount assembly compatibility.

Frequently Asked Questions (FAQ)

Q: Can DRA124-470-R replace SCRH124B-470 in all applications?

A: DRA124-470-R is compatible when the application operates within -40°C to 165°C and does not require the specific core material or winding characteristics of the original part. The shielded configuration, inductance value, tolerance, and current rating are equivalent. Verify PCB layout accommodates the 4.50 mm seated height.

Q: What is the primary difference between DRA124-470-R and UP2B-470-R?

A: DRA124-470-R is shielded with extended temperature range to 165°C, while UP2B-470-R is unshielded with maximum temperature of 85°C. UP2B-470-R uses ferrite drum core construction and has larger physical dimensions. Selection depends on EMI requirements and operating temperature specifications.

Q: Is UP2B-470-R suitable for the full operating temperature range of SCRH124B-470?

A: No. UP2B-470-R operates only to 85°C maximum, which does not cover the full -40°C to 125°C range of the main part. Use UP2B-470-R only when application temperature remains below 85°C.

Q: How do DC resistance values affect substitution?

A: Lower DC resistance reduces power dissipation and heat generation. DRA124-470-R (134mOhm) and UP2B-470-R (138.8mOhm) both provide lower resistance than SCRH124B-470 (170mOhm maximum). This is beneficial for efficiency but does not affect functional substitution eligibility.

Q: Are all three parts available in the same packaging format?

A: Yes. All three parts are supplied in Tape & Reel (TR) packaging with MSL Level 1 (Unlimited) moisture sensitivity rating, suitable for standard surface mount assembly processes.

Q: What does shielding mean for inductor substitution?

A: Shielding reduces electromagnetic interference (EMI) radiation from the inductor. SCRH124B-470 and DRA124-470-R are both shielded. UP2B-470-R is unshielded and may introduce EMI in sensitive circuits. Shielding is a critical parameter when EMI performance is specified.

Q: Can saturation current differences affect substitution?

A: Saturation current indicates the current level at which inductance begins to degrade. DRA124-470-R (2.91 A) has higher saturation margin than SCRH124B-470 (1.9 A), providing additional design margin. UP2B-470-R (1.4 A) has lower saturation current and requires verification that application current does not exceed this threshold.