SCRH64B-330 Equivalent & Substitute Parts

Part Overview

The SCRH64B-330 is a 33 µH shielded inductor manufactured by Signal Transformer, rated for 740 mA with a maximum DC resistance of 330mOhm. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The part is surface-mounted in a nonstandard package measuring 6.50mm × 6.40mm with a maximum seated height of 5.20mm, suitable for applications requiring shielded inductive filtering in the 33 µH range.

Substiute Parts

SCRH64B-330

Signal TransformerIn Stock: 1108SCRH64B-330 Datasheet

Current PartRFQ

7447785133

Würth ElektronikIn Stock: 9977447785133 Datasheet

MFR RecommendedRFQ

CDRH64BNP-330MC-B

Sumida America Components Inc.In Stock: 1136CDRH64BNP-330MC-B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCRH64B-330 is determined by the following critical parameters:

• Inductance Value: Must be 33 µH
• Inductance Tolerance: ±20% or tighter
• Current Rating: Minimum 740 mA
• DC Resistance: Maximum 330mOhm
• Shielding: Shielded construction required
• Mounting Type: Surface Mount
• Operating Temperature: Must support -40°C ~ 125°C range
• Compliance: ROHS3 compliant, MSL 1

Two substitute parts meet these criteria: the Würth Elektronik 7447785133 and the Sumida America Components Inc. CDRH64BNP-330MC-B. Both maintain the core electrical specifications while offering active product status and enhanced availability.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are active products with ROHS3 compliance and MSL 1 ratings, providing long-term procurement stability compared to the obsolete SCRH64B-330.

CDRH64BNP-330MC-B (Sumida) provides the closest electrical match with identical inductance tolerance (±20%) and DC resistance specification (330mOhm Max). Current rating of 750 mA exceeds the original 740 mA requirement. Operating temperature range extends to 100°C, which is 25°C lower than the original specification at the upper limit.

7447785133 (Würth Elektronik) offers the highest current rating at 850 mA and maintains full -40°C ~ 125°C operating temperature range. DC resistance is specified at 400mOhm Max, representing a 70mOhm increase over the original. Inductance tolerance is ±25%, compared to ±20% for the original. This part includes AEC-Q200 automotive qualification and features a lower profile at 3.30mm seated height versus 5.20mm for the original.

Frequently Asked Questions (FAQ)

Q: Can the CDRH64BNP-330MC-B be used as a direct replacement?

A: Yes. The CDRH64BNP-330MC-B maintains identical inductance value, tolerance, and DC resistance specifications. Current rating of 750 mA exceeds the original 740 mA requirement. The operating temperature range is -40°C ~ 100°C, which covers the original specification except at temperatures above 100°C.

Q: What is the key difference between the two substitute parts?

A: The Würth 7447785133 provides higher current capacity (850 mA) and full temperature range (-40°C ~ 125°C) but has increased DC resistance (400mOhm vs. 330mOhm). The Sumida CDRH64BNP-330MC-B matches the original DC resistance and tolerance specifications but operates to 100°C maximum.

Q: Are both substitutes available in the same package format?

A: Both substitute parts are supplied in Tape & Reel (TR) packaging. Physical dimensions differ slightly: Würth measures 6.20mm × 5.90mm with 3.30mm height; Sumida measures 6.20mm × 5.90mm with 5.00mm height. The original SCRH64B-330 measures 6.50mm × 6.40mm with 5.20mm height.

Q: Do the substitutes maintain compliance certifications?

A: Both substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's compliance profile. The Würth part includes AEC-Q200 automotive qualification, which was not specified for the original.

Q: Which substitute should be selected for high-temperature applications?

A: For applications requiring operation above 100°C, the Würth Elektronik 7447785133 is the appropriate choice, as it maintains the full -40°C ~ 125°C operating range of the original part.