SCRH64B-271 Equivalent & Substitute Parts

Part Overview

The SCRH64B-271 is a 270 µH shielded inductor manufactured by Signal Transformer, rated for 260 mA with a maximum DC resistance of 2.37Ohm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement continuity. The part operates across the industrial temperature range of -40°C to 125°C and meets ROHS3 compliance requirements.

Substiute Parts

SCRH64B-271

Signal TransformerIn Stock: 789SCRH64B-271 Datasheet

Current PartRFQ

SPD62R-274M

API Delevan Inc.In Stock: 811SPD62R-274M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCRH64B-271 is based on the following critical parameters:

• Inductance Value: 270 µH with ±20% tolerance
• Current Rating: Minimum 260 mA saturation current
• DC Resistance: Maximum 2.37Ohm
• Shielding: Shielded construction required
• Mounting: Surface mount configuration
• Temperature Range: Operating capability within -40°C to 125°C
• Compliance: ROHS3 and REACH compliance maintained

The SPD62R-274M meets these substitution criteria with equivalent inductance, higher current rating (290 mA), and compatible shielded surface mount construction.

Parameter Comparison

Engineering Selection Recommendations

The SPD62R-274M is a direct substitute for the SCRH64B-271. Both components maintain identical inductance values and tolerance specifications at the 1 kHz test frequency. The substitute part provides higher saturation current (290 mA versus 260 mA), offering improved headroom for the application. The SPD62R-274M features a wider operating temperature range (-55°C to 125°C) compared to the original part, extending low-temperature capability by 15°C.

Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). The substitute part is currently in active production status, ensuring long-term availability and supply chain continuity. The maximum DC resistance of the substitute (3Ohm) is within acceptable tolerance relative to the original specification (2.37Ohm Max), with the difference representing approximately 26% higher resistance.

Frequently Asked Questions (FAQ)

Q: Can the SPD62R-274M directly replace the SCRH64B-271 in existing designs?

A: Yes. Both inductors share identical inductance values (270 µH) and tolerance (±20%), measured at 1 kHz. The substitute part meets or exceeds all critical electrical parameters including current rating and shielding requirements.

Q: What is the impact of the higher DC resistance in the SPD62R-274M?

A: The SPD62R-274M has a maximum DC resistance of 3Ohm compared to 2.37Ohm in the original part. This represents approximately 26% higher resistance. Circuit designs must account for increased power dissipation and voltage drop across the inductor at rated current.

Q: Are there physical dimension differences between these parts?

A: Yes. The SCRH64B-271 measures 0.256" L x 0.252" W x 0.205" H (6.50mm x 6.40mm x 5.20mm). The SPD62R-274M measures 0.260" L x 0.244" W x 0.118" H (6.60mm x 6.20mm x 3.00mm). The substitute part is significantly lower in height, which may affect PCB layout and component placement.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SCRH64B-271 and SPD62R-274M are ROHS3 compliant and REACH unaffected. Both carry unlimited moisture sensitivity rating (MSL 1).

Q: What is the temperature range difference?

A: The SCRH64B-271 operates from -40°C to 125°C. The SPD62R-274M extends the lower temperature limit to -55°C, providing 15°C additional cold-temperature capability while maintaining the same upper limit.