Magnetic inductor ERUC23

SMDfor switching power suppliesfor automotive applications

Product overview
TDK Corporation has expanded its family of flat wire inductors with the EPCOS ERUC23 coupled inductor series (ordering code family B82559S*). These SMD coupled inductors incorporate two windings sharing a single magnetic core and are available in six types. The series is AEC‑Q200-qualified and RoHS-compliant and designed for automatic pick-and-place surface mounting. Footprint: 26.8 x 13.8 mm; heights vary between 13.7 mm and 14.0 mm depending on type. Specified operating temperature range: -40 °C to +150 °C. DC resistance of a single winding ranges from 0.82 mΩ to 1.85 mΩ depending on the type.

Applications

• Dual‑phase buck and boost converters and buck/boost converters
• Hybrid converters for 48 V to 12 V (flying capacitor converters)

Main features and benefits

• High saturation currents per type
• Low DC resistance per winding
• Compatible with automatic pick-and-place (surface mount)
• Reduced ripple and improved efficiency in a compact package
• Space saving compared with two separate chokes

Key Data (table)
Type | Coupled Inductance (nom.) [μH] | DC resistance of one winding [mΩ] | Saturation current (typ., 25 °C) [A] | Saturation current (typ., 100 °C) [A]
ERUC23-4R1K | 4.1 | 1.85 | 50 | 39.5
ERUC23-3R2K | 3.2 | 1.85 | 63.5 | 49
ERUC23-2R8K | 2.8 | 1.25 | 61 | 47
ERUC23-2R2K | 2.2 | 1.25 | 77 | 58
ERUC23-1R8K | 1.8 | 0.82 | 81 | 62
ERUC23-1R4K | 1.4 | 0.82 | 97 | 73

Technical specifications

• Series / model: ERUC23 (EPCOS, ordering code family B82559S*)
• Number of types: 6
• Coupled inductance range: 1.4 μH to 4.1 μH
• Saturation current (typ., 25 °C): 50 A to 97 A (varies by type)
• Saturation current (typ., 100 °C): 39.5 A to 73 A (varies by type)
• DC resistance (single winding): 0.82 mΩ to 1.85 mΩ (varies by type)
• Footprint: 26.8 x 13.8 mm
• Height: 13.7 mm to 14.0 mm (depending on type)
• Qualification / compliance: AEC‑Q200-qualified, RoHS-compliant
• Mounting: Surface-mount, automatic pick-and-place compatible
• Operating temperature range: -40 °C to +150 °C