Hammond 1540M04 275uH 2A High Current Toroid Inductor
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Create Free Business AccountKey Features
- 275 uH nominal inductance, +/-15% at 0 A DC
- 2 A rated DC current with 150 uH minimum inductance at rated current
- Holds 0.8 Ls at 1.3 A DC
- 0.24 ohm maximum DC resistance
- Toroid construction for EMI/RFI filtering and switching power supply energy storage
- Minimum 0.5 in long leads for P.C. board mounting
- Operating range -20°C to 85°C; storage -20°C to 105°C
- RoHS and REACH compliant
The Hammond 1540M04 is a 275 uH high current toroid inductor from the 1540 Series, listed by the manufacturer as a heavy duty hash choke. It is aimed at power electronics engineers and OEM designers building EMI/RFI filters or energy storage inductors for switching power supplies, with a rated DC current of 2 A.
Nominal inductance is 275 uH +/-15%, measured at 0 A DC. At the rated DC current of 2 A, the 1540M04 maintains a minimum inductance of 150 uH, and it reaches 0.8 Ls (80% of nominal inductance) at 1.3 A DC. Maximum DC resistance is 0.24 ohms, which helps designers estimate copper losses at their operating current.
The part measures 0.88 in (22 mm) maximum for Dimension A and 0.44 in (11 mm) maximum for Dimension B, with a minimum Dimension C of 0.19 in (5 mm). Typical lead diameter is 0.02 in (1 mm), and shipping weight is 0.1 lbs (0.05 kg). Among the 1540 Series parts sharing the 0.88 in Dimension A body, 1540M04 offers a mid-range inductance value, with that size group spanning 10 to 450 uH.
Leads are a minimum of 0.5 in long for P.C. board mounting. The series is specified for an operating temperature range of -20°C to 85°C and a storage temperature range of -20°C to 105°C. The 1540M04 is RoHS compliant and REACH compliant.
Ideal For
- EMI/RFI filtering
- Energy storage inductors for switching power supplies
- High current DC filter chokes
- P.C. board mounted power circuits
Overview
| Series | 1540 Series |
| Description | Heavy duty hash choke |
| Product Type | High Current Toroid Inductor (RF Choke) |
Dimensions
| Dimension A (Maximum) | 0.88 in (22 mm) |
| Dimension B (Maximum) | 0.44 in (11 mm) |
| Dimension C (Minimum) | 0.19 in (5 mm) |
| Lead Diameter (Typical) | 0.02 in (1 mm) |
Electrical
| Rated DC Current | 2 A |
| DC Amps For 0.8 Ls | 1.3 A |
| Inductance Tolerance | +/- 15% |
| DC Resistance (Max) | 0.24 Ohms |
| Minimum Inductance At Rated DC | 150 uH |
| Inductance Ls (+/- 15%) @ 0 A DC | 275 uH |
Identifiers
| UPC | 623980200941 |
| UNSPSC | 39121301 |
| Part Number | 1540M04 |
Packaging & Shipping
| Shipping Weight | 0.1 lbs (0.05 kg) |
Construction & Finish
| Mounting | P.C. board |
| Core Type | Toroid |
| Lead Length | Minimum 0.5 in |
Environmental & Protection
| Storage Temperature | -20°C to 105°C |
| Operating Temperature | -20°C to 85°C |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
What is the inductance of the 1540M04?▾
Nominal inductance is 275 uH +/-15% at 0 A DC, with a minimum of 150 uH at the rated DC current of 2 A.
What is the DC resistance of the 1540M04?▾
Maximum DC resistance is 0.24 ohms.
How is the 1540M04 mounted?▾
It has minimum 0.5 in long leads for P.C. board mounting, with a typical lead diameter of 0.02 in (1 mm).
What temperature range is it rated for?▾
Operating temperature range is -20°C to 85°C and storage temperature range is -20°C to 105°C.
What are the dimensions of the 1540M04?▾
Dimension A is 0.88 in (22 mm) maximum, Dimension B is 0.44 in (11 mm) maximum and Dimension C is 0.19 in (5 mm) minimum. Shipping weight is 0.1 lbs (0.05 kg).
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