Hammond 1538M18 50uH 10.5A EMI/RFI Choke, Ferrite Rod Core
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Create Free Business AccountKey Features
- 50 uH +/- 10% inductance, measured at 1 kHz with 0 A DC
- 10.5 A maximum DC current rating
- 0.02 ohms maximum DC resistance
- 3.8 MHz self-resonant frequency
- High saturation flux density ferrite rod
- 1 in long leads, tinned to within 1/8 in of body
- Typical inductance change under 5% at twice rated current
- Ambient temperature range -60 C to +85 C
The 1538M18 is an EMI/RFI choke from the 1538 series, described by the manufacturer as a heavy duty RF hash choke. It is rated 50 uH +/- 10% with a maximum DC current of 10.5 A, making it a practical choice for electronics designers and OEM engineers building filtering circuits or energy storage inductors.
With 50 uH on a 0.94 in body width, the 1538M18 is a middle step for designers who need more current than the smaller 50 uH options but do not need the 15 A of the larger 1538M24.
The choke is built on a high saturation flux density ferrite rod. It has 1 in long leads, tinned to within 1/8 in of the body. The 1538 series is specified for an ambient temperature range of -60 C to +85 C.
- Inductance: 50 uH +/- 10%
- Self-resonant frequency: 3.8 MHz
- Maximum DC resistance: 0.02 ohms
- Maximum DC current: 10.5 A
- Maximum Dim. A: 1.38 in (35 mm); maximum Dim. B: 0.94 in (24 mm)
- Typical Dim. C: 0.94 in (24 mm); typical Dim. D: 0.07 in (2 mm)
Inductance for the 1538 series is measured at 1 kHz with 0 A DC current, and typical inductance change is less than 5% at twice rated current. The 1538M18 is RoHS and REACH compliant and has a shipping weight of 0.1 lbs (0.05 kg).
Ideal For
- EMI/RFI noise filtering
- RF hash suppression
- Energy storage inductor
- DC power line filtering
Overview
| Core | High saturation flux density ferrite rods |
| Series | 1538 Series |
| Description | RF Choke, heavy duty hash choke |
| Typical Use | Filtering or energy storage inductors |
| Product Type | EMI/RFI Choke (RF Choke) |
Dimensions
| Dim. A (Maximum) | 1.38 in (35 mm) |
| Dim. B (Maximum) | 0.94 in (24 mm) |
| Dim. C (Typical) | 0.94 in (24 mm) |
| Dim. D (Typical) | 0.07 in (2 mm) |
Electrical
| Inductance (L) | 50 uH +/- 10% |
| Inductance Change | Typically less than 5% at twice rated current |
| DC Current (I - DC Max) | 10.5 A |
| Inductance Test Condition | Measured at 1 kHz with 0 A DC current |
| DC Resistance (R - DC Max) | 0.02 ohms |
| Self-Resonant Frequency (SRF) | 3.8 MHz |
Identifiers
| UPC | 623980300139 |
| UNSPSC | 39121301 |
| Part Number | 1538M18 |
Packaging & Shipping
| Shipping Weight | 0.1 lbs (0.05 kg) |
Construction & Finish
| Leads | 1" long, tinned to within 1/8" of body |
Environmental & Protection
| Ambient Temperature Range | -60 C to +85 C |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
What is the inductance and current rating of the 1538M18?▾
The 1538M18 is rated 50 uH +/- 10% with a maximum DC current of 10.5 A and a maximum DC resistance of 0.02 ohms.
How is the inductance measured, and how stable is it under load?▾
Inductance for the 1538 series is measured at 1 kHz with 0 A DC current. Typical inductance change is less than 5% at twice the rated current.
What is the self-resonant frequency of the 1538M18?▾
The 1538M18 is listed at 3.8 MHz self-resonant frequency (SRF).
How big is the 1538M18?▾
The series table lists a maximum Dim. A of 1.38 in (35 mm), maximum Dim. B of 0.94 in (24 mm), typical Dim. C of 0.94 in (24 mm) and typical Dim. D of 0.07 in (2 mm). The leads are 1 in long.
Is it RoHS and REACH compliant?▾
Yes. The 1538M18 is listed as both RoHS compliant and REACH compliant.
What temperature range is the 1538 series rated for?▾
The 1538 series is specified for an ambient temperature range of -60 C to +85 C.
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