Hammond 1539M12 25uH 14A EMI/RFI Choke, Ferrite Bobbin Core
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Create Free Business AccountKey Features
- 25 uH +/- 10% inductance, measured at 1 kHz with 0 A DC
- 14 A maximum DC current rating
- 0.009 ohms maximum DC resistance
- 5.2 MHz minimum Fo
- High saturation flux density ferrite bobbin core
- 1 in long leads, tinned to within 1/8 in of body
- Typical inductance change under 5% at twice rated current
- RoHS and REACH compliant
The 1539M12 is an EMI/RFI choke from the 1539 series, described by the manufacturer as a heavy duty RF hash choke. It is rated 25 uH +/- 10% with a maximum DC current of 14 A, making it a practical choice for electronics designers and OEM engineers building filtering circuits or energy storage inductors.
The 1539M12 is the higher-current 25 uH option in the 1539 series at 14 A, compared with 8 A for the smaller 1539M03.
The choke is built on a high saturation flux density ferrite bobbin core. It has 1 in long leads, tinned to within 1/8 in of the body. Maximum DC resistance is 0.009 ohms and the minimum Fo is 5.2 MHz.
- Inductance: 25 uH +/- 10%
- Fo minimum: 5.2 MHz
- Maximum DC resistance: 0.009 ohms
- Maximum DC current: 14 A
- Maximum Dim. A: 1.22 in (31 mm); maximum Dim. B: 1.11 in (28 mm)
- Typical Dim. C: 0.93 in (24 mm); typical Dim. D: 0.08 in (2 mm)
Inductance for the 1539 series is measured at 1 kHz with 0 A DC current, and typical inductance change is less than 5% at twice rated current. The 1539M12 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
- High-current DC filtering
Overview
| Core | High saturation flux density ferrite bobbins |
| Series | 1539 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) | 1.22 in (31 mm) |
| Dim. B (Maximum) | 1.11 in (28 mm) |
| Dim. C (Typical) | 0.93 in (24 mm) |
| Dim. D (Typical) | 0.08 in (2 mm) |
Electrical
| Fo Min. | 5.2 MHz |
| Inductance (L) | 25 uH +/- 10% |
| Inductance Change | Typically less than 5% at twice rated current |
| DC Current (I - DC Max) | 14 A |
| Inductance Test Condition | Measured at 1 kHz with 0 A DC current |
| DC Resistance (R - DC Max) | 0.009 ohms |
Identifiers
| UPC | 623980300337 |
| UNSPSC | 39121301 |
| Part Number | 1539M12 |
Packaging & Shipping
| Shipping Weight | 0.1 lbs (0.05 kg) |
Construction & Finish
| Leads | 1" long, tinned to within 1/8" of body |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
What is the inductance and current rating of the 1539M12?▾
The 1539M12 is rated 25 uH +/- 10% with a maximum DC current of 14 A and a maximum DC resistance of 0.009 ohms.
How is the inductance measured, and how stable is it under load?▾
Inductance for the 1539 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 minimum Fo of the 1539M12?▾
The 1539M12 is listed at 5.2 MHz Fo minimum.
How big is the 1539M12?▾
The series table lists a maximum Dim. A of 1.22 in (31 mm), maximum Dim. B of 1.11 in (28 mm), typical Dim. C of 0.93 in (24 mm) and typical Dim. D of 0.08 in (2 mm). The leads are 1 in long.
Is it RoHS and REACH compliant?▾
Yes. The 1539M12 is listed as both RoHS compliant and REACH compliant.
Are there other 25 uH chokes in the 1539 series?▾
Yes. 1539M03 is rated 8 A, compared with 14 A for the 1539M12.
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