Hammond 159T 2.5H 300mA DC Filter Choke, 500VDC Rating
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Create Free Business AccountKey Features
- 2.5H ±15% inductance at rated 300 mA DC current
- 43 ohm ±15% DC resistance; 500 VDC maximum operating voltage
- Open-bracket channel mount, mounting style C14H (A 4.03 in x C 2.63 in)
- Vacuum impregnated with polyurethane varnish for quiet operation and long life
- Class B (130°C) insulation; operating temperature -40°C to 105°C
- Every unit Hipot tested (100%) at 1,500 VAC; leads minimum 5 in long
- RoHS and REACH compliant
The 159T is a 2.5 henry DC filter choke rated for 300 mA DC and 500 VDC maximum operating voltage, for high voltage supplies carrying heavier loads.
Its drawing (Rev. 0, 03/10/25) records an inductance test at 100 V, 60 Hz with 300 mA DC bias and a measured DCR of 40.17 ohms against the 43 ohm catalogue value.
Electrically, the 159T is specified at 2.5H ±15% with its inductance measured at the rated 300 mA DC. DC resistance is 43 ohms ±15% and the maximum operating voltage is 500 VDC. As with every choke in the 153-159 Series, it will show less inductance at slightly higher currents and more inductance at lower currents, so size it to the actual load current.
Construction follows the series' economical open-bracket channel mount, with leads at least 5 in long. Units are vacuum impregnated with polyurethane varnish for quiet operation and long life, and every unit is Hipot tested (100%) at 1,500 VAC. The part drawing adds class B (130°C) insulation, black leads, an operating temperature of -40°C to 105°C and storage from -40°C to 85°C.
Mechanically it uses mounting style C14H: the series table lists A 4.03 in, B 2.25 in, C 2.63 in and D 3.56 in with a 0.19 in mounting hole. Weight is 2.25 lb in the series table and 2.3 lbs (1.04 kg) shipping weight. The part is RoHS and REACH compliant (UNSPSC 39121301, UPC 623980205007).
Ideal For
- High voltage power supply filtering
- DC reactor for supply rails up to 500 VDC at 300 mA
- Open-bracket channel mounting in equipment chassis
- Replacement filter choke for existing 159T designs
Overview
| Series | 153-159 Series D.C. Reactors or Filter Chokes (low to medium current) |
| Description | DC reactor, filter choke, open channel mount, inductance 2.5H, DC current 300 ma. |
| Part Number | 159T |
| Short Description | CHOKE |
Dimensions
| Dimension A (Part Drawing) | 4.000" ±0.063 |
| Dimension B (Part Drawing) | 2.085" ±0.125 |
| Dimension C (Part Drawing) | 2.625" ±0.063 |
| Dimension D (Part Drawing) | 3.563" ±0.063 |
| Mounting Style (Dim. Ref.) | C14H |
| Mounting Hole (Series Table) | 0.19 in |
| Mounting Hole G (Part Drawing) | 0.187" ±0.015 |
| Dimension A (C14H Series Table) | 4.03 in |
| Dimension B (C14H Series Table) | 2.25 in |
| Dimension C (C14H Series Table) | 2.63 in |
| Dimension D (C14H Series Table) | 3.56 in |
Electrical
| DCR (Drawing) | 40.17 Ω ±15% @ 20°C, BLK - BLK |
| Hipot (Drawing) | 2500V, 60Hz, 1 sec (primary - secondary) |
| Inductance (±15%) | 2.5H |
| Resistance (±15%) | 43 ohms |
| Hipot Test (Series) | Every unit Hipot tested (100%) at 1,500 VAC |
| DC Current (Rated) | 300 ma. |
| Inductance Measurement | Measured at rated D.C. current |
| Inductance Vs. Current | Less inductance at slightly higher currents, more inductance at lower currents |
| Label Marking (Drawing) | 2.5H ±15%, 300mA DC, 500VDC MAX. Op. |
| Inductance Test (Drawing) | @ 100V, 60Hz, 300mA DC, BLK - BLK: 2.5H ±15% |
| Maximum Operating Voltage DC | 500 VDC |
| Inductance & Resistance Tolerance | 15% |
Identifiers
| UPC | 623980205007 |
| UNSPSC | 39121301 |
| Drawing Revision | Rev. 0, released 03/10/25 |
Packaging & Shipping
| Shipping Weight | 2.3 lbs (1.04 kg) |
| Weight (Part Drawing) | 2.25 lbs |
| Weight (Series Table) | 2.25 lbs |
Construction & Finish
| Leads | Minimum 5" long |
| Mounting | Economical "open bracket" channel mount |
| Insulation | Class B (130°C) insulation |
| Impregnation | Vacuum impregnated with polyurethane varnish for quiet operation and long life |
| Channel Frame Thickness | 0.030" |
Environmental & Protection
| Storage Temperature | -40°C to 85°C |
| Operating Temperature | -40°C to 105°C |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
| Drawing Compliance Note | RoHS & REACH Compliant |
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Frequently Asked Questions
What are the inductance and current ratings of the 159T?▾
The 159T is rated 2.5H ±15% at 300 mA DC, and its inductance is measured at that rated DC current.
What voltage can the 159T be used at?▾
The listed maximum operating voltage is 500 VDC.
How is the choke mounted?▾
It uses an economical open-bracket channel mount in mounting style C14H, with a 0.19 in mounting hole per the series mechanical table.
What happens if my circuit draws more or less than 300 mA?▾
Per the manufacturer, units exhibit less inductance at slightly higher currents and more inductance at lower currents.
Is the 159T RoHS compliant?▾
Yes. It is listed as both RoHS and REACH compliant.
What temperatures is the 159T rated for?▾
The part drawing gives an operating temperature of -40°C to 105°C and a storage temperature of -40°C to 85°C, with class B (130°C) insulation.
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