Hammond 158M 10H 100mA Filter Choke, Class B Open Frame
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Create Free Business AccountKey Features
- 10H ±15% inductance at rated 100 mA DC current
- 195 ohm ±15% DC resistance; 400 VDC maximum operating voltage
- Open-bracket channel mount, mounting style C10H (A 3.25 in x C 2.00 in)
- Vacuum impregnated with polyurethane varnish for quiet operation and long life
- Manufactured using Class B (130°C) materials; operating temperature -40°C to +85°C
- Every unit Hipot tested (100%) at 1,500 VAC; leads minimum 5 in long
- RoHS and REACH compliant
The 158M is a 10 henry DC reactor rated for 100 mA DC, used to filter ripple from high voltage DC power supplies in equipment builds and repairs.
Its drawing (Rev. 1, 03/21/25, corrected DCR) records an inductance test at 30 V, 60 Hz with 100 mA DC bias and a measured DCR of 188.9 ohms, against 195 ohms in the catalogue table.
Electrically, the 158M is specified at 10H ±15% with its inductance measured at the rated 100 mA DC. DC resistance is 195 ohms ±15% and the maximum operating voltage is 400 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 manufactured using Class B (130°C) materials, black leads, an operating temperature of -40°C to +85°C.
Mechanically it uses mounting style C10H: the series table lists A 3.25 in, B 1.88 in, C 2.00 in and D 2.81 in with a 0.19 in mounting hole. Weight is 1.25 lb in the series table and 1.25 lbs (0.57 kg) shipping weight. The part is RoHS and REACH compliant (UNSPSC 39121301, UPC 623980204109).
Ideal For
- High voltage power supply filtering
- DC reactor for supply rails up to 400 VDC at 100 mA
- Open-bracket channel mounting in equipment chassis
- Replacement filter choke for existing 158M 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 10H, DC current 100 ma. |
| Part Number | 158M |
| Short Description | CHOKE |
Dimensions
| Dimension A (Part Drawing) | 3.250" ±0.063 |
| Dimension B (Part Drawing) | 1.885" ±0.125 |
| Dimension C (Part Drawing) | 1.995" ±0.063 |
| Dimension D (Part Drawing) | 2.813" ±0.063 |
| Mounting Style (Dim. Ref.) | C10H |
| Mounting Hole (Series Table) | 0.19 in |
| Mounting Hole G (Part Drawing) | 0.187" ±0.015 |
| Dimension A (C10H Series Table) | 3.25 in |
| Dimension B (C10H Series Table) | 1.88 in |
| Dimension C (C10H Series Table) | 2.00 in |
| Dimension D (C10H Series Table) | 2.81 in |
Electrical
| DCR (Drawing) | 188.9 Ω ±15% @ 20°C, BLK - BLK |
| Inductance (±15%) | 10H |
| Resistance (±15%) | 195 ohms |
| Hipot Test (Series) | Every unit Hipot tested (100%) at 1,500 VAC |
| DC Current (Rated) | 100 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) | 10H ±15%, 100mA DC, 500VDC MAX. Op. |
| Inductance Test (Drawing) | @ 30V, 60Hz, 100mA DC, BLK - BLK: 10H ±15% |
| Maximum Operating Voltage DC | 400 VDC |
| Inductance & Resistance Tolerance | 15% |
Identifiers
| UPC | 623980204109 |
| UNSPSC | 39121301 |
| Drawing Revision | Rev. 1, 03/21/25 (corrected DCR); originally released 10/01/12 |
Packaging & Shipping
| Shipping Weight | 1.25 lbs (0.57 kg) |
| Weight (Series Table) | 1.25 lbs |
Construction & Finish
| Leads | Minimum 5" long |
| Mounting | Economical "open bracket" channel mount |
| Insulation | Manufactured using Class B (130°C) materials |
| Impregnation | Vacuum impregnated with polyurethane varnish for quiet operation and long life |
Environmental & Protection
| Operating Temperature | -40°C to +85°C |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
| Drawing Compliance Note | RoHS Compliant |
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Frequently Asked Questions
What are the inductance and current ratings of the 158M?▾
The 158M is rated 10H ±15% at 100 mA DC, and its inductance is measured at that rated DC current.
What voltage can the 158M be used at?▾
The listed maximum operating voltage is 400 VDC. Its part drawing label reads 500VDC MAX. Op..
How is the choke mounted?▾
It uses an economical open-bracket channel mount in mounting style C10H, with a 0.19 in mounting hole per the series mechanical table.
What happens if my circuit draws more or less than 100 mA?▾
Per the manufacturer, units exhibit less inductance at slightly higher currents and more inductance at lower currents.
Is the 158M RoHS compliant?▾
Yes. It is listed as both RoHS and REACH compliant.
What temperatures is the 158M rated for?▾
The part drawing gives an operating temperature of -40°C to +85°C, with manufactured using Class B (130°C) materials.
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