Hammond 157D 1mH 10A DC Reactor, 400V Open Channel Mount
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Create Free Business AccountKey Features
- 1mH inductance (+/- 15%) at 10A rated D.C. current
- 0.038 ohm D.C. resistance (+/- 15%)
- 400 V DC maximum operating voltage
- Economical open bracket channel mount, C9H mounting style
- Every unit Hipot tested (100%) at 1,500 VAC
- Vacuum impregnated with polyurethane varnish for quiet operation and long life
- Minimum 5" long leads
- RoHS and REACH compliant
Part 157D is a channel-mounted D.C. reactor with 1mH of inductance and a 10A D.C. current rating. It belongs to the 153-159 Series of low to medium current filter chokes, which the manufacturer positions for high voltage power supply filtering. The 157D is a 10 A DC reactor with 1mH of inductance and 0.038 ohms of resistance, the lowest inductance and lowest resistance listed in the 153-159 series table, rated to 400 V DC.
Winding resistance is 0.038 ohms (+/- 15%) and the maximum operating voltage is 400 V DC. Inductance is measured at the rated D.C. current; expect less inductance at slightly higher currents and more at lower currents, so size the choke to your actual load current.
The choke is built on an open bracket channel frame and vacuum impregnated with polyurethane varnish for quiet, long-life operation. Each unit is 100% Hipot tested at 1,500 VAC and supplied with leads at least 5" long.
The series table lists the C9H mounting style at A 3.25", B 1.75", C 2.00" and D 2.81" with a 0.19" mounting hole, and a unit weight of 1 lbs. The part page lists a shipping weight of 1 lbs (0.45 kg), and the 157D is RoHS and REACH compliant (UNSPSC 39121301, UPC 623980203102).
Ideal For
- 10 A DC filtering
- Low-resistance DC reactor for 400 V circuits
- High-current chassis-mounted chokes
- Power supply repair and replacement
Mounting
| Mounting Style | Open bracket channel mount |
| Mounting Hole (Series Table) | 0.19" |
| Dimension Reference (Mtg. Style) | C9H |
Overview
| Series | 153-159 Series D.C. Reactors or filter chokes |
| Product Type | D.C. reactor / filter choke |
| Current Class | Low to medium current |
| Long Description | DC reactor, filter choke, open channel mount, inductance 1mH, DC current 10A |
| Short Description | CHOKE |
| Enclosed-Type Alternative | 193 Series (more sizes and voltages in enclosed-type design) |
Dimensions
| Dimension A (Series Table, C9H) | 3.25" |
| Dimension B (Series Table, C9H) | 1.75" |
| Dimension C (Series Table, C9H) | 2.00" |
| Dimension D (Series Table, C9H) | 2.81" |
Electrical
| Hipot Test | Every unit Hipot tested (100%) at 1,500 VAC |
| DC Current | 10A (series table: 10 A) |
| Current Dependence | Less inductance at slightly higher currents, more inductance at lower currents |
| Inductance (+/- 15%) | 1mH |
| Inductance Tolerance | 15% |
| Resistance (+/- 15%) | 0.038 ohms |
| Resistance Tolerance | 15% |
| Inductance Measurement | Measured at rated D.C. current |
| Maximum Operating Volts DC | 400 V |
Identifiers
| UPC | 623980203102 |
| UNSPSC | 39121301 |
| Part Number | 157D |
Packaging & Shipping
| Shipping Weight | 1 lbs (0.45 kg) |
| Unit Weight (Series Table) | 1 lbs |
Construction & Finish
| Leads | Minimum 5" long leads |
| Impregnation | Vacuum impregnated with polyurethane varnish |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
What are the inductance and current ratings of the 157D?▾
The 157D is rated 1mH (+/- 15%) at 10A D.C. current, with 0.038 ohms (+/- 15%) of resistance.
What is the maximum operating voltage of the 157D?▾
The 157D is rated for 400 V DC maximum operating voltage.
Will the 157D hold its inductance at a different current?▾
Inductance is measured at the rated 10A. The series data notes units exhibit less inductance at slightly higher currents and more inductance at lower currents.
How does the 157D mount and how big is it?▾
It uses an economical open bracket channel mount (mounting style C9H). The series table lists the C9H mounting style at A 3.25", B 1.75", C 2.00" and D 2.81" with a 0.19" mounting hole, and a unit weight of 1 lbs.
Is the 157D RoHS and REACH compliant?▾
Yes. The part page lists the 157D as both RoHS compliant and REACH compliant.
Is every 157D tested?▾
Yes. Every unit in the series is Hipot tested (100%) at 1,500 VAC, and units are vacuum impregnated with polyurethane varnish.
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