Hammond 158T 1H 300mA Filter Choke, 400VDC C10H Frame
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Create Free Business AccountKey Features
- 1.0H ±15% inductance at rated 300 mA DC current
- 40 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 105°C
- Every unit Hipot tested (100%) at 1,500 VAC; leads minimum 5 in long
- RoHS and REACH compliant
The 158T is a 1.0 henry filter choke rated for 300 mA DC, used by power supply designers who need a low-resistance choke for heavier high voltage loads.
The drawing (Rev. 0, 11/06/24) confirms 1H at 300 mA DC under a 30 V, 60 Hz test, with a measured DCR of 39.97 ohms against the 40 ohm catalogue value.
Electrically, the 158T is specified at 1.0H ±15% with its inductance measured at the rated 300 mA DC. DC resistance is 40 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 105°C and storage from -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 1.5 lb in the series table and 1.5 lbs (0.68 kg) shipping weight. The part is RoHS and REACH compliant (UNSPSC 39121301, UPC 623980204505).
Ideal For
- High voltage power supply filtering
- DC reactor for supply rails up to 400 VDC at 300 mA
- Open-bracket channel mounting in equipment chassis
- Replacement filter choke for existing 158T 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 1.0H, DC current 300 ma. |
| Part Number | 158T |
| 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) | 39.97 Ω ±15% @ 20°C, BLK - BLK |
| Hipot (Drawing) | 1500V, 60Hz, 1 sec (primary - secondary) |
| Inductance (±15%) | 1.0H |
| Resistance (±15%) | 40 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) | 1H ±15%, 300mA DC, 400VDC MAX. Op. |
| Inductance Test (Drawing) | @ 30V, 60Hz, 300mA DC, BLK - BLK: 1H ±15% |
| Maximum Operating Voltage DC | 400 VDC |
| Inductance & Resistance Tolerance | 15% |
Identifiers
| UPC | 623980204505 |
| UNSPSC | 39121301 |
| Drawing Revision | Rev. 0, released 11/06/24 |
Packaging & Shipping
| Shipping Weight | 1.5 lbs (0.68 kg) |
| Weight (Series Table) | 1.5 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
| 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 158T?▾
The 158T is rated 1.0H ±15% at 300 mA DC, and its inductance is measured at that rated DC current.
What voltage can the 158T be used at?▾
The listed maximum operating voltage is 400 VDC.
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 300 mA?▾
Per the manufacturer, units exhibit less inductance at slightly higher currents and more inductance at lower currents.
Is the 158T RoHS compliant?▾
Yes. It is listed as both RoHS and REACH compliant.
What temperatures is the 158T 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 manufactured using Class B (130°C) materials.
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