Hammond 172D 500VA Step-Down Isolation Transformer, 230 to 115VAC
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Create Free Business AccountKey Features
- 500VA isolation transformer: 230VAC 50/60 Hz primary, 115VAC secondary
- Provides circuit isolation and steps down primary voltage
- Electrostatic shield; -37.69 dB surge/noise suppression
- 3 A circuit breaker in primary; hi-pot tested to 2 KV RMS
- 5 ft input cord with NEMA 6-15P 250V plug; 1 ft output cord with NEMA 5-15R
- 96% full-load efficiency, 0.23% full-load THD, 68.22 µA leakage
- C UL and UL listed (File #E211544); indoor use only
The 172D is a 500VA plug-in step-down isolation transformer that converts a 230VAC, 50/60 Hz supply to 115VAC while providing circuit isolation. It suits integrators, lab users and equipment builders who need to run 115VAC North American equipment from a 230VAC source.
An electrostatic shield sits between primary and secondary, the unit is hi-pot tested to 2 KV RMS, and it has a 3 amp circuit breaker in the primary. Measured performance: leakage current 68.22 µA, full-load efficiency 96%, full-load total harmonic distortion 0.23%, surge/noise suppression -37.69 dB and capacitance between windings of 28 pF at 1 kHz.
The input (primary) is a 5 foot cord with a North American 3-wire, 250V NEMA 6-15P plug. The output (secondary) is a 1 foot cord ending in a standard North American 3-wire grounded NEMA 5-15R receptacle with North American pins; the 298G adaptor series offers international pinout adaptor plugs. The unit is for indoor use only and does not convert line frequency.
Overall dimensions are A 3.80 in (97 mm), B 7.06 in (179 mm), C 4.68 in (119 mm), D 3.00 in (76 mm) and E 5.38 in (137 mm), with a shipping weight of 18.5 lbs (8.39 kg). The 500VA 172D has a 3 amp primary breaker and 96% full-load efficiency, with 28 pF capacitance between windings. The 172D carries the North American Mark of Safety, C UL and UL listed (File #E211544), and is RoHS and REACH compliant.
Ideal For
- Running 115VAC equipment from a 230VAC supply
- Circuit isolation with voltage step-down
- Plug-in step-down for NEMA 6-15 outlets
- Laboratory test benches where line voltage is used
Overview
| Series | 172 Series, Isolation - Step Down (230VAC to 115VAC) |
| Description | Isolation transformer, plug-in, 230VAC, 50/60 Hz to 115VAC, 500VA, 172 Series |
| Product Type | Isolation transformer, plug-in, step down |
| Short Description | PLUG IN STEP DOWN ISOLATION |
Dimensions
| Overall Dimension A | 3.80 in (97 mm) |
| Overall Dimension B | 7.06 in (179 mm) |
| Overall Dimension C | 4.68 in (119 mm) |
| Overall Dimension D | 3.00 in (76 mm) |
| Overall Dimension E | 5.38 in (137 mm) |
Electrical
| Capacity | 500 VA |
| Function | Circuit isolation & step down of primary voltage |
| Frequency | 50 / 60 Hz (does not convert line frequency) |
| Shielding | Electrostatic shield between primary & secondary |
| Hi-Pot Test | 2 KV RMS |
| Circuit Breaker | 3 A, on primary |
| Leakage Current | 68.22 µA |
| Primary Voltage | 230VAC |
| Receptacle Pins | North American |
| Input Connection | 5 ft (1.52 m) cord with NEMA 6-15P plug |
| Output Connection | 1 ft (0.30 m) cord with NEMA 5-15R receptacle |
| Secondary Voltage | 115VAC |
| Full Load Efficiency | 96% (0.96) |
| International Adaptors | 298G adaptor series (international pinout adaptor plugs) |
| Surge/Noise Suppression | -37.69 dB |
| Rated Current (Per Drawing) | 4.35A |
| Leakage Current (Drawing, Typical) | < 100 µA |
| Full Load Total Harmonic Distortion | 0.23% (0.0023) |
| Capacitance Between Windings @ 1 KHz | 28 pF |
| Surge/Noise Suppression (Drawing, Typical) | -37 dB |
Identifiers
| UPC | 623980251400 |
| UNSPSC | 39121301 |
| Part Number | 172D |
Packaging & Shipping
| Shipping Weight | 18.5 lbs (8.39 kg) |
| Weight (Drawing) | 18.5 lbs / 8.39 kg |
| Weight (Ordering Table) | 18.5 lbs |
Environmental & Protection
| Environment | Indoor use only |
Compliance & Certifications
| UL File # | E211544 |
| RoHS Compliant | Yes |
| Safety Listing | C UL & UL listed (North American Mark of Safety) |
| REACH Compliant | Yes |
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Frequently Asked Questions
What voltages does the 172D handle?▾
The primary is 230VAC at 50/60 Hz and the secondary is 115VAC. It provides circuit isolation and steps the primary voltage down.
What plug is on the 172D input?▾
The 5 foot input cord uses a North American 3-wire, 250V NEMA 6-15P plug. Per the series notes, European (Schuko) plugs appear on old inventory only, following U.L. changes in 2007.
What outlet does the 172D provide?▾
A 1 foot output cord ends in a standard North American 3-wire grounded NEMA 5-15R receptacle. For international pinouts, the 298G adaptor series offers adaptor plugs.
Is the 172D protected against overcurrent?▾
Yes. It has a 3 amp circuit breaker in the primary, and it is hi-pot tested to 2 KV RMS.
Does the 172D convert 50 Hz to 60 Hz?▾
No. These units do not convert line frequency; they operate on 50/60 Hz and change voltage only.
Is the 172D UL listed?▾
Yes. It carries the North American Mark of Safety, C UL and UL listed under File #E211544. It is for indoor use only.
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