Hammond 183F20-BULK Bulk Pack 5VA 20V Center-Tapped PCB Transformer
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224-955-1644Key Features
- 5 VA rating: 20V C.T. @ 0.25A with secondaries in series, 10V @ 0.5A in parallel
- Universal dual primary: 115 VAC (parallel) or 230 VAC (series), 50/60 Hz
- Dual non-concentrically wound secondaries usable in series, parallel or separately
- Hipot 4,000 V RMS; Class F (155 °C) insulation; no electrostatic shield required
- Low profile split bobbin body, 1.63 x 1.44 x 1.38 in, 0.025 in square pins
- P.C. board mount, industry standard pin spacing, two-hole #4 screw mounting (screws not provided)
- cUL listed series; RoHS and REACH compliant
The 183F20-BULK is the bulk pack part number that the 183 Series ordering table lists alongside the 183F20. It is a 5 VA low voltage PCB mount power transformer with a dual primary for 115 V or 230 V at 50/60 Hz and dual secondaries rated 20 V C.T. at 0.25 A in series or 10 V at 0.5 A in parallel. Note that its part page lists a shipping weight of 0.4 lbs (0.18 kg), slightly above the 0.37 lb unit weight in the series table for the 5 VA size.
The low profile split bobbin and top shroud design separates primary and secondary windings; because the dual secondaries are non-concentrically wound, coupling is low and no electrostatic shield is needed. Hipot is 4,000 V RMS and the insulation system is Class F at 155 °C.
The series mounting table gives the 5 VA size as 1.63 in long, 1.44 in wide and 1.38 in high, with 0.025 in square pins, two-hole mounting for #4 screws (mounting screws not provided) and a weight of 0.37 lbs.
For 115 V operation the two primaries (pins 1-3 and 4-6) are connected in parallel; for 230 V they are connected in series. Joining secondary pin 9 to pin 10 places the windings in series, and that connection acts as the center tap.
The 183 Series is cUL listed; 183F20-BULK is RoHS and REACH compliant.
Ideal For
- Production boards needing a 20 V C.T. or 10 V AC secondary
- Equipment built for 115 VAC and 230 VAC markets
- Circuits using the two secondaries separately
Overview
| Series | 183 Series (Low Voltage PCB Mount - Universal - 2.5 VA to 56 VA) |
| Pack Type | Bulk Pack (bulk pack part number for 183F20) |
| Description | Transformer, low voltage PCB mount, 115/230V, 5VA, 20V C.T. @ 0.25A, 183 Series |
| Product Type | Transformer, low voltage PCB mount |
| Short Description | POWER PCB 5VA 115/230 |
Dimensions
| Width (W) | 1.44 in |
| Height (H) | 1.38 in |
| Length (L) | 1.63 in |
| Dimension A | 0.20 in |
| Dimension B | 0.40 in |
| Dimension C | 1.00 in |
| Dimension M | 1.06 in |
| Pin Size (Square) | 0.025 in |
Electrical
| Hipot | 4,000V RMS |
| Primary | Dual primary, 115 / 230 VAC |
| Coupling | Low primary to secondary coupling - no electrostatic shield required |
| Frequency | 50/60 Hz |
| Center Tap | Series connection (pin 9 connected to pin 10) acts as the C.T. (center tap) |
| Primary Pins | 1, 3, 4, 6 |
| Secondary Pins | 7, 9, 10, 12 |
| Power Rating (VA) | 5 |
| Secondary (RMS) Series | 20V C.T. @ 0.25A |
| Secondary Configuration | Dual winding secondaries, non-concentrically wound; can be wired in series, parallel or used separately |
| Secondary (RMS) Parallel | 10V @ 0.5A |
Identifiers
| UPC | 623980562339 |
| UNSPSC | 39121301 |
| Part Number | 183F20-BULK |
Packaging & Shipping
| Shipping Weight | 0.4 lbs (0.18 kg) |
| Unit Weight (Series Table, 5 VA) | 0.37 lbs |
Construction & Finish
| Bobbin | Low profile, split bobbin with top shroud design |
| Mounting | P.C. board mount with industry standard pin spacing |
| Mounting Holes | Two hole mounting (mounting screws not provided) |
| Mounting Screw | #4 |
| Insulation Class | Class F, 155 degrees C |
Compliance & Certifications
| RoHS Compliant | Yes |
| Series Listing | cUL |
| REACH Compliant | Yes |
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Frequently Asked Questions
What output does the 183F20-BULK provide?▾
It is rated 5 VA: 20V C.T. @ 0.25A with the secondaries connected in series, or 10V @ 0.5A with them connected in parallel. The windings can also be used separately.
Can it run on both 115 V and 230 V?▾
Yes. It has a universal dual primary for 50/60 Hz. Connect the two primary windings in parallel for 115 VAC or in series for 230 VAC.
Where is the center tap?▾
When the secondaries are connected in series by joining pin 9 to pin 10, that connection acts as the C.T. (center tap).
How big is the 183F20-BULK?▾
The series mounting table lists the 5 VA size at 1.63 in long, 1.44 in wide and 1.38 in high, with 0.025 in square pins, a #4 mounting screw and a weight of 0.37 lbs.
Are mounting screws included?▾
No. The 5 VA size uses two-hole mounting and the manufacturer states mounting screws are not provided; the specified screw is #4.
How does 183F20-BULK differ from 183F20?▾
183F20-BULK is the bulk pack part number that the 183 Series ordering table lists alongside 183F20 for the same 5 VA rating; it carries its own UPC (623980562339).
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