Hammond 183E28-BULK 2.5VA 28V CT Pcb Transformer, Bulk Pack
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224-955-1644Key Features
- 2.5 VA PCB-mount transformer: 28V C.T. @ 0.09A series or 14V @ 0.18A parallel
- Dual 115/230 VAC primary, 50/60 Hz, for universal operation
- Dual non-concentric secondaries: wire in series, parallel or use separately
- Low profile split bobbin with top shroud; 1.63 x 1.44 x 1.13 in body
- Hipot 4,000V RMS; Class F insulation rated 155 degrees C
- Low primary-to-secondary coupling, no electrostatic shield required
- Two-hole mounting, #4 screws (not provided); 0.025 in square pins
- cUL listed series; RoHS and REACH compliant
The 183E28-BULK is the bulk-pack part number for the 183E28, a 2.5 VA low-voltage power transformer for printed circuit board mounting from the 183 Series. It carries the same electrical rating as the 183E28: 28V C.T. @ 0.09A with the two secondaries in series, or 14V @ 0.18A with them in parallel. It suits OEM engineers and electronics builders ordering the part for production PCB assemblies.
Universal operation comes from a dual primary rated 115 or 230 VAC at 50/60 Hz, so one board design can serve either line voltage. The dual winding secondaries are non-concentrically wound and can be wired in series, in parallel or used separately; when connected in series (pin 9 to pin 10) that connection acts as the center tap. Low primary-to-secondary coupling means no electrostatic shield is required.
Construction is a low profile split bobbin with a top shroud, with high insulation (Hipot of 4,000V RMS) and Class F insulation rated 155 degrees C. The body measures 1.63 in long, 1.44 in wide and 1.13 in high, with 0.025 in square pins at industry standard spacing. At 2.5 VA it uses two-hole mounting with #4 screws, which are not provided.
The series is listed as cUL, and the 183E28-BULK is RoHS and REACH compliant. The series table gives a weight of 0.17 lbs for the 2.5 VA size, and the listed shipping weight of this part number is 0.24 lbs (0.11 kg).
Ideal For
- 28V center-tapped or 14V low-voltage board supplies
- PCB-mounted power for equipment used on 115 or 230 VAC lines
- Low-voltage power for compact electronics assemblies
- Production PCB assembly runs
Mounting
| Mounting Type | P.C. board mount with industry standard pin spacing |
| Mounting Holes | Two hole mounting |
| Mounting Screw | #4 (mounting screws not provided) |
| Pin Size (Square) | 0.025 in |
Overview
| Series | 183 Series |
| Pack Type | Bulk pack |
| Product Type | Low voltage P.C. board mounted power transformer |
| Long Description | Transformer, low voltage PCB mount, 115/230V, 2.5VA, 28V C.T. @ 0.09A, 183 Series |
| Short Description | POWER PCB 2.5VA 115/230 |
| Standard Pack Part Number | 183E28 |
Dimensions
| Weight | 0.17 lbs |
| Width (W) | 1.44 in |
| Height (H) | 1.13 in |
| Length (L) | 1.63 in |
| Dimension A | 0.20 in |
| Dimension B | 0.25 in |
| Dimension C | 1.00 in |
| Dimension M | 1.06 in |
Electrical
| Hipot | 4,000V RMS |
| 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. |
| Power Rating | 2.5 VA |
| Primary Voltage | 115 / 230 VAC (dual primary) |
| Insulation Class | Class F - 155 degrees C |
| Secondary (RMS), Series | 28V C.T. @ 0.09A |
| Secondary Configuration | Dual winding, non-concentrically wound; series, parallel or separate use |
| Secondary (RMS), Parallel | 14V @ 0.18A |
Identifiers
| UPC | 623980562308 |
| UNSPSC | 39121301 |
| Part Number | 183E28-BULK |
Packaging & Shipping
| Shipping Weight | 0.24 lbs (0.11 kg) |
Construction & Finish
| Construction | Low profile, split bobbin with top shroud design |
Compliance & Certifications
| Listings | cUL |
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
What outputs does the 183E28-BULK deliver?▾
28V C.T. @ 0.09A with the secondaries wired in series, or 14V @ 0.18A with them wired in parallel. The windings can also be used separately.
Can the 183E28-BULK be used on 115V and 230V lines?▾
Yes. It has a dual primary for 115 or 230 VAC at 50/60 Hz: wire the primaries in parallel for 115V or in series for 230V.
How is the 183E28-BULK mounted?▾
It is a P.C. board mount transformer with industry standard pin spacing and 0.025 in square pins. The 2.5 VA size uses two-hole mounting with #4 screws, which are not provided.
What are the dimensions of the 183E28-BULK?▾
L 1.63 in, W 1.44 in, H 1.13 in. Weight is listed as 0.17 lbs; shipping weight is 0.24 lbs (0.11 kg).
Does it need an electrostatic shield?▾
No. The split bobbin design has low primary to secondary coupling, so no electrostatic shield is required.
How does the 183E28-BULK differ from the 183E28?▾
The 183E28-BULK is the bulk pack part number listed for the 183E28; both carry the same 2.5 VA rating and 28V C.T. @ 0.09A / 14V @ 0.18A secondary.
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