Hammond 164J28 36VA 28V C.T. Low Profile PCB Power Transformer
Ships from and sold by A5 IT
Exclusive pricing and Net-30 terms. Sign in or create a free account.
Create Free Business AccountKey Features
- 36VA power rating with 115V single primary, 50/60 Hz
- Secondary 28V C.T. @ 1.3A in series or 14V @ 2.6A in parallel
- Low profile, split bobbin design for PCB mounting with industry standard pin spacing
- Four-hole mounting for #6 screws (mounting screws not provided)
- Non-concentric dual secondaries: low coupling, no electrostatic shield required
- Class B insulation (130 degrees C), hipot 2,500V RMS
- c UL us recognized; RoHS and REACH compliant
The 164J28 is a 36VA low voltage power transformer for printed circuit board mounting, built in a low profile, split bobbin format. It has an economical single 115V primary for 50/60 Hz operation and a dual-winding secondary that delivers 28V C.T. @ 1.3A when the windings are connected in series, or 14V @ 2.6A when they are connected in parallel. It suits OEM engineers and electronics designers who need a compact board-level AC source at 28V centre-tapped or 14V.
The two secondary windings are non-concentrically wound, which keeps primary-to-secondary coupling low so no electrostatic shield is required. The unit is designed so that all windings must be used. Insulation is Class B (130 degrees C) and the transformer is hipot tested at 2,500V RMS. It is c UL us recognized and listed as RoHS and REACH compliant.
As a 36VA (J-size) model in the 162-164 series, the 164J28 measures 2.63 in long, 2.19 in wide and 1.56 in high on the series mechanical table, with a listed weight of 1.1 lbs and a shipping weight of 1.09 lbs (0.49 kg). It uses industry standard PCB pin spacing and four-hole mounting (mounting screws not provided), sized for #6 screws.
The part drawing shows the 115V primary on pins 1 and 4, with the two secondary windings on pins 5-6 and 7-8, each marked 14V at 1.3A. Need universal 115/230V input instead? The equivalent dual-primary part in the same series is 162J28.
Ideal For
- Board-level low voltage AC supply from a 115V line
- 28V centre-tapped secondary (series connection)
- 14V higher-current output (parallel connection)
- OEM electronics requiring a low profile PCB mount transformer
Mounting
| Mounting Type | P.C. board mount, industry standard pin spacing |
| Mounting Holes | Four-hole mounting (mounting screws not provided) |
| Mounting Screw | #6 |
Overview
| Series | 162-164 Series (Low Voltage PCB Mount - Low Profile - 1.1 VA to 36 VA) |
| Description | Transformer, low voltage PCB mount, low profile, 115V, 36VA, 28V C.T. @ 1.3A |
| Part Number | 164J28 |
| VA Size Letter | J |
| Short Description | POWER TX 36VA 115V 50/60HZ |
| Equivalent Dual Primary (115/230V) Part | 162J28 |
Dimensions
| Width (W) | 2.188" ±0.030 |
| Height (H) | 1.563" ±0.030 |
| Length (L) | 2.625" ±0.030 |
| Dimension A | 0.400" ±0.030 |
| Dimension B | 0.400" ±0.030 |
| Dimension C | 1.850" ±0.030 |
| Dimension N | 1.750" ±0.030 |
| Dimension P | 2.188" ±0.030 |
| Pin Size (D) | 0.041" x 0.018" ±0.005 |
Electrical
| Hipot | 2,500V RMS |
| Primary | Single primary, 115V |
| Frequency | 50/60 Hz |
| Power Rating | 36 VA |
| Primary Pins | Pin 1 - Pin 4: 115V |
| Secondary Pins | Pin 5 - Pin 6: 14V 1.3A; Pin 7 - Pin 8: 14V 1.3A |
| Electrostatic Shield | Not required (low primary to secondary coupling) |
| Hipot Test (Drawing) | Primary - Secondary: 2500V, 60Hz, 1 sec |
| DC Resistance, Primary | @ 20°C, Pin 1 - Pin 4 = 20.63 ±20% |
| Secondary (RMS) Series | 28V C.T. @ 1.3A |
| Secondary Construction | Dual winding secondaries, non-concentrically wound; all windings must be used |
| DC Resistance, Secondary | @ 20°C, Pin 5 - Pin 6 = 0.792 ±20%; Pin 7 - Pin 8 = 0.792 ±20% |
| Excitation Current (Iex) | 97.2mA max. @ 115V, 60Hz, Pin 1 - Pin 4 |
| Secondary (RMS) Parallel | 14V @ 2.6A |
| Secondary No-Load Voltage | Pin 5 - Pin 6 = 16.73V ±2%; Pin 7 - Pin 8 = 16.73V ±2% (@ 115V, 60Hz, Pin 1 - Pin 4) |
Identifiers
| UPC | 623980260396 |
| UNSPSC | 39121301 |
Packaging & Shipping
| Shipping Weight | 1.09 lbs (0.49 kg) |
| Weight (Series Table) | 1.1 lbs |
Construction & Finish
| Profile | Low profile, split bobbin design |
| Insulation Class | Class B, 130 degrees C |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
| Safety Recognition | c UL us recognized |
Purchasing this for your business?
Business account holders get access to exclusive pricing, volume discounts, and dedicated support. Create a free account to get started.
Frequently Asked Questions
What output does the 164J28 provide?▾
With the two secondary windings in series it provides 28V C.T. @ 1.3A (RMS); with them in parallel it provides 14V @ 2.6A (RMS). The power rating is 36VA.
What input voltage does it need?▾
The 164J28 has a single 115V primary and operates on 50/60 Hz. The dual-primary 115/230V equivalent is 162J28.
How is it mounted?▾
It is a P.C. board mount transformer with industry standard pin spacing and four-hole mounting (mounting screws not provided); the series table lists #6 mounting screws.
How large is it?▾
The series mechanical table lists L 2.63 in, W 2.19 in and H 1.56 in for the 36VA size, with a weight of 1.1 lbs.
Can I use only one secondary winding?▾
No. The series data states that units are designed so that all windings must be used, connected either in series or in parallel.
What approvals does it carry?▾
The series is c UL us recognized, and this part is listed as RoHS and REACH compliant. Insulation is Class B (130 degrees C) with a 2,500V RMS hipot.
Related Products
Save 52%164J24 — Transformer, low voltage PCB mount, low profile, 115V, 36VA, 24V C.T. @ 1.5A
Hammond Manufacturing · 164J24
Save 52%164J36 — Transformer, low voltage PCB mount, low profile, 115V, 36VA, 36V C.T. @ 1A
Hammond Manufacturing · 164J36
Save 52%164J20 — Transformer, low voltage PCB mount, low profile, 115V, 36VA, 20V C.T. @ 1.8A
Hammond Manufacturing · 164J20
Save 52%164J48 — Transformer, low voltage PCB mount, low profile, 115V, 36VA, 48V C.T. @ .75A
Hammond Manufacturing · 164J48
Save 52%164J16 — Transformer, low voltage PCB mount, low profile, 115V, 36VA, 16V C.T. @ 2.25A
Hammond Manufacturing · 164J16