Hammond 161D20 1VA 20V Center-Tapped 115V PCB Mount Transformer
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Create Free Business AccountKey Features
- 1 VA rating with 20V C.T. @ 45ma secondary (series connection)
- Parallel secondary connection delivers 10V @ 90ma
- Single 115V primary, 60 Hz only
- Vertical PC board mount, split bobbin, concentric wound
- Low primary-to-secondary coupling - no electrostatic shield required
- Class B insulation (130 degrees C), hipot 2,000V RMS
- CSA certified (File # LR3902) and UL recognized (File #E207860)
- RoHS and REACH compliant
The 161D20 is a low voltage, vertical PC board mount power transformer with a economical single 115V primary for 60 Hz only. Rated 1 VA, it is intended for compact low-power supplies, logic and control boards that need a small isolated AC secondary.
The secondary is made of two windings. Connected in series they deliver 20V C.T. @ 45ma; connected in parallel they deliver 10V @ 90ma. The 20V center-tapped secondary is one of 20 output voltages the series offers between 5 and 120VAC RMS.
The 1 VA size is concentric wound. Per the 161 series mechanical table, overall dimensions are 1.00 x 1.38 x 0.83 in (A x B x C) with 0.02 x 0.04 in pins, and the part ships at 0.13 lbs (0.06 kg). If you need both 115V and 230V input, the ordering table lists 160D20 as the dual-primary equivalent with the same 1 VA secondary rating.
Construction uses a split bobbin with low primary-to-secondary coupling, so no electrostatic shield is required. Insulation is Class B (130 degrees C) and hipot tested to 2,000V RMS. The series is CSA certified (File # LR3902) and UL recognized (File #E207860), and this part is listed as RoHS and REACH compliant.
Ideal For
- 1 VA PC board mounted power supplies
- Center-tapped or parallel low voltage secondary supply
- 115V, 60 Hz equipment
- Control and electronic circuit boards needing an isolated AC supply
Overview
| Series | 160-161 Series (Low Voltage PC Board Mount, 0.5 VA to 24 VA) |
| Mounting | P.C. board mount, vertical |
| Description | Transformer, low voltage PCB mount, 115V primary, 1VA, 20V C.T. @ 45ma sec |
| Part Number | 161D20 |
| Product Type | Low voltage PC board mount power transformer |
| Dual Primary 115/230V Equivalent | 160D20 |
Dimensions
| Dimension E | 1.20 in |
| Dimension G | 0.25 in |
| Overall Dimension A | 1.00 in |
| Overall Dimension B | 1.38 in |
| Overall Dimension C | 0.83 in |
| D Pin (Thickness X Width) | 0.02 x 0.04 in |
Electrical
| Hipot | 2,000V RMS |
| Primary | Single primary 115V |
| Frequency | 60 Hz only |
| Power Rating (VA) | 1 |
| Secondary (RMS) Series | 20V C.T. @ 45ma |
| Secondary (RMS) Parallel | 10V @ 90ma |
| Primary To Secondary Coupling | Low - no electrostatic shield required |
Identifiers
| UPC | 623980211039 |
| UNSPSC | 39121301 |
Packaging & Shipping
| Shipping Weight | 0.13 lbs (0.06 kg) |
Construction & Finish
| Bobbin | Split bobbin design |
| Winding | Concentric wound |
| Insulation Class | Class B - 130 degrees C |
Compliance & Certifications
| UL | Recognized (File #E207860) |
| CSA | Certified (File # LR3902) |
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
What output does the 161D20 provide?▾
Its two secondary windings give 20V C.T. @ 45ma when connected in series, or 10V @ 90ma when connected in parallel. The transformer is rated 1 VA.
Can the 161D20 run on 230V?▾
No. The 161D20 has a single 115V primary rated for 60 Hz only. The dual-primary 115/230V, 50/60 Hz equivalent is 160D20.
Does it need an electrostatic shield?▾
No. The split bobbin design has low primary-to-secondary coupling, so no electrostatic shield is required.
What certifications and insulation ratings apply?▾
The series is CSA certified (File # LR3902) and UL recognized (File #E207860), with Class B insulation rated 130 degrees C and a hipot of 2,000V RMS. The part is also listed as RoHS and REACH compliant.
How big is the 161D20?▾
The 161 series mechanical table lists overall dimensions of 1.00 x 1.38 x 0.83 in (A x B x C) for the 1 VA size. Shipping weight is 0.13 lbs (0.06 kg).
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