# DC/DC converter module

Board-mounted DC/DC converter modules, each drawn from its maker's data sheet: the case at its height above the board, and each pin at its place, with its section and length below the board. Pin 1 is at the origin, the case sits on the board (the XY plane) above it, and the pins go down through the board. The case and each pin are their own solids.

`model_name` picks the series. Every voltage of a series has the same case and pins, so one preset stands for the series (for example R-78E5.0-0.5 and R-78E3.3-0.5 are both `R-78E-0.5`). TMR 1, TEN 10 and TEN 20 come with a single or a dual output; the dual one has the common pin the single one lacks.

## Source

RECOM data sheets at `https://recom-power.com/pdf/Innoline/<series>.pdf`, Dimension Drawing (mm), tolerances xx.x ±0.5 and xx.xx ±0.25:

| Series | Edition, page | Case L x W x H | Case above the board | Pins | Pin length | Pin places | Weight |
|---|---|---|---|---|---|---|---|
| R-78E-0.5 | REV.: 9/2025, p. 3 | 11.6 x 8.5 x 10.4 | 0.51 | 3, 0.50 x 0.25 | 4.10 | pin 1 3.21 from the end, 2.54 pitch, the row 2.00 from one face | 2 g |
| R-78B-2.0 | REV.: 5/2021, p. 5 | 11.5 x 8.5 x 17.5 | 0.51 | 3, 0.64 x 0.64 | 4.10 | pin 1 3.21 from the end, 2.54 pitch, the row 1.2 from one face | 4.0 g |
| R-78HB-0.5 | REV.: 5/2019, p. 5 | 11.5 x 8.5 x 17.5 | 0.51 | 3, 0.70 x 0.25 | 4.10 | pin 1 3.21 from the end, 2.54 pitch, the row 2.00 from one face | 4 g |
| R-78S (R-78S-0.1) | REV.: 5/2018, p. 4 | 11.6 x 8.5 x 10.4 | 0.51 | 4, 0.70 x 0.25 | 4.10 | pin 1 2.00 from the end, pin 4 7.62 from pin 1, the row 2.00 from one face | 2 g |

TRACO POWER data sheets at `https://www.tracopower.com/products/<series>.pdf`, Outline Dimensions, tolerances ±0.5, pins ±0.05:

| Series | Edition, page | Case L x W x H | Case above the board | Pins | Pin length | Pin places | Weight |
|---|---|---|---|---|---|---|---|
| TSR 1 (tsr1) | Rev. April 15, 2026, p. 4 | 11.7 x 7.5 x 10.1 | 0.5 | 3, 0.50 x 0.25 | 4.1 | 2 x 2.54, pin 3 3.3 from the end, the row 5.5 from one face | 1.9 g |
| TMR 1 (tmr1) | Rev. April 15, 2026, p. 4 | 17.0 x 7.62 x 11.0 | 0.5 | 0.5 x 0.25 | 3.2 | pin 1 2.15 from the end, then 2.54, 5.08, 2.54, 2.54 to pins 2, 4, 5, 6; the row 2.5 from one face | 3.1 g |
| TEN 10 (ten10) | p. 3 (page 4: Rev. August 8, 2025) | 50.8 x 25.4 x 10.2 | on its insulated baseplate | 1.0 dia. | 6.0 | bottom view: pins 1 and 2 15.2 from one end, 5.08 apart, pin 2 10.2 from the long side; pins 3, 4, 5 20.32 further, 10.16 apart, pin 5 2.5 from the long side | 32 g |
| TEN 20 (ten20) | Rev. September 16, 2025, p. 3 | 50.8 x 25.4 x 10.2 | on its insulated baseplate | 1.0 dia. | 6.0 | bottom view: pins 3, 4, 5 15.2 from one end, 10.16 apart, pin 5 2.54 from the long side; pins 6, 2, 1 20.32 further, at 2.54, 2.54 + 7.62 and + 5.08 from the long side | 36 g |

The TMR 1 single-output part has no pin 5; the TEN 10 and TEN 20 single-output parts have no pin 4 (the pin-out tables). The TEN drawings are bottom views; the part mirrors them into a top view. The case height is from the board to the top, so a case standing above the board on its feet starts at the drawn height above it.

**Proportions, for looks only:** none of the cases' details (the RECOM feet, embossed logos and markings, the TEN case's seam). Each SIP case is one block. The TEN case's metal wall is 0.3 thick (the sheets don't dimension it), round a potting block that fills it down to the board; the insulated baseplate is drawn as part of the potting. Each pin runs from its end below the board up to the case's bottom face.

**Materials**, as the sheets' physical specifications name them: the RECOM and TRACO SIP cases are plastic, potted with silicone (R-78S with epoxy), and are modelled as one plastic block, `ptfe`. TEN 10's case is chrome-nickel plated steel (`steel-generic`) potted with epoxy (`ptfe`); TEN 20's is nickel-plated copper (`copper`) potted with silicone rubber (`silicone-rubber`). The pins are copper. The SIP cases are drawn black, the TEN cases metal grey.

**Mass** against the sheets' weights. The SIP blocks come out a little light, and TEN 20 well short: its silicone potting (1.0 g/cm³ here) and thin wall don't account for the components inside. The materials are what the parts are made of, not picked to hit the weight.

| Series | Model | Data sheet |
|---|---|---|
| R-78E-0.5 | 2.03 g | 2 g |
| R-78B-2.0 | 3.49 g | 4.0 g |
| R-78HB-0.5 | 3.46 g | 4 g |
| R-78S | 2.05 g | 2 g |
| TSR 1 | 1.76 g | 1.9 g |
| TMR 1 (single) | 2.83 g | 3.1 g |
| TEN 10 (dual) | 32.3 g | 32 g |
| TEN 20 (dual) | 20.1 g | 36 g |

The old catalogue's entries for these series have no models; each names the maker's series and maps to its preset. Its other converters (Artesyn, Bothhand, Cincon, Mean Well, Murata, XP Power, RECOM R5, R-78HB-0.5L with bent pins, TRACO TMR, TMR 1SM, and TEN 10 and TEN 20 without single or dual named) aren't here yet; see `COVERAGE.md`.