What this 20-position ZPD header does on the board
The shrouded 4-wall housing and locking ramp fastening give it a vibration-resistant mate with the matching ZPD receptacle — the ramp clicks into place and won't back out under cable tug.

JST Sales America Inc., ZPD series, Board to Cable/Wire header, 20 positions, 2 rows, 1.50 mm pitch, shrouded 4-wall, locking ramp, surface mount right angle, tin-plated contacts, 2 A, 100 V, UL94 V-0, -25°C to 85°C.
| Parameter | Value |
|---|---|
| Series | ZPD |
| Gender | Outer Shroud Contact |
| Mounting type | Surface Mount, Right Angle |
| Connector type | Header |
| Fastening type | Locking Ramp |
| Voltage rating | 100V |
| Current rating | 2A |
| Operating temperature | -25°C ~ 85°C |
| Contact material | Copper Alloy |
| Insulation color | Natural |
| Insulation height | 0.309\" (7.85mm) |
| Insulation material | Polyamide (PA), Nylon |
| Material flammability rating | UL94 V-0 |
| Style | Board to Cable/Wire |
| Package | Tape & Reel (TR) Cut Tape (CT) |
| Shrouding | Shrouded - 4 Wall |
| Termination | Solder |
| Contact shape | Rectangular |
| Rows | 2 |
| Pitch | 0.059\" (1.50mm) |
| Positions | 20 |
| Contact finish - post | Tin |
| Contact finish - mating | Tin |
The shrouded 4-wall housing and locking ramp fastening give it a vibration-resistant mate with the matching ZPD receptacle — the ramp clicks into place and won't back out under cable tug.
SM20B-ZPDSS-TF is listed as RoHS non-compliant. For a RoHS-compliant alternative with the same footprint and ratings, use SM20B-ZPDSS-TF(LF)(SN).
The mating half is a ZPD series receptacle (crimp or IDC type) with 20 positions. The locking ramp on the header engages with the receptacle latch for a vibration-resistant connection.