# Mustafa7 - why is solderjumper's ftype simplech...

Channel: #contributor
Source: https://discord.com/channels/1233487248129921135/1534233949071474800
Started: 2026-08-04T16:17:58.712000+00:00
Last activity: 2026-08-04T20:27:28.385000+00:00

## Mustafa7 — 2026-08-04T16:17:58.147000+00:00

why is `solderjumper`'s ftype `simple_chip`?
Attachment: Screenshot_2026-08-04_at_9.47.36_PM.png — https://community.tscircuit.com/media/1534233948773683421

## Mustafa7 — 2026-08-04T16:20:13.629000+00:00

[attachment]
Attachment: Screenshot_2026-08-04_at_9.50.07_PM.png — https://community.tscircuit.com/media/1534234517089550507

## Seve — 2026-08-04T16:27:16.232000+00:00

probably a bug

## Seve — 2026-08-04T16:27:28.159000+00:00

simple_chip is a backup in many cases

## Mustafa7 — 2026-08-04T16:40:36.970000+00:00

What should it be then? There is no "simple_solder_jumper" type

## Seve — 2026-08-04T16:41:00.600000+00:00

sometimes we can propose a new one but a solder jumper is more like a jumper

## Seve — 2026-08-04T16:41:05.730000+00:00

wondering why this is coming up btw

## Mustafa7 — 2026-08-04T16:51:52.226000+00:00

for this, was trying to add solderjumper for textbounds of trace-solver input

## Mustafa7 — 2026-08-04T16:51:55.409000+00:00

nvm

## astrimid — 2026-08-04T20:20:07.815000+00:00

> What should it be then? There is no "simple_solder_jumper" type

in SPICE modeled as a resistor with very small resistance and a switch.  On schematics, zero ohm resistor with "optional" annotation. In PCB, it's probably just footprint, pads with solder mask or copper trace which acts as "do not place" constraint

## astrimid — 2026-08-04T20:22:42.464000+00:00

another possibility is a fuse

## astrimid — 2026-08-04T20:27:28.385000+00:00

As I understand, there are two solder jumpers: normally open (jumper_open, very close pads) and normally closed (jumper_bridge, net tie)