
GANGYUAN
KAN0644-0371C1-A is a same-rating SMD tactile candidate but needs footprint and pinout review.
TS-1187A-C-D-B is a 5.1mm SMD tactile switch rated 50mA at 12V. No pin-compatible replacement is confirmed from the provided data.
12V 50mA matches, but margin is limited.
Candidate bodies and heights differ.
Passive switch; debounce may change.
Kept candidates are indexed.
No verified pin-compatible replacement is available from these candidates.
Review KAN0644-0371C1-A first if a 6x6mm, taller tactile switch can fit.
Footprint, pin map, height, and actuation feel.

GANGYUAN
KAN0644-0371C1-A is a same-rating SMD tactile candidate but needs footprint and pinout review.
| Feature / factor | TS-1187A-C-D-B | KAN0644-0371C1-A | KAN4541-0381B1 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SMD 5.1x5.1x2.0 | SMD 6x6x3.7 | SMD 4.5x4.5x3.8 | SMD 6x6x3.7 / SMD 4.5x4.5x3.8 — larger and taller; KAN4541-0381B1: smaller body, taller | |
| Pinout | 4 pins, map missing | 4 pins, map missing | 4 pins, map missing | 4 pins, map missing — not pin verified; KAN4541-0381B1: not pin verified | |
| Voltage | 12V DC | 12V DC | 12V DC | 12V DC — no extra margin; KAN4541-0381B1: same rating | |
| Current | 50mA | 50mA | 50mA | 50mA — same rating; KAN4541-0381B1: same rating | |
| Application | tactile switch | SPST-NO tactile | 160gf tactile | SPST-NO tactile / 160gf tactile — same switch role; KAN4541-0381B1: lighter feel |
KAN0644-0371C1-A is the closest kept candidate by function and rating, but it needs footprint and pinout review.