Tomzn TOMPD-63LW fuse
The TOMZN TOMPD-63LW is not a traditional fuse. It is a DIN-rail smart protective breaker / energy meter for single-phase 230 V systems, with Wi‑Fi control, overcurrent protection, over/undervoltage protection, leakage-current protection, energy metering, timer functions, and automatic reclose. (tomzn.net)
If you are asking “what fuse does it use?”, the practical answer is: none in the normal service sense. It is a resettable electronic protective device, not a replaceable fuse holder. If it trips, you clear the fault and reset it; if the unit itself fails, you normally replace the whole TOMPD-63LW, not a fuse cartridge. This is an engineering conclusion based on the published product description and manual. (tomzn.net)
Key points:
A fuse is a sacrificial overcurrent device: when current exceeds its limit long enough, its element melts and must be replaced. The TOMPD-63LW is different: it is an active protective switch with sensing, configurable thresholds, display, and app connectivity. In other words, it behaves more like a smart breaker / protector than a fuse. (tomzn.net)
Functionally, the unit combines several subsystems in one enclosure:
For the 63 A version, the published parameter tables show:
That means it is not equivalent to a simple fast fuse. Its protection is configurable, and some trip behavior depends on settings such as delay and recovery logic. From an engineering perspective, that makes it useful for load management and monitoring, but it also means you should not assume “63 A” alone tells you everything about how it protects a circuit. (manuals.plus)
A particularly important point for a user in the United States: the manual explicitly states the device is for 230 V systems and warns that connecting it to 110 V may cause malfunction or damage. So it is not a drop-in substitute for a standard US fuse or breaker on a 120 V branch circuit unless you have independently confirmed suitability, ratings, and code acceptance for your exact installation. That last sentence is an engineering inference from the published voltage specification. (manuals.plus)
Current TOMZN listings still present the TOMPD-63LW as a Wi‑Fi smart switch / energy meter / circuit breaker rather than as a fuse product. The official store page and current catalog-style material describe it as a multifunction protector integrating metering, leakage protection, voltage/current protection, and app control. (tomzn.net)
This fits a broader market trend: compact DIN-rail multifunction smart protectors are increasingly combining measurement, remote control, and protection in one module. The engineering advantage is reduced panel hardware count; the engineering caution is that multifunction consumer devices should still be checked carefully for listing, interrupt capability, and local code acceptance before being used as primary branch protection. The first part is directly documented; the caution is my engineering assessment. (tomzn.net)
If your TOMPD-63LW is “blown” or cutting power, the likely causes are:
Because it is a smart protective device, the correct troubleshooting approach is:
In practical terms:
The manual states that electrical installation must be performed by qualified personnel, with main power disconnected before wiring, and with installation in a dry, ventilated area. (manuals.plus)
From a compliance standpoint, you should verify that this device is acceptable under your local electrical code and insurance requirements before using it in fixed wiring. This is especially relevant in North America, where suitability depends on more than just voltage and current rating. That is an engineering/legal caution rather than a direct claim from TOMZN. (manuals.plus)
Because it is a connected device, there is also a security/privacy consideration: the manual recommends keeping firmware updated, and the device relies on 2.4 GHz Wi‑Fi and the Tuya/Smart Life ecosystem for remote functions. (manuals.plus)
Installation and use guidance from the published manual:
Best practices:
There is some ambiguity in online documentation because TOMZN pages are product listings and some manuals are mirrored by third-party manual sites. However, the sources are consistent on the main point: TOMPD-63LW is a smart multifunction breaker/protector, not a replaceable fuse device. (tomzn.net)
Also note that the exact protection behavior depends on how the thresholds are configured, so two users with the same model may observe different trip behavior. (manuals.plus)
If you want, I can give a more targeted answer for one of these:
The Tomzn TOMPD-63LW is not a fuse. It is a 230 V single-phase smart protective breaker/energy meter with adjustable overcurrent, leakage, voltage protection, Wi‑Fi control, and metering. There is no normal service fuse to replace; if it trips, diagnose and reset it, and if the hardware fails, replace the whole device. It is published for 230 V systems, so for typical US 120 V branch-circuit use, treat it with caution and verify suitability before installation. (tomzn.net)
If you want, send a photo of the label or tell me your exact issue, and I can identify whether you need a setting change, rewiring, or full replacement.