# tt_thermal_throttle_limit_celsius

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## Name

### Prometheus Metric Name

```
tt_thermal_throttle_limit_celsius
```

### Metric Path (tt-telemetry)

Schema:

```
{hostname}/tray{tray}/chip{chip}/tt_thermal_throttle_limit_celsius
```

Example path:

```
bh-glx-c09u02/tray1/chip2/tt_thermal_throttle_limit_celsius
```

## Description

The thermal throttle threshold in degrees Celsius. When the ASIC temperature reaches this limit, the device will begin thermal throttling to reduce power and temperature. Compare with `tt_asic_temperature_celsius` to monitor proximity to the throttle threshold. This metric is only available on devices whose firmware supports reporting the throttle limit.

## Values

**Type:** Floating Point

**Units:** Degrees Celsius

**Allowable values:**
A floating-point number representing the throttle temperature threshold. For example, `95.0` means the device will begin throttling at 95 degrees Celsius.

## Related Metrics

|Metric|Description|
|---|---|
|[tt_asic_temperature_celsius](tt_asic_temperature_celsius.md)|The current ASIC temperature. Compare against this limit to monitor proximity to throttling.|
|[tt_thermal_shutdown_limit_celsius](tt_thermal_shutdown_limit_celsius.md)|The thermal shutdown threshold, which is the hard limit above the throttle threshold.|

## Prometheus Labels

|Label Name|Value|
|---|---|
|hostname|The host from which the metric was collected.|
|hall|The datacenter hall where the host is located. Sourced from the Factory System Descriptor (FSD).|
|aisle|The datacenter aisle where the host is located. Sourced from the Factory System Descriptor (FSD).|
|rack|The rack number where the host is located. Sourced from the Factory System Descriptor (FSD).|
|shelf_u|The shelf U position in the rack where the host is located. Sourced from the Factory System Descriptor (FSD).|
|tray|The tray (UBB) that the device is located on.|
|chip|The ASIC location within the tray.|
|unit|The unit of measurement. Always `"°C"` for this metric.|