diff --git a/esphome/components/mitsubishi_cn105/mitsubishi_cn105.cpp b/esphome/components/mitsubishi_cn105/mitsubishi_cn105.cpp
index 56f1ee1b3f4..3a42616d8a6 100644
--- a/esphome/components/mitsubishi_cn105/mitsubishi_cn105.cpp
+++ b/esphome/components/mitsubishi_cn105/mitsubishi_cn105.cpp
@@ -30,44 +30,53 @@ static constexpr uint8_t STATUS_MSG_ROOM_TEMP = 0x03;
 static constexpr uint8_t PACKET_TYPE_WRITE_SETTINGS_REQUEST = 0x41;
 static constexpr uint8_t PACKET_TYPE_WRITE_SETTINGS_RESPONSE = 0x61;
 
-static constexpr std::array<std::optional<MitsubishiCN105::Mode>, 9> PROTOCOL_MODE_MAP = {
-    std::nullopt,                     // 0x00
+template<auto Unknown, size_t N> struct LookupMap {
+  using value_type = decltype(Unknown);
+  static constexpr auto UNKNOWN_VALUE = Unknown;
+  const std::array<value_type, N> table;
+
+  constexpr value_type lookup(uint8_t raw) const { return (raw < N) ? this->table[raw] : UNKNOWN_VALUE; }
+
+  constexpr bool reverse_lookup(value_type value, uint8_t &out) const {
+    static_assert(N <= std::numeric_limits<uint8_t>::max());
+    if (value == UNKNOWN_VALUE) {
+      return false;
+    }
+    for (uint8_t i = 0; i < static_cast<uint8_t>(N); ++i) {
+      if (this->table[i] == value) {
+        out = i;
+        return true;
+      }
+    }
+    return false;
+  }
+};
+
+template<auto Unknown, class T, std::size_t N> static constexpr auto make_map(const T (&values)[N]) {
+  return LookupMap<Unknown, N>{std::to_array(values)};
+}
+
+static constexpr auto PROTOCOL_MODE_MAP = make_map<MitsubishiCN105::Mode::UNKNOWN>({
+    MitsubishiCN105::Mode::UNKNOWN,   // 0x00
     MitsubishiCN105::Mode::HEAT,      // 0x01
     MitsubishiCN105::Mode::DRY,       // 0x02
     MitsubishiCN105::Mode::COOL,      // 0x03
-    std::nullopt,                     // 0x04
-    std::nullopt,                     // 0x05
-    std::nullopt,                     // 0x06
+    MitsubishiCN105::Mode::UNKNOWN,   // 0x04
+    MitsubishiCN105::Mode::UNKNOWN,   // 0x05
+    MitsubishiCN105::Mode::UNKNOWN,   // 0x06
     MitsubishiCN105::Mode::FAN_ONLY,  // 0x07
     MitsubishiCN105::Mode::AUTO       // 0x08
-};
+});
 
-static constexpr std::array<std::optional<MitsubishiCN105::FanMode>, 7> PROTOCOL_FAN_MODE_MAP = {
+static constexpr auto PROTOCOL_FAN_MODE_MAP = make_map<MitsubishiCN105::FanMode::UNKNOWN>({
     MitsubishiCN105::FanMode::AUTO,     // 0x00
     MitsubishiCN105::FanMode::QUIET,    // 0x01
     MitsubishiCN105::FanMode::SPEED_1,  // 0x02
     MitsubishiCN105::FanMode::SPEED_2,  // 0x03
-    std::nullopt,                       // 0x04
+    MitsubishiCN105::FanMode::UNKNOWN,  // 0x04
     MitsubishiCN105::FanMode::SPEED_3,  // 0x05
     MitsubishiCN105::FanMode::SPEED_4   // 0x06
-};
-
-template<typename T, size_t N>
-static constexpr std::optional<T> lookup(const std::array<std::optional<T>, N> &table, uint8_t value) {
-  return (value < N) ? table[value] : std::nullopt;
-}
-
-template<typename T, size_t N>
-static constexpr bool reverse_lookup(const std::array<std::optional<T>, N> &table, T value, uint8_t &placeholder) {
-  for (size_t i = 0; i < N; ++i) {
-    const auto &table_value = table[i];
-    if (table_value.has_value() && table_value == value) {
-      placeholder = i;
-      return true;
-    }
-  }
-  return false;
-}
+});
 
 static constexpr uint8_t checksum(const uint8_t *bytes, size_t length) {
   return static_cast<uint8_t>(0xFC - std::accumulate(bytes, bytes + length, uint8_t{0}));
@@ -323,11 +332,11 @@ bool MitsubishiCN105::parse_status_settings_(const uint8_t *payload, size_t len)
 
   if (!this->pending_updates_.contains(UpdateFlag::MODE)) {
     const bool i_see = payload[3] > 0x08;
-    this->status_.mode = lookup(PROTOCOL_MODE_MAP, payload[3] - (i_see ? 0x08 : 0)).value_or(Mode::UNKNOWN);
+    this->status_.mode = PROTOCOL_MODE_MAP.lookup(payload[3] - (i_see ? 0x08 : 0));
   }
 
   if (!this->pending_updates_.contains(UpdateFlag::FAN)) {
-    this->status_.fan_mode = lookup(PROTOCOL_FAN_MODE_MAP, payload[5]).value_or(FanMode::UNKNOWN);
+    this->status_.fan_mode = PROTOCOL_FAN_MODE_MAP.lookup(payload[5]);
   }
 
   return true;
@@ -382,7 +391,7 @@ void MitsubishiCN105::set_target_temperature(float target_temperature) {
 
 void MitsubishiCN105::set_mode(Mode mode) {
   uint8_t placeholder;
-  if (!reverse_lookup(PROTOCOL_MODE_MAP, mode, placeholder)) {
+  if (!PROTOCOL_MODE_MAP.reverse_lookup(mode, placeholder)) {
     ESP_LOGD(TAG, "Setting invalid mode: %u", static_cast<uint8_t>(mode));
     return;
   }
@@ -392,7 +401,7 @@ void MitsubishiCN105::set_mode(Mode mode) {
 
 void MitsubishiCN105::set_fan_mode(FanMode fan_mode) {
   uint8_t placeholder;
-  if (!reverse_lookup(PROTOCOL_FAN_MODE_MAP, fan_mode, placeholder)) {
+  if (!PROTOCOL_FAN_MODE_MAP.reverse_lookup(fan_mode, placeholder)) {
     ESP_LOGD(TAG, "Setting invalid fan mode: %u", static_cast<uint8_t>(fan_mode));
     return;
   }
@@ -432,12 +441,12 @@ void MitsubishiCN105::apply_settings_() {
     }
 
     if (this->pending_updates_.contains(UpdateFlag::MODE) &&
-        reverse_lookup(PROTOCOL_MODE_MAP, this->status_.mode, payload[4])) {
+        PROTOCOL_MODE_MAP.reverse_lookup(this->status_.mode, payload[4])) {
       payload[1] |= 0x02;
     }
 
     if (this->pending_updates_.contains(UpdateFlag::FAN) &&
-        reverse_lookup(PROTOCOL_FAN_MODE_MAP, this->status_.fan_mode, payload[6])) {
+        PROTOCOL_FAN_MODE_MAP.reverse_lookup(this->status_.fan_mode, payload[6])) {
       payload[1] |= 0x08;
     }