diff --git a/projects/ngx-sp-infra/package-lock.json b/projects/ngx-sp-infra/package-lock.json
index b0e1b76..4569135 100644
--- a/projects/ngx-sp-infra/package-lock.json
+++ b/projects/ngx-sp-infra/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "ngx-sp-infra",
-  "version": "2.1.5",
+  "version": "2.1.6",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "ngx-sp-infra",
-      "version": "2.1.5",
+      "version": "2.1.6",
       "dependencies": {
         "tslib": "^2.6.1"
       },
diff --git a/projects/ngx-sp-infra/package.json b/projects/ngx-sp-infra/package.json
index 1a6bd41..748ca9c 100644
--- a/projects/ngx-sp-infra/package.json
+++ b/projects/ngx-sp-infra/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ngx-sp-infra",
-  "version": "2.1.5",
+  "version": "2.1.6",
   "description": "Biblioteca de utilitários da Infra.",
   "author": "P&D",
   "keywords": [
diff --git a/projects/ngx-sp-infra/src/lib/directives/required.directive.ts b/projects/ngx-sp-infra/src/lib/directives/required.directive.ts
index 1702c61..2c14040 100644
--- a/projects/ngx-sp-infra/src/lib/directives/required.directive.ts
+++ b/projects/ngx-sp-infra/src/lib/directives/required.directive.ts
@@ -56,7 +56,7 @@ export class RequiredDirective implements OnInit, OnChanges {
   get showMarker(): boolean { return this._showMarker; }
 
   /** Identificador único para o elemento <span> criado. */
-  @Input("sisID") spanID: string = "";
+  @Input("requiredID") spanID: string = "";
 
 
   ngOnInit(): void {
diff --git a/projects/ngx-sp-infra/src/lib/widgets/lib-combobox/lib-combobox.component.html b/projects/ngx-sp-infra/src/lib/widgets/lib-combobox/lib-combobox.component.html
index bbb21ab..0f13f06 100644
--- a/projects/ngx-sp-infra/src/lib/widgets/lib-combobox/lib-combobox.component.html
+++ b/projects/ngx-sp-infra/src/lib/widgets/lib-combobox/lib-combobox.component.html
@@ -1,4 +1,4 @@
-<label *ngIf="labelText && labelText != ''" [libRequired]="isRequired" class="form-label fw-bold">{{ labelText }}</label>
+<label *ngIf="labelText && labelText != ''" [libRequired]="isRequired" [requiredID]="comboboxID" class="form-label fw-bold">{{ labelText }}</label>
 <div class="input-group dropdown flex-fill glb-max-height-350px">
 
    <!-- Este elemento ng-content com o atributo [btnLeft] permite que o usuário final forneça conteúdo personalizado para ser exibido no lado esquerdo do combobox de pesquisa.
diff --git a/projects/ngx-sp-infra/src/lib/widgets/lib-combobox/lib-combobox.component.ts b/projects/ngx-sp-infra/src/lib/widgets/lib-combobox/lib-combobox.component.ts
index cbec3f9..2983a36 100644
--- a/projects/ngx-sp-infra/src/lib/widgets/lib-combobox/lib-combobox.component.ts
+++ b/projects/ngx-sp-infra/src/lib/widgets/lib-combobox/lib-combobox.component.ts
@@ -64,6 +64,8 @@ export class LibComboboxComponent implements OnInit, AfterViewInit, OnDestroy {
   protected invalid: boolean = false;
   protected dirty: boolean = false;
   protected touched: boolean = false;
+
+  protected comboboxID: string;
   // #endregion PROTECTED
 
   // #region PRIVATE
@@ -102,9 +104,9 @@ export class LibComboboxComponent implements OnInit, AfterViewInit, OnDestroy {
   @Input() public labelText?: string;
 
   /** (opcional) Define se o campo é obrigatório, vai exibir o '*' vermelho ao lado do label (se ele estiver presente)
-   * @type {boolean}
-   * @default false */
-  @Input() public libRequired: boolean = false;
+   * @type {boolean} */
+  @Input()
+  public libRequired?: boolean;
 
   /** (opcional) Define se o campo está desabilitado. Deve ser usado para validações de habilitação dinâmica do campo
    * @type {boolean}
@@ -168,6 +170,9 @@ export class LibComboboxComponent implements OnInit, AfterViewInit, OnDestroy {
   constructor() { }
 
   ngOnInit(): void {
+    this.comboboxID = `lib-combobox-${Math.random() * 100}`;
+    console.log("comboboxID: ", this.comboboxID);
+
     this.adjustDropdownWidth();
 
     this.setValidator();
@@ -180,7 +185,7 @@ export class LibComboboxComponent implements OnInit, AfterViewInit, OnDestroy {
 
   ngOnChanges(changes: SimpleChanges): void {
     if (changes["comboboxList"]?.currentValue) this.updateSelectedValue();
-    if (changes["libRequired"]?.currentValue) this.setValidator();
+    if (changes["libRequired"]?.currentValue != undefined) this.setValidator();
     if (changes["outerControl"]?.currentValue) {
       this.setValidator();
       this.updateSelectedValue((changes["outerControl"].currentValue as FormControl).value);
@@ -245,16 +250,28 @@ export class LibComboboxComponent implements OnInit, AfterViewInit, OnDestroy {
     }
   }
 
+  /** Serve para aplicar ou remover o Validator.required do controle.
+   * Por padrão ele priorizará a propriedade libRequired para esta validação. */
   private setValidator(): void {
-    console.log("Validação validator", this._outerControl.hasValidator(Validators.required) || this.libRequired === true);
-    
-    if (this._outerControl.hasValidator(Validators.required) || this.libRequired === true) {
-      this.innerControl.addValidators(Validators.required);
-      this.isRequired = true;
+    if (this.libRequired !== undefined) {
+      if (this.libRequired) {
+        this.innerControl.addValidators(Validators.required);
+        this.isRequired = true;
+      }
+      else {
+        this.innerControl.removeValidators(Validators.required);
+        this.isRequired = false;
+      }
     }
     else {
-      this.innerControl.removeValidators(Validators.required);
-      this.isRequired = false;
+      if (this._outerControl.hasValidator(Validators.required)) {
+        this.innerControl.addValidators(Validators.required);
+        this.isRequired = true;
+      }
+      else {
+        this.innerControl.removeValidators(Validators.required);
+        this.isRequired = false;
+      }
     }
   }