Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Hamlin: MDSR-4 17-23 MDSR-4 22-28 MDSR-4 27-38 MDSR-4 12-38 MDSR-4 22-33 MDSR-4 17-28 MDSR-4 17-38 MDSR-4 12-28 Littelfuse: MDSR-4 12-18 MDSR-4-22-38 MDSR-4-12-23 MDSR-4-27-33 MDSR-4-32-38 MDSR-4-17-38 MDSR-4-27-38 MDSR-4-12-28 MDSR-4-22-33 MDSR-4-17-28 MDSR-4-17-23 MDSR-4-22-28 MDSR-4-12-38 MDSR-4-12-18