{"product_id":"freeze-dryer-with-refrigerated-cold-trap-main-unit-4l-trap-cooling-temp-45-c-dc-401","title":"Yamato DC401 Freeze Dryer, 4L (−45°C Refrigerated Cold Trap)","description":"\u003ch2\u003eYamato DC401 Freeze Dryer, 4L (−45°C Refrigerated Cold Trap) Overview\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eYamato Scientific DC401 Freeze Dryer with Refrigerated Cold Trap\u003c\/strong\u003e is a benchtop lyophilizer built around a 4 L drying capacity and a trap cooling temperature of -45°C. LabSupplies.com supplies this main unit as an authorized dealer, delivering a genuine Yamato Scientific instrument for sample preservation, reagent stabilization, and small-batch lyophilization.\u003c\/p\u003e\u003cp\u003eA stainless steel cylindrical cold trap, measuring Dia. 153 × H235 mm, captures sublimated moisture with a 0.6 L dehumidifying capacity. The Hot Gas Bypass System refreezes and releases ice smoothly, eliminating manual scraping. A Pirani vacuum gauge monitors chamber pressure, while automatic safety vacuum venting prevents pump-oil backflow during power loss.\u003c\/p\u003e\u003cp\u003eEach unit runs on AC115V, 12 A (50\/60 Hz) and reaches -45°C from 20°C in roughly 50 minutes. External dimensions are 300 × 450 × 920 mm with a weight near 60 kg, and integrated casters keep the system mobile. Manufactured in Japan, it ships with vacuum silicone grease and a vacuum hose.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefrigerated cold trap:\u003c\/strong\u003e stainless steel cylinder reaches -45°C, cooling from 20°C in about 50 minutes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHot Gas Bypass defrost:\u003c\/strong\u003e refreezes and removes accumulated ice smoothly without manual scraping.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContaminant-free venting:\u003c\/strong\u003e automatic safety vacuum venting prevents oil backflow on power-off or power failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePirani vacuum gauge:\u003c\/strong\u003e monitors chamber pressure throughout the lyophilization cycle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLayered safety devices:\u003c\/strong\u003e electric leakage breaker with overcurrent protection, refrigerator overload relay, back-flow prevention valve, and a safety valve linked to the vacuum-pump service receptacle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMobile benchtop design:\u003c\/strong\u003e 400 W air-cooled refrigeration with R404A refrigerant, mounted on casters for easy relocation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eHow to Choose the Right Freeze Dryer\u003c\/h2\u003e\u003cp\u003eMatching a freeze dryer to your workflow means weighing trap temperature, capacity, site power, and defrost handling against the samples you process. Use these axes to confirm the DC401 fits your lab.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrap cooling temperature:\u003c\/strong\u003e a -45°C trap suits aqueous samples and standard buffers; lower-eutectic solvents may require a colder trap.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrying capacity:\u003c\/strong\u003e the 4 L chamber and 0.6 L dehumidifying capacity define how much moisture you can collect per run.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage and power:\u003c\/strong\u003e verify your circuit supports the chosen 115V or 220V configuration before ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDefrost method:\u003c\/strong\u003e the Hot Gas Bypass System removes ice without scraping, reducing downtime between batches.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFootprint and mobility:\u003c\/strong\u003e confirm the 300 × 450 × 920 mm body and ~60 kg weight suit your bench, then use the casters to reposition.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration needs:\u003c\/strong\u003e this is the main unit; budget separately for drying chamber, manifold, mounting flasks, caps, and glass containers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCapacity\u003c\/td\u003e\n\u003ctd\u003e4 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e115V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eBenchtop freeze dryer with refrigerated cold trap\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrap Cooling Temperature\u003c\/td\u003e\n\u003ctd\u003e-45°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTime to Reach Minimum Temperature\u003c\/td\u003e\n\u003ctd\u003e50 min (20°C to -45°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDehumidifying Capacity\u003c\/td\u003e\n\u003ctd\u003e0.6 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Capacity\u003c\/td\u003e\n\u003ctd\u003e~4 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigeration System\u003c\/td\u003e\n\u003ctd\u003eAir cooling, 400 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR404A (300 g ±5 g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVacuum Gauge\u003c\/td\u003e\n\u003ctd\u003ePirani vacuum gauge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrap Defrost\u003c\/td\u003e\n\u003ctd\u003eHot Gas Bypass System (ice refrozen and removed smoothly without manual scraping)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContaminant-Free System\u003c\/td\u003e\n\u003ctd\u003eAutomatic safety vacuum venting prevents oil backflow on power-off or power failure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrap Material \/ Shape\u003c\/td\u003e\n\u003ctd\u003eCylinder, stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrap Dimensions\u003c\/td\u003e\n\u003ctd\u003eDia. 153 × H235 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExhaust Port\u003c\/td\u003e\n\u003ctd\u003eDia. 17 mm (vacuum pump connection)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Ambient Temperature\u003c\/td\u003e\n\u003ctd\u003e5°C to 30°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Devices\u003c\/td\u003e\n\u003ctd\u003eElectric leakage breaker with overcurrent protection, refrigerator overload relay, back-flow prevention valve, safety valve linked with vacuum-pump service receptacle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrain\u003c\/td\u003e\n\u003ctd\u003eVacuum hose with stopper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMobility\u003c\/td\u003e\n\u003ctd\u003eHighly mobile on casters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e300 × 450 × 920 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e~60 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Accessories\u003c\/td\u003e\n\u003ctd\u003eVacuum silicone grease, vacuum hose\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConfiguration\u003c\/td\u003e\n\u003ctd\u003eMain unit — drying chamber, manifold, mounting flasks, flask caps and glass container sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Source\u003c\/td\u003e\n\u003ctd\u003eAC115V, 12 A (50\/60 Hz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eAvailable Sizes and Configurations\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003cth\u003eConfiguration\u003c\/th\u003e\n\u003cth\u003ePack\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDC-401-115V\u003c\/td\u003e\n\u003ctd\u003e115V\u003c\/td\u003e\n\u003ctd\u003eEA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDC-401-220V\u003c\/td\u003e\n\u003ctd\u003e220V\u003c\/td\u003e\n\u003ctd\u003eEA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eDocumentation\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.yamato-usa.com\/web\/content\/15346\" target=\"_blank\" rel=\"noopener\"\u003eProduct Brochure\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.yamato-usa.com\/shop\/yamato-dc401-pirani-vacuum-gauge-freeze-dryer-41\" target=\"_blank\" rel=\"noopener\"\u003eYamato Scientific Official Product Page\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eMore in This Series\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/dc401-with-12-port-flask-mounting-chamber-5-pcs-of-120ml-dry-flask-with-straight-glass-joint-cap-dc-401a\"\u003eDc401 With 12 Port Flask Mounting Chamber \u0026amp; 5 Pcs. Of 120mL Dry Flask With Straight Glass Joint \u0026amp; Cap\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/dc401-with-manifold-a-8-port-5-pcs-of-120ml-dry-flask-with-straight-glass-joint-and-cap-dc-401b\"\u003eDc401 With Manifold A (8 Port) \u0026amp; 5 Pcs. Of 120mL Dry Flask With Straight Glass Joint And Cap\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Buy From LabSupplies.com\u003c\/h2\u003e\u003cp\u003eLabSupplies.com is an authorized Yamato Scientific dealer, so every DC401 ships as a genuine factory unit backed by the manufacturer warranty. Our team supports procurement specialists and lab managers from quote-free purchase through delivery.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuthorized Yamato Scientific dealer:\u003c\/strong\u003e genuine instruments with full manufacturer warranty.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIn stock:\u003c\/strong\u003e ready to ship from USA inventory.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect purchase:\u003c\/strong\u003e order online without back-and-forth quoting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLab-equipment specialists:\u003c\/strong\u003e dedicated support for spec and configuration questions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat trap cooling temperature does the DC401 reach?\u003c\/h3\u003e\u003cp\u003eThe DC401 cold trap reaches -45°C. It cools from 20°C to -45°C in approximately 50 minutes, supporting aqueous and standard buffer lyophilization.\u003c\/p\u003e\n\u003ch3\u003eWhat is the drying and dehumidifying capacity?\u003c\/h3\u003e\u003cp\u003eThe DC401 provides roughly 4 L of internal drying capacity with a 0.6 L dehumidifying (ice-collection) capacity per run.\u003c\/p\u003e\n\u003ch3\u003eWhat voltage options are available, and what power does it draw?\u003c\/h3\u003e\u003cp\u003eThe DC401 is offered in 115V and 220V configurations. The 115V version operates on AC115V, 12 A at 50\/60 Hz, so confirm your circuit before ordering.\u003c\/p\u003e\n\u003ch3\u003eWhat is the cold trap made of, and how is it defrosted?\u003c\/h3\u003e\u003cp\u003eThe cold trap is a stainless steel cylinder measuring Dia. 153 × H235 mm. A Hot Gas Bypass System refreezes and removes ice smoothly without manual scraping.\u003c\/p\u003e\n\u003ch3\u003eWhat are the external dimensions and weight?\u003c\/h3\u003e\u003cp\u003eExternal dimensions are 300 × 450 × 920 mm (W×D×H) with a weight of approximately 60 kg. Built-in casters keep the unit mobile on the bench.\u003c\/p\u003e\n\u003ch3\u003eIs the drying chamber and glassware included?\u003c\/h3\u003e\u003cp\u003eNo. The DC401 is sold as the main unit. The drying chamber, manifold, mounting flasks, flask caps, and glass container are sold separately. Vacuum silicone grease and a vacuum hose are included.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n    {\n      \"@type\": \"Product\",\n      \"@id\": \"https:\/\/labsupplies.com\/products\/freeze-dryer-with-refrigerated-cold-trap-main-unit-4l-trap-cooling-temp-45-c-dc-401#product\",\n      \"name\": \"Yamato DC401 Freeze Dryer With Refrigerated Cold Trap Main Unit 4L . 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