Transformer 12V 2A (220VAC → 12VAC) – Single Secondary (0–12V)

Transformer 12V 2A (220VAC → 12VAC) – Single Secondary (0–12V) 🔌 Overview This is a step‑down EI transformer that converts mains 220 VAC to a single 12 VAC (RMS) secondary at 2 A nominal. It is a single‑winding (0–12 V) unit — not a 12‑0‑12 center‑tapped model — making it ideal for compact linear power supplies and low‑voltage AC applications. 📐 Specifications Spec Value Primary (Input) 220 VAC ±10%, 50/60 Hz Secondary (Output) 12 VAC (RMS), single winding (0–12 V) — NOT center‑tapped Rated current 2 A (continuous, ambient ≤ 40 °C) Apparent power ~24 VA Core / type EI laminated steel, chassis mount Regulation Typical of EI cores; varies with load and batch Insulation Mains‑rated; use proper fusing & strain relief Leads Primary: 2 leads • Secondary: 2 leads (0 & 12 V) Notes: Apparent power is approximately 24 VA (12 V × 2 A). Output voltage is rated at nominal load; actual no‑load voltage will read higher, and drops under load as normal for EI transformers. 🧰 Wiring & Integration For a DC supply, connect the 12 VAC secondary to a full‑bridge rectifier and smoothing capacitor. As a rule of thumb, a 12 VAC secondary yields about ~15–16 V DC no‑load after a bridge and capacitor, then settles lower under load. Choose capacitor size to meet your ripple target; 2200–4700 µF is a common starting point. Accessory Recommendation Bridge Rectifier ≥4 A / ≥50 V (e.g., GBU4xx) Smoothing Capacitor 2200–4700 µF, ≥25 V (choose to suit ripple) Linear Regulator 7812 (with heatsink) or LDO Fuse (Primary) 250 V, time‑lag, sized for inrush (e.g., 250–500 mA) Terminal Block 5.08 mm, 2‑pin ⚠️ Primary must be fused and isolated. Observe local electrical codes. 🧊 Add a heatsink if you regulate to 12 V with a 7812 and draw significant current. 🧷 Use strain relief and secure mounting to reduce vibration and noise. ⚙️ Typical Applications Linear DC power supplies for DIY and lab benches Audio preamps, op‑amp circuits, and analog projects Relays, lamps, and low‑voltage AC experiments 📦 Package • 1× 12 V 2 A EI transformer (single 0–12 V secondary) 🔒 Safety Notes Mains voltage is hazardous. Installation should be performed by a qualified person. Always disconnect power before wiring. Use appropriate fusing on the primary and consider a MOV/NTC for inrush management. 🔌 نظرة عامة محول EI بيخفّض الجهد من 220 فولت AC لخرج 12 فولت AC بتيار لحد 2 أمبير . الخرج هنا لفة واحدة (0–12 فولت) — مش 12‑0‑12. مناسب جدًا لعمل مزوّد طاقة خطي بسيط أو تشغيل دوائر بتحتاج AC منخفض. 📐 المواصفات Spec Value Primary (Input) 220 VAC ±10%, 50/60 Hz Secondary (Output) 12 VAC (RMS), single winding (0–12 V) — NOT center‑tapped Rated current 2 A (continuous, ambient ≤ 40 °C) Apparent power ~24 VA Core / type EI laminated steel, chassis mount Regulation Typical of EI cores; varies with load and batch Insulation Mains‑rated; use proper fusing & strain relief Leads Primary: 2 leads • Secondary: 2 leads (0 & 12 V) قدرة اسمية حوالي 24 VA. قراءة الفولت بـ تكون أعلى شوية بدون حمل، وبتنخفض مع الحمل — ده طبيعي في محولات EI. 🧰 التوصيل والاستخدام لو عايز DC ، وصّل الخرج 12 VAC على بريدچ تقويم كامل وكباستور تنعيم. عمومًا هتلاقي الفولت بعد التقويم والكباستور حوالي 15–16 فولت DC بدون حمل ، وبيقل مع الحمل. كبدايات: 2200–4700 µF/25 V بتبقى مناسبة، ومع تيار عالي زوّد السعة. ⚠️ طرف الدخول لازم فيوز وحماية كويسة، والتوصيل يكون آمن على التيار العمومي. 🧊 لو هتنظم لـ 12 V بـ 7812 ومعاك حمل تقيل، ركب مُشتِّت حرارة. 🛠️ ثبّت المحول كويس عشان الاهتزاز والزنّة. ⚙️ تطبيقات مزودات طاقة خطية للمشاريع والدِشّة دوائر أنالوج وأوديو تجارب AC منخفض الجهد 📦 المحتويات • 1× محول 12 V 2 A (خرج واحد 0–12 V)