BD437 Bipolar (BJT) Single Transistor, NPN, 45 V, 4 A, 36 W, TO-126, Through Hole BD437Bipolar (BJT) Single Transistor, NPN, 45 V, 4 A, 36 W, TO-126, Through Hole SKU: 10$2.20PriceQuantity*Add to CartBuy NowNo Reviews YetShare your thoughts. Be the first to leave a review.Leave a Review