Part Number: HFBR1521ZAVAROHS (Fiber optic transmitter)Part Number: HFBR1522ZAVAROHS (Fiber optic transmitter)Part Number: HFBR1531ZAVAROHS (Fiber optic transmitter)Part Number: HFBR1532ZAVAROHS (Fiber optic transmitter)Part Number: HFBR1533ZAVA (Fiber optic transmitter)Part Number: SFH756VINFROHS (Fiber optic transmitter)Part Number: SFH757VINFROHS (Fiber optic transmitter)