ITEM SPECIFICS Brand: Unbranded / ZBC marking MPN: ECG-5121A Model: ECG-5121A Alternate Marking: ZBC-7.5 Type: Zener diode Voltage Rating: 7.5 V Power Rating: 5 W Tolerance: 5% Power Type: AC/DC Number of Pins: 2 Package/Case: Axial-lead Mounting: Through-hole Condition: Untested; see photographs Quantity: 10
DESCRIPTION Lot of 10 vintage ECG-5121A / ZBC-7.5 axial-lead zener diodes rated 7.5 V, 5 W, and 5% tolerance. Suitable for vintage, industrial, and electronic repair applications involving voltage regulation, reference, or overvoltage protection. Markings and condition are shown in the photographs.
DISCLAIMER Untested surplus components. Voltage, leakage, breakdown current, tolerance, and thermal performance were not independently verified. Components may show storage wear, oxidation, or handling marks. Sold as pictured.
LEGAL DISCLAIMER American Industrial Parts Group is an independent reseller and is not an authorized distributor or representative of ECG, ZBC, or any related manufacturer. Trademarks are used solely for identification.
COMPATIBILITY & CROSS-REFERENCE ECG-5121A is the ECG number for a 7.5V, 5W Zener diode. NTE's equivalent is the NTE5121A (7.5V, 5W), whose replacement list includes ZBC7.5, ZBC7.5A and ZBC7.5B, matching the ZBC-7.5 marking. Confirm voltage, tolerance and power rating against the original circuit before substituting.
Q&A Q: What are the ratings of the ECG-5121A? A: 7.5V Zener voltage and 5W power rating, axial lead. Q: What does the ZBC-7.5 marking mean? A: It is a ZBC-series 7.5V Zener designation listed under the NTE5121A replacements. Q: How many are included? A: Ten.
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