The ZMM5248B-13 from Vishay is a strong parametric match for the ZMM18V, but it is obsolete. Finding an active, in-production alternative with an 18V rating, 500mW power, and LL-34/MiniMELF package is recommended.
Best Alternatives to ZMM18V
Finding a replacement for the ZMM18V Zener diode involves matching its 18V rating, 500mW power, and LL-34 package. Alternatives must be carefully checked for voltage tolerance and dynamic impedance.
AI replacement insight
Electrical risklow
Low, if a part with matching Vz, Ptot, and Zzt is found.
Package risklow
Low, the LL-34/MiniMELF package is common.
Sourcing riskhigh
High, requires finding an active part and qualifying a new manufacturer.
Can it be replaced directly?
No direct, active, in-production replacement was identified in this review. The closest match, ZMM5248B-13, is obsolete.
Best replacement path
Search for an active 18V, 500mW Zener diode in an LL-34 or DO-213AA package from a major manufacturer.
Main risk
The primary risk is sourcing, as the closest parametric match is obsolete. Any alternative requires careful electrical validation.
Recommended alternatives
Alternatives are being enriched. Analyze this part in PartGenie for the latest matches.
Alternative comparison matrix
| Feature / factor | ZMM18V | ZMM5248B-13 | Alt 2 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Voltage | 18 V | 18 V | 18 V — Nominal Zener Voltage (Vz) matches. | ||
| Power | 500 mW | 500 mW | 500 mW — Power dissipation matches. | ||
| Package | LL-34 (MiniMELF) | DO-213AA (MiniMELF) | DO-213AA (MiniMELF) — Package is form-factor compatible. | ||
| Resistance | 50 Ohm | 21 Ohms | 21 Ohms — Lower dynamic impedance is an improvement. | ||
| Lifecycle | - | Obsolete | Obsolete — Candidate is obsolete, target is active. |