Alternatives to onsemi MMSZ5245B
onsemi MMSZ5245B and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 MMSZ5245Bonsemi |  MMSZ5245BT1Gonsemi |  MMSZ5245B-7-FDiodes Incorporated | +3more | |
|---|---|---|---|---|
| FFF Compatibility | Identical SOD-123 surface mount footprint with matching cathode (Pin 1) and anode (Pin 2) assignments.Shares the exact package dimensions and lead shape of the original part.Matches all electrical parameters: 15V nominal Zener voltage, 5% tolerance, 500mW power dissipation, and 16 Ohm maximum impedance. | Perfect fit for the standard SOD-123 land pattern with identical terminal polarization.Standard SOD-123 package dimensions (approx. 2.69mm x 1.6mm) matching the original form factor.Electrical characteristics are fully equivalent, including the 16 Ohm maximum impedance and 100 nA reverse leakage. | ||
 AI Summary | MMSZ5245B by onsemi: Zener Diode 15 V 500 mW ±5% Surface Mount SOD-123. | This is the direct modern active equivalent from the original manufacturer (onsemi) under their lead-free / RoHS-compliant part numbering scheme. It offers identical physical, mechanical, and electrical performance to the obsolete base part number.
| Diodes Inc.'s version is a highly reliable, widely-stocked second source that serves as a direct drop-in replacement in standard SOD-123 layouts. It completely matches all target electrical and physical specs.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | In stock | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | Zener Diode 15 V 500 mW ±5% Surface Mount SOD-123 | Zener Diode 15 V 500 mW ±5% Surface Mount SOD-123 | Zener Diode 15 V 500 mW ±5% Surface Mount SOD-123 | |
| Manufacturer | onsemi | onsemi | Diodes Incorporated | |
| Type | Diodes | Diodes | Diodes | |
| Datasheet | Open | Open | Open | |
| Lead Time | 7 weeks | 44 weeks | 40 weeks | |
| Country of Origin | CN | CN, MY, JP | CN, JP, GB, DE, TW | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8541.10.0050 | 8541.10.0050 | 8541.10.0050 | |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | |
| Tolerance | ±5% | ±5% | ±5% | |
| Power - Max | 500 mW | 500 mW | 500 mW | |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | |
| Package / Case | SOD-123 | SOD-123 | SOD-123 | |
| Impedance (Max) (Zzt) | 16 Ohms | 16 Ohms | 16 Ohms |
Unlock all 5 alternatives
- Find & compare verified second sources
- Spot risk early with real-time part monitoring
- Stay compliant and production-ready
Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 MMBZ5242Bonsemi | Non-stock | Obsolete | 5Alternatives availableSee Alternatives |
 MMBZ5242BLT1onsemi | Discontinued | Obsolete | 6Alternatives availableSee Alternatives |
 DL5245BDiodes Incorporated | Non-stock | Obsolete | 5Alternatives availableSee Alternatives |
You searched one part. Parter watches your whole BOM.
All your BOM, at once
Parter maps every line to live stock, lead time, lifecycle and compliance data across the entire market — not part by part.
Hear about problems before they hit production
Allocation, EOL and last-time-buy notices surface the moment they appear, not when your buyer's PO bounces.
Qualified replacements in minutes, not days
Every at-risk line gets form-fit-function matches like the ones above — deltas flagged, evidence attached. Review, push to your BOM, and Parter starts watching the new part too.
Frequently asked questions
Yes. The onsemi MMSZ5245B is marked obsolete, so the manufacturer has discontinued it and any remaining supply is limited to distributor stock. The qualified second sources on this page are active parts you can design in today.
The closest qualified second sources for the onsemi MMSZ5245B are the MMSZ5245BT1G (onsemi) and the MMSZ5245B-7-F (Diodes Incorporated), out of 5 matched alternatives in total. Each is compared against the original on fit, form and function in the table above.
Yes. The leading alternatives to the MMSZ5245B are fit-, form- and function-compatible — the same package and pinout with matching key electrical specifications — so they drop in without PCB changes. Always confirm the parameters critical to your design against the alternative's datasheet before committing.
The MMSZ5245B (onsemi) is a part in the Diodes category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
Schedule a demo
See Parter in action
Discover how Parter can help your hardware team:
- Streamline your hardware operations with AI
- Detect and prevent lifecycle disruptions
- Accelerate product development
- Stay compliant and production-ready