Is there a pin-compatible replacement for LMSZ5248BT1G?

Yes, parts like MMSZ5250BT1G are available in the same SOD-123 package, making them pin-compatible. However, their electrical parameters, specifically the Zener voltage (20V vs 18V), are different and must be verified.

What risks should I check before replacing LMSZ5248BT1G?

The main risk is the higher Zener voltage (20V vs 18V) of available alternatives. You must confirm that your circuit's voltage regulation and downstream components can tolerate this higher voltage.

LMSZ5248BT1G Alternatives, Datasheet & Cross Reference | LRC

LMSZ5248BT1G is an 18V, 500mW Zener diode in a SOD-123 package. Alternatives exist but require careful review of the Zener voltage, as direct drop-in replacements are not readily available.

AI replacement insight

Electrical riskmedium

Zener voltage is higher (20V vs 18V) on all viable alternatives, requiring circuit validation.

Package risklow

Alternatives share the same SOD-123 package, ensuring mechanical compatibility.

Can it be replaced directly?

No direct, drop-in replacement with an 18V Zener voltage was found. Alternatives have a 20V rating and require engineering review.

Best replacement path

Use a parametric alternative like MMSZ5250BT1G if the circuit can tolerate a 20V Zener voltage.

Main risk

The primary risk is the Zener voltage mismatch; most alternatives are rated for 20V, not 18V.

Recommended alternatives

The 20V version from the same manufacturer and series, in an identical SOD-123 package with the same power rating.

View details

Alternative comparison matrix

Feature / factor	LMSZ5248BT1G	LMSZ5250BT1G	MMSZ5250BT1G	Compatibility / risk
Package	SOD-123	SOD-123	SOD-123	SOD-123 — Package matches, ensuring form-fit compatibility.; MMSZ5250BT1G: Package matches, ensuring form-fit compatibility.
Diode Type	Zener	Zener	Zener	Zener — Both are Zener diodes from the same manufacturer series.; MMSZ5250BT1G: Both are Zener diodes, functional role is the same.
Voltage	18V	20V	20V	20V — Higher Zener voltage requires circuit validation.; MMSZ5250BT1G: Higher Zener voltage requires circuit validation.
Power	500mW	500mW	500mW	500mW — Power dissipation rating is identical.; MMSZ5250BT1G: Power dissipation rating is identical.
Manufacturer	LRC	LRC	-	LRC — Same manufacturer as the target part.
Lifecycle	-	-	Active	Active — Candidate is active, suitable for new designs.

Application & sourcing insights

Questions & answers

MMSZ5250BT1G by onsemi and LMSZ5250BT1G by LRC are strong candidates if your application can accept a 20V Zener voltage instead of 18V. Both share the same package and power rating.