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Best Alternatives to SD18C-MS

Package: SOD-323MSKSEMITVS - DiodesWorking Voltage (VRWM): 18 VBreakdown Voltage (VB): 20 V (min)Peak Pulse Power: 350 WClamping Voltage (VC): 45 V (max)Configuration: Bidirectional

Finding a replacement for the SD18C-MS TVS diode requires matching its 18V working voltage, 350W power rating, and SOD-323 package. While some parts share the package, key electrical parameters often differ.

AI replacement insight

Electrical riskhigh

Mismatched working voltage on all candidates poses a high risk to circuit protection.

Package risklow

All candidates use the same SOD-323 package, ensuring physical compatibility.

Firmware risklow

Not applicable for a simple passive component like a TVS diode.

Can it be replaced directly?

No, a direct, drop-in replacement for the SD18C-MS was not identified. All candidates have a different working voltage.

Best replacement path

Search for TVS diodes with an 18V working voltage, >=350W power rating, and a SOD-323 package. No direct match was found in this batch.

Main risk

The primary risk is using a part with a higher working voltage (e.g., 24V), which will not adequately protect a circuit designed for an 18V threshold.

Recommended alternatives

3
PESD1IVN27-A-ES package
PESD1IVN27-A-ES

ElecSuper

Needs validationhigh risk

Matches package and power rating, but has a higher working voltage (24V) and lower capacitance.

View details

Alternative comparison matrix

Feature / factorSD18C-MSPESD1IVN27-A-ESGBLC24CPESD24VL1BA-NCompatibility / risk
PackageSOD-323SOD-323SOD-323SOD-323SOD-323 — Form factor matches.; GBLC24C: Form factor matches.; PESD24VL1BA-N: Form factor matches.
Polarity Or TypeBidirectionalBidirectionalBidirectionalBidirectionalBidirectional — Polarity matches.; GBLC24C: Polarity matches.; PESD24VL1BA-N: Polarity matches.
Voltage V18V24V24V24V24V — Higher working voltage, will not protect 18V rail.; GBLC24C: Higher working voltage, will not protect 18V rail.; PESD24VL1BA-N: Higher working voltage, will not protect 18V rail.
Power W350W350W300W300W350W / 300W — Peak power rating matches.; GBLC24C: Lower peak power rating.; PESD24VL1BA-N: Lower peak power rating.
Capacitance<57pF18pF0.8pF-18pF / 0.8pF — Lower capacitance is an improvement for signal integrity.; GBLC24C: Ultra-low capacitance is a significant improvement.
Clamping Voltage45V--50V50V — Higher clamping voltage offers less protection.

Application & sourcing insights

Questions & answers

No direct drop-in replacements were found. Alternatives like PESD1IVN27-A-ES exist but have a different working voltage (24V) and require careful design review before use.