Is there a pin-compatible replacement for JEB03CX?

Yes, several parts like SPD9103W are available in the same SOD-323 package and are considered pin-compatible. However, no identified part is a perfect electrical match, so you must verify key parameters like power rating and capacitance.

What risks should I check before replacing JEB03CX?

Before replacing JEB03CX, check three main risks: 1) Peak Pulse Power: Ensure the substitute's power rating (Ppp) is sufficient for your application's expected surges. 2) Capacitance: Verify the substitute's higher capacitance won't degrade high-speed signal integrity. 3) Clamping Voltage: Compare the clamping voltage at your system's threat level.

JEB03CX Alternatives, Datasheet & Cross Reference | Leiditech

JEB03CX is a high-performance 3.3V TVS diode in a compact SOD-323 package, offering 400W surge protection with ultra-low 0.6pF capacitance, ideal for protecting high-speed data lines.

AI replacement insight

Electrical riskmedium

Substitutes have lower power ratings or higher capacitance, requiring application-specific analysis.

Package risklow

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

Can it be replaced directly?

No direct drop-in replacement with identical or better specifications was found. SPD9103W is a strong candidate but has minor parametric differences.

Best replacement path

SPD9103W is the closest functional alternative, but requires review for its slightly lower power rating and higher capacitance.

Main risk

The primary risk is using a substitute with a lower peak pulse power rating, which could lead to device failure during a surge event.

Recommended alternatives

A functional alternative in the same package and voltage, but with slightly lower power handling.

View details

Alternative comparison matrix

Feature / factor	JEB03CX	SPD9103W	TPGC03C	WS03DLC-B-ES	Compatibility / risk
Package	SOD-323	SOD-323	SOD-323	SOD-323	SOD-323 — Package matches, enabling physical drop-in.; TPGC03C: Package matches.; WS03DLC-B-ES: Package matches.
Voltage	3.3V	3.3V	3.3V	3.3V	3.3V — Working voltage matches, suitable for 3.3V lines.; TPGC03C: Working voltage matches.; WS03DLC-B-ES: Working voltage matches.
Power	400W	350W	260W	200W	350W / 260W / 200W — Slightly lower peak pulse power handling.; TPGC03C: Significantly lower peak pulse power.; WS03DLC-B-ES: Significantly lower peak pulse power (50% of target).
Capacitance	0.6pF	1.0pF	1.0pF	1.2pF	1.0pF / 1.2pF — Higher capacitance may affect high-speed signal integrity.; TPGC03C: Higher capacitance may affect high-speed signals.; WS03DLC-B-ES: Higher capacitance may affect high-speed signals.

Application & sourcing insights

Questions & answers

The best alternative found is SPD9103W. It matches the 3.3V working voltage and SOD-323 package, but has a slightly lower power rating (350W vs 400W) and higher capacitance (1.0pF vs 0.6pF). Engineering review is recommended.