5.0SMDJ30CA

5.0SMDJ30CA is a surface‑mount transient voltage suppressor (TVS) diode in the SMDJ family. It protects electronics from voltage surges and ESD by clamping spikes to safe levels on a supply or data line.
What the name implies (typical, but verify with the supplier’s datasheet):
- 5.0: nominal stand‑off (working) voltage around 5 V.
- 30: likely the clamping voltage rating (around 30 V under surge).
- CA: usually indicates bidirectional operation (no polarity), though some makers differ—check the exact datasheet.
Key points:
- Fast response, handles high peak pulse power.
- Used across a supply rail or between a line and ground.
- Choose based on Vwm, Vbr, Vclamp, Ipp, capacitance, package, and whether you need uni- or bi-directional protection.
Typical applications: USB/5 V rails, data lines, and other low‑voltage protection needs.
Note: Always consult the specific vendor’s datasheet for exact electrical ratings and pinout, as suffixes and numbers can vary by manufacturer.

5.0SMDJ30CA is a 30V bidirectional TVS diode in the SMDJ package. Equivalents from other brands are 30V bidirectional TVS diodes in the same package family, for example Vishay SMBJ30CA and ON Semiconductor SMBJ30CA. Always verify VRWM, VBR, polarity, and packaging when cross-referencing.

Here are the typical features of a 5.0SMDJ30CA TVS diode (SMDJ package):
- High-power transient voltage suppressor (TVS) diode for surge protection
- Peak pulse power around 1.5 kW (10/1000 μs waveform)
- Stand-off voltage Vwm ≈ 5.0 V; breakdown voltage Vbr ≈ 30 V (values vary by tolerances; check datasheet)
- CA suffix usually indicates bidirectional variant (unidirectional version available in other suffixes)
- Low clamping voltage and low dynamic resistance for effective protection
- Very fast response time (ns to sub-ns range)
- Low leakage in the off state
- Wide operating temperature range (typically -55°C to +125°C)
- Lead-free, RoHS compliant; suitable for reflow soldering
- Package: surface-mount DO-214 (SMDJ) for easy PCB integration
- Applications: protect power rails and high-speed/ data lines (USB, data buses, automotive, industrial)
Note: exact electrical specs (Vbr, Vclamp, leakage, etc.) vary by lot; always refer to the manufacturer datasheet for your lot’s tolerances.

- Pin count: 2 pins (two-terminal device: anode and cathode).
- Function: Transient Voltage Suppressor (TVS) diode used to clamp voltage transients/ESD and protect downstream circuitry (typically with a ~30 V working/standoff voltage for the 30CA variant).

- Manufacturer: Littelfuse.
- What kind of company: A global electronics protection and power-management company that designs and manufactures fuses, TVS diodes, and other circuit-protection components.

5.0SMDJ30CA is a 30 V class TVS diode (SMD package) used to clamp transient voltages and ESD. Typical application areas:
- Automotive power rails (12–24 V) and protection of harness spikes
- DC power supplies and on-board protection for consumer/industrial electronics
- Data/communication interfaces and lines (CAN, RS-485/RS-232, USB, Ethernet, HDMI)
- Telecom/networking equipment and other surge-prone boards
- General surge and transient protection on 30 V-class signal/power lines
Aim: protect sensitive components from overvoltage spikes and ESD events.

It’s the SMDJ package — a SMB-sized surface-mount TVS diode in the DO-214AB family.