EZA-EG1A50AC Panasonic Diode (Diodes Chip) In Stock
The EZA-EG1A50AC is a bidirectional ESD suppressor TVS diode from Panasonic in a 2-pin SMD chip package, rated at 500V standoff for protecting sensitive electronics from electrostatic discharge events. It provides fast transient suppression in a compact surface-mount form factor suitable for high-density PCB layouts. Available in tape-and-reel packaging for automated SMT assembly with RoHS-compliant construction.
- Manufacturer
- Panasonic
- Package
- Diodes Chip
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- EZA-EG1A50AC Datasheet PDF
- Category
- Diode
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 500V standoff voltage rating handles high-voltage ESD events on industrial and automotive I/O lines without clamping during normal operation
- Bidirectional (bi-dir) TVS configuration protects AC signal lines and dual-polarity data buses without requiring two separate diodes
- 2-pin SMD chip package enables ultra-compact PCB footprint for per-pin ESD protection on high-density connector interfaces
- Tape-and-reel (T/R) packaging supports automated pick-and-place assembly, reducing placement cost in high-volume production
- RoHS-compliant construction qualifies the device for CE-marked and environmentally regulated end products in global markets
Applications
The EZA-EG1A50AC is designed to protect sensitive input/output lines on industrial sensors, fieldbus interfaces, and communication ports exposed to high-voltage ESD events up to 500V. Its bidirectional clamping suits RS-485, CAN bus, and analog 4-20mA signal lines where transients of either polarity must be suppressed. The compact 2-pin SMD chip form factor allows placement directly at connector pins on space-constrained PCBs in smart meters, building automation controllers, and motor drive interface boards.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What standoff voltage does the EZA-EG1A50AC provide, and which signal line voltages is it appropriate for?
The EZA-EG1A50AC has a 500V standoff voltage, meaning it remains non-conducting during normal operation on signal lines up to 500V peak and only clamps when an ESD pulse exceeds that threshold. This rating is suited for industrial fieldbus lines, high-voltage analog outputs, and AC signal rails operating below 500V RMS where IEC 61000-4-2 level 4 ESD events (up to 8kV contact discharge) must be suppressed without affecting normal signal integrity.
Why choose a bidirectional TVS like the EZA-EG1A50AC instead of two unidirectional diodes for AC or differential signal protection?
A single bidirectional TVS diode like the EZA-EG1A50AC clamps transients of both polarities with one 2-pin SMD component, compared to two unidirectional diodes that would require 4 pins and twice the PCB footprint. On differential signal pairs such as RS-485 or CAN bus lines where common-mode transients alternate polarity, the bidirectional configuration ensures symmetric protection within a matched propagation delay. This reduces BOM complexity by at least 1 component per protected line and eliminates asymmetric clamping behavior that could corrupt differential signals.
How does the 2-pin SMD chip package of the EZA-EG1A50AC benefit per-pin ESD protection placement on high-density connectors?
The 2-pin SMD chip package of the EZA-EG1A50AC has a very small PCB footprint, typically under 1mm x 0.5mm for a 0402 or equivalent chip size, allowing individual ESD suppressors to be placed directly at each signal pin of a multi-pin connector without consuming significant board area. Placing protection within 5mm of connector pins minimizes the unprotected stub length, which reduces the effective ESD energy reaching the protected IC by limiting parasitic inductance in the discharge path to under 1nH.
Is the EZA-EG1A50AC compatible with tape-and-reel automated SMT assembly, and what reel format does it ship in?
Yes, the EZA-EG1A50AC ships in tape-and-reel (T/R) format compatible with standard 8mm carrier tape used in automated SMT pick-and-place machines. This packaging allows high-speed placement at rates exceeding 10,000 components per hour on modern SMT lines, and the consistent component orientation in the tape carrier ensures reliable polarity alignment for the bidirectional TVS during assembly. Tape-and-reel availability also supports JIT production scheduling with reel quantities typically ranging from 3,000 to 10,000 pieces per reel.
For IEC 61000-4-2 ESD compliance testing, how does the EZA-EG1A50AC's 500V rating relate to the standard's test levels?
IEC 61000-4-2 defines contact discharge test levels from 2kV (Level 1) to 8kV (Level 4) and air discharge up to 15kV (Level 4). The EZA-EG1A50AC's 500V standoff allows it to remain inactive during normal operation while its TVS clamping mechanism responds within 1ps to nanosecond-range ESD pulses, limiting the voltage presented to downstream ICs during 8kV contact discharge events. For industrial equipment targeting IEC 61000-4-2 Level 4 compliance on exposed I/O ports, this device provides the first line of protection before the signal reaches internal signal-conditioning circuitry operating at 3.3V or 5V.
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