T4-LDS-0245, Rev. 2 (5/31/13)

©2013 Microsemi Corporation

Page 3 of 6

1N4614UR-1 – 1N4627UR-1e3,

1N4099UR-1 – 1N4135UR-1e3

SYMBOLS & DEFINITIONS

Symbol

Definition

α

VZ

Temperature Coefficient of Regulator Voltage: The change in regulator voltage divided by the change in temperature

that caused it expressed in %/C or mV/°C.

IR

Reverse Current: The maximum reverse (leakage) current that will flow at the specified voltage and temperature.

IZ, IZT, IZK

Regulator Current: The dc regulator current (IZ), at a specified test point (IZT), near breakdown knee (IZK).

IZM

Maximum Regulator (Zener) Current: The maximum rated dc current for the specified power rating.

ND

Noise Density: The noise generated over a specified frequency bandwidth u

sually specified in terms of mV/ √Hz.

VR

Reverse Voltage: The reverse voltage dc value, no alternating component.

VZ

Zener Voltage: The Zener voltage the device will exhibit at a specified current (IZ) in its breakdown region.

ZZT or ZZK

Dynamic Impedance: The small signal impedance of the diode when biased to operate in its breakdown region at a

specified rms current modulation (typically 10% of IZT or IZK) and superimposed on IZT or IZK respectively.