1. Device Description & Scope:

️· Product: Zener diodes
️· Part Numbers: Includes both "1N4099UR-1" through "1N4135UR-1" *and* "CDLL4099" through "CDLL4135". This means the document covers two naming conventions for the same family of diodes.
️· Manufacturer: CDI Diodes
️· Package Types: DO-213AA (likely Axial), MELF, SOD-80, LL34
️· Polarity: Band indicates the cathode (positive) end.

2. Electrical Characteristics (From the Table - Key Values):

Part Number	Nominal Zener Voltage (V)	Zener Impedance (Ohms)	Operating Current IZT (mA)
CDLL4099	6.2	800	5.1
CDLL4100	6.8	700	5.6
CDLL4101	7.5	700	6.1
CDLL4102	8.2	100	4.6
CDLL4103	8.7	1000	4.4
CDLL4104	9.1	1200	4.2
CDLL4105	10.0	1500	3.8
CDLL4106	12.0	200	3.3
CDLL4107	15.0	250	2.9
CDLL4108	17.0	300	2.7
CDLL4109	18.0	400	2.5
CDLL4110	20.0	500	2.3
CDLL4111	22.0	100	2.1
CDLL4112	24.0	150	2.0
CDLL4113	25.0	200	1.9
CDLL4114	27.0	300	1.7
CDLL4115	28.0	350	1.6
CDLL4116	30.0	400	1.5
CDLL4117	33.0	500	1.4
CDLL4118	36.0	600	1.3
CDLL4119	39.0	700	1.2
CDLL4120	43.0	800	1.1
CDLL4121	47.0	900	1.0
CDLL4122	51.0	1000	0.9
CDLL4123	56.0	1100	0.8
CDLL4124	100	1200	0.7
CDLL4125	100	1300	0.6

Important Notes about the Table:

️· Zener Voltage: The "Nominal Zener Voltage" is the voltage at which the diode is designed to operate.
️· Zener Impedance: This is the impedance of the diode at the Zener voltage. It's a measure of how much the diode resists current flow.
️· Operating Current (IZT): The current flowing through the diode at the Zener voltage.
️· Tolerance: All Zener voltages are subject to a +/- 5% tolerance.

3. Physical Characteristics & Design Data:

️· Lead Finish: Tin/Lead
️· Thermal Resistance (RθJA): 100 °C/W maximum (important for heat dissipation)
️· Thermal Impedance (ZθJA): 35 °C/W maximum
️· Coefficient of Thermal Expansion (COE): +6 PPM/°C - A critical value for selecting mounting surfaces to prevent stress.

4. Figures:

️· Figure 2 (Power Derating Curve): Shows how the maximum power dissipation of the diode decreases as the case temperature increases.
️· Figure 3 (Zener Impedance vs. Operating Current): Illustrates the relationship between Zener impedance and current.
️· Figure 1: Shows the physical dimensions of the device in both inches and millimeters.



In essence, this document is a technical datasheet for a series of Zener diodes. It provides vital information for engineers designing circuits that require a stable reference voltage.