This document describes the features and characteristics of CDI's 1N5283UR-1 through 1N5314UR-1 series current regulator diodes. These diodes are available in JAN, JANTX, JANTXV, and JANS per MIL-PRF-19500/463. They are leadless and designed for surface mount applications. The document provides design data including case type, thermal resistance, thermal impedance, polarity, and mounting surface selection. The electrical characteristics at 25°C are also provided.
The CDI current regulator diodes (1N5283UR‑1 through 1N5314UR‑1 and CDLL5283 through CDLL5314) are lead‑less, surface‑mount devices designed for precise current regulation in a wide temperature range. They feature a double‑plug construction and are supplied in a hermetically sealed DO‑213AB (MELF) package.
Key specifications include an operating temperature from –65 °C to +175 °C, a maximum power dissipation of 500 mW at +75 °C, and a peak operating voltage of 100 V. Electrical characteristics such as dynamic knee voltage, regulator current, and impedance are detailed in extensive tables, along with temperature coefficient curves for pinch‑off current.
| Operating Temperature | -65°C to +175°C |
|---|---|
| Storage Temperature | -65°C to +175°C |
| DC Power Dissipation | 500 mW @ +75°C (TE = +125°C) |
| Peak Operating Voltage | 100 V |
| Package Type | DO‑213AB hermetically sealed MELF (LL41) |
| Lead Finish | Tin / Lead |
| Thermal Resistance | 50 °C/W maximum |
| Polarity | Cathode end negative |
The diodes operate from –65 °C up to +175 °C.
The maximum DC power dissipation is 500 mW at +75 °C (with a thermal edge of +125 °C).
They are supplied in a DO‑213AB hermetically sealed MELF (LL41) surface‑mount package.
The diode must be connected with the banded (cathode) end negative.