The 1N5518BUR-1 through 1N5546BUR-1 series of 0.5 watt glass surface mount Zener voltage regulators provides a selection from 3.3 to 33 volts in standard 5% tolerances as well as tighter tolerances identified by different suffix letters on the part number. These have an internal-metallurgical-bond option as identified by the “–1” suffix. This internally bonded Zener package construction is also in JAN, JANTX, and JANTXV military qualifications. Microsemi also offers numerous other Zener products to meet higher and lower power applications.
The Microsemi Low Voltage Surface Mount 500 mW Avalanche Diodes series (IN5518BUR‑1 to 1N5546BUR‑1, also offered as MLL 5518B‑1 to MLL 5546B‑1) provides Zener voltage regulation from 3.3 V to 33 V in a hermetically sealed glass DO‑213AA package. The devices feature an internal metallurgical bond (identified by the “‑1” suffix) and are available in MIL‑PRF‑19500/4 qualified versions (JAN, JANTX, JANTXV) for military applications.
Key specifications include standard voltage tolerance of ±5 % (B suffix) with tighter ±2 % (C suffix) or ±1 % (D suffix) options, a maximum steady‑state power dissipation of 0.5 W, operating temperature range from –65 °C to +175 °C, thermal resistance of 100 °C/W (junction‑to‑end‑cap) or 250 °C/W (junction‑to‑ambient on FR4), and a forward voltage of 1.1 V at 200 mA. Recommended soldering is 260 °C for up to 10 seconds.
| Nominal Zener Voltage Range | 3.3 V to 33 V |
|---|---|
| Voltage Tolerance (B suffix) | ±5 % |
| Maximum Steady‑State Power | 0.5 W |
| Operating Temperature Range | -65 °C to +175 °C |
| Thermal Resistance (junction‑to‑end‑cap) | 100 °C/W |
| Forward Voltage @200 mA | 1.1 V |
| Recommended Solder Temperature | 260 °C for 10 s max |
| Package Type | DO‑213AA (SOD80 or MLL34) hermetically sealed glass |
Solder at 260 °C for a maximum of 10 seconds.
Each diode can dissipate up to 0.5 W continuously.