or 20 seconds. NOTE 3: Temperature coefficient ( vz ). Test conditions for temperature coefficient are as follows: a. I ZT = 20 mA, T 1 = 25 oC, o T 2 = 125 C (1N5221AUR-1 & BUR-1 thru 1N5242AUR-1 & BUR-1) b. I ZT = Rated I ZT , T 1 = 25 oC, T 2 = 125 oC (1N5243AUR-1 & BUR-1 thru 1N5281AUR-1 & BUR-1) Device to be temperature stabilized with current applied prior to reading breakdown voltage at the specified ambient temperature. T4-LDS-0232-1, Rev. 1 (111957) (c)2011 Microsemi Corporation Page 4 of 6 1N5221BUR-1 thru 1N5281BUR-1 Temperature Coefficient mV/oC Temperature Coefifcient %/oC Pd, Rated Power Dissipation (mW) GRAPHS TEC TA T EC End Cap Temperature (C), or TA Ambient Temperature on FR4 PC Board Nominal Zener Voltage (Volts) FIGURE 2 ZENER VOLTAGE TEMPERATURE COEFFICIENT vs. ZENER VOLTAGE Typical Capacitance In Picofarads (pF) FIGURE 1 POWER DERATING CURVE Zener Voltage V Z FIGURE 3 CAPACITANCE vs. ZENER VOLTAGE (TYPICAL) T4-LDS-0232-1, Rev. 1 (111957) (c)2011 Microsemi Corporation Page 5

device to stabilize for 20 seconds. Temperature coefficient (vz). Test conditions for temperature coefficient are as follows: a. IZT = 7.5 mA, T1 = 25oC, T2 = 125oC (1N5221AUR-1 & BUR-1 thru 1N5242AUR-1 & BUR-1) IZT = Rated IZT, T1 = 25oC, b. T2 = 125oC (1N5243AUR-1 & BUR-1 thru 1N5281AUR-1 & BUR-1) Device to be temperature stabilized with current applied prior to reading breakdown voltage at the specified ambient temperature. These devices may be ordered as either 1N5221UR-1 thru 1N5281BUR-1 or as MLL5221-1 thru MLL5281B-1 part numbers. RATED POWER -mW o TEMPERATURE COEFFICIENT mV/ C TEMPERATURE COEFFICIENT %/ C GRAPHS TEC TA Voltage Temperature o Coefficient %/ C mV Change /C o TEC End Cap Temperature (C), or TA Ambient Temperature on FR4 PC BOARD NOMINAL ZENER VOLTAGE (VOLTS) FIGURE 2 ZENER VOLTAGE TEMPERATURE COEFFICIENT vs. ZENER VOLTAGE FIGURE 1 POWER DERATING CURVE PACKAGE DIMENSIONS DIM A B C INCHES MIN MAX 0.063 0.067 0.130 0.146 0.016 0.022 INCHES .200 .055 .080 1N5221UR thru 1N5281BUR

device to stabilize for 20 seconds. Temperature coefficient (vz). Test conditions for temperature coefficient are as follows: IZT = 7.5 mA, T1 = 25oC, a. T2 = 125oC (1N5221AUR-1 & BUR-1 thru 1N5242AUR-1 & BUR-1) b. IZT = Rated IZT, T1 = 25oC, T2 = 125oC (1N5243AUR-1 & BUR-1 thru 1N5281AUR-1 & BUR-1) Device to be temperature stabilized with current applied prior to reading breakdown voltage at the specified ambient temperature. These devices may be ordered as either 1N5221UR-1 thru 1N5281BUR-1 or as MLL5221-1 thru MLL5281B-1 part numbers. RATED POWER -mW o TEMPERATURE COEFFICIENT mV/ C TEMPERATURE COEFFICIENT %/ C GRAPHS TEC TA Voltage Temperature o Coefficient %/ C mV Change /C o TEC End Cap Temperature (C), or TA Ambient Temperature on FR4 PC BOARD NOMINAL ZENER VOLTAGE (VOLTS) FIGURE 2 ZENER VOLTAGE TEMPERATURE COEFFICIENT vs. ZENER VOLTAGE FIGURE 1 POWER DERATING CURVE PACKAGE DIMENSIONS DIM A B C INCHES MIN MAX 0.063 0.067 0.130 0.146 0.016 0.022 INCHES .200 .055 .080 1N5221UR thru 1N5281BUR

stabilize for 20 seconds. NOTE 3: Temperature coefficient (vz). Test conditions for temperature coefficient are as follows: a. IZT = 20 mA, T1 = 25 oC, T2 = 125 oC (1N5221AUR-1 & BUR-1 thru 1N5242AUR-1 & BUR-1) b. IZT = Rated IZT, T1 = 25 oC, T2 = 125 oC (1N5243AUR-1 & BUR-1 thru 1N5281AUR-1 & BUR-1) Device to be temperature stabilized with current applied prior to reading breakdown voltage at the specified ambient temperature. T4-LDS-0232-1, Rev. 1 (111957) (c)2011 Microsemi Corporation Page 4 of 6 1N5221BUR-1 thru 1N5281BUR-1 Pd, Rated Power Dissipation (mW) o o Temperature Coefifcient %/ C Temperature Coefficient mV/ C GRAPHS TEC TA TEC End Cap Temperature (C), or TA Ambient Temperature on FR4 PC Board Nominal Zener Voltage (Volts) FIGURE 2 ZENER VOLTAGE TEMPERATURE COEFFICIENT vs. ZENER VOLTAGE Typical Capacitance In Picofarads (pF) FIGURE 1 POWER DERATING CURVE Zener Voltage VZ FIGURE 3 CAPACITANCE vs. ZENER VOLTAGE (TYPICAL) T4-LDS-0232-1, Rev. 1 (111957) (c)2011 Microsemi Corporation Page