. Derived from 50Hz ac voltage from ac current of 10% rms of IZT (or IZK) superimposed on DC IZT (or IZK) 2) Temperature Coefficient test conditions: a. IZT = 7.5mA , T1 = 25C, T2 = 125C (1N5221A, B through to 1N5242A, B) b. I = 7.5mA , T = 25C, T = 125C (1N5243A, B through to 1N5281A, B) ZT 1 2 DUT temperature stabilised with constant current for VZ measurement @ T1,T2 Semelab Ltd reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use. Semelab encourages customers to verify that datasheets are current before placing orders. Semelab Ltd. Telephone +44(0)1455 556565. Fax +44(0)1455 552612. E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk DOC 7788 issue 3

with different operating currents. 3. Temperature coefficient ( VZ ). Test conditions for temperature coefficient are as follows: o o a. I ZT = 20 mA, T 1 = 25 C, T 2 = 125 C (1N5221A, B thru 1N5242A, B). b. I ZT = Rated I ZT , T 1 = 25 oC, T 2 = 125 oC (1N5243A, B thru 1N5281A, B). (Device to be temperature stabilized with current applied prior to reading breakdown voltage at the specified ambient temp.) Typical Capacitance in Pico Farads (pF) Pd, Rated Power Dissipation (mW) GRAPHS T L Lead Temperature at 3/8" From Body or T A on FR4 PC Board FIGURE 1 POWER DERATING CURVE T4-LDS-0232, Rev. 1 (111957) Zener Voltage V Z FIGURE 2 CAPACITANCE vs. ZENER VOLTAGE (TYPICAL) (c)2011 Microsemi Corporation Page 4 of 5 1N5221B-1 thru 1N5281B-1 PACKAGE DIMENSIONS Ltr BD BL LD LL LL 1 Inch Min .055 .120 .018 1.000 Dimensions Millimeters Max Min Max .090 1.40 2.29 .200 3.05 5.08 .022 0.46 0.56 1.500 25.40 38.10 .050 1.27 Notes 3 3 4 NOTES: 1. Dimensions are in inch. 2. Millimeters are given for general infor

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

wing the 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 & BUR thru 1N5242AUR & BUR) b. IZT = Rated IZT, T1 = 25oC, T2 = 125oC (1N5243AUR & BUR thru 1N5281AUR & BUR) 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 thru 1N5281BUR or as MLL5221 thru MLL5281B part numbers. o TEMPERATURE COEFFICIENT %/ C TEMPERATURE COEFFICIENT mV/ C RATED POWER DISSIPATION GRAPHS TEC TA mV Change /C o o TEC - End Cap Temperature ( C), or TA Ambient Temperature on FR4 PC BOARD Voltage Temperature o Coefficient %/ C NOMINAL ZENER VOLTAGE (VOLTS) FIGURE 1 POWER DERATING CURVE FIGURE 2 ZENER VOLTAGE TEMPERATURE COEFFICIENT vs. ZENER VOLTAGE 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 A

pedance with different operating currents. 3. Temperature coefficient (VZ). Test conditions for temperature coefficient are as follows: o o a. IZT = 7.5 mA, T1 = 25 C, T2 = 125 C (1N5221A, B thru 1N5242A, B). o o b. IZT = Rated IZT, T1 = 25 C, T2 = 125 C (1N5243A, B thru 1N5281A, B). (Device to be temperature stabilized with current applied prior to reading breakdown voltage at the specified ambient temp.) Copyright 2003 6-18-2003 REV A Microsemi Scottsdale Division 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503 Page 2 1N5221 - 1N5281B (DO-35) Test Current IZT mA WWW . Microsemi .C OM JEDEC Type No. Note 1 Nominal Zener Voltage VZ @ IZT Volts 1N5221 thru 1N5281B DO-35 Silicon 500 mW Zener Diodes SCOTTSDALE DIVISION Pd, Rated Power Dissipation (mW) WWW . Microsemi .C OM GRAPHS TL Lead Temperature at 3/8" From Body or TA on FR4 PC Board FIGURE 1 POWER DERATING CURVE FIGURE 2 CAPACITANCE vs. ZENER VOLTAGE (TYPICAL) PACKAGE DIMENSIONS 1N5221 - 1N5281B (D

31A/B 4.7 5.1 <19 <17 <1900 <1600 1N5232A/B 5.6 <11 <1600 1N5233A/B 6.0 <7 <1600 1N5234A/B 6.2 <7 <1000 1N5235A/B 6.8 <5 <750 1N5236A/B 7.5 <6 <500 1N5237A/B 8.2 <8 <500 1N5238A/B 1N5239A/B 8.7 9.1 <8 <10 1N5240A/B 10 <17 1N5241A/B 11 <22 1N5242A/B 12 <30 1N5243A/B 13 9.5 <13 1N5244A/B 14 9.0 <15 1N5245A/B 15 8.5 1N5246A/B 1N5247A/B 16 17 7.8 7.4 1N5248A/B 18 7.0 1N5249A/B 19 6.6 <30 20 <-0.080 1.0 <-0.075 <-0.060 <+0.055 2.0 2.0 <+0.030 <+0.030 3.0 <+0.038 3.5 <+0.038 4.0 <+0.045 5.0 <+0.050 6.0 <+0.058 6.5 <+0.062 6.5 7.0 <+0.065 <+0.068 8.0 <+0.075 <2 8.4 <+0.076 <1 9.1 <+0.077 <0.5 9.9 <+0.079 10 <+0.082 <16 11 <+0.082 <17 <19 12 13 <+0.083 <+0.084 <21 14 <+0.085 <23 14 <+0.086 5 0.25 3 <600 <0.1 1N5250A/B THRU 1N5281A/B SILICON PLANAR ZENER DIODES Zener Voltage range1) Type VZNOM3) IzT Maximum zener impedance1) Maximum Reverse Leakage Current Temp Coefficient of zener voltage IR2) at VR TKVZ rZjt and rZjk at IZK V mA V %/K 1N5250A/B 20 6.2 <25 15 <-0.086 1N5251A/B 1N5252A/B 22 24 5.6 5.2 <29

1.1V Max. @ IF = 200mA Electrical Characteristics @ 25 O C. Part # Jedec Type # 1N5221A 1N5222A 1N5223A 1N5224A 1N5225A 1N5226A 1N5227A 1N5228A 1N5229A 1N5230A 1N5231A 1N5232A 1N5233A 1N5234A 1N5235A 1N5236A 1N5237A 1N5238A 1N5239A 1N5240A 1N5241A 1N5242A 1N5243A 1N5244A 1N5245A 1N5246A 1N5247A 1N5248A 1N5249A 1N5250A 1N5251A 1N5252A 1N5253A 1N5254A 1N5255A or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B Max. Zener Impedance Nominal Zener Voltage, VZ (V) Test Current I ZT (mA) Z ZT @ I ZT () ZZK @ IZK = 0.25mA () 2.4 2.5 2.7 2.8 3.0 3.3 3.6 3.9 4.3 4.7 5.1 5.6 6.0 6.2 6.8 7.5 8.2 8.7 9.1 10 11 12 13 14 15 16 17 18 19 20 22 24 25 27 28 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 9.5 9.0 8.5 7.8 7.4 7.0 6.6 6.2 5.6 5.2 5.0 4.6 4.5 30 30 30 30 29 28 24 23 22 19 17 11 7 7 5 6 8 8 10 17 22 30 13 15 16 17 19 21 23 25 29 33 35 41 44 1200 1250 1300 1400 1600

ODES (4.7V to 62V) Data Sheet Electrical Characteristics @ 25 O C. Part # Jedec Type # 1N5230A or B 1N5231A or B 1N5232A or B 1N5233A or B 1N5234A or B 1N5235A or B 1N5236A or B 1N5237A or B 1N5238A or B 1N5239A or B 1N5240A or B 1N5241A or B 1N5242A or B 1N5243A or B 1N5244A or B 1N5245A or B 1N5246A or B 1N5247A or B 1N5248A or B 1N5249A or B 1N5250A or B 1N5251A or B 1N5252A or B 1N5253A or B 1N5254A or B 1N5255A or B 1N5256A or B 1N5257A or B 1N5258A or B 1N5259A or B 1N5260A or B 1N5261A or B 1N5262A or B 1N5263A or B 1N5264A or B 1N5265A or B Nominal Zener Voltage Test Current Izt Max 4.7 5.1 5.6 6.0 6.2 6.8 7.5 8.2 8.7 9.1 10 11 12 13 14 15 16 17 18 19 20 22 24 25 27 28 30 33 36 39 43 47 51 56 60 62 20 20 20 20 20 20 20 20 20 20 20 20 20 9.5 9.0 8.5 7.8 7.4 7.0 6.6 6.2 5.6 5.2 5.0 4.6 4.5 4.2 3.8 3.4 3.2 3.0 2.7 2.5 2.2 2.1 2.0 MAX. ZENER IMPEDANCE Zzt @ Izt Ohms Zzk @ Izk = 0.25mA Ohms 19 17 11 7 7 5 6 8 8 10 17 22 30 13 15 16 17 19 21 23 25 29 33 35 41 44 49 58 70 80 93 105 125 150 170 1

1 1N5232 1N5232A 1N5232B 1N5232C 1N5232D 1N5233 1N5233A 1N5233B 1N5233C 1N5233D 1N5232B 1N5232B 1N5232B 1N5232C 1N5232D 1N5233B 1N5233B 1N5233B 1N5233C 1N5233D 6-11 6-11 6-11 6-11 6-11 6-11 6-11 6-11 6-11 6-11 1N5242 1N5242A 1N5242B 1N5242C 1N5242D 1N5243 1N5243A 1N5243B 1N5243C 1N5243D 1N5242B 1N5242B 1N5242B 1N5242C 1N5242D 1N5243B 1N5243B 1N5243B 1N5243C 1N5243D 6-11 6-11 6-11 6-11 6-11 6-11 6-11 6-11 6-11 6-11 1N5234 1N5234A 1N5234B 1N5234C 1N5234D 1N5235 1N5235A 1N5235B 1N5235C 1N5235D 1N5234B 1N5234B 1N5234B 1N5234C 1N5234D 1N5235B 1N5235B 1N5235B 1N5235C 1N5235D 6-11 6-11 6-11 6-11 6-11 6-11 6-11 6-11 6-11 6-11 1N5244 1N5244A 1N5244B 1N5244C 1N5244D 1N5245 1N5245A 1N5245B 1N5245C 1N5245D 1N5244B 1N5244B 1N5244B 1N5244C 1N5244D 1N5245B 1N5245B 1N5245B 1N5245C 1N5245D 6-11 6-11 6-11 6-11 6-11 6-11 6-11 6-11 6-11 6-11 CF = consult factory representative Cross Reference and Index 2-26 Motorola TVS/Zener Device Data CROSS-REFERENCE (continued) Industry Part Number Motorola Direct Replacement Mo

ing the 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 & BUR thru 1N5242AUR & BUR) b. IZT = Rated IZT, T1 = 25oC, T2 = 125oC (1N5243AUR & BUR thru 1N5281AUR & BUR) 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 thru 1N5281BUR or as MLL5221 thru MLL5281B part numbers. o TEMPERATURE COEFFICIENT %/ C TEMPERATURE COEFFICIENT mV/oC RATED POWER DISSIPATION GRAPHS TEC TA TEC - End Cap Temperature (oC), or TA Ambient Temperature on FR4 PC BOARD Voltage Temperature Coefficient %/oC mV Change /C NOMINAL ZENER VOLTAGE (VOLTS) FIGURE 1 POWER DERATING CURVE FIGURE 2 ZENER VOLTAGE TEMPERATURE COEFFICIENT vs. ZENER VOLTAGE 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 A B C MI

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

pedance with different operating currents. 3. Temperature coefficient (VZ). Test conditions for temperature coefficient are as follows: o o a. IZT = 7.5 mA, T1 = 25 C, T2 = 125 C (1N5221A, B thru 1N5242A, B). o o b. IZT = Rated IZT, T1 = 25 C, T2 = 125 C (1N5243A, B thru 1N5281A, B). (Device to be temperature stabilized with current applied prior to reading breakdown voltage at the specified ambient temp.) Copyright (c) 2005 8-29-2005 REV B Microsemi Scottsdale Division 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503 Page 2 1N52211N5281B, e3 DO-7 Test Current IZT mA WWW . Microsemi .C OM JEDEC Type No. Note 1 Nominal Zener Voltage VZ @ IZT Volts 1N5221 thru 1N5281,e3 DO-7 500 mW GLASS AXIAL-LEAD ZENER DIODES SCOTTSDALE DIVISION Pd, Rated Power Dissipation (mW) WWW . Microsemi .C OM GRAPHS TL Lead Temperature at 3/8" From Body or TA on FR4 PC Board FIGURE 1 POWER DERATING CURVE FIGURE 2 CAPACITANCE vs. ZENER VOLTAGE (TYPICAL) PACKAGE DIMENSIONS 1N52211

pedance with different operating currents. 3. Temperature coefficient (VZ). Test conditions for temperature coefficient are as follows: o o a. IZT = 7.5 mA, T1 = 25 C, T2 = 125 C (1N5221A, B thru 1N5242A, B). o o b. IZT = Rated IZT, T1 = 25 C, T2 = 125 C (1N5243A, B thru 1N5281A, B). (Device to be temperature stabilized with current applied prior to reading breakdown voltage at the specified ambient temp.) Copyright 2003 11-05-2003 REV B Microsemi Scottsdale Division 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503 Page 2 1N5221 - 1N5281B (DO-35) Test Current IZT mA WWW . Microsemi .C OM JEDEC Type No. Note 1 Nominal Zener Voltage VZ @ IZT Volts 1N5221 thru 1N5281B DO-35 500 mW GLASS AXIAL-LEAD ZENER DIODES SCOTTSDALE DIVISION Pd, Rated Power Dissipation (mW) WWW . Microsemi .C OM GRAPHS TL Lead Temperature at 3/8" From Body or TA on FR4 PC Board FIGURE 1 POWER DERATING CURVE FIGURE 2 CAPACITANCE vs. ZENER VOLTAGE (TYPICAL) PACKAGE DIMENSIONS 1N5221 -

pedance with different operating currents. 3. Temperature coefficient (VZ). Test conditions for temperature coefficient are as follows: o o a. IZT = 7.5 mA, T1 = 25 C, T2 = 125 C (1N5221A, B thru 1N5242A, B). o o b. IZT = Rated IZT, T1 = 25 C, T2 = 125 C (1N5243A, B thru 1N5281A, B). (Device to be temperature stabilized with current applied prior to reading breakdown voltage at the specified ambient temp.) Copyright (c) 2005 8-29-2005 REV C Microsemi Scottsdale Division 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503 Page 2 1N5221-1N5281B,e3 DO-35 Test Current IZT mA WWW . Microsemi .C OM JEDEC Type No. Note 1 Nominal Zener Voltage VZ @ IZT Volts 1N5221 thru 1N5281B, e3 DO-35 500 mW GLASS AXIAL-LEAD ZENER DIODES SCOTTSDALE DIVISION Pd, Rated Power Dissipation (mW) WWW . Microsemi .C OM GRAPHS TL Lead Temperature at 3/8" From Body or TA on FR4 PC Board FIGURE 1 POWER DERATING CURVE FIGURE 2 CAPACITANCE vs. ZENER VOLTAGE (TYPICAL) PACKAGE DIMENSIONS 1N5

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