1N5243BTA2 - Tak Cheong Electronics (Holdings) Co., Ltd.

December 2005 / B http://takcheong.com

Licensed by ON Semiconductor,

A trademark of semiconductor

Components Industries, LLC for

Zener Technology and Products.

TAK CHEON

500 mW DO-35 Hermetically

Sealed Glass Zener Voltage

Regulators

Maximum Ratings (Note 1)

Rating Symbol Value Units

Maximum Steady State Power Dissipation

@TL≤75℃, Lead Length = 3/8”

Derate Above 75℃

500

4.0

mW/℃

Operating and Storage

Temperature Range TJ, Tstg -65 to +200 °C

Note 1: Some part number series have lower JEDEC registered ratings.

Specification Features:

 Zener Voltage Range = 2.4V to 200V

 ESD Rating of Clas 3 (>6 KV) per Human Body Model

 DO-35 Package (DO-204AH)

 Double Slug Type Construction

 Metallurgical Bonded Construction

Specification Features:

Case : Double slug type, hermetically sealed glass

Finish : All external surfaces are corrosion resistant and leads are readily solderable

Polarity : Cathode indicated by polarity band

Mounting: Any

Maximum Lead Temperature for Soldering Purposes

230℃, 1/16” from the case for 10 seconds

Ordering Information

Device Package Quantity

1N52xxB Axial Lead 3000 Units / Box

1N52xxBRL Axial Lead 5000 Units / Tape & Reel

1N52xxBRL2* Axial Lead 5000 Units / Tape & Reel

1N52xxBRR1 ! Lead Form 3000 Units / Radial Tape & Reel

1N52xxBRR2 i Lead Form 3000 Units / Radial Tape & Reel

1N52xxBTA Axial Lead 5000 Units / Tape & Ammo

1N52xxBTA2* Axial Lead 5000 Units / Tape & Ammo

1N52xxBRA1 ! Axial Lead 3000 Units / Radial Tape & Ammo

1N52xxBRA2 i Axial Lead 3000 Units / Radial Tape & Ammo

* The “2” suffix refer to 26mm tape spacing.

! “1”: Polarity band up with cathode lead off first.

i “2”: Polarity band down with cathode lead off first.

1N5221B through 1N5281B Series

Cathode Anode

L = Logo

52xxB = 1N52xxB Device Code

Devices listed in bold italic are Tak Cheong Preferred

devices. Preferred devices are recommended choices

for future use and best overall value.

AXIAL LEAD

DO35

1N5221B through 1N5281B Series

http://www.takcheong.com

ELECTRICAL CHARACTERISTICS (TA = 25ºC unless

otherwise noted. Based on DC measurements at thermal

equilibrium; lead length = 3/8”; thermal resistance of heat sink =

30°C/W, VF = 1.1 V Max @ IF = 200mA for all types)

Symbol Parameter

VZReverse Zener Voltage @ IZT

IZT Reverse Zener Current

ZZT Maximum Zener Impedance @ IZT

IZk Reverse Zener Current

IRReverse Leakage Current @ VR

VRReverse Voltage

IFForward Current

VFForward Voltage @ IF

θVZ Maximum Zener Voltage Temperature Coefficient

ELECTRICAL CHARACTERISTICS (TA = 25ºC unless otherwise noted, VF = 1.1 V Max @ IF = 200mA for all types)

Zener Voltage (Note 3.) Zener Impedance (Note 4.) Leakage Current

VZ (Volts) @ IZT ZZT @ IZT ZZK @ IZK IR @ VR

θθ

θVZ

(Note 5.)

Device

(Note 2.) Device

Marking Min Nom Max (mA) (Ω

ΩΩ

Ω)(

Ω

ΩΩ

Ω)(mA) (µ

µµ

µA) (Volts) (%/ºC)

1N5221B 1N5221B 2.28 2.4 2.52 20 30 1200 0.25 100 1 -0.085

1N5222B 1N5222B 2.375 2.5 2.625 20 30 1250 0.25 100 1 -0.085

1N5223B 1N5223B 2.565 2.7 2.835 20 30 1300 0.25 75 1 -0.08

1N5224B 1N5224B 2.66 2.8 2.94 20 30 1400 0.25 75 1 -0.08

1N5225B 1N5225B 2.85 3 3.15 20 29 1600 0.25 50 1 -0.075

1N5226B 1N5226B 3.135 3.3 3.465 20 28 1600 0.25 25 1 -0.07

1N5227B 1N5227B 3.42 3.6 3.78 20 24 1700 0.25 15 1 -0.065

1N5228B 1N5228B 3.705 3.9 4.095 20 23 1900 0.25 10 1 -0.06

1N5229B 1N5229B 4.085 4.3 4.515 20 22 2000 0.25 5 1 ±0.055

1N5230B 1N5230B 4.465 4.7 4.935 20 19 1900 0.25 5 2 ±0.03

1N5231B 1N5231B 4.845 5.1 5.355 20 17 1600 0.25 5 2

±±

0.03

1N5232B 1N5232B 5.32 5.6 5.88 20 11 1600 0.25 5 3 +0.038

1N5233B 1N5233B 5.7 6 6.3 20 7 1600 0.25 5 3.5 +0.038

1N5234B 1N5234B 5.89 6.2 6.51 20 7 1000 0.25 5 4 +0.045

1N5235B 1N5235B 6.46 6.8 7.14 20 5 750 0.25 3 5 +0.05

2. TOLERANCE AND TYPE NUMBER DESIGNATION (VZ)

The type numbers listed have a st andard tolerance on the nominal zener voltage of ±5%.

3. ZENER VOLTAGE (VZ) MEASUREMENT

Nominal zener voltage is measured with the device junction in the thermal equilibrium at the lead temperature (TL) at 30°C

±1°C and 3/8” lead length.

4. ZENER IMPEDANCE (ZZ) DERIVATION

ZZT and ZZK are measured by dividing the AC voltage drop across the device by the AC current appl i ed. The specified l imits

are for IZ(AC) = 0.1 IZ(DC) with AC frequenc y = 60Hz.

5. TEMPERATURE COEFFICIENT (θ

θθ

θVZ)

Test conditions for temperature coefficient are as follows:

A. IZT = 7.5mA, T1 = 25°C, T2 = 125°C (1N5221B through 1N5242B)

B. IZT = Rated IZT, T1 = 25 °C, T 2 = 125°C (1N5243B through 1N5281B)

Device to be temperature stabilized with current applied prior to reading break down voltage at t he specified am bi ent

temperat ure.

1N5221B through 1N5281B Series

http://www.takcheong.com

ELECTRICAL CHARACTERISTICS (TA = 25ºC unless otherwise noted, VF = 1.1 V Max @ IF = 200mA for all types)

Zener Voltage (Note 7.) Zener Impedance (Note 8.) Leakage Current

VZ (Volts) @ IZT ZZT @ IZT ZZK @ IZK IR @ VR

θθ

θVZ

(Note 9.)

Device

(Note 6.) Device

Marking Min Nom Max (mA) (Ω

ΩΩ

Ω)(

Ω

ΩΩ

Ω)(mA) (µ

µµ

µA) (Volts) (%/ºC)

1N5236B 1N5236B 7.125 7.5 7.875 20 6 500 0.25 3 6 +0.058

1N5237B 1N5237B 7.79 8.2 8.61 20 8 500 0.25 3 6.5 +0.062

1N5238B 1N5238B 8.265 8.7 9.135 20 8 600 0.25 3 6.5 +0.065

1N5239B 1N5239B 8.645 9.1 9.555 20 10 600 0.25 3 7 +0.068

1N5240B 1N5240B 9.5 10 10.5 20 17 600 0.25 3 8 +0.075

1N5241B 1N5241B 10.45 11 11.55 20 22 600 0.25 2 8.4 +0.076

1N5242B 1N5242B 11.4 12 12.6 20 30 600 0.25 1 9.1 +0.077

1N5243B 1N5243B 12.35 13 13.65 9.5 13 600 0.25 0.5 9.9 +0.079

1N5244B 1N5244B 13.3 14 14.7 9 15 600 0.25 0.1 10 +0.082

1N5245B 1N5245B 14.25 15 15.75 8.5 16 600 0.25 0.1 11 +0.082

1N5246B 1N5246B 15.2 16 16.8 7.8 17 600 0.25 0.1 12 +0.083

1N5247B 1N5247B 16.15 17 17.85 7.4 19 600 0.25 0.1 13 +0.084

1N5248B 1N5248B 17.1 18 18.9 7 21 600 0.25 0.1 14 +0.085

1N5249B 1N5249B 18.05 19 19.95 6.6 23 600 0.25 0.1 14 +0.086

1N5250B 1N5250B 19 20 21 6.2 25 600 0.25 0.1 15 +0.086

1N5251B 1N5251B 20.9 22 23.1 5.6 29 600 0.25 0.1 17 +0.087

1N5252B 1N5252B 22.8 24 25.2 5.2 33 600 0.25 0.1 18 +0.088

1N5253B 1N5253B 23.75 25 26.25 5 35 600 0.25 0.1 19 +0.089

1N5254B 1N5254B 25.65 27 28.35 4.6 41 600 0.25 0.1 21 +0.09

1N5255B 1N5255B 26.6 28 29.4 4.5 44 600 0.25 0.1 21 +0.091

1N5256B 1N5256B 28.5 30 31.5 4.2 49 600 0.25 0.1 23 +0.091

1N5257B 1N5257B 31.35 33 34.65 3.8 58 700 0.25 0.1 25 +0.092

1N5258B 1N5258B 34.2 36 37.8 3.4 70 700 0.25 0.1 27 +0.093

1N5259B 1N5259B 37.05 39 40.95 3.2 80 800 0.25 0.1 30 +0.094

1N5260B 1N5260B 40.85 43 45.15 3 93 900 0.25 0.1 33 +0.095

1N5261B 1N5261B 44.65 47 49.35 2.7 105 1000 0.25 0.1 36 +0.095

1N5262B 1N5262B 48.45 51 53.55 2.5 125 1100 0.25 0.1 39 +0.096

1N5263B 1N5263B 53.2 56 58.8 2.2 150 1300 0.25 0.1 43 +0.096

1N5264B 1N5264B 57 60 63 2.1 170 1400 0.25 0.1 46 +0.097

1N5265B 1N5265B 58.9 62 65.1 2 185 1400 0.25 0.1 47 +0.097

6. TOLERANCE AND TYPE NUMBER DESIGNATION (VZ)

The type numbers listed have a st andard tolerance on the nominal zener voltage of ±5%.

7. ZENER VOLTAGE (VZ) MEASUREMENT

Nominal zener voltage is measured with the device junction in the thermal equilibrium at the lead temperature (TL) at 30°C

±1°C and 3/8” lead length.

8. ZENER IMPEDANCE (ZZ) DERIVATION

ZZT and ZZK are measured by dividing the AC voltage drop across the device by the AC current appl i ed. The specified l imits

are for IZ(AC) = 0.1 IZ(DC) with AC frequenc y = 60Hz.

9. TEMPERATURE COEFFICIENT (θ

θθ

θVZ)

Test conditions for temperature coefficient are as follows:

A. IZT = 7.5mA, T1 = 25°C, T2 = 125°C (1N5221B through 1N5242B)

B. IZT = Rated IZT, T1 = 25 °C, T 2 = 125°C (1N5243B through 1N5281B)

Device to be temperature stabilized with current applied prior to reading break down voltage at t he specified am bi ent

temperat ure.

1N5221B through 1N5281B Series

http://www.takcheong.com

ELECTRICAL CHARACTERISTICS (TA = 25ºC unless otherwise noted, VF = 1.1 V Max @ IF = 200mA for all types)

Zener Voltage (Note 11.) Zener Impedance (Note 12.) Leakage Current

VZ (Volts) @ IZT ZZT @ IZT ZZK @ IZK IR @ VR

θθ

θVZ

(Note 13.)

Device

(Note 10.) Device

Marking Min Nom Max (mA) (Ω

ΩΩ

Ω)(

Ω

ΩΩ

Ω)(mA) (µ

µµ

µA) (Volts) (%/ºC)

1N5266B 1N5266B 64.6 68 71.4 1.8 230 1600 0.25 0.1 52 +0.097

1N5267B 1N5267B 71.25 75 78.75 1.7 270 1700 0.25 0.1 56 +0.098

1N5268B 1N5268B 77.9 82 86.1 1.5 330 2000 0.25 0.1 62 +0.098

1N5269B 1N5269B 82.65 87 91.35 1.4 370 2200 0.25 0.1 68 +0.099

1N5270B 1N5270B 86.45 91 95.55 1.4 400 2300 0.25 0.1 69 +0.099

1N5271B 1N5271B 95 100 105 1.3 500 2600 0.25 0.1 76 +0.11

1N5272B 1N5272B 104.5 110 115.5 1.1 750 3000 0.25 0.1 84 +0.11

1N5273B 1N5273B 114 120 126 1 900 4000 0.25 0.1 91 +0.11

1N5274B 1N5274B 123.5 130 136.5 0.95 1100 4500 0.25 0.1 99 +0.11

1N5275B 1N5275B 133 140 147 0.9 1300 4500 0.25 0.1 106 +0.11

1N5276B 1N5276B 142.5 150 157.5 0.85 1500 5000 0.25 0.1 114 +0.11

1N5277B 1N5277B 152 160 168 0.8 1700 5500 0.25 0.1 122 +0.11

1N5278B 1N5278B 161.5 170 178.5 0.74 1900 5500 0.25 0.1 129 +0.11

1N5279B 1N5279B 171 180 189 0.68 2200 6000 0.25 0.1 137 +0.11

1N5280B 1N5280B 180.5 190 199.5 0.66 2400 6500 0.25 0.1 144 +0.11

1N5281B 1N5281B 190 200 210 0.65 2500 7000 0.25 0.1 152 +0.11

10. TOLERANCE AND TYPE NUMBER DESIGNATION (VZ)

The type numbers listed have a standard tolerance on the nominal zener vol tage of ±5%.

11. ZENER VOLTAGE (VZ) MEASUREMENT

Nominal zener voltage is measured with the device junction in the thermal equilibrium at the lead temperature (T L) at 30°C

±1°C and 3/8” lead length.

12. ZENER IMPEDANCE (ZZ) DE RIVATION

ZZT and ZZK are measured by divi di ng the AC voltage drop across t he devic e by the AC current appli e d. The specified limits

are for IZ(AC) = 0.1 IZ(DC) with AC frequency = 60Hz.

13. TEMPERATURE COEFFICIENT (θ

θθ

θVZ)

Test conditions for temperat ure coeffici ent are as follows:

A. IZT = 7.5mA, T 1 = 25°C, T2 = 125°C (1N5221B through 1N5242B)

B. IZT = Rated IZT, T 1 = 25°C, T2 = 125°C (1N5243B through 1N5281B)

Device to be temperature stabilized with c urrent appli ed pri or to reading breakdown voltage at the specified ambient

temperature.

1N5221B through 1N5281B Series

http://www.takcheong.com

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0 20 40 60 80 100 120 140 160 180 200

TL, LEAD TEMPERATURE (°C)

Figure 1. Steady State Power Derating

HEAT

SINKS

3/8" 3/8"

PD, MAXIMUM STEADY STATE

POWER DISSIPATION (WATTS)

1N5221B through 1N5281B Series

http://www.takcheong.com

APPLICATION NOTE - ZENER VOLTAGE

Since the actual voltage available from a given zener

diode is temperature dependent, it is necessary to determine

junction temperature under any set of operating conditions

in order to calculate its value. The following procedure is

recommended:

Lead Temperature, TL, should be determined from:

TL = θLAPD + TA.

θLA is the lead-to-ambient thermal resistance (°C/W) and PD

is the power dissipation. The value for θLA will vary and

depends o n the device mounting method. θLA is generally 30

to 40°C/W for the various clips and tie points in common use

and for printed circuit board wiring.

The temperature of the lead can also be measured using a

thermocouple placed on the lead as close as possible to the

tie point. The thermal mass connected to the tie point is

normally large enough so that it will not significantly

respond to heat surges generated in the diode as a result of

pulsed operation once steady-state conditions are achieved.

Using the measured value of TL, the junction temperature

may be determined by:

TJ = TL + ∆TJL.

∆TJL is the increase in junction temperature above the lead

temperature and may be found from Figure 2 for dc power:

∆TJL = θJLPD.

For worst-case design, using expected limits of IZ, limits

of PD and the extremes of TJ(∆TJ) may be estimated.

Changes in voltage, VZ, can then be found from:

∆V = θVZTJ.

θVZ, the zener voltage temperature coefficient, is found

from Figures 4 and 5.

Under high power -pulse operation, the zener voltage will

vary with time and may also be affected significantly by the

zener resistance. For best regulation, keep current

excursions as low as possible.

Surge limitations are given in Figure 7. They are lower

than would be expected by considering only junction

temperature, a s current crowding ef fects cause temperatures

to be extremely high in small spots, resulting in device

degradation should the limits of Figure 7 be exceeded.

500

400

300

200

100

0 0.2 0.4 0.6 0.8 1

2.4-60 V

62-200V

L , LEAD LENGTH TO HEAT SINK (INCH)

JL, JUNCTION TOLEAD THERMAL RESISTANCE(°C/W)θ

Figure 2. Typical Thermal Resistance

TYPICAL LEAKAGE CURRENT

AT 80% OF NOMINAL

BREAKDOWN VOLTAGE

+25°C

+125°C

1000

7000

5000

2000

1000

700

500

200

100

0.7

0.5

0.2

0.1

0.07

0.05

0.02

0.01

0.007

0.005

0.002

0.001

34 5 6 7 8 9101112

VZ , NOMINAL ZENER VOLTAGE (VOLTS)

I, LEAKAGE CURRENT ( A)µR

Figure 3. Typical Leakage Current

13 14 15

1N5221B through 1N5281B Series

http://www.takcheong.com

+12

+10

-2

-4

VZ , ZENER VOLTAGE (VOLTS)

Figure 4a. Range for Units to 12 Volts

VZ@IZT

(NOTE 2)

RANGE

TEMPERATURE COEFFICIENTS

(-55°C to +150°C temperature range; 90% of the units are in the ranges indicated.)

100

26 10 20 30 50 70 100

VZ , ZENER VOLTAGE (VOLTS)

Figure 4b. Range for Units 12 to 100 Volts

RANGE VZ@IZ(NOTE 2)

120 130 140 150 160 170 180 190 200

200

180

160

140

120

100

VZ , ZENER VOLTAGE (VOLTS)

Figure 4c. Range for Units 120 to 200 Volts

VZ @ IZT

(NOTE 2)

-2

-4

VZ , ZENER VOLTAGE (VOLTS)

Figure 5. Effect of Zener Current

NOTE: BELOW 3 VOLTS AND ABOVE 8 VOL TS

NOTE: CHANGES IN ZENER CURRENT DO NOT

NOTE: AFFECT TEMPERATURE COEFFICIENTS

1mA

0.01mA

VZ @ IZ

TA=25 °C

1000

C, CAP ACIT ANCE (pF)

500

200

100

1 2 5 10 20 50 100

VZ, ZENER VOLTAGE (VOLTS)

Figure 6a. Typical Capacitance 2.4-100 Volts

TA = 25°C

0V BIAS

1V BIAS

50% OF

VZBIAS

100

120 140 160 180 190 200 220

VZ, ZENER VOLTAGE (VOLTS)

Figure 6b. Typical Capacitance 120-200 Volts

T= 25 °C

1 VOLT BIAS

50% OF V BIAS

0 BIAS

θVZ

TEMPERA TURE COEFFICIENT (mV/ °C)

20mA

C, CAP ACIT ANCE (pF) θVZ

TEMPERATURE COEFFICIENT (mV/ °C)θVZ

TEMPERATURE COEFFICIENT (mV/°C)

θVZ, TEMPERA TURE COEFFICIENT (mV/°C)

345 710

11 12

5678

1N5221B through 1N5281B Series

http://www.takcheong.com

100

0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 20 50 100 200 500 1000

Ppk , PEAK SURGE POWER (WATTS)

PW, PULSE WIDTH (ms)

5% DUTY CYCLE

10% DUTY CYCLE

20% DUTY CYCLE

11V-91V NONREPETITIVE

1.8V-10V NONREPETITIVE

RECT ANGULAR

WAVEFORM

TJ= 25°C PRIOR TO

INITIAL PULSE

Figure 7a. Maximum Surge Power 1.8-91 Volts

1000

700

500

300

200

100

0.01 0.1 1 10 100 1000

Ppk , PEAK SURGE POWER (WATTS)

PW, PULSE WIDTH (ms)

Figure 7b. Maximum Surge Power DO-35

100-200Volts

1000

500

200

100

0.1 0.2 0.5 1 2 5 10 20 50 100

IZ , ZENER CURRENT (mA)

Figure 8. Effect of Zener Current on

Zener Impedance

ZZ, DYNAMIC IMPEDANCE (OHMS)

1000

700

500

200

100

1 2 3 5 7 10 20 30 50 70 100

VZ, ZENER VOLTAGE (VOLTS)

Figure 9. Effect of Zener Voltage on Zener Impedance Figure 10. T ypical Forward Characteristics

RECT ANGULAR

WAVEFORM, TJ = 25°C

100-200VOLTS NONREPETITIVE

TJ= 25°C

iZ (rms) = 0.1 IZ (dc)

f = 60Hz

IZ=1mA

5mA

20mA

TJ= 25°C

iZ(rms)=0.1 Iz(dc)

f = 60 Hz

VZ = 2.7V

47V

27V

6.2V

VF, FORWARD VOLTAGE (VOLTS)

0.4 0.5 0.6 0.7 0.8 0.9 1 1.1

1000

500

200

100

IF, FOR WARD CURRENT (mA)

MINIMUM

MAXIMUM

150 °C

75°C

0°C

25°C

1N5221B through 1N5281B Series

http://www.takcheong.com

Figure 1 1. Zener Voltage versus Zener Current - VZ = 1 thru 16 Volts

VZ, ZENER VOLTAGE (VOLTS)

IZ, ZENER CURRENT (mA)

0.1

0.01

12 5 78910111213141516

TA= 25°C

Figure 12. Zener Voltage versus Zener Current - VZ = 15 thru 30 Volts

VZ , ZENER VOLTAGE (VOLTS)

15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

0.1

0.01

TA= 25°C

IZ, ZENER CURRENT (mA)

1N5221B through 1N5281B Series

http://www.takcheong.com

Figure 13. Zener Voltage versus Zener Current - VZ = 30 thru 105 Volts

VZ , ZENER VOLTAGE (VOLTS)

0.1

0.01

30 35 40 45 50 55 60 70 75 80 85 90 95 100

Figure 14. Zener Voltage versus Zener Current - VZ = 110 thru 220 Volts

VZ, ZENER VOLTAGE (VOLTS)

110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260

0.1

0.01

TA= 25°

65 105

IZ, ZENER CURRENT (mA)IZ, ZENER CURRENT (mA)