Skip to main content

We use cookies to understand how you use our site and improve your experience. See our Privacy Policy.

1SMB5914BT3G

Zener Diode

The 1SMB5914BT3G is a zener diode from onsemi. View the full 1SMB5914BT3G datasheet below including key specifications, electrical characteristics, absolute maximum ratings.

1SMB5914BT3G shares its datasheet with 1SMB5913BT3G, whose page lists every part number it covers.

Official 1SMB5914BT3G datasheet (PDF) — the source this page was extracted from.

Manufacturer

onsemi

Category

Diodes

Package

SMB

1SMB5914BT3G Key Specifications

ParameterValue
Breakdown Voltage21 V
Case/PackageSMB
China RoHSNon-Compliant
CompositionZener
Contact PlatingTin
Reverse Leakage Current1 µA @ 15.2 V
Element ConfigurationSingle
ESD ProtectionYes
Forward Voltage1.5 V
Halogen FreeHalogen Free
Height2.28 mm
Impedance14 Ω
Zener Impedance14 Ohms Ω
Introduction Date1999-01-01
Lead FreeLead Free
Length4.6 mm
Lifecycle StatusProduction (Last Updated: 5 years ago)
Manufacturer Lifecycle StatusACTIVE (Last Updated: 5 years ago)
MaterialPlastic
Max Operating Temperature150 °C
Max Power Dissipation550 mW
Max Reverse Leakage Current1 µA
Min Operating Temperature-65 °C
Mounting TypeSurface Mount
Number of Elements1
Number of Pins2
Number of Terminals2
Operating Temperature-65°C ~ 150°C
Package / CaseDO-214AA, SMB
PackagingTape and Reel
Peak Reverse Current1 µA
PolarityUnidirectional
Power (Max)3 W
Power Dissipation550 mW
Power Rating3 W
Radiation HardeningNo
REACH SVHCNo
Reference Voltage20 V
RoHSCompliant
Schedule B8541100050, 8541100050|8541100050, 8541100050|8541100050|8541100050, 8541100050|8541100050|8541100050|8541100050
Supplier Device PackageSMB
TerminationSMD/SMT
Test Current18.7 mA
Tolerance±5%
Tolerance5 %
Forward Voltage (Max)1.5 V @ 200 mA
Zener Voltage20 V
Voltage Rating (DC)20 V
Voltage Tolerance5 %
Width3.95 mm
Working Voltage20 V
Zener Current18.7 mA
Zener Voltage20 V

1SMB5914BT3G Overview

Part: 1SMB59xxBT3G Series, SZ1SMB59xxT3G Series — onsemi

Type: Zener Voltage Regulator Diode

Description: A series of 3 W Zener diodes with a Zener voltage range of 3.3 V to 200 V, featuring ESD rating of Class 3 (> 16 kV) per Human Body Model.

Operating Conditions:

  • Operating temperature: -65 to +150 °C

Absolute Maximum Ratings:

  • Max steady state power dissipation (T_L = 75 °C): 3.0 W
  • Max steady state power dissipation (T_A = 25 °C): 550 mW
  • Max junction/storage temperature: +150 °C

Key Specs:

  • Zener Voltage (V_Z): 3.3 V to 200 V (Nominal)
  • Forward Voltage (V_F): 1.5 V Max. @ I_F = 200 mA(dc)
  • Maximum Zener Impedance (Z_ZT): 2 Ω to 1200 Ω @ I_ZT (device dependent)
  • Reverse Leakage Current (I_R): 1 μA to 100 μA @ V_R (device dependent)
  • Maximum DC Zener Current (I_ZM): Varies by device (e.g., 113.6 mA for 3.3V, 1.9 mA for 200V)
  • Thermal Resistance from Junction-to-Lead (R_θJL): 25 °C/W
  • Thermal Resistance from Junction-to-Ambient (R_θJA): 226 °C/W

Features:

  • ESD Rating of Class 3 (> 16 kV) per Human Body Model
  • Zener Voltage Range -3.3 V to 200 V
  • Flat Handling Surface for Accurate Placement
  • AEC-Q101 Qualified and PPAP Capable (SZ1SMB59xxT3G)
  • Package Design for Top Side or Bottom Circuit Board Mounting
  • SZ Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements
  • Pb-Free Devices

Applications:

Package:

  • SMB (CASE 403A)

1SMB5914BT3G Features

  • ESD Rating of Class 3 (> 16 kV) per Human Body Model
  • Zener Voltage Range -3.3 V to 200 V
  • Flat Handling Surface for Accurate Placement
  • AEC -Q101 Qualified and PPAP Capable -SZ1SMB59xxT3G
  • Package Design for Top Side or Bottom Circuit Board Mounting
  • SZ Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements
  • These are Pb -Free Devices*

1SMB5914BT3G Electrical Characteristics

(T L = 30 ° C unless otherwise noted,

VF = 1.5 V Max. @ I F = 200 mA(dc) for all types)

SymbolParameter
V ZReverse Zener Voltage @I ZT
I ZTReverse Current
Z ZTMaximum Zener Impedance @I ZT
I ZKReverse Current
Z ZKMaximum Zener Impedance @I ZK
I RReverse Leakage Current@V R
V RReverse Voltage
I FForward Current
V FForward Voltage @I F
I ZMMaximum DC Zener Current

ELECTRICAL CHARACTERISTICS (T L = 30 C unless otherwise noted, V F = 1.5 V Max. @ I F = 200 mA(dc) for all types)

°

(Devices listed in bold, italic are onsemi Preferred devices.)

Zener Voltage (Note 3)Zener Impedance (Note 4)Leakage Current
Device*DeviceV Z (Volts)@I ZTZ ZT @I ZTZ ZK @I ZKI R @V R
(Note 2)MarkingMinNomMaxmAWWmAm A
1SMB5913BT3G 1SMB5914BT3G 1SMB5915BT3G 1SMB5916BT3G913B 914B 915B3.13 3.42 3.70 4.083.3 3.6 3.9 4.33.47 3.78 4.10113.6 104.2 96.1 87.210 9 7.5 6500 500 500 916B 5001 1 1100 75 25
1SMB5917BT3G 1SMB5918BT3G 1SMB5919BT3G 1SMB5920BT3G917B 918B 919B 920B4.46 4.84 5.32 5.894.7 5.1 5.6 6.24.52 4.94 5.36 5.8879.8 73.5 66.9 60.55 4 2 2500 350 250 2001 1 1 1 15 5 5 5
1SMB5921BT3G 1SMB5922BT3G 1SMB5923BT3G 1SMB5924BT3G921B 922B 923B 924B6.46 7.12 7.79 8.646.8 7.5 8.2 9.16.51 7.14 7.88 8.6155.1 50 45.72.5 3 3.5 4200 400 400 5005 1 0.5 0.55 5 5
1SMB5925BT3G 1SMB5926BT3G 1SMB5927BT3G925B 926B 927B9.5 10.45 11.4 12.3510 11 12 139.56 10.541.2 37.5 34.1 31.24.5 5.5 6.5 7500 550 550 5500.55 5 1 1
1SMB5928BT3G 1SMB5929BT3G 1SMB5930BT3G 23.4 1SMB5931BT3G 20.8928B 929B 930B14.25 15.2 17.115 16 18 2011.55 12.6 13.65 15.75 16.8 18.928.8 259 10 12600 600 6500.25 0.25 0.25 0.25 0.25 11 1
1SMB5932BT3G 1SMB5933BT3G 1SMB5934BT3G 1SMB5935BT3G931B 932B 933B 934B19 20.9 22.822 24 2721 23.1 25.2 28.35 31.518.7 1714 17.5 19 23650 650 700 7000.25 0.25 0.251 1 1 1 1
1SMB5936BT3G 1SMB5937BT3G 1SMB5938BT3G 10.4935B 936B25.65 28.5 31.35 34.230 33 36 3934.65 37.8 40.9515.6 13.9 12.5 11.428 33750 937B 800 938B 8500.25 0.25 0.25 0.251 1
1SMB5939BT3G 9.6 1SMB5940BT3G 1SMB5941BT3G 1SMB5942BT3G 1SMB5943BT3G939B 940B 941B 942B37.05 40.85 44.65 48.45 53.2 58.943 47 51 56 62 6845.15 49.35 53.55 58.8 65.18.7 8 7.3 6.767 70 86 100900 950 1000 1100 1300 15000.25 0.25 0.25 0.25 0.251 1 1 1 1
1SMB5944BT3G 1SMB5945BT3G 1SMB5946BT3G943B 944B 945B 946B 947B 948B71.25 77.9 86.45 9575 82 9171.4 78.75 86.1 95.556 5.5 5 4.6 4.1120 140 160 2001700 2000 2500 3000 31000.25 0.25 0.25 0.251 1 1
1SMB5948BT3G 1SMB5949BT3G 1SMB5951BT3G949B 951B 952B114 123.5100 120 130105 126 136.53.7 3.1250 3804500 50000.25 0.251 1
1SMB5952BT3G953B 954B142.5 1521502.9 2.5 2.3450 6006000 65000.25 0.251
1SMB5953BT3G 1SMB5954BT3G955B171160157.5 1682.1700 90070001
1801890.25
1SMB5955BT3G64.60.25 0.251
1SMB5947BT3G
1SMB5956BT3G956B1902002101.9120080000.251
  1. ZENER IMPEDANCE (ZZ) DERIVATION Z ZT and Z ZK are measured by dividing the ac voltage drop across the device by the ac current applied. The specified limits are for I Z(ac) = 0.1 I Z(dc) with the ac frequency = 60 Hz.

*Include SZ-prefix devices where applicable.

Figure 1. Steady State Power Derating

Figure 1. Steady State Power Derating

Figure 3. Zener Voltage -To 12 Volts

Figure 5. V Z = 3.3 thru 10 Volts

1K

500

300

200

100

50

30

20

P , PEAK SURGE POWER (WATTS)

PK

10

, TEMPERATURE COEFFICIENT (mV/ C)

°

VZ

θ

10

10

100

50

30

20

10

5

3

2

1

0.5

0.3

0.2

0.1

0.1

200

100

70

50

30

20

0

0.2

0.3

0.5

1

RECTANGULAR

NONREPETITIVE

WAVEFORM

T J = 25

°

C PRIOR

TO INITIAL PULSE

2

3

5

10

20

30

50

100

PW, PULSE WIDTH (ms)

Figure 2. Maximum Surge Power

VZ @ I ZT

20

30

50

70

100

VZ , ZENER VOLTAGE (VOLTS)

Figure 4. Zener Voltage -14 To 200 Volts

10

20

30

40

50

60

70

80

VZ , ZENER VOLTAGE (VOLTS)

Figure 6. V Z = 12 thru 82 Volts

90

200

100

Figure 7. Effect of Zener Voltage

Figure 8. Effect of Zener Current

1SMB5914BT3G Absolute Maximum Ratings

RatingSymbolValueUnit
Maximum Steady State Power Dissipation@T L = 75 ° C Measured at Zero Lead Length Derate Above 75 ° C Thermal Resistance from Junction - to - LeadP D R q JL3.0 40 25W mW/ ° C ° C/W
Maximum Steady State Power Dissipation@T A = 25 ° C (Note ) Derate Above 25 ° C Thermal Resistance from Junction - to - AmbientP D R q JA550 4.4 226mW mW/ ° C ° C/W
Operating and Storage Temperature RangeT J , T stg- 65 to +150° C

Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected.

  1. FR -4 board, using recommended footprint.

*For additional information on our Pb -Free strategy and soldering details, please download the onsemi Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.

Variants on the same datasheet

These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.

Part NumberManufacturerPackage
1SMB5913BT3GonsemiSMB
1SMB5915BT3GonsemiSMB
1SMB5916BT3GonsemiSMB
1SMB5917BT3Gonsemi—

Other Diodes

  • CDSOT23-SM712 – Bourns Inc., Surface Mount TVS Diode
  • SS34HE – Vishay Intertechnology, Schottky Barrier Rectifier
  • BSD3A311V – Brightking, ESD Protection Diode
  • CH213K – WCH, Low Dropout Ideal Diode Chip
  • VMNN110CMS-TR – Stanley Electric, Infrared Emitting Diode
  • ESD5Z2.5T1G – onsemi, ESD Protection TVS Diode
  • PMEG4010CEJ – Nexperia, Schottky Barrier Rectifier
  • USBLC6-2SC6 – STMicroelectronics, ESD Protection Device

All Diodes datasheetsAll onsemi datasheets (337)

Data on this page is extracted from publicly available manufacturer datasheets using automated tools including AI. It may contain errors or omissions. Always verify specifications against the official manufacturer datasheet before making design or purchasing decisions. See our Terms of Service. Rights holders can submit a takedown request.

Ask your AI agent about the 1SMB5914BT3G

Connect SheetsData to Claude, Cursor, Codex or any MCP client and your agent reads this datasheet for you: pinout, limits, register maps and design checks, with the numbers taken from the PDF.

claude mcp add --transport http sheetsdata https://mcp.sheetsdata.com/mcp

Then ask: "Can the 1SMB5914BT3G run from my 12 V rail? Check it against the datasheet limits."

Create a free account $2 of usage every month, no card needed.