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1SMB5945BT3G This 1SMB5945BT3G is a 68V Zener diode rated for 3W power dissipation in a surface mount SMB package. It features ±5% tolerance and a maximum leakage current of 1µA at 51.7V.
Mfr Part #:

1SMB5945BT3G

Available from 3 distributors
Mfr Name: On Semiconductor
On Semiconductor
This 1SMB5945BT3G is a 68V Zener diode rated for 3W power dissipation in a surface mount SMB package. It features ±5% tolerance and a maximum leakage current of 1µA at 51.7V.
✓ Total Stock: 17,440 pcs
$ Price Range: $0.14 - $0.54

1SMB5945BT3G Available from 3 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Smaxon Electronics ✓
Non-Authorised Inventory information
10,000 pcs
On Request
10000 pcs On Request 1 On Request On Request 22+ On Request On Request
Optech Co.,Limited ✓
Non-Authorised Inventory information
6,020 pcs
On Request
6020 pcs On Request 1 On Request On Request On Request On Request On Request
Xingangxin ✓
Non-Authorised Inventory information
1,420 pcs
On Request
1420 pcs On Request 1 On Request On Request On Request On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

1SMB5945BT3G Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
AEC Qualified
Automotive Grade
Current
Impedance (Max) (Zzt)
Industrial Grade
Lead Style
Medical Grade
Military Grade
Mounting Type
Operating Temperature
Power
Storage Temperature
Supplier Device Package
Tape & Reel
Termination Style
Tolerance
Voltage
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1SMB5945BT3G Description

Short technical summary and product information.

The 1SMB5945BT3G is a 3 Watt plastic surface mount Zener voltage regulator diode from On Semiconductor, part of the 1SMB59xxBT3G series. It provides a nominal Zener voltage of 68V with a tolerance of ±5%.

 

Key electrical specifications include a maximum power dissipation of 3W at lead temperature 75°C (derating 40mW/°C above 75°C) and 550mW at ambient temperature 25°C on FR-4 board. The maximum Zener impedance is 120Ω, reverse leakage current is 1µA at 51.7V, and forward voltage is 1.5V at 200mA. The device is ESD rated Class 3 (>16kV) per Human Body Model and has a flammability rating of UL 94 V-0.

 

Housed in a DO-214AA (SMB) surface mount package with modified L-Bend leads, the diode is marked with a cathode band for polarity. It is designed for top side or bottom circuit board mounting and offers a flat handling surface for accurate placement. The operating temperature range is -65°C to 150°C. The device is Pb-Free per the datasheet.

1SMB5945BT3G Quick Information

Product Type: Zener Diode
Series: 1SMB59xxBT3G
Canonical Name: Zener Diode 68V 3W ±5% SMB Surface Mount
Subcategory: Single Zener Diode

1SMB5945BT3G Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected
Lead Free: Yes

1SMB5945BT3G Estimated Pricing

Qty Low High
1+ $0.54 $0.54
10+ $0.34 $0.34
100+ $0.21 $0.21
500+ $0.16 $0.16
1,000+ $0.14 $0.14
2,500+ $0.14 $0.14

Estimated market price range - modelled values for guidance only, not live distributor offers.

1SMB5945BT3G Features

  • Rated for 68V zener voltage regulation.
  • Power dissipation up to 3W at 75°C lead temperature.
  • Surface mount SMB package with modified L-Bend leads.
  • ESD rated Class 3 (>16kV) per HBM.
  • UL 94 V-0 flammability rated.

1SMB5945BT3G Applications

  • Used for voltage regulation in power supplies.
  • Ideal for overvoltage protection circuits.
  • Suitable for general purpose clamping applications.
  • Can be used in automotive electronics (AEC-Q101 versions available).

1SMB5945BT3G FAQs

7 frequently asked questions generated from this part’s specifications.
What is the zener voltage of the 1SMB5945BT3G?

The zener voltage is 68V with a tolerance of ±5%.

What is the power dissipation rating?

Maximum power dissipation is 3W at lead temperature 75°C, and 550mW at ambient temperature 25°C on FR-4 board.

What is the forward voltage of this diode?

The maximum forward voltage is 1.5V at a forward current of 200mA.

What package is the 1SMB5945BT3G available in?

It is available in the DO-214AA (SMB) surface mount package.

What is the operating temperature range?

The operating temperature range is -65°C to 150°C.

What is the ESD rating?

The device has an ESD rating of Class 3 (>16kV) per the Human Body Model.

Is this product RoHS compliant?

Per the datasheet, the device is Pb-Free and RoHS compliant (RoHS3).

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