The onsemi 1SMA5941BT3G is a 1.5W surface-mount Zener voltage regulator diode with a nominal Zener voltage of 47V and a voltage tolerance of ±5%. It is part of the 1SMA59xxBT3G series and is intended for general-purpose voltage regulation, waveform clipping, and MOSFET gate protection applications. onsemi currently lists the part as Active.
At IZT = 8mA, the Zener voltage is specified from 44.65V to 49.35V, with a nominal value of 47V. Maximum Zener impedance ZZT is 67Ω, while maximum ZZK is 1000Ω at IZK = 0.25mA. Maximum reverse leakage current is 0.5µA at VR = 35.8V, and maximum DC Zener current is 32mA.
The series specifies a maximum forward voltage of 1.2V at IF = 200mA. Maximum DC power dissipation is 1.5W at TL = 75°C under the specified zero-lead-length condition, while the ambient-rated dissipation is 0.5W at TA = 25°C using onsemi’s minimum recommended PCB footprint. Operating and storage junction temperature range is -65°C to +150°C.
The 1SMA5941BT3G is supplied in an SMA-2 / Case 403D surface-mount package measuring approximately 2.60 × 5.10 × 1.00mm. It is MSL Level 1 rated and supplied on tape and reel with 5,000 devices per reel. The device is Pb-free and has a Class 3 HBM ESD rating greater than 16kV. The standard 1SMA5941BT3G is not the automotive-qualified version; onsemi identifies the corresponding SZ-prefix family for AEC-Q101 and PPAP-capable applications.
Key Features:
- Manufacturer: onsemi
- Part Number: 1SMA5941BT3G
- Series: 1SMA59xxBT3G
- Device Type: Zener Voltage Regulator Diode
- Nominal Zener Voltage: 47V
- Voltage Tolerance: ±5%
- Zener Voltage Range: 44.65V to 49.35V
- Test Current IZT: 8mA
- Maximum Zener Impedance ZZT: 67Ω
- Maximum ZZK: 1000Ω @ IZK = 0.25mA
- Maximum Reverse Leakage: 0.5µA @ 35.8V
- Maximum DC Zener Current: 32mA
- Maximum Forward Voltage: 1.2V @ 200mA
- Maximum Power Dissipation: 1.5W @ TL = 75°C
- Junction-to-Lead Thermal Resistance: 50°C/W
- Junction-to-Ambient Thermal Resistance: 250°C/W
- ESD Rating: HBM Class 3, >16kV
- Operating / Storage Temperature: -65°C to +150°C
- Package: SMA-2 / Case 403D
- Package Size: Approx. 2.60 × 5.10 × 1.00mm
- Mounting Type: Surface Mount
- MSL: Level 1
- Packaging: Tape & Reel
- Reel Quantity: 5,000 pcs
- Pb-Free: Yes
- Product Status: Active
- Automotive Qualification: SZ-prefix version required for AEC-Q101 / PPAP.
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