Overview
The SMAJ33A-TR, produced by STMicroelectronics, is a Transil™ TVS (Transient Voltage Suppressor) diode designed to protect sensitive equipment against electrostatic discharges and electrical overstress. This device complies with various international standards, including IEC 61000-4-2, IEC 61000-4-4, and MIL STD 883, method 3015. It is particularly suited for high-end equipment and Switch Mode Power Supplies (SMPS) where low leakage current and high junction temperature are critical for reliability and stability.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Peak Pulse Power Dissipation (10/1000 μs) | 400 | W |
| Peak Pulse Power Dissipation (8/20 μs) | 2.3 kW | kW |
| Stand-off Voltage | 33 V | V |
| Leakage Current at 25 °C | 0.2 μA | μA |
| Leakage Current at 85 °C | 1 μA | μA |
| Operating Junction Temperature Range | -55 to +150 °C | °C |
| Maximum Lead Temperature for Soldering | 260 °C | °C |
| Junction to Leads Thermal Resistance | 30 °C/W | °C/W |
| Junction to Ambient Thermal Resistance | 120 °C/W | °C/W |
| Package Type | SMA (JEDEC DO-214AC) | |
| Compliance Standards | IEC 61000-4-2, IEC 61000-4-4, MIL STD 883G, UL94 V0 |
Key Features
- Unidirectional and bidirectional types available
- Low leakage current: 0.2 μA at 25 °C and 1 μA at 85 °C
- High power capability: 400 W (10/1000 μs) and 2.3 kW (8/20 μs)
- Operating junction temperature up to 150 °C
- JEDEC registered package outline and IPC 7531 footprint
- Compliant with IEC 61000-4-2 level 4 (30 kV air and contact discharge), IEC 61000-4-4, and MIL STD 883G, method 3015-7 Class 3B
- Resin meets UL 94, V0 flammability rating
Applications
The SMAJ33A-TR is generally used in applications requiring protection against surges and electrostatic discharges, such as:
- High-end electronic equipment
- Switch Mode Power Supplies (SMPS)
- Sensitive electronic circuits in industrial, automotive, and consumer electronics
- Protection against electrical overstress and transient voltages
Q & A
- What is the peak pulse power dissipation of the SMAJ33A-TR? The peak pulse power dissipation is 400 W (10/1000 μs) and 2.3 kW (8/20 μs).
- What is the stand-off voltage of the SMAJ33A-TR? The stand-off voltage is 33 V.
- What are the leakage current values at different temperatures? The leakage current is 0.2 μA at 25 °C and 1 μA at 85 °C.
- What is the operating junction temperature range of the SMAJ33A-TR? The operating junction temperature range is -55 to +150 °C.
- What package type does the SMAJ33A-TR use? The SMAJ33A-TR is packaged in SMA (JEDEC DO-214AC).
- Is the SMAJ33A-TR compliant with any specific standards? Yes, it complies with IEC 61000-4-2, IEC 61000-4-4, MIL STD 883G, and UL94 V0.
- What is the maximum lead temperature for soldering? The maximum lead temperature for soldering is 260 °C.
- What are the thermal resistance values for the SMAJ33A-TR? The junction to leads thermal resistance is 30 °C/W, and the junction to ambient thermal resistance is 120 °C/W.
- Can the SMAJ33A-TR be used in high-temperature environments? Yes, it can operate up to a junction temperature of 150 °C.
- Is the SMAJ33A-TR suitable for high-end electronic equipment? Yes, it is particularly suited for high-end equipment and SMPS due to its low leakage current and high junction temperature capabilities.
