The SMDJ8.0CA from Littelfuse is a bidirectional transient voltage suppression (TVS) diode from the SMDJ series, designed to protect sensitive electronics against voltage transients caused by lightning, switching events, and other surge conditions. Its surface-mount construction is suitable for I/O interfaces, power buses, telecommunications, computers, industrial equipment, and consumer electronics.
The device has an 8V reverse standoff voltage and a bidirectional configuration suitable for AC, bipolar, and polarity-independent protection nodes. At a 1mA test current, its specified breakdown-voltage range is 8.89V to 9.83V, corresponding to the 5% tolerance version of the SMDJ family.
Under the standard 10/1000μs surge waveform, the SMDJ8.0CA provides 3000W peak pulse power capability. Maximum peak pulse current is 220.6A, with a maximum clamping voltage of 13.6V under the specified test conditions.
Maximum reverse leakage current is 50μA at the 8V standoff voltage. Under the specified 8/20μs waveform, the datasheet also lists a maximum clamping voltage of 17.57V and a maximum peak pulse current of 1103A. Actual protection performance depends on the surge waveform, source impedance, PCB layout, and thermal conditions.
The SMDJ family uses a glass-passivated junction and low-dynamic-resistance construction for effective transient clamping. Littelfuse also specifies IEC 61000-4-2 ESD capability up to 30kV air discharge and 30kV contact discharge, along with a UL-recognized V-0 flammability-rated package compound.
Operating junction temperature ranges from −65°C to +150°C, while the storage-temperature range is −65°C to +175°C. Typical thermal resistance is 15°C/W from junction to lead and 75°C/W from junction to ambient under the specified test conditions.
The SMDJ8.0CA uses a DO-214AB surface-mount package. The standard SMDJ8.0CA ordering option is associated with TR13 tape-and-reel packaging, while SMDJ8.0CA-T7 is the TR07 version. The series is RoHS compliant and halogen-free.
Key Specifications
- Manufacturer: Littelfuse
- Manufacturer Part Number: SMDJ8.0CA
- Series: SMDJ
- Device Type: TVS Diode
- Polarity: Bidirectional
- Reverse Standoff Voltage VR: 8V
- Breakdown Voltage VBR: 8.89V to 9.83V
- Breakdown Test Current IT: 1mA
- Peak Pulse Power: 3000W
- Standard Surge Waveform: 10/1000μs
- Maximum Peak Pulse Current: 220.6A
- Maximum Clamping Voltage: 13.6V
- 8/20μs Maximum Clamping Voltage: 17.57V
- 8/20μs Maximum Peak Pulse Current: 1103A
- Maximum Reverse Leakage: 50μA at 8V
- VBR Temperature Coefficient: 0.064%/°C
- Operating Junction Temperature: −65°C to +150°C
- Storage Temperature: −65°C to +175°C
- Typical Junction-to-Lead Thermal Resistance: 15°C/W
- Typical Junction-to-Ambient Thermal Resistance: 75°C/W
- Junction Technology: Glass Passivated
- Package: DO-214AB
- Mounting Type: Surface Mount
- Standard Packaging: TR13 Tape and Reel
- Device Marking: DDR
- RoHS: Compliant
- Halogen-Free: Yes
- Agency Recognition: UL 497B
- Product Status: Active
Typical Applications
Suitable for protection of VCC power buses, I/O interfaces, industrial control electronics, telecommunications equipment, computers, consumer electronics, and other circuits exposed to lightning-induced surges, ESD, or transient overvoltage events. The normal maximum circuit voltage, surge waveform, peak current, and allowable clamping voltage should be verified when selecting the TVS device.
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