Model Information: SMBJ40A

Product Overview

Manufacturer: Littelfuse, Inc.
Series: SMBJ
Model: SMBJ40A
Type: Surface Mount TVS Diode
Applications: Protection of I/O Interfaces, VCC bus, and other vulnerable circuits in Telecom, Computer, Industrial, and Consumer electronics.

Electrical Specifications

• Reverse Standoff Voltage (VR): 40.0 V
• Breakdown Voltage (VBR): 44.4 V (Min) to 49.1 V (Max)
• Test Current (IT): 1 mA
• Maximum Clamping Voltage (VC) @ Ipp: 64.5 V
• Maximum Peak Pulse Current (Ipp): 10 A
• Maximum Reverse Leakage (IR) @ VR: 0.099 µA
• Maximum Temperature Coefficient of VBR: 0.099 %/°C
• Agency Approval: UL Recognized
• Marking: KE AE

Maximum Ratings and Thermal Characteristics (TA=25°C unless otherwise noted)

• Peak Pulse Power Dissipation (PPPM): 600 W (Single Die Parts)
• Power Dissipation on Infinite Heat Sink (PD): 5.0 W
• Peak Forward Surge Current (IFSM): 100 A
• Maximum Instantaneous Forward Voltage (VF) at 50A: 3.5 V (Single Die Parts)
• Operating Temperature Range (TJ): -65°C to 150°C
• Storage Temperature Range (TSTG): -65°C to 175°C
• Typical Thermal Resistance Junction to Lead (RƟJL): 20 °C/W
• Typical Thermal Resistance Junction to Ambient (RƟJA): 100 °C/W

Physical Specifications

• Weight: 0.003 ounce, 0.093 grams
• Case: JEDEC DO214AA. Molded plastic body over glass passivated junction
• Polarity: Color band denotes cathode (except Bidirectional)
• Terminal: Matte Tin-plated leads, Solderable per JESD22-B102

Soldering Parameters

• Preheat Temperature (Ts(min)): 150°C
• Preheat Temperature (Ts(max)): 200°C
• Preheat Time (ts): 60 – 120 secs
• Average Ramp Up Rate (TL to TP): 3°C/second max
• Reflow Temperature (TL): 217°C
• Reflow Time (tL): 60 – 150 seconds
• Peak Temperature (TP): 260±5 °C
• Time within 5°C of Actual Peak Temperature (tp): 30 seconds max
• Ramp-Down Rate: 6°C/second max
• Time 25°C to Peak Temperature (TP): 8 minutes Max

Dimensions (in mm)

• A: 1.930 to 2.200
• B: 4.060 to 4.750
• C: 3.300 to 3.940
• D: 1.990 to 2.610
• E: 0.760 to 1.520
• F: 0.203
• G: 5.210 to 5.590
• H: 0.152 to 0.305
• I: 2.260
• J: 2.160
• K: 2.740
• L: 2.160

Environmental Specifications

• High Temperature Storage: JESD22-A103
• HTRB: JESD22-A108
• Temperature Cycling: JESD22-A104
• Moisture Sensitivity Level (MSL): JEDEC-J-STD-020, Level 1
• H3TRB: JESD22-A101
• RSH: JESD22-A111

Part Numbering System

• VR Voltage: 40.0 V
• Bi-Directional: No
• 5% VBR Voltage Tolerance: Yes
• Series: SMBJ
• Packaging: DO-214AA
• Quantity: 3000
• Packaging Option: Tape & Reel
• Packaging Specification: 12mm tape/13” reel, EIA STD RS-481

Part Marking System

• Marking Code: KE AE
• Trace Code: Y: Year Code, M: Month Code, XXX: Lot Code
• Littelfuse Logo: Present
• Cathode Band: For uni-directional products only