LS4148/LS4448/LS914B 500mW High Speed SMD Switching Diode

Product catalog summary

Overview: The document provides technical specifications for the LS4148, LS4448, and LS914B high-speed SMD switching diodes. These are small signal diodes designed for fast switching applications with a reverse recovery time of less than 4.0 nanoseconds.

Features: The diodes are surface-mounted devices with a moisture sensitivity level of 1. They feature a matte tin lead finish with a nickel underplate and are both Pb-free and RoHS compliant.

Mechanical Data: The diodes are housed in a QUADRO Mini-MELF package (JEDEC DO-213) with dimensions ranging from 3.30 to 3.70 mm in length and 0.130 to 0.146 inches in width. They are capable of withstanding high-temperature soldering at 270°C for 10 seconds.

Electrical Characteristics: The diodes have a forward voltage of 0.62 to 0.72 V and a reverse breakdown voltage of 75 to 100 V. The reverse leakage current is specified at 5 to 100 μA, and the junction capacitance is 4.0 pF. The maximum power dissipation is 500 mW.

Maximum Ratings: The diodes can operate within a junction and storage temperature range of -65°C to +200°C. The mean forward current is 150 mA, with a non-repetitive peak forward current of 450 mA. The thermal resistance from junction to ambient is 300°C/W.

Performance Curves: The document includes several performance curves:

Figure 1: Typical Forward Characteristics showing the relationship between instantaneous forward voltage and current.
Figure 2: Reverse Current vs. Reverse Voltage illustrating the reverse current behavior at different voltages.
Figure 3: Admissible Power Dissipation Curve indicating power dissipation limits across temperatures.
Figure 4: Typical Junction Capacitance as a function of reverse voltage.
Figure 5: Forward Resistance vs. Forward Current demonstrating dynamic forward resistance changes with current.

Packaging: The diodes are available in reels of 2.5Kpcs for 7-inch reels and 10Kpcs for 13-inch reels.

Catalog excerpts

LS4148/LS4448/LS914B 500mW High Speed SMD Switching Diode-1

LS4148/LS4448/LS914B 500mW High Speed SMD Switching Diode Small Signal Diode ..Fast switching device(Trr<4.0nS) ..Surface device type mounting ..Moisture sensitivity level 1 ..Matte Tin(Sn) lead finish with Nickel(Ni) underplate ..Pb free version and RoHS compliant Min Max Min Max ..Case : QUADRO Mini-MELF Package (JEDEC DO-213) 3.30 3.70 0.130 0.146 ..High temperature soldering guaranteed : 270°C/10s 1.40 1.60 0.055 0.063 0.25 0.40 0.010 0.016 1.25 1.40 0.049 0.055 2.5Kpcs / 7" Reel Maximum Ratings Electrical Characteristics IR=100uA IR=5uA Forward Voltage LS4448, LS914B IF=5.0mA LS4148 IF=10.0mA LS4448, LS914B IF=100.0mA VR=20V VR=75V Junction Capacitance VR=0, f=1.0MHz Reverse Recovery Time (Note 2) Notes:1. Valid provided that electrodes are kept at ambient temperature Notes:2. Reverse Recovery Test Conditions: IF=IR=10mA, RL=100Ù, IRR=1mA LSxxxx L1 LSxxxx L0 Package QUADRO Mini-MELF QUADRO Mini-MELF Packing 10Kpcs / 13" Reel mW Rating at 25°C ambient temperature unless otherwise specified. Type Number Units PD Part No. 0.071 Ordering Information Junction and Storage Temperature Range Mean Forward Current IFM IO TJ, TSTG RèJA Non-Repetitive Peak Forward Current Thermal Resistance (Junction to Ambient) (Note 1) -65 to + 200 °C 450 150 300 °C/W V V mA mA ìA CJ Type Number Symbol 75 100 Reverse Breakdown Voltage 0.72 Trr ns 1.0 1.0 25 - 4.0 - Units - Reverse Leakage Current V VF IR V(BR) - - - Min Max nA V pF 0.62 - - 5.0 4.0 Symbol ..Weight : 29 ± 2.5 mg 75 D E 1.80 Repetitive Peak Reverse Voltage VRRM 500 100 Power Dissipation Non-Repetitive Peak Reverse Voltage Maximum Ratings and Electrical Characteristics Features Mechanical Data Unit (mm) Unit (inch) Dimensions A B C QUADRO Mini-MELF (LS34) ..Polarity : Indicated by cathode band Peak Forward Surge Current IFSM 2 A HERMETICALLY SEALED GLASS ..All External Surfaces are Corrosion Resistant and Leads are Readily Solderable Value VRSM C B A D E Version : C09

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