LL4148-GS08 - 100V 150mA Fast Switching Diode SOD-80 | Vishay
MPN: LL4148-GS08 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.18 | $0.18 |
| 10 | $0.16 | $1.60 |
| 100 | $0.11 | $11.00 |
| 500 | $0.08 | $40.00 |
| 1,000 | $0.06 | $60.00 |
| 2,500 | $0.05 | $125.00 |
LL4148-GS08 Overview
A switching diode is a two-terminal semiconductor device optimized for fast transitions between conduction and blocking states rather than for power rectification. Switching diodes belong to the broader signal diode category within discrete semiconductors and are characterized by short reverse recovery time (trr), low junction capacitance, and modest current handling. In a circuit hierarchy they sit alongside Zener diodes, Schottky diodes, and TVS devices, each tuned for different switching or voltage-handling roles. The LL4148-GS08 is AEC-Q101 qualified, extending its use into automotive-grade designs that require proven reliability under thermal and electrical stress.
Key features include 100V Vrrm maximum rating, 150mA If(AV) continuous forward current, 8ns reverse recovery time enabling high-frequency operation, 450mV typical forward voltage at low current, and a MiniMELF surface-mount package that provides a robust glass-bodied hermetic structure. The device also offers 2A IFSM peak forward surge capability for one-microsecond transients, a -65C to +175C operating junction temperature range, and RoHS-compliant lead-free termination finishes.
The LL4148-GS08 uses a silicon epitaxial planar PN junction with a guard ring that protects the die against electrostatic discharge events exceeding normal handling levels. This architecture balances fast switching speed with low leakage, making it suitable for logic-level interfacing, high-frequency rectification up to several hundred megahertz, and general-purpose signal routing. The MiniMELF package offers low parasitic inductance compared with smaller SOD-123 alternatives, which is advantageous in pulse and high-speed switching circuits.
Typical applications include general-purpose switching in industrial controls, automotive signal conditioning modules, high-frequency rectification in logic-level power paths, reverse-polarity protection, clamping and freewheeling functions, and analog signal demodulation. The combination of fast switching, AEC-Q101 automotive qualification, and the compact surface-mount MiniMELF package makes it a versatile workhorse for both commercial and automotive electronics.
When designing with the LL4148-GS08, respect the 450mW power dissipation limit and the 150mA continuous forward current rating. Confirm peak forward surge current does not exceed 2A for short transient pulses, and provide adequate PCB land pattern geometry to match the SOD-80 MiniMELF footprint. The cathode is identified by a black band on the glass body; orient accordingly to avoid reverse installation.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, including cross-brand equivalents, parametric comparison, and application guidance.
Drop-in alternatives for LL4148-GS08 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LL4148-GS18
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LL4448-GS08
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LL4148-GS08 Maximum Ratings & Electrical Characteristics
| Diode Type | Small Signal Fast Switching Diode |
| Package | SOD-80 (MiniMELF / LL-34) |
| Repetitive Peak Reverse Voltage (Vrrm) | 100 V |
| Reverse Voltage (DC) (Vr) | 75 V |
| Average Rectified Forward Current (If(AV)) | 150 mA |
| Forward Continuous Current (If) | 300 mA |
| Peak Forward Surge Current (Ifsm) | 2 A (tp = 1 us) |
| Forward Voltage (Vf) Max | 1 V at If = 100 mA |
| Reverse Leakage Current (Ir) | 25 nA at 20 V |
| Reverse Recovery Time (trr) Max | 8 ns |
| Power Dissipation (Ptot) | 500 mW |
| Operating Junction Temperature Range | -65 C to +175 C |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q101 qualified |
| RoHS Compliance | Compliant (2002/95/EC) |
| Reel Quantity (GS08) | 2,500 per 7-inch reel |
| Construction | Silicon epitaxial planar PN junction with ESD guard ring |
LL4148-GS08 Pin Configuration
| Pin 1 | Anode — Anode terminal (unmarked end of MiniMELF body) |
| Pin 2 | Cathode — Cathode terminal (black band marking on MiniMELF body) |
Typical Applications
LL4148-GS08 is suitable for 6 applications: High-Frequency Rectification in Logic Circuits, Reverse-Polarity Protection, Automotive Signal Conditioning, Clamping and Freewheeling Diode Functions, Analog Signal Demodulation and Detection, Logic-Level Interface Protection.
High-Frequency Rectification in Logic Circuits
The LL4148-GS08 fits high-frequency rectification in logic-level circuits thanks to its 8ns reverse recovery time and 100V Vrrm rating. Used as a freewheeling or clamping diode across relay coils, solenoids, and inductive loads in 5V to 48V signal conditioning paths, its 150mA If(AV) rating handles typical CMOS and TTL interface currents. The MiniMELF package keeps parasitic capacitance low compared with leaded alternatives, preserving signal edge fidelity at switching frequencies up to several hundred megahertz. AEC-Q101 qualification enables deployment in automotive body and chassis electronics where reliability under thermal stress is mandatory.
Recommended
Reverse-Polarity Protection
The LL4148-GS08 is well suited for low-current reverse-polarity protection in battery-powered and USB-powered devices. With 1V typical forward voltage drop at 100mA and 75V DC reverse voltage tolerance, it blocks reverse battery installation while minimizing voltage loss in the forward path. Its 500mW power dissipation and 150mA continuous current match the requirements of low-power sensor modules, IoT edge nodes, and portable consumer products. The surface-mount MiniMELF footprint supports compact PCB layouts where space is constrained and AEC-Q101 qualification extends use to automotive subsystems.
Recommended
Automotive Signal Conditioning
The LL4148-GS08 supports automotive signal conditioning modules requiring AEC-Q101 qualified switching diodes. Its 150mA forward current and 100V reverse rating accommodate CAN bus protection, sensor interface clamping, and BCM (body control module) logic-level switching. The -65C to +175C operating junction temperature range survives underhood and wheel-well thermal stress. The MiniMELF SOD-80 package provides a hermetic glass body with stable electrical characteristics across humidity and thermal cycling, critical for automotive reliability targets. Engineers typically pair this diode with TVS protection for comprehensive ESD and transient immunity.
Recommended
Clamping and Freewheeling Diode Functions
The LL4148-GS08 functions as a freewheeling (snubber) diode across relay coils, small motors, and solenoids where it suppresses back-EMF that otherwise damages driver transistors. With 8ns reverse recovery and 2A peak forward surge capability, the diode safely commutates inductive kickback in PWM-driven loads up to tens of kilohertz. Its 100V reverse voltage rating handles the inductive flyback voltages typical of 12V and 24V automotive and industrial systems. The MiniMELF package's low parasitic inductance is advantageous in switching applications where high dI/dt demands rapid diode turn-off.
Recommended
Analog Signal Demodulation and Detection
The LL4148-GS08 is appropriate for analog signal demodulation and envelope detection in low-frequency communication receivers and analog front ends. Its 8ns reverse recovery preserves signal integrity in AM demodulators, RF detector circuits, and sample-and-hold paths where diode switching speed affects bandwidth. With 100V Vrrm tolerance it tolerates wide input signal swings in instrumentation. Low reverse leakage of 25nA at 20V minimizes DC offset in precision rectifier topologies, while the MiniMELF package reduces parasitic capacitance that would otherwise limit high-frequency detector performance.
Recommended
Logic-Level Interface Protection
The LL4148-GS08 protects logic-level signal lines in industrial controllers, PLCs, and embedded computing platforms. With 75V DC reverse voltage and 150mA forward current, it clamps ESD and transient events on GPIO, UART, SPI, and I2C lines interfacing with field sensors and actuators. The 8ns reverse recovery maintains signal integrity at logic edges into tens of megahertz. AEC-Q101 qualification supports industrial and automotive deployments. Engineers often pair this diode with a series resistor or TVS to form a comprehensive protection network for harsh-environment I/O.
Recommended
Recommended Products Summary
Engineering reference data for LL4148-GS08 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LL4148-GS18 | LL4148 | LL4448-GS08 | LL4148 (onsemi) | LL4148 (Slkor) |
|---|---|---|---|---|---|---|
| Package | SOD-80 (MiniMELF) | SOD-80 (MiniMELF) - same | SOD-80 (MiniMELF) - same | SOD-80 (MiniMELF) - same | SOD-80 (MiniMELF) - same | SOD-80 (MiniMELF) - same |
| Brand | Vishay Intertechnology | Vishay Intertechnology | Vishay Intertechnology | Vishay Intertechnology | onsemi | Slkor Microelectronics |
| Repetitive Peak Reverse Voltage (Vrrm) | 100 V | 100 V | 100 V | 100 V | 100 V | 100 V |
| Average Forward Current (If(AV)) | 150 mA | 150 mA | 150 mA | 150 mA | 150 mA | 150 mA |
| Reverse Recovery Time (trr) Max | 8 ns | 8 ns | 8 ns | 8 ns | 8 ns | 8 ns |
| Forward Voltage (Vf) Max at 100 mA | 1 V | 1 V | 1 V | 1 V | 1 V | 1 V |
| Power Dissipation (Ptot) | 500 mW | 500 mW | 500 mW | 500 mW | 500 mW | 500 mW |
| Automotive Qualification (AEC-Q101) | Yes | Yes | Yes | Yes | Yes | Unknown |
Key Differentiators
- AEC-Q101 automotive qualification in MiniMELF package (vs BAS16 (SOT-23))
- Higher repetitive reverse voltage than SOT-23 competitors (vs BAS16 (SOT-23))
- Cross-brand second-source availability in identical package (vs LL4148 (onsemi))
Design Notes
The MiniMELF SOD-80 footprint requires rectangular SMD land pads approximately 1.6mm x 0.9mm each, spaced 3.5mm center-to-center. Confirm the land pattern matches IPC-7351 nominal MiniMELF dimensions before committing to layout, since SOD-80 differs from the smaller SOD-123 and LL-41 packages. Maintain symmetric pad geometry to ensure balanced solder fillet formation and reliable reflow.
Estimated: at 150mA continuous forward current and 1V forward voltage, the LL4148-GS08 dissipates approximately 0.15W in the conducting state. The MiniMELF package has a thermal resistance of roughly 300 C/W junction-to-ambient, producing an estimated 45 C temperature increase above ambient at full rated current. For higher dissipation, derate to 70% of rated current or parallel multiple devices to stay within the 500mW absolute maximum power rating.
Do not confuse the LL4148-GS08 (Vishay SOD-80, 100V) with the LL43 series Schottky MiniMELF (which has a different cathode marking and forward voltage curve). Verify the black cathode band orientation before soldering, since reversed installation causes functional failure in DC circuits. Also confirm peak forward surge current does not exceed 2A for transient pulses beyond the 1us specification, where derating accelerates.
Compliance Information
RoHS compliant per Vishay datasheet (2002/95/EC). AEC-Q101 qualified for automotive. Lead-free finish. Halogen-free status not explicitly stated in verified web data.
