MCL4148-TR3 - 100V 150mA Fast Switching MicroMELF Diode | Vishay
Teilenummer: MCL4148-TR3 ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $0.2 | $0,20 |
| 10 | $0.18 | $1,80 |
| 100 | $0.14 | $14,00 |
| 500 | $0.11 | $55,00 |
| 1.000 | $0.09 | $90,00 |
| 10.000 | $0.07 | $700,00 |
MCL4148-TR3 Übersicht
A small-signal switching diode is a two-terminal semiconductor device optimized for fast turn-on and turn-off transitions rather than power rectification. Switching diodes sit in the hierarchy: diode -> small-signal diode -> switching diode -> discrete semiconductor, and they serve as the elementary building blocks of logic-level signal processing, clamp circuits, and high-frequency rectifiers. The MCL4148-TR3 occupies the same electrical niche as the through-hole 1N4148 and the surface-mount LL4148, offering equivalent switching speed and 100 V blocking voltage with the added benefit of an SMT-friendly cylindrical glass envelope.
Key features include 4 ns reverse recovery time, 1.0 V maximum forward voltage at 10 mA, 100 V repetitive peak reverse voltage, 75 V RMS reverse voltage, 150 mA average rectified forward current, 450 mA peak forward surge current, and 500 mW power dissipation. The hermetically sealed MicroMELF glass package provides mechanical robustness and long-term reliability in demanding environments, while AEC-Q101 qualification on the base MCL4148 family makes the part suitable for automotive-grade applications when paired with appropriate lot-level certification documentation.
The MCL4148-TR3 uses silicon epitaxial planar construction with a precision-controlled junction that minimizes stored charge and enables the sub-5 ns reverse recovery performance. Compared with rectifier diodes optimized for 50/60 Hz line rectification, switching diodes prioritize low charge storage and fast transitions, making them suitable for high-frequency signal processing well into the hundreds-of-megahertz range. The MicroMELF package's cylindrical body has a low parasitic inductance footprint and supports automated pick-and-place assembly with tape-and-reel packaging.
Typical applications include high-frequency signal rectification, logic-level clamping, freewheeling diodes for inductor demagnetization, steering diodes in matrix-switch circuits, signal demodulation in RF and telecom front ends, and reverse-polarity protection at low current levels. The MCL4148-TR3 is also commonly used as a general-purpose switching element in instrumentation, test equipment, and consumer electronics where a compact SMT alternative to the LL4148 or 1N4148 is required.
When designing with this device, observe the 500 mW power dissipation limit and provide adequate PCB copper area for thermal spreading. Use short lead-bend-free traces and place bypass capacitors close to switching nodes. For high-frequency applications above 100 MHz, account for junction capacitance (~4 pF typical) when computing load impedance, and ensure peak inverse voltage never exceeds the 100 V repetitive rating or the 100 V non-repetitive surge rating.
Drop-in-Alternativen für MCL4148-TR3 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
MCL4148-TR
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MCL4448-TR3
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MCL914-TR3
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
LL4148
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
CDLL4148
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
1N914
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MCL4148-TR3 Grenzwerte & elektrische Eigenschaften
| Diode Type | Small Signal Fast Switching Diode |
| Configuration | Single, unidirectional |
| Technology | Silicon Epitaxial Planar |
| Gehäuse | MicroMELF (MiniMELF / DO-213AC / SOD-80) |
| Repetitive Peak Reverse Voltage (Vrrm) | 100 V |
| RMS Reverse Voltage (Vr(RMS)) | 75 V |
| Average Rectified Forward Current (If(AV)) | 150 mA |
| Continuous Forward Current (If) | 350 mA |
| Non-Repetitive Peak Forward Surge Current (Ifsm) | 2.0 A (tp = 1 s, Tj = 25 C) |
| Forward Voltage (Vf) Max | 1.0 V at If = 10 mA |
| Reverse Recovery Time (trr) Max | 4 ns |
| Power Dissipation (Pd) | 500 mW |
| Betriebs-Sperrschichttemperaturbereich | -65 C to +175 C |
| Montageart | Surface Mount |
| RoHS-Status | Compliant |
| Automotive Grade (AEC-Q101) | Qualified (base MCL4148 family) |
| Electrical Equivalence | Equivalent to 1N4148 and 1N4448 |
| Packaging | Tape & Reel (TR3 = 10,000 pcs/reel) |
MCL4148-TR3 Pin-Konfiguration
| Pin 1 | Anode (A) — Anode terminal - forward current flows into this pin |
| Pin 2 | Cathode (K) — Cathode terminal - marked by dark band on glass body; reverse blocking occurs here |
Typische Anwendungen
MCL4148-TR3 ist geeignet für 7 Anwendungs: High-Frequency Signal Rectification, Logic-Level Clamping and Protection, Freewheeling Diode for Inductor Demagnetization, Steering Diode in Matrix-Switch Circuits, Reverse-Polarity Protection at Low Current, Signal Demodulation in RF Front Ends, Automotive Sensor and ECU Signal Conditioning.
High-Frequency Signal Rectification
The MCL4148-TR3's 4 ns reverse recovery time and 100 V repetitive peak reverse voltage make it ideal for high-frequency signal rectification in telecom, RF front-end, and instrumentation designs. Its low stored charge and fast switching allow operation well into the hundreds-of-megahertz range, where slower rectifier diodes would introduce unacceptable switching loss. Placed at the output of a high-frequency signal path with a series resistor and shunt filter capacitor, the MCL4148-TR3 delivers clean DC recovery of modulated signals without adding significant distortion. The MicroMELF package's low parasitic inductance footprint minimizes ringing at VHF, making it a preferred choice versus larger SMA/SMB rectifiers for signal-level applications.
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Logic-Level Clamping and Protection
The MCL4148-TR3 is widely deployed as a clamp diode to protect logic-level inputs and MOSFET gates from transient overvoltage events. Its 100 V blocking capability handles inductive kickback from relay coils and small motors, while the 4 ns recovery time ensures clean clamping without latch-up. In a typical gate-drive protection circuit, two MCL4148-TR3 diodes back-to-back across the gate-source path of a low-side MOSFET clamp dv/dt-induced overshoot to safe levels within nanoseconds. The MicroMELF glass package supports dense PCB layouts common in motor-control and gate-driver boards, where multiple clamping channels must fit in limited board area.
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Freewheeling Diode for Inductor Demagnetization
In switching regulator and relay driver circuits, the MCL4148-TR3 serves as a freewheeling diode that provides a current path when an inductor switches off, protecting transistors from reverse EMF spikes. Its 150 mA average current rating suits small-signal relay coils and signal-level inductors, while the 100 V reverse voltage rating covers the back-EMF of 24 V and 48 V coil circuits. The 4 ns reverse recovery ensures the diode is fully blocking by the time the next switching cycle begins, eliminating cross-conduction loss. Designers typically place the MCL4148-TR3 in anti-parallel with the inductor, with the cathode toward the positive supply rail.
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Steering Diode in Matrix-Switch Circuits
The MCL4148-TR3 is used as a steering diode in analog matrix switches, signal-routing multiplexers, and OR-ing diode arrays where multiple signal paths converge on a common output. Its 4 ns recovery and 100 V blocking ensure that high-frequency signals route cleanly without cross-talk between channels, while the 150 mA forward current rating handles typical signal-level loads. The compact MicroMELF package allows high-density routing matrix construction on small PCBs, with multiple MCL4148-TR3 devices fitting into the area of a single SO-8 IC. The hermetically sealed glass package provides long-term stability in industrial matrix-switch installations.
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Reverse-Polarity Protection at Low Current
A single MCL4148-TR3 placed in series with the supply rail provides reverse-polarity protection for low-current loads up to 150 mA. With a 1.0 V forward voltage drop, the MCL4148-TR3 dissipates only 150 mW at full rated current, making it more efficient than a P-channel MOSFET solution for very-low-power designs. The 100 V reverse blocking protects downstream 3.3 V and 5 V regulators from reverse-battery events up to 100 V, well beyond typical automotive load-dump transients. Designers should account for the 1 V drop when computing regulator headroom, especially for 3.3 V LDO applications fed from a 5 V rail.
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Signal Demodulation in RF Front Ends
In AM demodulators, RF envelope detectors, and signal-conditioning front ends, the MCL4148-TR3 serves as a low-loss detector diode for weak RF signals. Its low junction capacitance (~4 pF typical) and fast switching preserve the integrity of demodulated envelopes above 100 MHz, while the 100 V reverse rating handles AGC rectified control voltages. The MicroMELF package's small footprint supports dense RF layouts where multiple detector channels must fit alongside filters and amplifiers. Compared with Schottky detectors, the MCL4148-TR3 offers higher reverse breakdown at lower cost, though at the expense of higher forward drop and slightly higher noise figure.
Empfohlen
Automotive Sensor and ECU Signal Conditioning
The MCL4148-TR3's AEC-Q101 qualification (inherited from the base MCL4148 family) and 100 V reverse blocking make it suitable for automotive sensor signal conditioning, ECU input protection, and body-electronics modules. It clamps inductive transients from solenoids and relays in 12 V and 24 V automotive systems, while its 4 ns recovery time handles high-speed CAN and LIN bus protection networks. The MicroMELF glass package withstands automotive underhood and cabin thermal-cycling environments better than plastic-encapsulated equivalents. Designers should review lot-level automotive qualification certificates with the Vishay datasheet when the application is mission-critical.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für MCL4148-TR3 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | MCL4148-TR | MCL4448-TR3 | MCL914-TR3 | LL4148 | CDLL4148 | 1N914 |
|---|---|---|---|---|---|---|---|
| Brand | Vishay Intertechnology | Vishay Intertechnology | Vishay Intertechnology | Vishay Intertechnology | Vishay Intertechnology | Microchip Technology | Microsemi |
| Package | MicroMELF (DO-213AC) | MicroMELF (DO-213AC) - same | MicroMELF (DO-213AC) - same | MicroMELF (DO-213AC) - same | MiniMELF (SOD-80/DO-213AA) - same land pattern | MiniMELF (SOD-80/DO-213AA) - same land pattern | MiniMELF/DO-35 - same land pattern |
| Repetitive Peak Reverse Voltage (Vrrm) | 100 V | 100 V | 100 V | 100 V | 100 V | 100 V | 100 V |
| Average Rectified Forward Current (If(AV)) | 150 mA | 150 mA | 150 mA | 75 mA (-50%) | 150 mA | 150 mA | 75 mA (-50%) |
| Reverse Recovery Time (trr) Max | 4 ns | 4 ns | 4 ns | 4 ns | 4 ns | 5 ns (+25%) | 4 ns |
| Forward Voltage (Vf) Max at 10 mA | 1.0 V | 1.0 V | 1.0 V | 1.0 V | 1.0 V | 1.0 V | 1.0 V |
| Power Dissipation (Pd) | 500 mW | 500 mW | 500 mW | 200 mW (-60%) | 500 mW | 500 mW | 500 mW |
| Automotive Grade (AEC-Q101) | Yes (qualified) | Yes (qualified) | Yes (qualified) | Yes (qualified) | Yes (qualified) | Yes (qualified) | No (MIL-PRF-19500 only) |
| Unit Price (qty 1, as of 2026-10-09) | $0.20 | $0.20 | $0.22 | $0.18 | $0.15 | $0.45 | $0.25 |
Wichtigste Unterscheidungsmerkmale
- Higher reel quantity on TR3 suffix reduces per-unit cost in volume assembly (vs. MCL4148-TR)
- Lower reverse leakage current optimized for detector/sample-and-hold circuits (vs. MCL4448-TR3)
- Lower forward current rating for signal-level applications (vs. MCL914-TR3)
Designhinweise
Estimated: at If(AV) = 150 mA and Vf = 1.0 V, steady-state power dissipation is 150 mW, well within the 500 mW rating of the MicroMELF package. At peak surge Ifsm = 2.0 A for tp < 1 s, peak dissipation reaches ~2 W but average over the surge window remains within thermal limits. The MicroMELF glass package has a junction-to-ambient thermal resistance (theta_JA) of approximately 300 C/W on a minimal PCB footprint; provide at least 100 mm^2 of copper land area at each terminal for sustained 150 mA operation. Derate linearly above 25 C ambient per the Vishay MCL4148 datasheet derating curve.
The MicroMELF (DO-213AC) package requires MiniMELF / SOD-80 land pads - typically 1.6 mm x 1.6 mm with 0.6 mm gap. Place the diode with the cathode band aligned to the silkscreen mark and ensure the polarity matches the schematic symbol. Use non-solder-mask-defined (NSMD) pads for better solder-joint reliability, and add small thermal reliefs (2 spokes) to balance solderability and thermal mass. Avoid placing the MicroMELF body across high-speed signal traces, as the cylindrical glass body can introduce small parasitic discontinuities at VHF frequencies above 200 MHz.
Do not exceed Vrrm = 100 V; in 24 V industrial systems with transients, add a TVS or zener clamp upstream. The MCL4148-TR3 is a small-signal device and is NOT suitable for line-frequency rectification at 50/60 Hz where the 150 mA If(AV) rating would be exceeded - use a rectifier diode (e.g., 1N400x) instead. When using the diode as a freewheel across an inductor, ensure peak inverse voltage never exceeds 100 V during worst-case switching transients including transformer ringing. Reverse-leakage current at high temperature (e.g., 25 C -> 100 C) increases by approximately 10x-50x; derate accordingly for hot environments.
Junction capacitance of the MCL4148-TR3 is approximately 4 pF at 0 V bias and decreases with reverse voltage. At signal frequencies above 100 MHz, this capacitance shunts the diode's reverse-bias node to ground, reducing rectification efficiency. For envelope-detection and small-signal demodulation above 100 MHz, account for capacitive loading in the matching network or consider a lower-capacitance Schottky alternative. The 4 ns reverse recovery time itself does NOT limit VHF operation; the dominant limitation is junction capacitance rather than trr.
Compliance-Informationen
RoHS compliant per Vishay product page. AEC-Q101 qualified (automotive variant of AEC-Q100 standard) on the base MCL4148 family. Lead-free (Pb-free) and halogen-free MicroMELF glass package per Vishay environmental compliance data.
