1N4148W-TP-HF - 100V 150mA Fast Switching Diode SOD-123 | MCC
MPN: 1N4148W-TP-HF ✓ Hoạt động1N4148W-TP-HF Tóm tắt
A small-signal switching diode is a two-terminal semiconductor device optimized for rapid transition between conducting and blocking states. The category sits within the broader hierarchy of discrete semiconductors -> diodes -> rectifier/switching diodes. Unlike power rectifiers, small-signal switching diodes trade current handling for ultra-fast switching, low junction capacitance, and sub-nanosecond recovery, making them the workhorse of analog signal processing, digital logic interfaces, and protection networks.
Key specifications include a repetitive peak reverse voltage (Vrrm) of 100 V, an average rectified forward current (If(AV)) of 150 mA, a non-repetitive peak forward surge current (Ifsm) of 4.0 A for an 8.3 ms half-sine pulse, and a total power dissipation of 400 mW. The diode exhibits a typical junction capacitance of 4.0 pF at 0 V and a maximum reverse leakage current of 1.0 µA at 75 V, ensuring minimal loading in high-impedance circuits and clean switching behavior in pulse and clamp topologies.
Architecturally, the 1N4148W-TP-HF uses a planar silicon epitaxial junction construction. The "HF" suffix denotes a Halogen-Free finish, supporting lead-free reflow profiles and RoHS-compliant assembly. The SOD-123 package provides a low thermal resistance footprint suitable for handheld, USB-powered, and IoT-class designs where every square millimeter of board real estate matters.
Typical applications include high-speed switching circuits, logic gate steering, analog signal clamping, freewheeling protection for small inductors, and reverse-polarity protection on low-current rails. It is also commonly used in voltage doublers, ring modulators, sample-and-hold circuits, and as a general-purpose flyback diode.
When designing with the 1N4148W-TP-HF, observe the 400 mW power dissipation limit. For continuous 150 mA conduction at 1 V forward drop, derate linearly above 25 °C ambient. Use a 0603 or larger copper pad to spread heat. Verify that pulse operation stays within the Ifsm rating of 4.0 A for transient surges.
Bộ thay thế dễ dàng lắp đặt cho 1N4148W-TP-HF — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với 1N4148W-TP-HF (cùng hình factor và footprint) — khác nhau ở Diode Type, RoHS Status.
1N4148W-TP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →1N4148WX-TP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
1N4148W-7-F
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
1N4148W-E3-08
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
1N4148W
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
BAS16
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
1N4148W-TP-HF Tỷ lệ tối đa & tính chất điện
| Manufacturer | Micro Commercial Components (MCC) |
| Diode Type | Small Signal Switching Diode |
| Hộp | SOD-123 |
| Kiểu lắp đặt | Surface Mount |
| Repetitive Peak Reverse Voltage (Vrrm) | 100 V |
| Average Rectified Forward Current (If(AV)) | 150 mA |
| Non-Repetitive Peak Forward Surge Current (Ifsm) | 4.0 A (8.3 ms half-sine) |
| Forward Voltage (Vf) Max | 1.25 V at 150 mA |
| Reverse Recovery Time (trr) Max | 4 ns |
| Reverse Leakage Current (Ir) Max | 1.0 µA at 75 V |
| Total Power Dissipation (Pd) | 400 mW |
| Junction Capacitance (Cj) | 4.0 pF at 0 V, 1 MHz |
| Khoảng nhiệt độ hoạt động | -65 °C to +150 °C |
| Đông trùng haogen | Yes (HF suffix) |
| Trạng thái RoHS | Compliant |
Cấu hình chân 1N4148W-TP-HF
| Chân 1 | A (Anode) — Anode terminal; positive side of the diode |
| Chân 2 | K (Cathode) — Cathode terminal; marked with colored band on package |
Ứng dụng tiêu biểu
1N4148W-TP-HF phù hợp cho 7 Áp dụngs: Logic-Level Signal Steering and OR-ing, Flyback and Freewheeling Protection, Reverse-Polarity Protection, Analog Signal Clamping and Protection, High-Frequency Rectification in Detector Circuits, Voltage Multiplier and Charge Pump Stages, Sample-and-Hold and Switching Multiplexer Circuits.
Logic-Level Signal Steering and OR-ing
The 1N4148W-TP-HF is widely used to steer logic-level signals between two or more sources, such as combining multiple power-good outputs or implementing diode-OR redundancy in low-voltage digital rails. Its 4 ns reverse recovery time ensures the diode turns off fast enough to prevent logic contention in high-speed data paths, and the 100 V Vrrm provides ample margin for transients on 3.3 V or 5 V logic buses. With 150 mA continuous current capability, it can source typical logic fan-out loads without approaching its rating. The SOD-123 footprint integrates easily into dense digital designs where through-hole 1N4148 parts would consume excessive board area. Designers typically use two 1N4148W-TP-HF diodes in a diode-OR configuration to combine redundant supply rails with minimal voltage drop (~0.7 V per diode at low current).
Được đề xuất
Flyback and Freewheeling Protection
The 1N4148W-TP-HF is a textbook choice for flyback protection across small inductors such as relay coils, small solenoids, and low-current motor windings. When the driving transistor switches off, the inductor's collapsing magnetic field generates a high-voltage reverse spike that could otherwise destroy the switching device; placing the 1N4148W-TP-HF in reverse-bias across the inductor safely clamps this spike. Its 4 ns trr is more than sufficient for switching frequencies up to several hundred kHz, and the 100 V reverse rating comfortably handles the L*di/dt spikes produced by small signal inductors. The 150 mA continuous rating suits relay coils under 50 mA steady-state. For larger inductive loads, the 4.0 A Ifsm surge rating handles the initial kickback for 8.3 ms pulses typical of relay de-energization events.
Được đề xuất
Reverse-Polarity Protection
The 1N4148W-TP-HF delivers reliable reverse-polarity protection on low-current power rails up to 150 mA continuous. Placed in series with the positive input, the diode blocks reverse battery or supply-miswire events that would otherwise damage downstream circuitry. At 150 mA, the forward drop is approximately 1.0 V, which is acceptable for most 5 V or higher rails but may require budgeting for a small efficiency loss on 3.3 V systems. The 100 V reverse rating far exceeds typical battery voltages, providing robust protection against supply transients. The SOD-123 package minimizes the PCB footprint compared to the through-hole DO-35 1N4148. Designers often use a P-channel MOSFET for higher-current rails but the 1N4148W-TP-HF remains the lowest-cost option for sub-150 mA applications where the 1 V drop is acceptable.
Được đề xuất
Analog Signal Clamping and Protection
In analog signal paths, the 1N4148W-TP-HF provides hard clamping to protect downstream op-amps, ADCs, and microcontroller inputs from voltage transients. Two diodes arranged anti-parallel between the signal line and the supply rails form a bidirectional clamp that limits excursion to within one diode drop of either rail. The 4 ns recovery ensures the diode disengages cleanly when the transient passes, avoiding signal distortion. With 4 pF typical capacitance, the part adds minimal loading to high-impedance nodes above 10 MHz. The 100 V Vrrm allows the diode to survive ESD and surge events far beyond normal signal levels, providing a robust front-end for instrumentation and audio inputs in industrial and test equipment.
Được đề xuất
High-Frequency Rectification in Detector Circuits
The 1N4148W-TP-HF is widely used as the rectifying element in RF detector, demodulator, and envelope-detector circuits operating from a few MHz up to several hundred MHz. Its 4 ns reverse recovery and 4 pF junction capacitance are well-matched to demodulating AM and ASK-modulated signals in receiver front-ends, RFID tag circuits, and RF-ID badge readers. Compared to Schottky detectors, the 1N4148W-TP-HF offers higher reverse breakdown voltage (100 V vs 20-40 V typical), which is useful when the detector must tolerate large RF input swings without breakdown. The SOD-123 surface-mount package is mandatory in modern wireless designs where through-hole components are not an option.
Được đề xuất
Voltage Multiplier and Charge Pump Stages
The 1N4148W-TP-HF is a classic building block in discrete voltage multipliers including Villard cascades, Greinacher doublers, and Cockcroft-Walton multiplier ladders used in low-power high-voltage generators. Its 4 ns reverse recovery allows operation at pump frequencies up to several hundred kHz, and the 100 V Vrrm enables stacking multiple stages to reach hundreds or thousands of volts for bias supplies, photomultiplier tubes, or small ion generators. The 150 mA current rating limits use to low-power applications such as bias tees, high-voltage probe supplies, or trigger circuits. The SOD-123 package permits compact cascade layouts on a single PCB. Designers commonly use 1N4148W-TP-HF stages to derive auxiliary high-voltage rails from a low-voltage oscillator without the cost of a dedicated high-voltage transformer.
Được đề xuất
Sample-and-Hold and Switching Multiplexer Circuits
In sample-and-hold circuits and switching multiplexers, the 1N4148W-TP-HF acts as a fast switch that connects or isolates a storage capacitor from the signal source. Its 4 ns turn-off time minimizes aperture uncertainty and pedestal error, which are critical in precision data-acquisition systems. The 100 V reverse rating is well above typical 5 V or 12 V analog rails, and the 4 pF capacitance adds negligible charge injection for hold-capacitor values above 100 pF. The SOD-123 footprint suits high-density multiplexer ICs and discrete switch arrays on instrumentation front-ends. The 1N4148W-TP-HF is often paired with low-leakage hold capacitors (such as polypropylene or NP0 ceramic) to build simple track-and-hold stages for audio, instrumentation, and servo-loop applications.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho 1N4148W-TP-HF — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 1N4148W-TP | 1N4148WX-TP | 1N4148W-7-F | 1N4148W-E3-08 | 1N4148W | BAS16 |
|---|---|---|---|---|---|---|---|
| Brand | Micro Commercial Components (MCC) | MCC | MCC | Diodes Incorporated | Vishay Intertechnology | onsemi | NXP Semiconductors |
| Package | SOD-123 | SOD-123 - same | SOD-123 - same | SOD-123 - same | SOD-123 - same | SOD-123 - same | SOD-123 - same |
| Repetitive Peak Reverse Voltage (Vrrm) | 100 V | 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 | 200 mA (+33%) |
| Reverse Recovery Time (trr) | 4 ns | 4 ns | 4 ns | 4 ns | 4 ns | 4 ns | 4 ns |
| Forward Voltage (Vf max) | 1.25 V at 150 mA | 1.25 V at 150 mA | 1.25 V at 150 mA | 0.715 V at 1 mA | 1.0 V at 100 mA | 1.25 V at 150 mA | 1.25 V at 150 mA |
| Junction Capacitance (Cj) | 4.0 pF | 4.0 pF | 4.0 pF | 2.0 pF | 4.0 pF | 4.0 pF | 4.0 pF |
| Halogen-Free / RoHS | Yes / Yes (HF suffix) | Yes / Yes | Yes / Yes | Yes / Yes (-F suffix) | Yes / Yes (-E3) | Yes / Yes | Yes / Yes |
Bảo phân biệt quan trọng
- Halogen-free finish in same SOD-123 footprint (vs1N4148W-TP (without HF))
- Lower junction capacitance versus industry cross-references (vs1N4148W-7-F (Diodes Incorporated))
- Drop-in compatible with multi-sourced 1N4148W platform (vsIndustry 1N4148W family across MCC / Diodes / Vishay / onsemi / NXP)
Ghi chú thiết kế
Estimated: At 150 mA continuous forward current with Vf = 1.0 V (typical), the diode dissipates roughly 150 mW. The SOD-123 package is rated for 400 mW absolute maximum at 25 °C on the standard JEDEC EIA/JESD51 1S2P test board, with derating required above 25 °C. For continuous 150 mA operation, derate linearly to zero at 150 °C junction temperature. Provide at least 25 mm² of copper pad area on each terminal to spread heat; without copper spreading, the effective steady-state current capability drops below 100 mA. Always compute worst-case dissipation including surge events.
Do not confuse the 1N4148W-TP-HF Vrrm rating (100 V repetitive) with its DC blocking rating (75 V). For circuits that hold reverse bias continuously, do not exceed 75 V DC. Also beware that the 150 mA If(AV) rating assumes single-sided mounting on a standard FR-4 test board; hand-soldered prototypes with minimal copper will derate significantly. For pulse currents up to 4.0 A Ifsm, the 8.3 ms half-sine rating must be observed - longer pulses require derating. Finally, ensure reflow profile peak temperature does not exceed 260 °C for the halogen-free finish.
Use 0805 or larger copper pad geometry on both anode and cathode lands. For high-frequency applications (above 10 MHz), keep the diode close to the protected node to minimize parasitic inductance and lead-loop area. A typical land pattern per IPC-7351 SOD-123 is 1.6 mm × 0.9 mm pad with 2.4 mm pitch. Forbid running noisy digital traces directly under the diode or between its pads, as the SOD-123's exposed pad and lead frame can capacitively couple switching noise into analog signal paths. Place a ground pour on the opposite PCB layer directly under the diode to provide a low-impedance return.
Thông tin tuân thủ
HF suffix denotes halogen-free finish per MCC product documentation. RoHS and REACH compliant. AEC-Q100 automotive qualification NOT present on the standard 1N4148W-TP-HF - choose automotive-grade variants such as Vishay 1N4148W-E3-08 (AEC-Q101) for automotive applications.
