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Diodes Incorporated LL4148-13
- Part No.:
- LL4148-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-213AC, MINI-MELF, SOD-80
- Datasheet:
-
LL4148-13.pdf
- Description:
- SMALL SGNL DIODE SOD80 100V 175C
- Quantity:
- Payment:
- Shipping:
Inventory:3,383
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Product details
Overview
LL4148-13 from Diodes Incorporated is a fast-switching silicon epitaxial planar surface-mount diode in MiniMELF glass package, rated for 75 V peak repetitive reverse voltage, 300 mA forward current, and 4.0 ns reverse recovery time; used for general-purpose rectification and signal clamping in high-frequency consumer and industrial power supplies.
For engineers reviewing the LL4148-13 datasheet, LL4148-13 pinout, LL4148-13 application, or LL4148-13 equivalent, key selection criteria include reverse recovery time, forward voltage at 10 mA, leakage current at 75 V and 150°C, thermal resistance (300 K/W), and MiniMELF mechanical compatibility with automated placement systems.
Technical Context
The LL4148-13 employs a silicon epitaxial planar structure optimized for fast switching, with a cathode band polarity marking and Sn97.5Ag2.5 lead-free terminal finish compliant with RoHS and MIL-STD-202 solderability standards. Its glass MiniMELF case meets UL 94V-0 flammability rating.
Designed for surface-mount automatic insertion, it operates across –65°C to +175°C junction temperature range and exhibits 5.0 μA max reverse leakage at VR = 75 V and TA = 25°C, rising to 50 μA at TJ = 150°C - critical for high-temperature signal integrity in compact power stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRMS | 53 V - defines maximum continuous AC reverse voltage before breakdown in bridge or clamper configurations |
| VF @ IF = 10 mA | ≤1.0 V - ensures low conduction loss in logic-level signal routing and sample-and-hold circuits |
| trr | 4.0 ns - enables reliable operation up to ~100 MHz switching in oscillator and pulse-shaping applications |
| IFSM @ t = 1.0 μs | 2.0 A - supports transient overcurrent handling during ESD or inductive kick events |
| CJ @ VR = 0 | 4.0 pF - minimizes capacitive loading on high-speed digital lines and RF detector inputs |
| RθJA | 300 K/W - requires careful PCB copper area design to maintain TJ < 150°C under 300 mA DC load |
Pinout & Package
MiniMELF glass package: cylindrical body (3.3–3.7 mm length × 1.3–1.6 mm diameter), cathode band marking, Sn97.5Ag2.5 terminals, moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node in rectifier/clamp; must be routed with minimal inductance for <4 ns recovery fidelity |
| Cathode | Forward current exit / reverse blocking terminal | Marked by visible band; ties to higher-potential rail or signal reference; determines polarity in clipping circuits |
Key Features
| Feature | Design Value |
|---|---|
| Fast switching speed | 4.0 ns trr enables use in >50 MHz clock line steering and pulse edge sharpening without distortion |
| Surface-mount MiniMELF | 0.05 g mass and 3.5 mm × 1.45 mm footprint support high-density automated assembly in space-constrained modules |
| Silicon epitaxial planar construction | Provides consistent VF matching and low parameter drift across production lots for precision analog sampling |
| RoHS-compliant Sn97.5Ag2.5 finish | Ensures compatibility with lead-free reflow profiles (peak 260°C) without voiding or dewetting in volume manufacturing |
Applications
| High-Frequency Signal Clamping | Digital Logic Level Translation |
|---|---|
Use Scenario: Protecting CMOS input pins from voltage overshoot during hot-plug or bus contention in USB 2.0 transceivers. IC Role / Device Role / Timing Role: Fast clamping diode limiting signal swing to VDD + 0.7 V and GND − 0.3 V. Use Value: 4.0 ns trr prevents latch-up by clearing clamp current before next clock edge in 48 MHz data streams. | Use Scenario: Interfacing 5 V TTL outputs to 3.3 V FPGA I/O banks with bidirectional level shifting. IC Role / Device Role / Timing Role: Passive diode-based level translator using forward conduction and reverse isolation. Use Value: ≤1.0 V VF at 10 mA ensures output high remains ≥2.7 V, meeting 3.3 V LVTTL VIH min requirement. |
| Switch-Mode Power Supply Snubbing | RF Detector Diode |
Use Scenario: Suppressing voltage spikes across MOSFET drains in 300 kHz flyback converters. IC Role / Device Role / Timing Role: Snubber diode conducting during turn-off transition to absorb leakage inductance energy. Use Value: 2.0 A IFSM (1 μs) handles single-cycle surge without degradation, extending MOSFET lifetime. | Use Scenario: Demodulating 900 MHz ISM-band RF signals in low-cost wireless sensor nodes. IC Role / Device Role / Timing Role: Zero-bias envelope detector converting RF amplitude to baseband DC voltage. Use Value: 4.0 pF CJ minimizes shunt capacitance loading on antenna feedline, preserving Q-factor above 800 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast-switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4148W-7 | Same electrical specs; SOD-123 plastic package instead of MiniMELF glass | Lower thermal resistance (220 K/W vs. 300 K/W); less suitable for high-temp ambient (>105°C) | Prefer for cost-sensitive, lower-power PCBs where automated optical inspection favors rectangular footprint |
| BAS16W-7 | Lower VR (80 V), faster trr (3.0 ns), higher IF (215 mA avg) | Optimized for digital switching; not rated for 300 mA continuous forward current | Choose when circuit demands sub-3 ns recovery and operates below 80 V reverse stress with <200 mA average load |
Compared with 1N4148W-7 and BAS16W-7, LL4148-13 offers superior high-temperature reliability (175°C TJ rating) and glass-package hermeticity for harsh environments, but requires tighter placement tolerance due to MiniMELF's cylindrical geometry.
Availability
LL4148-13 is available at Aetrix Electronics and suitable for high-frequency signal clamping, digital level translation, switch-mode power supply snubbing, and RF detector applications requiring stable component supply and long-term industrial availability.
Supply support for LL4148-13 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers and manufacturing facilities across Asia and the Americas.
The LL4148-13 belongs to Diodes' general-purpose fast-switching diode product line, engineered for high-reliability signal conditioning and power conversion in consumer, industrial, and computing equipment where robustness and consistency are prioritized over ultra-low capacitance or nanosecond-scale timing.
FAQ
Is LL4148-13 RoHS compliant and lead-free?
Yes. LL4148-13 features Sn97.5Ag2.5 lead-free terminations and complies with EU Directive 2011/65/EU (RoHS 2), including all applicable exemptions. The glass MiniMELF case carries UL 94V-0 flammability rating, and solderability is verified per MIL-STD-202, Method 208.
What is the maximum operating temperature and thermal derating behavior?
The LL4148-13 has a junction temperature range of –65°C to +175°C. Its thermal resistance is 300 K/W (junction-to-ambient). Power dissipation must be linearly derated above 25°C at 1.68 mW/°C - meaning PD drops to 332 mW at 125°C ambient with no heatsinking.
How does LL4148-13 differ from LL4448-7 in forward voltage performance?
LL4148-13 specifies VF ≤ 1.0 V at IF = 10 mA, while LL4448-7 guarantees VF between 0.62 V and 0.72 V at IF = 5.0 mA. The LL4448 variant is optimized for lower forward drop at light loads, whereas LL4148 maintains tighter VF control at moderate currents typical in logic interface circuits.
Why is LL4148-13 marked "NOT RECOMMENDED FOR NEW DESIGN USE"?
This designation reflects Diodes Incorporated's internal product lifecycle guidance: newer alternatives like 1N4148W-7 (SOD-123) offer improved manufacturability and thermal performance, though LL4148-13 remains fully qualified, in-production, and supported for legacy designs and applications requiring MiniMELF's hermetic glass package and proven high-temperature stability.
LL4148-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-213AC, MINI-MELF, SOD-80
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 75 V
- Current - Average Rectified (Io):
- 150mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 10 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 4 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 75 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Mini MELF
- Operating Temperature - Junction:
- -65°C ~ 175°C
LL4148-13 FAQ
1.How can I place an order for LL4148-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for LL4148-13 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LL4148-13 reliable?
The price and inventory of LL4148-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LL4148-13 is usually 5 days.
3.What payment methods are accepted for LL4148-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LL4148-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LL4148-13?
LL4148-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LL4148-13 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LL4148-13?
For technical support, including LL4148-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LL4148-13 requirements.
6.How does Aetrix verify that LL4148-13 is sourced from the original manufacturer or authorized distributors?
All LL4148-13 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LL4148-13 meets industry standards.
7.What is the process for return or replacement of LL4148-13?
All LL4148-13 units undergo pre-shipment inspection (PSI). If there is an issue with LL4148-13, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LL4148-13 part is unused and in its original packaging.
Return procedure for LL4148-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LL4148-13 Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
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