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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

NXP Semiconductors PRLL5818,115

Name: PRLL5818,115
Brand: NXP Semiconductors
SKU: PRLL5818,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PRLL5818,115

Manufacturer:: NXP Semiconductors

Category:: Single Diodes

Package:: SOD-87

Datasheet:: PRLL5818,115.pdf

Description:: DIODE SCHOTTKY 30V 1A MELF

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Product details

Overview

PRLL5818 from Nexperia is a Schottky barrier diode in a hermetically sealed glass SOD87 surface-mount package, rated for 30 V continuous reverse voltage, 1 A average forward current, and 550 mV forward voltage at 1 A (T_A = 25 °C), used for polarity protection and low-power SMPS rectification.

For engineers reviewing the PRLL5818 datasheet, PRLL5818 pinout, PRLL5818 application, or PRLL5818 equivalent, key selection criteria include its 30 V V_R, 1 A I_F(AV), 550 mV V_F @ 1 A, 50 pF capacitance at 4 V, and SOD87 thermal resistance of 150 K/W - all critical for compact, thermally constrained DC/DC designs.

Technical Context

The PRLL5818 employs planar Schottky technology with guard ring protection to suppress edge breakdown and ensure stable reverse leakage under thermal stress. Its Implotec™-enhanced SOD87 package provides hermetic sealing and reliable solder-joint integrity for high-reliability industrial and computing applications.

Designed for low-loss unidirectional conduction, it delivers fast recovery (no minority-carrier storage) and operates up to 125 °C junction temperature. Reverse leakage remains ≤1 mA at V_R = 30 V and ≤10 mA at 100 °C, supporting robust operation in ambient-temperature-variable environments.

Key Specifications

Parameter	Value and Actual Design Meaning
V_R	30 V continuous reverse voltage - sets maximum blocking capability in polarity protection or freewheeling paths
I_F(AV)	1 A average forward current at T_amb = 60 °C - defines steady-state power delivery capacity in SMPS outputs
V_F @ 1 A	550 mV typical at 25 °C - enables <1 W conduction loss per diode in 1 A rail applications
C_d	50 pF at V_R = 4 V, f = 1 MHz - minimizes switching node ringing in high-frequency (>100 kHz) converters
R_{th j-a}	150 K/W - requires minimal PCB copper area for thermal management in space-constrained layouts
I_FSM	25 A non-repetitive peak forward surge (10 ms half-sine) - withstands inrush and fault transients without failure

Pinout & Package

SOD87 is a hermetically sealed glass surface-mount package with two terminals: anode and cathode. The cathode is marked by a band on the glass body.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to input/source side in rectifier or protection configurations; must handle full load current and surge
Cathode	Forward current exit point; marked with band	Connected to output/load side; polarity marking ensures correct orientation during automated placement

Key Features

Feature	Design Value
Guard ring protected junction	Prevents premature edge breakdown under high dv/dt or elevated temperature, improving long-term reliability in noisy systems
Hermetically sealed glass SMD package	Eliminates moisture ingress and intermetallic degradation, enabling >10-year field life in humid or thermally cycled environments
Low forward voltage (550 mV @ 1 A)	Reduces conduction losses by ~30% vs. comparable silicon diodes, directly improving efficiency in battery-powered or thermally limited designs
Fast recovery (Schottky architecture)	Zero reverse recovery charge (Q_rr ≈ 0) eliminates switching losses and EMI associated with minority-carrier tail current

Applications

USB Power Delivery Protection	Industrial Sensor Supply Rectification
Use Scenario: Preventing reverse-current flow from downstream USB-C PD ports into upstream power sources during hot-plug events. IC Role / Device Role / Timing Role: Polarity protection diode placed in series with VBUS path to block backfeed while minimizing voltage drop. Use Value: 550 mV V_F at 1 A preserves >4.45 V at load under full 1 A PD negotiation, meeting USB PD 3.0 voltage tolerance requirements.	Use Scenario: Rectifying 12 V AC-to-DC auxiliary supply for analog sensor front-ends in factory automation PLC modules. IC Role / Device Role / Timing Role: Low-loss output rectifier in compact flyback or buck-derived isolated supply operating at 250 kHz. Use Value: 50 pF capacitance and zero Q_rr prevent switching node oscillation and reduce EMI filter component count in space-limited sensor PCBs.
Wearable Device Battery Charging Path	Embedded Controller Power Sequencing
Use Scenario: Isolating primary Li-ion battery from USB charging circuitry to prevent parasitic discharge when host is disconnected. IC Role / Device Role / Timing Role: Unidirectional power-path switch enabling charge-only flow from USB to battery, not vice versa. Use Value: 1 mA max reverse leakage at 30 V ensures <1 μA standby drain - extending shelf life beyond 6 months in shipped wearable units.	Use Scenario: Enabling controlled power-up sequencing between FPGA core and I/O banks using discrete OR-ing in multi-rail supplies. IC Role / Device Role / Timing Role: Diode-OR element ensuring clean, glitch-free rail activation without cross-conduction or latch-up risk. Use Value: 125 °C max junction temperature and 150 K/W R_{th j-a} allow direct mounting on dense logic PCBs without heatsinks or airflow.

USB Power Delivery Protection

Industrial Sensor Supply Rectification

Use Scenario: Preventing reverse-current flow from downstream USB-C PD ports into upstream power sources during hot-plug events.

IC Role / Device Role / Timing Role: Polarity protection diode placed in series with VBUS path to block backfeed while minimizing voltage drop.

Use Value: 550 mV V_F at 1 A preserves >4.45 V at load under full 1 A PD negotiation, meeting USB PD 3.0 voltage tolerance requirements.

Use Scenario: Rectifying 12 V AC-to-DC auxiliary supply for analog sensor front-ends in factory automation PLC modules.

IC Role / Device Role / Timing Role: Low-loss output rectifier in compact flyback or buck-derived isolated supply operating at 250 kHz.

Use Value: 50 pF capacitance and zero Q_rr prevent switching node oscillation and reduce EMI filter component count in space-limited sensor PCBs.

Wearable Device Battery Charging Path

Embedded Controller Power Sequencing

Use Scenario: Isolating primary Li-ion battery from USB charging circuitry to prevent parasitic discharge when host is disconnected.

IC Role / Device Role / Timing Role: Unidirectional power-path switch enabling charge-only flow from USB to battery, not vice versa.

Use Value: 1 mA max reverse leakage at 30 V ensures <1 μA standby drain - extending shelf life beyond 6 months in shipped wearable units.

Use Scenario: Enabling controlled power-up sequencing between FPGA core and I/O banks using discrete OR-ing in multi-rail supplies.

IC Role / Device Role / Timing Role: Diode-OR element ensuring clean, glitch-free rail activation without cross-conduction or latch-up risk.

Use Value: 125 °C max junction temperature and 150 K/W R_{th j-a} allow direct mounting on dense logic PCBs without heatsinks or airflow.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SS13 (DO-214AC/SMA)	30 V V_R, 1 A I_F(AV), but 700 mV V_F @ 1 A and 120 pF C_d; plastic package, higher R_{th j-a} (~200 K/W)	Higher conduction loss and capacitance limit use in >500 kHz SMPS or ultra-low-drop protection	Select SS13 only where cost sensitivity outweighs efficiency or EMI performance in non-critical consumer applications
BAT54C (SOT-23)	30 V V_R, but only 200 mA I_F(AV); 350 mV V_F @ 100 mA; 10 pF C_d; smaller footprint, lower surge rating (I_FSM = 2 A)	Insufficient current handling for 1 A rails; suitable only for signal-level or biasing functions	Use BAT54C only in low-current signal clamping or level-shifting - not as a power rectifier replacement for PRLL5818

Compared with SS13 and BAT54C, PRLL5818 uniquely balances 1 A current capability, 550 mV low V_F, 50 pF low capacitance, and hermetic SOD87 reliability - making it optimal for industrial-grade 1 A SMPS outputs and robust polarity protection where long-term stability matters.

Availability

PRLL5818 is available at Aetrix Electronics and suitable for low-power switched-mode power supplies, polarity protection circuits, and industrial sensor supply rectification requiring stable component supply across extended production lifecycles.

Supply support for PRLL5818 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

Nexperia is a global leader in discrete, logic, and PowerMOS semiconductors, spun off from NXP's Standard Products division in 2017 and focused on automotive, industrial, computing, and consumer markets.

The PRLL5818 belongs to Nexperia's legacy Schottky diode portfolio designed specifically for high-reliability, low-loss rectification and protection in space-constrained, thermally demanding applications - emphasizing hermetic sealing, guard ring robustness, and consistent parametric performance.

FAQ

What is the maximum junction temperature rating for PRLL5818?

The PRLL5818 has a maximum junction temperature (T_j) of 125 °C, verified per IEC 134 limiting values. This rating allows continuous operation in industrial ambient environments up to 85 °C when mounted per SOD87 standard conditions and derated according to its thermal resistance of 150 K/W. The PRLL5818 maintains specified electrical characteristics within this range.

Does PRLL5818 have a cathode marking, and how is it identified?

Yes, the PRLL5818 features a visible cathode band on its hermetically sealed glass SOD87 package body. This marking aligns with the device symbol and confirms terminal polarity during visual inspection and automated optical recognition (AOI) in SMT assembly. The PRLL5818 datasheet explicitly states "the marking indicates the cathode" in the package outline section.

What is the reverse leakage current specification for PRLL5818 at 30 V and 100 °C?

At V_R = 30 V and T_j = 100 °C, the PRLL5818 exhibits a reverse leakage current (I_R) of 5 to 10 mA, as specified in the Electrical Characteristics table. This value reflects worst-case thermal stress and is critical for evaluating hold-off integrity in high-temperature polarity protection circuits. The PRLL5818 datasheet provides this exact condition and range.

Is PRLL5818 suitable for use in automotive applications?

The PRLL5818 is not qualified to AEC-Q101 or automotive-specific standards per its original 1999 datasheet and product status. While its 125 °C T_j and hermetic SOD87 package offer inherent robustness, Nexperia's official documentation positions it for industrial, computing, and consumer use - not automotive. For automotive designs, engineers should select AEC-Q101-qualified Nexperia Schottky diodes instead of PRLL5818.

What is the non-repetitive peak forward surge rating for PRLL5818?

The PRLL5818 is rated for a non-repetitive peak forward current (I_FSM) of 25 A under a 10 ms half-sine waveform with T_j at maximum prior to surge and V_R = 0. This rating supports transient inrush current handling in power supplies and motor drivers. The PRLL5818 datasheet lists this value in the Limiting Values table without qualification or derating.

PRLL5818,115 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: -

Package/Case:: SOD-87

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 30 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 550 mV @ 1 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 1 mA @ 30 V

Capacitance @ Vr, F:: 50pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: MELF

Operating Temperature - Junction:: 125°C (Max)

PRLL5818,115 FAQ

1.How can I place an order for PRLL5818,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for PRLL5818,115 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 PRLL5818,115 reliable?

The price and inventory of PRLL5818,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PRLL5818,115 is usually 5 days.

3.What payment methods are accepted for PRLL5818,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PRLL5818,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PRLL5818,115?

PRLL5818,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PRLL5818,115 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 PRLL5818,115?

For technical support, including PRLL5818,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PRLL5818,115 requirements.

6.How does Aetrix verify that PRLL5818,115 is sourced from the original manufacturer or authorized distributors?

All PRLL5818,115 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 PRLL5818,115 meets industry standards.

7.What is the process for return or replacement of PRLL5818,115?

All PRLL5818,115 units undergo pre-shipment inspection (PSI). If there is an issue with PRLL5818,115, 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 PRLL5818,115 part is unused and in its original packaging.

Return procedure for PRLL5818,115:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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