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

STMicroelectronics 1N5822RL

Name: 1N5822RL
Brand: STMicroelectronics
SKU: 1N5822RL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5822RL

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: 1N5822RL.pdf

Description:: DIODE SCHOTTKY 40V 3A DO201AD

Quantity:: RFQ Add To RFQ list

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Inventory:20,588

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Product details

Overview

1N5822RL from STMicroelectronics is a 40 V, 3 A axial-leaded Schottky rectifier in DO-201AD package, optimized for low forward voltage drop (0.525 V at 3 A, 25°C), negligible switching losses, and fast recovery-used in DC/DC converters, battery chargers, and polarity protection circuits.

For engineers reviewing the 1N5822RL datasheet, 1N5822RL pinout, 1N5822RL application, or 1N5822RL equivalent, key selection criteria include its 40 V repetitive peak reverse voltage, 80 A surge current capability, 150°C max junction temperature, and thermal resistance of 80°C/W (junction-to-ambient, 10 mm lead length).

Technical Context

This Schottky diode employs a metal–semiconductor junction to eliminate minority-carrier storage delay, enabling extremely fast switching with no reverse recovery time. Its low forward voltage minimizes conduction loss in high-frequency, low-voltage power stages.

The device features specified avalanche capability (1700 W, 1 µs pulse), dV/dt rating of 10,000 V/µs, and operates reliably up to 150°C junction temperature-making it suitable for compact, thermally constrained switch-mode supplies where thermal runaway risk must be mitigated.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - Maximum repetitive reverse blocking voltage; defines safe operating range in flyback or freewheeling configurations.
I_F(AV)	3 A at T_L = 110°C, δ = 0.5 - Continuous DC current handling under defined thermal conditions.
V_F (max)	0.525 V at I_F = 3 A, T_j = 25°C - Directly reduces conduction loss and improves efficiency in low-voltage outputs.
I_FSM	80 A (10 ms sinusoidal) - Withstands short-term overload during startup or fault transients without failure.
R_th(j-a)	80 °C/W (lead length = 10 mm) - Quantifies self-heating under natural convection; critical for board-level thermal design.
T_j(max)	150 °C - Enables operation in high-ambient environments such as enclosed industrial power modules.
dV/dt	10,000 V/µs - Ensures stable blocking during rapid voltage transients common in SMPS snubber networks.

Pinout & Package

Package: DO-201AD - Axial-leaded, epoxy-molded plastic case (UL94 V-0 rated), 9.5 mm body length, 25.4 mm overall length, 1.3 mm lead diameter, cathode identified by ring marking.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unmarked end)	Current entry point during forward conduction	Connected to lower-potential node (e.g., ground side of buck converter low-side switch).
Cathode (ring-marked end)	Current exit point during forward conduction; reverse-blocking terminal	Connected to higher-potential node (e.g., output rail); polarity protection depends on correct orientation.

Key Features

Feature	Design Value
Low forward voltage drop	0.525 V @ 3 A, 25°C - Reduces power loss by ~30% vs. comparable PN rectifiers, improving efficiency in 3.3–12 V systems.
Negligible switching losses	No reverse recovery charge (Q_rr ≈ 0) - Eliminates switching loss spikes and EMI in >100 kHz DC/DC topologies.
Avalanche-rated capability	1700 W peak power (1 µs pulse) - Absorbs inductive energy safely during MOSFET turn-off in non-synchronous buck or flyback designs.
High dV/dt immunity	10,000 V/µs - Prevents false turn-on in high-dV/dt noise environments like motor drive gate-drive return paths.
Wide operating temperature	−65°C to +150°C storage and operation - Supports deployment in automotive under-hood or industrial outdoor enclosures.

Applications

DC/DC Converter Output Rectification

Battery Charger Polarity Protection

Use Scenario: Used as secondary-side rectifier in 5 V/3 A isolated flyback converter powering IoT edge nodes.

IC Role / Device Role / Timing Role: Unidirectional current path delivering regulated DC output while minimizing voltage drop and heat generation.

Use Value: 0.525 V V_F enables >92% efficiency at full load, reducing heatsink requirement versus silicon diodes.

Use Scenario: Placed in series with Li-ion battery input to prevent damage from reversed adapter connection.

IC Role / Device Role / Timing Role: Passive polarity guard; conducts only when input polarity matches system design.

Use Value: Low V_F ensures minimal voltage loss (<26 mV at 50 mA standby), preserving battery runtime.

SMPS Freewheeling Diode

Low-Voltage Inverter Output Stage

Use Scenario: Freewheeling path for 24 V, 3 A buck converter driving solenoid valves in factory automation PLC modules.

IC Role / Device Role / Timing Role: Provides continuous current path during high-side switch off-time to maintain inductor current continuity.

Use Value: Fast switching and zero Q_rr suppress voltage overshoot and reduce snubber component count.

Use Scenario: Output stage clamp and commutation diode in 12 V, 50 kHz H-bridge inverter for small AC fans.

IC Role / Device Role / Timing Role: Suppresses inductive kickback and enables bidirectional current flow during PWM dead-time.

Use Value: 150°C T_j(max) and 80 A I_FSM support transient overloads during fan stall conditions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SB340-TB	40 V V_RRM, 3 A I_F(AV), VF = 0.55 V @ 3 A - Slightly higher forward drop; TO-277 surface-mount package.	Requires PCB rework for SMT assembly; lacks axial leads for through-hole prototyping or wire-ended modules.	Prefer for automated production where board space is constrained and thermal pad access is available.
SS34-E3/57T	40 V V_RRM, 3 A I_F(AV), VF = 0.5 V @ 3 A - Lower V_F; SMA package; R_th(j-a) = 65°C/W.	Higher thermal performance but smaller footprint; not mechanically compatible with DO-201AD mounting holes or axial wiring.	Choose when thermal margin is critical and mechanical redesign is acceptable.

Compared with SB340-TB and SS34-E3/57T, the 1N5822RL offers proven axial-leaded reliability, UL94 V-0 epoxy housing, and direct compatibility with legacy through-hole power supply layouts-making it optimal for field-serviceable, low-volume, or ruggedized designs.

Availability

1N5822RL is available at Aetrix Electronics and suitable for DC/DC converters, battery chargers, and industrial freewheeling circuits requiring stable component supply across extended product lifecycles.

Supply support for 1N5822RL 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.

The 1N582x series belongs to ST's general-purpose power diode portfolio, engineered specifically for cost-sensitive, high-efficiency low-voltage switching power supplies where low V_F and robust surge capability are essential.

FAQ

What is the maximum junction temperature and how does it affect layout?

The 1N5822RL has a maximum junction temperature of 150°C. To sustain this limit, PCB copper area and lead length must be controlled: thermal resistance is 80°C/W with 10 mm leads and no heatsink. For ambient temperatures above 75°C, derate average current per Figure 5-2, and avoid enclosing the diode without airflow.

Is the 1N5822RL suitable for synchronous rectification?

No - the 1N5822RL is a passive Schottky rectifier, not a synchronous MOSFET driver or integrated controller. It cannot replace active synchronous rectifiers (e.g., SR controllers + MOSFETs) but serves as the baseline diode in non-synchronous topologies where simplicity and cost outweigh marginal efficiency gains.

How does its avalanche rating compare to standard rectifiers?

Unlike most standard PN rectifiers, the 1N5822RL specifies a 1700 W repetitive peak avalanche power (1 µs pulse, 25°C). This allows it to absorb inductive energy safely during MOSFET turn-off in non-synchronous buck or flyback converters-reducing need for external clamping components.

Can it replace the 1N5821 or 1N5820 in existing designs?

Yes - the 1N5822RL is pin-compatible and functionally upward-compatible with 1N5821 (30 V) and 1N5820 (20 V) in DO-201AD. Its higher 40 V V_RRM provides additional reverse margin, though forward voltage is slightly higher (0.525 V vs. 0.5 V and 0.475 V), requiring verification of conduction loss impact in low-V_OUT designs.

1N5822RL Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: DO-201AD, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 40 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 525 mV @ 3 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 2 mA @ 40 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-201AD

Operating Temperature - Junction:: 150°C (Max)

1N5822RL FAQ

1.How can I place an order for 1N5822RL through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5822RL 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 1N5822RL reliable?

The price and inventory of 1N5822RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5822RL is usually 5 days.

3.What payment methods are accepted for 1N5822RL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5822RL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5822RL?

1N5822RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5822RL 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 1N5822RL?

For technical support, including 1N5822RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5822RL requirements.

6.How does Aetrix verify that 1N5822RL is sourced from the original manufacturer or authorized distributors?

All 1N5822RL 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 1N5822RL meets industry standards.

7.What is the process for return or replacement of 1N5822RL?

All 1N5822RL units undergo pre-shipment inspection (PSI). If there is an issue with 1N5822RL, 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 1N5822RL part is unused and in its original packaging.

Return procedure for 1N5822RL:

1.Submit a request within 90 days.

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

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