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

Taiwan Semiconductor Corporation 1N5391G-T

Name: 1N5391G-T
Brand: Taiwan Semiconductor Corporation
SKU: 1N5391G-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5391G-T

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-204AC, DO-15, Axial

Datasheet:: 1N5391G-T.pdf

Description:: 1.5A, 50V, STANDARD RECTIFIER

Quantity:: RFQ Add To RFQ list

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Inventory:9,130

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Product details

Overview

1N5391G-T from Diodes Incorporated is a glass passivated general-purpose silicon rectifier diode in DO-15 package, rated for 50 V peak repetitive reverse voltage, 1.5 A average forward current at 55°C ambient, and 1.1 V forward voltage at 1.5 A. It delivers low leakage (5.0 µA at 25°C), 50 A non-repetitive surge capability, and is suited for AC/DC power supply input stage rectification in consumer adapters and industrial control power supplies.

For engineers reviewing the 1N5391G-T datasheet, 1N5391G-T pinout, 1N5391G-T application, or 1N5391G-T equivalent, key selection criteria include its 50 V blocking rating, thermal resistance (80 °C/W), DO-15 mechanical compatibility, surge robustness (50 A, 8.3 ms), and RoHS-compliant tin-plated leads.

Technical Context

This device operates as a single-phase, half-wave rectifier under 60 Hz resistive or inductive loads. Its glass passivation ensures stable junction performance and low surface leakage, critical for reliable operation across -65°C to +175°C junction temperature range.

The 1N5391G-T exhibits predictable forward conduction (V_F = 1.1 V @ 1.5 A) and reverse blocking behavior (I_R = 5.0 µA @ 50 V, 25°C), with capacitance of 15 pF at 1 MHz and 4 V reverse bias - parameters directly supporting EMI-limited and space-constrained linear power supply designs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	50 V - Maximum peak reverse voltage the diode sustains without breakdown during normal operation.
I_O	1.5 A @ T_A = 55°C - Continuous DC output current capability when leads are held at ambient at 9.5 mm from case.
V_F	1.1 V @ I_F = 1.5 A - Forward voltage drop determining conduction loss and thermal dissipation in rectifier stage.
I_FSM	50 A (8.3 ms half-sine) - Surge current tolerance enabling survival during AC line turn-on transients.
R_θJA	80 °C/W - Junction-to-ambient thermal resistance defining heatsinking requirements for sustained 1.5 A operation.
I_R	5.0 µA @ 50 V, 25°C - Reverse leakage current affecting standby power and high-impedance circuit integrity.
C_T	15 pF @ 1 MHz, 4 V - Junction capacitance influencing high-frequency noise coupling and switching speed in rectifier circuits.

Pinout & Package

Package: DO-15 molded plastic case (UL 94V-0), cathode indicated by band, lead finish: matte tin, weight ≈ 0.4 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to AC source or transformer secondary; must withstand surge and thermal stress during conduction.
Cathode	Forward current exit point	Connected to filter capacitor or load; polarity marking (band) ensures correct orientation in PCB layout.

Key Features

Feature	Design Value
Glass passivated die	Enables stable reverse leakage (<5 µA) and long-term reliability under humidity and thermal cycling.
50 A surge rating	Supports inrush current handling in unregulated linear supplies without fuse coordination issues.
DO-15 package	Standard through-hole footprint compatible with legacy power supply layouts and automated insertion equipment.
RoHS-compliant tin finish	Ensures solderability per MIL-STD-202 Method 208 and eliminates lead-based process concerns.

Applications

AC/DC Wall Adapters

Industrial Control Power Supplies

Use Scenario: Low-cost 5–12 V DC output adapter for home appliances and IoT peripherals.

IC Role / Device Role / Timing Role: Primary-side rectifier converting 50/60 Hz AC to pulsating DC before bulk capacitance filtering.

Use Value: 1.1 V V_F minimizes conduction loss at 1.5 A, reducing thermal stress on compact PCBs without heatsinks.

Use Scenario: Auxiliary 24 V power rail generation in PLC I/O modules and motor drive logic boards.

IC Role / Device Role / Timing Role: Input rectifier in unregulated linear supply feeding LDOs or optocoupler drivers.

Use Value: 50 V V_RRM provides margin over 35 V RMS transformer secondaries, ensuring safe operation under line surges.

LED Driver Input Stage

Legacy Equipment Repair

Use Scenario: Rectification in constant-voltage LED driver front-end for signage and architectural lighting.

IC Role / Device Role / Timing Role: Half-wave rectifier feeding capacitive-input filter and buck converter controller.

Use Value: 15 pF junction capacitance limits high-frequency noise injection into downstream switching stages.

Use Scenario: Replacement diode in discontinued industrial instrumentation and telecom power units.

IC Role / Device Role / Timing Role: Drop-in substitute for obsolete 1N400x-series rectifiers where 50 V rating suffices.

Use Value: DO-15 footprint and cathode band marking ensure mechanical and polarity compatibility with existing PCBs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar general-purpose rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4001-T	Same DO-15 package; lower V_RRM (50 V), identical I_O (1.5 A), higher V_F (1.1 V typical same), but no glass passivation.	Higher leakage (up to 50 µA) and reduced surge robustness (30 A vs. 50 A) limit use in humid or high-transient environments.	Select only if cost sensitivity outweighs reliability requirements and surge exposure is minimal.
RS1M	DO-15, 1 A I_O, 1000 V V_RRM, faster recovery (~500 ns), glass passivated, lower leakage (≤5 µA).	Over-spec'd reverse voltage reduces efficiency in 50 V systems; lower current rating restricts use to ≤1 A loads.	Choose when higher voltage margin or faster recovery is needed, but derate current to 1 A maximum.

Compared with 1N4001-T and RS1M, the 1N5391G-T uniquely balances 50 V rating, 1.5 A current, 50 A surge, and glass passivation - making it optimal for cost-sensitive, thermally constrained 50 V rectifier applications where reliability under transient stress matters.

Availability

1N5391G-T is available at Aetrix Electronics and suitable for AC/DC wall adapters, industrial control power supplies, LED driver input stages, and legacy equipment repair requiring stable component supply and DO-15 through-hole compatibility.

Supply support for 1N5391G-T 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, specializing in high-reliability, application-optimized components for power management, signal integrity, and protection.

The 1N5391G-T belongs to Diodes' general-purpose rectifier product line, designed specifically for cost-effective, robust AC/DC conversion in consumer, industrial, and infrastructure power supplies where proven DO-15 reliability is required.

FAQ

Is the 1N5391G-T suitable for new designs?

No - Diodes Incorporated explicitly marks this part as "NOT RECOMMENDED FOR NEW DESIGN" due to obsolescence roadmap alignment. It remains fully supported for legacy repair and production continuity, but newer alternatives like the RS1M or M1 series are preferred for design-ins requiring extended lifecycle assurance.

What is the maximum operating temperature for continuous 1.5 A operation?

Continuous 1.5 A operation is rated at T_A = 55°C with leads held at ambient temperature at 9.5 mm from the case. At higher ambient temperatures, derating is required per Figure 1 - e.g., at 85°C ambient, max I_O drops to ~1.0 A.

Does the 1N5391G-T have a specified reverse recovery time?

No - the datasheet does not specify reverse recovery time (t_rr). It is characterized as a general-purpose rectifier, not a fast-recovery device; typical t_rr exceeds 2 µs, making it unsuitable for high-frequency switching applications above 20 kHz.

Can the 1N5391G-T be used in capacitive-input filter circuits?

Yes, but with 20% current derating per datasheet note - i.e., limit I_O to 1.2 A - due to higher peak currents drawn by capacitive-input filters, which increase thermal stress and reduce reliability over time.

1N5391G-T Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-204AC, DO-15, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 50 V

Current - Average Rectified (Io):: 1.5A

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 1.5 A

Speed:: Standard Recovery >500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 5 µA @ 50 V

Capacitance @ Vr, F:: 15pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AC (DO-15)

Operating Temperature - Junction:: -55°C ~ 150°C

1N5391G-T FAQ

1.How can I place an order for 1N5391G-T through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5391G-T 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 1N5391G-T reliable?

The price and inventory of 1N5391G-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5391G-T is usually 5 days.

3.What payment methods are accepted for 1N5391G-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5391G-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5391G-T?

1N5391G-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5391G-T 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 1N5391G-T?

For technical support, including 1N5391G-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5391G-T requirements.

6.How does Aetrix verify that 1N5391G-T is sourced from the original manufacturer or authorized distributors?

All 1N5391G-T 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 1N5391G-T meets industry standards.

7.What is the process for return or replacement of 1N5391G-T?

All 1N5391G-T units undergo pre-shipment inspection (PSI). If there is an issue with 1N5391G-T, 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 1N5391G-T part is unused and in its original packaging.

Return procedure for 1N5391G-T:

1.Submit a request within 90 days.

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

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