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

Diodes Incorporated 1N4933G-T

Name: 1N4933G-T
Brand: Diodes Incorporated
SKU: 1N4933G-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N4933G-T

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

Package:: DO-204AL, DO-41, Axial

Datasheet:: 1N4933G-T.pdf

Description:: DIODE GEN PURP 50V 1A DO41

Quantity:: RFQ Add To RFQ list

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Inventory:4,227

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Product details

Overview

1N4933G-T from Diodes Incorporated is a 1.0A fast recovery glass passivated rectifier diode in DO-41 package, rated for 50V peak repetitive reverse voltage (V_RRM), 1.2V forward voltage at 1.0A, and 200ns reverse recovery time - deployed in AC/DC input stage rectification for low-cost power supplies and auxiliary bias rails.

For engineers reviewing the 1N4933G-T datasheet, 1N4933G-T pinout, 1N4933G-T application, or 1N4933G-T equivalent, key selection criteria include V_RRM margin vs. line surge, thermal derating at 75°C ambient, I_FSM capability under 8.3ms half-sine surge, and junction-to-ambient thermal resistance of 100 K/W with 9.5mm lead length.

Technical Context

This discrete silicon rectifier uses a diffused PN junction and glass passivation to achieve fast switching (t_rr = 200 ns) while maintaining robust surge tolerance (I_FSM = 30 A). Its low forward voltage (V_FM = 1.2 V @ 1.0 A) reduces conduction loss in low-voltage, high-current secondary-side rectification.

The device operates across –65°C to +150°C, with reverse leakage limited to 5.0 µA at 25°C and 100 µA at 100°C under rated DC blocking voltage. Junction capacitance is 15 pF at 4.0 V reverse bias and 1.0 MHz, supporting stable performance in moderate-frequency rectifier circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	50 V - Maximum non-repetitive reverse voltage before breakdown; sets minimum clearance for 36 VAC RMS input designs.
I_O	1.0 A @ T_A = 75°C - Continuous average forward current rating with 9.5 mm lead length; defines usable output capacity in open-frame SMPS.
V_FM	1.2 V @ I_F = 1.0 A - Forward conduction loss at full load; determines ~1.2 W dissipation in worst-case continuous operation.
t_rr	200 ns - Reverse recovery time measured at I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A; enables use up to ~100 kHz switching without excessive switching loss.
I_FSM	30 A (8.3 ms half-sine) - Non-repetitive surge withstand; protects against inrush and lightning-induced transients on AC mains inputs.
R_θJA	100 K/W - Thermal resistance junction-to-ambient with specified lead length; requires heatsinking or airflow for sustained >0.5 A at >75°C ambient.
C_j	15 pF @ 4.0 V, 1.0 MHz - Junction capacitance; contributes minimal displacement current in 50/60 Hz rectifier applications.

Pinout & Package

Package: DO-41 molded plastic case (UL 94V-0), cathode indicated by band, lead finish: bright tin, weight ≈ 0.35 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point during conduction	Connected to AC source or transformer secondary; must handle full surge current path without trace fusing.
Cathode (banded end)	Forward current exit point; reverse voltage reference	Connected to output capacitor or load return; polarity marking critical for correct PCB orientation and EMI filtering layout.

Key Features

Feature	Design Value
Glass passivated die	Prevents moisture ingress and surface contamination, enabling reliable operation in humid industrial environments without conformal coating.
Diffused junction	Provides uniform electric field distribution, improving reverse voltage stability and reducing premature avalanche failure under transient stress.
30 A surge rating (8.3 ms)	Withstands cold-start inrush into bulk capacitors and line-voltage spikes per IEC 61000-4-5 Level 3 without degradation.
RoHS-compliant bright tin leads	Ensures solderability per MIL-STD-202 Method 208 and compatibility with lead-free reflow profiles up to 260°C peak.

Applications

AC-DC Adapter Input Rectification

DC Power Supply Auxiliary Bias Rail

Use Scenario: Full-wave bridge rectification of 12–24 VAC transformer output in wall-wart adapters.

IC Role / Device Role / Timing Role: Discrete rectifier conducting during positive half-cycles; paired with three identical devices in bridge configuration.

Use Value: 1.2 V V_FM limits conduction loss to <1.3 W at 1.0 A, enabling compact thermally unmanaged designs.

Use Scenario: Low-current DC bias generation for control ICs in offline flyback converters.

IC Role / Device Role / Timing Role: Half-wave rectifier feeding Zener-regulated 12 V rail for PWM controller startup and feedback circuitry.

Use Value: 200 ns t_rr prevents reverse recovery oscillation that could disrupt feedback loop stability at 65 kHz switching.

Industrial Sensor Power Conditioning

LED Driver Input Stage

Use Scenario: Rectifying 24 VAC supply for 4–20 mA loop-powered temperature sensors in factory automation.

IC Role / Device Role / Timing Role: Single-phase half-wave rectifier with smoothing capacitor; operates continuously at ≤0.3 A load.

Use Value: –65°C to +150°C operating range supports deployment in unheated enclosures and near motor drives.

Use Scenario: Input rectification in constant-current LED drivers with passive PFC.

IC Role / Device Role / Timing Role: First-stage rectifier converting 120/230 VAC to pulsating DC prior to buck converter stage.

Use Value: 50 V V_RRM provides sufficient margin over 36 V peak from 24 VAC sources used in low-voltage architectural lighting.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4933-T	Same electrical specs but non-glass-passivated construction; higher IR at elevated temperature.	Limited to dry, controlled environments; not recommended for outdoor or high-humidity deployments.	Select only if cost sensitivity outweighs long-term reliability in sealed indoor equipment.
FR103	Identical V_RRM (50 V), t_rr (200 ns), and I_O (1.0 A); same DO-41 package; RoHS-compliant.	No functional difference; validated drop-in replacement per ON Semiconductor datasheet FR101–FR107.	Preferred where second-source assurance or alternate inventory availability is required.

Compared with 1N4933G-T, 1N4933-T lacks glass passivation-increasing risk of parametric drift in humid conditions-while FR103 matches all key parameters and qualifies as a fully interchangeable alternative with identical thermal and switching behavior.

Availability

1N4933G-T is available at Aetrix Electronics and suitable for AC-DC adapter input rectification, LED driver input stages, industrial sensor power conditioning, and auxiliary bias rail generation requiring stable component supply and consistent DO-41 tape-and-reel delivery.

Supply support for 1N4933G-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-efficiency power management, signal integrity, and protection solutions.

The 1N493xG series belongs to Diodes' general-purpose fast recovery rectifier product line, engineered for cost-sensitive, high-volume AC/DC conversion where reliability, surge robustness, and thermal stability are prioritized over ultra-fast switching.

FAQ

Is 1N4933G-T suitable for 230 VAC input rectification?

No. With a 50 V peak repetitive reverse voltage rating, 1N4933G-T is rated only for ≤36 VAC RMS inputs. For 230 VAC applications, use 1N4937G-T (600 V V_RRM) or higher-rated alternatives to ensure safe voltage margin above 325 V peak.

What is the maximum ambient temperature for continuous 1.0 A operation?

1.0 A average forward current is rated at T_A = 75°C with 9.5 mm lead length. At 100°C ambient, derated current drops to approximately 0.75 A per Figure 1; operation above 75°C requires thermal analysis or forced cooling to avoid exceeding 150°C junction limit.

Does 1N4933G-T have a built-in thermal shutdown feature?

No. As a passive discrete diode, 1N4933G-T has no active thermal protection. Safe operation depends entirely on external thermal design-PCB copper area, lead length, airflow, and load duty cycle-to maintain T_J ≤ 150°C under worst-case conditions.

Can 1N4933G-T be used in place of a Schottky diode?

Only in non-critical, low-frequency applications where 1.2 V forward drop and 200 ns recovery are acceptable. Schottky diodes offer lower V_F (~0.3–0.5 V) and zero reverse recovery; substituting 1N4933G-T may increase conduction loss and EMI in high-efficiency or high-frequency designs.

1N4933G-T Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: DO-204AL, DO-41, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

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

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.2 V @ 1 A

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

Reverse Recovery Time (trr):: 200 ns

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

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-41

Operating Temperature - Junction:: -65°C ~ 150°C

1N4933G-T FAQ

1.How can I place an order for 1N4933G-T through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4933G-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 1N4933G-T reliable?

The price and inventory of 1N4933G-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4933G-T is usually 5 days.

3.What payment methods are accepted for 1N4933G-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4933G-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4933G-T?

1N4933G-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4933G-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 1N4933G-T?

For technical support, including 1N4933G-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4933G-T requirements.

6.How does Aetrix verify that 1N4933G-T is sourced from the original manufacturer or authorized distributors?

All 1N4933G-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 1N4933G-T meets industry standards.

7.What is the process for return or replacement of 1N4933G-T?

All 1N4933G-T units undergo pre-shipment inspection (PSI). If there is an issue with 1N4933G-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 1N4933G-T part is unused and in its original packaging.

Return procedure for 1N4933G-T:

1.Submit a request within 90 days.

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

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