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Diodes Incorporated 1N4936G-T
- Part No.:
- 1N4936G-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4936G-T.pdf
- Description:
- DIODE GEN PURP 400V 1A DO41
- Quantity:
- Payment:
- Shipping:
Inventory:5,051
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Product details
Overview
1N4936G-T from Diodes Incorporated is a 1.0A fast recovery glass passivated rectifier diode with 400V peak repetitive reverse voltage (VRRM), 1.2V forward voltage at 1.0A, and 200ns reverse recovery time - used in AC/DC input stage rectification, flyback snubber circuits, and offline power supply front-ends.
For engineers reviewing the 1N4936G-T datasheet, 1N4936G-T pinout, 1N4936G-T application, or 1N4936G-T equivalent, key selection criteria include VRRM derating for capacitive loads, thermal management under 75°C ambient, surge capability up to 30A, and DO-41 lead-form compatibility with through-hole PCB layouts.
Technical Context
This discrete rectifier employs a diffused junction and glass passivated die construction to achieve fast switching (trr = 200ns) and low conduction loss (VFM = 1.2V @ 1.0A), enabling high-efficiency operation in 50–60Hz line-frequency applications.
It supports single-phase half-wave rectification with 1.0A average output current at TA = 75°C, and withstands non-repetitive 30A surge currents (8.3ms half-sine), making it suitable for transient-heavy mains-input stages where reliability under overload is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400V - Maximum peak reverse voltage before breakdown; sets safe operating limit for 230VAC input with margin. |
| IO @ TA=75°C | 1.0A - Continuous DC output current rating when leads are held at ambient at 9.5mm from case. |
| VFM @ IF=1.0A | 1.2V - Forward conduction loss per diode; determines power dissipation (1.2W at 1.0A). |
| trr | 200ns - Reverse recovery time; limits minimum switching frequency and reduces switching loss in quasi-resonant designs. |
| IFSM | 30A - Non-repetitive surge rating; enables survival during cold-start inrush or lightning-induced transients. |
| RθJA | 100K/W - Junction-to-ambient thermal resistance; requires heatsinking or layout derating above ~0.5A continuous. |
Pinout & Package
Package: DO-41 molded plastic case (UL 94V-0), axial-leaded, cathode band marked on body. Weight: 0.35g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Current entry point during forward conduction | Connected to AC source or transformer secondary side; must handle full surge current path. |
| Cathode (Lead 2, banded end) | Current exit point during forward conduction | Connected to bulk capacitor or load return; polarity marking ensures correct orientation in bridge or half-wave layout. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Enhances moisture resistance and long-term reliability in humid industrial environments without conformal coating. |
| Diffused junction | Improves softness of reverse recovery, reducing EMI generation compared to abrupt-junction fast diodes. |
| RoHS-compliant bright tin plating | Ensures solderability per MIL-STD-202 Method 208 and eliminates lead-based contamination in final assembly. |
| 30A surge rating | Supports repeated cold-start cycles in consumer power adapters without degradation or failure. |
Applications
| AC/DC Input Rectification | Flyback Converter Snubber |
|---|---|
Use Scenario: Converting 115/230VAC mains to unregulated DC in offline SMPS. IC Role / Device Role / Timing Role: Discrete rectifier conducting during positive half-cycles; paired with bulk capacitor for energy storage. Use Value: 400V VRRM provides 2× safety margin over 230VAC peak (325V), while 1.2V VFM minimizes conduction loss at 1A load. | Use Scenario: Clamping voltage spikes across primary-side MOSFET in discontinuous-mode flyback converters. IC Role / Device Role / Timing Role: Fast recovery diode in RCD snubber network, absorbing leakage inductance energy. Use Value: 200ns trr ensures timely turn-off before next switching cycle, preventing snubber inefficiency and MOSFET overstress. |
| Capacitor-Input Filter Stage | Industrial Control Power Supply |
Use Scenario: Feeding high-capacitance input filters in motor drive auxiliary supplies. IC Role / Device Role / Timing Role: Rectifying transformer output into large electrolytic bank; subjected to high inrush current. Use Value: 30A IFSM withstands repeated capacitor charging surges without bond-wire fusing or junction damage. | Use Scenario: Providing isolated 24VDC bias for PLC I/O modules operating in factory-floor environments. IC Role / Device Role / Timing Role: Primary-side rectifier in compact, fanless 5W auxiliary supply with extended temperature range. Use Value: -65°C to +150°C TJ/TSTG rating ensures stable operation in uncontrolled ambient conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4936RLG | Same electrical specs; DO-41 package with radial lead form (not axial); RoHS-compliant. | Requires different PCB footprint and pick-and-place tooling; not drop-in compatible. | Select when automated assembly uses radial tape carriers or space-constrained board layouts demand shorter lead span. |
| FR106 | 400V VRRM, 1.0A IO, but trr = 500ns and VFM = 1.7V - slower and higher loss. | Acceptable only in low-frequency (<1kHz), low-efficiency designs where EMI and thermal rise are non-critical. | Choose only if cost sensitivity outweighs efficiency and thermal performance requirements. |
Compared with 1N4936RLG and FR106, the 1N4936G-T offers optimal balance of surge robustness, thermal resistance, and fast recovery for cost-sensitive yet reliable 1A rectification - especially where axial DO-41 mounting and 200ns trr are design-critical.
Availability
1N4936G-T is available at Aetrix Electronics and suitable for AC/DC input rectification, flyback snubber networks, and industrial control power supplies requiring stable component supply and long-lifecycle support.
Supply support for 1N4936G-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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the US.
The 1N493xG series belongs to Diodes' general-purpose fast recovery rectifier product line, engineered for high-reliability, cost-effective AC/DC conversion in consumer, industrial, and computing power supplies.
FAQ
What is the maximum allowable ambient temperature for continuous 1.0A operation?
The 1N4936G-T delivers 1.0A average forward current only when leads are maintained at ambient temperature at a distance of 9.5mm from the case, and ambient temperature does not exceed 75°C. Above this, derating per Figure 1 applies - e.g., ~0.7A at 100°C ambient.
Can 1N4936G-T be used in capacitive-input filter circuits without derating?
No - the datasheet explicitly requires 20% current derating for capacitive loads due to higher peak currents. At full rated 1.0A average, the effective peak current exceeds 3A, increasing thermal stress and reducing reliability unless board layout and heatsinking compensate.
Is the 1N4936G-T suitable for high-frequency switching applications above 100kHz?
No - although its 200ns trr supports 60Hz–10kHz line-frequency rectification, it is not optimized for high-frequency SMPS (>50kHz). Its junction capacitance (15pF) and recovery characteristics cause excessive switching loss and EMI in such applications; ultrafast or Schottky alternatives are preferred.
Does the DO-41 package support automated through-hole insertion?
Yes - the DO-41 axial package with 0.71–0.864mm lead diameter and standard 25.4mm lead spacing is compatible with industry-standard axial component inserters and wave soldering fixtures, provided lead forming matches board hole pitch and tension specifications.
1N4936G-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):
- 400 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 @ 400 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
- Operating Temperature - Junction:
- -65°C ~ 150°C
1N4936G-T FAQ
1.How can I place an order for 1N4936G-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4936G-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 1N4936G-T reliable?
The price and inventory of 1N4936G-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4936G-T is usually 5 days.
3.What payment methods are accepted for 1N4936G-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4936G-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4936G-T?
1N4936G-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4936G-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 1N4936G-T?
For technical support, including 1N4936G-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4936G-T requirements.
6.How does Aetrix verify that 1N4936G-T is sourced from the original manufacturer or authorized distributors?
All 1N4936G-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 1N4936G-T meets industry standards.
7.What is the process for return or replacement of 1N4936G-T?
All 1N4936G-T units undergo pre-shipment inspection (PSI). If there is an issue with 1N4936G-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 1N4936G-T part is unused and in its original packaging.
Return procedure for 1N4936G-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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