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Diodes Incorporated 1N4935G-T
- Part No.:
- 1N4935G-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4935G-T.pdf
- Description:
- DIODE GEN PURP 200V 1A DO41
- Quantity:
- Payment:
- Shipping:
Inventory:7,236
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Product details
Overview
1N4935G-T from Diodes Incorporated is a 1.0A fast recovery glass passivated rectifier diode with 200V peak repetitive reverse voltage (VRRM), 1.2V forward voltage at 1.0A, and 200ns reverse recovery time (trr), used in AC/DC input stage rectification for offline power supplies and DC-DC converter front-ends.
For engineers reviewing the 1N4935G-T datasheet, 1N4935G-T pinout, 1N4935G-T application, or 1N4935G-T equivalent, key selection criteria include VRRM derating margin, trr-driven switching loss in high-frequency converters, thermal resistance (RθJA = 100 K/W), and surge capability (IFSM = 30A) under line transient conditions.
Technical Context
This DO-41 packaged silicon rectifier employs a diffused junction and glass passivation to achieve stable fast recovery performance across -65°C to +150°C operating range. Its 200ns trr enables efficient operation up to ~100kHz switching frequencies in flyback and forward converters.
The device delivers 1.0A average rectified output current at TA = 75°C with 1.2V VF at 1.0A, and sustains non-repetitive 30A surge current (8.3ms half-sine) - critical for handling inrush and lightning-induced transients in industrial AC inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Maximum peak reverse voltage the diode blocks without breakdown; sets minimum insulation margin for 120/230VAC input designs. |
| IF(AV) | 1.0 A at TA = 75°C - Continuous DC output current capability when leads are held at ambient at 9.5mm from case; defines thermal design baseline. |
| VF | 1.2 V @ IF = 1.0A - Forward conduction loss directly impacts efficiency and heatsink sizing in linear and switching rectifiers. |
| trr | 200 ns - Reverse recovery time determines switching loss and EMI generation during turn-off in high-frequency SMPS. |
| IFSM | 30 A (8.3ms half-sine) - Surge rating validates robustness against cold-start inrush and AC line spikes without failure. |
| RθJA | 100 K/W - Junction-to-ambient thermal resistance under standard PC board mounting; guides PCB copper area and airflow requirements. |
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 | Positive input terminal for forward conduction | Connected to AC source or transformer secondary; carries full load current during positive half-cycle. |
| Cathode | Negative output terminal / reverse-blocking node | Connected to output capacitor or downstream circuit; must withstand full VRRM during negative half-cycle. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die construction | Enhances surface stability and long-term reliability under humid or thermally cycled environments. |
| Diffused junction | Provides controlled carrier lifetime for consistent trr and low leakage across temperature and process variation. |
| Surge overload rating: 30A peak | Enables use without additional inrush limiting in cost-sensitive AC-DC adapters and industrial power modules. |
| RoHS-compliant lead finish | Bright tin plating ensures solderability per MIL-STD-202 Method 208 and supports lead-free reflow profiles. |
Applications
| AC-DC Adapter Input Rectification | Industrial DC Power Supply Front-End |
|---|---|
Use Scenario: 120VAC/230VAC input rectification in wall-wart adapters rated ≤15W. IC Role / Device Role / Timing Role: Unidirectional current steering element converting AC to pulsating DC; no timing function. Use Value: 1.2V VF minimizes conduction loss at 1A load; 200V VRRM provides 2× safety margin over 120VAC peak (170V). | Use Scenario: Primary-side rectification in DIN-rail mounted 24V/48V industrial PSUs. IC Role / Device Role / Timing Role: High-reliability discrete rectifier handling continuous 1A output with repeated line surges. Use Value: 30A IFSM withstands EN 61000-4-5 level 3 surges; DO-41 package allows through-hole mounting on thick copper PCBs. |
| DC-DC Converter Flyback Output | LED Driver Secondary-Side Rectification |
Use Scenario: Secondary-side rectification in isolated 12V/2A flyback converters for embedded controllers. IC Role / Device Role / Timing Role: Synchronous rectification alternative where cost sensitivity outweighs efficiency gain. Use Value: 200ns trr limits switching loss at 65kHz operation; RθJA = 100 K/W permits natural convection cooling. | Use Scenario: Output rectification in constant-current LED drivers for street lighting. IC Role / Device Role / Timing Role: Low-cost, rugged rectifier delivering stable DC to LED string with minimal maintenance. Use Value: -65°C to +150°C operating range supports outdoor thermal cycling; glass passivation prevents moisture-induced leakage drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4935RLG | Same electrical specs; DO-41 package but bulk packaging (1K bag), not tape-and-reel. | No difference in circuit function; unsuitable for automated pick-and-place assembly. | Select 1N4935G-T for SMT line compatibility; choose 1N4935RLG only for hand-soldered prototyping or low-volume repair. |
| STTH1L06 | Higher VRRM (600V), lower VF (1.05V), faster trr (50ns), TO-220AC package. | Requires heatsink mounting; over-spec'd for 200V applications but enables future-proofing or higher-temp operation. | Prefer STTH1L06 only when thermal budget is tight or system requires >200V isolation margin; adds cost and board space. |
Compared with 1N4935G-T, 1N4935RLG offers identical performance in manual assembly contexts but lacks tape-and-reel support, while STTH1L06 trades DO-41 simplicity for superior speed and voltage headroom at the cost of thermal management complexity and footprint.
Availability
1N4935G-T is available at Aetrix Electronics and suitable for AC-DC adapter input rectification, industrial DC power supply front-ends, and LED driver secondary-side rectification requiring stable component supply and RoHS-compliant sourcing.
Supply support for 1N4935G-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, cost-optimized components for power management and signal integrity.
The 1N4933G–1N4937G series targets cost-sensitive, high-volume power conversion applications where fast recovery, surge robustness, and DO-41 manufacturability are prioritized over ultra-low VF or sub-100ns trr.
FAQ
What is the maximum allowable ambient temperature for continuous 1.0A operation?
The 1N4935G-T delivers 1.0A average forward current only when ambient temperature is maintained at ≤75°C with leads held at ambient at 9.5mm from the case. At 100°C ambient, derated current drops to approximately 0.7A per Figure 1 in the datasheet.
Can this diode replace a 1N4007 in a 230VAC input circuit?
No - the 1N4935G-T has VRRM = 200V, insufficient for 230VAC (peak ≈ 325V). A 1N4937G (600V) or 1N4007 (1000V) is required. The 1N4935G-T is appropriate only for 120VAC-derived circuits or DC-DC outputs where reverse voltage remains below 200V.
Is the DO-41 package compatible with wave soldering and reflow processes?
Yes - the DO-41 package uses bright tin-plated leads compliant with MIL-STD-202 Method 208, supporting both wave soldering and lead-free reflow profiles. Thermal mass and lead spacing meet IPC-J-STD-020D Level 1 moisture sensitivity requirements.
How does reverse recovery time affect EMI in a 65kHz flyback converter?
A 200ns trr causes measurable high-frequency ringing during diode turn-off, contributing to conducted EMI above 30MHz. Layout optimization (short traces, ground plane, snubber) is essential; for stricter EMI limits, consider <100ns trr devices like STTH1R06.
1N4935G-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):
- 200 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 @ 200 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
- Operating Temperature - Junction:
- -65°C ~ 150°C
1N4935G-T FAQ
1.How can I place an order for 1N4935G-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4935G-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 1N4935G-T reliable?
The price and inventory of 1N4935G-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4935G-T is usually 5 days.
3.What payment methods are accepted for 1N4935G-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4935G-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4935G-T?
1N4935G-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4935G-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 1N4935G-T?
For technical support, including 1N4935G-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4935G-T requirements.
6.How does Aetrix verify that 1N4935G-T is sourced from the original manufacturer or authorized distributors?
All 1N4935G-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 1N4935G-T meets industry standards.
7.What is the process for return or replacement of 1N4935G-T?
All 1N4935G-T units undergo pre-shipment inspection (PSI). If there is an issue with 1N4935G-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 1N4935G-T part is unused and in its original packaging.
Return procedure for 1N4935G-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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