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Diodes Incorporated 1N4935-T
- Part No.:
- 1N4935-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4935-T.pdf
- Description:
- DIODE GEN PURP 200V 1A DO41
- Quantity:
- Payment:
- Shipping:
Inventory:11,794
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Product details
Overview
1N4935-T from Diodes Incorporated is a 1.0A fast recovery rectifier diode in DO-41 package, rated for 200V peak repetitive reverse voltage (VRRM), 1.2V forward voltage drop at 1.0A, and 200ns reverse recovery time - used in AC/DC input stage rectification for offline power supplies and auxiliary power rails.
For engineers reviewing the 1N4935-T datasheet, 1N4935-T pinout, 1N4935-T application, or 1N4935-T equivalent, key selection criteria include VRRM derating for capacitive loads, thermal resistance (100°C/W) in PCB-mounted configuration, surge capability (30A @ 8.3ms), and RoHS-compliant bright tin-plated leads.
Technical Context
This discrete silicon rectifier uses a diffused junction to achieve fast switching with low stored charge, enabling high-efficiency operation in 50/60Hz and higher-frequency line-frequency rectification circuits. Its 200ns tRR and 15pF typical capacitance support stable performance in flyback snubber networks and low-noise auxiliary supplies.
The device operates across –65°C to +150°C with 5.0μA max reverse leakage at 25°C and 100μA at 100°C, and requires no heatsink below 75°C ambient when mounted with 9.5mm lead length per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Maximum repetitive reverse blocking voltage; sets minimum insulation margin for 120/230VAC input designs. |
| IF(AV) | 1.0 A @ TA = +75°C - Average forward current rating; defines continuous DC output capability in unregulated rectifier stages. |
| VFM | 1.2 V @ IF = 1.0A - Forward voltage drop; determines conduction loss and thermal rise in linearly scaled power dissipation. |
| tRR | 200 ns - Reverse recovery time; limits switching frequency suitability and EMI generation in transformer-coupled topologies. |
| IFSM | 30 A @ 8.3ms - Non-repetitive surge rating; withstands inrush currents during cold-start of capacitive-input supplies. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; used to calculate temperature rise in standard PCB mounting (9.5mm lead length). |
Pinout & Package
Package: DO-41 molded plastic case (UL 94V-0), axial leaded, cathode indicated by band. Weight ≈ 0.35g. Moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to AC source or transformer secondary winding; polarity-sensitive for correct rectification direction. |
| Cathode | Forward current exit / reverse blocking terminal | Marked with band; ties to positive rail; must sustain full VRRM during off-state in half-wave or full-wave bridge configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Fast recovery time | 200 ns - Enables use in higher-frequency rectification without excessive switching loss or ringing. |
| Low forward voltage | 1.2 V @ 1.0A - Reduces conduction loss by ~15% vs. standard 1N400x series, improving efficiency in low-voltage auxiliary rails. |
| 30A surge rating | Withstands single-cycle inrush into bulk capacitors up to 1000μF without degradation under standard test conditions. |
| RoHS-compliant finish | Bright tin-plated leads - Ensures solderability per MIL-STD-202 Method 208 and compatibility with lead-free reflow profiles. |
Applications
| AC/DC Adapter Input Rectification | Industrial Control Auxiliary Supply |
|---|---|
Use Scenario: Converting 120/230VAC mains to unregulated DC for isolated flyback controllers in wall adapters. IC Role / Device Role: Primary-side half-wave rectifier in capacitor-input configuration. Use Value: 200V VRRM provides 2× safety margin over 120VAC RMS; 30A IFSM handles cold-start surges into 47–100μF input caps. | Use Scenario: Generating +12V or +15V bias supply for PLC I/O modules operating in factory environments. IC Role / Device Role: Secondary-side rectifier feeding linear regulator or buck converter input. Use Value: 100°C/W RθJA allows operation up to +75°C ambient without heatsink; –65°C to +150°C TJ range supports extended industrial temperature compliance. |
| UPS Battery Charger Stage | LED Driver Bulk Rectification |
Use Scenario: Rectifying AC utility input during normal operation and charging sealed lead-acid batteries in line-interactive UPS units. IC Role / Device Role: Input bridge leg component (as part of discrete DO-41 bridge assembly). Use Value: Low 5.0μA IR at 25°C minimizes standby power loss; 200ns tRR reduces EMI coupling into sensitive battery sensing circuitry. | Use Scenario: High-reliability rectification in constant-current LED drivers for outdoor signage with wide ambient swings. IC Role / Device Role: Bulk DC feed rectifier preceding PWM controller and MOSFET switch. Use Value: 15pF CT limits high-frequency noise injection into gate drive paths; DO-41 mechanical robustness supports vibration-prone mounting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RS2M (DO-15) | Same 200V VRRM, 1.3V VFM, but 500ns tRR and 1.2A IF(AV); larger DO-15 package. | Higher surge rating (50A), better thermal performance (RθJA = 75°C/W), but longer lead time on some distributors. | Prefer RS2M for thermally constrained layouts requiring >1A average current or improved surge margin. |
| 1N4935G (DO-41, Green) | Identical electrical specs; halogen- and antimony-free "Green" variant with same DO-41 footprint and marking. | No functional difference; selected only when strict halogen-free compliance is mandated by end-equipment standards. | Choose 1N4935G if RoHS 3 plus halogen-free certification (per Diodes Inc. definition) is contractually required. |
Compared with RS2M, the 1N4935-T offers tighter tRR and smaller footprint but lower surge and thermal margin; versus 1N4935G, it shares all performance while differing only in material composition - making the latter suitable solely for green-compliance-driven BOM updates.
Availability
1N4935-T is available at Aetrix Electronics and suitable for AC/DC adapter input rectification, industrial control auxiliary supply, UPS battery charger stage, and LED driver bulk rectification requiring stable component supply and long-term manufacturing continuity.
Supply support for 1N4935-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, serving automotive, industrial, computing, and consumer markets with high-reliability components.
The 1N4933–1N4937 series belongs to Diodes' general-purpose fast recovery rectifier product line, designed specifically for cost-sensitive, high-volume AC/DC front-end applications where efficiency, surge resilience, and regulatory compliance are prioritized over ultrafast switching.
FAQ
Is the 1N4935-T suitable for use in a capacitive-input filter?
Yes, but with 20% current derating per datasheet Note 4. At 1.0A average rating, maximum usable current drops to 0.8A in capacitive-input configurations to prevent overheating and premature failure due to increased RMS current stress.
What is the recommended PCB pad layout for DO-41 mounting?
Use standard axial-leaded DO-41 footprints with ≥2.5mm pad diameter, 9.5mm lead length between case and PCB, and ≥1.5mm clearance to adjacent copper. Avoid thermal reliefs on pads to maximize heat conduction through leads per JEDEC JESD51-2.
Does the 1N4935-T require derating at elevated ambient temperatures?
Yes - Figure 1 shows linear derating from 1.0A at +75°C to zero at +175°C. At +100°C ambient, maximum average current is 0.75A. Derating applies only to IF(AV); VRRM and IFSM remain unchanged per datasheet limits.
Can the 1N4935-T replace a 1N4007 in an existing design?
Only if VRRM sufficiency is confirmed: 1N4935-T's 200V rating is insufficient for 1N4007's 1000V use cases (e.g., 230VAC full-wave). It may substitute in 120VAC half-wave or low-VRRM auxiliary rails where faster recovery and lower VF improve efficiency.
1N4935-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:
- 15pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
- Operating Temperature - Junction:
- -65°C ~ 150°C
1N4935-T FAQ
1.How can I place an order for 1N4935-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4935-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 1N4935-T reliable?
The price and inventory of 1N4935-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4935-T is usually 5 days.
3.What payment methods are accepted for 1N4935-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4935-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4935-T?
1N4935-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4935-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 1N4935-T?
For technical support, including 1N4935-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4935-T requirements.
6.How does Aetrix verify that 1N4935-T is sourced from the original manufacturer or authorized distributors?
All 1N4935-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 1N4935-T meets industry standards.
7.What is the process for return or replacement of 1N4935-T?
All 1N4935-T units undergo pre-shipment inspection (PSI). If there is an issue with 1N4935-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 1N4935-T part is unused and in its original packaging.
Return procedure for 1N4935-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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