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Diodes Incorporated DL4935-13-F
- Part No.:
- DL4935-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
DL4935-13-F.pdf
- Description:
- DIODE GEN PURP 200V 1A MELF
- Quantity:
- Payment:
- Shipping:
Inventory:6,653
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Product details
Overview
DL4935-13-F from Diodes Incorporated is a 200 V peak repetitive reverse voltage, 1.0 A average forward rectified current, surface-mount fast recovery rectifier in MELF package, with 1.2 V max forward voltage at 1.0 A and 200 ns maximum reverse recovery time, used in AC/DC input stage rectification for industrial power supplies and LED drivers.
For engineers reviewing the DL4935-13-F datasheet, DL4935-13-F pinout, DL4935-13-F application, or DL4935-13-F equivalent, key selection criteria include reverse voltage rating, surge current capability (30 A), thermal derating behavior, and MELF package compatibility with high-reliability automated assembly.
Technical Context
This device is a single-phase, half-wave silicon rectifier optimized for fast switching in line-frequency and low-frequency SMPS front-end stages. Its 200 ns reverse recovery time and 15 pF typical junction capacitance support reduced switching losses and EMI in 50/60 Hz and <1 kHz applications.
Designed for operation up to +150°C junction temperature, it features glass passivation for low leakage (5.0 µA max IR at rated VR) and stable forward conduction (1.2 V VF @ 1.0 A), with thermal derating defined down to zero current at +175°C terminal temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Maximum repetitive reverse blocking voltage; defines safe AC input peak handling in bridge or half-wave configurations. |
| IO @ TT=75°C | 1.0 A - Continuous forward current rating at 75°C terminal temperature; sets baseline conduction capacity under standard heatsink conditions. |
| IFSM | 30 A - Non-repetitive surge current for 8.3 ms half-sine; determines inrush withstand in capacitor-input rectifiers. |
| VFM @ IF=1.0A | 1.2 V - Forward voltage drop at rated DC current; directly impacts conduction loss and thermal rise in linear rectification. |
| trr | 200 ns - Reverse recovery time under IF=1.0A, VR=30V, di/dt=50 A/µs; limits switching frequency suitability and commutation loss. |
| IRM | 5.0 µA - Max DC reverse leakage at rated blocking voltage; critical for high-impedance hold-up or sensing circuits. |
| Tj Range | –65°C to +150°C - Operating junction temperature range; enables deployment in extended-temperature industrial and automotive under-hood environments. |
Pinout & Package
Package: MELF (Metal Electrode Leadless Face), cylindrical glass-passivated surface-mount package with cathode band marking; UL 94V-0 rated molded plastic body; 0.25 g typical weight; dimensions A: 4.80–5.20 mm, B: 2.60–2.64 mm, C: 0.55 mm nominal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to AC source or transformer secondary; must withstand full surge current and reverse voltage stress during off-state. |
| Cathode | Forward current exit point | Marked by band; ties to output rail or smoothing capacitor; carries full load current and defines reference for reverse biasing. |
Key Features
| Feature | Design Value |
|---|---|
| Fast recovery time | 200 ns trr enables lower switching loss than standard rectifiers in 50/60 Hz–1 kHz applications. |
| Glass passivated junction | Reduces surface leakage and improves long-term reliability under humid or contaminated operating conditions. |
| Low forward voltage | 1.2 V VF at 1.0 A minimizes I²R conduction loss and thermal loading in compact power designs. |
| MELF package | Provides superior thermal dissipation vs. SOD-123 and supports high-reliability reflow profiles with no lead coplanarity issues. |
| RoHS-compliant finish | Matte tin plating meets EU Directive 2002/95/EC with exemptions for high-temp solder and glass, enabling global compliance without performance trade-off. |
Applications
| AC-DC Power Adapter Input Stage | Industrial LED Driver Rectification |
|---|---|
Use Scenario: Half-wave rectification of 120/230 VAC mains in compact wall adapters with minimal heatsinking. IC Role / Device Role / Timing Role: Primary-side unidirectional current switch; conducts during positive half-cycle and blocks reverse voltage during negative half-cycle. Use Value: 200 V VRRM safely handles 170 V peak 120 VAC and 325 V peak 230 VAC inputs; 30 A IFSM absorbs cold-start inrush into bulk capacitors. | Use Scenario: Output rectification in isolated flyback LED drivers powering streetlights or high-bay fixtures. IC Role / Device Role / Timing Role: Secondary-side freewheeling path for transformer energy transfer; operates at line frequency with low conduction loss. Use Value: 1.2 V VF reduces power loss in continuous conduction mode; MELF package withstands thermal cycling in outdoor-rated enclosures. |
| Capacitor-Input Filter Stage | High-Reliability Sensor Power Supply |
Use Scenario: Rectification feeding large electrolytic input capacitors in industrial PLC power modules. IC Role / Device Role / Timing Role: Conducts short-duration high-current pulses during capacitor recharge; blocks reverse voltage between pulses. Use Value: 30 A IFSM accommodates repeated capacitor charging surges; 200 ns trr limits reverse recovery charge (Qrr) and associated losses. | Use Scenario: Low-leakage rectification in battery-backed sensor nodes requiring >10-year shelf life. IC Role / Device Role / Timing Role: Isolation diode preventing backfeed from backup battery into main supply rail. Use Value: 5.0 µA max IR ensures negligible standby drain; –65°C to +150°C Tj range supports operation in unheated outdoor sensor housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1L06S | Same 200 V VRRM, but TO-277 package (SMD DPAK); 1.3 V VF @ 1.0 A; 150 ns trr. | Higher thermal mass but larger footprint; better suited for higher ambient temperatures with PCB copper pour. | Select when board space allows larger package and thermal management prioritizes steady-state over surge. |
| ES1J | Same MELF form factor; 600 V VRRM; 1.7 V VF @ 1.0 A; 35 ns trr. | Higher voltage rating trades off higher VF and lower surge rating (25 A IFSM); optimized for snubberless flyback. | Select when system requires >400 V peak input or faster recovery, accepting higher conduction loss. |
Compared with STTH1L06S and ES1J, DL4935-13-F offers the best balance of low VF, robust surge rating, and compact MELF footprint for 230 VAC-fed industrial power supplies where space and thermal cycling reliability are critical.
Availability
DL4935-13-F is available at Aetrix Electronics and suitable for AC/DC power adapters, industrial LED drivers, capacitor-input filter stages, and high-reliability sensor power supplies requiring stable component supply across multi-year production cycles.
Supply support for DL4935-13-F 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, manufacturing, and sales operations across Asia, Europe, and North America.
The DL4933–DL4937 series targets cost-sensitive, high-volume industrial and consumer power conversion applications requiring reliable, RoHS-compliant fast recovery rectifiers in standardized MELF packaging.
FAQ
What is the maximum allowable junction temperature for DL4935-13-F?
The absolute maximum junction temperature is +150°C, with continuous operation permitted across the full –65°C to +150°C range. Derating begins at +75°C terminal temperature, where IO drops linearly to zero at +175°C per Figure 2 in DS15001 Rev. 5–2.
Can DL4935-13-F be used in full-wave bridge configurations?
No - DL4935-13-F is a single-anode/cathode device intended for half-wave or individual leg use in discrete bridges. For full-wave bridge applications, four DL4935-13-F units may be assembled externally, but dedicated bridge packages (e.g., DB107S) offer better thermal and layout efficiency.
Is the MELF package compatible with standard reflow soldering profiles?
Yes - the MELF package is qualified for lead-free reflow per J-STD-020, with peak temperature up to 260°C for ≤60 seconds. Its symmetric geometry eliminates tombstoning risk, and the matte tin finish ensures consistent wetting on OSP- or ENIG-finished PCBs.
How does capacitive load affect DL4935-13-F current rating?
Per datasheet note, average forward current must be derated by 20% under capacitive load conditions due to increased peak current stress during capacitor charging. For example, IO is limited to 0.8 A instead of 1.0 A when feeding a bulk capacitor directly from AC line.
DL4935-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-213AB, MELF (Glass)
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- 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:
- Surface Mount
- Supplier Device Package:
- MELF
- Operating Temperature - Junction:
- -65°C ~ 150°C
DL4935-13-F FAQ
1.How can I place an order for DL4935-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DL4935-13-F 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 DL4935-13-F reliable?
The price and inventory of DL4935-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DL4935-13-F is usually 5 days.
3.What payment methods are accepted for DL4935-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DL4935-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DL4935-13-F?
DL4935-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DL4935-13-F 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 DL4935-13-F?
For technical support, including DL4935-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DL4935-13-F requirements.
6.How does Aetrix verify that DL4935-13-F is sourced from the original manufacturer or authorized distributors?
All DL4935-13-F 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 DL4935-13-F meets industry standards.
7.What is the process for return or replacement of DL4935-13-F?
All DL4935-13-F units undergo pre-shipment inspection (PSI). If there is an issue with DL4935-13-F, 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 DL4935-13-F part is unused and in its original packaging.
Return procedure for DL4935-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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