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Diodes Incorporated 1N4936L-T
- Part No.:
- 1N4936L-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4936L-T.pdf
- Description:
- DIODE GEN PURP 400V 1A DO41
- Quantity:
- Payment:
- Shipping:
Inventory:9,911
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Product details
Overview
1N4936L-T from Diodes Incorporated is a 1.0A fast recovery rectifier diode in DO-41 package, rated for 400V 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 switch-mode power supplies.
For engineers reviewing the 1N4936L-T datasheet, 1N4936L-T pinout, 1N4936L-T application, or 1N4936L-T equivalent, key selection criteria include VRRM derating for capacitive loads, thermal resistance (100°C/W), surge capability (30A @ 8.3ms), low IRM (5.0µA @ 25°C), and DO-41 mechanical compatibility with through-hole PCB layouts.
Technical Context
This discrete silicon PN junction diode uses diffused junction technology to achieve fast switching performance while maintaining high surge tolerance. Its 200ns reverse recovery time enables efficient operation in 50/60Hz and higher-frequency rectifier topologies up to ~20kHz without excessive switching loss.
The device operates across –65°C to +150°C junction temperature range and exhibits low reverse leakage (5.0µA typical at 25°C, 100µA at 100°C) and stable 1.2V forward drop at rated 1.0A DC output current under standard test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum repetitive reverse voltage before breakdown; sets safe operating limit for AC line input rectification. |
| IO @ TA=75°C | 1.0 A - Continuous average forward current rating at 75°C ambient; requires heatsinking or airflow above this temperature. |
| VFM @ IF=1.0A | 1.2 V - Forward voltage drop determining conduction loss (1.2W dissipation at 1.0A). |
| tRR | 200 ns - Reverse recovery time defining minimum off-time in high-frequency switching; limits usable frequency range. |
| IFSM | 30 A - Non-repetitive surge current handling for inrush protection during cold-start of power supplies. |
| IRM @ 25°C | 5.0 µA - Reverse leakage current affecting standby power and high-impedance bias networks. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; defines temperature rise per watt under free-air conditions. |
Pinout & Package
Package: DO-41 molded plastic case (UL 94V-0), axial leads with cathode band marking. Weight ≈ 0.35 g. Moisture sensitivity level 1 (J-STD-020).
| 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. |
| Cathode | Forward current exit point | Connected to bulk capacitor or downstream converter; marked by band; carries full load current and reverse blocking voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Fast recovery time | 200 ns - Enables use in higher-frequency rectifier stages than standard 1N400x series, reducing switching loss. |
| High surge rating | 30 A peak (8.3 ms half-sine) - Supports robust inrush current handling in unregulated AC/DC front-ends. |
| Low forward voltage | 1.2 V @ 1.0A - Minimizes conduction loss and thermal stress in compact power supply designs. |
| RoHS-compliant finish | Bright tin-plated leads - Ensures solderability per MIL-STD-202 Method 208 and environmental compliance. |
Applications
| AC/DC Power Adapter Input Stage | Industrial Control Power Supply |
|---|---|
Use Scenario: Rectifying 50/60Hz AC mains into DC for wall adapters powering consumer electronics. IC Role / Device Role / Timing Role: Discrete power diode performing half-wave or full-wave bridge rectification. Use Value: 400V VRRM safely handles 230VAC line peaks with margin; 1.0A IO supports up to 12W output at 80% efficiency. | Use Scenario: Providing isolated DC bus for PLC I/O modules and motor control logic. IC Role / Device Role / Timing Role: Primary-side rectifier in flyback or forward converter auxiliary winding supply. Use Value: 30A IFSM withstands repeated cold-start surges; 100°C/W RθJA allows operation in 70°C cabinet environments. |
| LED Driver Bulk Capacitor Charging | UPS Battery Charger Front-End |
Use Scenario: Charging bulk electrolytic capacitor after bridge rectifier in constant-current LED drivers. IC Role / Device Role / Timing Role: Individual leg in discrete bridge configuration or single-phase output rectifier. Use Value: 200ns tRR reduces ringing and EMI during capacitor charging transitions; low IRM prevents capacitor self-discharge. | Use Scenario: Converting utility AC to DC for battery float charging and inverter input in line-interactive UPS. IC Role / Device Role / Timing Role: Main rectifier in dual-stage AC/DC conversion with PFC pre-regulator. Use Value: 400V rating accommodates 230VAC ±10% variation; DO-41 package enables manual rework and field replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RS1J-T | Same 400V VRRM, but 1.3V VFM (vs. 1.2V), 500ns tRR (vs. 200ns), lower IRM (1.0µA) | Higher recovery time limits use in >10kHz topologies; better leakage for low-power standby circuits | Select RS1J-T when leakage-critical and switching frequency <5kHz; prefer 1N4936L-T for faster recovery. |
| 1N4936G | Identical electrical specs, but green (halogen-free) molding compound and RoHS-compliant plating per Diodes Inc. spec | No functional difference; intended for environmentally regulated industrial OEMs requiring halogen-free certification | Choose 1N4936G for compliance-driven programs; 1N4936L-T remains optimal for cost-sensitive general-purpose use. |
Compared with RS1J-T, 1N4936L-T delivers 300ns faster recovery for reduced switching loss in mid-frequency SMPS, while 1N4936G offers identical performance with halogen-free packaging - making the L-T variant the balanced choice for mainstream industrial rectification where speed and cost both matter.
Availability
1N4936L-T is available at Aetrix Electronics and suitable for AC/DC power adapters, industrial control power supplies, LED driver front-ends, and UPS battery charger circuits requiring stable component supply and long-term manufacturability.
Supply support for 1N4936L-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 1N4933–1N4937 series belongs to Diodes' general-purpose fast recovery rectifier product line, engineered specifically for cost-effective, reliable AC/DC conversion in consumer, industrial, and computing power supplies.
FAQ
Is 1N4936L-T suitable for use in a 230VAC input bridge rectifier?
Yes - its 400V peak repetitive reverse voltage (VRRM) provides 1.73× margin over the 325V peak of 230VAC RMS, satisfying standard derating requirements for reliability. It must be used in a full-wave bridge configuration with appropriate heatsinking if continuous current exceeds 0.7A at elevated ambient temperatures.
How does 1N4936L-T differ from standard 1N4007 diodes?
Unlike the 1N4007 (1000V VRRM, 30µs tRR), the 1N4936L-T offers faster recovery (200ns vs. 30µs), lower forward voltage (1.2V vs. 1.0V at 1A), and higher surge rating (30A vs. 30A), but lower voltage rating. It targets higher-efficiency, higher-frequency rectification where switching loss matters more than ultra-high voltage standoff.
Can 1N4936L-T be mounted on a PCB with automated through-hole assembly?
Yes - the DO-41 package has standardized axial lead spacing and conforms to IPC-7351B footprint guidelines. Its 0.35g weight and UL 94V-0 mold compound support wave soldering and selective soldering processes; lead finish meets MIL-STD-202 Method 208 for solderability.
What is the maximum allowable junction temperature during continuous operation?
The absolute maximum junction temperature is +150°C, but sustained operation above +125°C requires active cooling or significant derating of IO. At 75°C ambient, the rated 1.0A IO assumes 9.5mm lead length and free-air convection; exceeding this ambient requires thermal modeling using RθJA = 100°C/W.
1N4936L-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 15pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
- Operating Temperature - Junction:
- -65°C ~ 150°C
1N4936L-T FAQ
1.How can I place an order for 1N4936L-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4936L-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 1N4936L-T reliable?
The price and inventory of 1N4936L-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4936L-T is usually 5 days.
3.What payment methods are accepted for 1N4936L-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4936L-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4936L-T?
1N4936L-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4936L-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 1N4936L-T?
For technical support, including 1N4936L-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4936L-T requirements.
6.How does Aetrix verify that 1N4936L-T is sourced from the original manufacturer or authorized distributors?
All 1N4936L-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 1N4936L-T meets industry standards.
7.What is the process for return or replacement of 1N4936L-T?
All 1N4936L-T units undergo pre-shipment inspection (PSI). If there is an issue with 1N4936L-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 1N4936L-T part is unused and in its original packaging.
Return procedure for 1N4936L-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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