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Diodes Incorporated 1N5400-B
- Part No.:
- 1N5400-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1N5400-B.pdf
- Description:
- DIODE GEN PURP 50V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:3,649
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Product details
Overview
1N5400-B from Diodes Incorporated is a 3.0A, 50V peak repetitive reverse voltage general-purpose silicon rectifier diode in DO-201AD package, featuring 1.0V forward voltage at 3.0A, 200A non-repetitive surge capability, and low 10µA reverse leakage at 25°C - used in AC/DC power supplies, battery chargers, and DC motor control circuits.
For engineers reviewing the 1N5400-B datasheet, 1N5400-B pinout, 1N5400-B application, or 1N5400-B equivalent, key selection criteria include its 3.0A average forward current rating at 105°C, 15°C/W junction-to-ambient thermal resistance, DO-201AD mechanical outline, and compliance with RoHS (lead-free tin-plated leads).
Technical Context
This axial-lead rectifier operates in single-phase, half-wave configurations with resistive or inductive loads at 60Hz; capacitive loads require 20% current derating. Its diffused junction enables stable high-current conduction and low forward voltage drop across temperature.
Thermal performance is defined by a 15°C/W junction-to-ambient resistance under standard mounting (leads held at ambient 9.5mm from case), and it maintains <100µA reverse leakage up to 150°C junction temperature - critical for reliability in unregulated power stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum peak reverse voltage the diode blocks without breakdown; sets minimum insulation margin in 35V RMS input designs. |
| IO @ TA=105°C | 3.0 A - Continuous average forward current capability when ambient is 105°C; defines usable output capacity in compact enclosures. |
| VFM @ IF=3.0A | 1.0 V - Forward voltage drop at rated current; determines ~3W conduction loss per device at full load. |
| IFSM (8.3ms) | 200 A - Non-repetitive surge rating; withstands inrush currents from transformer-coupled or capacitor-input supplies. |
| IRM @ 25°C | 10 µA - Reverse leakage at rated DC blocking voltage; ensures minimal standby power loss in high-impedance bias networks. |
| RθJA | 15 °C/W - Thermal resistance from junction to ambient; requires ≥1.1 cm² copper pad for safe 3A operation at 105°C ambient. |
Pinout & Package
Package: DO-201AD - molded plastic case (UL 94V-0), 1.1g weight, cathode band polarity marking, tin-plated leads solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to AC source or transformer secondary; must handle full surge current and thermal stress. |
| Cathode | Forward current exit / reverse voltage reference | Marked by band; ties to positive rail or filter capacitor; reverse voltage appears across this terminal relative to anode. |
Key Features
| Feature | Design Value |
|---|---|
| Diffused junction construction | Enables uniform current distribution and stable VF over life, reducing hot-spot risk during surge events. |
| 200A peak surge rating (8.3ms) | Supports reliable startup in transformer-fed supplies with high inrush, eliminating need for external NTC thermistors. |
| Low 10µA reverse leakage at 25°C | Minimizes standby power loss in battery-backed or energy-sensitive applications like UPS hold-up circuits. |
| DO-201AD package with tin-plated leads | Enables automated through-hole assembly and reflow compatibility while meeting RoHS Directive Annex exemptions. |
Applications
| AC/DC Power Supply Input Stage | Battery Charger Rectification |
|---|---|
Use Scenario: Full-wave or half-wave rectification of 12–24VAC transformer secondaries feeding unregulated DC rails. IC Role / Device Role / Timing Role: Primary power conversion element converting AC input to pulsating DC before filtering and regulation. Use Value: 3.0A continuous rating and 200A surge tolerance ensure robust operation during line transients and cold-start conditions. | Use Scenario: Low-cost linear charger for sealed lead-acid or NiCd batteries in backup lighting or alarm systems. IC Role / Device Role / Timing Role: Unidirectional current path enabling transformer-isolated DC output with minimal component count. Use Value: 1.0V VF limits conduction loss to ≤3W at 3A, preserving thermal headroom in enclosed plastic housings. |
| DC Motor Polarity Protection | Industrial Control Signal Conditioning |
Use Scenario: Reverse-polarity protection for 24VDC brushed motors in factory automation actuators. IC Role / Device Role / Timing Role: Series-blocking diode preventing damage from accidental battery reversal during maintenance. Use Value: 50V VRRM provides 2× margin over 24V nominal, while low leakage avoids false triggering in high-impedance feedback paths. | Use Scenario: Input protection and level-shifting in PLC I/O modules handling 24VDC sensor signals. IC Role / Device Role / Timing Role: Clamp and isolation element limiting fault current during field-wiring shorts or ESD events. Use Value: 15°C/W RθJA allows direct PCB mounting without heatsinks, simplifying layout in space-constrained DIN-rail modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5400-T | Same electrical specs; supplied in 1.2K tape-and-reel format instead of 500-piece bulk. | Optimized for automated SMT-compatible through-hole placement rather than manual or wave-solder assembly. | Select for high-volume production requiring pick-and-place compatibility and consistent reel logistics. |
| 1N5401-B | Identical package and thermal specs, but rated for 100V VRRM (vs. 50V) and 10µA IR at 100V. | Suitable for higher-input-voltage supplies (e.g., 70VAC transformer secondaries) where 50V margin is insufficient. | Choose when system-level transient immunity or legacy design reuse demands >50V reverse standoff. |
Compared with 1N5401-B, the 1N5400-B offers tighter VF consistency at lower voltage stress but requires careful input voltage validation; versus 1N5400-T, it trades assembly efficiency for lower MOQ flexibility and simplified inventory handling.
Availability
1N5400-B is available at Aetrix Electronics and suitable for AC/DC power supplies, battery chargers, and DC motor control circuits requiring stable component supply and long-term industrial availability.
Supply support for 1N5400-B 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 power management, signal integrity, and protection solutions for industrial and consumer markets.
The S3A–S3M series - including the 1N5400-B - was engineered for cost-sensitive, high-volume rectification tasks where ruggedness, thermal stability, and RoHS-compliant manufacturing are essential.
FAQ
Is the 1N5400-B suitable for use in capacitor-input filter circuits?
No - the datasheet explicitly states that for capacitive loads, the average forward current must be derated by 20%. At 3.0A rated IO, this reduces usable current to 2.4A. Designers should verify ripple current, peak inverse voltage, and thermal rise under actual capacitor-input conditions using Fig. 1 derating curves.
What is the maximum allowable junction temperature for continuous operation?
The 1N5400-B has an operating junction temperature range of –65°C to +150°C. For reliable long-term operation, junction temperature must remain ≤150°C - achievable only if ambient temperature, PCB copper area, and airflow comply with the 15°C/W RθJA condition (leads held at ambient 9.5mm from case).
Does the "NOT RECOMMENDED FOR NEW DESIGN" notice affect existing designs?
No - the notice indicates Diodes Incorporated no longer promotes the 1N5400-B for new product development due to newer alternatives (e.g., faster recovery or lower VF devices), but it remains fully supported for production, repair, and legacy design continuity with unchanged specifications and supply chain commitment.
How does the DO-201AD package differ from DO-41 in mechanical mounting?
DO-201AD has larger body dimensions (B: 7.2–9.5mm vs. DO-41's ~5.2mm) and longer leads, requiring wider PCB hole spacing and greater board clearance. Its higher thermal mass improves surge handling but reduces density; lead pitch is not standardized - designers must use the exact DS28007 Rev. 8 mechanical drawing for footprint layout.
1N5400-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 3 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 50 V
- Capacitance @ Vr, F:
- 50pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -65°C ~ 150°C
1N5400-B FAQ
1.How can I place an order for 1N5400-B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5400-B 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 1N5400-B reliable?
The price and inventory of 1N5400-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5400-B is usually 5 days.
3.What payment methods are accepted for 1N5400-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5400-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5400-B?
1N5400-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5400-B 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 1N5400-B?
For technical support, including 1N5400-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5400-B requirements.
6.How does Aetrix verify that 1N5400-B is sourced from the original manufacturer or authorized distributors?
All 1N5400-B 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 1N5400-B meets industry standards.
7.What is the process for return or replacement of 1N5400-B?
All 1N5400-B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5400-B, 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 1N5400-B part is unused and in its original packaging.
Return procedure for 1N5400-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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