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Diodes Incorporated PR1501S-T
- Part No.:
- PR1501S-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
PR1501S-T.pdf
- Description:
- DIODE GEN PURP 50V 1.5A DO41
- Quantity:
- Payment:
- Shipping:
Inventory:4,856
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Product details
Overview
PR1501S-T from Diodes Incorporated is a 1.5A fast recovery rectifier diode in DO-41 package, rated for 50V peak repetitive reverse voltage (VRRM), 1.2V forward voltage at 1.5A (VFM), and 150ns reverse recovery time (trr), used in AC/DC input stage rectification for low-power offline power supplies and auxiliary power rails.
For engineers reviewing the PR1501S-T datasheet, PR1501S-T pinout, PR1501S-T application, or PR1501S-T equivalent, key selection criteria include VRRM margin for surge tolerance, trr impact on switching loss in high-frequency flyback designs, thermal derating above 50°C ambient, and DO-41 lead-form compatibility with legacy through-hole PCB layouts.
Technical Context
This device employs a diffused junction structure optimized for fast switching and low conduction loss. Its 150ns reverse recovery time enables efficient operation up to ~100kHz in discontinuous conduction mode (DCM) flyback converters, while the 50V VRRM rating targets low-voltage secondary-side or bias winding rectification.
The 1.2V forward voltage at 1.5A and 35K/W junction-to-ambient thermal resistance define its power dissipation envelope under continuous conduction; derating begins at 50°C ambient per Figure 1, requiring heatsinking or airflow for sustained full-load operation above that temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum non-repetitive reverse voltage the diode withstands without breakdown; sets minimum safety margin over peak AC line or reflected voltage. |
| IO @ TA=50°C | 1.5 A - Continuous average forward current rating at 50°C ambient; requires PCB copper area or airflow for higher ambient operation. |
| VFM @ IF=1.5A | 1.2 V - Forward voltage drop determining conduction loss (1.8W at 1.5A); impacts efficiency and thermal design in linear or low-frequency rectifiers. |
| trr | 150 ns - Reverse recovery time affecting switching loss and EMI in SMPS; limits usable frequency range in hard-switched topologies. |
| IFSM | 50 A - Non-repetitive surge current capability for inrush or fault conditions; defines robustness against line transients or capacitor charging spikes. |
| RJA | 35 K/W - Junction-to-ambient thermal resistance; determines temperature rise (ΔT = Pd × RJA) for layout thermal management planning. |
Pinout & Package
DO-41 axial-leaded plastic package with cathode band marking. Leads are tin-plated, solderable per MIL-STD-202 Method 208, UL 94V-0 rated, and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to AC source or transformer secondary; polarity must match schematic symbol to avoid reverse conduction failure. |
| Cathode (banded end) | Forward current exit / reverse blocking terminal | Connected to output rail or filter capacitor; cathode band orientation must be verified during placement to prevent short-circuit damage. |
Key Features
| Feature | Design Value |
|---|---|
| Fast recovery (trr = 150 ns) | Reduces switching losses and EMI generation in 50–100 kHz flyback and forward converters compared to standard rectifiers. |
| Low VFM (1.2 V @ 1.5 A) | Lowers conduction loss by ~20% versus 1N4001-class diodes, improving efficiency in low-voltage bias supplies. |
| 50A IFSM surge rating | Withstands repeated cold-start inrush into bulk capacitors without degradation, eliminating need for external fusing in many Class II designs. |
| DO-41 package with RoHS-compliant finish | Enables direct replacement of legacy 1N400x parts on existing through-hole production lines without retooling or lead finish compatibility issues. |
Applications
| AC/DC Adapter Secondary Rectification | USB Charger Bias Winding Output |
|---|---|
Use Scenario: Rectifying 5–12V AC from transformer secondary in wall-wart adapters delivering ≤10W output. IC Role / Device Role / Timing Role: Unidirectional current path converting AC to pulsating DC prior to LC filtering and regulation. Use Value: 150ns trr minimizes switching loss at 66kHz operation; 1.2V VFM keeps conduction loss below 1.8W at full load, reducing heatsink requirements. | Use Scenario: Providing isolated VCC supply to PWM controller IC via auxiliary winding in flyback converters. IC Role / Device Role / Timing Role: High-efficiency rectifier for low-current, high-voltage bias windings (e.g., 18–24V AC). Use Value: 50V VRRM provides 2× margin over typical 24V peak bias winding voltage; DO-41 form factor fits compact auxiliary winding PCB footprints. |
| Industrial Control Power Supply Input | LED Driver Auxiliary Rail |
Use Scenario: Input rectification for 24VDC industrial control modules powered from 24VAC sources. IC Role / Device Role / Timing Role: Half-wave rectifier converting 24VAC to unregulated DC bus feeding linear regulators or buck converters. Use Value: 1.5A IO rating supports >15W loads; 35K/W RJA allows operation up to 70°C ambient with minimal copper pour, meeting EN 61000-6-2 thermal requirements. | Use Scenario: Generating gate drive or logic supply rail in constant-current LED drivers using transformer-isolated topology. IC Role / Device Role / Timing Role: Low-loss rectifier for isolated auxiliary power, typically operating at <100mA but requiring clean, stable voltage. Use Value: 5μA IRM at 25°C ensures negligible leakage-induced voltage droop; 20pF Cj minimizes capacitive coupling noise into sensitive analog feedback paths. |
Availability
PR1501S-T is available at Aetrix Electronics and suitable for AC/DC adapter secondary rectification, USB charger bias winding output, and industrial control power supply input requiring stable component supply and long-term manufacturing continuity.
Supply support for PR1501S-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, signal integrity, and protection applications.
The PR1501/S series belongs to Diodes' general-purpose fast recovery rectifier product line, designed specifically for cost-sensitive, medium-frequency (<100kHz) AC/DC conversion where efficiency, surge robustness, and through-hole manufacturability are prioritized over ultra-fast switching or ultra-low VF.
FAQ
Is PR1501S-T pin-compatible with 1N4001?
Yes, PR1501S-T uses the DO-41 package with identical lead spacing and mechanical dimensions as 1N4001. However, it offers faster recovery (150ns vs. 30μs), lower VF (1.2V vs. 1.1V), and higher IFSM (50A vs. 30A), making it a performance upgrade-not just a drop-in replacement-in switching applications.
What is the maximum ambient temperature for continuous 1.5A operation?
Per Figure 1 in the datasheet, the PR1501S-T is rated for 1.5A average forward current only up to 50°C ambient temperature. Above that, current must be linearly derated-e.g., to ~1.0A at 80°C ambient-unless additional PCB copper area or forced airflow reduces effective RJA.
Does PR1501S-T meet RoHS and lead-free requirements?
Yes, PR1501S-T features bright tin-plated leads and complies with RoHS Directive 2011/65/EU (Revision 13.2.2003), including exemptions for high-temperature solder and glass. It is also halogen-free and meets JEDEC J-STD-020C moisture sensitivity Level 1.
Why is PR1501S-T marked "NOT RECOMMENDED FOR NEW DESIGN"?
This designation reflects Diodes Incorporated's internal roadmap guidance: newer devices like the AP1501W (SOD-123FL) offer superior VF, trr, and thermal performance in smaller packages. PR1501S-T remains fully qualified and supported for legacy production and repair, but new designs should evaluate modern alternatives.
PR1501S-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):
- 50 V
- Current - Average Rectified (Io):
- 1.5A
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 1.5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 150 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 50 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
- Operating Temperature - Junction:
- -65°C ~ 150°C
PR1501S-T FAQ
1.How can I place an order for PR1501S-T through Aetrix?
Please submit a Request for Quotation (RFQ) for PR1501S-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 PR1501S-T reliable?
The price and inventory of PR1501S-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PR1501S-T is usually 5 days.
3.What payment methods are accepted for PR1501S-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PR1501S-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PR1501S-T?
PR1501S-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PR1501S-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 PR1501S-T?
For technical support, including PR1501S-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PR1501S-T requirements.
6.How does Aetrix verify that PR1501S-T is sourced from the original manufacturer or authorized distributors?
All PR1501S-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 PR1501S-T meets industry standards.
7.What is the process for return or replacement of PR1501S-T?
All PR1501S-T units undergo pre-shipment inspection (PSI). If there is an issue with PR1501S-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 PR1501S-T part is unused and in its original packaging.
Return procedure for PR1501S-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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