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Diodes Incorporated PR1501S-B
- Part No.:
- PR1501S-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
PR1501S-B.pdf
- Description:
- DIODE GEN PURP 50V 1.5A DO41
- Quantity:
- Payment:
- Shipping:
Inventory:2,605
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Product details
Overview
PR1501S-B from Diodes Incorporated is a 1.5A fast recovery rectifier diode in DO-41 package, designed for single-phase AC/DC conversion in power supplies and adapters. It features 50V peak repetitive reverse voltage (VRRM), 1.2V forward voltage at 1.5A (VFM), and 150ns reverse recovery time (trr), enabling high-efficiency operation in compact off-line SMPS and auxiliary power rails.
For engineers reviewing the PR1501S-B datasheet, PR1501S-B pinout, PR1501S-B application, or PR1501S-B equivalent, key selection criteria include its 50V blocking rating, 1.5A average rectified current at 50°C ambient, low 5.0µA reverse leakage at 25°C, and DO-41 through-hole mechanical compatibility with legacy board layouts.
Technical Context
This device employs a diffused junction structure optimized for fast switching and low conduction loss. Its 150ns trr and 1.2V VFM at rated current support high-frequency rectification up to 100kHz in flyback and forward converters without significant switching loss penalty.
The DO-41 package provides standardized axial lead geometry with 35K/W junction-to-ambient thermal resistance, requiring minimum 9.5mm lead length to heatsink for full 1.5A derating compliance. Reverse leakage remains ≤100µA at 100°C, ensuring stable performance in elevated ambient environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum non-repetitive reverse voltage the diode blocks reliably in circuit |
| IO @ TA=50°C | 1.5 A - Continuous average forward current sustainable with leads held at ambient at 9.5 mm from case |
| VFM @ IF=1.5A | 1.2 V - Forward voltage drop determining conduction loss and thermal rise in rectifier stage |
| trr | 150 ns - Time required to transition from forward conduction to reverse blocking, critical for EMI and efficiency |
| IFSM (8.3ms) | 50 A - Peak surge current capability during cold-start or line transient events |
| IRM @ 25°C | 5.0 µA - Reverse leakage current affecting standby power and voltage hold-up stability |
| RJA | 35 K/W - Thermal resistance defining temperature rise per watt of dissipated power in free-air mounting |
Pinout & Package
DO-41 axial-leaded plastic package with cathode band marking; standard 0.40" lead spacing, 2.00–2.72 mm body diameter, and 25.40 mm overall length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward current entry point | Connected to AC source or transformer secondary; must withstand peak inverse voltage during off-state |
| Cathode (banded end) | Forward current exit point | Connected to output capacitor or load; polarity marking ensures correct orientation on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Fast recovery time | 150 ns - Enables efficient operation in 50–100 kHz switch-mode power supplies without excessive switching loss |
| Low forward voltage | 1.2 V @ 1.5A - Reduces conduction loss by ~15% versus standard 1N400x series, lowering thermal stress |
| 50A surge rating | JEDEC-compliant 8.3ms half-sine pulse - Withstands inrush currents in unregulated AC/DC inputs |
| RoHS-compliant finish | Bright tin-plated leads - Ensures reliable solderability per MIL-STD-202, Method 208, and environmental compliance |
Applications
| AC/DC Adapter Input Stage | Industrial Control Power Supply |
|---|---|
Use Scenario: Rectifying 50/60Hz AC from wall outlet into DC for low-power embedded controllers. IC Role / Device Role / Timing Role: Primary-side fast recovery rectifier in half-wave configuration feeding bulk capacitor. Use Value: 150ns trr minimizes reverse recovery charge, reducing EMI generation and improving input filter sizing efficiency. | Use Scenario: Providing isolated +5V/12V bias rails for PLC I/O modules operating in 0–70°C industrial enclosures. IC Role / Device Role / Timing Role: Secondary-side output rectifier in flyback converter delivering regulated auxiliary power. Use Value: 1.2V VFM at 1.5A maintains <1.8W conduction loss, enabling natural convection cooling without heatsink. |
| LED Driver Auxiliary Supply | Appliance Main Power Rectification |
Use Scenario: Generating low-current DC for LED driver IC bias and feedback circuitry in retrofit lamps. IC Role / Device Role / Timing Role: Standby power rectifier supplying control logic while main LED string is off. Use Value: 5.0µA IRM at 25°C ensures <1mW standby dissipation, meeting Energy Star Level VI requirements. | Use Scenario: Converting mains AC to DC bus for motor drive inverters in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Input bridge leg rectifier handling 1.5A continuous current under resistive-inductive load. Use Value: DO-41 mechanical robustness and 35K/W RJA allow direct PCB mounting with no additional thermal relief. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4933 | VRRM = 50V, trr = 200ns, VFM = 1.3V @ 1.5A | Slower recovery increases switching loss in >50kHz designs | Acceptable where EMI constraints are relaxed and cost is primary driver |
| FR101 | VRRM = 50V, trr = 150ns, VFM = 1.3V @ 1.0A (derated at 1.5A) | Lower IO rating requires thermal margin reduction or forced air cooling | Suitable for space-constrained boards where DO-41 footprint is mandatory but peak current is intermittent |
Compared with 1N4933 and FR101, PR1501S-B delivers superior combination of low VFM and tight trr specification at full 1.5A rating, making it optimal for thermally constrained, high-frequency AC/DC stages where efficiency and EMI are co-critical.
Availability
PR1501S-B is available at Aetrix Electronics and suitable for AC/DC adapters, industrial control power supplies, LED driver auxiliary circuits, and appliance main power rectification requiring stable component supply and long-term manufacturing continuity.
Supply support for PR1501S-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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
The PR1501S-B belongs to the PR150x/S fast recovery rectifier product line, engineered specifically for high-efficiency, cost-sensitive AC/DC front-end rectification in consumer and industrial power supplies.
FAQ
Is PR1501S-B RoHS compliant?
Yes, PR1501S-B features bright tin-plated leads and meets RoHS Directive 2011/65/EU with exemptions for glass and high-temperature solder per Annexes 5 and 7. Compliance is verified per EU Directive revision 13.2.2003 and documented in Diodes Incorporated's material declarations.
What is the maximum operating temperature for PR1501S-B?
The junction and storage temperature range is –65°C to +150°C. At 100°C ambient, reverse leakage rises to 100µA, and average forward current must be derated per Figure 1 - at 100°C ambient, IO drops to approximately 0.9A for DO-41 mounting with 9.5mm lead length.
Can PR1501S-B replace 1N4001 in existing designs?
Yes, PR1501S-B is a direct form-fit replacement for 1N4001 in DO-41 packages, offering identical pinout and mechanical dimensions. However, its faster 150ns trr and lower 1.2V VFM improve efficiency and reduce EMI, though layout parasitics should be reviewed for potential ringing due to higher di/dt.
Why is PR1501S-B marked "NOT RECOMMENDED FOR NEW DESIGN"?
This designation reflects Diodes Incorporated's strategic shift toward higher-performance, lower-loss alternatives like the FRED Pt® series. PR1501S-B remains fully qualified and supported for legacy production and repair, but new designs should evaluate successors offering <100ns trr and <1.0V VFM for improved efficiency.
PR1501S-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- 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:
- 20pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
- Operating Temperature - Junction:
- -65°C ~ 150°C
PR1501S-B FAQ
1.How can I place an order for PR1501S-B through Aetrix?
Please submit a Request for Quotation (RFQ) for PR1501S-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 PR1501S-B reliable?
The price and inventory of PR1501S-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PR1501S-B is usually 5 days.
3.What payment methods are accepted for PR1501S-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PR1501S-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PR1501S-B?
PR1501S-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PR1501S-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 PR1501S-B?
For technical support, including PR1501S-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PR1501S-B requirements.
6.How does Aetrix verify that PR1501S-B is sourced from the original manufacturer or authorized distributors?
All PR1501S-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 PR1501S-B meets industry standards.
7.What is the process for return or replacement of PR1501S-B?
All PR1501S-B units undergo pre-shipment inspection (PSI). If there is an issue with PR1501S-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 PR1501S-B part is unused and in its original packaging.
Return procedure for PR1501S-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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