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Diodes Incorporated PR1504S-B
- Part No.:
- PR1504S-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
PR1504S-B.pdf
- Description:
- DIODE GEN PURP 400V 1.5A DO41
- Quantity:
- Payment:
- Shipping:
Inventory:7,225
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Product details
Overview
PR1504S-B from Diodes Incorporated is a 1.5A fast recovery rectifier diode in DO-41 package, rated for 400V peak repetitive reverse voltage (VRRM), 1.2V forward voltage at 1.5A, and 150ns reverse recovery time - used in AC/DC input stage rectification for offline power supplies and auxiliary power rails.
For engineers reviewing the PR1504S-B datasheet, PR1504S-B pinout, PR1504S-B application, or PR1504S-B equivalent, key selection criteria include VRRM derating margin, trr-dependent switching loss in 50–100kHz flyback designs, thermal resistance (RθJA = 35 K/W), and DO-41 lead-form compatibility with legacy through-hole PCB layouts.
Technical Context
This device employs a diffused junction silicon structure optimized for fast switching and low conduction loss. Its 150ns reverse recovery time (trr) and 20pF junction capacitance (Cj) support operation in medium-frequency SMPS topologies without excessive ringing or EMI generation.
The 1.5A average rectified current rating assumes 50°C ambient with leads held at ambient temperature at 9.5mm from case; surge capability reaches 50A (8.3ms half-sine) enabling robustness against line transients in unregulated input stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum non-repetitive reverse voltage before breakdown; sets minimum clearance for 230VAC mains-derived inputs with safety margin. |
| IO @ TA=50°C | 1.5 A - Continuous DC output current under defined thermal conditions; requires heatsinking or board copper for sustained >1W dissipation. |
| VFM @ IF=1.5A | 1.2 V - Forward voltage drop determining conduction loss (1.8W at 1.5A); lower than standard PN rectifiers for improved efficiency. |
| trr | 150 ns - Reverse recovery time measured at IF=0.5A, IR=1.0A, Irr=0.25A; enables use up to ~100kHz without excessive switching loss. |
| RθJA | 35 K/W - Junction-to-ambient thermal resistance in free air; defines temperature rise per watt (e.g., +52.5°C at 1.5W dissipation). |
| IRM @ 25°C | 5.0 µA - Peak reverse leakage at rated blocking voltage; negligible for high-impedance bias networks but critical in low-power standby circuits. |
Pinout & Package
DO-41 axial-leaded plastic package with cathode band marking; body diameter 2.00–2.72 mm, length 4.06–5.21 mm, lead diameter 0.71–0.864 mm. Cathode band identifies terminal polarity for correct orientation in series/parallel rectifier configurations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for forward conduction | Connected to AC source or transformer secondary; must withstand full reverse voltage when off. |
| Cathode | Output terminal for forward conduction | Connected to bulk capacitor or load; marked by band; carries full rectified current and dissipates heat. |
Key Features
| Feature | Design Value |
|---|---|
| Fast recovery (trr = 150 ns) | Reduces switching losses and EMI in 50–100 kHz flyback and forward converters versus standard rectifiers. |
| Low VFM (1.2 V @ 1.5A) | Lowers conduction loss by ~20% vs. 1N4007 (1.5V), improving efficiency in low-voltage output stages. |
| 50A IFSM surge rating | Withstands cold-start inrush and lightning-induced line surges without failure in unprotected AC inputs. |
| RoHS-compliant tin-plated leads | Enables lead-free reflow soldering and meets EU Directive 2011/65/EU without exemptions beyond Annex VII. |
Applications
| AC/DC Adapter Input Rectification | Industrial Control Power Supply |
|---|---|
Use Scenario: Single-phase 230VAC input rectification feeding 300VDC bulk capacitor in 15W wall adapter. IC Role / Device Role / Timing Role: Primary rectifier converting AC to pulsating DC; operates at line frequency with minimal reverse recovery stress. Use Value: 400V VRRM provides 1.7× margin over 230VAC peak (325V), while 150ns trr prevents excessive loss during zero-crossing transitions. | Use Scenario: Auxiliary 12V/1A supply derived from 24VAC control rail in PLC backplane. IC Role / Device Role / Timing Role: Half-wave rectifier in low-current, space-constrained linear regulator front-end. Use Value: DO-41 package fits legacy through-hole footprints; 1.2V VFM minimizes dropout across series pass transistor. |
| LED Driver Bulk Capacitor Charging | Relay Coil Snubber Circuit |
Use Scenario: Charging 47µF bulk capacitor in constant-current LED driver operating from 120VAC. IC Role / Device Role / Timing Role: Half-wave rectifier supplying ripple-sensitive current source; subjected to capacitive load derating. Use Value: 20% current derating applied per spec yields 1.2A IO, sufficient for 350mA LED string with 10% margin. | Use Scenario: Freewheeling path for 24VDC relay coil (80Ω, 300mA) in industrial I/O module. IC Role / Device Role / Timing Role: Clamp diode suppressing inductive kickback during coil de-energization. Use Value: 50A IFSM handles 10× nominal coil current spikes; 150ns trr ensures rapid turn-off without voltage overshoot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4937 | VRRM = 600V, trr = 200ns, VFM = 1.3V @ 1A | Higher voltage rating but slower recovery and higher forward drop at same current | Prefer when >400V isolation margin required; avoid where trr-driven EMI is critical. |
| FR104 | VRRM = 400V, trr = 150ns, VFM = 1.3V @ 1A, IO = 1.0A | Same VRRM/trr but lower current rating and higher VFM | Select only for <1A loads; verify thermal margin due to reduced IO and higher VFM. |
Compared with 1N4937 and FR104, PR1504S-B delivers optimal balance of 400V rating, 150ns trr, and 1.2V VFM at 1.5A - making it preferred for cost-sensitive, thermally constrained 10–25W offline supplies where both efficiency and EMI must be controlled.
Availability
PR1504S-B is available at Aetrix Electronics and suitable for AC/DC adapters, industrial control power supplies, LED driver front-ends, and relay snubber circuits requiring stable component supply and long-term obsolescence management.
Supply support for PR1504S-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, serving automotive, industrial, computing, and consumer markets with high-reliability components.
The PR150x/S series targets cost-effective, through-hole fast rectification in legacy and new-design power conversion systems - emphasizing manufacturability, thermal performance, and compliance with RoHS and JEDEC reliability standards.
FAQ
Is PR1504S-B suitable for capacitive-load applications?
Yes, but with 20% current derating per datasheet Note 1. At 50°C ambient, its rated IO drops from 1.5A to 1.2A when charging bulk capacitors. This accounts for increased RMS current and thermal stress caused by peaky charging waveforms in capacitor-input filters.
What is the maximum allowable junction temperature for continuous operation?
The absolute maximum junction temperature is +150°C, and the storage temperature range is identical. For reliable long-term operation, design should limit Tj to ≤125°C using RθJA = 35 K/W and actual power dissipation - e.g., 1.5W loss yields +52.5°C rise above ambient, permitting 72.5°C max ambient.
Does PR1504S-B have a qualified lead-free finish?
Yes - it features bright tin-plated leads compliant with RoHS Directive 2011/65/EU, including exemptions for high-melting-point solder (Annex VII). It passes MIL-STD-202 Method 208 solderability testing and supports lead-free reflow profiles up to 260°C peak.
How does the DO-41 package affect thermal performance compared to DO-15?
DO-41 has slightly lower RθJA (35 K/W vs. DO-15's ~40 K/W) due to shorter lead length and tighter internal geometry, yielding ~15% better natural convection cooling. However, DO-15 offers higher mechanical robustness and is preferred for high-vibration environments despite marginally higher thermal resistance.
PR1504S-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):
- 400 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 @ 400 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
PR1504S-B FAQ
1.How can I place an order for PR1504S-B through Aetrix?
Please submit a Request for Quotation (RFQ) for PR1504S-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 PR1504S-B reliable?
The price and inventory of PR1504S-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PR1504S-B is usually 5 days.
3.What payment methods are accepted for PR1504S-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PR1504S-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PR1504S-B?
PR1504S-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PR1504S-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 PR1504S-B?
For technical support, including PR1504S-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PR1504S-B requirements.
6.How does Aetrix verify that PR1504S-B is sourced from the original manufacturer or authorized distributors?
All PR1504S-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 PR1504S-B meets industry standards.
7.What is the process for return or replacement of PR1504S-B?
All PR1504S-B units undergo pre-shipment inspection (PSI). If there is an issue with PR1504S-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 PR1504S-B part is unused and in its original packaging.
Return procedure for PR1504S-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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