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Diodes Incorporated PR1504-T
- Part No.:
- PR1504-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
PR1504-T.pdf
- Description:
- DIODE GEN PURP 400V 1.5A DO15
- Quantity:
- Payment:
- Shipping:
Inventory:8,509
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Product details
Overview
PR1504-T 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 - optimized for high-efficiency AC/DC front-end rectification in offline power supplies and LED drivers.
For engineers reviewing the PR1504-T datasheet, PR1504-T pinout, PR1504-T application, or PR1504-T equivalent, key selection criteria include VRRM derating margin, trr-dependent switching loss in flyback/frequency-modulated topologies, thermal resistance (RJA = 35 K/W), and DO-41 lead-form compatibility with legacy through-hole PCB layouts.
Technical Context
This device employs a diffused junction structure to achieve fast switching with low forward conduction loss and controlled reverse recovery behavior. Its 150ns trr (measured at IF = 0.5A, IR = 1.0A, Irr = 0.25A) supports operation up to ~100 kHz in discontinuous conduction mode (DCM) SMPS designs.
The 400V VRRM rating targets universal-input (85–265VAC) offline applications where transient clamping margin and DC blocking stability are critical. Reverse leakage remains ≤5.0 µA at 25°C and ≤100 µA at 100°C under rated VR, ensuring low standby power in energy-sensitive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Withstands peak line transients in 230VAC mains without avalanche breakdown |
| IO @ TA=50°C | 1.5 A - Sustains continuous output current in open-frame adapters with 9.5mm lead length |
| VFM @ IF=1.5A | 1.2 V - Limits conduction loss to ~1.8W at full load, easing thermal design |
| trr | 150 ns - Reduces switching loss and EMI generation compared to standard recovery diodes |
| RJA | 35 K/W - Enables 1.5A operation at ambient ≤70°C without heatsink in free-air conditions |
| IFSM (8.3ms) | 50 A - Survives cold-start inrush surges in capacitor-input filter stages |
Pinout & Package
DO-41 axial-leaded plastic package with cathode band marking. Standard lead spacing: 0.300" (7.62 mm). Cathode terminal identified by painted band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | AC input / transformer secondary connection point | Accepts alternating polarity during positive half-cycle; must withstand surge current |
| Cathode | DC output / filter capacitor positive node | Delivers rectified current; polarity marking ensures correct orientation on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Fast recovery (trr = 150 ns) | Reduces turn-off switching loss and associated RFI in high-frequency SMPS |
| Low VFM (1.2 V @ 1.5A) | Minimizes I²R heating and improves efficiency in compact, thermally constrained adapters |
| 50A non-repetitive surge rating | Handles repeated cold-start events without degradation in capacitor-input configurations |
| RoHS-compliant bright tin plating | Ensures reliable solder wetting per MIL-STD-202 Method 208 and eliminates lead-based process risk |
Applications
| LED Driver Input Rectification | Offline AC/DC Adapter |
|---|---|
Use Scenario: Rectifying 50/60Hz AC from bridge input to feed constant-current LED driver IC. IC Role / Device Role / Timing Role: Unidirectional current path enabling DC bus formation prior to buck/boost regulation. Use Value: 150ns trr suppresses high-frequency ringing induced by transformer leakage inductor interaction. | Use Scenario: Primary-side rectification in 5–15W universal-input wall adapters. IC Role / Device Role / Timing Role: Half-wave rectifier converting transformer secondary AC to pulsating DC for bulk capacitor charging. Use Value: 400V VRRM provides 1.5× margin over 265VAC peak (375V), accommodating line surges and ringing. |
| Industrial Control Power Supply | Appliance Auxiliary Power |
Use Scenario: Generating +12V/5V auxiliary rails from mains via transformer and linear regulator. IC Role / Device Role / Timing Role: High-reliability rectifier in low-cost, fixed-frequency flyback-derived supply. Use Value: 35 K/W RJA allows operation at 70°C ambient without forced air, meeting IP65 enclosure thermal limits. | Use Scenario: Standby power rectification in washing machines, microwaves, and HVAC controllers. IC Role / Device Role / Timing Role: Low-leakage rectifier maintaining <5 µA reverse current at 25°C to minimize no-load consumption. Use Value: ≤100 µA IR at 100°C ensures stable 5V rail during extended high-temperature bake cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1L04 | VRRM = 400V, IO = 1.0A, trr = 100ns, DO-41 | Lower average current rating; tighter trr spec | Preferred where switching frequency >150 kHz and thermal headroom is limited |
| 1N4937 | VRRM = 600V, IO = 1.0A, trr = 200ns, DO-41 | Higher voltage rating but slower recovery and lower current capability | Suitable for higher-voltage, lower-frequency applications where surge robustness outweighs speed |
Compared with STTH1L04 and 1N4937, PR1504-T uniquely balances 1.5A current handling, 400V blocking, and 150ns recovery - making it optimal for cost-sensitive, thermally constrained 10–12W universal-input adapters requiring proven reliability and legacy DO-41 footprint compatibility.
Availability
PR1504-T is available at Aetrix Electronics and suitable for offline AC/DC adapters, LED driver input stages, industrial auxiliary power supplies, and appliance standby power circuits requiring stable component supply and long-term manufacturing continuity.
Supply support for PR1504-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-efficiency power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The PR150x/S series targets cost-optimized, through-hole rectification in legacy and new-design AC/DC power conversion - emphasizing ruggedness, thermal stability, and RoHS compliance without sacrificing switching performance.
FAQ
What is the maximum operating temperature for PR1504-T?
The PR1504-T has a specified junction and storage temperature range of –65°C to +150°C. Its thermal resistance (RJA = 35 K/W) means that at 1.5A DC load and 50°C ambient, junction temperature reaches approximately 102.5°C - well within safe operating limits. Derating is required above 50°C ambient per Figure 1.
Is PR1504-T compatible with lead-free reflow soldering?
PR1504-T features bright tin-plated leads compliant with MIL-STD-202 Method 208 and RoHS Directive 2011/65/EU. It is qualified for lead-free wave and hand-soldering processes but not recommended for standard Pb-free reflow due to its axial DO-41 package construction and thermal mass limitations.
Does PR1504-T have a cathode band marking?
Yes - PR1504-T uses a distinct cathode band (painted stripe) on the DO-41 body to identify the cathode terminal. This marking aligns with industry-standard polarity conventions and ensures correct orientation during manual or automated assembly onto PCBs.
Why is PR1504-T marked "NOT RECOMMENDED FOR NEW DESIGN"?
This designation reflects Diodes Incorporated's internal roadmap guidance: newer surface-mount alternatives (e.g., SOD-123W or SMA packages) offer superior thermal performance and board-space efficiency. However, PR1504-T remains fully qualified, in active production, and appropriate for through-hole designs requiring proven reliability and long-lifecycle support.
PR1504-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-204AC, DO-15, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-15
- Operating Temperature - Junction:
- -65°C ~ 150°C
PR1504-T FAQ
1.How can I place an order for PR1504-T through Aetrix?
Please submit a Request for Quotation (RFQ) for PR1504-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 PR1504-T reliable?
The price and inventory of PR1504-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PR1504-T is usually 5 days.
3.What payment methods are accepted for PR1504-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PR1504-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PR1504-T?
PR1504-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PR1504-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 PR1504-T?
For technical support, including PR1504-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PR1504-T requirements.
6.How does Aetrix verify that PR1504-T is sourced from the original manufacturer or authorized distributors?
All PR1504-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 PR1504-T meets industry standards.
7.What is the process for return or replacement of PR1504-T?
All PR1504-T units undergo pre-shipment inspection (PSI). If there is an issue with PR1504-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 PR1504-T part is unused and in its original packaging.
Return procedure for PR1504-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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