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Diodes Incorporated SBL1645PT
- Part No.:
- SBL1645PT
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-3P-3, SC-65-3
- Datasheet:
-
SBL1645PT.pdf
- Description:
- DIODE ARRAY SCHOTT 45V 16A TO-3P
- Quantity:
- Payment:
- Shipping:
Inventory:4,127
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Product details
Overview
SBL1645PT from Diodes Incorporated is a 16A, 45V TO-3P-packaged Schottky barrier rectifier with 0.55V forward voltage at 8.0A and 25°C, 250A non-repetitive surge capability, and 3.5°C/W junction-to-case thermal resistance-designed for low-voltage, high-frequency inverters and polarity protection in industrial power supplies.
For engineers reviewing the SBL1645PT datasheet, SBL1645PT pinout, SBL1645PT application, or SBL1645PT equivalent, key selection criteria include its 45V blocking rating, low VF performance under 8A DC load, TO-3P mechanical compatibility with heatsink mounting, and transient robustness per JEDEC 8.3ms surge testing.
Technical Context
This discrete Schottky rectifier uses guard-ring die construction to enhance transient immunity and reduce leakage during reverse-biased operation. Its low forward voltage drop and high surge current rating support efficient energy transfer in switching topologies where conduction loss minimization is critical.
The device operates across –65°C to +150°C with a thermal resistance of 3.5°C/W when mounted on a heatsink, enabling stable performance in thermally constrained industrial environments. Capacitance is specified at 700pF (1MHz, 4V reverse bias), supporting high-frequency freewheeling applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum peak repetitive reverse voltage; defines safe operating limit in bridge or clamp configurations. |
| IO | 16 A @ TC = 95°C - Continuous average output current capacity with heatsink; derated above 95°C per Fig. 1. |
| VFM | 0.55 V @ IF = 8.0 A, TC = 25°C - Low conduction loss enables >92% efficiency in 12–24V DC-DC stages. |
| IFSM | 250 A (8.3 ms half-sine) - Withstands inrush and fault currents without bond-wire failure per JEDEC test method. |
| RJC | 3.5 °C/W - Enables direct heatsink mounting for thermal management in compact 1U power supplies. |
| CT | 700 pF @ 1 MHz, 4 V reverse - Limits high-frequency ringing in snubberless flyback or synchronous rectifier circuits. |
Pinout & Package
TO-3P package: 3-terminal isolated case with center anode (A), left cathode (K), and right cathode (K); molded plastic body (UL 94V-0), bright tin-plated leads, polarity marked on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Center) | Input current entry point | Connected to AC input or switch node; must be routed with low-inductance path to minimize voltage overshoot. |
| Cathode (Left) | Output current exit (common cathode) | Joined internally with right cathode; serves as DC output rail connection point for dual-cathode symmetry. |
| Cathode (Right) | Output current exit (common cathode) | Electrically identical to left cathode; allows balanced PCB layout and parallel trace routing for thermal symmetry. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Reduces IR leakage by >90% at 100°C vs. non-guarded Schottky dies, improving reliability in hot ambient conditions. |
| Low VF at high current | 0.55 V @ 8A enables <1.2W conduction loss per device in 16A single-phase rectification, reducing heatsink size. |
| High IFSM rating | 250A surge withstand supports use in motor drive front-ends without external fusing or current limiting. |
| RoHS-compliant finish | Bright tin plating meets MIL-STD-202 solderability requirements and eliminates lead-based assembly concerns. |
Applications
| Industrial Switch-Mode Power Supply | DC Motor Drive Freewheeling |
|---|---|
Use Scenario: Secondary-side rectification in 24V/16A open-frame AC-DC power supplies for PLCs and HMIs. IC Role / Device Role / Timing Role: Main output rectifier handling continuous 16A DC load with minimal conduction loss. Use Value: 0.55V VF reduces power dissipation by 1.8W versus comparable 0.75V devices, lowering thermal stress on heatsink. |
Use Scenario: Freewheeling path across brushed DC motor windings during PWM turn-off in 24–48V drives. IC Role / Device Role / Timing Role: Fast-recovery path for inductive kickback, clamping voltage spikes below 45V. Use Value: 250A IFSM safely absorbs 10× rated current surges during motor stall or reversal events. |
| Polarity Protection Circuit | Low-Voltage Inverter Output Stage |
Use Scenario: Reverse-voltage blocking in 12V battery-powered instrumentation with hot-swap capability. IC Role / Device Role / Timing Role: Series-connected anode-in configuration preventing damage from accidental reverse battery insertion. Use Value: 45V VRRM provides 3.75× margin over 12V nominal, ensuring long-term reliability under load dump transients. |
Use Scenario: Output rectification in 24V solar microinverters operating at 20–50 kHz switching frequency. IC Role / Device Role / Timing Role: High-frequency unidirectional conduction element minimizing switching losses in H-bridge output stage. Use Value: 700pF CT limits displacement current and EMI generation at 50 kHz, easing filter design. |
Availability
SBL1645PT is available at Aetrix Electronics and suitable for industrial switch-mode power supplies, DC motor drive freewheeling, and polarity protection circuits requiring stable component supply despite end-of-life status.
Supply support for SBL1645PT 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 and signal integrity solutions for industrial and consumer markets.
The SBL16xxPT series belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for low-loss, high-reliability rectification in 12–48V power conversion systems.
FAQ
Is SBL1645PT still in production?
No-SBL1645PT is officially obsolete and discontinued per Diodes Incorporated's DS23046 Rev. 5 (August 2015). No new manufacturing lots are planned, and no factory-authorized replacements have been designated. Aetrix Electronics maintains limited legacy stock for continuity support.
What is the correct mounting orientation for thermal performance?
The TO-3P case must be mounted flat against a heatsink using the full base area (20.63–22.38 mm × 18.5–21.5 mm), with thermal interface material applied uniformly. Mechanical data specify case thickness (C) and flange height (H) to ensure proper clamping pressure and contact area.
Can SBL1645PT replace SBL1640PT or SBL1650PT in existing designs?
Yes-SBL1645PT shares identical TO-3P package, pinout, and thermal characteristics with SBL1640PT (40V) and SBL1650PT (50V). Its 45V VRRM offers intermediate voltage margin; verify system peak reverse voltage does not exceed 45V before substitution.
Does this part meet automotive AEC-Q101 requirements?
No-SBL1645PT is not qualified to AEC-Q101. It is rated for industrial temperature range (–65°C to +150°C) and intended for commercial/industrial applications only. Diodes Incorporated explicitly excludes life-support and automotive-critical use without written approval.
SBL1645PT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-3P-3, SC-65-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io) (per Diode):
- 16A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 8 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 45 V
- Operating Temperature - Junction:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-3P
SBL1645PT FAQ
1.How can I place an order for SBL1645PT through Aetrix?
Please submit a Request for Quotation (RFQ) for SBL1645PT 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 SBL1645PT reliable?
The price and inventory of SBL1645PT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBL1645PT is usually 5 days.
3.What payment methods are accepted for SBL1645PT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBL1645PT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBL1645PT?
SBL1645PT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBL1645PT 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 SBL1645PT?
For technical support, including SBL1645PT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBL1645PT requirements.
6.How does Aetrix verify that SBL1645PT is sourced from the original manufacturer or authorized distributors?
All SBL1645PT 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 SBL1645PT meets industry standards.
7.What is the process for return or replacement of SBL1645PT?
All SBL1645PT units undergo pre-shipment inspection (PSI). If there is an issue with SBL1645PT, 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 SBL1645PT part is unused and in its original packaging.
Return procedure for SBL1645PT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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