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Diodes Incorporated SBL4050PT
- Part No.:
- SBL4050PT
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-3P-3, SC-65-3
- Datasheet:
-
SBL4050PT.pdf
- Description:
- DIODE ARRAY SCHOTT 50V 40A TO-3P
- Quantity:
- Payment:
- Shipping:
Inventory:6,125
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Product details
Overview
SBL4050PT from Diodes Incorporated is a 40A, 50V Schottky barrier rectifier in TO-3P package, featuring low forward voltage drop (0.58 V @ 20 A, 25°C), high surge capability (375 A, 8.3 ms), and thermal resistance of 1.4°C/W - designed for low-voltage, high-frequency inverters, freewheeling diodes, and polarity protection circuits in industrial power supplies.
For engineers reviewing the SBL4050PT datasheet, SBL4050PT pinout, SBL4050PT application, or SBL4050PT equivalent, key selection criteria include peak repetitive reverse voltage (50 V), average rectified current at TC = 100°C (40 A), forward voltage at rated current, junction-to-case thermal resistance, and RoHS-compliant tin-plated leads for lead-free assembly.
Technical Context
This device uses Schottky barrier chip construction with integrated guard ring for transient protection, enabling fast switching and minimal reverse recovery loss. Its low VF and high IO support high-efficiency DC-DC conversion and output rectification in SMPS topologies.
The TO-3P package provides robust thermal performance (RJC = 1.4°C/W) when mounted on a heatsink, and its 800 pF typical junction capacitance at 1 MHz/4 V supports stable operation in high-frequency (>100 kHz) applications without excessive capacitive loading.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum non-repetitive reverse voltage before breakdown; sets safe operating limit in 48 V bus polarity protection. |
| IO @ TC = 100°C | 40 A - Continuous average forward current under heatsink-cooled conditions; defines usable output capacity in 1 kW+ power stages. |
| VFM @ IF = 20 A, 25°C | 0.58 V - Low conduction loss reduces power dissipation by ~11.6 W vs. silicon diode at same current, improving thermal margin. |
| IFSM (8.3 ms) | 375 A - Withstands short-duration inrush and fault currents in motor drives and UPS systems without failure. |
| RJC | 1.4 °C/W - Enables direct thermal coupling to heatsink; allows ~56°C temperature rise at 40 W dissipation. |
| CT @ 1 MHz, 4 V | 800 pF - Limits high-frequency displacement current; suitable for <500 kHz switching without EMI amplification. |
Pinout & Package
TO-3P package: 3-terminal molded plastic case (UL 94V-0), with anode (A), cathode (K), and case (electrically connected to cathode). Dimensions per DS30236 Rev. 4: A = 1.88–2.08 mm, B = 4.68–5.36 mm, C = 20.63–22.38 mm, D = 18.5–21.5 mm, H = 15.38–16.25 mm, R = 11.70–12.84 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Input current entry point | Connected to source side (e.g., transformer secondary or switch node); must withstand full reverse voltage during off-state. |
| Cathode (K) | Output current exit point | Internally tied to metal case; serves as main output terminal and thermal path to heatsink. |
| Case (K) | Common cathode & thermal interface | Electrically identical to cathode pin; requires insulating washer if heatsink is grounded to avoid short circuit. |
Key Features
| Feature | Design Value |
|---|---|
| Schottky barrier + guard ring die | Enables inherent transient suppression without external TVS, reducing BOM count in 48 V automotive auxiliary supplies. |
| Low VF (0.58 V @ 20 A) | Reduces conduction loss by >40% vs. comparable Si fast recovery diodes, directly lowering heatsink size requirements. |
| High IFSM (375 A) | Supports reliable operation during cold-crank surges and motor stall events in industrial inverters without derating. |
| RoHS-compliant bright tin plating | Ensures compatibility with lead-free reflow profiles (peak ≤260°C) and long-term solder joint reliability per MIL-STD-202. |
Applications
| Industrial SMPS Output Rectification | 48 V Polarity Protection |
|---|---|
Use Scenario: Secondary-side rectification in 1–2 kW telecom and server PSUs operating at 100–300 kHz. IC Role / Device Role / Timing Role: Main output rectifier replacing fast recovery diodes to reduce losses and improve efficiency above 92%. Use Value: 0.58 V forward drop cuts conduction loss by ~12 W at 20 A, allowing smaller heatsinks and higher power density. | Use Scenario: Reverse-voltage blocking in 48 V DC distribution networks for factory automation controllers. IC Role / Device Role / Timing Role: Unidirectional current gate preventing damage from miswired inputs or battery reversal. Use Value: 50 V VRRM provides 20% margin over nominal 48 V rail, while 375 A IFSM survives accidental short-circuit transients. |
| Motor Drive Freewheeling | High-Frequency Inverter Bridge Clamp |
Use Scenario: Freewheeling path across IGBTs in 3-phase 7.5 kW HVAC inverter drives. IC Role / Device Role / Timing Role: Provides low-loss return path for inductive kickback during PWM dead-time intervals. Use Value: Near-zero reverse recovery charge eliminates switching spikes, reducing EMI filter burden and gate drive stress. | Use Scenario: Clamp diode in resonant LLC half-bridge converters operating at 300–500 kHz. IC Role / Device Role / Timing Role: Absorbs leakage inductance energy and shapes ZVS transition waveforms. Use Value: 800 pF capacitance stabilizes snubber dynamics without requiring external RC networks, simplifying layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-40CPH05 | Same 50 V VRRM, but 0.65 V VF @ 20 A and 1.8°C/W RJC; TO-247AC package. | Higher thermal resistance requires larger heatsink area; less suitable for space-constrained 1U PSUs. | Select when legacy TO-247 footprint compatibility is required and thermal margin permits higher RJC. |
| ON Semiconductor MBR4050CT | 50 V VRRM, dual common-cathode configuration; 0.62 V VF @ 20 A; TO-220AB package. | Not single-diode; requires redesign for single-path freewheeling; lower surge rating (300 A). | Choose only for dual-output or synchronous rectifier designs where common-cathode topology aligns with system architecture. |
Compared with VS-40CPH05 and MBR4050CT, the SBL4050PT delivers superior thermal performance (1.4°C/W) and lowest forward voltage in its class, making it optimal for high-power-density, single-diode rectification where heatsink real estate is constrained.
Availability
SBL4050PT is available at Aetrix Electronics and suitable for industrial SMPS, 48 V polarity protection, motor drive freewheeling, and high-frequency inverter clamp applications requiring stable component supply despite its obsolete status.
Supply support for SBL4050PT 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 industrial, computing, communications, and consumer markets with high-reliability components.
The SBL40xxPT series belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for efficiency-critical, high-temperature power conversion in industrial and telecom infrastructure.
FAQ
Is SBL4050PT still in production?
No - Diodes Incorporated officially discontinued the SBL4050PT as of July 2015 (DS30236 Rev. 4). It is marked "OBSOLETE – PART DISCONTINUED" in all official documentation. Aetrix Electronics maintains limited legacy stock with full traceability and offers engineering support for last-time buys and obsolescence mitigation.
What is the maximum operating junction temperature?
The SBL4050PT has a specified operating junction temperature range of –55°C to +125°C. Derating begins at TC = 100°C per Figure 1; sustained operation above 125°C risks irreversible parametric shift and premature failure due to thermal runaway in the Schottky junction.
Can SBL4050PT be used in surface-mount designs?
No - the SBL4050PT uses a through-hole TO-3P package with three leads intended for bolt-down mounting to a heatsink. It lacks SMD-compatible terminations or thermal pad design; attempting reflow or wave soldering will damage the internal die bond and compromise hermeticity.
Does this part meet automotive AEC-Q101 requirements?
No - the SBL4050PT is not qualified to AEC-Q101. It is specified for industrial and commercial applications only. Its datasheet does not list automotive stress test results (e.g., HTGB, HTRB, temperature cycling), and Diodes Incorporated does not assign it to any automotive-grade product family.
SBL4050PT 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):
- 50 V
- Current - Average Rectified (Io) (per Diode):
- 40A
- Voltage - Forward (Vf) (Max) @ If:
- 700 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 mA @ 50 V
- Operating Temperature - Junction:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-3P
SBL4050PT FAQ
1.How can I place an order for SBL4050PT through Aetrix?
Please submit a Request for Quotation (RFQ) for SBL4050PT 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 SBL4050PT reliable?
The price and inventory of SBL4050PT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBL4050PT is usually 5 days.
3.What payment methods are accepted for SBL4050PT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBL4050PT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBL4050PT?
SBL4050PT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBL4050PT 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 SBL4050PT?
For technical support, including SBL4050PT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBL4050PT requirements.
6.How does Aetrix verify that SBL4050PT is sourced from the original manufacturer or authorized distributors?
All SBL4050PT 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 SBL4050PT meets industry standards.
7.What is the process for return or replacement of SBL4050PT?
All SBL4050PT units undergo pre-shipment inspection (PSI). If there is an issue with SBL4050PT, 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 SBL4050PT part is unused and in its original packaging.
Return procedure for SBL4050PT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SBL4050PT Tags
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BAV99-7-F
Diodes Incorporated
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BAT54C-7-F
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BAV99,215
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BAT54S-7-F
Diodes Incorporated
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onsemi
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BAT54S,215
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BAS40-04LT1G
onsemi
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MMBD1503-TP
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