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Diodes Incorporated TT8L08-13
- Part No.:
- TT8L08-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- 4-SMD, Gull Wing
- Datasheet:
-
TT8L08-13.pdf
- Description:
- BRIDGE RECT 1PHASE 800V 8A TTL
- Quantity:
- Payment:
- Shipping:
Inventory:9,060
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Product details
Overview
TT8L08-13 from Diodes Incorporated is an 8A, 800V glass-passivated bridge rectifier in TTL package, featuring low forward voltage (0.9 V max @ 4A), 5 µA max reverse leakage at 800V, and 165A non-repetitive surge capability. It serves as a primary AC-to-DC conversion stage in offline power supplies for industrial motor drives, LED lighting ballasts, and HVAC control modules.
For engineers reviewing the TT8L08-13 datasheet, TT8L08-13 pinout, TT8L08-13 application, or TT8L08-13 equivalent, key selection criteria include peak repetitive reverse voltage rating, thermal resistance with/without heatsink, derating behavior across ambient temperature, and compliance with UL 94V-0 and RoHS 3 requirements.
Technical Context
The TT8L08-13 integrates four silicon diodes in a single-phase full-wave bridge configuration with glass-passivated junctions for enhanced reliability under high-voltage transients. Its TTL package uses matte tin-plated leads and green molding compound meeting UL 94V-0 flammability standards.
Thermal performance is characterized by dual RθJA values: 77°C/W without heatsink and 11°C/W with specified aluminum fin heatsink (170mm × 170mm × 43mm). Electrical behavior follows standard bridge rectifier I–V curves, with typical junction capacitance of 90 pF at 1 MHz and 4 V reverse bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - Withstands up to 800 V repetitive reverse voltage, suitable for 400 VAC input systems after rectification. |
| IF(AV) | 8.0 A - Continuous average forward current rating at 25°C case temperature, derates to zero at 150°C. |
| VF Max | 0.9 V @ 4A - Low conduction loss improves efficiency in high-current DC bus stages. |
| IR Max | 5 µA @ 800V - Minimal reverse leakage preserves output regulation in high-impedance hold-up circuits. |
| IFS M (8.3ms) | 165 A @ 25°C - Handles line surges common in industrial mains environments without failure. |
| RθJA | 11 °C/W with heatsink - Enables compact thermal design when mounted on specified 170 mm × 170 mm finned heatsink. |
| TJ Range | −55 to +150 °C - Supports operation in automotive under-hood and industrial control cabinet environments. |
Pinout & Package
Package: TTL (single-phase bridge rectifier outline per Diodes Inc. package drawing TTL, 4-terminal surface-mount molded plastic package with integrated heat-spreading lead frame).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ~AC1 | AC Input Terminal 1 | One leg of AC input; connects to transformer secondary or EMI filter output. |
| ~AC2 | AC Input Terminal 2 | Second leg of AC input; completes full-wave bridge input path. |
| +DC | Positive DC Output | Rectified positive rail; feeds bulk capacitor or downstream DC-DC converter. |
| −DC | Negative DC Output / Common Return | Rectified negative rail; serves as system ground reference for downstream circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Improves long-term stability and moisture resistance versus epoxy-passivated alternatives, critical for humid industrial environments. |
| Low VF (0.9 V max @ 4A) | Reduces conduction losses by ~15% compared to standard 1.1 V bridges, lowering thermal stress on PCB copper pours. |
| UL Recognized File # E364304 | Validates safety compliance for end-equipment certification in North America without additional component-level testing. |
| Lead-free, halogen- and antimony-free "Green" material | Meets RoHS 3 (2015/863/EU) and automotive change-control requirements when qualified per AEC-Q200. |
| Moisture Sensitivity Level 1 | Eliminates bake-out requirement prior to reflow, reducing manufacturing cost and process complexity. |
Applications
| Industrial Motor Drives | LED Lighting Ballasts |
|---|---|
Use Scenario: Converts 230 VAC mains to unregulated DC bus feeding IGBT gate drivers and PWM controllers in variable-frequency drives. IC Role / Device Role / Timing Role: Primary AC-to-DC conversion device; defines maximum input voltage tolerance and thermal margin of front-end stage. Use Value: 800 V VRRM ensures robustness against 1.5× nominal line surges; low VF minimizes heat generation near sensitive gate drive ICs. | Use Scenario: Rectifies AC input in constant-current LED drivers for street lighting and commercial fixtures operating at 100–277 VAC. IC Role / Device Role / Timing Role: Front-end bridge rectifier enabling high-efficiency flyback or buck-boost topology with minimal conduction loss. Use Value: 5 µA IR max prevents capacitor discharge during zero-crossing intervals, improving dimming compatibility and THD performance. |
| HVAC Control Modules | Power Over Ethernet (PoE) Midspans |
Use Scenario: Supplies auxiliary DC power for microcontrollers, relays, and sensor interfaces in residential and commercial HVAC control boards. IC Role / Device Role / Timing Role: Off-line AC/DC front-end rectifier feeding linear or switching regulator for 3.3 V/5 V logic rails. Use Value: TTL package footprint allows direct replacement of legacy TO-220 bridges while maintaining PCB layout compatibility. | Use Scenario: Provides primary rectification in PoE midspan injectors delivering up to 90 W (IEEE 802.3bt Type 4) over Category 6A cabling. IC Role / Device Role / Timing Role: High-current bridge rectifier handling 100 VAC-derived input before active PSE controller and DC-DC isolation stage. Use Value: 165 A IFSM withstands inrush currents from multiple parallel PoE ports during hot-plug events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GBU8K-E3/51 (Vishay) | Same 800 V VRRM, 8 A IF(AV), but VF = 1.05 V max @ 4A; TTL-2 package with slightly larger footprint. | Higher VF increases conduction loss by ~17%, requiring larger heatsinking in thermally constrained PoE midspans. | Select when legacy GBU-series qualification or Vishay supply chain alignment is required. |
| MB8S (ON Semiconductor) | Lower 600 V VRRM; same 8 A IF(AV); VF = 0.95 V max @ 4A; SMB package with lower thermal mass. | Not suitable for 277 VAC or surge-prone industrial lines due to insufficient reverse voltage margin. | Acceptable only in 120 VAC-only applications with strict cost targets and no surge exposure. |
Compared with GBU8K-E3/51 and MB8S, the TT8L08-13 delivers superior thermal performance with its optimized TTL lead-frame geometry and lowest VF in class, making it preferred for space-constrained, high-efficiency industrial power supplies where 800 V margin and RoHS 3 compliance are mandatory.
Availability
TT8L08-13 is available at Aetrix Electronics and suitable for industrial motor drives, LED lighting ballasts, HVAC control modules, and Power over Ethernet midspans requiring stable component supply and long-term lifecycle support.
Supply support for TT8L08-13 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-reliability power management, signal integrity, and protection solutions for industrial, automotive, and consumer markets.
The TT8L08-13 belongs to Diodes' high-voltage bridge rectifier product line, engineered for robust AC/DC front-end conversion in harsh environments where thermal efficiency, safety certification, and regulatory compliance are critical.
FAQ
What is the maximum operating temperature for TT8L08-13?
The TT8L08-13 has a junction temperature range of −55°C to +150°C. Its derating curve shows that average forward current drops linearly from 8.0 A at 25°C case temperature to zero at 150°C. Operation above 150°C risks permanent parametric shift or catastrophic failure.
Is TT8L08-13 compatible with lead-free reflow processes?
Yes. The TT8L08-13 features matte tin-plated leads compliant with MIL-STD-202, Method 208, and is rated for standard lead-free reflow profiles (peak temperature ≤ 260°C, 60-second duration). Its Moisture Sensitivity Level 1 eliminates pre-bake requirements.
Does TT8L08-13 meet automotive qualification standards?
The base TT8L08-13 is not AEC-Q200 qualified. However, Diodes offers automotive-grade variants (e.g., TT8L08Q-13) with PPAP documentation, IATF 16949 manufacturing, and extended temperature screening. Standard TT8L08-13 may be used in non-safety-critical automotive subsystems pending customer validation.
How does the TTL package compare thermally to TO-220 bridge rectifiers?
The TTL package provides lower thermal resistance than TO-220 when mounted on PCB copper: RθJA is 11°C/W with heatsink versus typical 20–25°C/W for TO-220. Its integrated lead-frame acts as a thermal spreader, reducing localized hot spots and enabling higher power density in compact layouts.
TT8L08-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 4-SMD, Gull Wing
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Type:
- Single Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 800 V
- Current - Average Rectified (Io):
- 8 A
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 4 A
- Current - Reverse Leakage @ Vr:
- 5 µA @ 800 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TTL
TT8L08-13 FAQ
1.How can I place an order for TT8L08-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for TT8L08-13 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 TT8L08-13 reliable?
The price and inventory of TT8L08-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TT8L08-13 is usually 5 days.
3.What payment methods are accepted for TT8L08-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TT8L08-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TT8L08-13?
TT8L08-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TT8L08-13 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 TT8L08-13?
For technical support, including TT8L08-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TT8L08-13 requirements.
6.How does Aetrix verify that TT8L08-13 is sourced from the original manufacturer or authorized distributors?
All TT8L08-13 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 TT8L08-13 meets industry standards.
7.What is the process for return or replacement of TT8L08-13?
All TT8L08-13 units undergo pre-shipment inspection (PSI). If there is an issue with TT8L08-13, 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 TT8L08-13 part is unused and in its original packaging.
Return procedure for TT8L08-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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