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Diodes Incorporated TT4TM
- Part No.:
- TT4TM
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- 4-SMD, Gull Wing
- Datasheet:
-
TT4TM.pdf
- Description:
- BRIDGE RECT 1PHASE 1KV 4A TTL
- Quantity:
- Payment:
- Shipping:
Inventory:9,116
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Product details
Overview
TT4TM from Diodes Incorporated is a 4A fast recovery bridge rectifier in TTL package, rated for 1000V repetitive peak reverse voltage, with 1.3V max forward voltage at 4A and 500ns reverse recovery time. It delivers reliable AC-to-DC conversion in offline power supplies, LED drivers, and industrial motor controls where high-voltage blocking and low conduction loss are critical.
For engineers reviewing the TT4TM datasheet, TT4TM pinout, TT4TM application, or TT4TM equivalent, key selection criteria include its 1000V VRRM, 4A average forward current capability (with heatsink), 5µA leakage at 1000V/25°C, thermal resistance of 5°C/W (junction-to-case), and TTL package compatibility with standard PCB layouts.
Technical Context
The TT4TM integrates four silicon diodes in a single-phase full-wave bridge configuration with glass-passivated junctions, enabling fast 500ns reverse recovery for reduced switching losses in high-frequency rectification. Its TTL package features matte tin-plated leads and UL 94V-0 molding compound, supporting lead-free reflow assembly.
Thermal performance is defined by RθJC = 5°C/W and RθJL = 8°C/W, with derating curves specifying 4A operation up to +110°C case temperature when heatsinked and 1.2A at +130°C without. Junction capacitance is 42pF at 1MHz/4V reverse bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - Withstands peak reverse voltages up to 1000V in AC line applications without breakdown |
| IF(AV) | 4 A - Sustains 4A average forward current with heatsink at TC = +110°C |
| VF Max | 1.3 V - Limits conduction loss to ≤5.2W at 4A, reducing thermal stress in compact designs |
| trr | 500 ns - Enables efficient operation in 20–100kHz SMPS rectification stages |
| IR Max | 5 µA - Ensures minimal leakage current at full 1000V blocking, critical for high-impedance hold-up circuits |
| RθJC | 5 °C/W - Allows direct thermal path to heatsink, supporting stable operation under continuous load |
| CT | 42 pF - Low junction capacitance minimizes EMI generation during commutation |
Pinout & Package
TT4TM uses the TTL (Through-Hole Lead) package: 4-pin, single-phase bridge configuration with molded plastic body, 10.2mm × 9.9mm footprint, and 1.55mm typical height. Leads are matte tin-plated, solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC1 | Input AC terminal 1 | One AC input node for full-wave bridge; connects to transformer secondary or AC line |
| AC2 | Input AC terminal 2 | Second AC input node; completes AC input pair for bidirectional conduction |
| + (Anode Output) | Positive DC output | Full-wave rectified positive output node; connects to bulk capacitor or downstream regulator |
| – (Cathode Output) | Negative DC output / Common return | Full-wave rectified negative/common return; referenced to system ground or negative rail |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Enhances long-term reliability and moisture resistance in humid or thermally cycled environments |
| UL 94V-0 "Green" molding compound | Meets flammability safety standards without bromine/antimony; supports RoHS 3 and automotive change control |
| Lead-free, halogen-free, antimony-free | Complies with EU Directive 2015/863/EU; eliminates hazardous substances in end-of-life disposal |
| Moisture Sensitivity Level 1 | Eliminates bake requirements before reflow; compatible with standard SMT assembly lines |
Applications
| Industrial AC-DC Power Supplies | LED Driver Input Rectification |
|---|---|
Use Scenario: Off-line 85–265VAC input stage in DIN-rail mounted power supplies for PLCs and sensors. IC Role / Device Role / Timing Role: Full-wave bridge rectifier converting AC mains to unregulated DC bus prior to PFC and DC-DC conversion. Use Value: 1000V VRRM provides 2× safety margin over 265VAC peak (375V); 4A rating supports ≥60W output with margin. | Use Scenario: Input rectification in constant-current LED drivers for street lighting and high-bay fixtures. IC Role / Device Role / Timing Role: Primary AC-to-DC conversion stage feeding buck or flyback controller ICs. Use Value: 500ns trr reduces switching noise coupling into sensitive current-sense paths; low CT minimizes EMI filter size. |
| Motor Control Auxiliary Power | Appliance Power Entry Modules |
Use Scenario: Auxiliary 12V/24V supply generation in HVAC blower motor inverters and pump controllers. IC Role / Device Role / Timing Role: Isolated auxiliary rectifier on transformer secondary, powering gate drivers and MCU logic. Use Value: 5µA IR at 1000V ensures minimal standby loss; RθJC = 5°C/W enables compact heatsinking on small PCBs. | Use Scenario: Mains input rectification in white goods (refrigerators, washing machines) with integrated EMI filtering. IC Role / Device Role / Timing Role: Primary bridge rectifier in Class I or II isolated power entry modules. Use Value: TTL package allows through-hole mounting with mechanical robustness; UL 94V-0 material meets appliance fire safety standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GBU4K (ON Semiconductor) | Same 1000V VRRM, 4A IF(AV), but 1.1V VF typ and 750ns trr; GBU package (larger footprint) | Higher forward drop at 4A increases conduction loss; slower recovery limits high-frequency use | Prefer TT4TM where layout space is constrained or trr < 600ns is required |
| DB104 (Fairchild/ON) | 1000V VRRM, 1.5A IF(AV), 1.1V VF, 1.5µA IR; smaller DO-15 package | Lower current rating requires parallel devices for 4A loads; not suitable for same thermal envelope | Select TT4TM when single-device 4A capability and TTL-mounting are mandatory |
Compared with GBU4K and DB104, TT4TM uniquely combines 4A current handling, 500ns recovery, and TTL package in one device-enabling compact, high-efficiency rectification without paralleling or oversized footprints.
Availability
TT4TM is available at Aetrix Electronics and suitable for industrial AC-DC power supplies, LED driver input rectification, and motor control auxiliary power requiring stable component supply and long-lifecycle support.
Supply support for TT4TM 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.
The TT4TM belongs to Diodes' fast recovery bridge rectifier product line, engineered for cost-sensitive, high-voltage AC-DC conversion in industrial, lighting, and appliance applications where thermal efficiency and regulatory compliance are essential.
FAQ
What is the maximum operating temperature for TT4TM without a heatsink?
The TT4TM supports an average forward current of 1.2A at a case temperature of +130°C without a heatsink, as specified in the derating curve. Its operating junction temperature range extends from –55°C to +150°C, and thermal resistance junction-to-lead is 8°C/W. For sustained 4A operation, a heatsink maintaining TC ≤ +110°C is required.
Is TT4TM suitable for automotive applications?
TT4TM is not AEC-Q200 qualified out of the box, but Diodes Incorporated offers automotive-grade variants with PPAP capability and IATF 16949 manufacturing. The standard TT4TM uses halogen- and antimony-free "Green" materials and RoHS 3 compliance, making it suitable for non-safety-critical automotive subsystems pending customer qualification.
How does the TTL package differ from GBU or KBP packages?
The TTL package measures 10.2mm × 9.9mm with 4.9mm lead spacing and is optimized for through-hole PCB mounting with high mechanical strength. Unlike larger GBU (17.5mm × 12.5mm) or KBP (15.5mm × 10.5mm) packages, TTL offers tighter footprint and lower profile while maintaining 4A current capacity and thermal performance via optimized leadframe design.
What is the surge current rating of TT4TM and how is it tested?
TT4TM has a peak forward surge current rating of 100A for a single 8.3ms half-sine wave at TJ = +25°C, corresponding to I²t = 41.5A²s. This rating is validated per JEDEC standards and reflects capability to withstand brief inrush events such as cold-start capacitor charging or lightning-induced transients in AC input stages.
TT4TM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 4-SMD, Gull Wing
- Packaging:
- Bulk
- Product Status:
- Active
- Diode Type:
- Single Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 1 kV
- Current - Average Rectified (Io):
- 4 A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 4 A
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1000 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TTL
TT4TM FAQ
1.How can I place an order for TT4TM through Aetrix?
Please submit a Request for Quotation (RFQ) for TT4TM 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 TT4TM reliable?
The price and inventory of TT4TM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TT4TM is usually 5 days.
3.What payment methods are accepted for TT4TM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TT4TM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TT4TM?
TT4TM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TT4TM 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 TT4TM?
For technical support, including TT4TM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TT4TM requirements.
6.How does Aetrix verify that TT4TM is sourced from the original manufacturer or authorized distributors?
All TT4TM 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 TT4TM meets industry standards.
7.What is the process for return or replacement of TT4TM?
All TT4TM units undergo pre-shipment inspection (PSI). If there is an issue with TT4TM, 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 TT4TM part is unused and in its original packaging.
Return procedure for TT4TM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TT4TM Tags
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