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Diodes Incorporated 6A8-T
- Part No.:
- 6A8-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- R-6, Axial
- Datasheet:
-
6A8-T.pdf
- Description:
- DIODE GEN PURP 800V 6A R-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,418
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Product details
Overview
6A8-T from Diodes Incorporated is a 6.0A, 800V peak repetitive reverse voltage axial-lead silicon rectifier diode in R-6 molded plastic package, with 0.90V max forward voltage at 6.0A DC and 400A surge capability, used in AC/DC power supplies for industrial motor drives.
For engineers reviewing the 6A8-T datasheet, 6A8-T pinout, 6A8-T application, or 6A8-T equivalent, key selection criteria include VRRM=800V, I(AV)=6.0A at 75°C, VFM=0.90V @6A, IFSM=400A (8.3ms), and IRM=10µA @25°C - all critical for high-reliability offline rectification under thermal and surge stress.
Technical Context
This device operates as a single-phase, half-wave silicon rectifier optimized for line-frequency (60Hz) operation with resistive or inductive loads. Its R-6 axial package supports ≥9.5mm lead length for PCB through-hole mounting and thermal derating per Figure 1 in DS28009.
The junction temperature range spans –65°C to +175°C, enabling use in harsh ambient environments. Reverse leakage remains ≤10µA at 25°C and ≤100µA at 100°C under rated blocking voltage, ensuring stable DC bus hold-up in unregulated supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - Maximum repetitive peak reverse voltage; defines safe AC input voltage limit before avalanche breakdown. |
| I(AV) | 6.0 A @ TA = +75°C - Average forward current rating with 9.5 mm lead length; sets continuous power handling in open-frame designs. |
| VFM | 0.90 V @ 6.0 A DC - Forward voltage drop; directly determines conduction loss (5.4 W typical at full load) and thermal design margin. |
| IFSM | 400 A (8.3 ms half-sine) - Non-repetitive surge current capability; withstands inrush into capacitive input filters without failure. |
| IRM | 10 µA @ 25°C - Max reverse leakage at rated VRRM; ensures minimal standby power loss and stable DC output under light/no-load conditions. |
| TJ Range | –65°C to +175°C - Operating junction temperature range; supports deployment in automotive engine bays or industrial enclosures without forced cooling. |
Pinout & Package
Package: R-6 molded plastic case (UL 94V-0), axial leads, cathode indicated by color band, tin-plated terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked lead) | AC input / positive half-cycle entry | Connects to transformer secondary or bridge input; carries full forward current during conduction phase. |
| Cathode (banded lead) | DC output / rectified voltage source | Delivers pulsating DC to filter capacitor; polarity marking prevents reverse connection in series/parallel arrays. |
Key Features
| Feature | Design Value |
|---|---|
| High surge current capability | 400A IFSM enables reliable startup into large electrolytic input capacitors without degradation. |
| Low forward voltage drop | 0.90V VFM at 6A reduces conduction losses by ~15% vs. legacy 1.1V rectifiers, lowering heatsink requirements. |
| Low reverse leakage | 10µA IRM at 25°C minimizes no-load power dissipation in standby-mode power supplies. |
| RoHS-compliant lead finish | Tin-plated axial leads meet EU RoHS 2015/863/EU and support Pb-free reflow and hand-soldering processes. |
Applications
| Industrial AC/DC Power Supplies | Motor Drive Input Rectification |
|---|---|
Use Scenario: Off-line rectification in 3-phase rectifier front-ends feeding VFD DC buses. IC Role / Device Role / Timing Role: Discrete power diode performing uncontrolled half-wave rectification of line-frequency AC. Use Value: 800V VRRM safely handles 400VAC line-to-line surges; 400A IFSM absorbs capacitor charging transients during power-up. |
Use Scenario: Single-phase rectifier stage in HVAC blower control modules. IC Role / Device Role / Timing Role: Main AC input rectifier converting 230VAC mains to unregulated DC for buck-derived DC/DC stages. Use Value: 6.0A I(AV) supports continuous 500W output; 0.90V VFM limits thermal rise in compact enclosed housings. |
| LED Driver Input Stages | Uninterruptible Power Supply (UPS) Charging Circuits |
Use Scenario: Input rectification in constant-current LED drivers for street lighting. IC Role / Device Role / Timing Role: Primary-side silicon rectifier delivering bulk DC to PFC controller ICs. Use Value: –65°C to +175°C TJ range ensures outdoor reliability across seasonal extremes; RoHS compliance meets municipal procurement mandates. |
Use Scenario: Battery charger input stage in line-interactive UPS systems. IC Role / Device Role / Timing Role: Half-wave rectifier supplying DC to battery float-charging circuitry during normal operation. Use Value: 10µA IRM at 25°C prevents parasitic discharge during long-term grid-connected standby; axial R-6 form factor simplifies manual replacement in field service. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage silicon rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GBU8K (ON Semiconductor) | Same 800V VRRM, 6A I(AV), but GBU package (4-pin bridge); higher VFM (1.05V) and larger footprint. | Designed for full-wave bridge use; requires PCB redesign if replacing discrete 6A8-T in half-wave or single-diode configurations. | Select only when full-wave rectification and board space allow integrated bridge layout. |
| ES1J (Vishay) | Lower 600V VRRM, same 6A I(AV), SMA surface-mount package; VFM=0.95V, IRM=5µA @25°C. | Not suitable for 400VAC+ inputs; intended for low-profile, automated assembly where axial leads are prohibited. | Choose only for space-constrained, lower-input-voltage designs with SMT process requirements. |
Compared with GBU8K and ES1J, the 6A8-T provides optimal balance of 800V standoff, axial through-hole reliability, and 0.90V conduction efficiency - making it preferred for serviceable, thermally robust, medium-power offline rectification where leaded mounting and surge resilience are prioritized.
Availability
6A8-T is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, motor drive input rectification, LED driver input stages, and UPS charging circuits requiring stable component supply and long-lifecycle support.
Supply support for 6A8-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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
The 6A05–6A10 series belongs to Diodes' general-purpose silicon rectifier product line, engineered for cost-effective, high-surge-capability AC/DC conversion in industrial, appliance, and infrastructure power systems.
FAQ
What is the maximum allowable ambient temperature for continuous 6.0A operation?
The 6A8-T is rated for I(AV) = 6.0A at TA = +75°C with 9.5mm lead length, as defined in Figure 1 of DS28009. At higher ambient temperatures, derating is required - e.g., ~4.5A at +100°C. Thermal performance depends on PCB copper area, airflow, and lead length; no internal thermal shutdown circuitry is present.
Can the 6A8-T be used in full-wave bridge configurations?
Yes - two 6A8-T diodes can be paired with two additional diodes to construct a discrete full-wave bridge, or four units may be used in a center-tapped configuration. However, it is not a monolithic bridge; each device functions as a single anode-cathode rectifier and must be externally wired per application schematics.
Is the 6A8-T suitable for high-frequency switching applications like PFC or SMPS primary rectification?
No - the 6A8-T is optimized for 50/60Hz line-frequency rectification. Its reverse recovery time is unspecified in DS28009 and not characterized for >1kHz operation. For high-frequency use, fast-recovery or ultrafast diodes such as FFPF6065B or MUR1620CT are required.
Does the "NOT RECOMMENDED FOR NEW DESIGN" note apply to the 6A8-T?
Yes - the datasheet footnote states "NOT RECOMMENDED FOR NEW DESIGN" for the entire 6A05–6A10 family. This reflects Diodes Incorporated's strategic shift toward higher-efficiency, lower-VF alternatives (e.g., Schottky or SiC diodes) for new projects, though the 6A8-T remains fully supported for existing designs and legacy replacements.
6A8-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- R-6, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 800 V
- Current - Average Rectified (Io):
- 6A
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 6 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 800 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- R-6
- Operating Temperature - Junction:
- -65°C ~ 175°C
6A8-T FAQ
1.How can I place an order for 6A8-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 6A8-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 6A8-T reliable?
The price and inventory of 6A8-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 6A8-T is usually 5 days.
3.What payment methods are accepted for 6A8-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 6A8-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 6A8-T?
6A8-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 6A8-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 6A8-T?
For technical support, including 6A8-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 6A8-T requirements.
6.How does Aetrix verify that 6A8-T is sourced from the original manufacturer or authorized distributors?
All 6A8-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 6A8-T meets industry standards.
7.What is the process for return or replacement of 6A8-T?
All 6A8-T units undergo pre-shipment inspection (PSI). If there is an issue with 6A8-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 6A8-T part is unused and in its original packaging.
Return procedure for 6A8-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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