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Microchip Technology 1N6077US
- Part No.:
- 1N6077US
- Manufacturer:
- Microchip Technology
- Category:
- Single Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
1N6077US.pdf
- Description:
- DIODE GEN PURP 100V 6A D-5B
- Quantity:
- Payment:
- Shipping:
Inventory:8,153
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Product details
Overview
1N6077US from Microsemi is an ultrafast recovery surface-mount glass power rectifier diode rated for 100 V working peak reverse voltage, 6.0 A average forward current at TEC = 70°C, and 30 ns reverse recovery time. It features voidless hermetic glass packaging with Category I metallurgical bonds and is used in high-reliability switching power supplies requiring low forward loss and robust surge handling.
For engineers reviewing the 1N6077US datasheet, 1N6077US pinout, 1N6077US application, or 1N6077US equivalent, key selection criteria include its 100 V VRWM rating, 1.76 V forward voltage at 18.8 A pulsed test current, 75 A peak surge capability, and E-MELF (D-5B) package suitability for military-grade thermal and radiation-hardened designs.
Technical Context
The 1N6077US operates as a unidirectional power rectifier with controlled avalanche capability and low thermal resistance (8.5°C/W). Its ultrafast 30 ns trr enables efficient high-frequency switching in DC-DC converters and SMPS topologies where fast turn-off minimizes switching losses.
Designed for surface-mount assembly on thermally demanding PCBs, it uses tungsten slugs and copper end caps with Sn/Pb finish, supporting solder reflow up to 260°C for 10 s. The device maintains stable operation across –65°C to +155°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 100 V - Maximum continuous reverse voltage before breakdown under operating temperature range |
| IF(AV) @ TEC=70°C | 6.0 A - Sustained DC output current capability with external heatsinking at case temperature |
| VF @ 18.8 A | 1.76 V - Forward conduction loss at pulsed test condition, directly impacting efficiency in high-current pulses |
| trr | 30 ns - Time to recover blocking state after forward conduction, critical for >100 kHz switching |
| IFSM (8.3 ms) | 75 A - Non-repetitive surge current handling, enabling robustness against line transients |
| RθJEC | 8.5°C/W - Thermal resistance from junction to external case, defining heatsink sizing requirements |
| IR @ VRWM | 5.0 μA - Reverse leakage at rated voltage, ensuring low standby power loss in high-impedance circuits |
Pinout & Package
Package: E-MELF (also designated D-5B), hermetically sealed voidless glass with tungsten slugs and copper end caps (Sn/Pb finish); cathode indicated by band; polarity-critical for rectification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to input side of bridge or transformer secondary; must withstand full surge current |
| Cathode | Forward current exit point | Marked by band; connects to output filter capacitor or load return; defines output polarity |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates internal delamination risk and moisture ingress, enabling 20+ year field life in aerospace environments |
| Category I metallurgical bond | Guarantees mechanical integrity under shock/vibration and thermal cycling per MIL-PRF-19500 |
| Triple-layer passivation | Prevents surface leakage and corrosion on glass-metal interface, sustaining IR stability over lifetime |
| Controlled avalanche capability | Allows safe clamping of inductive kickback without destructive failure, reducing need for external snubbers |
| Inherent radiation hardness | Validated per MicroNote 050 for total ionizing dose (TID) tolerance in space applications |
Applications
| Avionics Power Conversion | Military Radar Transmitter Supplies |
|---|---|
Use Scenario: DC-DC conversion in airborne mission computers requiring zero-failure operation over 15-year service life. IC Role / Device Role / Timing Role: Primary output rectifier in resonant LLC converter stage delivering 28 V/5 A regulated bus. Use Value: 30 ns trr and 75 A IFSM ensure minimal switching loss and immunity to radar pulse-induced line surges. | Use Scenario: High-efficiency pulsed power supply for magnetron biasing in shipboard radar systems. IC Role / Device Role / Timing Role: Fast-recovery rectifier in modulator-stage choke-input filter, handling 100 Hz–1 kHz burst duty cycles. Use Value: 8.5°C/W RθJEC and controlled avalanche enable reliable operation without forced air cooling in confined enclosures. |
| Satellite Solar Array Regulators | Tactical Vehicle DC Distribution |
Use Scenario: MPPT charge controller front-end rectification in LEO satellite power management units. IC Role / Device Role / Timing Role: Input-side synchronous rectifier replacement in buck-derived regulator handling 100 V solar string inputs. Use Value: Radiation-hardened construction and –65°C to +155°C operation support unheated deployment in deep-space thermal vacuum. | Use Scenario: On-board 24 V DC distribution system in armored ground vehicles subject to extreme vibration and EMI. IC Role / Device Role / Timing Role: Output rectifier in isolated flyback converter powering vehicle C4ISR subsystems. Use Value: Voidless glass seal and Category I bond prevent failure during 50 g shock events and thermal shock from desert-to-arctic transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N6076US | Same package and trr, but rated for 50 V VRWM instead of 100 V | Lower voltage headroom limits use in 48 V telecom or industrial SMPS with tighter input ranges | Select only when system max reverse voltage ≤50 V and higher VRWM margin is unnecessary |
| 1N6078US | Same package and trr, but rated for 150 V VRWM and identical 6.0 A IO | Enables use in 100–120 VAC-fed supplies with higher safety margins and transient tolerance | Choose when design requires ≥120 V reverse standoff or compliance with MIL-STD-461 CS115 |
Compared with 1N6076US and 1N6078US, the 1N6077US provides optimal balance of 100 V VRWM headroom and 6.0 A output capacity in the E-MELF package-making it the preferred choice for 24–48 V output, 100 V input SMPS in defense platforms where both voltage margin and thermal performance are constrained.
Availability
1N6077US is available at Aetrix Electronics and suitable for avionics power conversion, military radar transmitter supplies, and satellite solar array regulators requiring stable component supply across extended product lifecycles.
Supply support for 1N6077US 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
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N6073US–1N6081US series was developed to meet MIL-PRF-19500 Class H/K requirements for ultrafast rectification in mission-critical power systems where hermeticity, radiation tolerance, and surge resilience are non-negotiable.
FAQ
What is the maximum junction temperature rating for the 1N6077US?
The 1N6077US has a specified junction temperature range of –65°C to +155°C. This wide operating envelope supports deployment in uncontrolled environments such as aircraft bays, satellite payload compartments, and tracked vehicle engine compartments. The 1N6077US maintains electrical integrity across this full range when mounted per recommended pad layout and thermal interface guidelines.
Does the 1N6077US have a cathode band marking?
Yes, the 1N6077US uses a visible cathode band on the glass body to indicate polarity. This band aligns with industry-standard MELF orientation conventions and must be verified during automated optical inspection (AOI) prior to reflow. The 1N6077US cathode band placement is consistent across all E-MELF devices in the 1N6076US–1N6078US group.
Is the 1N6077US compatible with lead-free reflow profiles?
The 1N6077US is qualified for Sn/Pb finish and rated for 260°C for 10 seconds-compatible with standard leaded reflow. While not officially qualified for Pb-free processes, its glass-metal hermetic seal and tungsten slug construction tolerate peak temperatures up to 260°C. For Pb-free assembly, Microsemi recommends validation per J-STD-020 and thermal profiling per the 1N6077US-specific reflow guide.
What is the reverse recovery time (trr) specification for the 1N6077US?
The 1N6077US has a maximum reverse recovery time of 30 ns, measured at IF = 0.5 A, IRM = 1.0 A, and IR(REC) = 0.25 A. This value is guaranteed across the full –65°C to +155°C junction temperature range and enables efficient operation in switching power supplies operating above 200 kHz. The 1N6077US trr remains stable due to its controlled carrier lifetime design.
Can the 1N6077US be substituted with an axial-lead version?
No direct axial-lead substitution exists for the 1N6077US because the "US" suffix denotes surface-mount E-MELF packaging. Axial equivalents (e.g., 1N6077) use different mechanical construction, thermal paths, and screening standards. Substitution would require PCB redesign, thermal analysis, and requalification per MIL-PRF-19500-so the 1N6077US must be used as specified in surface-mount designs.
1N6077US Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SQ-MELF, E
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 6A
- Voltage - Forward (Vf) (Max) @ If:
- 1.76 V @ 18.8 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 30 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 100 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D-5B
- Operating Temperature - Junction:
- -65°C ~ 155°C
1N6077US FAQ
1.How can I place an order for 1N6077US through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6077US 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 1N6077US reliable?
The price and inventory of 1N6077US are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6077US is usually 5 days.
3.What payment methods are accepted for 1N6077US?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6077US transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6077US?
1N6077US orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6077US 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 1N6077US?
For technical support, including 1N6077US datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6077US requirements.
6.How does Aetrix verify that 1N6077US is sourced from the original manufacturer or authorized distributors?
All 1N6077US 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 1N6077US meets industry standards.
7.What is the process for return or replacement of 1N6077US?
All 1N6077US units undergo pre-shipment inspection (PSI). If there is an issue with 1N6077US, 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 1N6077US part is unused and in its original packaging.
Return procedure for 1N6077US:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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