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Microchip Technology 1N6642UB2/TR
- Part No.:
- 1N6642UB2/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Diodes
- Package:
- -
- Datasheet:
-
1N6642UB2/TR.pdf
- Description:
- SIGNAL OR COMPUTER DIODE
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
1N6642UB2/TR from Microsemi is a military-qualified ultra-fast switching diode in hermetically sealed "D" package, featuring 100 V breakdown voltage (VBR), 75 V working peak reverse voltage (VRWM), 5.0 ns reverse recovery time (trr), and 2.8 pF junction capacitance at 1.5 V - deployed in high-frequency data lines, RS-232/RS-422 interfaces, and Ethernet 10 Base-T receivers.
For engineers reviewing the 1N6642UB2/TR datasheet, 1N6642UB2/TR pinout, 1N6642UB2/TR application, or 1N6642UB2/TR equivalent, key selection criteria include verified ultra-fast trr, low CJ for signal integrity, MIL-PRF-19500/578 qualification level, and compatibility with through-hole high-density mounting in ruggedized communications hardware.
Technical Context
This diode uses metallurgically bonded construction inside a voidless hermetic glass package, enabling stable operation across –65 °C to +175 °C junction temperature range and supporting surge current up to 2.5 A (8.3 ms half-sine). Its non-cavity design eliminates internal moisture paths critical for aerospace and defense reliability.
The 1N6642UB2/TR delivers consistent forward voltage drop (0.8 V @ 10 mA, 1.2 V @ 100 mA) and tightly controlled reverse leakage (25 nA @ VRWM, 50 µA @ +150 °C), making it suitable for precision timing and fast edge detection where thermal drift and parasitic capacitance must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min) | 100 V - guarantees reliable blocking under transient overvoltage up to rated breakdown threshold |
| VRWM | 75 V - maximum continuous reverse bias usable in 5 V–24 V interface circuits without risk of conduction |
| trr | 5.0 ns - enables clean signal transitions in >100 MHz digital logic and serial data paths |
| CJ @ 1.5 V | 2.8 pF - minimizes capacitive loading on high-speed lines such as RS-422 differential pairs |
| IF(AV) @ +75 °C | 300 mA - supports sustained current in compact through-hole layouts with defined PCB thermal relief |
| VF @ 100 mA | 1.2 V - ensures low power dissipation and predictable voltage clamping in active rectification |
Pinout & Package
Hermetically sealed "D" package (axial leaded, hard glass body); cathode indicated by painted band; leads tin-lead plated (>3% Pb); standard lead length 1.00–1.50 inch (25.4–38.1 mm); body diameter 0.056–0.080 inch (1.42–2.03 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side in clamping or rectification; requires thermal relief pad per MIL-STD-275 |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; tied to reference ground or higher-potential rail in protection circuits |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast recovery | 5.0 ns trr enables use in >100 MHz clock distribution and pulse shaping without tail distortion |
| Low junction capacitance | 2.8 pF at 1.5 V reduces signal reflection and crosstalk in high-speed data line termination |
| Hermetic glass seal | Voidless construction prevents moisture ingress and parameter shift over 20+ year field life |
| MIL-PRF-19500/578 qualified | JANTXV-level screening includes burn-in, temperature cycling, and lot acceptance testing per military spec |
| Metallurgical bond | Direct die-to-lead bonding improves thermal transfer and eliminates wirebond failure modes |
Applications
| RS-232 Transceiver Protection | Ethernet 10 Base-T Receiver Clamping |
|---|---|
Use Scenario: Protecting UART-level serial ports against ESD and cable-induced transients in industrial control panels. IC Role / Device Role / Timing Role: Fast-switching clamp diode placed between TX/RX lines and chassis ground. Use Value: 5.0 ns trr and 2.8 pF CJ prevent signal overshoot while maintaining RS-232 edge fidelity up to 115.2 kbps. |
Use Scenario: Suppressing common-mode surges on twisted-pair Ethernet inputs before PHY ICs. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor in receiver-side front-end protection network. Use Value: 100 V VBR withstands induced lightning surges; hermetic seal ensures long-term stability in humid environments. |
| High-Frequency Data Line Isolation | Switching Core Driver Snubbing |
Use Scenario: Isolating clock or data signals between mixed-voltage domains in avionics backplanes. IC Role / Device Role / Timing Role: Signal steering diode in level-shifted bus arbitration logic. Use Value: Low 1.2 V VF @ 100 mA minimizes propagation delay skew; axial leads simplify manual rework in repairable modules. |
Use Scenario: Snubbing flyback voltage spikes in magnetic core drivers used in legacy radar modulators. IC Role / Device Role / Timing Role: Freewheeling path for inductive energy dissipation during transistor turn-off. Use Value: 2.5 A IFSM handles repetitive surge events; metallurgical bond sustains 175 °C junction temp during burst-mode operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4148WS-7-F | Surface-mount SOD-323 package; 4.0 ns trr; 4.0 pF CJ; commercial-only, no MIL qualification | Limited to automated assembly; unsuitable for JANTXV-requiring programs or high-reliability repair scenarios | Select when board space is constrained and MIL-spec is not mandated |
| 1N6642US | Same die, same specs, but in surface-mount D-5B package; identical electrical parameters and MIL-PRF-19500/578 qualification | Requires reflow-compatible layout; eliminates hand-soldering but increases placement complexity for low-volume builds | Select when transitioning from through-hole to SMT without compromising military qualification or performance |
Compared with 1N4148WS-7-F and 1N6642US, the 1N6642UB2/TR uniquely combines axial-leaded serviceability, hermetic reliability, and JANTXV-level screening - making it irreplaceable in field-maintainable defense electronics where solder joint inspection and long-term parameter stability are mandatory.
Availability
1N6642UB2/TR is available at Aetrix Electronics and suitable for RS-232 interface protection, Ethernet 10 Base-T receiver clamping, and switching core driver snubbing requiring stable component supply across extended product lifecycles.
Supply support for 1N6642UB2/TR 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 Corporation (now part of Microchip Technology) designs high-reliability analog and RF semiconductors for aerospace, defense, and industrial applications.
The 1N6642UB2/TR belongs to Microsemi's legacy MIL-qualified switching diode family, engineered specifically for mission-critical signal integrity in harsh-environment communications and computing systems.
FAQ
What is the reverse recovery time (trr) specification for the 1N6642UB2/TR?
The 1N6642UB2/TR has a reverse recovery time of 5.0 ns under standard test conditions (IF = IR = 10 mA, IR(REC) = 1.0 mA, C = 3 pF, RL = 100 Ω). This value is confirmed in the Microsemi T4-LDS-0218 Rev. 1 datasheet and reflects its suitability for high-speed switching applications including RS-422 and Ethernet 10 Base-T interfaces. The 1N6642UB2/TR maintains this trr across its full qualified temperature range.
Is the 1N6642UB2/TR RoHS compliant?
No, the 1N6642UB2/TR is not RoHS compliant. Its lead finish is tin-lead (>3% Pb), consistent with MIL-PRF-19500/578 requirements for JANTXV-level devices. RoHS-compliant versions (e3 suffix) are only available in commercial-grade variants like 1N6642US-e3, not in the UB2/TR axial-leaded military configuration. The 1N6642UB2/TR remains fully compliant with legacy defense procurement standards.
What does the "UB2/TR" suffix indicate in 1N6642UB2/TR?
The "UB2/TR" suffix identifies the packaging and qualification: "U" denotes the "D" package (axial, hermetic glass), "B2" specifies JAN/JANTXV-level screening per MIL-PRF-19500/578, and "TR" indicates tape-and-reel packaging per EIA-296. This distinguishes it from variants like 1N6642US (surface-mount D-5B) or 1N6642 (bulk-packed commercial version). The 1N6642UB2/TR is traceable to full military screening documentation.
Can the 1N6642UB2/TR replace a 1N4148 in high-reliability designs?
Yes - the 1N6642UB2/TR is explicitly listed as a replacement for 1N4148 in the Microsemi datasheet, offering superior performance: 5.0 ns vs. ~4 ns trr, 2.8 pF vs. ~4 pF CJ, and full MIL-PRF-19500/578 qualification. However, the 1N6642UB2/TR requires axial through-hole mounting and operates across –65 °C to +175 °C, unlike commercial 1N4148. Use the 1N6642UB2/TR where environmental ruggedness and long-term parameter stability are required.
What is the maximum average forward current rating for the 1N6642UB2/TR?
The 1N6642UB2/TR is rated for 300 mA average rectified forward current at +75 °C ambient, with linear derating of 3.0 mA/°C above that temperature. This rating assumes a defined PCB thermal condition: FR4 board, 1-layer 1-oz copper, horizontal orientation, still air, and lead length ≤ 4.75 mm. The 1N6642UB2/TR achieves this using its 150 °C/W junction-to-lead thermal resistance and hermetic package construction.
1N6642UB2/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- -
- Voltage - DC Reverse (Vr) (Max):
- -
- Current - Average Rectified (Io):
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Speed:
- -
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- -
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -
1N6642UB2/TR FAQ
1.How can I place an order for 1N6642UB2/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6642UB2/TR 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 1N6642UB2/TR reliable?
The price and inventory of 1N6642UB2/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6642UB2/TR is usually 5 days.
3.What payment methods are accepted for 1N6642UB2/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6642UB2/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6642UB2/TR?
1N6642UB2/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6642UB2/TR 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 1N6642UB2/TR?
For technical support, including 1N6642UB2/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6642UB2/TR requirements.
6.How does Aetrix verify that 1N6642UB2/TR is sourced from the original manufacturer or authorized distributors?
All 1N6642UB2/TR 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 1N6642UB2/TR meets industry standards.
7.What is the process for return or replacement of 1N6642UB2/TR?
All 1N6642UB2/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N6642UB2/TR, 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 1N6642UB2/TR part is unused and in its original packaging.
Return procedure for 1N6642UB2/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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