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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Microchip Technology 1N6642UB2R/TR

Name: 1N6642UB2R/TR
Brand: Microchip Technology
SKU: 1N6642UB2R/TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N6642UB2R/TR

Manufacturer:: Microchip Technology

Category:: Single Diodes

Package:: -

Datasheet:: 1N6642UB2R/TR.pdf

Description:: SIGNAL OR COMPUTER DIODE

Quantity:: RFQ Add To RFQ list

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Product details

Overview

1N6642UB2R/TR from Microsemi is a military-qualified ultra-fast switching diode in hermetically sealed "D" package, with 100 V breakdown voltage (V_BR), 75 V working peak reverse voltage (V_RWM), 5.0 ns reverse recovery time (t_rr), and 2.8 pF junction capacitance at 1.5 V. It serves as a high-speed signal routing and clamping device in RS-232/RS-422 interface networks and Ethernet 10 Base-T receivers.

For engineers reviewing the 1N6642UB2R/TR datasheet, 1N6642UB2R/TR pinout, 1N6642UB2R/TR application, or 1N6642UB2R/TR equivalent, this part delivers verified ultra-fast recovery, low capacitance, and MIL-PRF-19500/578 qualification for ruggedized data-line protection and core driver switching in aerospace and industrial embedded systems.

Technical Context

This diode employs metallurgically bonded construction inside a voidless hermetic glass package, enabling stable operation from −65 °C to +175 °C. Its non-cavity design and tin-lead plated terminals support reliable solderability and thermal performance with R_θJL = 150 °C/W and R_θJA = 250 °C/W under defined PCB conditions.

Rated for 300 mA average forward current at +75 °C (derated above), it sustains 2.5 A peak surge current (8.3 ms half-sine) and exhibits ≤1.2 V forward voltage at 100 mA - critical for low-loss signal path integrity in high-frequency digital interfaces.

Key Specifications

Parameter	Value and Actual Design Meaning
V_BR (min)	100 V - ensures robust reverse blocking in 75 V working peak reverse voltage (V_RWM) applications
t_rr	5.0 ns - enables clean edge transitions in >10 MHz digital signal routing and clamping
C_J @ 1.5 V	2.8 pF - minimizes capacitive loading on high-speed data lines like RS-422 and 10 Base-T
V_F @ 100 mA	1.2 V - limits forward conduction loss in fast-switching core drivers and logic-level translators
I_O @ +75 °C	300 mA - supports sustained current in compact, thermally constrained through-hole layouts
T_J/T_STG	−65 to +175 °C - meets extended temperature requirements for avionics and downhole electronics

Pinout & Package

Hermetically sealed "D" package (axial lead, hard glass body); cathode indicated by band; leads are tin-lead plated (>3% Pb), flexible for through-hole mounting.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to source-side of signal path; accepts up to 2.5 A surge during transient events
Cathode	Forward current exit / reverse blocking terminal	Banded end; referenced to ground or return path; withstands 100 V reverse bias without breakdown

Key Features

Feature	Design Value
Ultra-fast recovery time	5.0 ns t_rr enables sub-10 ns edge fidelity in serial data line clamping and pulse shaping
Low junction capacitance	2.8 pF at 1.5 V reduces signal distortion and crosstalk in multi-drop RS-422 bus nodes
Hermetic glass package	Voidless seal ensures long-term reliability in high-humidity, high-vibration, and radiation-prone environments
MIL-PRF-19500/578 qualification	JANTXV-level screening available - required for flight-critical timing and interface circuits in defense platforms

Applications

RS-232/RS-422 Interface Protection	Ethernet 10 Base-T Receiver Clamping
Use Scenario: Bidirectional ESD and overvoltage protection on differential data pairs in industrial serial gateways. IC Role / Device Role / Timing Role: Signal-level clamping diode placed across receiver inputs to limit transients to safe voltage rails. Use Value: 2.8 pF capacitance avoids signal rise-time degradation; 5.0 ns t_rr prevents false triggering during fast edge transitions.	Use Scenario: Input stage protection for 10 Mbps Ethernet PHY receivers operating in noisy factory-floor environments. IC Role / Device Role / Timing Role: Fast-switching clamp limiting common-mode surges to ±75 V while preserving signal integrity. Use Value: 100 V V_BR provides margin above 75 V V_RWM; hermetic seal prevents moisture-induced leakage drift.
Switching Core Drivers	High-Frequency Data Lines
Use Scenario: Drive termination and flyback energy recirculation in magnetic core memory read/write circuits. IC Role / Device Role / Timing Role: High-speed freewheeling path for inductive kickback suppression in legacy core drivers. Use Value: 2.5 A I_FSM handles repetitive surge events; metallurgical bond ensures cycle-life stability under 100 kHz switching.	Use Scenario: Signal conditioning and level translation in high-density backplane interconnects with tight timing budgets. IC Role / Device Role / Timing Role: Low-capacitance steering diode for multiplexed address/data bus isolation. Use Value: 1.2 V V_F at 100 mA minimizes voltage drop in logic-level translation paths; axial leads simplify manual rework.

RS-232/RS-422 Interface Protection

Ethernet 10 Base-T Receiver Clamping

Use Scenario: Bidirectional ESD and overvoltage protection on differential data pairs in industrial serial gateways.

IC Role / Device Role / Timing Role: Signal-level clamping diode placed across receiver inputs to limit transients to safe voltage rails.

Use Value: 2.8 pF capacitance avoids signal rise-time degradation; 5.0 ns t_rr prevents false triggering during fast edge transitions.

Use Scenario: Input stage protection for 10 Mbps Ethernet PHY receivers operating in noisy factory-floor environments.

IC Role / Device Role / Timing Role: Fast-switching clamp limiting common-mode surges to ±75 V while preserving signal integrity.

Use Value: 100 V V_BR provides margin above 75 V V_RWM; hermetic seal prevents moisture-induced leakage drift.

Switching Core Drivers

High-Frequency Data Lines

Use Scenario: Drive termination and flyback energy recirculation in magnetic core memory read/write circuits.

IC Role / Device Role / Timing Role: High-speed freewheeling path for inductive kickback suppression in legacy core drivers.

Use Value: 2.5 A I_FSM handles repetitive surge events; metallurgical bond ensures cycle-life stability under 100 kHz switching.

Use Scenario: Signal conditioning and level translation in high-density backplane interconnects with tight timing budgets.

IC Role / Device Role / Timing Role: Low-capacitance steering diode for multiplexed address/data bus isolation.

Use Value: 1.2 V V_F at 100 mA minimizes voltage drop in logic-level translation paths; axial leads simplify manual rework.

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 t_rr, 4.0 pF C_J, 100 V V_BR; commercial grade only	Lacks MIL-PRF-19500 qualification; unsuitable for screened aerospace or defense deployments	Select when board space is constrained and military screening is not required
1N6642US	Same die, same electrical specs, but in surface-mount D-5B package; identical t_rr, V_BR, and C_J	Requires reflow-compatible layout; no axial lead flexibility for prototyping or repair	Select when transitioning from through-hole to automated SMT assembly

Compared with 1N4148WS-7-F and 1N6642US, the 1N6642UB2R/TR uniquely combines JANTXV-level screening, axial through-hole leads for serviceability, and hermetic reliability - making it the only choice for mission-critical, field-replaceable interface protection where long-term parametric stability is mandated.

Availability

1N6642UB2R/TR is available at Aetrix Electronics and suitable for RS-232/RS-422 interface protection, Ethernet 10 Base-T receiver clamping, and switching core drivers requiring stable component supply across extended temperature and lifecycle demands.

Supply support for 1N6642UB2R/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 markets.

The 1N6642UB2R/TR belongs to Microsemi's military-qualified switching diode product line, engineered specifically for ultra-fast signal routing and transient protection in harsh-environment data communication and memory systems.

FAQ

What is the reverse recovery time (t_rr) specification for the 1N6642UB2R/TR?

The 1N6642UB2R/TR has a reverse recovery time of 5.0 ns under standard test conditions (I_F = I_R = 10 mA, I_R(REC) = 1.0 mA, C = 3 pF, R_L = 100 Ω). This value is confirmed in the Microsemi T4-LDS-0218 datasheet and reflects its suitability for high-speed digital interface applications such as RS-422 and Ethernet 10 Base-T where fast edge fidelity is essential. The 1N6642UB2R/TR maintains consistent t_rr across its qualified temperature range.

Is the 1N6642UB2R/TR RoHS compliant?

The 1N6642UB2R/TR is not RoHS compliant, as it uses tin-lead plated terminals (>3% Pb) per the original MIL-PRF-19500/578 specification. RoHS-compliant versions (e3 suffix) are available only in commercial-grade variants (e.g., 1N6642US-e3), not in the UB2R/TR military-qualified configuration. The 1N6642UB2R/TR remains fully compliant with legacy defense and aerospace solderability and reliability standards.

What package type does the 1N6642UB2R/TR use?

The 1N6642UB2R/TR uses the hermetically sealed "D" package - an axial-lead, hard-glass case with voidless construction and flexible thru-hole leads. Dimensions are defined in Microsemi's T4-LDS-0218 package drawing: BD = 0.056–0.080 inch, BL = 0.130–0.180 inch, LD = 0.018–0.022 inch, LL = 1.00–1.50 inch. Cathode polarity is marked by a visible band on the glass body.

Can the 1N6642UB2R/TR replace the 1N4148 in high-reliability designs?

Yes - the 1N6642UB2R/TR is explicitly listed as a replacement for the 1N4148 in the Microsemi datasheet, offering superior performance: lower capacitance (2.8 pF vs. ~4 pF), faster recovery (5.0 ns vs. 4–8 ns), and full MIL-PRF-19500/578 qualification. However, it is not a direct pin-compatible drop-in due to its larger "D" package and axial lead form; layout adaptation is required. The 1N6642UB2R/TR delivers verified reliability where 1N4148 would not meet screening or environmental requirements.

What is the maximum junction temperature rating for the 1N6642UB2R/TR?

The 1N6642UB2R/TR has a specified junction and storage temperature range of −65 °C to +175 °C, as documented in the Microsemi T4-LDS-0218 datasheet. This extended range supports operation in extreme environments including avionics, downhole tools, and high-temperature industrial control systems. Thermal resistance values (R_θJL = 150 °C/W, R_θJA = 250 °C/W) are measured under defined PCB conditions and enable accurate thermal modeling for the 1N6642UB2R/TR in system-level designs.

1N6642UB2R/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:: -

1N6642UB2R/TR FAQ

1.How can I place an order for 1N6642UB2R/TR through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N6642UB2R/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 1N6642UB2R/TR reliable?

The price and inventory of 1N6642UB2R/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6642UB2R/TR is usually 5 days.

3.What payment methods are accepted for 1N6642UB2R/TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6642UB2R/TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N6642UB2R/TR?

1N6642UB2R/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N6642UB2R/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 1N6642UB2R/TR?

For technical support, including 1N6642UB2R/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6642UB2R/TR requirements.

6.How does Aetrix verify that 1N6642UB2R/TR is sourced from the original manufacturer or authorized distributors?

All 1N6642UB2R/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 1N6642UB2R/TR meets industry standards.

7.What is the process for return or replacement of 1N6642UB2R/TR?

All 1N6642UB2R/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N6642UB2R/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 1N6642UB2R/TR part is unused and in its original packaging.

Return procedure for 1N6642UB2R/TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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