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Microchip Technology 1N459AUR
- Part No.:
- 1N459AUR
- Manufacturer:
- Microchip Technology
- Category:
- Single Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N459AUR.pdf
- Description:
- DIODE GP 200V 150MA DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,293
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Product details
Overview
1N459AUR from Microsemi is a hermetically sealed, metallurgically bonded fast-switching signal diode in DO-35 glass package, rated for 200 V peak reverse voltage (VRM), 175 V working peak reverse voltage (VRWM), and 120 mA forward current (IF), used in high-frequency RS-232/RS-422 interface networks and Ethernet 10 Base-T links.
For engineers reviewing the 1N459AUR datasheet, 1N459AUR pinout, 1N459AUR application, or 1N459AUR equivalent, key selection criteria include VRWM stability across -65°C to +150°C junction temperature, low 1.0 V forward voltage at 100 mA, sub-5 nA reverse leakage at VRWM, and JAN-level reliability qualification per MIL-PRF-19500/193.
Technical Context
The 1N459AUR operates as a unidirectional silicon switching diode with double-plug DO-35 construction, enabling fast recovery via low junction capacitance and metallurgical bonding. Its hermetic glass seal ensures long-term parameter stability under thermal cycling and humidity stress.
Designed for signal-level rectification and clamping in high-speed digital interfaces, it supports pulsed forward currents up to 120 mA with VF ≤ 1.0 V at 100 mA (8.5 ms pulse, 2% duty cycle) and maintains IR ≤ 5 µA at VRWM = 175 V and TA = +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRM | 200 V - maximum non-repetitive peak reverse voltage before breakdown; defines absolute overvoltage limit in transient suppression. |
| VRWM | 175 V - maximum continuous peak reverse voltage during normal operation; sets usable clamping threshold in data line protection. |
| IF | 120 mA - maximum repetitive forward current; determines drive capability in logic-level signal routing paths. |
| VF @ 100 mA | ≤1.0 V - forward voltage drop under pulsed test condition; ensures minimal voltage loss in low-power interface circuits. |
| IR @ VRWM | ≤25 nA @ +25°C - reverse leakage at working voltage; critical for maintaining signal integrity in high-impedance receivers. |
| TJ Range | -65°C to +150°C - operational junction temperature span; enables deployment in aerospace, industrial, and military environments. |
Pinout & Package
Package: DO-35 glass axial-leaded hermetically sealed package with blue body coating, black digit marking, and cathode band identification. Terminals are tin/lead or RoHS-compliant matte tin plated copper-clad steel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of signal path; must be biased positive relative to cathode for conduction. |
| Cathode | Forward current exit point / reverse voltage reference | Banded end; connects to higher-potential node in clamping or protection configurations; defines polarity-sensitive mounting orientation. |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bonding | Enables consistent junction formation and repeatable switching characteristics across production lots and temperature extremes. |
| Hermetic glass sealing | Prevents moisture ingress and parameter drift over time, supporting >20-year field life in sealed enclosures. |
| JAN qualification per MIL-PRF-19500/193 | Validates reliability for defense/aerospace use with screening including temperature cycling, burn-in, and lot acceptance testing. |
| Low 1.0 V VF at 100 mA | Reduces power dissipation in high-duty-cycle signal routing, minimizing self-heating in dense PCB layouts. |
Applications
| RS-232 Interface Protection | Ethernet 10 Base-T Line Clamping |
|---|---|
Use Scenario: Placed across differential TX/RX lines to clamp ESD transients and prevent receiver damage in serial communication ports. IC Role / Device Role / Timing Role: Signal-level bidirectional clamping diode protecting transceiver IC inputs from ±15 kV HBM events. Use Value: Maintains <25 nA leakage at 175 V VRWM to avoid loading high-impedance RS-232 receivers while surviving repeated 100 ns/1 kV surges. | Use Scenario: Integrated into PHY-side surge protection circuits on 10 Base-T Ethernet magnetics modules. IC Role / Device Role / Timing Role: Fast-recovery clamping element limiting common-mode voltage excursions during lightning-induced surges. Use Value: Achieves <5 µA IR at +150°C, ensuring stable clamping performance under elevated ambient temperatures in network equipment chassis. |
| Local Area Network Transceivers | Switching Core Drivers |
Use Scenario: Used in legacy LAN transceiver front-ends to isolate bias rails and suppress crosstalk between adjacent channels. IC Role / Device Role / Timing Role: Low-capacitance (<2 pF typical) signal routing diode enabling multi-channel isolation without bandwidth degradation. Use Value: Delivers 120 mA IF rating to sustain gate drive pulses in multi-port hub controllers without thermal derating below +85°C. | Use Scenario: Embedded in discrete MOSFET gate driver feedback paths to shape rise/fall times and suppress shoot-through. IC Role / Device Role / Timing Role: Fast-switching freewheeling diode providing controlled turn-off energy recirculation in PWM control loops. Use Value: Supports 175 V VRWM to tolerate inductive kickback from 12 V–24 V motor drivers without avalanche conduction or parameter shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N459A | No UR suffix; commercial-grade marking only; same electrical specs and DO-35 package. | Lacks RoHS-compliant terminal plating option; not qualified to JAN level. | Select 1N459AUR when RoHS compliance and JAN reliability screening are required for mission-critical deployments. |
| 1N459 | No 'A' grade suffix; looser VF spec (1.2 V max vs. 1.0 V max); no MIL-PRF qualification. | Not rated for high-reliability environments; limited to commercial temperature range (-65°C to +125°C). | Choose 1N459AUR over 1N459 where guaranteed ≤1.0 V VF and full -65°C to +150°C operation are mandatory. |
Compared with 1N459A and 1N459, the 1N459AUR provides tighter forward voltage control, extended high-temperature operation, and verified JAN-level screening-making it the only choice for designs requiring traceable military-grade reliability and RoHS-compliant terminals in the same DO-35 footprint.
Availability
1N459AUR is available at Aetrix Electronics and suitable for RS-232 interface protection, Ethernet 10 Base-T line clamping, and switching core driver circuits requiring stable component supply across extended temperature and reliability requirements.
Supply support for 1N459AUR 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) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N459AUR belongs to Microsemi's legacy JEDEC-registered switching diode family, engineered for signal integrity preservation in high-speed data interfaces where parameter stability under thermal and mechanical stress is non-negotiable.
FAQ
What is the maximum working peak reverse voltage (VRWM) specification for the 1N459AUR?
The 1N459AUR has a VRWM rating of 175 V, defined as the maximum continuous peak reverse voltage it can withstand across its operating temperature range (-65°C to +150°C) excluding transient events. This value is confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0023 Rev. 1 and directly governs its suitability for clamping in 10 Base-T Ethernet and RS-422 interfaces where steady-state common-mode voltages approach 150 V.
Does the 1N459AUR meet MIL-PRF-19500/193 qualification requirements?
Yes, the 1N459AUR is JAN-qualified per MIL-PRF-19500/193, as stated in the DESCRIPTION section on page 1 of T4-LDS-0023 Rev. 1. This qualification includes rigorous environmental and reliability testing such as temperature cycling, steady-state life, and lot acceptance tests-making the 1N459AUR suitable for defense and aerospace applications where failure modes must be statistically bounded.
What is the forward voltage (VF) of the 1N459AUR at 100 mA, and under what test conditions is it specified?
The 1N459AUR exhibits a maximum forward voltage of 1.0 V at 100 mA, measured under pulsed conditions: tp = 8.5 ms, maximum duty cycle 2%. This test method minimizes self-heating and reflects real-world behavior in digital signal routing. The value is documented in the Electrical Characteristics table on page 3 of T4-LDS-0023 Rev. 1 and distinguishes the 'A' grade from standard 1N459 variants.
Is the 1N459AUR RoHS compliant, and how is compliance implemented in the package?
Yes, the 1N459AUR is RoHS compliant, with matte tin plating on copper-clad steel terminals as specified in the MECHANICAL and PACKAGING section on page 2 of T4-LDS-0023 Rev. 1. This applies exclusively to commercial-grade versions; JAN versions retain traditional tin/lead plating. The 'UR' suffix explicitly denotes RoHS-compliant commercial packaging, distinguishing it from non-RoHS 1N459A units.
What is the junction temperature range for the 1N459AUR, and how does it impact system-level thermal design?
The 1N459AUR supports a junction temperature range of -65°C to +150°C, as listed in the MAXIMUM RATINGS table on page 1 of T4-LDS-0023 Rev. 1. This wide span allows direct integration into unheated outdoor telecom enclosures or engine-bay automotive modules without external heatsinking, provided PCB copper area and airflow meet minimum thermal resistance targets derived from its 500 mW power dissipation rating.
1N459AUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 150mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 100 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 µA @ 200 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
- Operating Temperature - Junction:
- -65°C ~ 150°C
1N459AUR FAQ
1.How can I place an order for 1N459AUR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N459AUR 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 1N459AUR reliable?
The price and inventory of 1N459AUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N459AUR is usually 5 days.
3.What payment methods are accepted for 1N459AUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N459AUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N459AUR?
1N459AUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N459AUR 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 1N459AUR?
For technical support, including 1N459AUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N459AUR requirements.
6.How does Aetrix verify that 1N459AUR is sourced from the original manufacturer or authorized distributors?
All 1N459AUR 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 1N459AUR meets industry standards.
7.What is the process for return or replacement of 1N459AUR?
All 1N459AUR units undergo pre-shipment inspection (PSI). If there is an issue with 1N459AUR, 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 1N459AUR part is unused and in its original packaging.
Return procedure for 1N459AUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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