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Microchip Technology 1N4454UR-1/TR
- Part No.:
- 1N4454UR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4454UR-1/TR.pdf
- Description:
- DIODE GEN PURP 50V 200MA DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,083
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Product details
Overview
1N4454UR-1/TR from Microsemi is a hermetically sealed, metallurgically bonded switching diode in DO-213AA glass package, rated for 50 V DC reverse voltage, 200 mA operating current, and 4.0 A surge current, used in high-reliability timing, clamping, and waveform shaping circuits across aerospace and defense systems.
For engineers reviewing the 1N4454UR-1/TR datasheet, 1N4454UR-1/TR pinout, 1N4454UR-1/TR application, or 1N4454UR-1/TR equivalent, key selection factors include its 4.0 ns reverse recovery time, 2.0 pF junction capacitance at 0 V, 100°C/W thermal resistance, MIL-PRF-19500/144 qualification, and operation up to +175°C ambient.
Technical Context
This diode employs double-plug construction and copper-clad steel leads with tin/lead finish to ensure stable electrical performance under thermal cycling and mechanical stress. Its metallurgical bonding and hermetic glass seal enable reliable operation from –55°C to +175°C without parameter drift or leakage increase.
The device delivers fast switching behavior with TRR ≤ 4.0 ns (IF = IR = 10 mA, IRec = 1 mA) and low forward voltage drop (VF ≤ 1.0 V at IF = 10 mA, 25°C), supporting high-frequency signal routing and pulse conditioning in analog front-ends and protection stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| DC Reverse Voltage (VRWM) | 50 V - Maximum continuous reverse bias before breakdown; defines clamping headroom in protection circuits. |
| Reverse Recovery Time (TRR) | ≤ 4.0 ns - Enables use in >100 MHz switching applications such as RF detector sampling and pulse shaping. |
| Junction Capacitance (CJ) | ≤ 2.0 pF @ 0 V - Minimizes signal loading in high-frequency AC coupling and tuning networks. |
| Forward Voltage (VF) | ≤ 1.0 V @ 10 mA, 25°C - Ensures low conduction loss in low-current logic-level switching paths. |
| Surge Current (ISURGE) | 4.0 A, 1 µs sine - Supports transient overvoltage handling in ESD-tolerant interface stages. |
| Thermal Resistance (RθJEC) | ≤ 100°C/W - Limits junction temperature rise under 200 mA DC operation in confined PCB layouts. |
Pinout & Package
Hermetically sealed DO-213AA glass package (MIL-PRF-19500/144 compliant); cathode identified by band at one end; axial lead configuration with copper-clad steel leads and tin/lead plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential node in clamp, rectify, or logic-level translation paths. |
| Cathode | Current exit point during forward conduction; banded end | Connected to higher-potential node; polarity marking critical for correct orientation in series protection stacks. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/144 qualification | Qualified to JAN, JANTX, and JANTXV levels - meets screening, testing, and traceability requirements for military/aerospace deployment. |
| Metallurgical bonding | Eliminates wire bonds and interfacial delamination risk - ensures long-term reliability under thermal shock and vibration. |
| Double-plug construction | Provides mechanical stability and consistent thermal path - reduces parameter shift during repeated power cycling. |
| Hermetic glass seal | Prevents moisture ingress and oxidation - maintains leakage current < 0.1 µA at 50 V after 1000 hrs at 125°C. |
Applications
| Radar Pulse Conditioning | Avionics Signal Clamping |
|---|---|
Use Scenario: Fast edge detection and pulse sharpening in X-band radar receiver front-ends. IC Role / Device Role / Timing Role: Switching diode used in diode-resistor differentiator networks to compress pulse width and suppress ringing. Use Value: 4.0 ns TRR enables accurate timing resolution down to 250 ps edges; 2.0 pF capacitance avoids signal distortion in 50 Ω transmission lines. | Use Scenario: Overvoltage clamping on ARINC 429 data line inputs in flight control computers. IC Role / Device Role / Timing Role: Bidirectional transient suppressor placed between differential pair and receiver IC input pins. Use Value: 50 V VRWM aligns with ARINC 429 peak voltage spec; hermetic seal prevents failure in humid cabin environments. |
| Spacecraft Power Sequencing | Missile Guidance Reference Timing |
Use Scenario: Isolation diode in redundant 28 V DC power distribution modules aboard LEO satellites. IC Role / Device Role / Timing Role: OR-ing diode preventing backfeed between parallel power rails during hot-swap events. Use Value: 175°C max operating temperature supports uncooled operation near solar array regulators; 100°C/W RθJEC allows thermal design margin at 150 mA load. | Use Scenario: Trigger conditioning in crystal oscillator start-up circuits for inertial measurement units. IC Role / Device Role / Timing Role: Fast-switching element in Schmitt-trigger reset path to synchronize oscillator enable timing. Use Value: Sub-5 ns TRR ensures deterministic turn-off delay; metallurgical bond eliminates timing jitter from bond-wire resonance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LL4454 | Same die, plastic DO-213AB package; RθJEC = 120°C/W; no MIL-PRF-19500 qualification | Limited to commercial/industrial environments; not suitable for radiation-hardened or extended-temperature deployments | Select LL4454 only when cost sensitivity outweighs hermeticity and military screening requirements. |
| CDLL4454 | Same die, surface-mount SOD-80 package; 1.5 mm × 3.5 mm footprint; VF = 1.1 V max at 10 mA | Enables automated assembly but sacrifices thermal performance and high-temp reliability | Choose CDLL4454 for space-constrained PCBs where reflow compatibility and layout density are prioritized over 175°C operation. |
Compared with LL4454 and CDLL4454, the 1N4454UR-1/TR provides superior thermal management, guaranteed hermetic integrity, and full MIL-PRF-19500/144 compliance - making it the sole option for mission-critical high-temperature and radiation-exposed applications.
Availability
1N4454UR-1/TR is available at Aetrix Electronics and suitable for radar pulse conditioning, avionics signal clamping, and spacecraft power sequencing requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N4454UR-1/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 (now part of Microchip Technology) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets, emphasizing radiation tolerance, extended temperature operation, and long-term supply assurance.
The 1N4454UR-1/TR belongs to Microsemi's legacy MIL-PRF-19500/144 qualified discrete diode family, engineered specifically for high-reliability switching, clamping, and timing functions in harsh-environment electronic systems.
FAQ
What is the maximum operating temperature for the 1N4454UR-1/TR?
The 1N4454UR-1/TR is rated for continuous operation from –55°C to +175°C ambient temperature. This specification is validated per MIL-PRF-19500/144 test conditions and reflects the device's hermetic glass package and metallurgical bonding, which prevent parameter degradation at extreme temperatures. The 1N4454UR-1/TR maintains specified leakage current and switching speed within this full range.
Is the 1N4454UR-1/TR pin-compatible with the LL4454?
No - the 1N4454UR-1/TR uses a DO-213AA axial glass package, while the LL4454 uses a DO-213AB plastic package with different lead spacing and thermal characteristics. Though electrically identical at the die level, their mechanical form factors and mounting methods differ. The 1N4454UR-1/TR requires through-hole assembly and cannot be substituted for the LL4454 without PCB redesign.
What does "UR-1" signify in the 1N4454UR-1/TR part number?
The "UR-1" suffix denotes Microsemi's internal revision and screening level designation for this MIL-PRF-19500/144 qualified part. It identifies compliance with JANTXV-level screening, including burn-in, temperature cycling, and lot acceptance testing. The "TR" indicates tape-and-reel packaging format for automated placement. The 1N4454UR-1/TR is not interchangeable with non-UR variants unless explicitly approved under the same qualification level.
Can the 1N4454UR-1/TR be used in RF detector applications?
Yes - the 1N4454UR-1/TR is well-suited for RF detector applications due to its low 2.0 pF junction capacitance at 0 V and fast 4.0 ns reverse recovery time. These parameters minimize signal attenuation and phase distortion at frequencies up to 1 GHz. The 1N4454UR-1/TR has been deployed in X-band radar envelope detectors where precise amplitude tracking and minimal harmonic generation are required.
Does the 1N4454UR-1/TR require derating above +25°C ambient?
Yes - the 1N4454UR-1/TR must be derated linearly above +25°C ambient at 1.33 mA/°C for operating current, per its datasheet. At +125°C, the maximum allowable DC operating current drops to approximately 133 mA. This derating ensures junction temperature remains within safe limits given its 100°C/W thermal resistance and 500 mW total power dissipation rating. The 1N4454UR-1/TR datasheet provides full derating curves for all ratings.
1N4454UR-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 10 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 4 ns
- Current - Reverse Leakage @ Vr:
- 100 nA @ 50 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
- Operating Temperature - Junction:
- -55°C ~ 175°C
1N4454UR-1/TR FAQ
1.How can I place an order for 1N4454UR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4454UR-1/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 1N4454UR-1/TR reliable?
The price and inventory of 1N4454UR-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4454UR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4454UR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4454UR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4454UR-1/TR?
1N4454UR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4454UR-1/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 1N4454UR-1/TR?
For technical support, including 1N4454UR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4454UR-1/TR requirements.
6.How does Aetrix verify that 1N4454UR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4454UR-1/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 1N4454UR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4454UR-1/TR?
All 1N4454UR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4454UR-1/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 1N4454UR-1/TR part is unused and in its original packaging.
Return procedure for 1N4454UR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4454UR-1/TR Tags
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