My Inquiry
My Account
Microchip Technology 1N4454UR
- Part No.:
- 1N4454UR
- Manufacturer:
- Microchip Technology
- Category:
- Single Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4454UR.pdf
- Description:
- DIODE GP 75V 200MA DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,311
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N4454UR from Microsemi is a hermetically sealed, metallurgically bonded switching diode in DO-213AA glass package, rated for 50V reverse voltage, 200mA operating current, and 4.0A surge current, with 4.0ns reverse recovery time - used in high-reliability military timing, pulse shaping, and sample-and-hold circuits.
For engineers reviewing the 1N4454UR datasheet, 1N4454UR pinout, 1N4454UR application, or 1N4454UR equivalent, key selection criteria include its MIL-PRF-19500/144 qualification, -55°C to +175°C operating range, 2.0pF junction capacitance, and 100°C/W thermal resistance - critical for radiation-tolerant and high-temperature analog signal paths.
Technical Context
This diode employs double-plug construction and copper-clad steel leads with tin/lead finish to ensure mechanical robustness and solderability under MIL-spec reflow profiles. Its metallurgical bond and hermetic glass seal eliminate moisture ingress and enable stable operation across extreme thermal cycling.
The 1N4454UR delivers fast switching performance with TRR ≤ 4.0ns at IF = IR = 10mA and IRec = 1mA, and low forward voltage (VF ≤ 1.0V at 10mA, 25°C), supporting precision clamping and high-speed demodulation in analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VRWM) | 50V - defines maximum DC blocking capability before breakdown in clamp or protection circuits |
| Forward Current (IF) | 200mA at TA = +25°C - continuous conduction limit before thermal derating begins |
| Reverse Recovery Time (TRR) | ≤ 4.0ns - enables use in >100MHz pulse applications without tail current distortion |
| Junction Capacitance (CJ) | ≤ 2.0pF at 0V - minimizes signal loading in RF detector and sampling gate designs |
| Operating Temperature Range | -55°C to +175°C - supports deployment in engine control units and downhole instrumentation |
| Thermal Resistance (RθJEC) | ≤ 100°C/W - determines junction-to-case temperature rise under 500mW dissipation |
| Surge Current (1µs sine) | 4.0A - withstands transient overloads in radar pulse modulators and ignition drivers |
Pinout & Package
Hermetically sealed DO-213AA glass package with axial leads; cathode identified by band at one end. Case meets MIL-PRF-19500/144 outline requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node in series-switching or clamp configurations |
| Cathode | Forward current exit / reverse-blocking terminal | Banded end; ties to higher-potential rail in reverse-biased protection or biasing networks |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass seal | Prevents parametric drift and failure due to humidity or contaminants in aerospace avionics |
| Metallurgical bonding | Ensures low-contact-resistance interface and long-term bond integrity under thermal shock |
| Double-plug construction | Improves lead-to-glass seal strength and mechanical reliability during board flexure or vibration |
| MIL-PRF-19500/144 compliance | Validates screening, testing, and traceability for Class B and Class S military applications |
| Copper-clad steel leads | Provides tensile strength for manual handling and solder joint reliability in high-G environments |
Applications
| Radar Pulse Modulator | Aerospace Signal Clamping |
|---|---|
Use Scenario: High-voltage, short-duration pulse generation in airborne fire-control radar transmitters. IC Role / Device Role / Timing Role: Fast-switching diode in series-connected pulse sharpening network. Use Value: 4.0ns TRR and 4.0A surge rating maintain pulse fidelity and survive repetitive HV transients. | Use Scenario: Input protection and level translation in flight-critical sensor signal conditioning modules. IC Role / Device Role / Timing Role: Reverse-biased clamping diode limiting input swing to ±5V rails. Use Value: 2.0pF capacitance avoids phase shift in 10–50MHz analog sensor outputs. |
| Downhole Telemetry Receiver | Engine Control Unit (ECU) Bias Network |
Use Scenario: Demodulation and signal recovery in oil-well logging tools operating at 175°C ambient. IC Role / Device Role / Timing Role: Detector diode in AM envelope recovery stage. Use Value: Stable VF and IR over -55°C to +175°C enable repeatable detection threshold across depth gradients. | Use Scenario: Bias current steering and reference voltage setting in high-temperature microcontroller power management. IC Role / Device Role / Timing Role: Precision current source element in bandgap reference circuitry. Use Value: Metallurgically bonded junction ensures long-term stability of forward voltage under thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4454UR-1 (JANTXV) | Same die and package; subjected to extended screening per MIL-PRF-19500/144 Class V | Required for space-grade and Class S programs with zero defect tolerance | Select when full MIL-STD-883 testing and lot traceability are mandated |
| LL4454 | Plastic-molded SOD-323 package; no hermetic seal; TRR ≤ 5.0ns; VRWM = 50V | Suitable for commercial industrial controls but not qualified for military temperature or reliability screening | Choose for cost-sensitive, non-military applications where 175°C operation is not required |
Compared with 1N4454UR, the JANTXV variant adds rigorous burn-in and parameter verification for mission-critical systems, while LL4454 trades hermeticity and temperature range for surface-mount compatibility and lower unit cost - neither is pin-compatible due to differing axial vs. SMD form factors.
Availability
1N4454UR is available at Aetrix Electronics and suitable for radar pulse modulators, aerospace signal clamping, and downhole telemetry receivers requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4454UR 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 components for defense, aerospace, and industrial markets.
The 1N4454UR belongs to Microsemi's legacy MIL-qualified discrete diode family, engineered specifically for high-temperature, high-reliability switching in military and spaceborne systems.
FAQ
What is the maximum reverse voltage rating for the 1N4454UR?
The 1N4454UR has a DC reverse voltage (VRWM) rating of 50V. This value is specified at 25°C ambient and represents the maximum continuous voltage the device can block in reverse bias without entering breakdown. Exceeding this rating risks irreversible junction damage, especially under transient conditions where the 4.0A surge current limit also applies. The 1N4454UR maintains this rating across its full -55°C to +175°C operating range.
Is the 1N4454UR suitable for high-temperature automotive under-hood applications?
Yes, the 1N4454UR is rated for operation from -55°C to +175°C, making it suitable for under-hood automotive applications such as engine control unit bias networks and transmission sensor interfaces. Its hermetic glass package and metallurgical bond ensure parameter stability and long-term reliability where plastic-packaged alternatives would degrade. The 1N4454UR's 100°C/W thermal resistance must be accounted for in PCB layout to avoid exceeding junction temperature limits at full 200mA load.
Does the 1N4454UR have a defined pinout configuration, and how is polarity marked?
Yes, the 1N4454UR uses an axial-leaded DO-213AA package with two terminals: anode and cathode. Polarity is marked by a visible band on the glass body at the cathode end. This band must align with the circuit's designated cathode node during placement. The 1N4454UR's pinout is fixed and non-reversible - incorrect orientation results in unintended forward conduction or open-circuit behavior depending on circuit topology.
How does the 1N4454UR compare to standard 1N4148 diodes in switching performance?
The 1N4454UR offers faster reverse recovery (TRR ≤ 4.0ns vs. 4–8ns for 1N4148) and higher temperature capability (-55°C to +175°C vs. -65°C to +175°C), but with higher forward voltage (≤1.0V at 10mA vs. ≤0.72V for 1N4148). Unlike the commercial 1N4148, the 1N4454UR is MIL-qualified, hermetically sealed, and screened to JANTXV levels - making it appropriate for mission-critical systems where reliability outweighs minor VF trade-offs.
Can the 1N4454UR be used in RF detector applications above 100 MHz?
Yes, the 1N4454UR is suitable for RF detection up to approximately 200 MHz due to its ≤2.0pF junction capacitance and ≤4.0ns reverse recovery time. These parameters minimize capacitive loading and recovery lag, preserving signal envelope integrity in AM demodulation stages. However, optimal performance requires impedance-matched layout and minimal parasitic inductance in the anode/cathode traces. The 1N4454UR's stable parameters across temperature further support consistent detection threshold in wide-range RF receivers.
1N4454UR 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):
- 75 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 FAQ
1.How can I place an order for 1N4454UR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4454UR 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 reliable?
The price and inventory of 1N4454UR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4454UR is usually 5 days.
3.What payment methods are accepted for 1N4454UR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4454UR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4454UR?
1N4454UR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4454UR 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?
For technical support, including 1N4454UR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4454UR requirements.
6.How does Aetrix verify that 1N4454UR is sourced from the original manufacturer or authorized distributors?
All 1N4454UR 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 meets industry standards.
7.What is the process for return or replacement of 1N4454UR?
All 1N4454UR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4454UR, 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 part is unused and in its original packaging.
Return procedure for 1N4454UR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4454UR Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
