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Microchip Technology 1N4618URE3
- Part No.:
- 1N4618URE3
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4618URE3.pdf
- Description:
- DIODE ZENER 2.7V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,211
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Product details
Overview
1N4618URE3 from Microsemi is a 500 mW surface-mount Zener diode in DO-213AA (MELF) package, rated for 2.7 V nominal Zener voltage at 250 mA test current, with ±5% tolerance, 1500 Ω dynamic impedance, and 0.5 µA maximum reverse leakage at 0.5 V. It delivers precision voltage regulation in high-reliability aerospace and defense power supply monitoring circuits.
For engineers reviewing the 1N4618URE3 datasheet, 1N4618URE3 pinout, 1N4618URE3 application, or 1N4618URE3 equivalent, this part supports low-noise (<1 µV/√Hz), radiation-hardened, hermetically sealed regulation where stable reference voltage under wide temperature (-65°C to +175°C) and current variation is required.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown with a well-defined Zener voltage of 2.7 V at IZT = 250 mA. Its metallurgically bonded glass construction ensures hermetic sealing and ESD immunity per MIL-STD-750 Method 1020.
Thermal resistance is specified as 100°C/W junction-to-end-cap and 300°C/W junction-to-ambient on FR4 board; power derating begins linearly at 125°C end-cap temperature, reaching zero dissipation at 175°C. Noise density is ≤1 µV/√Hz - confirmed at 2.7 V - enabling use in low-noise analog references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.7 V at 250 mA test current - defines stable regulation point for low-voltage biasing and reference generation |
| Power Rating | 500 mW - supports continuous operation up to 25°C ambient before linear derating begins at 125°C end-cap |
| Dynamic Impedance (ZZT) | 1500 Ω - indicates moderate regulation stiffness; suitable for non-critical references where load current varies <±10% |
| Reverse Leakage (IR) | 0.5 µA max at 0.5 V - ensures minimal parasitic current draw in standby or high-impedance sensing nodes |
| Noise Density | ≤1 µV/√Hz - enables use in precision analog front-ends requiring ultra-low broadband noise contribution |
| Temp Coefficient (αVZ) | -0.075 %/°C - predictable negative drift allows compensation in temperature-stable reference designs |
| Junction Temp Range | -65°C to +175°C - qualified for extended-range military and space-grade thermal environments |
Pinout & Package
DO-213AA (SOD-80 / CDLL34) MELF glass package: cylindrical, hermetically sealed, cathode band marked on one end. Terminals are metallurgically bonded; polarity is cathode-positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to higher-potential rail; reverse-biased to maintain 2.7 V drop across load |
| Anode (unbanded end) | Reference ground node | Typically tied to system ground or lower-potential bias point; completes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic MELF packaging | DO-213AA glass enclosure prevents moisture ingress and enables long-term stability in harsh environments |
| MIL-PRF-19500/435 qualification | Available in JAN/JANTX/JANTXV/JANS screening levels - verified reliability for flight-critical and defense systems |
| Low noise density | ≤1 µV/√Hz at 2.7 V - minimizes added noise in precision voltage references and sensor excitation circuits |
| ESD robustness | Non-sensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in board-level integration |
| Radiation hardness | Inherently radiation-tolerant per Microsemi MicroNote 050 - suitable for low-dose space applications without shielding |
Applications
| Aerospace Power Monitoring | Defense System Reference Biasing |
|---|---|
Use Scenario: Monitoring regulated 3.3 V rail in satellite power distribution unit under thermal cycling and radiation exposure. IC Role / Device Role / Timing Role: Zener reference diode providing stable 2.7 V feedback node for comparator-based overvoltage detection. Use Value: Hermetic DO-213AA package and -65°C to +175°C operation ensure uninterrupted function across orbital thermal extremes. |
Use Scenario: Generating precision bias voltage for RF front-end amplifiers in tactical radio transceivers. IC Role / Device Role / Timing Role: Low-noise 2.7 V reference source for amplifier DC bias networks requiring minimal signal contamination. Use Value: ≤1 µV/√Hz noise density prevents degradation of receiver sensitivity and adjacent-channel interference. |
| Industrial Control Loop Sensing | Medical Diagnostic Equipment Calibration |
Use Scenario: Providing reference voltage for 12-bit ADC input scaling in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Stable 2.7 V Zener shunt regulator establishing known full-scale threshold for current-loop (4–20 mA) conversion. Use Value: -0.075 %/°C tempco enables predictable drift compensation in firmware, improving measurement accuracy over 0–70°C operating range. |
Use Scenario: Calibrating photodiode amplifier gain stages in portable ultrasound imaging probes. IC Role / Device Role / Timing Role: Precision shunt reference maintaining fixed bias point for transimpedance amplifier feedback network. Use Value: MIL-qualified reliability and RoHS-compliant e3 plating meet medical device traceability and biocompatibility requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CDLL4618-1 | Same 2.7 V Zener, identical DO-213AA package, but commercial-grade (non-mil-screened); RoHS compliant only in e3 variant | Lacks JAN/JANTX/JANTXV/JANS qualification; not approved for flight hardware or defense prime BOMs | Select when cost-sensitive industrial or commercial designs require same electrical specs without mil-spec assurance |
| 1N4618UR-1 | Identical specification and screening level; "URE3" suffix denotes RoHS-compliant matte-tin plating per MIL-STD-750 Method 2026 | No functional difference - URE3 is the RoHS-compliant version of 1N4618UR-1 (which uses SnPb plating) | Choose 1N4618URE3 for new designs requiring RoHS compliance while retaining full mil-qualification and hermetic reliability |
Compared with CDLL4618-1 and 1N4618UR-1, the 1N4618URE3 uniquely combines JANS-level reliability qualification with RoHS-compliant terminations - making it the only option for next-generation defense electronics requiring both environmental compliance and flight-certifiable performance.
Availability
1N4618URE3 is available at Aetrix Electronics and suitable for aerospace power monitoring, defense system reference biasing, and industrial control loop sensing requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4618URE3 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 1N4618URE3 belongs to Microsemi's legacy MIL-PRF-19500/435-qualified Zener diode family, designed specifically for voltage regulation in mission-critical systems where hermeticity, radiation tolerance, and extreme temperature resilience are mandatory.
FAQ
What is the Zener voltage tolerance for 1N4618URE3?
The 1N4618URE3 has a nominal Zener voltage of 2.7 V with a standard tolerance of ±5%, as defined by JEDEC for the 1N4614–1N4627 series. This tolerance applies under thermal equilibrium at 25°C with IZT = 250 mA and is consistent across all screening levels including JANS.
Is 1N4618URE3 RoHS compliant?
Yes, the "e3" suffix in 1N4618URE3 explicitly denotes RoHS-compliant annealed matte-tin plating on commercial-grade devices. This plating meets MIL-STD-750 Method 2026 solderability requirements and is certified for lead-free assembly processes.
What package type does 1N4618URE3 use?
The 1N4618URE3 uses the DO-213AA (also designated SOD-80 or CDLL34) MELF-style glass package - a hermetically sealed, cylindrical surface-mount outline with metallurgically bonded terminals and cathode band marking.
How does the temperature coefficient affect 1N4618URE3 performance?
The 1N4618URE3 has a temperature coefficient of -0.075 %/°C, meaning its Zener voltage decreases predictably with rising temperature. This allows designers to compensate for drift in high-precision references using passive or active correction techniques across -65°C to +175°C.
Can 1N4618URE3 replace 1N4618UR-1 in existing designs?
Yes - the 1N4618URE3 is a direct RoHS-compliant replacement for 1N4618UR-1, sharing identical electrical specifications, DO-213AA packaging, and mil-qualification levels. Only the termination plating differs (matte-tin vs. tin-lead), requiring no PCB layout changes.
1N4618URE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.7 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1500 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N4618URE3 FAQ
1.How can I place an order for 1N4618URE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4618URE3 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 1N4618URE3 reliable?
The price and inventory of 1N4618URE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4618URE3 is usually 5 days.
3.What payment methods are accepted for 1N4618URE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4618URE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4618URE3?
1N4618URE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4618URE3 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 1N4618URE3?
For technical support, including 1N4618URE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4618URE3 requirements.
6.How does Aetrix verify that 1N4618URE3 is sourced from the original manufacturer or authorized distributors?
All 1N4618URE3 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 1N4618URE3 meets industry standards.
7.What is the process for return or replacement of 1N4618URE3?
All 1N4618URE3 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4618URE3, 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 1N4618URE3 part is unused and in its original packaging.
Return procedure for 1N4618URE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4618URE3 Tags
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