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Microchip Technology 1N4623UR/TR
- Part No.:
- 1N4623UR/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4623UR/TR.pdf
- Description:
- DIODE ZENER 4.3V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,527
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Product details
Overview
1N4623UR/TR from Microsemi is a glass-encapsulated, surface-mount Zener diode in DO-213AA (SOD-80/MELF) package, rated for 0.5 W steady-state power dissipation, with nominal Zener voltage 4.3 V ±5%, 250 mA test current, 1600 Ω dynamic impedance, and 2.0 μA maximum reverse leakage at 2.0 V. It serves as a precision voltage reference or shunt regulator in low-power analog signal conditioning circuits.
For engineers reviewing the 1N4623UR/TR datasheet, 1N4623UR/TR pinout, 1N4623UR/TR application, or 1N4623UR/TR equivalent, key selection criteria include Zener voltage tolerance, temperature coefficient (−0.050 %/°C), noise density (1 μV/√Hz), hermetic glass packaging, and RoHS-compliant e3 marking with TR tape-and-reel delivery.
Technical Context
This device operates as a silicon planar Zener diode utilizing avalanche breakdown for voltages ≥4.3 V. Its −0.050 %/°C temperature coefficient indicates stable regulation across −65 °C to +175 °C operating range, with thermal resistance of 150 °C/W junction-to-end-cap when mounted per recommended footprint.
Designed for shunt regulation, it maintains regulation over broad current range (IZT = 250 mA, IZM = 77 mA), exhibits minimal capacitance (~1.5 pF at 0 V), and delivers low noise performance critical for precision reference applications-verified by measurement in 1–3 kHz band at 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 4.3 V ±5% at 250 mA - defines regulated output voltage under nominal bias |
| Zener Impedance ZZT | 1600 Ω at 250 mA - determines regulation stiffness and load transient response |
| Reverse Leakage IR | 2.0 μA max at 2.0 V - ensures low standby current in high-impedance bias networks |
| Noise Density ND | 1 μV/√Hz typical - enables use in low-noise voltage references and sensor excitation |
| Power Dissipation | 0.5 W at TEC < 100 °C - sets thermal design margin on FR4 PCB with 1 oz Cu |
| Temp Coefficient αVZ | −0.050 %/°C - supports stable regulation over industrial temperature range |
| Forward Voltage VF | 1.1 V at 200 mA - defines conduction drop during forward-bias fault conditions |
Pinout & Package
DO-213AA (SOD-80/MELF) hermetically sealed glass package with axial symmetry and cathode band marking. Cathode terminal is identified by single black band; device operates with banded end positive relative to opposite end during Zener regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener anode connection point | Connected to higher potential node; regulates voltage by sinking current into this terminal |
| Anode (unbanded end) | Zener cathode connection point | Connected to lower potential (e.g., ground or reference rail); completes shunt path |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF package | Enables operation from −65 °C to +175 °C with no moisture-induced parameter drift |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling |
| RoHS-compliant finish | Tin-Lead (Sn/Pb) or annealed matte-Tin plating - supports lead-free assembly without solderability compromise |
| Low capacitance | ~1.5 pF at 0 V - preserves high-frequency signal integrity in RF bias and timing circuits |
| Radiation-hardened construction | Inherently radiation-tolerant per Microsemi MicroNote 050 - suitable for space-qualified and high-reliability systems |
Applications
| Reference Voltage Generation | Overvoltage Protection Clamping |
|---|---|
Use Scenario: Providing stable 4.3 V reference for ADC biasing and op-amp level-shifting in battery-powered instrumentation. IC Role / Device Role / Timing Role: Shunt voltage reference regulating node voltage against supply variation and load transients. Use Value: Delivers <±0.215 V tolerance and −0.050 %/°C drift, enabling 12-bit accuracy over −40 °C to +85 °C ambient. | Use Scenario: Clamping microcontroller I/O pins against ESD or surge events exceeding 5 V rail. IC Role / Device Role / Timing Role: Low-capacitance (1.5 pF) shunt clamp limiting voltage to 4.3 V before damage threshold. Use Value: Responds within nanoseconds with 2.0 μA leakage at 2.0 V, minimizing standby power impact on sensitive inputs. |
| Current-Sense Bias Network | Temperature-Stable Oscillator Bias |
Use Scenario: Setting precise bias current for Hall-effect sensors and current-sense amplifiers in motor control modules. IC Role / Device Role / Timing Role: Zener-regulated current source using series resistor and 4.3 V reference node. Use Value: Maintains ±0.5% current stability over −40 °C to +125 °C due to matched −0.050 %/°C TC and low ZZT. | Use Scenario: Supplying temperature-stable bias to crystal oscillator amplifier stages in telecom timing modules. IC Role / Device Role / Timing Role: Low-noise (1 μV/√Hz), low-drift voltage reference stabilizing gain and startup behavior. Use Value: Reduces oscillator frequency drift by >3× versus standard 5% Zeners, verified in 1–3 kHz noise band. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4623UR | No TR suffix - bulk or ammo pack only; identical electrical specs and DO-213AA package | Not optimized for automated SMT placement; requires manual or vibratory feeding | Select 1N4623UR/TR when requiring tape-and-reel delivery for pick-and-place assembly |
| BZX55-C4V3 | Plastic DO-35 package; ±5% tolerance; 500 mW rating; 1000 Ω ZZT; +0.02 %/°C TC | Higher capacitance (~5 pF); not radiation-hardened; limited to +150 °C max operating temp | Choose BZX55-C4V3 only for cost-sensitive commercial designs where hermeticity and extended temperature range are noncritical |
Compared with 1N4623UR/TR, the base part 1N4623UR lacks tape-and-reel packaging but matches all electrical and thermal specs, while BZX55-C4V3 trades hermetic reliability and low noise for lower cost and wider commercial availability in plastic packaging.
Availability
1N4623UR/TR is available at Aetrix Electronics and suitable for precision voltage reference generation, overvoltage clamping, and temperature-stable bias network design requiring stable component supply across aerospace, industrial control, and medical electronics programs.
Supply support for 1N4623UR/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) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and ultra-low-noise analog components for defense, aerospace, and industrial markets.
The 1N4623UR/TR belongs to Microsemi's legacy DO-213AA glass Zener family, engineered for applications demanding hermetic sealing, wide temperature operation, and low-noise voltage regulation in mission-critical systems.
FAQ
What is the Zener voltage tolerance of the 1N4623UR/TR?
The 1N4623UR/TR has a nominal Zener voltage of 4.3 V with a standard tolerance of ±5%, as specified in the Microsemi datasheet. No suffix denotes this standard tolerance; tighter tolerances (±2% or ±1%) require C or D suffixes respectively, which are not present in the 1N4623UR/TR part number.
Does the 1N4623UR/TR have a defined temperature coefficient?
Yes, the 1N4623UR/TR has a temperature coefficient of −0.050 %/°C, indicating its Zener voltage decreases slightly with increasing temperature. This value is confirmed in the "Typical Temp. Coeff. of Zener Voltage" column of the official Microsemi electrical characteristics table for the 1N4623UR/TR.
What package type is used for the 1N4623UR/TR?
The 1N4623UR/TR uses the DO-213AA (also known as SOD-80 or MELF) hermetically sealed glass package. Dimensions are 1.60–1.70 mm diameter and 3.30–3.70 mm length, with cathode indicated by a single black band.
Is the 1N4623UR/TR RoHS compliant?
Yes, the "e3" suffix in 1N4623UR/TR confirms RoHS compliance per Microsemi documentation. The device features either Sn/Pb or annealed matte-Tin plating, both qualified per MIL-STD-750 Method 2026 for solderability.
What is the maximum power dissipation for the 1N4623UR/TR?
The 1N4623UR/TR is rated for 0.5 W steady-state power dissipation at end-cap temperature <100 °C or ambient temperature <25 °C on FR4 board with 1 oz copper. Derating follows the curve in Figure 2 of the Microsemi datasheet, reaching zero power at 175 °C ambient.
1N4623UR/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.3 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1600 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 2 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
1N4623UR/TR FAQ
1.How can I place an order for 1N4623UR/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4623UR/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 1N4623UR/TR reliable?
The price and inventory of 1N4623UR/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4623UR/TR is usually 5 days.
3.What payment methods are accepted for 1N4623UR/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4623UR/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4623UR/TR?
1N4623UR/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4623UR/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 1N4623UR/TR?
For technical support, including 1N4623UR/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4623UR/TR requirements.
6.How does Aetrix verify that 1N4623UR/TR is sourced from the original manufacturer or authorized distributors?
All 1N4623UR/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 1N4623UR/TR meets industry standards.
7.What is the process for return or replacement of 1N4623UR/TR?
All 1N4623UR/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4623UR/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 1N4623UR/TR part is unused and in its original packaging.
Return procedure for 1N4623UR/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4623UR/TR Tags
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