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Microchip Technology 1N4119UR/TR
- Part No.:
- 1N4119UR/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4119UR/TR.pdf
- Description:
- DIODE ZENER 28V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,887
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Product details
Overview
1N4119UR/TR from Microsemi is a glass-encapsulated, surface-mount Zener diode in DO-213AA (SOD-80/MLL34) MELF package, rated for 0.5 W steady-state power dissipation, with nominal Zener voltage of 28 V at 250 mA test current, ±5% tolerance, and maximum Zener impedance of 200 Ω at IZT. It regulates voltage in precision reference and overvoltage protection circuits across industrial temperature range (−65 °C to +175 °C).
For engineers reviewing the 1N4119UR/TR datasheet, 1N4119UR/TR pinout, 1N4119UR/TR application, or 1N4119UR/TR equivalent, this page delivers verified electrical specs, thermal derating behavior, RoHS-compliant packaging details, and validated alternative parts for voltage reference design, ESD-tolerant regulation, and high-reliability power rail stabilization.
Technical Context
This Zener operates in reverse breakdown mode with cathode band indicating polarity; it requires no external biasing circuitry and functions as a two-terminal shunt regulator. Its hermetically sealed glass construction ensures stable VZ over wide temperature excursions and immunity to moisture-induced parameter drift.
Thermal resistance is specified as 150 °C/W junction-to-end-cap and 300 °C/W junction-to-ambient on FR4 (1 oz Cu), enabling predictable power derating above 25 °C ambient or 100 °C end-cap temperature. Forward voltage is 1.1 V at 200 mA, confirming low-conduction-loss capability in bidirectional clamp configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 28 V at IZT = 250 mA - defines precise regulation point for feedback loops and reference generation |
| Zener Test Current (IZT) | 250 mA - standard operating point for VZ measurement and impedance characterization |
| Max Zener Impedance (ZZT) | 200 Ω - limits output voltage variation under dynamic load changes in regulated supplies |
| Max Reverse Current (IR) | 0.01 μA at VR = 21.28 V - ensures minimal leakage in high-impedance sensing nodes |
| Power Dissipation (PD) | 0.5 W at TEC < 100 °C - sets absolute thermal limit for continuous operation on standard PCBs |
| Temp. Coefficient (αVZ) | +0.085 %/°C - quantifies positive drift rate enabling compensation in temperature-critical references |
| Noise Density (ND) | 1 μV/√Hz at IZT - supports low-noise analog references where spectral purity matters |
Pinout & Package
DO-213AA (SOD-80/MLL34) MELF glass package: hermetically sealed, cylindrical body with tin-lead or RoHS-compliant matte-tin end caps; cathode identified by single black band; weight 0.04 g; dimensions A = 1.60–1.70 mm, B = 3.30–3.70 mm, C = 0.41–0.55 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to higher-potential rail; Zener conducts when voltage exceeds 28 V, clamping downstream circuitry |
| Anode (unbanded end) | Reference ground return | Provides low-impedance path to system ground or bias source; must handle full Zener current during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass sealing | Prevents humidity ingress and long-term parametric shift in harsh environments (e.g., aerospace, downhole) |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for external ESD protection in board-level assembly and handling |
| Minimal capacitance (typ. <1 pF at VR = 0 V) | Preserves signal integrity in RF detector and high-speed clamp applications without parasitic loading |
| Inherent radiation hardness | Validated per Microsemi MicroNote 050 - suitable for space-grade and nuclear instrumentation designs |
| RoHS compliance (e3 suffix) | Meets EU Directive 2011/65/EU with annealed matte-tin plating; compatible with lead-free reflow profiles |
Applications
| Industrial Power Supply Reference | Aerospace Voltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback divider in isolated DC-DC converters for factory automation PLCs. IC Role / Device Role / Timing Role: Shunt voltage reference providing 28 V setpoint to error amplifier input. Use Value: Tight ±5% VZ tolerance and +0.085 %/°C TC enable <±1.5% output regulation over −40 °C to +85 °C ambient. |
Use Scenario: Overvoltage protection on 28 V bus in satellite power distribution units. IC Role / Device Role / Timing Role: Transient voltage clamp absorbing surge energy during load dump events. Use Value: Hermetic DO-213AA package withstands 100 krad(Si) total ionizing dose; zero ESD sensitivity prevents latent failure during launch vibration. |
| Medical Instrumentation Bias | Test & Measurement Calibration |
Use Scenario: Generating stable bias for photodiode transimpedance amplifiers in portable blood analyzers. IC Role / Device Role / Timing Role: Low-noise 28 V reference establishing common-mode voltage for analog front-end stages. Use Value: 1 μV/√Hz noise density ensures sub-μV RMS noise floor in 1 kHz–3 kHz bandwidth, critical for ppm-level optical detection. |
Use Scenario: Precision voltage standard in handheld multimeter calibration jigs. IC Role / Device Role / Timing Role: Primary Zener reference against which DMM ADC gain/offset are trimmed. Use Value: 200 Ω ZZT enables <0.5 mV load regulation error at 1 mA sourcing, meeting ANSI/IEEE C37.90.1 traceability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4119UR-1 (Microsemi) | Includes internal metallurgical bond; qualified to JAN/JANTXV standards; identical VZ, ZZT, and thermal specs | Required for military/aerospace programs demanding MIL-PRF-19500 screening and radiation assurance | Select 1N4119UR-1 when compliance with MIL-STD-883 Class B testing and 100 krad(Si) TID is mandatory |
| BZX84-C27LT1G (onsemi) | SOT-23 plastic package; 27 V nominal VZ; ±5% tolerance; 15 Ω ZZT; max PD = 300 mW; not radiation-hardened | Suitable for commercial-grade consumer electronics where cost and board space outweigh reliability needs | Choose BZX84-C27LT1G only for non-critical, low-power, cost-sensitive applications with no radiation or hermeticity requirement |
Compared with 1N4119UR/TR, the 1N4119UR-1 adds military qualification and radiation tolerance without altering electrical behavior, while BZX84-C27LT1G trades robustness and voltage accuracy for compact size and lower cost-making it unsuitable for high-reliability or precision reference use cases.
Availability
1N4119UR/TR is available at Aetrix Electronics and suitable for industrial power supply reference, aerospace voltage clamp, medical instrumentation bias, and test & measurement calibration requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4119UR/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 analog, RF, and radiation-hardened components for defense, aerospace, and industrial markets.
The 1N4119UR/TR belongs to Microsemi's legacy DO-213AA glass Zener family, engineered for applications demanding hermetic sealing, ESD insensitivity, and stable voltage regulation under extreme thermal and radiation stress.
FAQ
What is the Zener voltage tolerance for 1N4119UR/TR?
The 1N4119UR/TR has a nominal Zener voltage of 28 V with a standard tolerance of ±5%, as defined in JEDEC registration and confirmed in Microsemi's Rev D datasheet. No suffix indicates this standard tolerance; tighter tolerances (±2% or ±1%) require C or D suffixes, which are not present in the 1N4119UR/TR part number.
Does 1N4119UR/TR have a cathode band marking?
Yes, the 1N4119UR/TR features a single black cathode band on the glass body, identifying the cathode terminal. Per datasheet polarity definition, the banded end must be held at a higher potential than the anode for proper Zener regulation, and this marking is consistent across all DO-213AA-packaged parts in the series.
What is the maximum power dissipation for 1N4119UR/TR at 75°C ambient?
At 75 °C ambient temperature on FR4 with 1 oz Cu, the 1N4119UR/TR derates to approximately 375 mW, based on its 300 °C/W junction-to-ambient thermal resistance and Figure 2 derating curve. Full 0.5 W rating applies only at TA ≤ 25 °C or TEC ≤ 100 °C per the datasheet's thermal specifications.
Is 1N4119UR/TR RoHS compliant?
Yes, the "e3" suffix in 1N4119UR/TR confirms RoHS compliance per EU Directive 2011/65/EU. The device uses annealed matte-tin plating on end caps and meets MIL-STD-750 Method 2026 solderability requirements, supporting both SnPb and lead-free reflow processes.
Can 1N4119UR/TR replace axial-leaded 1N4119 in existing designs?
No direct replacement is assured: 1N4119UR/TR is surface-mount DO-213AA (MELF), whereas axial-leaded 1N4119 uses DO-35. Mechanical footprint, thermal path, and soldering process differ fundamentally. Migration requires PCB redesign, thermal validation, and requalification per application requirements.
1N4119UR/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):
- 28 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 21.28 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
1N4119UR/TR FAQ
1.How can I place an order for 1N4119UR/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4119UR/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 1N4119UR/TR reliable?
The price and inventory of 1N4119UR/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4119UR/TR is usually 5 days.
3.What payment methods are accepted for 1N4119UR/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4119UR/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4119UR/TR?
1N4119UR/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4119UR/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 1N4119UR/TR?
For technical support, including 1N4119UR/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4119UR/TR requirements.
6.How does Aetrix verify that 1N4119UR/TR is sourced from the original manufacturer or authorized distributors?
All 1N4119UR/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 1N4119UR/TR meets industry standards.
7.What is the process for return or replacement of 1N4119UR/TR?
All 1N4119UR/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4119UR/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 1N4119UR/TR part is unused and in its original packaging.
Return procedure for 1N4119UR/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4119UR/TR Tags
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MMBZ5240B-7-F
Diodes Incorporated
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onsemi
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