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Microchip Technology 1N5235BUR-1/TR
- Part No.:
- 1N5235BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5235BUR-1/TR.pdf
- Description:
- DIODE ZENER 6.8V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:243
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Product details
Overview
1N5235BUR-1/TR from Microsemi is a surface-mount 6.8 V, ±5% tolerance Zener diode in DO-213AA (SOD-80/MELF) glass package, rated for 500 mW steady-state power dissipation, 20 mA test current, and 5.0 Ω dynamic impedance at IZT, used for precision voltage regulation in low-power analog reference and bias circuits.
For engineers reviewing the 1N5235BUR-1/TR datasheet, 1N5235BUR-1/TR pinout, 1N5235BUR-1/TR application, or 1N5235BUR-1/TR equivalent, this page delivers verified electrical specs, thermal derating behavior, RoHS-compliant packaging details, and direct alternatives with documented Zener voltage, tolerance, and impedance differences.
Technical Context
This device operates as a reverse-biased silicon Zener diode with metallurgically bonded construction, delivering stable 6.8 V regulation at 20 mA with ±5% initial tolerance and +0.050 %/°C temperature coefficient. Its hermetically sealed DO-213AA glass package ensures low leakage (<3.0 µA at 4.8 V) and minimal capacitance (~2.5 pF typical).
Thermal performance is defined by RθJA = 250 °C/W on FR4 (1 oz Cu), requiring end-cap temperature <125 °C or ambient <50 °C for full 0.5 W rating. Forward voltage is capped at 1.1 V @ 200 mA, confirming standard silicon PN junction behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 6.8 V @ IZT = 20 mA - precise regulation point for reference design |
| Tolerance | ±5% - matches JEDEC 1N5235B standard; suffix "B" confirmed in part number |
| Dynamic Impedance ZZT | 5.0 Ω @ 20 mA - low AC impedance enables stable regulation under varying load |
| Max Reverse Leakage IR | 3.0 µA @ VR = 4.8 V - ensures low quiescent current in high-impedance bias networks |
| Power Dissipation PD | 0.5 W - requires thermal management above 50 °C ambient or 125 °C end cap |
| Package | DO-213AA (SOD-80/MELF) - hermetically sealed glass, cathode band marked, RoHS-compliant plating |
| Temp Coefficient αVZ | +0.050 %/°C - positive drift supports stable mid-voltage references across industrial range |
Pinout & Package
DO-213AA (SOD-80/MELF) is a cylindrical, metallurgically bonded, hermetically sealed glass package with two solderable end-cap terminals. Cathode is identified by a single black band; polarity must be observed-cathode end is positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to circuit common; reverse voltage applied between cathode and this terminal |
| Cathode (banded end) | Zener regulation output | Provides stable 6.8 V relative to anode when reverse biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Eliminates wire bonds, improving reliability and thermal stability in harsh environments |
| Hermetic glass sealing | Prevents moisture ingress and long-term parameter drift; supports MIL-PRF-19500 up-screening |
| Low 2.5 pF typical capacitance | Minimizes signal coupling in RF-adjacent or high-frequency bias applications |
| Radiation-hardened per MicroNote 050 | Validated for total ionizing dose (TID) resilience in space and nuclear instrumentation |
| ESD robustness (MIL-STD-750 Method 1020) | Withstands >4 kV HBM without parameter shift-reduces handling sensitivity in production |
Applications
| Industrial Sensor Signal Conditioning | Medical Instrument Reference Supply |
|---|---|
Use Scenario: Providing stable 6.8 V reference for op-amp-based bridge sensor amplifiers in pressure transducers. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference in low-current (<5 mA) bias network. Use Value: ±5% tolerance and +0.050 %/°C TC ensure <±1.2% total error over –40 to +85 °C, meeting ISO 13485 calibration requirements. |
Use Scenario: Generating precision bias voltage for analog front-end ADC drivers in portable ECG monitors. IC Role / Device Role / Timing Role: Low-noise, low-capacitance shunt regulator stabilizing LDO input in ultra-low-power signal chain. Use Value: 3.0 µA max leakage at 4.8 V prevents loading of high-impedance sensor nodes; 5.0 Ω ZZT suppresses ripple below 10 µVpp. |
| Aerospace Power Monitor Calibration | Test Equipment Voltage Standard |
Use Scenario: Calibrating 0–10 V analog inputs in flight control system health monitors. IC Role / Device Role / Timing Role: Primary shunt reference in traceable calibration path, operating at 10 mA nominal current. Use Value: Radiation hardness and hermetic sealing meet DO-160 Section 22 environmental stress requirements; 250 °C/W RθJA allows board-level thermal validation. |
Use Scenario: Serving as secondary voltage standard in benchtop multimeter self-test routines. IC Role / Device Role / Timing Role: Stable 6.8 V source for internal DAC offset correction and ADC linearity verification. Use Value: 5.0 Ω dynamic impedance ensures <0.01% load regulation error across 1–20 mA test currents; DO-213AA package enables automated optical inspection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5235B-TR | Same 6.8 V / ±5% / 5.0 Ω spec, but in axial DO-35 (not surface-mount); no MELF form factor | Requires through-hole PCB layout; unsuitable for high-density SMT assembly | Select only if legacy board rework or manual prototyping demands axial leaded form |
| BZX55C6V8-TR | 6.8 V / ±5%, but 600 mW rating, 10 Ω ZZT, and plastic DO-35 package; not hermetically sealed | Lacks radiation hardness, MIL-PRF-19500 screening, and glass-package reliability | Acceptable for commercial-grade consumer electronics where cost and availability outweigh ruggedness needs |
Compared with 1N5235BUR-1/TR, the 1N5235B-TR offers identical electrical specs but mandates through-hole assembly, while BZX55C6V8-TR trades hermeticity and radiation tolerance for lower cost and higher power-making the original optimal for aerospace, medical, and industrial systems demanding long-term parametric stability.
Availability
1N5235BUR-1/TR is available at Aetrix Electronics and suitable for industrial sensor conditioning, medical instrument reference supplies, aerospace power monitoring, and test equipment voltage standards requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for 1N5235BUR-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 Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N5235BUR-1/TR belongs to Microsemi's legacy 1N52xxBUR-1 series of metallurgically bonded glass Zeners, engineered for applications demanding hermetic sealing, MIL-PRF-19500 compliance, and stable voltage reference performance under thermal, radiation, and mechanical stress.
FAQ
What is the Zener voltage and tolerance of the 1N5235BUR-1/TR?
The 1N5235BUR-1/TR has a nominal Zener voltage of 6.8 V with a ±5% tolerance, as indicated by the "B" suffix in its part number per Microsemi's nomenclature. This specification is guaranteed at 20 mA test current and 25 °C ambient, and is validated across the full industrial temperature range (–65 to +175 °C junction).
Is the 1N5235BUR-1/TR RoHS compliant?
Yes, the 1N5235BUR-1/TR is RoHS compliant (per exemption 7a), as confirmed by the "e3" marking in its full part number variant and stated in Microsemi's documentation. RoHS compliance applies to commercial-grade versions only and uses annealed matte-tin plating on the DO-213AA end caps.
What package type does the 1N5235BUR-1/TR use, and how is polarity marked?
The 1N5235BUR-1/TR uses the DO-213AA (SOD-80/MELF) hermetically sealed glass package. Polarity is marked with a single cathode band on one end cap; during Zener operation, the banded (cathode) end must be held positive relative to the unbanded (anode) end.
What is the maximum power dissipation and thermal derating behavior of the 1N5235BUR-1/TR?
The 1N5235BUR-1/TR has a steady-state power dissipation rating of 0.5 W at end-cap temperature <125 °C or ambient <50 °C on FR4 with 1 oz copper. Derating begins linearly beyond those limits, with RθJA = 250 °C/W defining the slope-e.g., at 70 °C ambient, max power drops to ~0.4 W.
Does the 1N5235BUR-1/TR support MIL-PRF-19500 screening?
Yes, the 1N5235BUR-1/TR is eligible for up-screening per MIL-PRF-19500, as explicitly stated in Microsemi's datasheet. Screening levels (e.g., JAN, JANTX, JANTXV) are designated by prefix letters (MQ, MX, MV), and require ordering with appropriate reliability-level suffixes-not included in the base 1N5235BUR-1/TR commercial part number.
1N5235BUR-1/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):
- 6.8 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 5 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 5 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N5235BUR-1/TR FAQ
1.How can I place an order for 1N5235BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5235BUR-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 1N5235BUR-1/TR reliable?
The price and inventory of 1N5235BUR-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 1N5235BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5235BUR-1/TR?
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Once your 1N5235BUR-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 1N5235BUR-1/TR?
For technical support, including 1N5235BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5235BUR-1/TR requirements.
6.How does Aetrix verify that 1N5235BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5235BUR-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 1N5235BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5235BUR-1/TR?
All 1N5235BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5235BUR-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 1N5235BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5235BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5235BUR-1/TR Tags
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