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Microchip Technology 1N3038BUR-1/TR
- Part No.:
- 1N3038BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N3038BUR-1/TR.pdf
- Description:
- DIODE ZENER 56V 1W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,092
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Product details
Overview
1N3038BUR-1/TR from Microsemi is a hermetically sealed, metallurgically bonded, surface-mount Zener diode in DO-213AB (MELF/LL41) package, rated for 1 W DC power dissipation, with nominal Zener voltage of 56 V at 4.5 mA test current, dynamic impedance of 750 Ω at IZT, and maximum reverse leakage current of 0.25 µA at 42.6 V. It serves as a precision voltage reference or regulator in high-reliability power supply feedback paths.
For engineers reviewing the 1N3038BUR-1/TR datasheet, 1N3038BUR-1/TR pinout, 1N3038BUR-1/TR application, or 1N3038BUR-1/TR equivalent, key selection criteria include its ±5% voltage tolerance (B-grade), -55 °C to +175 °C operating junction temperature range, 50 °C/W junction-to-end-cap thermal resistance, and MIL-PRF-19500/115 qualification options (JAN/JANTX/JANTXV).
Technical Context
This device implements a silicon planar Zener structure with double-plug glass hermetic sealing and metallurgically enhanced internal contact design-enabling low thermal resistance and stable regulation across wide temperature excursions. Its breakdown behavior is characterized by a sharp knee (IZK = 4.5 mA), with dynamic impedance measured under 10% rms AC modulation superimposed on IZT.
The DO-213AB MELF package provides axial symmetry and minimal parasitic inductance/capacitance, supporting high-frequency stability in feedback loops. Polarity is defined by a cathode band; operation requires the banded end to be positive relative to the opposite terminal during Zener conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V ±5% at 4.5 mA - defines regulated output voltage in shunt regulator circuits |
| Power Dissipation (PD) | 1.0 W - maximum continuous DC power at TEC ≤ 125 °C, derates linearly to zero at 175 °C |
| Zener Impedance (ZZT) | 750 Ω at IZT = 4.5 mA - determines regulation sensitivity to load current changes |
| Reverse Leakage (IR) | 0.25 µA max at VR = 42.6 V - ensures minimal quiescent current in standby mode |
| Junction Temperature Range | -55 °C to +175 °C - supports operation in aerospace, downhole, and military environments |
| Thermal Resistance (RθJEC) | 50 °C/W - enables thermal management via end-cap mounting to heatsink or PCB copper |
| Forward Voltage (VF) | 1.2 V max at 200 mA - relevant for polarity verification and ESD-safe forward-bias testing |
Pinout & Package
DO-213AB (MELF/LL41) hermetically sealed glass package with axial symmetry; cathode identified by single black band; no leads-requires solder reflow onto end-cap pads per recommended layout (A = 7.00 mm, B = 1.8 mm, C = 2.8 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener anode connection point | Must be held at higher potential than anode to enable reverse-biased regulation; marks polarity for correct PCB orientation |
| Anode (unbanded end) | Zener cathode connection point | Connected to system ground or lower-potential node; forms return path for Zener current during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass double-plug construction | Eliminates moisture ingress and long-term parameter drift-critical for 20+ year field life in sealed systems |
| Metallurgically bonded internal contacts | Reduces thermal resistance and improves reliability under thermal cycling (e.g., -55 °C ↔ +125 °C) |
| MIL-PRF-19500/115 qualification (JAN/JANTX/JANTXV) | Validated screening for radiation hardness, burn-in, and lot acceptance testing per military standards |
| Low ESD sensitivity | No special handling required-compatible with standard SMT assembly lines without ionization or grounding protocols |
| Non-RoHS and RoHS-compliant versions | e3 suffix denotes matte-tin finish on copper-clad steel terminals for lead-free reflow compatibility |
Applications
| Avionics Power Monitoring | Downhole Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating reference voltage for analog-to-digital converters in flight control sensor modules exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 56 V bias to op-amp gain stages and ADC input dividers. Use Value: Maintains <±0.5% output accuracy over -55 °C to +125 °C due to low αVZ (0.103 %/°C) and hermetic stability. |
Use Scenario: Clamping transient overvoltage on 4–20 mA loop-powered sensors deployed in oil/gas wellheads at 175 °C ambient. IC Role / Device Role / Timing Role: Overvoltage protection element placed across loop supply rails to limit fault energy. Use Value: Withstands 175 °C junction temperature and delivers predictable 56 V clamping with <0.25 µA leakage at 42.6 V. |
| Spacecraft Power Bus Regulation | Military Radar Pulse Modulator Biasing |
Use Scenario: Providing reference voltage for DC-DC converter error amplifiers in satellite power distribution units. IC Role / Device Role / Timing Role: Precision Zener reference in feedback network of isolated flyback controllers. Use Value: Radiation-hardened per MicroNote 050; maintains regulation integrity after 100 krad(Si) total ionizing dose exposure. |
Use Scenario: Establishing stable bias voltage for gate drivers in high-voltage pulse modulators used in ground-based radar transmitters. IC Role / Device Role / Timing Role: High-stability shunt regulator supplying fixed 56 V to MOSFET gate bias networks. Use Value: Low dynamic impedance (750 Ω) minimizes ripple-induced timing jitter in nanosecond-scale pulse edges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3038B-1 | Axial DO-41 package; same electrical specs but higher thermal resistance (RθJA ≈ 120 °C/W vs. 50 °C/W) | Suitable for through-hole prototyping or legacy board upgrades where surface mount is not feasible | Select when manual assembly or wave soldering is required; avoid in high-density or thermally constrained layouts |
| SMF56A (ON Semiconductor) | Surface-mount SOD-123 package; 56 V ±5%, 1 W, but non-hermetic polymer body and no MIL qualification | Appropriate for commercial industrial controls where cost and volume outweigh radiation/military requirements | Choose for cost-sensitive, high-volume production with standard reflow profiles-lacks hermeticity and extended temp capability |
Compared with 1N3038B-1 and SMF56A, the 1N3038BUR-1/TR uniquely combines DO-213AB MELF packaging, hermetic glass sealing, MIL-PRF-19500/115 qualification, and 175 °C junction rating-making it the only option for space-grade or high-reliability embedded systems requiring both thermal robustness and long-term parametric stability.
Availability
1N3038BUR-1/TR is available at Aetrix Electronics and suitable for avionics power monitoring, downhole sensor signal conditioning, and spacecraft power bus regulation requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N3038BUR-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, radiation-hardened, and military-qualified components for aerospace, defense, and industrial markets.
The 1N3038BUR-1/TR belongs to Microsemi's legacy MIL-PRF-19500/115-qualified Zener diode family, engineered specifically for mission-critical voltage regulation where hermeticity, thermal resilience, and long-term parameter stability are non-negotiable.
FAQ
What is the Zener voltage tolerance for 1N3038BUR-1/TR?
The 1N3038BUR-1/TR has a nominal Zener voltage of 56 V with a ±5% tolerance, indicated by the "B" in its nomenclature. This means the actual VZ falls between 53.2 V and 58.8 V when measured at 4.5 mA and 25 °C. The tolerance remains valid across the full -55 °C to +175 °C operating range, supported by its low temperature coefficient of 0.103 %/°C.
Is 1N3038BUR-1/TR suitable for lead-free reflow soldering?
Yes-the 1N3038BUR-1/TR is compatible with lead-free reflow processes. Its terminals are finished with matte tin (RoHS-compliant e3 version), and it withstands peak solder temperatures up to 260 °C for 10 seconds per MIL-STD-750, method 2026. The glass MELF body remains structurally stable under these conditions without cracking or seal degradation.
Does 1N3038BUR-1/TR require derating above 125 °C?
Yes-1N3038BUR-1/TR must be derated linearly starting at 125 °C junction temperature, reaching zero power dissipation at 175 °C. For example, at 150 °C, maximum allowable power drops to 0.5 W. Derating is based on thermal resistance from junction to end cap (50 °C/W), so effective cooling via end-cap thermal interface is essential for high-temperature operation.
How is polarity identified on 1N3038BUR-1/TR?
Polarity on the 1N3038BUR-1/TR is marked by a single black cathode band on one end of the DO-213AB glass body. During Zener regulation, the banded end must be connected to the higher-potential node (anode of the Zener), while the unbanded end connects to the lower-potential node (cathode). Reversing polarity subjects the device to forward conduction only, with VF ≤ 1.2 V at 200 mA.
What is the maximum reverse leakage current for 1N3038BUR-1/TR?
The maximum reverse leakage current (IR) for 1N3038BUR-1/TR is 0.25 µA, specified at VR = 42.6 V (75% of nominal VZ). This ultra-low leakage ensures minimal power loss in high-impedance reference circuits and supports accurate voltage sensing in battery-powered or energy-harvesting systems where standby current must remain sub-microamp.
1N3038BUR-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF (Glass)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 56 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 110 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 42.6 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AB (MELF, LL41)
1N3038BUR-1/TR FAQ
1.How can I place an order for 1N3038BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3038BUR-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 1N3038BUR-1/TR reliable?
The price and inventory of 1N3038BUR-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 1N3038BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N3038BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3038BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3038BUR-1/TR?
1N3038BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3038BUR-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 1N3038BUR-1/TR?
For technical support, including 1N3038BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3038BUR-1/TR requirements.
6.How does Aetrix verify that 1N3038BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N3038BUR-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 1N3038BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N3038BUR-1/TR?
All 1N3038BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N3038BUR-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 1N3038BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N3038BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3038BUR-1/TR Tags
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