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Microchip Technology 1N3047BUR-1
- Part No.:
- 1N3047BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N3047BUR-1.pdf
- Description:
- DIODE ZENER 130V 1.5W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,944
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Product details
Overview
1N3047BUR-1 from Microsemi is a surface-mount glass-hermetic Zener diode in DO-213AB (MELF) package, rated for 1.5 W steady-state power dissipation at end-cap temperature <115°C, with nominal Zener voltage 130 V ±5%, Zener test current 1.9 mA, and maximum Zener impedance 700 Ω at IZT - used for precision voltage regulation in high-reliability aerospace and industrial power supply feedback loops.
For engineers reviewing the 1N3047BUR-1 datasheet, 1N3047BUR-1 pinout, 1N3047BUR-1 application, or 1N3047BUR-1 equivalent, key selection criteria include its 130 V Zener voltage tolerance, low 0.5 µA reverse leakage at VR = 100 V, hermetic glass MELF construction, -65°C to +175°C operating temperature range, and radiation-hardened performance per MicroNote 050.
Technical Context
This device operates as a two-terminal voltage reference, conducting in reverse breakdown with sharp knee characteristics verified by dual-point Zener impedance measurement per MicroNote 202. Its metallurgically enhanced internal contact design reduces thermal resistance and improves long-term stability under thermal cycling.
The DO-213AB package enables surface-mount assembly with 260°C/10s solder tolerance and delivers 40°C/W junction-to-end-cap thermal resistance. It is specified for operation across -65°C to +175°C ambient and end-cap temperatures, with capacitance characterized versus reverse voltage (Figure 2) and temperature coefficient of +0.095%/°C at 130 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 130 V ±5% at IZT = 1.9 mA - defines stable regulation point for feedback networks |
| Power Dissipation | 1.5 W at TEC < 115°C - supports compact thermal design with end-cap heatsinking |
| Zener Impedance ZZT | 700 Ω at IZT = 1.9 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage IR | 0.5 µA max at VR = 100 V - maintains high impedance in non-regulating state |
| Operating Temp | -65°C to +175°C - qualified for extended-range military and downhole applications |
| Thermal Resistance | 40°C/W junction-to-end-cap - enables direct thermal coupling to PCB copper or metal chassis |
| Capacitance | Specified vs. VR (see Figure 2) - critical for high-frequency noise filtering in regulation paths |
Pinout & Package
DO-213AB (MELF) glass package: hermetically sealed, leadless cylindrical body with cathode band marking; terminals are axial ends - banded end is cathode, operated with cathode positive relative to anode for Zener regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener breakdown terminal | Connected to regulated output node; polarity must be observed to avoid forward conduction |
| Anode (unbanded end) | Reference/reference return | Typically tied to ground or feedback divider low-side; establishes reverse bias condition |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift in humid or corrosive environments |
| Metallurgically enhanced contacts | Reduces interfacial thermal resistance and improves reliability under thermal shock |
| Radiation hardness | Inherently radiation-tolerant per MicroNote 050 - suitable for space and nuclear instrumentation |
| Low ESD sensitivity | No special handling required - simplifies manufacturing and field service logistics |
| e3 RoHS compliance option | Matte-tin plating meets JEDEC J-STD-020 and MIL-STD-750 Method 2026 |
Applications
| High-Voltage Power Supply Feedback | Aerospace Voltage Reference |
|---|---|
Use Scenario: Regulating 130 V output in isolated DC-DC converters for avionics power distribution. IC Role / Device Role / Timing Role: Primary Zener reference in TL431-based shunt regulator feedback network. Use Value: Maintains ±0.65 V regulation accuracy over -55°C to +125°C with <0.5 µA leakage at 100 V reverse bias. |
Use Scenario: Providing stable 130 V reference in satellite payload telemetry conditioning circuits. IC Role / Device Role / Timing Role: Radiation-hardened voltage clamp protecting ADC input stages from transient overvoltage. Use Value: Hermetic glass seal and inherent radiation tolerance eliminate need for additional shielding or derating. |
| Industrial Motor Drive Snubber | Downhole Instrumentation Reference |
Use Scenario: Clamping inductive kickback in 120 VAC motor control H-bridge snubber networks. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing energy during MOSFET turn-off. Use Value: 1.5 W power rating and 700 Ω dynamic impedance limit voltage overshoot to ≤135 V at 1.9 mA. |
Use Scenario: Precision voltage reference in borehole pressure sensor signal conditioning at 175°C ambient. IC Role / Device Role / Timing Role: Stable Zener element in ratiometric bridge excitation circuit. Use Value: Validated operation up to +175°C with <0.1%/°C tempco drift - enables calibration-free operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3047B (DO-13) | Same electrical specs but axial-leaded DO-13 package; no surface-mount capability | Requires through-hole PCB layout and wave soldering; unsuitable for high-density SMT assemblies | Select only when legacy through-hole compatibility or manual prototyping is required |
| MLL3047B | Identical electrical and mechanical specs; alternate Microsemi part number per Note 3 | No functional difference - same DO-213AB MELF package, 130 V, 1.5 W, e3 RoHS option available | Direct cross-reference; use MLL3047B when sourcing via legacy Microsemi documentation or distributor catalogs |
Compared with 1N3047B and MLL3047B, the 1N3047BUR-1 provides identical Zener performance in the industry-standard surface-mount DO-213AB outline, enabling automated placement while maintaining hermetic reliability and radiation tolerance - critical for modern high-density, high-reliability designs.
Availability
1N3047BUR-1 is available at Aetrix Electronics and suitable for high-voltage power supply feedback, aerospace voltage reference, industrial motor drive snubber, and downhole instrumentation reference requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N3047BUR-1 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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N3047BUR-1 belongs to Microsemi's legacy glass Zener diode family designed for mission-critical voltage regulation where hermetic sealing, wide temperature operation, and radiation hardness are mandatory - not general-purpose replacement diodes.
FAQ
What is the Zener voltage tolerance for 1N3047BUR-1?
The 1N3047BUR-1 has a nominal Zener voltage of 130 V with a tolerance of ±5%, indicated by the "B" suffix per Note 1. This tolerance is measured at 25°C with thermal equilibrium and applies across the full operating temperature range of -65°C to +175°C. Tighter tolerances (e.g., ±2% or ±1%) require suffixes C or D, which are not applicable to the standard 1N3047BUR-1.
Is 1N3047BUR-1 suitable for surface-mount reflow assembly?
Yes, the 1N3047BUR-1 is qualified for surface-mount reflow with a maximum solder temperature of 260°C for 10 seconds, per MIL-STD-750 Method 2026. Its DO-213AB MELF package uses annealed matte-tin plating and is compatible with standard FR4 PCB footprints defined in the datasheet. Thermal resistance is specified at 40°C/W junction-to-end-cap when properly mounted.
Does 1N3047BUR-1 meet MIL-PRF-19500 screening requirements?
The base 1N3047BUR-1 is not screened to MIL-PRF-19500. However, Microsemi offers screened versions using prefixes: MQ (JAN), MX (JANTX), MV (JANTXV), or MSP (JANS). For example, MX1N3047BUR-1 meets JANTX requirements. Screening requires explicit prefix addition to the part number and is documented in Microsemi's source control drawings.
What is the maximum reverse leakage current for 1N3047BUR-1?
The maximum reverse leakage current (IR) for 1N3047BUR-1 is 0.5 µA at VR = 100 V, as specified in the Electrical Characteristics table on page 2. This value is lower than JEDEC-registered equivalents and reflects the improved hermeticity and metallurgical construction of the DO-213AB variant.
How does the thermal performance of 1N3047BUR-1 compare to axial DO-13 versions?
The 1N3047BUR-1 offers superior thermal performance versus axial DO-13 versions due to its DO-213AB package geometry and metallurgically enhanced contacts: it achieves 40°C/W junction-to-end-cap thermal resistance (vs. ~60°C/W typical for DO-13), enabling higher sustained power dissipation in thermally constrained SMT layouts without forced cooling.
1N3047BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF (Glass)
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 130 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 700 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 98.8 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AB (MELF, LL41)
1N3047BUR-1 FAQ
1.How can I place an order for 1N3047BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3047BUR-1 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 1N3047BUR-1 reliable?
The price and inventory of 1N3047BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N3047BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N3047BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3047BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3047BUR-1?
1N3047BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3047BUR-1 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 1N3047BUR-1?
For technical support, including 1N3047BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3047BUR-1 requirements.
6.How does Aetrix verify that 1N3047BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N3047BUR-1 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 1N3047BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N3047BUR-1?
All 1N3047BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N3047BUR-1, 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 1N3047BUR-1 part is unused and in its original packaging.
Return procedure for 1N3047BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3047BUR-1 Tags
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Diodes Incorporated
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