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Microchip Technology 1N3047BUR-1/TR
- Part No.:
- 1N3047BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N3047BUR-1/TR.pdf
- Description:
- DIODE ZENER 130V 1.5W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,867
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Product details
Overview
1N3047BUR-1/TR from Microsemi is a surface-mount, hermetically sealed glass Zener diode in DO-213AB (MELF) package, rated for 1.5 W power dissipation at 25°C, with nominal Zener voltage of 130 V ±5%, Zener test current of 1.9 mA, and maximum Zener impedance of 700 Ω at IZT - used for precision voltage regulation in high-reliability power supply feedback and overvoltage protection circuits.
For engineers reviewing the 1N3047BUR-1/TR datasheet, 1N3047BUR-1/TR pinout, 1N3047BUR-1/TR application, or 1N3047BUR-1/TR equivalent, key selection criteria include its 130 V Zener voltage tolerance, low reverse leakage (≤0.5 μA @ 104 V), -65°C to +175°C operating temperature range, radiation-hardened construction, and RoHS-compliant e3 variant availability.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain stable output voltage across wide current (IZK = 0.25 mA to IZM = 10.35 mA) and temperature (-65°C to +175°C) ranges. Its metallurgically enhanced internal contact design reduces thermal resistance (120°C/W on FR4) and improves long-term reliability under thermal cycling.
The DO-213AB MELF glass package provides hermetic sealing, low parasitic capacitance (specified in Figure 2), ESD insensitivity, and inherent radiation hardness per MicroNote 050 - distinguishing it from plastic-packaged Zeners in aerospace, downhole, and military applications where environmental robustness is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 130 V ±5% at IZT = 1.9 mA - defines precise regulation point for feedback loops in high-voltage DC-DC converters. |
| Power Dissipation | 1.5 W at 25°C ambient (derated to 1.25 W on FR4 board) - supports sustained operation in compact, thermally constrained layouts. |
| Zener Impedance (ZZT) | 700 Ω max at IZT - ensures minimal output voltage variation under dynamic load changes in regulation circuits. |
| Reverse Leakage (IR) | ≤0.5 μA at VR = 104 V - enables low-power standby modes without regulation drift in battery-backed systems. |
| Operating Temperature | -65°C to +175°C - qualified for extended-range industrial, aerospace, and oilfield electronics without derating penalties. |
| Thermal Resistance | 120°C/W junction-to-ambient on FR4 (1 oz Cu) - requires verified pad layout per datasheet page 3 for thermal compliance. |
| Capacitance | Specified in Figure 2 (typical vs. reverse voltage) - supports RF filtering and noise-sensitive analog reference designs. |
Pinout & Package
DO-213AB (MELF) glass package: hermetically sealed, cylindrical, leadless surface-mount construction with cathode band marking; terminals are axial end caps - no discrete pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode End (banded) | Regulated Output Terminal | Connected to higher-potential node in reverse-bias configuration; voltage referenced to anode for regulation. |
| Anode End (unbanded) | Reference/Return Terminal | Typically tied to system ground or lower-potential rail; completes Zener conduction path during breakdown. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic Glass MELF Construction | Eliminates moisture ingress and intermetallic degradation - extends lifetime in humid, high-temperature environments. |
| Metallurgically Enhanced Contacts | Reduces thermal resistance and contact resistance - improves power handling stability and long-term Zener voltage drift performance. |
| Radiation Hardness | Inherently radiation-tolerant per MicroNote 050 - suitable for space-grade and nuclear instrumentation without additional shielding. |
| Low ESD Sensitivity | No special handling required - simplifies assembly and field service in uncontrolled electrostatic environments. |
| MIL-PRF-19500 Screening Options | MQ/MX/MV prefixes enable JAN/JANTX/JANTXV qualification - meets defense and aerospace procurement requirements. |
Applications
| High-Voltage Power Supply Feedback | Aerospace Voltage Reference |
|---|---|
Use Scenario: Regulating output of 200–300 V DC-DC converters in avionics power modules. IC Role / Device Role / Timing Role: Two-terminal Zener reference providing stable 130 V feedback threshold to error amplifier. Use Value: Tight 5% voltage tolerance and low tempco (0.095%/°C) minimize output drift across -55°C to +125°C operational envelope. |
Use Scenario: Precision voltage clamping in satellite bus protection circuits exposed to total ionizing dose. IC Role / Device Role / Timing Role: Overvoltage clamp protecting downstream FET gates and ADC inputs during transient events. Use Value: Hermetic glass seal and radiation hardness ensure functional integrity after >100 krad(Si) exposure without parameter shift. |
| Downhole Instrumentation Protection | Industrial Motor Drive Snubber |
Use Scenario: Voltage stabilization in high-temperature logging tools operating at 175°C wellbore conditions. IC Role / Device Role / Timing Role: Primary Zener reference for sensor excitation circuitry in pressure/temperature transducers. Use Value: Full -65°C to +175°C rating with no derating - eliminates need for external thermal compensation networks. |
Use Scenario: Snubbing inductive kickback from 480 V AC motor drives during IGBT switching transitions. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping flyback spikes above 130 V to protect gate drivers. Use Value: Low 700 Ω Zener impedance ensures fast response to <100 ns spikes while sustaining 10.35 mA peak current. |
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; 1.0 W rating; no RoHS e3 suffix standard. | Requires through-hole PCB layout; unsuitable for high-density SMT assemblies. | Select when legacy through-hole compatibility or lower-cost procurement is prioritized over surface-mount density. |
| MMBZ5263B (SOT-23) | 130 V Zener, but only 0.35 W rating, ±5% tolerance, plastic package, max IZM = 3.8 mA. | Limited to low-power signal-level regulation; not rated for high-temp or radiation environments. | Choose only for cost-sensitive consumer-grade applications where thermal and reliability margins are relaxed. |
Compared with 1N3047B and MMBZ5263B, the 1N3047BUR-1/TR delivers 1.5 W power handling in a compact MELF form factor, full military-grade temperature and radiation resilience, and hermetic reliability - making it the sole option for mission-critical high-voltage regulation where long-term parametric stability is non-negotiable.
Availability
1N3047BUR-1/TR is available at Aetrix Electronics and suitable for high-reliability power supply feedback, aerospace voltage reference, downhole instrumentation protection, and industrial motor drive snubber applications requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N3047BUR-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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and high-voltage analog components for defense, aerospace, and industrial markets.
The 1N3016BUR-1 through 1N3051BUR-1 series was designed specifically to replace legacy DO-13 Zeners with surface-mount equivalents offering higher power (1.5 W), hermetic glass reliability, and MIL-PRF-19500 screening capability - targeting harsh-environment voltage regulation.
FAQ
What is the Zener voltage tolerance and test condition for 1N3047BUR-1/TR?
The 1N3047BUR-1/TR has a nominal Zener voltage of 130 V with ±5% tolerance, measured at a Zener test current (IZT) of 1.9 mA under thermal equilibrium at 25°C. This tolerance is indicated by the "B" suffix per Note 1 in the datasheet, and applies across the full operating temperature range with a temperature coefficient of 0.095%/°C.
Is 1N3047BUR-1/TR RoHS compliant?
Yes, the 1N3047BUR-1/TR is RoHS compliant when ordered with the "e3" suffix (as shown in the part number). The device uses annealed matte-tin plating per MIL-STD-750 Method 2026 and meets lead-free soldering requirements with a maximum solder temperature of 260°C for 10 seconds.
What package type does 1N3047BUR-1/TR use, and how is polarity marked?
The 1N3047BUR-1/TR uses the DO-213AB (MELF) glass package - a cylindrical, leadless surface-mount outline. Polarity is marked by a single cathode band on one end cap; the banded end must be held positive relative to the unbanded anode end during Zener operation.
Can 1N3047BUR-1/TR be used in radiation-intensive environments?
Yes, the 1N3047BUR-1/TR is inherently radiation-hardened per Microsemi MicroNote 050 due to its hermetically sealed glass construction and metallurgical design. It is qualified for use in space, nuclear, and high-altitude applications where total ionizing dose tolerance exceeds 100 krad(Si) without parameter degradation.
What is the maximum steady-state power dissipation for 1N3047BUR-1/TR on a standard FR4 PCB?
When mounted on a standard FR4 PCB with 1 oz copper and the recommended footprint, the 1N3047BUR-1/TR delivers 1.25 W steady-state power at 25°C ambient. Derating follows the curve in Figure 1, reaching zero power at 150°C ambient - with thermal resistance specified as 120°C/W junction-to-ambient.
1N3047BUR-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):
- 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/TR FAQ
1.How can I place an order for 1N3047BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3047BUR-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 1N3047BUR-1/TR reliable?
The price and inventory of 1N3047BUR-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 1N3047BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N3047BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3047BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3047BUR-1/TR?
1N3047BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3047BUR-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 1N3047BUR-1/TR?
For technical support, including 1N3047BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3047BUR-1/TR requirements.
6.How does Aetrix verify that 1N3047BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N3047BUR-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 1N3047BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N3047BUR-1/TR?
All 1N3047BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N3047BUR-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 1N3047BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N3047BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3047BUR-1/TR Tags
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