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Microchip Technology 1N3019BUR-1
- Part No.:
- 1N3019BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF
- Datasheet:
-
1N3019BUR-1.pdf
- Description:
- DIODE ZENER 9.1V 1W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,036
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Product details
Overview
1N3019BUR-1 from Microsemi is a surface-mount glass-hermetic Zener diode in DO-213AB (MELF) package, rated for 1.5 W power dissipation at 25°C, with nominal Zener voltage of 9.1 V ±5%, 28 mA test current, 5 Ω dynamic impedance at IZT, and maximum reverse leakage of 0.5 μA at 6.9 V. It delivers stable voltage regulation in high-density power supply feedback loops and precision reference circuits.
For engineers reviewing the 1N3019BUR-1 datasheet, 1N3019BUR-1 pinout, 1N3019BUR-1 application, or 1N3019BUR-1 equivalent, this page provides verified electrical parameters, thermal resistance (40 °C/W junction-to-end-cap), hermetic MELF packaging details, MIL-qualified screening options (MX/MV prefixes), and RoHS-compliant e3 variant availability.
Technical Context
This device operates as a two-terminal voltage reference, leveraging metallurgically enhanced internal contact construction to achieve low thermal resistance (40 °C/W junction-to-end-cap) and stable regulation across –65°C to +175°C. Its glass-hermetic DO-213AB package eliminates moisture ingress and supports radiation-hardened operation per MicroNote 050.
The 1N3019BUR-1 exhibits tight Zener knee characteristics (verified via dual-point impedance measurement per Note 2), specified capacitance (see Figure 2), and nonsensitivity to ESD-enabling reliable use in aerospace, defense, and industrial control systems where long-term parametric stability is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 9.1 V ±5% - defines regulated output voltage under 28 mA test current with sharp breakdown knee |
| Power Dissipation | 1.5 W at TEC < 115°C - enables compact thermal design using end-cap heatsinking |
| Zener Impedance | 5 Ω @ IZT = 28 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage Current | 0.5 μA @ VR = 6.9 V - guarantees low quiescent current in high-impedance bias networks |
| Operating Temperature | –65°C to +175°C - supports deployment in extended-environment avionics and downhole electronics |
| Thermal Resistance | 40 °C/W junction-to-end-cap - allows direct thermal coupling to metalized PCB areas or chassis |
| Forward Voltage | ≤1.2 V @ 200 mA - ensures predictable clamping behavior during overvoltage events |
Pinout & Package
Package: DO-213AB (Glass MELF), hermetically sealed, cathode indicated by single band; terminals plated with annealed matte-tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Banded End | Cathode | Must be biased positive relative to opposite end for Zener regulation; marking aligns with JEDEC polarity convention |
| Non-banded End | Anode | Reference/ground node in shunt regulator configuration; forms return path for Zener current |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic Glass MELF Construction | Eliminates humidity-induced parameter drift and enables >10-year reliability in sealed enclosures |
| Metallurgically Enhanced Contact | Reduces thermal resistance by 30% vs. standard DO-13 equivalents, improving power handling at elevated temperatures |
| RoHS Compliance (e3 suffix) | Meets EU Directive 2011/65/EU without compromising glass-seal integrity or voltage tolerance |
| MIL-PRF-19500 Screening Options | MQ/MX/MV prefixes enable JAN/JANTX/JANTXV qualification for space-grade and military programs |
| Low Capacitance Profile | Typical CJ < 2 pF (per Figure 2) - preserves signal integrity in RF detector and fast-switching clamp applications |
Applications
| Switch-Mode Power Supply Feedback | Aerospace Voltage Reference |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 9.1 V threshold for error amplifier comparison. Use Value: Tight ±5% tolerance and low 5 Ω ZZT minimize output voltage drift across line/load/temperature variations. |
Use Scenario: Stabilizes reference voltage for ADC front-end in satellite telemetry subsystems. IC Role / Device Role / Timing Role: Precision DC reference source operating continuously at –55°C to +125°C ambient. Use Value: Hermetic glass seal and radiation hardness (MicroNote 050) prevent parametric shift in orbital radiation environment. |
| Industrial Sensor Signal Conditioning | Defense System Overvoltage Clamp |
Use Scenario: Provides stable excitation voltage for bridge-based pressure transducers in oilfield monitoring equipment. IC Role / Device Role / Timing Role: Low-leakage (0.5 μA) Zener reference ensuring microamp-level sensor bias accuracy. Use Value: Ultra-low IR enables high-impedance bias networks without measurable offset error. |
Use Scenario: Protects FPGA I/O banks from ESD and surge events in ground vehicle control units. IC Role / Device Role / Timing Role: Fast-response shunt clamp activated above 9.1 V breakdown threshold. Use Value: Nonsensitive to ESD and capable of absorbing 1.5 W transient power without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3019B (DO-13 axial) | Same Zener voltage (9.1 V), but lower 1.0 W rating and higher thermal resistance (60 °C/W junction-to-ambient) | Requires through-hole mounting and larger board area; unsuitable for high-density SMT layouts | Select only when legacy DO-13 footprint compatibility is mandatory and power derating is acceptable |
| MMBZ5240B (SOT-23) | Lower 0.35 W rating, ±5% tolerance, but smaller footprint; Zener impedance 17 Ω @ 20 mA | Limited to low-power portable electronics; cannot sustain 157.5 mA IZM or operate beyond +150°C | Choose for cost-sensitive consumer designs where thermal and radiation requirements are relaxed |
Compared with 1N3019B and MMBZ5240B, the 1N3019BUR-1 uniquely combines 1.5 W power handling, DO-213AB hermetic reliability, and MIL-qualified screening paths-making it the only option for high-reliability SMT voltage regulation demanding >100,000-hour field life.
Availability
1N3019BUR-1 is available at Aetrix Electronics and suitable for switch-mode power supplies, aerospace telemetry systems, industrial sensor interfaces, and defense-grade overvoltage protection requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N3019BUR-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) specializes in high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N3019BUR-1 belongs to Microsemi's legacy glass Zener diode family designed for mission-critical voltage regulation where hermeticity, radiation tolerance, and parametric stability outweigh cost or size constraints.
FAQ
What is the Zener voltage tolerance for 1N3019BUR-1?
The 1N3019BUR-1 has a nominal Zener voltage of 9.1 V with a ±5% tolerance, indicated by the "B" suffix per Note 1. This tolerance is verified at 28 mA test current and 25°C ambient, ensuring predictable regulation in precision feedback networks where tighter voltage control is required than standard ±20% devices provide.
Does 1N3019BUR-1 support MIL-qualified screening?
Yes, the 1N3019BUR-1 supports MIL-PRF-19500/115 screening when ordered with MQ (JAN), MX (JANTX), or MV (JANTXV) prefixes-e.g., MX1N3019BUR-1. These variants undergo rigorous environmental stress testing including temperature cycling, burn-in, and radiation exposure validation per Microsemi MicroNote 050, making them suitable for spaceflight and military platforms.
What is the maximum Zener current (IZM) for 1N3019BUR-1?
The maximum Zener current for 1N3019BUR-1 is 157.5 mA, calculated from its 1.5 W power rating and 9.1 V nominal Zener voltage (P = V × I). This value assumes thermal equilibrium at end-cap temperature < 115°C and is validated per Figure 1 derating curve-enabling robust operation in high-current shunt regulator topologies.
Is 1N3019BUR-1 RoHS compliant?
Yes, the 1N3019BUR-1 is RoHS compliant when ordered with the "e3" suffix (i.e., 1N3019BUR-1e3), confirming lead-free matte-tin plating per EU Directive 2011/65/EU. The glass hermetic seal remains fully intact, preserving long-term parameter stability without compromising solderability or thermal performance.
How does the DO-213AB package of 1N3019BUR-1 differ from DO-13?
The 1N3019BUR-1 uses DO-213AB (glass MELF), not DO-13. While both share JEDEC-registered electrical specs, DO-213AB offers surface-mount compatibility, lower parasitic inductance, and improved thermal coupling to PCB copper. Its 2.39–2.66 mm diameter and 4.80–5.20 mm length (per Page 3 dimensions) require specific reflow pad layout-not interchangeable with axial DO-13 footprints.
1N3019BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 6 Ohms
- Current - Reverse Leakage @ Vr:
- 25 µA @ 6.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -55°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AB
1N3019BUR-1 FAQ
1.How can I place an order for 1N3019BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3019BUR-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 1N3019BUR-1 reliable?
The price and inventory of 1N3019BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N3019BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N3019BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3019BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3019BUR-1?
1N3019BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3019BUR-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 1N3019BUR-1?
For technical support, including 1N3019BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3019BUR-1 requirements.
6.How does Aetrix verify that 1N3019BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N3019BUR-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 1N3019BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N3019BUR-1?
All 1N3019BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N3019BUR-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 1N3019BUR-1 part is unused and in its original packaging.
Return procedure for 1N3019BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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