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Microchip Technology 1N3044BUR-1/TR
- Part No.:
- 1N3044BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF
- Datasheet:
-
1N3044BUR-1/TR.pdf
- Description:
- DIODE ZENER 100V 1W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,852
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Product details
Overview
1N3044BUR-1/TR from Microsemi is a surface-mount, hermetically sealed glass 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 100 V ±5%, Zener test current 2.5 mA, and maximum Zener impedance 350 Ω at IZT - used for precision voltage regulation in high-reliability aerospace and industrial power supply circuits.
For engineers reviewing the 1N3044BUR-1/TR datasheet, 1N3044BUR-1/TR pinout, 1N3044BUR-1/TR application, or 1N3044BUR-1/TR equivalent, key selection criteria include its 100 V Zener voltage tolerance, low reverse leakage (≤0.5 µA at 76 V), radiation-hardened construction, -65°C to +175°C operating range, and RoHS-compliant e3 variant availability.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage across wide current (IZK = 0.25 mA to IZM = 13.5 mA) and temperature (-65°C to +175°C) ranges. Its metallurgically enhanced internal contact design reduces thermal resistance (40°C/W junction-to-end-cap) and improves long-term reliability under thermal cycling.
The device features hermetic double-slug glass construction, nonsensitive ESD behavior, and specified capacitance (see Figure 2). It is not a junction-isolated or planar silicon device but a legacy glass-encapsulated Zener built to MIL-PRF-19500/115 screening standards when ordered with MQ/MX/MV prefixes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 100 V ±5% at 2.5 mA - defines precise regulation point for feedback loops in DC-DC converters and voltage references. |
| Maximum Power Dissipation | 1.5 W at TEC < 115°C - supports high-density board layouts without forced cooling in sealed enclosures. |
| Zener Impedance (ZZT) | 350 Ω at IZT = 2.5 mA - ensures minimal output voltage variation under load transients in analog sensing circuits. |
| Reverse Leakage Current (IR) | ≤0.5 µA at VR = 76 V - enables low-power standby regulation without significant quiescent current penalty. |
| Operating Temperature Range | -65°C to +175°C - qualified for downhole oil/gas instrumentation and avionics power conditioning where extended thermal margins are mandatory. |
| Package Outline | DO-213AB (MELF) - leadless cylindrical glass body enabling automated placement and minimizing parasitic inductance in RF-bias networks. |
| Thermal Resistance | 40°C/W junction-to-end-cap - allows direct thermal coupling to heatsink pads or metal-core PCBs for sustained 1.5 W operation. |
Pinout & Package
DO-213AB (MELF) glass package: hermetically sealed, cylindrical, leadless, cathode band marked on one end. Polarity: banded end is cathode (positive during Zener operation). Terminals are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener anode connection point in reverse bias | Must be held at higher potential than anode to enable breakdown; critical for correct orientation in voltage clamp topologies. |
| Anode (unbanded end) | Zener cathode connection point in reverse bias | Reference node tied to system ground or return path; low-inductance layout required to preserve regulation stability. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and intermetallic degradation - extends lifetime beyond 20 years in sealed military modules. |
| Metallurgically enhanced contact | Reduces thermal resistance by ~30% vs. standard DO-13 equivalents - enables higher continuous power in same footprint. |
| Radiation hardness | Inherently qualified per Microsemi MicroNote 050 - suitable for satellite power bus monitoring without additional shielding. |
| Low ESD sensitivity | No handling precautions beyond standard static-safe protocols - simplifies assembly in Class 0 ESD environments. |
| e3 RoHS compliance option | Matte-tin plating meets JEDEC J-STD-020 reflow profile - supports lead-free manufacturing without derating or process change. |
Applications
| Avionics Power Monitoring | Downhole Oilfield Sensors |
|---|---|
Use Scenario: Regulating reference voltage for ADCs measuring turbine generator output in flight control systems. IC Role / Device Role / Timing Role: Precision Zener voltage reference providing stable 100 V bias for isolated current-sense amplifiers. Use Value: Maintains ±0.5% regulation over -55°C to +125°C ambient with <0.1% drift/year - eliminates recalibration in 10-year service intervals. |
Use Scenario: Clamping transient overvoltage on 4–20 mA sensor loops exposed to lightning-induced surges in wellhead controllers. IC Role / Device Role / Timing Role: Primary Zener clamp protecting downstream op-amps and microcontrollers from >150 V spikes. Use Value: Withstands 1.5 W surge for 100 ms without parameter shift - prevents field failures in unattended remote installations. |
| Industrial PLC Analog Inputs | Satellite Power Bus Regulation |
Use Scenario: Providing stable 100 V reference for 16-bit DACs generating programmable high-voltage outputs in factory automation systems. IC Role / Device Role / Timing Role: Low-drift Zener reference source feeding precision resistor-divider networks. Use Value: Temperature coefficient of +0.09%/°C minimizes gain error across 0–70°C operating range - maintains 12-bit linearity. |
Use Scenario: Stabilizing voltage references in radiation-intensive LEO satellite power distribution units. IC Role / Device Role / Timing Role: Radiation-hardened Zener element in redundant voltage supervisor circuits. Use Value: No parametric shift after 100 krad(Si) total ionizing dose - certified for 5-year orbital mission life without replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3044B (DO-13 axial) | Same electrical specs but axial leaded DO-13 package; 1.0 W rating at 25°C ambient; no MELF thermal performance. | Requires through-hole mounting and larger board area; unsuitable for high-density SMT assemblies. | Select only if legacy through-hole compatibility or manual prototyping is required. |
| MMBZ5242B (SOT-23) | Surface-mount but silicon planar; 200 mW rating; 10 V nominal; not radiation-hardened; 500 Ω ZZT. | Limited to low-power consumer electronics; cannot replace 1N3044BUR-1/TR in high-temp or high-reliability contexts. | Use only for cost-sensitive, non-critical 10 V reference applications with <85°C ambient. |
Compared with 1N3044B and MMBZ5242B, the 1N3044BUR-1/TR uniquely delivers 100 V Zener regulation in a thermally optimized, radiation-tolerant, hermetic MELF package - making it irreplaceable for aerospace, energy, and defense applications demanding >1.2 W continuous power and >15-year field life.
Availability
1N3044BUR-1/TR is available at Aetrix Electronics and suitable for avionics power monitoring, downhole oilfield sensors, and industrial PLC analog inputs requiring stable component supply, long-lifecycle support, and traceable sourcing for high-reliability deployments.
Supply support for 1N3044BUR-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 aerospace, defense, and industrial markets.
The 1N3044BUR-1/TR belongs to Microsemi's legacy glass Zener diode family designed for mission-critical voltage regulation where hermeticity, thermal stability, and long-term parametric consistency outweigh cost or size constraints.
FAQ
What is the Zener voltage tolerance for 1N3044BUR-1/TR?
The 1N3044BUR-1/TR has a nominal Zener voltage of 100 V with a tolerance of ±5%, indicated by the "B" suffix per Microsemi documentation. This tolerance is guaranteed at 2.5 mA test current and 25°C ambient. The 1N3044BUR-1/TR does not support tighter tolerances unless ordered with alternate suffixes (e.g., "C" for ±2%), which are not applicable to this specific part number.
Is 1N3044BUR-1/TR RoHS compliant?
Yes, the 1N3044BUR-1/TR is RoHS compliant when ordered with the "e3" suffix, indicating annealed matte-tin plating per JEDEC standards. The base part number 1N3044BUR-1/TR includes the "e3" designation, confirming compliance with Directive 2011/65/EU. Lead content is below threshold limits, and solderability meets MIL-STD-750 Method 2026.
What is the maximum reverse leakage current for 1N3044BUR-1/TR?
The maximum reverse leakage current for 1N3044BUR-1/TR is 0.5 µA at VR = 76 V (76% of nominal Zener voltage), as specified in the Electrical Characteristics table on page 2 of the Microsemi datasheet. This value is measured at 25°C and reflects the device's low-leakage capability essential for high-impedance reference circuits.
Can 1N3044BUR-1/TR be used in radiation-intensive environments?
Yes, the 1N3044BUR-1/TR is inherently radiation-hardened per Microsemi MicroNote 050 and qualifies for space applications without additional testing. Its hermetic glass construction and metallurgical design ensure no parametric shift up to 100 krad(Si), making it suitable for satellite power supervisors and nuclear instrumentation where radiation tolerance is mandatory.
What is the thermal resistance specification for 1N3044BUR-1/TR?
The 1N3044BUR-1/TR has a thermal resistance of 40°C/W junction-to-end-cap and 120°C/W junction-to-ambient when mounted on FR4 with 1 oz copper and the recommended footprint. This dual specification enables accurate thermal modeling: end-cap measurement supports heatsink integration, while ambient value guides board-level thermal design for convection-cooled systems.
1N3044BUR-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 100 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 350 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 76 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
1N3044BUR-1/TR FAQ
1.How can I place an order for 1N3044BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3044BUR-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 1N3044BUR-1/TR reliable?
The price and inventory of 1N3044BUR-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 1N3044BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N3044BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3044BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3044BUR-1/TR?
1N3044BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3044BUR-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 1N3044BUR-1/TR?
For technical support, including 1N3044BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3044BUR-1/TR requirements.
6.How does Aetrix verify that 1N3044BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N3044BUR-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 1N3044BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N3044BUR-1/TR?
All 1N3044BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N3044BUR-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 1N3044BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N3044BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3044BUR-1/TR Tags
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