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Microchip Technology 1N3033BUR-1/TR
- Part No.:
- 1N3033BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF
- Datasheet:
-
1N3033BUR-1/TR.pdf
- Description:
- DIODE ZENER 36V 1W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,506
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Product details
Overview
1N3033BUR-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 36 V at 7.0 mA test current, dynamic impedance of 750 Ω at IZT, and maximum reverse leakage current of 0.25 µA at 28.8 V. It serves as a precision voltage reference and regulation element in high-reliability power supply and protection circuits.
For engineers reviewing the 1N3033BUR-1/TR datasheet, 1N3033BUR-1/TR pinout, 1N3033BUR-1/TR application, or 1N3033BUR-1/TR equivalent, key selection considerations include its MIL-PRF-19500/115 qualification (JAN/JANTX/JANTXV options), ±5% voltage tolerance, -55 °C to +175 °C operating temperature range, and low thermal resistance (50 °C/W) enabling stable regulation under thermal stress.
Technical Context
This device operates as a two-terminal voltage regulator in reverse-biased mode, with Zener breakdown engineered for sharp knee characteristics and stable regulation across wide current (7.0 mA IZT to 50 mA IZM) and temperature (-55 °C to +175 °C) ranges. Its glass hermetic seal and metallurgically enhanced internal construction ensure low thermal resistance and radiation hardness per MicroNote 050.
The DO-213AB MELF package provides low parasitic inductance/capacitance and axial coefficient of expansion (+6 ppm/°C) matched to common PCB substrates. It is RoHS-compliant (commercial grade only), solderable per MIL-STD-750 Method 2026, and marked with cathode band polarity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V at 7.0 mA - precise regulation point for mid-range voltage references |
| Power Dissipation (PD) | 1.0 W - supports continuous regulation in compact SMT layouts without forced cooling |
| Dynamic Impedance (ZZT) | 750 Ω at IZT - defines voltage stability under small-signal AC ripple superimposed on DC bias |
| Reverse Leakage Current (IR) | 0.25 µA at 28.8 V - ensures minimal quiescent current loss in standby or low-power modes |
| Junction Temperature Range | -55 °C to +175 °C - enables deployment in aerospace, downhole, and military environments |
| Thermal Resistance (RθJEC) | 50 °C/W - allows predictable junction-to-end-cap thermal modeling for reliability analysis |
| Forward Voltage (VF) | 1.2 V at 200 mA - defines conduction behavior during transient forward events or ESD clamping |
Pinout & Package
Package: DO-213AB (MELF/LL41), hermetically sealed glass cylindrical body with tin/lead or matte-tin finish; cathode identified by single black band; axial COE ≈ +6 ppm/°C; weight ≈ 0.05 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to circuit ground or lower-potential node during Zener operation |
| Cathode | Banded end | Connected to regulated voltage node; must be held positive relative to anode for breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass seal | Prevents moisture ingress and long-term parameter drift in harsh environments |
| Metallurgically bonded construction | Reduces thermal resistance and improves reliability under thermal cycling |
| MIL-PRF-19500/115 qualification | Validated performance for JAN, JANTX, and JANTXV reliability levels in defense systems |
| Low ESD sensitivity | No special handling required-compatible with standard SMT assembly lines |
| Radiation hardness | Inherent tolerance to total ionizing dose (TID), per MicroNote 050 |
Applications
| Avionics Power Conditioning | Downhole Sensor Reference |
|---|---|
|
Use Scenario: Regulating auxiliary rail voltage in flight control interface modules exposed to wide ambient temperature swings and vibration. IC Role / Device Role / Timing Role: Two-terminal Zener reference providing stable 36 V bias for op-amp comparators and ADC references. Use Value: Maintains <±1% output stability over -55 °C to +125 °C due to low αVZ (0.100 %/°C) and hermetic packaging. |
Use Scenario: Precision voltage reference in high-temperature pressure transducers deployed in oil/gas wellbores (up to 175 °C). IC Role / Device Role / Timing Role: Zener diode operating in constant-current mode to generate fixed reference for ratiometric sensor excitation. Use Value: Survives sustained 175 °C junction temperature with no parametric shift, validated per MIL-PRF-19500/115 JANTXV level. |
| Spacecraft Bus Protection | Military Radio Bias Supply |
|
Use Scenario: Overvoltage clamp and reference in satellite power distribution units subject to radiation exposure. IC Role / Device Role / Timing Role: Radiation-hardened Zener used in crowbar circuitry and voltage monitor thresholds. Use Value: Inherent TID tolerance eliminates need for shielding or derating-verified per MicroNote 050. |
Use Scenario: Stable bias generation for RF power amplifier stages in manpack radios operating across desert and arctic conditions. IC Role / Device Role / Timing Role: Primary voltage reference for analog front-end regulators and PLL loop filters. Use Value: Low 0.25 µA leakage at 28.8 V minimizes battery drain in standby mode without compromising turn-on accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3033B-1 | Same electrical specs but in DO-41 axial-leaded package; lacks MIL-PRF-19500/115 qualification | Suitable for commercial prototyping or non-military PCBs where through-hole mounting is preferred | Select when SMT footprint is not required and cost-sensitive commercial-grade performance suffices |
| SMF36A | Surface-mount TVS diode (not Zener); 36 V standoff, 52 V clamping; higher surge capability but looser regulation tolerance | Used for transient suppression-not precision regulation-making it unsuitable for reference applications | Choose only for overvoltage protection; never as a drop-in replacement for voltage reference function |
Compared with 1N3033B-1 and SMF36A, the 1N3033BUR-1/TR uniquely combines SMT compatibility, hermetic reliability, MIL qualification, and tight Zener regulation-making it irreplaceable where reference accuracy, radiation tolerance, and thermal stability are mandatory.
Availability
1N3033BUR-1/TR is available at Aetrix Electronics and suitable for avionics power conditioning, downhole sensor reference, and spacecraft bus protection requiring stable component supply, traceable sourcing, and long-term lifecycle support.
Supply support for 1N3033BUR-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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets, emphasizing radiation tolerance, extended temperature operation, and military qualification.
The 1N3033BUR-1/TR belongs to Microsemi's legacy MIL-PRF-19500/115-qualified Zener diode family, engineered specifically for voltage reference and regulation in mission-critical systems where parameter stability under extreme thermal, mechanical, and radiation stress is non-negotiable.
FAQ
What is the Zener voltage tolerance for 1N3033BUR-1/TR?
The 1N3033BUR-1/TR has a nominal Zener voltage of 36 V with a ±5% tolerance, corresponding to the "B" suffix in its nomenclature. This means the actual VZ falls between 34.2 V and 37.8 V at 7.0 mA test current and 25 °C. The tolerance is guaranteed per MIL-PRF-19500/115 and applies across the full qualified temperature range.
Is 1N3033BUR-1/TR RoHS compliant?
Yes, the 1N3033BUR-1/TR is RoHS compliant (per e3 marking), but only in commercial-grade versions. JAN, JANTX, and JANTXV qualified variants use tin/lead terminations and are exempt from RoHS requirements per MIL-PRF-19500/115. Always verify the specific suffix (e3 present or absent) on the reel label or certificate of compliance.
What is the maximum Zener current (IZM) for 1N3033BUR-1/TR?
The maximum Zener current for 1N3033BUR-1/TR is 50 mA, calculated to maintain 1 W power dissipation at the upper end of its ±5% voltage tolerance (37.8 V × 50 mA = 1.89 W, derated to 1 W via thermal limits). This value is confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0285-1 Rev. 1.
Can 1N3033BUR-1/TR be used in place of 1N3033B-1?
No-1N3033BUR-1/TR and 1N3033B-1 share identical electrical parameters but differ in package (DO-213AB vs. DO-41) and qualification. The 1N3033BUR-1/TR is surface-mount only and MIL-qualified; substituting it for the axial 1N3033B-1 requires PCB redesign and may over-specify reliability. They are not mechanically interchangeable.
What is the temperature coefficient of Zener voltage (αVZ) for 1N3033BUR-1/TR?
The temperature coefficient of Zener voltage for 1N3033BUR-1/TR is +0.100 %/°C, meaning its VZ increases by approximately 36 mV per °C rise in junction temperature. This value is specified in the Electrical Characteristics table and reflects the device's optimized doping profile for mid-voltage Zeners (24–47 V range).
1N3033BUR-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):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 50 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 27.4 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
1N3033BUR-1/TR FAQ
1.How can I place an order for 1N3033BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3033BUR-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 1N3033BUR-1/TR reliable?
The price and inventory of 1N3033BUR-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 1N3033BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N3033BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3033BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3033BUR-1/TR?
1N3033BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3033BUR-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 1N3033BUR-1/TR?
For technical support, including 1N3033BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3033BUR-1/TR requirements.
6.How does Aetrix verify that 1N3033BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N3033BUR-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 1N3033BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N3033BUR-1/TR?
All 1N3033BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N3033BUR-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 1N3033BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N3033BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3033BUR-1/TR Tags
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