My Inquiry
My Account
Microchip Technology 1N3037BUR-1/TR
- Part No.:
- 1N3037BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N3037BUR-1/TR.pdf
- Description:
- DIODE ZENER 51V 1W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,694
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N3037BUR-1 from Microsemi is a hermetically sealed, metallurgically bonded surface-mount Zener diode in DO-213AB (MELF) package, rated for 1 W DC power dissipation, with nominal Zener voltage of 51 V at 5.0 mA test current, ±5% tolerance, and dynamic impedance of 95 Ω at IZT - used for precision voltage regulation in high-reliability aerospace and defense power supply circuits.
For engineers reviewing the 1N3037BUR-1 datasheet, 1N3037BUR-1 pinout, 1N3037BUR-1 application, or 1N3037BUR-1 equivalent, key selection criteria include its MIL-PRF-19500/115 qualification (JANTXV available), low reverse leakage (≤0.25 µA @ 40.8 V), temperature coefficient of +0.103 %/°C, and suitability for high-density, low-parasitic, radiation-hardened designs.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable reference voltage across wide current (5.0 mA IZT to 95 mA IZM) and temperature (–55 °C to +175 °C) ranges. Its double-plug glass construction and metallurgically enhanced internal contact deliver low thermal resistance (RθJEC = 50 °C/W) and high reliability under thermal cycling stress.
The device exhibits sharp knee characteristics (verified via dual-point Zener impedance measurement per MicroNote 202), with ZZK = 700 Ω near breakdown threshold (IZK), enabling stable regulation even at low bias currents. Its axial COE (~+6 ppm/°C) requires matched PCB substrate selection to minimize mechanical stress during reflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 51 V ±5% at 5.0 mA - defines precise regulation point for mid-range power supply references. |
| Power Dissipation (PD) | 1.0 W - supports continuous operation up to 95 mA Zener current before thermal derating begins at 125 °C. |
| Zener Impedance (ZZT) | 95 Ω at IZT - ensures minimal output voltage variation under load transients in feedback loops. |
| Reverse Leakage (IR) | ≤0.25 µA at 40.8 V - guarantees negligible error current in high-impedance reference paths. |
| Temp. Coefficient (αVZ) | +0.103 %/°C - enables predictable drift compensation in temperature-stable voltage references. |
| Junction Temp. Range | –55 °C to +175 °C - qualified for extended operation in avionics, downhole, and space-grade environments. |
| Package Outline | DO-213AB (MELF, LL41) - leadless cylindrical form factor optimized for automated SMT placement and low parasitic inductance. |
Pinout & Package
DO-213AB (MELF) package: hermetically sealed glass cylinder with cathode band marking; terminals are metallurgically bonded copper-clad steel ends, solderable per MIL-STD-750 Method 2026. Polarity: banded end is cathode (positive terminal during Zener operation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Ground-reference terminal | Connected to circuit common; establishes reference node for regulated output voltage. |
| Cathode (banded end) | Zener regulation node | Connected to input rail; reverse-biased to clamp voltage at 51 V ±5% under specified current. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass seal | Prevents moisture ingress and long-term parameter drift in harsh environmental conditions. |
| Metallurgically bonded junction | Reduces thermal resistance (RθJEC = 50 °C/W) and improves power cycling endurance. |
| MIL-PRF-19500/115 qualification | Available in JANTXV grade - meets screening, testing, and traceability requirements for military/aerospace use. |
| Radiation hardness | Inherently radiation-tolerant per Microsemi MicroNote 050 - suitable for space-qualified systems without shielding. |
| ESD insensitivity | No special handling required - withstands human-body-model ESD events without parameter shift. |
Applications
| Aerospace Power Regulation | Defense System Reference |
|---|---|
Use Scenario: Regulating auxiliary 51 V rail in satellite power distribution units under wide thermal excursions. IC Role / Device Role / Timing Role: Zener diode providing stable voltage reference for DC-DC converter feedback networks. Use Value: Maintains ≤±0.5% output stability over –55 °C to +125 °C due to low αVZ and hermetic sealing. |
Use Scenario: Precision voltage clamp in radar receiver front-end protection circuits. IC Role / Device Role / Timing Role: Overvoltage suppression element safeguarding sensitive RF amplifiers from transient surges. Use Value: Low leakage (≤0.25 µA) prevents signal path loading; fast response preserves RF integrity. |
| Industrial Control Reference | Downhole Instrumentation |
Use Scenario: Generating calibrated 51 V reference for analog-to-digital conversion in PLC analog input modules. IC Role / Device Role / Timing Role: Primary voltage reference source for 16-bit SAR ADC biasing and scaling. Use Value: Tight 5% tolerance and low dynamic impedance ensure <0.1 LSB error contribution across operating life. |
Use Scenario: Voltage stabilization in high-temperature logging tools deployed at 175 °C wellbore environments. IC Role / Device Role / Timing Role: High-temp Zener regulator maintaining sensor excitation voltage under extreme thermal stress. Use Value: Validated operation up to +175 °C junction temperature with no parameter degradation or seal failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3037B-1 (DO-41) | Same electrical specs but axial-leaded DO-41 package; higher thermal resistance (RθJA ≈ 120 °C/W vs. 50 °C/W). | Used in through-hole prototyping or legacy board upgrades where SMT is not feasible. | Select when manual assembly or compatibility with existing DO-41 footprints is required. |
| SMF51A (SOD-123FL) | Surface-mount but polymer-encapsulated; lower power rating (0.4 W), higher leakage (≤5 µA), no MIL qualification. | Suitable for commercial-grade consumer electronics where cost and size outweigh reliability needs. | Choose only for non-critical, low-cost applications lacking radiation, thermal, or military compliance requirements. |
Compared with 1N3037B-1 and SMF51A, the 1N3037BUR-1 delivers superior thermal performance, hermetic reliability, and military-grade qualification - making it the sole choice for mission-critical, high-temperature, or radiation-exposed Zener regulation tasks.
Availability
1N3037BUR-1 is available at Aetrix Electronics and suitable for aerospace power regulation, defense system reference design, and industrial control reference applications requiring stable component supply, full traceability, and long-term obsolescence management.
Supply support for 1N3037BUR-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 Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and military-qualified analog and discrete components.
The 1N3037BUR-1 belongs to Microsemi's legacy MIL-PRF-19500/115-qualified Zener diode family, engineered specifically for voltage reference and regulation in aerospace, defense, and industrial systems demanding extreme environmental resilience.
FAQ
What is the Zener voltage tolerance for 1N3037BUR-1?
The 1N3037BUR-1 has a nominal Zener voltage of 51 V with a ±5% tolerance, meaning the actual measured VZ falls between 48.45 V and 53.55 V at 5.0 mA test current and 25 °C. This tolerance is designated by the "B" suffix in the part nomenclature and is verified per MIL-PRF-19500/115 screening requirements.
Is 1N3037BUR-1 qualified for military applications?
Yes, the 1N3037BUR-1 is qualified per MIL-PRF-19500/115 and available in JAN, JANTX, and JANTXV reliability levels. The "UR" in the part number indicates the DO-213AB surface-mount variant, and JANTXV-grade units undergo additional screening including burn-in, thermal shock, and lot acceptance testing per military standards.
What is the maximum Zener current (IZM) for 1N3037BUR-1?
The maximum Zener current for 1N3037BUR-1 is 95 mA at 25 °C ambient, calculated to sustain 1.0 W power dissipation while staying within safe junction temperature limits. At elevated temperatures, this value must be derated linearly starting at 125 °C, reaching zero at 175 °C per Figure 1 in the datasheet.
Does 1N3037BUR-1 require special PCB layout considerations?
Yes - the 1N3037BUR-1 has an axial coefficient of expansion (COE) of approximately +6 ppm/°C, so the PCB substrate (e.g., FR-4, polyimide, or ceramic) must be selected to closely match this value to avoid mechanical stress-induced failure during reflow or thermal cycling. Pad layout per datasheet dimensions (A = 7.00 mm, B = 1.8 mm, C = 2.8 mm) is mandatory for reliable solder joint formation.
How does the hermetic glass seal of 1N3037BUR-1 improve long-term reliability?
The hermetic double-plug glass seal in the 1N3037BUR-1 prevents moisture ingress and atmospheric contamination over decades of operation, eliminating parameter drift caused by oxidation or corrosion. This construction is validated for >10,000 hours of life testing at 125 °C and is essential for systems where field replacement is impossible - such as satellites or deep-well instrumentation.
1N3037BUR-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):
- 51 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 38.8 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AB (MELF, LL41)
1N3037BUR-1/TR FAQ
1.How can I place an order for 1N3037BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3037BUR-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 1N3037BUR-1/TR reliable?
The price and inventory of 1N3037BUR-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 1N3037BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N3037BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3037BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3037BUR-1/TR?
1N3037BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3037BUR-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 1N3037BUR-1/TR?
For technical support, including 1N3037BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3037BUR-1/TR requirements.
6.How does Aetrix verify that 1N3037BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N3037BUR-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 1N3037BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N3037BUR-1/TR?
All 1N3037BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N3037BUR-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 1N3037BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N3037BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3037BUR-1/TR Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
