My Inquiry
My Account
Microchip Technology 1N3051BUR-1/TR
- Part No.:
- 1N3051BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N3051BUR-1/TR.pdf
- Description:
- DIODE ZENER 200V 1.5W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,729
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N3051BUR-1/TR from Microsemi is a surface-mount 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 200 V ±5% (suffix "B"), 1.2 V max forward voltage at 200 mA, and 6.9 μA max reverse leakage at rated VR. It delivers precise voltage regulation in high-reliability aerospace, defense, and industrial power supply monitoring circuits.
For engineers reviewing the 1N3051BUR-1/TR datasheet, 1N3051BUR-1/TR pinout, 1N3051BUR-1/TR application, or 1N3051BUR-1/TR equivalent, key selection criteria include its hermetically sealed glass MELF construction, -65°C to +175°C operating temperature range, 1500 Ω max Zener impedance at IZT, radiation-hardened performance per MicroNote 050, and RoHS-compliant e3 variant availability.
Technical Context
This device operates as a two-terminal voltage reference, conducting in reverse breakdown to clamp or regulate voltage across load circuits. Its metallurgically enhanced internal contact design ensures low thermal resistance (40°C/W junction-to-end-cap) and stable regulation over wide current (IZK = 0.25 mA to IZM = 6.9 mA) and temperature ranges.
The DO-213AB glass MELF package provides hermetic sealing, ESD insensitivity, and inherently low parasitic capacitance (specified in Figure 2), making it suitable for precision analog sensing and high-density PCB layouts where axial DO-13 parts are impractical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 200 V ±5% at IZT = 1.2 mA - defines regulated output voltage under standard test conditions |
| Power Dissipation (PD) | 1.5 W at TEC < 115°C - maximum continuous power handling at end-cap, derates linearly above that temperature |
| Zener Impedance (ZZT) | 1500 Ω max at IZT - determines regulation stiffness and AC ripple rejection capability |
| Reverse Leakage Current (IR) | 0.5 μA max at VR = 152 V - ensures minimal standby power loss in high-impedance bias networks |
| Operating Temperature Range | -65°C to +175°C - supports deployment in extreme-environment avionics, downhole tools, and military electronics |
| Forward Voltage (VF) | 1.2 V max at IF = 200 mA - limits conduction loss during forward-biased transient events |
| Thermal Resistance (RθJC) | 40°C/W junction-to-end-cap - enables accurate thermal modeling when mounted on heat-sinked metal-core substrates |
Pinout & Package
DO-213AB (MELF) glass hermetic package: cylindrical, leadless, cathode band marked on one end; polarity requires banded end to be positive relative to opposite end during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to higher-potential rail; reverse-biased to maintain stable 200 V reference |
| Anode (unmarked end) | Reference return node | Connected to system ground or lower-potential rail; completes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Hermetically sealed glass MELF construction | Eliminates moisture ingress and long-term parameter drift in humid or corrosive environments |
| Metallurgically enhanced internal contact | Reduces thermal resistance by ~30% vs. standard DO-13 equivalents, improving power handling reliability |
| Radiation hardness per MicroNote 050 | Validated tolerance to total ionizing dose (TID) >100 krad(Si), enabling use in space-grade systems |
| RoHS-compliant e3 variant | Meets EU Directive 2011/65/EU with annealed matte-tin plating, solderable per MIL-STD-750 Method 2026 |
| Tight voltage tolerance options | ±1%, ±2%, ±5%, ±10%, or ±20% available via suffixes D/C/B/A/blank - supports precision feedback loop design |
Applications
| High-Voltage Power Supply Monitoring | Aerospace Voltage Reference |
|---|---|
Use Scenario: Monitoring 200 V DC bus in satellite power distribution units to trigger overvoltage shutdown before critical subsystem damage. IC Role / Device Role / Timing Role: Two-terminal passive voltage clamp providing fail-safe regulation independent of control ICs. Use Value: Hermetic glass seal prevents parameter shift under vacuum and radiation exposure, ensuring consistent 200 V trip point over mission lifetime. |
Use Scenario: Providing stable 200 V reference for analog-to-digital conversion of high-voltage sensor outputs in flight control computers. IC Role / Device Role / Timing Role: Precision Zener reference source feeding ADC input scaling circuitry. Use Value: Low 0.5 μA leakage at 152 V ensures minimal loading error on high-impedance sensor signal paths. |
| Downhole Instrumentation Protection | Military Radar Bias Regulation |
Use Scenario: Clamping transients on 200 V bias rails in oil/gas well logging tools exposed to 175°C ambient temperatures. IC Role / Device Role / Timing Role: High-temperature-stable Zener regulator absorbing surge energy without parametric degradation. Use Value: Guaranteed operation up to +175°C and -65°C enables single-component solution across full downhole thermal profile. |
Use Scenario: Regulating gate drive voltage for GaN HEMTs in pulsed radar transmitter modules requiring stable 200 V bias under thermal cycling. IC Role / Device Role / Timing Role: Primary voltage reference for closed-loop bias control circuitry. Use Value: 1500 Ω Zener impedance ensures minimal regulation error during fast current transients induced by RF pulsing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3051B (DO-13, thru-hole) | Same electrical specs but axial leaded DO-13 package; no surface-mount footprint compatibility | Requires PCB through-hole mounting; unsuitable for high-density SMT assemblies | Select only if legacy board design mandates axial leads or thermal mass from leads improves heat sinking |
| MLL3051B (same die, alternate part number) | Identical electrical and mechanical specifications; Microsemi's internal designation for same device | No functional difference; used interchangeably in sourcing and qualification documentation | Preferred for procurement against Microsemi's internal part numbering system or MIL-PRF-19500 screening orders |
Compared with 1N3051BUR-1/TR, the 1N3051B requires through-hole assembly and lacks MELF's low-parasitic advantages, while MLL3051B offers identical performance with alternate nomenclature-making it ideal for traceability in defense contracts requiring Microsemi internal part numbers.
Availability
1N3051BUR-1/TR is available at Aetrix Electronics and suitable for high-reliability power supply monitoring, aerospace voltage reference, downhole instrumentation protection, and military radar bias regulation requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N3051BUR-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 to replace legacy JEDEC 1N30xx axial Zeners with surface-mount MELF packaging while extending power rating to 1.5 W and qualifying for MIL-PRF-19500/115 screening levels.
FAQ
What is the Zener voltage tolerance for 1N3051BUR-1/TR?
The "B" suffix in 1N3051BUR-1/TR indicates a nominal Zener voltage tolerance of ±5% at 200 V, measured at IZT = 1.2 mA and 25°C. Tighter tolerances (±1%, ±2%) are available with suffixes "D" or "C", respectively, and must be specified at order time.
Does 1N3051BUR-1/TR require special soldering profiles?
Yes - 1N3051BUR-1/TR uses a glass MELF package with tin-lead or RoHS-compliant matte-tin plating, rated for 260°C peak solder temperature for 10 seconds maximum. Reflow profiles must avoid thermal shock; preheating to 150°C and ramp rates ≤3°C/s are recommended per MIL-STD-750 Method 2026.
Can 1N3051BUR-1/TR be used in radiation-intensive environments?
Yes - 1N3051BUR-1/TR is inherently radiation-hardened per Microsemi MicroNote 050, with validated tolerance to total ionizing dose (TID) exceeding 100 krad(Si). This makes it suitable for satellite power systems and nuclear instrumentation where parametric stability under irradiation is critical.
What is the maximum reverse leakage current for 1N3051BUR-1/TR at 152 V?
The maximum reverse leakage current (IR) for 1N3051BUR-1/TR is 0.5 μA at VR = 152 V and 25°C. This low leakage ensures minimal power loss and measurement error in high-impedance reference divider networks commonly used in precision analog circuits.
Is tape-and-reel packaging standard for 1N3051BUR-1/TR?
Yes - the "TR" suffix in 1N3051BUR-1/TR explicitly denotes tape-and-reel packaging per EIA-481-1-A: 12 mm carrier tape, 1500 units per 7-inch reel. This format supports automated SMT placement and is required for high-volume production use of 1N3051BUR-1/TR.
1N3051BUR-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):
- 200 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 1500 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 152 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)
1N3051BUR-1/TR FAQ
1.How can I place an order for 1N3051BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3051BUR-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 1N3051BUR-1/TR reliable?
The price and inventory of 1N3051BUR-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 1N3051BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N3051BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3051BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3051BUR-1/TR?
1N3051BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3051BUR-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 1N3051BUR-1/TR?
For technical support, including 1N3051BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3051BUR-1/TR requirements.
6.How does Aetrix verify that 1N3051BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N3051BUR-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 1N3051BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N3051BUR-1/TR?
All 1N3051BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N3051BUR-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 1N3051BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N3051BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3051BUR-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…
