My Inquiry
My Account
Microchip Technology 1N5261BUR-1
- Part No.:
- 1N5261BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5261BUR-1.pdf
- Description:
- DIODE ZENER 47V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,218
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5261BUR-1 from Microsemi is a 47 V, 500 mW surface-mount Zener diode in DO-213AA (SOD80/MLL34) MELF package, rated for ±5% voltage tolerance at 20 mA test current, with 105 Ω dynamic impedance and +0.095 %/°C temperature coefficient. It delivers stable voltage regulation in power supply reference and overvoltage protection circuits across industrial temperature ranges.
For engineers reviewing the 1N5261BUR-1 datasheet, 1N5261BUR-1 pinout, 1N5261BUR-1 application, or 1N5261BUR-1 equivalent, key selection criteria include Zener voltage accuracy, low dynamic impedance, hermetic glass packaging, thermal resistance (250 °C/W), and MIL-PRF-19500 up-screening capability.
Technical Context
This device operates as a reverse-biased voltage reference, maintaining 47 V regulation at IZT = 20 mA with ZZT = 105 Ω and αVZ = +0.095 %/°C. Its metallurgically bonded glass construction ensures hermetic sealing and radiation hardness per MicroNote 050.
Designed for surface-mount use on FR4 PCBs with 1 oz copper, it exhibits TJ/TSTG = –65 to +175 °C, RθJA = 250 °C/W, and VF ≤ 1.1 V at 200 mA forward current - enabling reliable operation in compact, high-reliability analog subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 47 V ±5% at 20 mA - defines precise regulation point for feedback loops and clamp thresholds |
| Power Dissipation PD | 0.5 W - limits continuous Zener current to ~10.6 mA at 47 V without derating |
| Dynamic Impedance ZZT | 105 Ω at 20 mA - determines output voltage stability under load transients |
| Temp. Coefficient αVZ | +0.095 %/°C - predicts +0.45 V drift over 100 °C ambient change |
| Reverse Leakage IR | ≤0.1 µA at 34 V - ensures minimal quiescent current in high-impedance bias networks |
| Junction Temp. Range | –65 to +175 °C - supports operation in extended industrial and aerospace environments |
Pinout & Package
DO-213AA (SOD80/MLL34) MELF glass package with hermetically sealed metallurgical bond; cathode indicated by single band; end-cap terminals only - no discrete pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode End Cap | Zener Anode Connection | Connected to circuit ground or lower potential node during regulation |
| Anode End Cap | Zener Cathode Connection | Connected to regulated voltage node; banded end is cathode per marking convention |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic Glass Encapsulation | Prevents moisture ingress and long-term parameter drift in humid or harsh environments |
| Metallurgical Bond Construction | Enables inherent radiation hardness per MicroNote 050 and improved thermal cycling reliability |
| MIL-PRF-19500 Up-Screening Option | Supports qualification for military/aerospace applications via optional reliability screening levels |
| Low Capacitance (~1.5 pF) | Minimizes signal coupling and high-frequency noise in precision reference paths |
Applications
| Voltage Reference for Analog ICs | Overvoltage Clamp in Power Supplies |
|---|---|
Use Scenario: Providing stable 47 V reference to op-amp comparators or ADC voltage dividers in industrial sensor signal conditioning. IC Role / Device Role / Timing Role: Precision DC voltage reference source with low tempco and minimal leakage. Use Value: Enables <±0.5% total error budget over –40 to +85 °C due to tight 47 V ±5% tolerance and +0.095 %/°C drift. | Use Scenario: Clamping transient surges above 47 V on 48 V telecom power rails to protect downstream DC-DC converters. IC Role / Device Role / Timing Role: Shunt overvoltage protection element absorbing surge energy until crowbar triggers. Use Value: Sustains 0.5 W dissipation without thermal runaway, verified across –65 to +175 °C junction range. |
| Current Source Bias Network | ESD-Safe Signal Level Translation |
Use Scenario: Generating constant current for LED drivers or transistor biasing using 47 V Zener + series resistor. IC Role / Device Role / Timing Role: Stable voltage node defining current magnitude via Ohm's law. Use Value: Maintains <2% current variation over 10:1 load current range due to 105 Ω dynamic impedance. | Use Scenario: Level-shifting RS-485 receiver inputs from 3.3 V logic to 47 V common-mode range while surviving ESD events. IC Role / Device Role / Timing Role: Non-sensitive ESD clamp (MIL-STD-750 Method 1020) with minimal parasitic capacitance. Use Value: Adds <1.5 pF capacitance and withstands >8 kV HBM without parameter shift, preserving signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5261B-1 | Same 47 V, ±5%, 0.5 W rating but in axial DO-35 (DO-204AH) package | Requires through-hole PCB layout; higher RθJA (~300 °C/W) limits power handling in dense layouts | Select for legacy through-hole designs or prototyping where reflow compatibility is not required |
| BZX55C47 | 47 V, ±5%, 0.5 W in DO-35; higher ZZT (120 Ω), no MIL-PRF-19500 screening option | Lacks radiation hardness certification and hermetic glass seal; limited to commercial-grade environments | Select for cost-sensitive consumer applications where radiation tolerance and long-term stability are non-critical |
Compared with 1N5261B-1 and BZX55C47, the 1N5261BUR-1 offers superior thermal performance in SMT layouts, guaranteed radiation hardness, and optional military screening - making it preferred for space-constrained, high-reliability analog systems requiring stable 47 V references.
Availability
1N5261BUR-1 is available at Aetrix Electronics and suitable for voltage reference, overvoltage clamping, and current-source biasing applications requiring stable component supply, long-term parametric consistency, and extended temperature operation.
Supply support for 1N5261BUR-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 analog, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N52xxBUR-1 series was designed to deliver JEDEC-standard Zener regulation in hermetic surface-mount packages - targeting applications demanding stability, longevity, and environmental resilience beyond commercial-grade alternatives.
FAQ
What is the Zener voltage tolerance and test condition for the 1N5261BUR-1?
The 1N5261BUR-1 has a nominal Zener voltage of 47 V with a ±5% tolerance, measured at a test current IZT of 20 mA and ambient temperature of 25 °C. This tolerance is confirmed per the "B" suffix in the part number and applies across the full operating temperature range when used within its power and thermal limits.
Does the 1N5261BUR-1 have a defined pinout or lead configuration?
The 1N5261BUR-1 uses a DO-213AA (SOD80/MLL34) MELF glass package with two end-cap terminals - no traditional pins. The cathode is marked by a single band; the banded end connects to the higher-potential node during Zener operation. Polarity must be observed to avoid forward conduction instead of regulation.
Is the 1N5261BUR-1 suitable for high-reliability or aerospace applications?
Yes - the 1N5261BUR-1 is inherently radiation-hard per Microsemi MicroNote 050 and supports optional up-screening to MIL-PRF-19500 specifications. Its hermetic glass construction, –65 to +175 °C junction range, and metallurgical bond make it qualified for aerospace, defense, and critical industrial systems where long-term stability is mandatory.
What is the maximum reverse leakage current for the 1N5261BUR-1, and at what voltage is it specified?
The 1N5261BUR-1 exhibits a maximum reverse leakage current IR of 0.1 µA, specified at a reverse voltage VR of 34 V - which is 72% of its nominal 47 V Zener voltage. This ultra-low leakage supports high-impedance bias networks and precision reference circuits without introducing measurable error.
Can the 1N5261BUR-1 be used in RoHS-compliant designs?
Yes - RoHS-compliant versions of the 1N5261BUR-1 are available with the "e3" suffix (e.g., 1N5261BUR-1e3), featuring annealed matte-tin plating on end caps. These meet commercial-grade RoHS requirements; however, MIL-PRF-19500 screened variants remain non-RoHS due to tin-lead plating requirements for solderability and reliability.
1N5261BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 105 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 36 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N5261BUR-1 FAQ
1.How can I place an order for 1N5261BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5261BUR-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 1N5261BUR-1 reliable?
The price and inventory of 1N5261BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5261BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N5261BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5261BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5261BUR-1?
1N5261BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5261BUR-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 1N5261BUR-1?
For technical support, including 1N5261BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5261BUR-1 requirements.
6.How does Aetrix verify that 1N5261BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N5261BUR-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 1N5261BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N5261BUR-1?
All 1N5261BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5261BUR-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 1N5261BUR-1 part is unused and in its original packaging.
Return procedure for 1N5261BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5261BUR-1 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…
