My Inquiry
My Account
Microchip Technology 1N5243BUR-1
- Part No.:
- 1N5243BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5243BUR-1.pdf
- Description:
- DIODE ZENER 13V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,267
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5243BUR-1 from Microsemi is a 0.5 W surface-mount Zener diode with nominal Zener voltage 13 V at 9.5 mA test current, ±5% tolerance (B suffix), 13 Ω dynamic impedance at IZT, and -65 °C to +175 °C junction temperature range. It serves as a precision voltage reference or shunt regulator in low-power analog circuits, power supply feedback paths, and overvoltage protection.
For engineers reviewing the 1N5243BUR-1 datasheet, 1N5243BUR-1 pinout, 1N5243BUR-1 application, or 1N5243BUR-1 equivalent, key selection criteria include Zener voltage stability across temperature, low dynamic impedance for regulation accuracy, hermetic DO-213AA package suitability for high-reliability environments, and compatibility with MIL-PRF-19500 up-screening options.
Technical Context
This device operates in reverse-biased breakdown mode, delivering stable 13 V regulation at 9.5 mA with 13 Ω dynamic impedance (ZZT) and 0.5 µA maximum reverse leakage at 9.4 V. Its temperature coefficient is +0.079 %/°C, indicating positive drift above 5.1 V threshold.
The metallurgically bonded glass DO-213AA (SOD80/MLL34) MELF package provides hermetic sealing, ESD insensitivity per MIL-STD-750 method 1020, and radiation hardness per MicroNote 050 - enabling use in aerospace, industrial control, and medical electronics where long-term parametric stability is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 13 V at 9.5 mA - defines precise regulation point for feedback or clamping circuits |
| Power Dissipation PD | 0.5 W - limits continuous operating current to ~38 mA at 13 V without derating |
| Dynamic Impedance ZZT | 13 Ω - ensures <130 mV output variation per 10 mA load change near regulation point |
| Reverse Leakage IR | 0.5 µA max at 9.4 V - enables low-error biasing in high-impedance reference networks |
| Temp Coefficient αVZ | +0.079 %/°C - predicts +10.3 mV/°C drift, requiring thermal compensation above 85 °C ambient |
| Junction Temp Range | -65 °C to +175 °C - supports operation in extended industrial, automotive under-hood, and military environments |
| Forward Voltage VF | 1.1 V max at 200 mA - allows use as forward-conducting clamp or polarity indicator when needed |
Pinout & Package
DO-213AA (SOD80/MLL34) MELF glass package: hermetically sealed, metallurgically bonded, cathode band marked on one end cap. Terminals are solderable tin-lead or RoHS-compliant matte-tin plated end caps.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to higher-potential rail; Zener conducts when cathode-to-anode voltage exceeds 13 V |
| Anode (unbanded end) | Reference/return node | Typically grounded or tied to lower-potential bias point; completes regulation current path |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic DO-213AA packaging | Prevents moisture ingress and parametric shift over 20+ year field life in humid or corrosive environments |
| MIL-PRF-19500 up-screening option | Enables qualification for space-grade, avionics, and defense applications requiring lot traceability and burn-in |
| Minimal capacitance (~1.5 pF typical) | Preserves high-frequency signal integrity in RF bias networks and fast transient clamping |
| Radiation hardness (per MicroNote 050) | Withstands >100 krad(Si) total ionizing dose - suitable for low-earth orbit satellite subsystems |
| ESD insensitivity (MIL-STD-750 method 1020) | Eliminates need for external ESD protection in handling and board assembly |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp for MCU I/O |
|---|---|
Use Scenario: Stabilizing output voltage of isolated DC-DC converters via optocoupler feedback loop. IC Role / Device Role / Timing Role: Shunt regulator providing precise 13 V reference to TL431 or optocoupler LED anode. Use Value: 13 Ω dynamic impedance ensures <±0.13 V regulation error across 5–15 mA load variation, maintaining ±1% output accuracy. | Use Scenario: Protecting 3.3 V or 5 V microcontroller GPIO pins from accidental 12 V bus exposure. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting pin voltage to 13 V during fault conditions. Use Value: 0.5 µA leakage at 9.4 V avoids loading sensitive inputs; 1.1 V forward drop enables bidirectional protection when combined with series resistor. |
| High-Temperature Sensor Biasing | Radiation-Hardened Reference Source |
Use Scenario: Providing stable excitation current to RTD or thermistor bridges in engine control units. IC Role / Device Role / Timing Role: Voltage reference generating constant current through precision resistor network. Use Value: +0.079 %/°C tempco and -65 °C to +175 °C rating enable predictable bias current over full automotive under-hood range. | Use Scenario: Generating stable reference voltage in satellite telemetry conditioning circuits exposed to cosmic radiation. IC Role / Device Role / Timing Role: Radiation-hardened Zener reference replacing less robust silicon bandgap references. Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for shielding or redundancy, reducing SWaP-C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5243B-1 | Same electrical specs but DO-35 axial package; no hermetic seal; RθJA = 500 °C/W vs. 250 °C/W | Limited to non-military commercial PCBs; unsuitable for high-vibration or vacuum environments | Select only if axial mounting and lower cost outweigh reliability and thermal performance needs. |
| BZX55C13 | 13 V, ±5%, 500 mW, DO-35; 25 Ω ZZT; no MIL-PRF-19500 screening or radiation hardness data | General-purpose replacement where extended temp range and radiation tolerance are not required | Use for cost-sensitive consumer designs; avoid in aerospace, medical, or high-reliability industrial systems. |
Compared with 1N5243B-1 and BZX55C13, the 1N5243BUR-1 delivers superior thermal resistance (250 vs. 500 °C/W), hermetic reliability, and documented radiation hardness - making it the sole choice for mission-critical analog references where long-term stability under stress is mandatory.
Availability
1N5243BUR-1 is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, high-temperature sensor biasing, and radiation-hardened reference applications requiring stable component supply across extended product lifecycles.
Supply support for 1N5243BUR-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 belongs to Microsemi's legacy Zener regulator product line, engineered specifically for applications demanding hermetic packaging, MIL-PRF-19500 compliance, and proven performance in extreme thermal and radiation environments.
FAQ
What is the Zener voltage tolerance for 1N5243BUR-1?
The 1N5243BUR-1 has a nominal Zener voltage of 13 V with ±5% tolerance, indicated by the "B" suffix in the part number per Microsemi's nomenclature. This means the actual VZ falls between 12.35 V and 13.65 V at 9.5 mA test current and 25 °C ambient, verified per JEDEC JESD201 standards.
Does 1N5243BUR-1 support MIL-PRF-19500 screening?
Yes, the 1N5243BUR-1 supports up-screening per MIL-PRF-19500 - including temperature cycling, steady-state life test, and lot acceptance testing - when ordered with appropriate reliability level prefixes (e.g., MQ, MX, MV, MSP). The base commercial version (no prefix) does not include screening.
What is the maximum reverse leakage current for 1N5243BUR-1?
The maximum reverse leakage current for 1N5243BUR-1 is 0.5 µA at 9.4 V (0.73 × VZ) and 25 °C, as specified in the Electrical Characteristics table on page 3 of T4-LDS-0232-1. This low leakage supports high-impedance reference designs without significant error contribution.
Can 1N5243BUR-1 be used in surface-mount reflow processes?
Yes, the 1N5243BUR-1 is qualified for standard SMT reflow with peak solder temperature up to 260 °C for 10 seconds (TSP), per MIL-STD-750 method 2026. Its DO-213AA package uses annealed matte-tin plating compatible with lead-free and SnPb solder profiles.
Is 1N5243BUR-1 RoHS compliant?
Yes, RoHS-compliant versions of 1N5243BUR-1 are available with the "e3" suffix (e.g., 1N5243BUR-1e3), using annealed matte-tin plating. These meet EU Directive 2011/65/EU and are restricted to commercial-grade ordering - MIL-spec variants retain tin-lead terminations.
1N5243BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 13 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 13 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 9.9 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
1N5243BUR-1 FAQ
1.How can I place an order for 1N5243BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5243BUR-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 1N5243BUR-1 reliable?
The price and inventory of 1N5243BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5243BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N5243BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5243BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5243BUR-1?
1N5243BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5243BUR-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 1N5243BUR-1?
For technical support, including 1N5243BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5243BUR-1 requirements.
6.How does Aetrix verify that 1N5243BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N5243BUR-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 1N5243BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N5243BUR-1?
All 1N5243BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5243BUR-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 1N5243BUR-1 part is unused and in its original packaging.
Return procedure for 1N5243BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5243BUR-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…
