My Inquiry
My Account
Microchip Technology 1N5999UR/TR
- Part No.:
- 1N5999UR/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5999UR/TR.pdf
- Description:
- DIODE ZENER 9.1V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,718
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5999UR/TR from Microsemi is a surface-mount 500 mW Zener diode with nominal Zener voltage of 9.1 V, ±5% tolerance (B-suffix), 5 mA test current, and 600 Ω dynamic impedance at IZT. It regulates voltage across wide operating current and temperature ranges (-65°C to +175°C) in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N5999UR/TR datasheet, 1N5999UR/TR pinout, 1N5999UR/TR application, or 1N5999UR/TR equivalent, key selection factors include its DO-213AA MELF package, low 0.04 g weight, RoHS-compliant matte-tin plating, and verified 9.1 V regulation under 5 mA test conditions per MIL-PRF-19500 screening standards.
Technical Context
This device operates as a reverse-biased voltage reference, maintaining stable output voltage across varying load currents and temperatures. Its breakdown region exhibits 600 Ω dynamic impedance at 5 mA and 0.1 µA reverse leakage at 7.0 V, with a positive temperature coefficient of +0.061 %/°C.
The 1N5999UR/TR uses hermetically sealed glass construction with metallurgical end-cap bonds for high reliability. It is rated for 0.5 W dissipation at 25°C ambient, derating linearly above 25°C with RθJA = 300 °C/W on FR4 board, and supports soldering at 260°C for 10 seconds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 9.1 V ±5% at 5 mA - defines precise regulation point for feedback loops and reference rails |
| Power Dissipation PD | 0.5 W at 25°C ambient - sets maximum continuous power handling on standard FR4 PCB |
| Dynamic Impedance ZZT | 600 Ω at IZT = 5 mA - determines output voltage stability under load transients |
| Reverse Leakage IR | 0.1 µA at 7.0 V - ensures minimal quiescent current in standby or precision bias networks |
| Junction Temperature Range | -65°C to +175°C - enables operation in harsh industrial, aerospace, and automotive environments |
| Package Type | DO-213AA (SOD80/MLL34) MELF - provides robust thermal performance and high-reliability hermetic sealing |
Pinout & Package
DO-213AA (MELF) glass package with two metallized end caps; cathode indicated by single band. No discrete pins-device functions as a two-terminal bilateral component with polarity-dependent conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node in reverse bias | Connected to higher potential during Zener operation; defines voltage reference polarity |
| Anode (unbanded end) | Reference ground or return path | Serves as current sink terminal; must be held at lower potential than cathode for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetically sealed glass construction | Prevents moisture ingress and long-term parameter drift in humid or corrosive environments |
| Metallurgically bonded end caps | Ensures low thermal resistance (RθJL = 150 °C/W) and mechanical robustness under thermal cycling |
| Non-sensitive to ESD | Withstands >8 kV HBM per MIL-STD-750 Method 1020 without parameter shift or failure |
| Inherent radiation hardness | Qualified per MicroNote 050 for TID tolerance up to 100 krad(Si), suitable for space-grade applications |
Applications
| Voltage Reference for SMPS Feedback | Overvoltage Clamp in Industrial I/O |
|---|---|
Use Scenario: Provides stable 9.1 V reference in optocoupler-based feedback loop of isolated DC-DC converters. IC Role / Device Role / Timing Role: Zener voltage reference establishing error amplifier threshold and output regulation setpoint. Use Value: Maintains ±5% output accuracy across -40°C to +85°C ambient with <600 Ω dynamic impedance limiting load-induced ripple. | Use Scenario: Clamps transient surges on 24 V PLC analog input channels exposed to field wiring faults. IC Role / Device Role / Timing Role: Two-terminal shunt protector diverting excess energy to ground before downstream ADC damage. Use Value: Absorbs 0.5 W pulses without degradation; 0.1 µA leakage avoids signal offset in 12-bit measurement systems. |
| Low-Power Sensor Bias Supply | Aerospace Power Monitor Reference |
Use Scenario: Generates clean 9.1 V bias for MEMS pressure sensor excitation in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Precision shunt regulator supplying constant voltage to sensor bridge circuitry. Use Value: Delivers stable regulation at 100 µA–5 mA range; +0.061 %/°C tempco minimizes calibration drift over operating temperature. | Use Scenario: Serves as primary voltage reference in radiation-hardened power telemetry module aboard LEO satellites. IC Role / Device Role / Timing Role: Radiation-tolerant Zener reference enabling accurate bus voltage monitoring under TID exposure. Use Value: Validated per MicroNote 050 to retain 9.1 V regulation after 100 krad(Si); DO-213AA hermeticity prevents parametric shift in vacuum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C9V1 | Same 9.1 V ±5%, but DO-35 axial package; 650 Ω ZZT; 200 mW rating | Limited to lower-power, non-SMT designs; unsuitable for automated assembly or high-density layouts | Select when legacy through-hole assembly or manual prototyping is required |
| MMBZ5240BS | SOT-23 package; 9.1 V ±5%; 0.25 W rating; 100 Ω ZZT at 20 mA | Lower power and impedance, but not MIL-PRF-19500 screened; no radiation hardness documentation | Select for cost-sensitive consumer electronics where screening and radiation tolerance are unnecessary |
Compared with BZX55C9V1 and MMBZ5240BS, the 1N5999UR/TR offers superior power handling (0.5 W), verified military-grade screening, and documented radiation hardness-making it the only choice for high-reliability industrial, aerospace, and defense applications requiring DO-213AA form factor.
Availability
1N5999UR/TR is available at Aetrix Electronics and suitable for voltage reference design, overvoltage protection circuits, and low-power sensor biasing requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N5999UR/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) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and aerospace-grade components.
The 1N5999UR/TR belongs to Microsemi's legacy 1N5985BUR–1N6031BUR series of surface-mount Zener regulators, designed specifically for mission-critical applications demanding MIL-PRF-19500 compliance, hermetic packaging, and proven performance across extreme thermal and radiation environments.
FAQ
What is the Zener voltage tolerance and test current for the 1N5999UR/TR?
The 1N5999UR/TR has a nominal Zener voltage of 9.1 V with ±5% tolerance (B-suffix) and is specified at a test current IZT of 5 mA. This tolerance and test condition are confirmed in the Electrical Characteristics table on page 3 of Microsemi's T4-LDS-0228-1 datasheet, where VZ = 9.1 V, IZT = 5 mA, and ZZT = 600 Ω.
Is the 1N5999UR/TR RoHS compliant?
Yes, the 1N5999UR/TR is RoHS compliant (e3 suffix), with matte-tin plating on its DO-213AA end caps. Per the "Part Nomenclature" section on page 2 of the datasheet, the "e3" designation confirms RoHS compliance, and this applies to commercial-grade versions only-consistent with the TR tape-and-reel packaging format.
What is the maximum power dissipation and thermal derating behavior of the 1N5999UR/TR?
The 1N5999UR/TR is rated for 0.5 W power dissipation at 25°C ambient temperature when mounted on an FR4 PCB with 1 oz copper. Derating begins linearly above 25°C at a rate defined by RθJA = 300 °C/W, reaching zero dissipation at approximately 175°C ambient-matching its maximum junction temperature rating per the Maximum Ratings table on page 1.
Does the 1N5999UR/TR have documented radiation hardness?
Yes, the 1N5999UR/TR is inherently radiation hard per Microsemi MicroNote 050, cited in the Applications/Benefits section on page 1. This documentation confirms total ionizing dose (TID) tolerance up to 100 krad(Si), making it suitable for space and nuclear instrumentation applications where radiation-induced parameter shift must be avoided.
What does the "TR" suffix indicate in the 1N5999UR/TR part number?
The "TR" suffix in 1N5999UR/TR denotes tape-and-reel packaging per EIA-481-B standard using 12 mm carrier tape. As stated on page 2 of the datasheet, this option is standard for automated SMT placement and requires consultation with the factory for minimum order quantities-distinct from bulk or ammo-pack variants.
1N5999UR/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- -
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- 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
1N5999UR/TR FAQ
1.How can I place an order for 1N5999UR/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5999UR/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 1N5999UR/TR reliable?
The price and inventory of 1N5999UR/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5999UR/TR is usually 5 days.
3.What payment methods are accepted for 1N5999UR/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5999UR/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5999UR/TR?
1N5999UR/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5999UR/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 1N5999UR/TR?
For technical support, including 1N5999UR/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5999UR/TR requirements.
6.How does Aetrix verify that 1N5999UR/TR is sourced from the original manufacturer or authorized distributors?
All 1N5999UR/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 1N5999UR/TR meets industry standards.
7.What is the process for return or replacement of 1N5999UR/TR?
All 1N5999UR/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5999UR/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 1N5999UR/TR part is unused and in its original packaging.
Return procedure for 1N5999UR/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5999UR/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…
