My Inquiry
My Account
Microchip Technology 1N5250BUR-1/TR
- Part No.:
- 1N5250BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5250BUR-1/TR.pdf
- Description:
- DIODE ZENER 20V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,539
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5250BUR-1/TR from Microsemi is a 20 V, 5% tolerance, 500 mW surface-mount Zener diode in DO-213AA (SOD-80/MELF) package, designed for precision voltage regulation in low-power analog circuits, reference supplies, and overvoltage protection. It delivers stable Zener voltage at 20 mA test current with 6.2 Ω dynamic impedance and ±0.086 %/°C temperature coefficient.
For engineers reviewing the 1N5250BUR-1/TR datasheet, 1N5250BUR-1/TR pinout, 1N5250BUR-1/TR application, or 1N5250BUR-1/TR equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (100 °C/W junction-to-end-cap), low leakage (<0.1 µA at 14.3 V), RoHS-compliant matte-tin plating, and MIL-PRF-19500 upscreening capability.
Technical Context
This device operates as a reverse-biased silicon Zener regulator, maintaining 20 V across its terminals within ±5% tolerance at IZT = 20 mA. Its metallurgically bonded glass construction ensures hermetic sealing and radiation hardness per MicroNote 050.
It exhibits minimal capacitance (typical ~2.5 pF at 20 V), low forward voltage (≤1.1 V @ 200 mA), and stable regulation over -65 °C to +175 °C junction temperature range. Thermal derating applies above 50 °C ambient or 125 °C end-cap temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 20 V ±5% at 20 mA - defines precise regulation point for reference and clamp circuits |
| Power Dissipation PD | 0.5 W - limits continuous power handling on FR4 PCB with recommended footprint |
| Dynamic Impedance ZZT | 6.2 Ω @ 20 mA - determines output voltage stability under load current variation |
| Temp. Coefficient αVZ | +0.086 %/°C - quantifies voltage drift with temperature, critical for precision references |
| Reverse Leakage IR | <0.1 µA @ 14.3 V - ensures negligible error current in high-impedance bias networks |
| Junction Temp. Range | -65 °C to +175 °C - supports operation in harsh industrial and aerospace environments |
| Package | DO-213AA (SOD-80/MELF) - surface-mount, hermetically sealed, RoHS-compliant end-cap plating |
Pinout & Package
DO-213AA (SOD-80/MELF) is a cylindrical metallurgically bonded glass package with two solderable end caps. Cathode is marked by a single band; polarity must be observed during placement-banded end is positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to circuit common; establishes Zener breakdown direction when cathode is biased positive |
| Cathode (banded end) | Regulated output node | Provides stable 20 V relative to anode; requires series resistor to limit current to ≤20 mA nominal |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift in humid or high-reliability environments |
| Metallurgical bond interface | Ensures robust thermal conduction from junction to end cap (RθJEC = 100 °C/W) for stable regulation |
| MIL-PRF-19500 upscreening option | Enables qualification for military/aerospace applications without redesigning board layout or schematic |
| Low capacitance (~2.5 pF) | Minimizes signal coupling and phase shift in RF bias networks and high-frequency clamp circuits |
| Radiation hardness (per MicroNote 050) | Supports operation in space-grade and nuclear instrumentation systems without shielding or derating |
Applications
| Industrial Sensor Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 20 V reference for 4–20 mA transmitter front-end op-amps and ADC drivers. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference with low tempco and minimal loading error. Use Value: Enables <±0.1% total reference error over -40 °C to +85 °C ambient due to tight 5% VZ tolerance and +0.086 %/°C αVZ. | Use Scenario: Protecting microcontroller I/O pins from transient surges exceeding 20 V in factory automation PLC modules. IC Role / Device Role / Timing Role: Shunt clamping element diverting excess energy to ground before IC damage occurs. Use Value: Responds within nanoseconds with <0.1 µA leakage below clamp threshold, preserving signal integrity during normal operation. |
| Low-Power Bias Network | Aerospace Power Monitor |
Use Scenario: Generating fixed bias points for discrete transistor amplifiers in battery-powered portable test equipment. IC Role / Device Role / Timing Role: Passive voltage-setting component in high-impedance divider networks. Use Value: Delivers stable 20 V with only 6.2 Ω dynamic impedance, minimizing voltage sag under 1–5 mA load variations. | Use Scenario: Monitoring 28 V aircraft bus voltage via resistive divider with Zener-clamped output feeding ADC input. IC Role / Device Role / Timing Role: Radiation-hardened voltage clamp ensuring ADC input stays within safe range despite TID exposure. Use Value: Maintains regulation integrity after 100 krad(Si) total ionizing dose per MicroNote 050, eliminating need for redundant clamps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5250B-1TR | Same 20 V, 5% spec, but in axial DO-35 package - no surface-mount compatibility | Requires through-hole PCB layout; unsuitable for automated SMT assembly | Select 1N5250B-1TR only if legacy through-hole design or manual prototyping is required |
| BZX55C20-TR | 20 V, 5% Zener in DO-35; higher ZZT (25 Ω) and wider tempco (±0.09 %/°C) | Lower regulation precision and greater thermal drift than 1N5250BUR-1/TR | Choose BZX55C20-TR only for cost-sensitive commercial designs where ±1% absolute accuracy is not required |
Compared with 1N5250B-1TR and BZX55C20-TR, the 1N5250BUR-1/TR offers superior thermal performance (RθJEC = 100 °C/W vs. >200 °C/W), hermetic reliability, and radiation hardness-making it the preferred choice for SMT-based industrial and aerospace voltage reference designs.
Availability
1N5250BUR-1/TR is available at Aetrix Electronics and suitable for industrial sensor references, overvoltage clamps, and low-power bias networks requiring stable component supply, consistent parametric performance, and long-term obsolescence management.
Supply support for 1N5250BUR-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 Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and aerospace-grade components.
The 1N52xxBUR-1 series was developed to deliver JEDEC-standard Zener regulation in hermetically sealed surface-mount packages for mission-critical analog subsystems demanding long-term stability and environmental resilience.
FAQ
What is the Zener voltage tolerance and test current for the 1N5250BUR-1/TR?
The 1N5250BUR-1/TR has a nominal Zener voltage of 20 V with a ±5% tolerance, measured at a test current IZT of 20 mA. This tolerance corresponds to the "B" suffix in the part nomenclature and is guaranteed across the full operating temperature range of -65 °C to +175 °C junction temperature.
Does the 1N5250BUR-1/TR support RoHS compliance?
Yes, the 1N5250BUR-1/TR is RoHS compliant (designated by the "e3" suffix in full nomenclature), with annealed matte-tin plating on both end caps. RoHS compliance applies to commercial-grade versions only; upscreened MIL-PRF-19500 variants may use tin-lead plating per specification requirements.
What is the maximum reverse leakage current for the 1N5250BUR-1/TR?
The 1N5250BUR-1/TR specifies a maximum reverse leakage current IR of 0.1 µA at VR = 14.3 V (90% of nominal VZ). This ultra-low leakage enables use in high-impedance bias networks and precision reference dividers without introducing measurable error current.
Can the 1N5250BUR-1/TR be used in radiation-intensive environments?
Yes, the 1N5250BUR-1/TR is inherently radiation hard per Microsemi MicroNote 050, validated for total ionizing dose (TID) tolerance up to 100 krad(Si). Its metallurgically bonded glass construction and silicon process ensure stable Zener voltage and leakage performance after irradiation.
What is the thermal resistance from junction to end cap for the 1N5250BUR-1/TR?
The 1N5250BUR-1/TR has a thermal resistance RθJEC of 100 °C/W from junction to end cap, measured under standard conditions on FR4 board with recommended footprint. This value enables accurate thermal modeling for power derating above 125 °C end-cap temperature.
1N5250BUR-1/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):
- 20 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 15 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
1N5250BUR-1/TR FAQ
1.How can I place an order for 1N5250BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5250BUR-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 1N5250BUR-1/TR reliable?
The price and inventory of 1N5250BUR-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 1N5250BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5250BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5250BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5250BUR-1/TR?
1N5250BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5250BUR-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 1N5250BUR-1/TR?
For technical support, including 1N5250BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5250BUR-1/TR requirements.
6.How does Aetrix verify that 1N5250BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5250BUR-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 1N5250BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5250BUR-1/TR?
All 1N5250BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5250BUR-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 1N5250BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5250BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5250BUR-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…
