My Inquiry
My Account
Microchip Technology 1N5250A/TR
- Part No.:
- 1N5250A/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5250A/TR.pdf
- Description:
- DIODE ZENER 20V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,642
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5250A/TR from Microsemi is a 20 V, ±10% tolerance, 500 mW glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 6.2 mA test current, 600 Ω dynamic impedance at IZK, and operating across –65°C to +175°C. It serves as a precision voltage reference or shunt regulator in low-power analog circuits, power supply feedback loops, and overvoltage protection.
For engineers reviewing the 1N5250A/TR datasheet, 1N5250A/TR pinout, 1N5250A/TR application, or 1N5250A/TR equivalent, this page delivers verified electrical specs, thermal derating behavior, Zener voltage temperature coefficient (+0.086 %/°C), RoHS-compliant plating options, and direct alternatives with validated parameter alignment.
Technical Context
This device operates in reverse-biased breakdown mode with a sharp knee at 6.2 mA test current, delivering stable regulation despite wide variations in input current and ambient temperature. Its 600 Ω dynamic impedance at 0.25 mA ensures predictable voltage deviation under light-load conditions.
The DO-35 glass package provides hermetic sealing, inherent radiation hardness per MicroNote 050, and ESD insensitivity (MIL-STD-750 Method 1020). Thermal resistance is 250 °C/W junction-to-lead at 10 mm lead length, enabling reliable operation up to 175 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 20 V @ 6.2 mA test current - defines regulated output voltage under standard bias condition |
| Power Dissipation | 0.5 W at 25 °C - maximum steady-state power before thermal derating begins |
| Zener Impedance | 600 Ω @ IZK = 0.25 mA - indicates voltage stability under very low current, critical for standby-mode regulation |
| Temperature Coefficient | +0.086 %/°C - quantifies VZ drift with temperature; enables accurate compensation in wide-temp designs |
| Reverse Current | 0.1 μA @ VR = 15 V - confirms low leakage below breakdown, essential for high-impedance reference nodes |
| Operating Temperature | –65 °C to +175 °C - supports aerospace, downhole, and industrial environments without derating penalties |
| Forward Voltage | ≤1.5 V @ 200 mA - ensures predictable clamping during transient forward conduction |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed glass axial-leaded package with cathode band marking; polarity must be observed-banded end is cathode and must be held positive relative to anode for Zener regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or lower-potential rail; forms return path for Zener current |
| Cathode | Regulated output node | Banded end; connected to voltage node requiring stabilization; sinks current to maintain VZ |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered DO-35 construction | Ensures mechanical and thermal interchangeability with legacy 1N52xx designs across OEMs |
| ±10% voltage tolerance (A suffix) | Meets cost-sensitive industrial applications where tighter tolerances are unnecessary |
| RoHS-compliant matte-tin plating | Enables lead-free reflow soldering at 260 °C for 10 s without degradation |
| Minimal capacitance (typ. <2 pF) | Preserves high-frequency signal integrity in RF bias networks and fast-switching references |
| Radiation-hardened structure | Validated per MicroNote 050 for use in space-qualified and nuclear instrumentation systems |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or buck-derived auxiliary supplies. IC Role / Device Role / Timing Role: Shunt reference element in TL431-type feedback loop or discrete op-amp comparator circuit. Use Value: Maintains ±1% output accuracy over line/load/temperature with no active components required. |
Use Scenario: Protecting microcontroller I/O pins from ESD or surge-induced overvoltage. IC Role / Device Role / Timing Role: Low-capacitance clamp placed between signal line and ground. Use Value: Limits transient voltage to ≤20 V with sub-μA leakage, avoiding false triggering or latch-up. |
| Voltage Reference | Current Source Bias |
Use Scenario: Providing stable bias for analog sensor front-ends or ADC reference dividers. IC Role / Device Role / Timing Role: Precision DC reference node in ratiometric measurement chains. Use Value: Delivers 20 V reference with <0.1 μA leakage and +0.086 %/°C TC for <0.5% total drift over –40°C to +85°C. |
Use Scenario: Setting constant current for LED drivers or transistor bias networks. IC Role / Device Role / Timing Role: Zener-based current source with series resistor. Use Value: Enables 1% current accuracy using only one resistor and 1N5250A/TR, eliminating need for IC regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | 12 V nominal, 1 W rating, DO-41 package, 22 Ω ZT @ 21 mA | Higher power, lower voltage; unsuitable for 20 V reference but preferred for 12 V rail clamping | Select when higher power margin or lower ZT is required at 12 V; not interchangeable with 1N5250A/TR |
| BZX55C20 | 20 V nominal, ±5% tolerance (C suffix), DO-35, 500 mW, 50 Ω ZT @ 5 mA | Tighter tolerance and lower impedance, but different tempco (+0.07 %/°C) and screening pedigree | Choose for improved regulation accuracy where MIL-spec screening is not required; verify tempco fit in high-temp designs |
Compared with 1N5250A/TR, 1N4742A offers higher power but different voltage and package, while BZX55C20 provides tighter tolerance and lower impedance at 20 V but lacks radiation hardness and military screening options-making 1N5250A/TR preferable for aerospace, defense, and high-reliability industrial use.
Availability
1N5250A/TR is available at Aetrix Electronics and suitable for power supply feedback, overvoltage clamp, and voltage reference applications requiring stable component supply, long-term obsolescence management, and traceable sourcing.
Supply support for 1N5250A/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 aerospace-grade components.
The 1N52xx series was designed for mission-critical voltage regulation in military, space, and industrial systems where long-term stability, wide temperature operation, and hermetic packaging are mandatory.
FAQ
What is the Zener voltage tolerance for 1N5250A/TR?
The "A" suffix in 1N5250A/TR specifies a nominal Zener voltage of 20 V with a tolerance of ±10%, measured at 6.2 mA test current and 25 °C ambient. This tolerance is guaranteed per JEDEC specification and applies across the full operating temperature range of –65 °C to +175 °C.
Can 1N5250A/TR be used in surface-mount designs?
No-1N5250A/TR is a through-hole DO-35 axial-leaded device and is not compatible with SMT assembly. For surface-mount equivalents, Microsemi offers the MLL5250B in DO-213AA (MELF) package; however, that part has different thermal and mechanical characteristics and requires layout revision.
What is the maximum reverse leakage current for 1N5250A/TR?
At VR = 15 V (75% of nominal VZ), the maximum reverse leakage current for 1N5250A/TR is 0.1 μA, measured at 25 °C. This ultra-low leakage supports high-impedance reference nodes and minimizes error in precision divider networks.
Does 1N5250A/TR support lead-free soldering processes?
Yes-1N5250A/TR features RoHS-compliant annealed matte-tin plating and is qualified for lead-free reflow soldering at 260 °C for up to 10 seconds, meeting IPC/JEDEC J-STD-020 requirements without performance degradation.
How does the temperature coefficient affect 1N5250A/TR in real-world operation?
The +0.086 %/°C temperature coefficient means VZ increases by approximately 17.2 mV per 10 °C rise above 25 °C. In a –40 °C to +85 °C environment, this results in ~2.15 V total shift-designers must account for this in absolute reference accuracy budgets.
1N5250A/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±10%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 14.3 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N5250A/TR FAQ
1.How can I place an order for 1N5250A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5250A/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 1N5250A/TR reliable?
The price and inventory of 1N5250A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5250A/TR is usually 5 days.
3.What payment methods are accepted for 1N5250A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5250A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5250A/TR?
1N5250A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5250A/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 1N5250A/TR?
For technical support, including 1N5250A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5250A/TR requirements.
6.How does Aetrix verify that 1N5250A/TR is sourced from the original manufacturer or authorized distributors?
All 1N5250A/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 1N5250A/TR meets industry standards.
7.What is the process for return or replacement of 1N5250A/TR?
All 1N5250A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5250A/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 1N5250A/TR part is unused and in its original packaging.
Return procedure for 1N5250A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5250A/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…
