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Microchip Technology 1N5225B/TR
- Part No.:
- 1N5225B/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5225B/TR.pdf
- Description:
- DIODE ZENER 3V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:5,041
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Product details
Overview
1N5225B/TR from Microsemi is a 3.0 V, ±5% tolerance, 500 mW glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 20 mA test current and 1600 Ω dynamic impedance at 0.25 mA, operating from –65°C to +175°C. 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 1N5225B/TR datasheet, 1N5225B/TR pinout, 1N5225B/TR application, or 1N5225B/TR equivalent, key selection criteria include its 3.0 V nominal Zener voltage, ±5% tolerance (B suffix), 500 mW power rating at 25°C, low temperature coefficient of –0.075 %/°C, and DO-35 hermetic glass package with cathode band marking.
Technical Context
This device operates in reverse-bias breakdown mode, delivering stable regulation across 1.0–100 μA reverse current range with minimal capacitance (<2.0 pF typical per Figure 2). Its Zener impedance is characterized at both IZT = 20 mA (ZZT = 1600 Ω) and IZK = 0.25 mA (ZZK = 50 Ω), ensuring predictable knee behavior.
The 1N5225B/TR exhibits a negative temperature coefficient (–0.075 %/°C), indicating decreasing Zener voltage with rising temperature - critical for thermal drift compensation in reference designs. It is RoHS-compliant when ordered with "e3" suffix and supports MIL-PRF-19500 screening with prefix options (e.g., MV1N5225B/TR).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.0 V @ 20 mA - defines regulated output voltage under standard test conditions |
| Zener Tolerance | ±5% (B suffix) - ensures voltage accuracy within ±0.15 V at 25°C |
| Power Dissipation | 500 mW at 25°C - sets maximum continuous DC power before thermal derating applies |
| Zener Impedance | 1600 Ω @ 20 mA - indicates voltage stability under moderate load variation |
| Temperature Coefficient | –0.075 %/°C - quantifies voltage drift per degree Celsius rise in junction temperature |
| Reverse Current | 100 μA @ 1.0 V - specifies leakage level below breakdown, critical for low-power standby operation |
| Forward Voltage | 1.5 V max @ 200 mA - defines conduction threshold in forward bias, relevant for polarity protection |
Pinout & Package
Hermetically sealed DO-35 (DO-204AH) glass axial-leaded package with cathode indicated by a single black band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to lower-potential node; reverse-biased during regulation |
| Cathode | Banded end | Connected to higher-potential node; Zener breakdown occurs here to clamp voltage |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with JEDEC 1N5225B standard for interchangeability and testing consistency |
| Hermetic glass construction | Ensures long-term reliability and moisture resistance in harsh environments |
| Nonsensitive to ESD | Withstands electrostatic discharge per MIL-STD-750 Method 1020 without parameter shift |
| Radiation-hardened | Inherently radiation tolerant per MicroNote 050 - suitable for aerospace and defense applications |
| Tape-and-reel packaging | "TR" suffix enables automated SMT placement despite axial-leaded form factor |
Applications
| Voltage Reference Circuit | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 3.0 V reference for ADCs, comparators, or op-amp biasing in battery-powered sensors. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise DC potential independent of supply variation. Use Value: Delivers ±5% accuracy and –0.075 %/°C drift control, enabling sub-1% system-level reference stability over industrial temperature range. | Use Scenario: Protecting microcontroller I/O pins from transient surges exceeding 3.3 V logic rail. IC Role / Device Role / Timing Role: Passive clamping element diverting excess current to ground when input exceeds 3.0 V + forward drop. Use Value: Responds in nanoseconds with <2.0 pF capacitance, preserving signal integrity while limiting peak voltage to ≤3.5 V at 100 mA surge. |
| Power Supply Feedback | Current Source Bias |
Use Scenario: Setting output voltage in adjustable linear regulators (e.g., LM317) via resistor divider feedback path. IC Role / Device Role / Timing Role: Precision voltage node defining regulation setpoint for error amplifier comparison. Use Value: Maintains regulation within ±0.15 V over 1–20 mA operating range, improving load regulation to ±0.5% across 0–500 mA output. | Use Scenario: Establishing constant current for LED biasing or transistor base drive in analog front-ends. IC Role / Device Role / Timing Role: Voltage-controlled current source using Zener voltage across emitter resistor. Use Value: Enables 1% current accuracy with matched resistor tolerance, leveraging tight 3.0 V reference and low ZZK = 50 Ω at 0.25 mA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4728A | 3.3 V nominal, ±5%, DO-41 package, 1.0 W rating, 10 Ω Zener impedance at 76 mA | Higher power handling but larger footprint and different thermal profile | Select when >500 mW dissipation or PCB space allows DO-41; not drop-in due to package and voltage mismatch |
| BZX55C3V0 | 3.0 V nominal, ±5%, DO-35 package, 500 mW rating, 90 Ω Zener impedance at 5 mA | Lower ZZT improves regulation under light loads but tighter production spread may affect batch consistency | Prefer for cost-sensitive industrial designs where 90 Ω vs. 1600 Ω impedance at different test currents aligns with circuit requirements |
Compared with 1N5225B/TR, 1N4728A offers higher power and lower impedance but requires layout change and shifts regulation point; BZX55C3V0 matches voltage and package but trades higher test-current impedance for better low-current regulation - choice depends on load current profile and thermal constraints.
Availability
1N5225B/TR is available at Aetrix Electronics and suitable for voltage reference circuits, overvoltage clamps, and power supply feedback networks requiring stable component supply across automotive, industrial control, and aerospace programs.
Supply support for 1N5225B/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 1N52xxB series belongs to Microsemi's legacy Zener diode product line, engineered for precision voltage regulation in mission-critical systems where long-term stability, wide temperature operation, and ESD immunity are mandatory.
FAQ
What is the nominal Zener voltage and tolerance of the 1N5225B/TR?
The 1N5225B/TR has a nominal Zener voltage of 3.0 V at 20 mA test current, with a guaranteed tolerance of ±5% indicated by the "B" suffix. This means the actual breakdown voltage falls between 2.85 V and 3.15 V at 25°C under specified test conditions, making it suitable for applications requiring moderate voltage accuracy without trimming.
What package type and marking does the 1N5225B/TR use?
The 1N5225B/TR uses the DO-35 (DO-204AH) hermetically sealed glass axial-leaded package. The cathode is marked by a single black band on the glass body; the anode is the unmarked end. The full part number "1N5225B" is laser-marked or printed on the device body per JEDEC standards.
How does the temperature coefficient affect performance of the 1N5225B/TR?
The 1N5225B/TR has a temperature coefficient of –0.075 %/°C, meaning its Zener voltage decreases by approximately 2.25 mV per °C rise in junction temperature. This negative drift must be accounted for in high-precision references; however, it enables predictable compensation when paired with positive-drift components in composite references.
Is the 1N5225B/TR RoHS compliant?
Yes - the 1N5225B/TR is RoHS compliant when ordered with the "e3" suffix (e.g., 1N5225B-e3/TR). Standard versions use tin-lead plating; RoHS-compliant units feature annealed matte-tin plating per MIL-STD-750 Method 2026, verified by Microsemi's compliance documentation.
What is the maximum power dissipation and derating behavior of the 1N5225B/TR?
The 1N5225B/TR is rated for 500 mW at 25°C ambient or lead temperature (TL < 50°C at 3/8″ from body). Power must be linearly derated above 25°C at 4.0 mW/°C (250 °C/W thermal resistance junction-to-lead), reaching zero dissipation at 150°C - consistent with Figure 1 in the official Microsemi datasheet.
1N5225B/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):
- 3 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 29 Ohms
- Current - Reverse Leakage @ Vr:
- 50 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N5225B/TR FAQ
1.How can I place an order for 1N5225B/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5225B/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 1N5225B/TR reliable?
The price and inventory of 1N5225B/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5225B/TR is usually 5 days.
3.What payment methods are accepted for 1N5225B/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5225B/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5225B/TR?
1N5225B/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5225B/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 1N5225B/TR?
For technical support, including 1N5225B/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5225B/TR requirements.
6.How does Aetrix verify that 1N5225B/TR is sourced from the original manufacturer or authorized distributors?
All 1N5225B/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 1N5225B/TR meets industry standards.
7.What is the process for return or replacement of 1N5225B/TR?
All 1N5225B/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5225B/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 1N5225B/TR part is unused and in its original packaging.
Return procedure for 1N5225B/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5225B/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
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