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Microchip Technology 1N5280B
- Part No.:
- 1N5280B
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5280B.pdf
- Description:
- DIODE ZENER 190V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:3,677
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Product details
Overview
1N5280B from Microsemi is a 500 mW, 190 V ±5% tolerance glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for -65°C to +175°C operation, with 0.1 μA max reverse current at 152 V, and 2400 Ω max zener impedance at 0.25 mA test current - used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5280B datasheet, 1N5280B pinout, 1N5280B application, or 1N5280B equivalent, key selection criteria include its 190 V nominal zener voltage, ±5% tolerance (B suffix), 500 mW power rating at 25°C, DO-35 mechanical compatibility, and temperature coefficient of +0.110 %/°C - critical for high-voltage stabilization in harsh-environment designs.
Technical Context
The 1N5280B operates as a two-terminal voltage reference diode, conducting in reverse breakdown with sharp knee characteristics verified per JEDEC standards. Its zener impedance is measured at both IZT (7.5 mA) and IZK (0.25 mA), ensuring stable regulation across low- and medium-current bias conditions.
Designed for high-temperature reliability, it features hermetically sealed glass construction, tin-lead or RoHS-compliant matte-tin plating, and radiation-hardened behavior per MicroNote 050. Polarity is marked by cathode band; regulation requires cathode-positive bias relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 190 V @ 0.66 mA test current - defines precise clamping threshold for high-voltage rail monitoring |
| Tolerance | ±5% (B suffix) - ensures predictable regulation window without post-manufacture trimming |
| Power Dissipation | 500 mW at 25°C, derated linearly above 50°C lead temperature - limits thermal stress in compact layouts |
| Zener Impedance | 2400 Ω max @ IZK = 0.25 mA - indicates moderate dynamic resistance suitable for low-current references |
| Reverse Current | 0.1 μA max @ VR = 152 V - confirms low leakage below breakdown, critical for standby power integrity |
| Temp. Coefficient | +0.110 %/°C - quantifies voltage drift over -65°C to +175°C operating range for thermal design margining |
| Package | DO-35 (DO-204AH) glass axial-leaded - enables through-hole mounting with 0.2 g mass and 3/8″ lead length thermal path |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed glass axial-leaded package with cathode indicated by colored 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 | Forward conduction terminal / Zener reference ground node | Connected to system ground or lower-potential rail; reverse-biased during regulation |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to voltage rail requiring stabilization; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N52xxB series | Guarantees full six-parameter specification compliance (VZ, IR, ZZT, ZZK, αVZ, VF) per industry standard |
| Radiation-hardened construction | Inherent hardness per MicroNote 050 - supports aerospace and nuclear instrumentation applications |
| ESD-insensitive design | Qualified to MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling and assembly |
| Wide temperature operation | -65°C to +175°C storage and operating range - enables deployment in engine control, downhole, and military systems |
| Low capacitance | Typical <2 pF (per Figure 2) - preserves high-frequency signal integrity in RF bias and timing circuits |
Applications
| Industrial Power Supply Regulation | High-Voltage Reference Calibration |
|---|---|
Use Scenario: Stabilizing auxiliary bias rails in 200 V DC-DC converters for PLC I/O modules. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing fixed 190 V clamp against input transients. Use Value: Maintains ±5% output accuracy over -40°C to +85°C ambient with no active feedback loop required. |
Use Scenario: Precision voltage reference in portable multimeter front-end analog-to-digital conversion. IC Role / Device Role / Timing Role: Passive calibration standard for 200 V range scaling, traceable to JEDEC 1N5280B spec. Use Value: Enables factory-trimmed accuracy without laser adjustment, leveraging guaranteed ±5% VZ tolerance. |
| Overvoltage Protection Circuit | Military Avionics Bias Clamping |
Use Scenario: Crowbar trigger element in 190 V battery management systems detecting cell overcharge. IC Role / Device Role / Timing Role: Zener-based threshold detector initiating SCR gate firing when bus exceeds 190 V. Use Value: Delivers repeatable 190 V trip point with <0.1 μA leakage, minimizing standby current drain. |
Use Scenario: Voltage stabilization for radar receiver LNA bias in airborne electronic warfare pods. IC Role / Device Role / Timing Role: High-reliability shunt regulator maintaining stable 190 V supply under vibration and thermal cycling. Use Value: Survives -65°C to +175°C extremes and meets MIL-PRF-19500 screening when ordered with MV prefix. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5280C | ±2% tolerance (C suffix) vs. ±5% for 1N5280B; otherwise identical electrical and mechanical specs | Used where tighter initial voltage accuracy is required without changing layout or thermal design | Select 1N5280C when calibration budget allows reduced tolerance; same DO-35 footprint and derating apply |
| MMBZ5280B | Surface-mount MELF (DO-213AA) package; same 190 V ±5%, but 350 mW power rating and different thermal resistance | Preferred for automated SMT assembly; not drop-in compatible due to package and power dissipation differences | Choose MMBZ5280B only if board space constraints mandate SMT; verify thermal performance on FR4 with 1 oz Cu |
Compared with 1N5280B, the 1N5280C offers higher initial accuracy at equal cost and form factor, while MMBZ5280B trades axial-lead robustness and 500 mW rating for SMT manufacturability - neither is pin-compatible, but both serve overlapping high-voltage reference roles.
Availability
1N5280B is available at Aetrix Electronics and suitable for industrial power supplies, high-voltage test equipment, avionics bias networks, and ruggedized instrumentation requiring stable component supply across extended temperature ranges.
Supply support for 1N5280B 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 high-voltage analog components for aerospace, defense, and industrial markets.
The 1N52xxB series was designed specifically for precision voltage regulation in mission-critical systems where long-term stability, wide temperature operation, and JEDEC-compliant parametric guarantees are mandatory.
FAQ
What is the nominal zener voltage and tolerance of the 1N5280B?
The 1N5280B has a nominal zener voltage of 190 V at 0.66 mA test current, with a guaranteed tolerance of ±5% (denoted by the "B" suffix). This tolerance applies across the full operating temperature range and is validated per JEDEC registration requirements for all six electrical parameters, including VZ, IR, and ZZK.
What package type does the 1N5280B use, and what are its mechanical identifiers?
The 1N5280B uses the DO-35 (also designated DO-204AH) glass axial-leaded package. It features a hermetically sealed glass body, cathode identified by a visible band, tin-lead or RoHS-compliant matte-tin plating, and a mass of 0.2 grams. Lead length is specified at ≥3/8″ (10 mm) from the body for thermal rating compliance.
Does the 1N5280B have radiation-hardened characteristics?
Yes, the 1N5280B exhibits inherent radiation hardness per MicroNote 050, a documented characteristic of Microsemi's DO-35 Zener process. This makes it suitable for low-dose-rate environments in aerospace and nuclear instrumentation without requiring additional shielding or qualification testing.
What is the maximum reverse current specification for the 1N5280B, and at what voltage is it tested?
The 1N5280B has a maximum reverse current (IR) of 0.1 μA, tested at VR = 152 V - which corresponds to 80% of its nominal 190 V zener voltage. This low leakage ensures minimal power loss in standby mode and supports high-impedance sensing applications.
Can the 1N5280B be used in surface-mount designs?
No - the 1N5280B is exclusively a through-hole axial-leaded device in DO-35 package. For surface-mount equivalents, Microsemi offers the MMBZ5280B in DO-213AA (MELF) package, though it has a lower 350 mW power rating and different thermal characteristics; it is not a drop-in replacement.
1N5280B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 190 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 2400 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 144 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)
1N5280B FAQ
1.How can I place an order for 1N5280B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5280B 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 1N5280B reliable?
The price and inventory of 1N5280B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5280B is usually 5 days.
3.What payment methods are accepted for 1N5280B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5280B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5280B?
1N5280B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5280B 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 1N5280B?
For technical support, including 1N5280B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5280B requirements.
6.How does Aetrix verify that 1N5280B is sourced from the original manufacturer or authorized distributors?
All 1N5280B 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 1N5280B meets industry standards.
7.What is the process for return or replacement of 1N5280B?
All 1N5280B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5280B, 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 1N5280B part is unused and in its original packaging.
Return procedure for 1N5280B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5280B 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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