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Microchip Technology 1N5260B/TR
- Part No.:
- 1N5260B/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5260B/TR.pdf
- Description:
- DIODE ZENER 43V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:3,754
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Product details
Overview
1N5260B/TR from Microsemi is a 500 mW, 43 V ±5% glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for operation from –65 °C to +175 °C, with 90 Ω dynamic impedance at 0.25 mA and 0.1 μA max reverse leakage at 34.4 V, used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5260B/TR datasheet, 1N5260B/TR pinout, 1N5260B/TR application, or 1N5260B/TR equivalent, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (310 °C/W on FR4), low temperature coefficient (+0.095 %/°C), and tape-and-reel packaging for automated assembly.
Technical Context
This device operates as a two-terminal voltage regulator in reverse-biased mode, with cathode band marking polarity and stable regulation across 0.25–49 mA test current range. Its DO-35 glass package provides hermetic sealing and inherent radiation hardness per MicroNote 050.
Electrical behavior is defined by sharp breakdown knee (verified via dual-point ZZK measurement), minimal capacitance (<1.5 pF typical at 1 MHz), and ESD insensitivity per MIL-STD-750 Method 1020 - enabling reliable use in high-reliability analog monitoring circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 43 V ±5% at 3.0 mA - sets precise clamping threshold for 36–47 V supply rails |
| Power Dissipation | 500 mW at 25 °C, derated linearly to 0 W at 175 °C - defines thermal design margin on PCB |
| Zener Impedance | 90 Ω at IZK = 0.25 mA - ensures stable regulation under light-load conditions |
| Reverse Leakage | 0.1 μA max at 34.4 V - guarantees low standby current in battery-backed circuits |
| Temp. Coefficient | +0.095 %/°C - enables predictable drift compensation in wide-temperature environments |
| Operating Temp. | –65 °C to +175 °C - supports aerospace, downhole, and military-grade applications |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed glass axial-leaded package with tin-lead or RoHS-compliant matte-tin plating; cathode identified by single black band; weight 0.2 g; lead length ≥10 mm for thermal rating compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to circuit ground or lower-potential node during regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Banded end; connected to unregulated input to deliver stable 43 V output |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered DO-35 package | Industry-standard footprint compatible with legacy axial-lead assembly lines |
| ±5% voltage tolerance (B suffix) | Meets tight regulation requirements without post-calibration in mid-range power supplies |
| Inherent radiation hardness | Validated per MicroNote 050 - suitable for space-qualified and nuclear instrumentation designs |
| Nonsensitive to ESD | Passes MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling |
Applications
| Industrial Power Monitoring | Avionics Voltage Reference |
|---|---|
Use Scenario: Monitoring 48 V DC bus in programmable logic controllers with analog-to-digital conversion. IC Role / Device Role / Timing Role: Zener diode providing stable 43 V reference for ADC input scaling and overvoltage fault detection. Use Value: Enables accurate voltage measurement within ±0.5% error across –40 °C to +85 °C ambient due to low tempco and tight tolerance. | Use Scenario: Regulating bias voltage for op-amps in flight control sensor signal conditioning modules. IC Role / Device Role / Timing Role: Two-terminal shunt regulator establishing precision reference for rail-to-rail amplifiers. Use Value: Maintains regulation stability under vibration and thermal cycling thanks to hermetic DO-35 glass construction. |
| Military Communications PSU | Downhole Oilfield Instrumentation |
Use Scenario: Clamping transient surges on 28 V aircraft power distribution networks. IC Role / Device Role / Timing Role: Overvoltage protection element absorbing energy during load dump events. Use Value: Withstands 175 °C junction temperature and delivers repeatable 43 V clamping with <90 Ω dynamic impedance. | Use Scenario: Providing reference voltage for pressure transducer excitation in geothermal wellhead electronics. IC Role / Device Role / Timing Role: High-temperature-stable Zener reference source in sealed, oil-filled housings. Use Value: Operates continuously at 150 °C ambient with <0.1 μA leakage - minimizing self-heating and drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4749A | 500 mW, 43 V ±5%, DO-41 package; higher thermal resistance (500 °C/W junction-to-ambient) | Larger footprint; less suitable for high-density layouts or extreme thermal environments | Select when DO-41 mounting is already standardized and board-level thermal management is robust |
| MMBZ5260B | 350 mW, 43 V ±5%, SOT-23 surface-mount; 100 Ω ZZT, –55 °C to +150 °C rating | Not interchangeable in axial-lead designs; requires rework of PCB layout and assembly process | Choose for space-constrained consumer or telecom boards where automated pick-and-place is required |
Compared with 1N4749A and MMBZ5260B, the 1N5260B/TR offers superior thermal performance on FR4 (310 °C/W), guaranteed radiation hardness, and tape-and-reel compatibility for high-volume production - making it optimal for mission-critical industrial and defense systems where reliability outweighs footprint savings.
Availability
1N5260B/TR is available at Aetrix Electronics and suitable for industrial power monitoring, avionics voltage reference, and military communications PSU requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N5260B/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 analog, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N52xxB series belongs to Microsemi's legacy DO-35 Zener diode product line, engineered for precision voltage regulation in harsh-environment applications demanding extended temperature range, hermetic sealing, and proven field reliability.
FAQ
What is the Zener voltage tolerance of the 1N5260B/TR?
The 1N5260B/TR has a nominal Zener voltage of 43 V with a tolerance of ±5%, as indicated by the "B" suffix per JEDEC standard. This tolerance is guaranteed across the full operating temperature range (–65 °C to +175 °C) and verified at 3.0 mA test current. The 1N5260B/TR meets this specification without requiring binning or post-manufacture screening.
Does the 1N5260B/TR require heatsinking in standard PCB layouts?
No, the 1N5260B/TR does not require external heatsinking when operated within its 500 mW power limit and mounted on FR4 with 4 mm² copper pads and 1 mm track width, as specified in the datasheet. Its thermal resistance is 310 °C/W junction-to-ambient under those conditions, allowing safe operation up to 85 °C ambient at full power - consistent with typical industrial PCB thermal profiles.
Is the 1N5260B/TR RoHS compliant?
Yes, the 1N5260B/TR is RoHS compliant when ordered with the "e3" suffix (e.g., 1N5260B-e3/TR). The base part number 1N5260B/TR uses standard tin-lead plating; however, RoHS-compliant matte-tin plating is available per MIL-STD-750 Method 2026 and is explicitly supported for this variant in Microsemi's documentation.
What is the maximum reverse leakage current for the 1N5260B/TR?
The 1N5260B/TR has a maximum reverse leakage current of 0.1 μA at 34.4 V (80% of nominal Zener voltage), measured at 25 °C. This value remains stable across temperature and is critical for low-power standby circuits - such as battery-backed sensors - where microamp-level leakage could impact operational lifetime.
Can the 1N5260B/TR be used in place of the 1N5260 (no suffix)?
No - the 1N5260B/TR and 1N5260 (non-suffixed) are not functionally interchangeable. The "B" suffix denotes ±5% voltage tolerance and guaranteed limits on all six electrical parameters, whereas the unsuffixed 1N5260 only guarantees VZ, IR, and VF per JEDEC registration. Using the unsuffixed version risks out-of-spec voltage regulation and unpredictable Zener impedance in production systems.
1N5260B/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):
- 43 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 93 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 33 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)
1N5260B/TR FAQ
1.How can I place an order for 1N5260B/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5260B/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 1N5260B/TR reliable?
The price and inventory of 1N5260B/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5260B/TR is usually 5 days.
3.What payment methods are accepted for 1N5260B/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5260B/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5260B/TR?
1N5260B/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5260B/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 1N5260B/TR?
For technical support, including 1N5260B/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5260B/TR requirements.
6.How does Aetrix verify that 1N5260B/TR is sourced from the original manufacturer or authorized distributors?
All 1N5260B/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 1N5260B/TR meets industry standards.
7.What is the process for return or replacement of 1N5260B/TR?
All 1N5260B/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5260B/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 1N5260B/TR part is unused and in its original packaging.
Return procedure for 1N5260B/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5260B/TR Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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