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Microchip Technology 1N5239BE3/TR
- Part No.:
- 1N5239BE3/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5239BE3/TR.pdf
- Description:
- DIODE ZENER 9.1V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:8,412
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Product details
Overview
1N5239BE3/TR from Microsemi is a 500 mW glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 9.1 V nominal Zener voltage at 20 mA test current, with ±5% tolerance (B suffix), 10 Ω dynamic impedance at IZT, and -65°C to +175°C operating temperature range. 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 1N5239BE3/TR datasheet, 1N5239BE3/TR pinout, 1N5239BE3/TR application, or 1N5239BE3/TR equivalent, key selection factors include its 9.1 V regulation point, 10 Ω Zener impedance, RoHS-compliant matte-tin plating, tape-and-reel packaging (TR suffix), and suitability for high-reliability industrial and aerospace environments per MIL-PRF-19500 screening options.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its design centers on low dynamic impedance (10 Ω at 20 mA), tight voltage tolerance (±5%), and radiation-hardened construction per MicroNote 050.
It features a hermetically sealed glass DO-35 package with cathode band marking, tin-lead or RoHS-compliant annealed matte-tin plating, and thermal resistance of 250 °C/W junction-to-lead at 10 mm lead length - enabling reliable operation up to 175 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 9.1 V at 20 mA - defines precise regulation point for feedback or reference circuits |
| Zener Impedance | 10 Ω at IZT - ensures minimal output voltage variation under load transients |
| Power Dissipation | 500 mW at 25 °C - sets maximum continuous power handling before derating applies |
| Operating Temperature | -65 °C to +175 °C - supports deployment in extreme industrial, automotive, and aerospace environments |
| Package | DO-35 (DO-204AH) glass axial-leaded - enables through-hole mounting with flexible lead forming and high reliability |
| Tolerance | ±5% (B suffix) - guarantees voltage accuracy without requiring post-manufacture trimming |
| RoHS Compliance | e3 suffix - confirms lead-free matte-tin plating compliant with EU Directive 2011/65/EU |
Pinout & Package
DO-35 (DO-204AH) glass axial-leaded package with cathode indicated by a single black band; leads are tinned and solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased terminal during Zener operation | Connected to lower-potential node; forms current path when cathode is held at higher voltage |
| Cathode | Zener regulation terminal (banded end) | Marked with black band; must be biased positive relative to anode to enter breakdown and regulate |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with JEDEC standard 1N5239B - ensures interoperability and qualification consistency across suppliers |
| Radiation hardness | Inherently radiation-hard per MicroNote 050 - suitable for space-grade and nuclear instrumentation applications |
| ESD immunity | Nonsensitive to ESD per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling and assembly |
| Low capacitance | Typical <2 pF - minimizes signal coupling and noise injection in high-frequency reference paths |
| Military screening options | Available with MQ/MX/MV/MSP prefixes for JAN/JANTX/JANTXV/JANS levels - meets MIL-PRF-19500 requirements |
Applications
| Industrial Power Monitoring | Avionics Reference Supply |
|---|---|
Use Scenario: Monitoring DC bus voltage in programmable logic controller (PLC) backplanes using resistive divider and ADC input. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 9.1 V reference for ADC scaling and fault threshold detection. Use Value: Enables accurate 0–10 V analog measurement across wide temperature (-40°C to +85°C) with ±5% regulation stability and no active components. | Use Scenario: Providing regulated bias voltage for op-amps and comparators in flight control sensor interfaces. IC Role / Device Role / Timing Role: Precision Zener reference source ensuring consistent gain and offset calibration across avionics subsystems. Use Value: Delivers 9.1 V reference with <10 Ω dynamic impedance and radiation hardness - critical for fail-safe sensor signal conditioning in aircraft systems. |
| Test Equipment Calibration | Telecom Line Protection |
Use Scenario: Generating traceable voltage standards in portable multimeter calibration modules. IC Role / Device Role / Timing Role: Primary voltage reference element in self-contained calibration source circuitry. Use Value: Provides ±5% tolerance and low tempco (+0.068 %/°C) for repeatable 9.1 V output over 0–50°C operating range without trimming. | Use Scenario: Clamping transient surges on 48 V telecom power feeds to protect downstream DC-DC converters. IC Role / Device Role / Timing Role: Shunt overvoltage protector limiting voltage spikes to ≤9.1 V during lightning-induced transients. Use Value: Absorbs up to 500 mW surge energy with fast response and minimal leakage (<0.1 μA at 7.3 V), preserving converter reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4739A | Same 9.1 V nominal voltage, ±5% tolerance, but 1 W power rating and DO-41 package | Higher power dissipation capability; requires larger PCB footprint and different thermal layout | Select when >500 mW continuous power or higher surge energy absorption is required |
| MMBZ5239B | Same 9.1 V/±5%, SOT-23 surface-mount package, 225 mW rating | Enables automated assembly and space-constrained designs; lower power and different thermal profile | Select for compact PCBs where reflow compatibility and volume production are priorities |
Compared with 1N4739A and MMBZ5239B, the 1N5239BE3/TR offers optimal balance of axial-lead mechanical robustness, 500 mW power handling, DO-35 reliability, and RoHS compliance - making it preferred for high-integrity through-hole designs in industrial and aerospace settings.
Availability
1N5239BE3/TR is available at Aetrix Electronics and suitable for industrial power monitoring, avionics reference supplies, and telecom line protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1N5239BE3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N52xxB series was designed specifically for precision voltage regulation in mission-critical systems where temperature stability, radiation tolerance, and long-term parametric consistency are essential.
FAQ
What is the Zener voltage tolerance of the 1N5239BE3/TR?
The 1N5239BE3/TR has a nominal Zener voltage of 9.1 V with ±5% tolerance, indicated by the "B" suffix in its part number. This means the actual measured Zener voltage at 20 mA test current falls between 8.65 V and 9.55 V across all units at 25 °C, ensuring predictable regulation performance without post-production adjustment.
Does the 1N5239BE3/TR meet RoHS requirements?
Yes, the 1N5239BE3/TR complies with RoHS Directive 2011/65/EU, confirmed by the "e3" suffix in its designation. It uses RoHS-compliant annealed matte-tin plating on its leads and meets all substance restrictions, including lead content below 1000 ppm, making it suitable for environmentally regulated commercial and industrial applications.
What is the maximum power dissipation for the 1N5239BE3/TR at 70°C ambient?
At 70°C ambient temperature, the 1N5239BE3/TR's maximum power dissipation is approximately 375 mW. This is derived from its 500 mW rating at 25°C and linear derating slope of 6.25 mW/°C above 25°C (per Figure 1 in the datasheet), resulting in 500 − (6.25 × 45) = 375 mW - critical for thermal design validation in enclosed enclosures.
Can the 1N5239BE3/TR be used in military-grade applications?
Yes, the base 1N5239BE3/TR can be upgraded to military-grade screening by adding appropriate prefixes: MQ (JAN), MX (JANTX), MV (JANTXV), or MSP (JANS), provided the "-1" suffix is also included per Microsemi's specification. These variants undergo extended environmental testing and lot traceability per MIL-PRF-19500, supporting defense and space programs.
What is the Zener impedance of the 1N5239BE3/TR and why does it matter?
The 1N5239BE3/TR exhibits 10 Ω dynamic impedance (ZZT) at its 20 mA test current. This low value ensures minimal voltage deviation under changing load conditions - for example, a 10 mA load shift causes only ~100 mV output change. Engineers rely on this spec to guarantee regulation stability in feedback loops and precision reference circuits.
1N5239BE3/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):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 7 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N5239BE3/TR FAQ
1.How can I place an order for 1N5239BE3/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5239BE3/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 1N5239BE3/TR reliable?
The price and inventory of 1N5239BE3/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5239BE3/TR is usually 5 days.
3.What payment methods are accepted for 1N5239BE3/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5239BE3/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5239BE3/TR?
1N5239BE3/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5239BE3/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 1N5239BE3/TR?
For technical support, including 1N5239BE3/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5239BE3/TR requirements.
6.How does Aetrix verify that 1N5239BE3/TR is sourced from the original manufacturer or authorized distributors?
All 1N5239BE3/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 1N5239BE3/TR meets industry standards.
7.What is the process for return or replacement of 1N5239BE3/TR?
All 1N5239BE3/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5239BE3/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 1N5239BE3/TR part is unused and in its original packaging.
Return procedure for 1N5239BE3/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5239BE3/TR Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
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