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Microchip Technology 1N5259B/TR
- Part No.:
- 1N5259B/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5259B/TR.pdf
- Description:
- DIODE ZENER 39V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,987
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Product details
Overview
1N5259B/TR from Microsemi is a 39 V, ±5% tolerance, 500 mW glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 3.2 mA test current and 80 Ω dynamic impedance at IZK = 0.25 mA, used for precision voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the 1N5259B/TR datasheet, 1N5259B/TR pinout, 1N5259B/TR application, or 1N5259B/TR equivalent, this page delivers verified electrical specs, thermal derating behavior, temperature coefficient (+0.094 %/°C), RoHS-compliant plating options, and tape-and-reel packaging details per EIA-296.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable DC voltage across its terminals under varying load and temperature conditions. It features a sharp knee in the breakdown curve validated by dual-point Zener impedance measurement and exhibits inherent radiation hardness per MicroNote 050.
Designed for operation with cathode band positive relative to anode, it delivers regulated output with minimal capacitance (typ. <2 pF at VR = 0 V), low forward voltage (≤1.5 V @ 200 mA), and ESD insensitivity per MIL-STD-750 Method 1020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 39 V @ IZT = 3.2 mA - defines regulation setpoint for biasing and reference applications |
| Zener Tolerance | ±5% (B suffix) - ensures predictable voltage window without post-selection |
| Power Dissipation | 500 mW at 25°C - supports continuous operation in compact PCB layouts with 10 mm lead length |
| Zener Impedance | 80 Ω @ IZK = 0.25 mA - indicates low AC impedance for stable regulation under light-load transients |
| Temp. Coefficient | +0.094 %/°C - enables predictable drift compensation in industrial temperature ranges |
| Reverse Leakage | 0.1 μA @ VR = 31.2 V - ensures negligible standby current in battery-powered circuits |
| Operating Temp. | −65°C to +175°C - suitable for aerospace, downhole, and high-reliability embedded systems |
Pinout & Package
Hermetically sealed DO-35 (DO-204AH) glass axial-leaded package with cathode indicated by color band; leads are tin-lead or RoHS-compliant matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; reverse-biased operation requires cathode at higher potential |
| Cathode | Regulated output node | Banded end; supplies stable 39 V when reverse current ≥3.2 mA flows through external series resistor |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered DO-35 construction | Ensures mechanical and thermal compatibility with legacy axial-leaded assembly processes |
| RoHS-compliant "e3" option | Enables compliance with environmental directives without redesign or requalification |
| Internal bond option ("-1" suffix) | Improves mechanical robustness for high-vibration environments like avionics and motor control |
| Radiation-hardened design | Validated per MicroNote 050 for total ionizing dose (TID) resilience in space-grade applications |
| MIL-PRF-19500 screening variants | Supports JAN/JANTXV-level qualification when prefixed with MQ/MV for defense and aerospace programs |
Applications
| Low-Power Voltage Reference | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Providing stable 39 V reference for ADC biasing and op-amp feedback networks in sensor signal conditioning modules. IC Role / Device Role / Timing Role: Discrete Zener voltage reference element establishing precise DC operating point. Use Value: ±5% tolerance and +0.094 %/°C TC enable <±2% total drift over −40°C to +85°C, eliminating need for trimming. | Use Scenario: Clamping transient surges on 36 V supply rails in automotive body control modules. IC Role / Device Role / Timing Role: Standby shunt regulator that conducts only during overvoltage events above 39 V. Use Value: 500 mW power rating and 80 Ω Zener impedance ensure fast response and minimal clamping overshoot during 100 ns spikes. |
| Industrial Sensor Excitation | Programmable Current Source Bias |
Use Scenario: Supplying constant excitation voltage to 350 Ω strain gauge bridges in factory-floor load cells. IC Role / Device Role / Timing Role: Precision voltage source maintaining bridge excitation despite line voltage fluctuations. Use Value: Low 0.1 μA leakage at 31.2 V ensures <1 μW standby power loss, critical for energy-constrained wired sensors. | Use Scenario: Setting reference voltage for LM334-based programmable current sources in LED driver calibration fixtures. IC Role / Device Role / Timing Role: Stable Zener node defining current-setting resistor voltage drop. Use Value: Sharp breakdown knee and dual-point impedance validation guarantee repeatable current setting within ±0.5% across production lots. |
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 39 V nominal, ±5% tolerance, but DO-41 package (larger, 1 W rating); higher thermal resistance (125 °C/W vs. 250 °C/W) | Preferred where higher power margin or through-hole board space allows larger footprint | Select 1N4739A if system requires >500 mW surge handling or legacy DO-41 tooling compatibility |
| MMBZ5259B | SOT-23 surface-mount package; same 39 V/±5% spec but lower 200 mW rating and different thermal profile | Used in space-constrained consumer electronics where automated SMT placement is mandatory | Choose MMBZ5259B only when board area is constrained and power demand stays below 200 mW |
Compared with 1N4739A and MMBZ5259B, the 1N5259B/TR offers optimal balance of axial-leaded reliability, 500 mW continuous dissipation, JEDEC-standard DO-35 form factor, and tape-and-reel readiness for manual or semi-automated assembly-making it ideal for industrial instrumentation and aerospace subsystems requiring proven long-term stability.
Availability
1N5259B/TR is available at Aetrix Electronics and suitable for low-power voltage reference, overvoltage clamp protection, and industrial sensor excitation applications requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for 1N5259B/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 mission-critical systems where long-term stability, wide temperature operation, and MIL-spec screening options are essential.
FAQ
What is the Zener voltage tolerance for 1N5259B/TR?
The "B" suffix in 1N5259B/TR specifies a ±5% tolerance on the nominal 39 V Zener voltage, meaning the actual measured VZ at IZT = 3.2 mA falls between 37.05 V and 40.95 V. This tolerance is guaranteed per JEDEC registration and applies across the full operating temperature range of −65°C to +175°C, with no additional binning required.
Does 1N5259B/TR support RoHS compliance?
Yes, the 1N5259B/TR is RoHS compliant when ordered with the "e3" suffix (e.g., 1N5259B-e3/TR). The device uses annealed matte-tin plating per MIL-STD-750 Method 2026, and the "e3" designation confirms lead-free finish and full compliance with EU Directive 2011/65/EU. Standard versions without "e3" use tin-lead plating.
What is the maximum reverse leakage current for 1N5259B/TR?
The maximum reverse leakage current for 1N5259B/TR is 0.1 μA when tested at VR = 31.2 V (80% of nominal VZ), per the Electrical Characteristics table on page 2 of the Microsemi datasheet. This ultra-low leakage ensures minimal power loss in always-on reference circuits and supports battery life in portable instrumentation using the 1N5259B/TR.
Can 1N5259B/TR be used in high-reliability aerospace applications?
Yes, the 1N5259B/TR can be screened to MIL-PRF-19500 levels (JAN, JANTXV, JANS) by adding appropriate prefixes (e.g., MV1N5259B/TR for JANTXV), and its inherent radiation hardness per MicroNote 050 makes it suitable for low-earth orbit and avionics applications. Full qualification data and lot traceability are available upon request for 1N5259B/TR orders.
What does the "TR" suffix indicate in 1N5259B/TR?
The "TR" suffix in 1N5259B/TR denotes tape-and-reel packaging per EIA-296 standard, enabling automated pick-and-place assembly. Each reel contains standard quantities (typically 2,000 or 5,000 units), with carrier tape designed for axial-leaded DO-35 components. This format ensures consistent feeding, reduces handling damage, and supports high-volume manufacturing of boards using the 1N5259B/TR.
1N5259B/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):
- 39 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 30 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)
1N5259B/TR FAQ
1.How can I place an order for 1N5259B/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5259B/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 1N5259B/TR reliable?
The price and inventory of 1N5259B/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5259B/TR is usually 5 days.
3.What payment methods are accepted for 1N5259B/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5259B/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5259B/TR?
1N5259B/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5259B/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 1N5259B/TR?
For technical support, including 1N5259B/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5259B/TR requirements.
6.How does Aetrix verify that 1N5259B/TR is sourced from the original manufacturer or authorized distributors?
All 1N5259B/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 1N5259B/TR meets industry standards.
7.What is the process for return or replacement of 1N5259B/TR?
All 1N5259B/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5259B/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 1N5259B/TR part is unused and in its original packaging.
Return procedure for 1N5259B/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5259B/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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