My Inquiry
My Account
Microchip Technology 1N4126/TR
- Part No.:
- 1N4126/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4126/TR.pdf
- Description:
- DIODE ZENER 51V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:3,639
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N4126/TR from Microsemi is a 51 V, 500 mW axial-leaded glass Zener diode in DO-35 (DO-204AH) package, qualified to JANTXV level per MIL-PRF-19500/435, with 1% voltage tolerance, 300 Ω dynamic impedance at 250 mA, and max noise density of 1 µV/√Hz - used for precision voltage regulation in military power supplies and test equipment.
For engineers reviewing the 1N4126/TR datasheet, 1N4126/TR pinout, 1N4126/TR application, or 1N4126/TR equivalent, key selection criteria include Zener voltage accuracy (±1%), low noise performance below 1 µV/√Hz, high-reliability mil-spec qualification, thermal resistance (250 °C/W junction-to-lead), and DO-35 mechanical compatibility with through-hole PCB layouts.
Technical Context
This device operates as a reverse-biased voltage reference with metallurgically bonded construction ensuring stable breakdown characteristics across temperature (-65 to +175 °C). Its 51 V nominal Zener voltage is specified at 250 mA test current (IZT), with dynamic impedance (ZZT) of 300 Ω and temperature coefficient of +0.100 %/°C.
The 1N4126/TR exhibits minimal capacitance (typical <1.5 pF at 0 V), low leakage (<0.01 µA at 38.8 V), and inherent radiation hardness per Microsemi MicroNote 050 - enabling use in space-grade analog references and high-stability instrumentation where parametric drift must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 51.0 V ±1% at 250 mA - ensures tight regulation tolerance for reference circuits requiring <0.5 V error margin. |
| Power Dissipation | 500 mW at 25 °C, derated linearly to zero at 175 °C - supports continuous operation in sealed enclosures up to 125 °C ambient with proper lead heatsinking. |
| Dynamic Impedance | 300 Ω at IZT = 250 mA - limits output voltage variation to <75 mV under ±75 mA load transients. |
| Noise Density | 1 µV/√Hz - enables use in low-noise analog front-ends without additional filtering. |
| Temp Coefficient | +0.100 %/°C - predictable positive drift allows compensation in multi-diode reference strings. |
| Reverse Leakage | ≤0.01 µA at 38.8 V - ensures negligible current draw in standby bias networks. |
| Junction Temp Range | -65 to +175 °C - validated for extended-range aerospace and downhole electronics. |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed axial-glass package with tin-lead or RoHS-compliant matte-tin plating; cathode indicated by band; weight ≈0.2 g; body diameter 1.42–2.29 mm, length 3.56–5.08 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward conduction terminal | Connected to lower-potential node; carries forward current up to 200 mA (VF = 1.1 V). |
| Cathode (banded end) | Zener regulation terminal | Connected to higher-potential node; maintains 51 V reference when reverse-biased above breakdown threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal cycling, extending life in mission-critical avionics. |
| JANTXV qualification | Validated to MIL-PRF-19500/435 for high-reliability applications requiring 100% lot testing and traceable screening. |
| Low noise density | 1 µV/√Hz enables direct use in 16-bit DAC reference buffers without post-regulation filtering. |
| Hermetic glass seal | Prevents moisture ingress and parameter shift over 20+ years in humid or corrosive environments. |
| Radiation hardness | Inherently tolerant to total ionizing dose >100 krad(Si), supporting satellite payload voltage references. |
Applications
| Military Power Supply Reference | Aerospace Sensor Signal Conditioning |
|---|---|
Use Scenario: Stable 51 V reference in triple-redundant DC-DC converter feedback loop for F-35 flight control electronics. IC Role / Device Role / Timing Role: Zener diode providing primary voltage setpoint for error amplifier input. Use Value: ±1% tolerance and +0.100 %/°C TC enable closed-loop regulation within ±0.3 V over -55 to +125 °C operating range. | Use Scenario: Biasing and referencing of piezoresistive strain gauge bridges in rocket engine health monitoring systems. IC Role / Device Role / Timing Role: Precision shunt reference establishing common-mode voltage for instrumentation amplifiers. Use Value: 1 µV/√Hz noise density prevents degradation of 24-bit sigma-delta ADC effective resolution. |
| Test Equipment Calibration Standard | Downhole Oilfield Electronics |
Use Scenario: Primary reference in portable multimeter calibration module requiring NIST-traceable stability. IC Role / Device Role / Timing Role: Fixed-voltage reference against which DMM ADCs are trimmed during factory calibration. Use Value: JANTXV screening and hermetic seal ensure <5 ppm/year long-term drift under shelf storage conditions. | Use Scenario: Voltage clamp and regulator in high-temperature (175 °C) logging tool power management circuit. IC Role / Device Role / Timing Role: Overvoltage protection element and local reference for analog sensor front-end. Use Value: -65 to +175 °C junction rating and radiation hardness support uninterrupted operation at 150 °C ambient for 1000+ hours. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4126US | Same electrical specs but in surface-mount DO-213AA package; no axial leads. | Requires SMT reflow process; unsuitable for through-hole prototyping or high-vibration mechanical mounting. | Select when board space is constrained and automated assembly is used. |
| 1N4126-1 | Identical DO-35 package and specs, but without TR tape-and-reel packaging; supplied in bulk or ammo pack. | Not optimized for high-speed pick-and-place; requires manual loading or feeder adaptation. | Select for low-volume builds, repair spares, or evaluation where reel logistics are unnecessary. |
Compared with 1N4126US and 1N4126-1, the 1N4126/TR offers tape-and-reel delivery for automated insertion while retaining the proven DO-35 mechanical robustness and mil-spec reliability needed for defense production lines.
Availability
1N4126/TR is available at Aetrix Electronics and suitable for military power supplies, aerospace sensor conditioning, and test equipment calibration requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N4126/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 Corporation (now part of Microchip Technology) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N4126/TR belongs to Microsemi's legacy MIL-PRF-19500-qualified Zener diode family, engineered specifically for voltage reference stability under extreme temperature, radiation, and vibration conditions.
FAQ
What is the Zener voltage tolerance for 1N4126/TR?
The 1N4126/TR has a nominal Zener voltage of 51.0 V with ±1% tolerance, corresponding to the "D" suffix in Microsemi's nomenclature. This tolerance is verified at 250 mA test current and 25 °C ambient, and applies across the full operating temperature range per MIL-PRF-19500/435 screening requirements for JANTXV-grade devices.
Is 1N4126/TR RoHS compliant?
Yes, the 1N4126/TR is RoHS compliant, indicated by the "e3" suffix in its full part number (1N4126-1e3/TR). RoHS compliance applies only to commercial-grade versions; mil-spec variants (JAN/JANTX/JANTXV/JANS) retain tin-lead plating per specification requirements.
What is the maximum reverse leakage current for 1N4126/TR?
The maximum reverse leakage current (IR) for 1N4126/TR is 0.01 µA at VR = 38.8 V, per Electrical Characteristics table on page 3 of T4-LDS-0245-2. This ultra-low leakage supports high-impedance bias networks in precision analog circuits without introducing measurable error.
Can 1N4126/TR be used in surface-mount designs?
No - the 1N4126/TR uses the axial-leaded DO-35 (DO-204AH) package and is not compatible with SMT assembly. For surface-mount equivalents, consider the 1N4126US in DO-213AA package, which shares identical electrical specifications but requires reflow soldering instead of through-hole mounting.
What is the thermal resistance junction-to-lead for 1N4126/TR?
The thermal resistance junction-to-lead (RθJL) for 1N4126/TR is 250 °C/W when measured with 3/8 inch (10 mm) lead length from body, per Maximum Ratings table. This value enables accurate power derating calculations for chassis-mounted or heatsink-attached configurations in high-reliability power systems.
1N4126/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AA, DO-7, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 51 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 300 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 38.76 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-7 (DO-204AA)
1N4126/TR FAQ
1.How can I place an order for 1N4126/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4126/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 1N4126/TR reliable?
The price and inventory of 1N4126/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4126/TR is usually 5 days.
3.What payment methods are accepted for 1N4126/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4126/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4126/TR?
1N4126/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4126/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 1N4126/TR?
For technical support, including 1N4126/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4126/TR requirements.
6.How does Aetrix verify that 1N4126/TR is sourced from the original manufacturer or authorized distributors?
All 1N4126/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 1N4126/TR meets industry standards.
7.What is the process for return or replacement of 1N4126/TR?
All 1N4126/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4126/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 1N4126/TR part is unused and in its original packaging.
Return procedure for 1N4126/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4126/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
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
