My Inquiry
My Account
Microchip Technology CDLL4129
- Part No.:
- CDLL4129
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF
- Datasheet:
-
CDLL4129.pdf
- Description:
- DIODE ZENER 62V 500MW DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,852
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CDLL4129 from Microsemi is a hermetically sealed, surface-mount silicon Zener diode in DO-213AA (MELF/LL34) package, rated for 62 V nominal Zener voltage at 250 µA test current, 500 Ω maximum Zener impedance, and 6.1 mA maximum Zener current, used for precision voltage regulation in aerospace and industrial power supply reference circuits.
For engineers reviewing the CDLL4129 datasheet, CDLL4129 pinout, CDLL4129 application, or CDLL4129 equivalent, key selection criteria include its ±5% Zener tolerance, 100 °C/W thermal resistance at L = 0 inch, -65°C to +175°C junction temperature range, low-leakage operation (<0.01 µA at 47.1 V), and MIL-PRF-19500/435 qualification for high-reliability environments.
Technical Context
The CDLL4129 operates as a two-terminal voltage reference device with metallurgically bonded construction and axial coefficient of expansion (~+6 ppm/°C) matched for stable mounting on compatible substrates. It delivers regulated output under reverse-biased conditions with specified Zener impedance measured using 25 µA AC superimposed on 250 µA DC test current.
Its hermetic glass package (DO-213AA) ensures long-term stability and moisture resistance, while thermal derating begins at +125°C ambient (10 mW/°C), supporting operation up to +175°C junction temperature without external heatsinking in low-power applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 62 V ±5% at 250 µA - defines stable reference point for feedback loops in regulated power supplies |
| Zener Impedance | 500 Ω max at 250 µA - limits output voltage variation under load transients |
| Reverse Leakage | <0.01 µA at 47.1 V - ensures minimal error current in high-impedance reference networks |
| Power Dissipation | 500 mW @ TEC = +125°C - sets maximum continuous power handling before thermal derating applies |
| Junction Temp Range | -65°C to +175°C - enables deployment in extreme-environment avionics and downhole electronics |
| Package | DO-213AA (MELF/LL34) - provides hermetic sealing and superior thermal performance vs. plastic SMD packages |
Pinout & Package
CDLL4129 is a two-terminal axial device in DO-213AA (MELF) glass package with cathode band marking; no PCB footprint pins - terminals are end-cap contacts requiring symmetric soldering to matching-expansion substrates.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit common; polarity must be observed to avoid forward conduction during regulation |
| Cathode | Reverse-biased Zener terminal / Output reference node | Banded end; carries regulated voltage referenced to anode; requires stable thermal path per COE matching guidance |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 Qualified | Meets military screening requirements for reliability, burn-in, and environmental stress testing |
| Hermetic Glass Construction | Prevents moisture ingress and parameter drift over decades in sealed systems |
| Low Test Current Operation | Stable regulation at 250 µA enables ultra-low-power biasing in battery-backed references |
| Matched Thermal Expansion | +6 ppm/°C COE allows direct mounting on alumina or Kovar substrates without mechanical stress failure |
Applications
| Aerospace Power Monitoring | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Voltage reference in radiation-hardened DC-DC converter feedback network for satellite bus regulation. IC Role / Device Role / Timing Role: Zener reference diode providing stable 62 V setpoint for error amplifier comparison. Use Value: ±5% tolerance and -65°C to +175°C operation ensure consistent regulation across orbital thermal cycles. | Use Scenario: Precision bias source for high-temperature piezoresistive pressure transducer bridges. IC Role / Device Role / Timing Role: Two-terminal shunt reference establishing excitation voltage independent of supply ripple. Use Value: 500 Ω Zener impedance minimizes bridge voltage shift under varying sensor loading conditions. |
| Downhole Oilfield Electronics | Military Grade Test Equipment |
Use Scenario: Reference element in high-temperature logging tool power management subsystem operating at 150°C ambient. IC Role / Device Role / Timing Role: Hermetically sealed Zener maintaining regulation where plastic-packaged alternatives fail. Use Value: DO-213AA package and 100 °C/W thermal resistance enable stable 62 V reference without forced cooling. | Use Scenario: Calibration standard in portable multimeter reference divider chain requiring traceable voltage accuracy. IC Role / Device Role / Timing Role: Primary shunt reference defining measurement range endpoints in autoranging architecture. Use Value: MIL-PRF-19500/435 qualification ensures long-term stability and lot-to-lot consistency for metrology use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4129UR-1 | Same Zener voltage (62 V), identical DO-213AA package, but qualified to JANTXV level per MIL-PRF-19500/435 | Higher screening grade supports mission-critical flight hardware where CDLL4129 may be limited to ground support equipment | Select 1N4129UR-1 when full JANTXV screening and extended lot traceability are required |
| BZX84-C62 | 62 V Zener, SOT-23 package, ±5% tolerance, but plastic encapsulation and 250 mW rating - not hermetic or high-temp rated | Suitable only for commercial-grade, non-military applications below +150°C ambient | Choose BZX84-C62 only for cost-sensitive, non-hermetic, low-reliability consumer designs |
Compared with CDLL4129, 1N4129UR-1 offers higher reliability assurance via JANTXV screening while sharing identical electrical specs and package; BZX84-C62 trades hermeticity and temperature capability for compact size and lower cost in benign environments.
Availability
CDLL4129 is available at Aetrix Electronics and suitable for aerospace power monitoring, industrial sensor signal conditioning, and downhole oilfield electronics requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for CDLL4129 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 CDLL4129 belongs to Microsemi's legacy MIL-qualified Zener diode family designed specifically for precision voltage reference applications in harsh-environment systems where hermeticity, wide temperature operation, and long-term stability are mandatory.
FAQ
What is the Zener voltage tolerance for CDLL4129?
The CDLL4129 has a nominal Zener voltage of 62 V with a tolerance of ±5%, measured at 250 µA test current and 25°C ambient temperature. This tolerance is defined per Note 1 in the official Microsemi specification sheet and applies to all CDLL4129 units unless marked with a 'C' (±2%) or 'D' (±1%) suffix - which CDLL4129 does not carry.
Is CDLL4129 hermetically sealed and what package does it use?
Yes, CDLL4129 is hermetically sealed in a DO-213AA glass case - also known as MELF or LL34 - with metallurgically bonded construction. This package provides moisture resistance and long-term parametric stability, distinguishing it from plastic-packaged Zener diodes like the BZX84 series.
What is the maximum reverse leakage current for CDLL4129 and at what voltage is it specified?
The maximum reverse leakage current for CDLL4129 is 0.01 µA, specified at a reverse voltage of 47.1 V (76% of nominal Zener voltage). This low leakage supports high-impedance reference applications where error currents must be minimized, such as in precision sensor bias networks.
Does CDLL4129 meet any military specifications?
Yes, CDLL4129 complies with MIL-PRF-19500/435 for passive semiconductor devices and is qualified for JAN, JANTX, JANTXV, and JANS levels. Its qualification covers environmental stress screening, burn-in, and electrical testing per the specification, making it suitable for defense and space applications.
What is the thermal resistance and derating behavior of CDLL4129?
CDLL4129 has a maximum junction-to-end-cap thermal resistance (RθJC) of 100 °C/W at L = 0 inch. Power dissipation is rated at 500 mW up to +125°C end-cap temperature, then derates linearly at 10 mW/°C above that point - reaching zero dissipation at +175°C junction temperature.
CDLL4129 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 62 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 500 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 47.1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AB
CDLL4129 FAQ
1.How can I place an order for CDLL4129 through Aetrix?
Please submit a Request for Quotation (RFQ) for CDLL4129 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 CDLL4129 reliable?
The price and inventory of CDLL4129 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CDLL4129 is usually 5 days.
3.What payment methods are accepted for CDLL4129?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CDLL4129 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CDLL4129?
CDLL4129 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CDLL4129 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 CDLL4129?
For technical support, including CDLL4129 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CDLL4129 requirements.
6.How does Aetrix verify that CDLL4129 is sourced from the original manufacturer or authorized distributors?
All CDLL4129 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 CDLL4129 meets industry standards.
7.What is the process for return or replacement of CDLL4129?
All CDLL4129 units undergo pre-shipment inspection (PSI). If there is an issue with CDLL4129, 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 CDLL4129 part is unused and in its original packaging.
Return procedure for CDLL4129:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CDLL4129 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…
