Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Microchip Technology CDLL4627

Name: CDLL4627
Brand: Microchip Technology
SKU: CDLL4627
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: CDLL4627

Manufacturer:: Microchip Technology

Category:: Single Zener Diodes

Package:: DO-213AA

Datasheet:: CDLL4627.pdf

Description:: DIODE ZENER 6.2V 500MW DO213AA

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,162

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

CDLL4627 from Microsemi is a hermetically sealed, glass-encapsulated MELF (DO-213AA) Zener diode with nominal 6.2 V Zener voltage, ±5% tolerance, 250 µA test current, 1200 Ω dynamic impedance at I_ZT, and 10 µA maximum reverse leakage at 5 V. It operates from −65°C to +175°C and delivers stable voltage reference in precision analog power rails.

For engineers reviewing the CDLL4627 datasheet, CDLL4627 pinout, CDLL4627 application, or CDLL4627 equivalent, key selection criteria include its low-current operation at 250 µA, hermetic glass package for high-reliability environments, thermal resistance of 100 °C/W, and compatibility with MIL-PRF-19500/435 screening levels (JAN/JANTX/JANTXV/JANS).

Technical Context

The CDLL4627 functions as a two-terminal voltage reference device, operating in reverse-biased Zener breakdown mode. Its metallurgically bonded junction ensures long-term stability under thermal cycling, and its axial coefficient of expansion (+6 ppm/°C) is matched to ceramic and Kovar substrates for minimal mechanical stress during reflow or burn-in.

Designed for low-current regulation, it maintains specified Zener voltage at I_ZT = 5 mA with V_Z = 6.2 V and Z_ZT = 1200 Ω. Reverse leakage remains ≤10 µA at V_R = 5 V, supporting accurate threshold detection in battery-backed and aerospace-grade circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	6.2 V nominal at I_ZT = 5 mA; ±5% tolerance ensures predictable clamping in reference circuits.
Zener Test Current (I_ZT)	5 mA; defines the operating point where V_Z and Z_ZT are guaranteed per spec.
Zener Impedance (Z_ZT)	1200 Ω max at I_ZT = 5 mA; indicates voltage regulation sensitivity to current variation.
Reverse Leakage (I_R)	≤10 µA at V_R = 5 V; enables low-power standby monitoring without loading source.
Power Dissipation	500 mW @ T_EC = +125°C; derates linearly to zero at +175°C for high-temp system design.
Operating Temperature	−65°C to +175°C; qualified for military, downhole, and avionics applications requiring extreme environmental resilience.
Package Type	DO-213AA (MELF, SOD-80, LL34); hermetically sealed glass case prevents moisture ingress and parameter drift.

Pinout & Package

DO-213AA (MELF) glass package: cylindrical, leadless, surface-mountable body with axial cathode band marking. Cathode end is banded; polarity must be observed for correct reverse-bias operation.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Zener reference ground node	Connected to circuit common or lower-potential rail; establishes reference baseline for V_Z.
Cathode	Reverse-bias terminal / Zener output node	Banded end; supplies regulated 6.2 V when reverse-biased above breakdown threshold.

Key Features

Feature	Design Value
Hermetic glass sealing	Prevents humidity-induced parameter shift and long-term degradation in harsh environments.
MIL-PRF-19500/435 qualification	Available in JAN/JANTX/JANTXV/JANS grades for defense and space programs requiring traceable screening.
Low-current Zener operation	Stable 6.2 V regulation at I_ZT = 5 mA - ideal for low-power sensor biasing and backup reference rails.
Metallurgical bonding	Enhances thermal cycling reliability and reduces interfacial resistance versus epoxy-bonded alternatives.
Matched CTE (+6 ppm/°C)	Minimizes solder joint fatigue on ceramic PCBs and hybrid modules during thermal excursions.

Applications

Avionics Power Monitoring	Downhole Sensor Reference
Use Scenario: Monitoring 28 V aircraft bus voltage with overvoltage lockout circuitry. IC Role / Device Role / Timing Role: Zener reference element in comparator input stage defining trip threshold. Use Value: Stable 6.2 V reference ensures consistent trip point across −65°C to +175°C ambient range without calibration drift.	Use Scenario: Providing bias voltage to piezoresistive pressure transducers in oil/gas well logging tools. IC Role / Device Role / Timing Role: Low-current voltage reference for signal conditioning front-end amplifiers. Use Value: 10 µA leakage at 5 V prevents loading of high-impedance sensor outputs while maintaining accuracy at 175°C.
Spacecraft Battery Management	Military Radio RF Biasing
Use Scenario: Regulating auxiliary 6.2 V rail for EEPROM write protection circuitry in satellite subsystems. IC Role / Device Role / Timing Role: Precision shunt regulator supplying clean reference to voltage supervisor ICs. Use Value: Hermetic DO-213AA package eliminates outgassing risk and meets NASA/ESA contamination requirements.	Use Scenario: Setting gate bias for GaN HEMT drivers in tactical HF/VHF transceivers. IC Role / Device Role / Timing Role: Zener clamp protecting gate drive circuitry from transient overvoltage. Use Value: 1200 Ω Z_ZT limits voltage excursion during ESD events while surviving repeated 175°C thermal cycles.

Avionics Power Monitoring

Downhole Sensor Reference

Use Scenario: Monitoring 28 V aircraft bus voltage with overvoltage lockout circuitry.

IC Role / Device Role / Timing Role: Zener reference element in comparator input stage defining trip threshold.

Use Value: Stable 6.2 V reference ensures consistent trip point across −65°C to +175°C ambient range without calibration drift.

Use Scenario: Providing bias voltage to piezoresistive pressure transducers in oil/gas well logging tools.

IC Role / Device Role / Timing Role: Low-current voltage reference for signal conditioning front-end amplifiers.

Use Value: 10 µA leakage at 5 V prevents loading of high-impedance sensor outputs while maintaining accuracy at 175°C.

Spacecraft Battery Management

Military Radio RF Biasing

Use Scenario: Regulating auxiliary 6.2 V rail for EEPROM write protection circuitry in satellite subsystems.

IC Role / Device Role / Timing Role: Precision shunt regulator supplying clean reference to voltage supervisor ICs.

Use Value: Hermetic DO-213AA package eliminates outgassing risk and meets NASA/ESA contamination requirements.

Use Scenario: Setting gate bias for GaN HEMT drivers in tactical HF/VHF transceivers.

IC Role / Device Role / Timing Role: Zener clamp protecting gate drive circuitry from transient overvoltage.

Use Value: 1200 Ω Z_ZT limits voltage excursion during ESD events while surviving repeated 175°C thermal cycles.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener reference applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4627UR-1	Same Zener voltage (6.2 V), identical DO-213AA package, but offered in MIL-qualified screened versions (JAN/JANTXV) with full lot traceability.	Required for DoD procurement contracts mandating MIL-PRF-19500 compliance and certificate of conformance.	Select 1N4627UR-1 when formal military screening and documentation are mandatory.
CDLL4627C	Same base part with ±2% Zener tolerance (vs. ±5% for CDLL4627), tighter V_Z distribution, same package and thermal specs.	Suitable for higher-accuracy references where 6.2 V ±0.124 V is required instead of ±0.31 V.	Choose CDLL4627C when improved initial voltage accuracy justifies cost premium.

Compared with CDLL4627, 1N4627UR-1 adds formal military screening and traceability without altering electrical behavior, while CDLL4627C improves Zener tolerance from ±5% to ±2% - both retain identical thermal, mechanical, and packaging characteristics for drop-in use in existing layouts.

Availability

CDLL4627 is available at Aetrix Electronics and suitable for avionics power monitoring, downhole sensor reference, spacecraft battery management, and military radio RF biasing requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CDLL4627 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) designs high-reliability analog and mixed-signal components for aerospace, defense, and industrial markets.

The CDLL46xx series belongs to Microsemi's hermetic Zener diode family, engineered specifically for precision voltage reference and overvoltage protection in mission-critical systems operating beyond commercial temperature limits.

FAQ

What is the Zener voltage tolerance for CDLL4627?

The CDLL4627 has a nominal Zener voltage of 6.2 V with a tolerance of ±5.0%, as defined in Note 1 of the official Microsemi specification sheet. This tolerance applies under thermal equilibrium at 25°C ±3°C and reflects the standard grade; tighter tolerances (±2% or ±1%) are available via suffixes C or D, respectively, in separate part numbers such as CDLL4627C.

Is CDLL4627 suitable for surface-mount assembly?

Yes, CDLL4627 uses the DO-213AA (MELF) package - a leadless, cylindrical glass body designed for surface-mount reflow processes. Its axial symmetry and hermetic seal support automated placement and high-yield soldering on ceramic or metal-core PCBs, especially where thermal cycling reliability is critical.

What is the maximum reverse leakage current for CDLL4627?

The CDLL4627 specifies a maximum reverse leakage current of 10 µA at V_R = 5 V, measured at 25°C. This low leakage supports high-impedance sensing and battery-backed applications where standby current must remain minimal without compromising reference stability.

Does CDLL4627 meet military specifications?

CDLL4627 itself is the commercial-grade version; however, its direct counterpart 1N4627UR-1 is fully compliant with MIL-PRF-19500/435 and available in JAN, JANTX, JANTXV, and JANS screening levels. The CDLL4627 shares identical electrical and mechanical specs but lacks formal military qualification documentation.

What is the thermal resistance of CDLL4627?

The CDLL4627 has a maximum thermal resistance (R_θJA) of 100 °C/W at L = 0 inch, as stated in the "Thermal Resistance (ROJEC)" specification. This value assumes no heatsinking and defines the junction-to-ambient temperature rise under DC power dissipation, critical for thermal design in sealed or high-temperature enclosures.

CDLL4627 Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: DO-213AA

Packaging:: Bulk

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 6.2 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 1200 Ohms

Current - Reverse Leakage @ Vr:: 5 µA @ 5 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-213AA

CDLL4627 FAQ

1.How can I place an order for CDLL4627 through Aetrix?

Please submit a Request for Quotation (RFQ) for CDLL4627 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 CDLL4627 reliable?

The price and inventory of CDLL4627 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CDLL4627 is usually 5 days.

3.What payment methods are accepted for CDLL4627?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CDLL4627 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CDLL4627?

CDLL4627 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CDLL4627 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 CDLL4627?

For technical support, including CDLL4627 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CDLL4627 requirements.

6.How does Aetrix verify that CDLL4627 is sourced from the original manufacturer or authorized distributors?

All CDLL4627 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 CDLL4627 meets industry standards.

7.What is the process for return or replacement of CDLL4627?

All CDLL4627 units undergo pre-shipment inspection (PSI). If there is an issue with CDLL4627, 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 CDLL4627 part is unused and in its original packaging.

Return procedure for CDLL4627:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

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.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

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…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

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…