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Microchip Technology CDLL5525B
- Part No.:
- CDLL5525B
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF
- Datasheet:
-
CDLL5525B.pdf
- Description:
- DIODE ZENER 6.2V 500MW DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,628
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Product details
Overview
CDLL5525B from Microsemi is a hermetically sealed, glass-encapsulated Zener diode in DO-213AA (MELF/SOD-80/LL34) package, rated for 500mW power dissipation at +125°C, with nominal Zener voltage 6.2V ±5% at 1.0mA test current, maximum Zener impedance 30Ω, and reverse leakage ≤1.0µA at 4.5V. It serves as precision voltage reference or overvoltage clamp in aerospace-grade analog signal conditioning circuits.
For engineers reviewing the CDLL5525B datasheet, CDLL5525B pinout, CDLL5525B application, or CDLL5525B equivalent, key selection criteria include its MIL-PRF-19500/437 qualification, ±5% voltage tolerance (B-suffix), low 1.0µA leakage at VR=4.5V, 30Ω dynamic impedance, and operation across –65°C to +175°C junction temperature range.
Technical Context
This device operates as a two-terminal, cathode-banded voltage regulator diode. Its metallurgically bonded junction ensures stable Zener breakdown under thermal cycling, and the hermetic glass package provides immunity to moisture and contaminants required for high-reliability military and space applications.
It is specified per MIL-PRF-19500/437 Level JANTXV, with guaranteed limits across six parameters - VZ, IR, VF, ∆VZ, ZZT, and IZL - enabled by the "B" suffix. Thermal resistance is 100°C/W (junction-to-case), supporting stable regulation up to +125°C ambient with 10mW/°C derating above that point.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 6.2V ±5% at IZT = 1.0mA - enables precise mid-range voltage reference in analog front-ends |
| Max Zener Impedance | 30Ω at IZT = 1.0mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage Current | ≤1.0µA at VR = 4.5V - guarantees low standby power loss in battery-backed circuits |
| Power Dissipation | 500mW at TEC = +125°C - supports continuous operation in high-temperature avionics enclosures |
| Junction Temperature Range | –65°C to +175°C - qualified for extreme-environment deployment without derating penalties |
| Package Type | DO-213AA (MELF/SOD-80/LL34) - surface-mount, hermetically sealed glass case for reliability-critical PCBs |
| Qualification Standard | MIL-PRF-19500/437 JANTXV - meets U.S. Department of Defense requirements for screening and testing |
Pinout & Package
DO-213AA (MELF) package: cylindrical glass body with axial metallized ends; no leads - mounted via end-cap soldering. Cathode identified by black band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Current entry terminal during forward bias | Connected to lower-potential node; forward voltage ≤1.1V @ 200mA ensures low-loss biasing |
| Cathode (banded end) | Zener breakdown terminal during reverse bias | Connected to higher-potential node; regulates at 6.2V when reverse-biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass sealing | Prevents moisture ingress and parameter drift over decades in vacuum or humid environments |
| MIL-PRF-19500/437 JANTXV qualification | Includes lot traceability, burn-in, temperature cycling, and parametric screening per military standard |
| Metallurgical junction bonding | Eliminates wire bonds and interfacial delamination risks under mechanical shock/vibration |
| ±5% Zener voltage tolerance (B-suffix) | Guarantees full six-parameter specification compliance - critical for calibration-grade references |
| Low thermal resistance (100°C/W) | Enables direct mounting on thermally conductive substrates without heatsinking in compact modules |
Applications
| Avionics Power Monitoring | Satellite Sensor Biasing |
|---|---|
Use Scenario: Monitoring 28V DC bus voltage in flight control computers using resistive divider + comparator. IC Role / Device Role / Timing Role: Zener reference diode providing stable 6.2V threshold for comparator trip point. Use Value: ±5% tolerance and <1.0µA leakage ensure trip accuracy remains unaffected by temperature or aging over 15+ year mission life. | Use Scenario: Biasing photodiode preamplifier stages in star tracker focal plane arrays. IC Role / Device Role / Timing Role: Low-noise voltage reference establishing DC operating point for op-amp input stage. Use Value: 30Ω Zener impedance minimizes noise coupling into high-gain analog paths; hermetic seal prevents dark-current drift in vacuum. |
| Radiation-Hardened Data Acquisition | Tactical Radio RF Protection |
Use Scenario: Front-end protection and reference in nuclear-hardened ADC driver circuits exposed to total ionizing dose. IC Role / Device Role / Timing Role: Clamping transient overvoltage while maintaining stable reference for gain-setting resistors. Use Value: –65°C to +175°C operation and JANTXV screening allow uninterrupted function after 100 krad(Si) exposure without parameter shift. | Use Scenario: ESD and surge suppression at antenna interface of manpack HF radios. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as fast-acting shunt limiter for RF-induced transients. Use Value: Metallurgically bonded junction withstands repetitive 10A/100ns pulses without degradation; glass package avoids polymer outgassing in sealed chassis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5525BUR-1 | Same electrical specs, but in leadless ceramic package (DO-213AB); slightly higher ZZT (35Ω vs. 30Ω) | Higher thermal conductivity substrate required due to ceramic base; less suited for high-humidity storage | Select when board-level thermal management uses alumina substrates and MIL-STD-883 screening is mandatory |
| CDLL5525C | Identical package and construction, but ±2% Zener tolerance (C-suffix); tighter ∆VZ spec (0.20V vs. 0.25V) | Used where absolute voltage accuracy exceeds ±5%; requires tighter binning and higher cost | Select only if system calibration requires sub-0.1% absolute reference stability over temperature and life |
Compared with 1N5525BUR-1 and CDLL5525C, the CDLL5525B delivers optimal balance of JANTXV reliability, ±5% tolerance, and proven field performance in legacy avionics - making it preferred for sustainment programs where form-fit-function replacement is mandatory.
Availability
CDLL5525B is available at Aetrix Electronics and suitable for avionics power monitoring, satellite sensor biasing, radiation-hardened data acquisition, and tactical radio RF protection requiring stable component supply across extended product lifecycles.
Supply support for CDLL5525B 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 semiconductors for aerospace, defense, and industrial markets, with emphasis on radiation tolerance and long-term parametric stability.
The CDLL55xx series was developed specifically for MIL-PRF-19500-compliant Zener reference applications demanding hermeticity, wide temperature operation, and multi-decade shelf life in mission-critical systems.
FAQ
What is the Zener voltage tolerance for CDLL5525B?
The CDLL5525B has a nominal Zener voltage of 6.2V with a guaranteed tolerance of ±5%, as indicated by the "B" suffix per LDS-0037 Rev. 1. This tolerance applies under specified test conditions (IZT = 1.0mA, TA = 25°C), and all six electrical parameters - including VZ, IR, ZZT, ∆VZ, IZL, and VF - are fully guaranteed for CDLL5525B units.
Is CDLL5525B suitable for surface-mount assembly?
Yes, CDLL5525B uses the DO-213AA package (also known as MELF, SOD-80, or LL34), which is a leadless, cylindrical glass surface-mount device. It is designed for reflow soldering onto PCB pads with end-cap termination. The package dimensions (D = 1.60–1.70mm, G = 3.30–3.70mm) and tin/lead lead finish comply with standard SMT process requirements.
What is the maximum reverse leakage current for CDLL5525B?
The maximum reverse leakage current for CDLL5525B is 1.0µA at VR = 4.5V and TA = 25°C, as specified in the Electrical Characteristics table of LDS-0037 Rev. 1. This low leakage supports ultra-low-power bias networks and ensures minimal error contribution in high-impedance reference divider circuits.
Does CDLL5525B meet military specifications?
Yes, CDLL5525B is qualified per MIL-PRF-19500/437 at the JANTXV level, including full screening for temperature cycling, burn-in, and parametric testing. It carries JAN/JANTX/JANTXV markings and is traceable to lot-controlled manufacturing per military standards - confirming its suitability for defense and space applications.
What is the thermal resistance of CDLL5525B?
The junction-to-case thermal resistance (RθJEC) of CDLL5525B is 100°C/W maximum at L = 0 inch, as stated in the Thermal Resistance section of LDS-0037 Rev. 1. This value supports thermal design calculations for PCB copper area allocation and ensures safe 500mW operation at +125°C case temperature with appropriate derating above that point.
CDLL5525B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 1 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-213AB
CDLL5525B FAQ
1.How can I place an order for CDLL5525B through Aetrix?
Please submit a Request for Quotation (RFQ) for CDLL5525B 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 CDLL5525B reliable?
The price and inventory of CDLL5525B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CDLL5525B is usually 5 days.
3.What payment methods are accepted for CDLL5525B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CDLL5525B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CDLL5525B?
CDLL5525B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CDLL5525B 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 CDLL5525B?
For technical support, including CDLL5525B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CDLL5525B requirements.
6.How does Aetrix verify that CDLL5525B is sourced from the original manufacturer or authorized distributors?
All CDLL5525B 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 CDLL5525B meets industry standards.
7.What is the process for return or replacement of CDLL5525B?
All CDLL5525B units undergo pre-shipment inspection (PSI). If there is an issue with CDLL5525B, 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 CDLL5525B part is unused and in its original packaging.
Return procedure for CDLL5525B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CDLL5525B 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
Diodes Incorporated
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