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Diodes Incorporated 1N5252B-T
- Part No.:
- 1N5252B-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5252B-T.pdf
- Description:
- DIODE ZENER 24V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:7,848
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Product details
Overview
1N5252B-T from Diodes Incorporated is a 24V ±5% tolerance, 500mW surface-mount Zener diode in a hermetic DO-35 glass package, rated for 5.2mA test current and 33Ω dynamic impedance at VZ, used for precision voltage regulation and reference in low-power analog circuits.
For engineers reviewing the 1N5252B-T datasheet, 1N5252B-T pinout, 1N5252B-T application, or 1N5252B-T equivalent, key selection criteria include its 24V nominal Zener voltage, ±5% tolerance, 33Ω Zener impedance at 5.2mA, -65°C to +175°C operating range, and DO-35 mechanical compatibility with legacy through-hole footprint adaptations.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable voltage across load variations, with temperature coefficient of +0.087%/°C ensuring predictable drift in bias networks. Its 300°C/W junction-to-ambient thermal resistance requires lead length control (≤9.5mm) to sustain full 500mW dissipation.
The device features a cathode band polarity marker, Sn96.5Ag3.5 solderable terminals per MIL-STD-202 Method 208, and moisture sensitivity Level 1 per J-STD-020 - confirming suitability for standard reflow without baking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24V nominal, 22.8–25.2V range at 5.2mA - defines regulated output level in shunt reference designs |
| Power Dissipation (PD) | 500mW - maximum continuous DC power under specified lead length and ambient conditions |
| Zener Impedance (ZZT) | 33Ω at IZT = 5.2mA - determines AC ripple rejection and regulation stiffness |
| Reverse Leakage (IR) | 0.1µA at VR = 18V - ensures minimal error current in high-impedance bias networks |
| Temp. Coefficient (αVZ) | +0.087%/°C - quantifies voltage drift per degree Celsius above 25°C |
| Operating Temp. Range | -65°C to +175°C - supports industrial and automotive under-hood applications |
Pinout & Package
Package: DO-35 glass axial package with cathode band marking; case material is hermetic glass; weight ≈ 0.13g; polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower potential node in shunt regulator configuration |
| Cathode | Reverse breakdown terminal / regulated output node | Connected to input supply via series resistor; delivers stable 24V to load |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass package | Ensures long-term parameter stability and moisture immunity in harsh environments |
| ±5% Zener voltage tolerance | Enables tight voltage reference accuracy without post-manufacture trimming |
| Lead-free, RoHS-compliant finish | Sn96.5Ag3.5 plating meets EU Directive 2015/863/EU and supports Pb-free assembly |
| High-temperature operation | Rated up to +175°C junction temperature - suitable for engine control and power supply monitoring |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Providing stable 24V reference for linear regulators and op-amp feedback networks in industrial PLC power modules. IC Role / Device Role / Timing Role: Shunt voltage reference maintaining regulation despite input ripple and load transients. Use Value: 33Ω ZZT and +0.087%/°C TC enable <±1.5% total error over -40°C to +85°C ambient. |
Use Scenario: Clamping transient surges on 24V CAN bus lines in automotive body control units. IC Role / Device Role / Timing Role: Reverse-biased crowbar element diverting ESD or load-dump energy to ground. Use Value: 500mW rating and 0.1µA leakage at 18V ensure low standby loss and fast clamping response. |
| Sensor Bias Network | Calibration Voltage Source |
Use Scenario: Supplying excitation voltage to 4–20mA current-loop pressure sensors in HVAC systems. IC Role / Device Role / Timing Role: Precision bias source establishing sensor bridge operating point. Use Value: ±5% VZ tolerance and hermetic packaging minimize calibration drift over 10-year field life. |
Use Scenario: Generating known 24V reference for ADC offset calibration in portable test equipment. IC Role / Device Role / Timing Role: Stable DC voltage source for ratiometric measurement correction. Use Value: Low 0.1µA reverse current prevents loading of high-impedance calibration dividers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5252B | Surface-mount SOD-123 package; same 24V/±5%/500mW specs but lower ZZT (25Ω) | Better suited for automated PCB assembly; not mechanically interchangeable with DO-35 | Select when board space and reflow compatibility outweigh legacy footprint requirements |
| 1N4749A | 24V/±5%, 1W power rating, DO-41 package; higher PD but larger footprint and +0.095%/°C TC | Used where higher surge energy handling is required, e.g., front-end protection | Choose only if thermal margin >500mW is mandatory and DO-41 mounting is acceptable |
Compared with MMSZ5252B and 1N4749A, the 1N5252B-T offers optimal balance of legacy DO-35 compatibility, hermetic reliability, and precise 24V regulation - making it preferred for repair, replacement, and high-stability analog references where SMT conversion is not feasible.
Availability
1N5252B-T is available at Aetrix Electronics and suitable for industrial sensor biasing, analog voltage reference, and overvoltage clamping requiring stable component supply and long-lifecycle support.
Supply support for 1N5252B-T 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
The 1N52xxB series belongs to Diodes' legacy Zener diode product line, engineered for high-stability voltage reference and regulation in cost-sensitive, high-reliability industrial and automotive applications.
FAQ
Is the 1N5252B-T still in active production?
No - Diodes Incorporated has marked the 1N5252B-T as obsolete and discontinued. It remains available through authorized distributors for legacy repair and continuity programs, but no new wafer fabrication is scheduled. Customers should transition to MMSZ5252B for new designs requiring identical electrical performance in SMT format.
What is the maximum allowable forward current for the 1N5252B-T?
The datasheet does not specify a rated forward current, as this device is optimized for reverse-bias Zener operation. Forward conduction follows standard silicon diode behavior: VF ≈ 1.1V at IF = 200mA. For sustained forward use, derate per thermal limits - junction temperature must remain ≤175°C with appropriate heatsinking and lead length control.
Can the 1N5252B-T be used in place of the 1N4749A?
Electrically, both regulate at 24V with ±5% tolerance, but the 1N5252B-T has lower power rating (500mW vs. 1W), higher ZZT (33Ω vs. ~20Ω), and different thermal resistance (300°C/W vs. ~125°C/W). Substitution is acceptable only if power dissipation stays below 500mW and thermal design accommodates higher junction temperature rise.
Does the 1N5252B-T meet AEC-Q200 stress testing requirements?
No - the 1N5252B-T is not AEC-Q200 qualified. While it operates from -65°C to +175°C and uses hermetic construction, Diodes Incorporated does not list it in their AEC-Q200-certified Zener portfolio. For automotive applications requiring qualification, consider the AZ24-M or MMBZ5252B-Q variants instead.
1N5252B-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 33 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 18 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
1N5252B-T FAQ
1.How can I place an order for 1N5252B-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5252B-T 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 1N5252B-T reliable?
The price and inventory of 1N5252B-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5252B-T is usually 5 days.
3.What payment methods are accepted for 1N5252B-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5252B-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5252B-T?
1N5252B-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5252B-T 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 1N5252B-T?
For technical support, including 1N5252B-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5252B-T requirements.
6.How does Aetrix verify that 1N5252B-T is sourced from the original manufacturer or authorized distributors?
All 1N5252B-T 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 1N5252B-T meets industry standards.
7.What is the process for return or replacement of 1N5252B-T?
All 1N5252B-T units undergo pre-shipment inspection (PSI). If there is an issue with 1N5252B-T, 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 1N5252B-T part is unused and in its original packaging.
Return procedure for 1N5252B-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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