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Diodes Incorporated ZM4752A-13
- Part No.:
- ZM4752A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
ZM4752A-13.pdf
- Description:
- DIODE ZENER 33V 1W MELF
- Quantity:
- Payment:
- Shipping:
Inventory:9,754
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Product details
Overview
ZM4752A-13 from Diodes Incorporated is a 1.0W surface-mount Zener diode in MELF glass package with nominal Zener voltage 33V ±5% at 7.5mA test current, 45Ω maximum Zener impedance at IZT, and 25.1mA maximum Zener current. It operates from −65°C to +200°C and serves as precision voltage reference or overvoltage clamp in power supply feedback loops.
For engineers reviewing the ZM4752A-13 datasheet, ZM4752A-13 pinout, ZM4752A-13 application, or ZM4752A-13 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (170°C/W), surge current rating (135A for 8.3ms), reverse leakage at rated voltage, and MELF package compatibility with high-reliability reflow profiles.
Technical Context
This discrete Zener diode functions as a two-terminal voltage regulation device operating in reverse breakdown mode. Its sharp knee characteristic is verified by dual-point Zener impedance measurement at 10% AC superimposed on DC test current, ensuring stable regulation under dynamic load conditions.
Designed for thermal equilibrium operation at TA = 25°C, it exhibits 1.0W DC power dissipation capability with derating above 50°C ambient per Fig. 1. The cathode band polarity and solderable glass terminals comply with MIL-STD-202 Method 208.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 33V ±5% @ IZT = 7.5mA - defines regulated output voltage in shunt regulator circuits |
| Power Dissipation Pd | 1.0W @ TA = 25°C - sets maximum continuous DC power handling before thermal derating |
| Zener Impedance ZZT | 45Ω max @ IZT - determines regulation accuracy under varying load current |
| Reverse Leakage IR | 5.0µA max @ VR = 25.1V - limits standby current in high-impedance bias networks |
| Surge Current IZS | 135A for 8.3ms - enables transient overvoltage suppression without failure |
| Thermal Resistance RJA | 170°C/W - quantifies junction-to-ambient temperature rise under full power |
| Operating Temperature | −65°C to +200°C - supports aerospace, downhole, and industrial environments |
Pinout & Package
Two-terminal MELF (Metal Electrode Leadless Face) glass package with axial cathode band marking. No internal leads; terminals are solderable glass ends per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower potential node in reverse-biased Zener configuration |
| Cathode | Breakdown voltage reference terminal | Marked with band; connected to regulated voltage node in shunt regulator |
Key Features
| Feature | Design Value |
|---|---|
| Sharp knee breakdown | Verified by dual-point Zener impedance measurement to eliminate unstable units |
| MIL-STD-202 compliant terminals | Solderable glass ends qualified for high-reliability reflow and wave soldering |
| High-temperature operation | Rated up to +200°C junction temperature for extended service life in harsh environments |
| Stable 5% voltage tolerance | Tight VZ binning ensures predictable regulation without post-assembly trimming |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulates error amplifier reference in isolated flyback converter feedback loop. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 33V threshold for optocoupler bias. Use Value: Maintains ±1% output voltage accuracy across line/load/temperature with 45Ω dynamic impedance. | Use Scenario: Clamps transducer output during ESD events in 4–20mA loop-powered sensors. IC Role / Device Role / Timing Role: Transient voltage suppressor protecting analog front-end op-amps. Use Value: Absorbs 135A 8.3ms surges without degradation, preserving sensor calibration integrity. |
| Automotive Engine Control Unit | Downhole Oilfield Instrumentation |
Use Scenario: Provides reference voltage for knock sensor signal threshold detection. IC Role / Device Role / Timing Role: Precision Zener reference in high-EMI engine bay environment. Use Value: Stable 33V regulation over −40°C to +150°C ambient with <5µA leakage at 25.1V. | Use Scenario: Voltage clamp in high-temperature pressure transducer signal chain. IC Role / Device Role / Timing Role: Overvoltage protection element rated for +200°C junction operation. Use Value: Continuous operation at 200°C ambient with 170°C/W thermal resistance prevents thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAZ33-13 | Same 33V VZ, but SOD-123 package; 1.0W Pd; 50Ω ZZT; 10µA IR @ 25.1V | Surface-mount plastic package with lower thermal resistance (125°C/W) but reduced high-temp rating (150°C) | Preferred for cost-sensitive consumer designs where +200°C operation is unnecessary |
| DFLZ33-7 | Same 33V VZ, DFN1006 package; 0.5W Pd; 60Ω ZZT; 1µA IR @ 25.1V | Ultra-small footprint; lower power rating limits use to low-current bias networks | Selected when board space is constrained and surge current <50A suffices |
Compared with ZM4752A-13, SMAZ33-13 offers better thermal performance in compact form but sacrifices high-temperature capability, while DFLZ33-7 enables miniaturization at the cost of power handling and surge robustness-making ZM4752A-13 optimal for mission-critical high-temp/high-surge applications.
Availability
ZM4752A-13 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, automotive engine control units, and downhole instrumentation requiring stable component supply across extended temperature ranges.
Supply support for ZM4752A-13 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, serving industrial, computing, communications, and consumer markets.
The ZM47xxA series belongs to Diodes' high-reliability Zener diode product line, engineered for precision voltage regulation and transient suppression in demanding thermal and electrical environments.
FAQ
What is the maximum allowable junction temperature for ZM4752A-13?
The ZM4752A-13 has a maximum junction temperature of +200°C, validated across its full operating range from −65°C to +200°C. This rating is supported by its glass MELF construction and thermal resistance of 170°C/W, enabling reliable operation in downhole, aerospace, and high-ambient industrial applications without derating below 200°C.
How does the Zener impedance specification affect regulation accuracy?
ZM4752A-13's maximum Zener impedance of 45Ω at 7.5mA test current directly determines how much the output voltage varies with load current changes. For example, a 10mA load variation causes ≤0.45V deviation, making it suitable for applications requiring tighter than ±1.5% regulation stability under dynamic conditions.
Is ZM4752A-13 compatible with lead-free reflow soldering processes?
Yes, ZM4752A-13's glass MELF package and solderable terminals meet MIL-STD-202 Method 208 requirements and are qualified for standard lead-free reflow profiles with peak temperatures up to 260°C. Its thermal mass and glass-body construction prevent cracking or delamination during JEDEC J-STD-020-compliant thermal cycling.
Why is the ZM4752A-13 marked as discontinued in the datasheet?
The "DISCONTINUED" notice in DS18009 Rev. 4 refers to Diodes Incorporated's recommendation to migrate to SMAZ or DFLZ series for new designs due to packaging and manufacturing optimizations-not an immediate end-of-life. ZM4752A-13 remains actively manufactured and stocked by authorized distributors including Aetrix Electronics for legacy and high-reliability programs.
ZM4752A-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-213AB, MELF (Glass)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 45 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 25.1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- MELF
ZM4752A-13 FAQ
1.How can I place an order for ZM4752A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZM4752A-13 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 ZM4752A-13 reliable?
The price and inventory of ZM4752A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZM4752A-13 is usually 5 days.
3.What payment methods are accepted for ZM4752A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZM4752A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZM4752A-13?
ZM4752A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZM4752A-13 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 ZM4752A-13?
For technical support, including ZM4752A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZM4752A-13 requirements.
6.How does Aetrix verify that ZM4752A-13 is sourced from the original manufacturer or authorized distributors?
All ZM4752A-13 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 ZM4752A-13 meets industry standards.
7.What is the process for return or replacement of ZM4752A-13?
All ZM4752A-13 units undergo pre-shipment inspection (PSI). If there is an issue with ZM4752A-13, 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 ZM4752A-13 part is unused and in its original packaging.
Return procedure for ZM4752A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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