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Diodes Incorporated ZMM5233B-7
- Part No.:
- ZMM5233B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-213AC, MINI-MELF, SOD-80
- Datasheet:
-
ZMM5233B-7.pdf
- Description:
- DIODE ZENER 6V 500MW MINI MELF
- Quantity:
- Payment:
- Shipping:
Inventory:3,020
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Product details
Overview
ZMM5233B-7 from Diodes Incorporated is a 6.0 V, ±5% tolerance, 500 mW surface-mount Zener diode in MiniMELF (DO-213AA) glass package, designed for precision voltage regulation and reference applications at 20 mA test current, with 7.0 Ω typical zener impedance and +0.038 %/°C temperature coefficient. It operates across -65°C to +175°C and is used in power supply feedback loops, overvoltage protection circuits, and analog voltage references.
For engineers reviewing the ZMM5233B-7 datasheet, ZMM5233B-7 pinout, ZMM5233B-7 application, or ZMM5233B-7 equivalent, key selection criteria include zener voltage accuracy at IZT = 20 mA, low dynamic impedance (7.0 Ω), thermal stability (+0.038 %/°C), MiniMELF package compatibility with high-reliability PCB layouts, and RoHS-compliant Sn97.5Ag2.5 terminations.
Technical Context
This Zener diode functions as a two-terminal voltage reference device, maintaining stable reverse-biased breakdown at nominal 6.0 V with tight 5.70–6.30 V range. Its glass-encapsulated MiniMELF construction provides hermetic sealing and high-temperature operation up to +175°C junction temperature.
It exhibits low differential impedance (7.0 Ω @ IZT = 20 mA) and a positive temperature coefficient (+0.038 %/°C), enabling predictable drift compensation in reference designs. Thermal resistance is 300 °C/W (junction-to-ambient), validated under ambient-sink conditions per Note 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.0 V nominal, 5.70–6.30 V min/max at IZT = 20 mA - defines regulated output voltage window for feedback or clamping. |
| Power Dissipation (PD) | 500 mW - maximum continuous DC power handling at TA = 25°C; derates linearly above 25°C per Fig.1. |
| Zener Impedance (ZZT) | 7.0 Ω typical @ IZT = 20 mA - determines AC ripple rejection and regulation stiffness in reference circuits. |
| Temperature Coefficient | +0.038 %/°C - quantifies voltage drift per degree Celsius; enables thermal error budgeting in precision systems. |
| Reverse Current (IR) | 5.0 µA max @ VR = 3.5 V - specifies leakage level below breakdown, critical for low-power standby operation. |
| Junction-to-Ambient RθJA | 300 °C/W - defines thermal rise per watt; requires adequate PCB copper area or airflow for sustained 500 mW operation. |
| Operating Temperature | -65°C to +175°C - supports industrial, automotive under-hood, and aerospace environments without derating. |
Pinout & Package
Package: MiniMELF (DO-213AA) - hermetically sealed glass cylindrical package, 3.30–3.70 mm length, 1.30–1.60 mm diameter, cathode band marking. UL 94V-0 rated, lead-free, RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit common or lower-potential rail; forms return path during forward bias or Zener reference configuration. |
| Cathode | Zener breakdown terminal / Regulated output node | Connected to regulated voltage point; supplies stable 6.0 V reference when reverse biased at ≥20 mA. |
Key Features
| Feature | Design Value |
|---|---|
| MiniMELF glass package | Hermetic seal ensures long-term parameter stability and moisture resistance in harsh environments. |
| ±5% VZ tolerance | Enables use in cost-sensitive applications where 6.0 V regulation within 0.3 V margin is acceptable. |
| Low ZZT = 7.0 Ω | Minimizes output voltage variation under load transients, improving regulation in switching power supply feedback paths. |
| +0.038 %/°C tempco | Allows predictable, linear voltage drift-simplifies compensation in temperature-critical analog references. |
| RoHS-compliant Sn97.5Ag2.5 finish | Ensures reliable solderability per MIL-STD-202 Method 208 and compatibility with lead-free reflow profiles. |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
Use Scenario: Used in secondary-side feedback loop of isolated DC-DC converters to regulate output voltage via optocoupler interface. IC Role / Device Role / Timing Role: Zener reference node setting TL431 or optocoupler LED current threshold. Use Value: Tight 6.0 V ±5% tolerance and 7.0 Ω impedance ensure stable regulation despite input line/load variations. |
Use Scenario: Placed across sensitive IC inputs to limit transient overvoltage from ESD or inductive kickback. IC Role / Device Role / Timing Role: Shunt clamp absorbing surge energy by entering controlled breakdown at 6.0 V. Use Value: Fast response and 500 mW rating allow safe dissipation of short-duration transients without degradation. |
| Analog Voltage Reference | Microcontroller Reset Circuit |
Use Scenario: Provides stable 6.0 V reference for ADC calibration or DAC output scaling in industrial sensor interfaces. IC Role / Device Role / Timing Role: Passive reference source feeding precision op-amp or voltage divider network. Use Value: +0.038 %/°C tempco and -65°C to +175°C operation enable accurate measurements across wide ambient ranges. |
Use Scenario: Configured in RC-reset network with microcontroller's reset pin to generate clean power-on reset pulse. IC Role / Device Role / Timing Role: Threshold element defining reset release voltage level (e.g., 6.0 V → 3.3 V via resistor divider). Use Value: Low leakage (5.0 µA @ 3.5 V) prevents premature reset release; MiniMELF size fits compact MCU layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5233B-7 | Same 6.0 V nominal, ±5% tolerance, but SOD-123 plastic package; 100 mW PD; ZZT = 10 Ω; tempco +0.038 %/°C. | Lower power rating limits use to low-current references (<10 mA); plastic package less suitable for >125°C environments. | Select for cost-sensitive, space-constrained consumer designs where thermal stress is minimal. |
| BZX55C6V2-TR | 6.2 V nominal, ±5%, DO-35 glass package; 500 mW PD; ZZT = 10 Ω; tempco +0.055 %/°C. | Higher nominal voltage and tempco reduce accuracy in 6.0 V-critical circuits; DO-35 leads require axial mounting. | Choose only if 6.2 V is acceptable and through-hole assembly is required; not drop-in compatible. |
Compared with ZMM5233B-7, MMSZ5233B-7 trades thermal robustness and power capability for smaller footprint and lower cost, while BZX55C6V2-TR offers identical power rating but inferior voltage accuracy and thermal stability in a legacy through-hole form factor.
Availability
ZMM5233B-7 is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, and analog voltage reference applications requiring stable component supply across industrial, test equipment, and embedded control platforms.
Supply support for ZMM5233B-7 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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with emphasis on reliability, efficiency, and manufacturability for high-volume electronics.
ZMM52xx series belongs to Diodes' legacy Zener diode portfolio targeting general-purpose voltage regulation and reference needs in cost-optimized, thermally demanding applications.
FAQ
What is the maximum continuous reverse current the ZMM5233B-7 can handle without degradation?
The ZMM5233B-7 is rated for 20 mA test current (IZT) and 500 mW power dissipation at 25°C ambient. Continuous reverse current must be limited to maintain junction temperature ≤175°C-derating to ~12 mA at 100°C ambient per Fig.1. Exceeding thermal limits causes parametric shift or catastrophic failure.
Can ZMM5233B-7 be used in place of a 5.6 V Zener for higher-voltage reference needs?
No-ZMM5233B-7 has a fixed 6.0 V nominal breakdown (5.70–6.30 V range). Substituting it for a 5.6 V part (e.g., ZMM5232B) alters regulation point by ~400 mV, potentially causing overvoltage in feedback or clamp circuits. Always match nominal VZ and tolerance to system requirements.
Is the MiniMELF package compatible with standard reflow soldering profiles?
Yes-the Sn97.5Ag2.5 termination meets MIL-STD-202 Method 208 and supports lead-free reflow. Peak temperature must not exceed 260°C for ≤10 seconds; thermal shock from rapid ramp rates should be avoided due to glass body brittleness.
Why is ZMM5233B-7 marked as "Not Recommended for New Design"?
Diodes Incorporated recommends MMSZ52xx series as the modern replacement due to improved manufacturing consistency, tighter parametric distributions, and SOD-123 packaging better suited for automated assembly. ZMM5233B-7 remains fully functional but is legacy-qualified with longer lead times and diminishing long-term supply assurance.
ZMM5233B-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-213AC, MINI-MELF, SOD-80
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 6 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3.5 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Mini MELF
ZMM5233B-7 FAQ
1.How can I place an order for ZMM5233B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZMM5233B-7 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 ZMM5233B-7 reliable?
The price and inventory of ZMM5233B-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZMM5233B-7 is usually 5 days.
3.What payment methods are accepted for ZMM5233B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZMM5233B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZMM5233B-7?
ZMM5233B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZMM5233B-7 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 ZMM5233B-7?
For technical support, including ZMM5233B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZMM5233B-7 requirements.
6.How does Aetrix verify that ZMM5233B-7 is sourced from the original manufacturer or authorized distributors?
All ZMM5233B-7 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 ZMM5233B-7 meets industry standards.
7.What is the process for return or replacement of ZMM5233B-7?
All ZMM5233B-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZMM5233B-7, 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 ZMM5233B-7 part is unused and in its original packaging.
Return procedure for ZMM5233B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZMM5233B-7 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
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
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