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Diodes Incorporated ZMM5234B-7
- Part No.:
- ZMM5234B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-213AC, MINI-MELF, SOD-80
- Datasheet:
-
ZMM5234B-7.pdf
- Description:
- DIODE ZENER 6.2V 500MW MINI MELF
- Quantity:
- Payment:
- Shipping:
Inventory:4,026
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Product details
Overview
ZMM5234B-7 from Diodes Incorporated is a 500mW surface-mount Zener diode with nominal zener voltage 6.2V (5.89–6.51V range), 7.0Ω maximum zener impedance at 20mA, 4.0mW power rating at 25°C, and +0.045%/°C temperature coefficient - used for precision voltage reference and overvoltage protection in low-power analog sensor signal conditioning circuits.
For engineers reviewing the ZMM5234B-7 datasheet, ZMM5234B-7 pinout, ZMM5234B-7 application, or ZMM5234B-7 equivalent, key selection criteria include its MiniMELF glass package thermal resistance (300°C/W), cathode-band polarity marking, 1000Ω dynamic impedance at knee current, and stable operation across –65°C to +175°C junction temperature range.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage tolerance (±5% at 20mA) and low dynamic impedance (7.0Ω at IZT = 20mA), enabling accurate regulation in low-current bias networks. Its +0.045%/°C temperature coefficient ensures predictable drift under thermal variation, critical for reference stability in portable instrumentation.
The device uses hermetic glass MiniMELF (DO-213AA) packaging with solderable terminals per MIL-STD-202 Method 208, supporting reflow-compatible assembly while maintaining 500mW power dissipation capability at ambient temperatures up to +50°C per derating curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.2 V nominal, 5.89–6.51 V range at 20 mA - defines regulated output voltage under standard test conditions |
| Zener Impedance (ZZT) | 7.0 Ω max at 20 mA - determines AC ripple rejection and load regulation sensitivity |
| Power Dissipation (PD) | 500 mW at TA = 25°C - sets maximum continuous DC power handling before thermal runaway |
| Reverse Current (IR) | 5.0 µA max at VR = 4.0 V - specifies leakage level below breakdown, critical for high-impedance bias networks |
| Temp. Coefficient (TC) | +0.045 %/°C - quantifies voltage drift per degree Celsius, enabling thermal error budgeting in precision references |
| Junction Temp. Range | –65°C to +175°C - supports operation in automotive engine compartments and industrial control enclosures |
Pinout & Package
Package: MiniMELF (DO-213AA) - hermetic glass cylindrical case, 3.3–3.7 mm length (A), 1.3–1.6 mm diameter (B), 0.28–0.50 mm lead diameter (C); cathode identified by single band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reverse breakdown reference node | Connected to lower-potential side of bias network; establishes reference ground reference point in shunt regulator topology |
| Cathode | Zener breakdown terminal / Voltage regulation output node | Connected to regulated rail; provides stable 6.2V reference when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MiniMELF package | Enables reliable high-temperature operation (175°C max) and moisture resistance without conformal coating |
| Tight ±5% zener voltage tolerance | Reduces need for post-assembly trimming in factory calibration of analog front-ends |
| Low 7.0Ω dynamic impedance at 20mA | Minimizes output voltage deviation under varying load currents in reference supply rails |
| +0.045%/°C tempco | Supports <±10mV total drift over 0–70°C ambient range in unheated PCB layouts |
Applications
| Portable Sensor Reference | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: Providing stable 6.2V reference for 12-bit ADC biasing in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Shunt voltage reference for op-amp input stage and ADC reference divider network. Use Value: Enables <±0.5 LSB offset error over –20°C to +60°C due to tight tolerance and low tempco. |
Use Scenario: Clamping transient surges on 24V digital input channels of programmable logic controllers. IC Role / Device Role / Timing Role: Overvoltage protection element placed between field input and optocoupler input. Use Value: Limits voltage to 6.51V peak during ESD events, preventing optocoupler damage without adding series resistance. |
| Medical Wearable Power Monitor | Automotive Cabin Control Module |
|
Use Scenario: Regulating auxiliary 6.2V rail for low-noise LDO pre-regulation in heart-rate monitor SoCs. IC Role / Device Role / Timing Role: Pre-regulator for ultra-low-dropout linear regulator feeding analog sensor interface. Use Value: Delivers 500mW dissipation margin at 25°C ambient, allowing safe operation even with 15°C board rise. |
Use Scenario: Supplying reference voltage to window comparator circuit monitoring 12V battery health. IC Role / Device Role / Timing Role: Precision voltage threshold generator for undervoltage/overvoltage detection. Use Value: Maintains ±30mV accuracy over full –40°C to +125°C underhood temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C6V2-TR | 6.2V ±5%, 500mW, DO-35 package; RJA = 500°C/W vs 300°C/W for ZMM5234B-7 | Higher thermal resistance limits usable power at elevated ambient; less suitable for compact PCBs with limited airflow | Select when DO-35 footprint compatibility is required and board-level thermal management is robust |
| MMSZ5234B-7-F | 6.2V ±5%, 500mW, SOD-123 package; 1000Ω ZZK at 0.25mA vs 1000Ω at 5µA for ZMM5234B-7 | Higher knee impedance reduces low-current regulation accuracy; unsuitable for sub-100µA bias networks | Select when automated pick-and-place compatibility with SMD tape-and-reel is prioritized over low-IZ performance |
Compared with BZX55C6V2-TR and MMSZ5234B-7-F, ZMM5234B-7 delivers superior thermal performance in space-constrained layouts and tighter low-current regulation due to its MiniMELF geometry and verified 1000Ω knee impedance at 5µA.
Availability
ZMM5234B-7 is available at Aetrix Electronics and suitable for portable sensor reference, industrial PLC input protection, and medical wearable power monitor designs requiring stable component supply and traceable sourcing.
Supply support for ZMM5234B-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 manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and the U.S.
ZMM52xxB is part of Diodes' MiniMELF Zener diode product line, engineered for high-reliability voltage reference and clamping in space-constrained, thermally demanding applications such as automotive body electronics and industrial automation.
FAQ
What is the maximum reverse current for ZMM5234B-7 at 4.0V?
The maximum reverse current (IR) is 5.0 µA at VR = 4.0 V and TA = 25°C, as specified in the Electrical Characteristics table. This value reflects leakage behavior well below breakdown and is critical for ensuring minimal error in high-impedance voltage divider networks.
Can ZMM5234B-7 be used in reflow soldering processes?
Yes - the MiniMELF package meets MIL-STD-202 Method 208 for solderability, and Diodes' packaging supports standard Pb-free reflow profiles (peak 260°C, 10-second duration). Thermal resistance data confirms safe operation post-reflow if board layout maintains adequate copper clearance.
How does the +0.045%/°C temperature coefficient affect long-term stability?
This coefficient means the zener voltage increases by 0.045% per °C rise in junction temperature. At 6.2V, that equals +2.79mV/°C - so over a 50°C junction swing, total drift is ~139mV, which must be accommodated in system-level error budgets for precision references.
Is ZMM5234B-7 rated for automotive AEC-Q200 compliance?
No - ZMM5234B-7 is not AEC-Q200 qualified. While it operates from –65°C to +175°C, it lacks the stress testing, failure analysis, and qualification documentation required for automotive-grade use. For AEC-Q200 applications, consider Diodes' AZMM5234B variant.
ZMM5234B-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):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 4 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
ZMM5234B-7 FAQ
1.How can I place an order for ZMM5234B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZMM5234B-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 ZMM5234B-7 reliable?
The price and inventory of ZMM5234B-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZMM5234B-7 is usually 5 days.
3.What payment methods are accepted for ZMM5234B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZMM5234B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZMM5234B-7?
ZMM5234B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZMM5234B-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 ZMM5234B-7?
For technical support, including ZMM5234B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZMM5234B-7 requirements.
6.How does Aetrix verify that ZMM5234B-7 is sourced from the original manufacturer or authorized distributors?
All ZMM5234B-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 ZMM5234B-7 meets industry standards.
7.What is the process for return or replacement of ZMM5234B-7?
All ZMM5234B-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZMM5234B-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 ZMM5234B-7 part is unused and in its original packaging.
Return procedure for ZMM5234B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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