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Diodes Incorporated ZMM5260B-7
- Part No.:
- ZMM5260B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-213AC, MINI-MELF, SOD-80
- Datasheet:
-
ZMM5260B-7.pdf
- Description:
- DIODE ZENER 43V 500MW MINI MELF
- Quantity:
- Payment:
- Shipping:
Inventory:4,157
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Product details
Overview
ZMM5260B-7 from Diodes Incorporated is a 43 V, 3.0 mA nominal zener current, 93 Ω dynamic impedance (at IZT), 500 mW surface-mount zener diode in MiniMELF (DO-213AA) package, used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the ZMM5260B-7 datasheet, ZMM5260B-7 pinout, ZMM5260B-7 application, or ZMM5260B-7 equivalent, key selection criteria include zener voltage tolerance (±5%), temperature coefficient (+0.095 %/°C), low leakage (<0.1 µA at 33 V), thermal resistance (300 °C/W), and MiniMELF mechanical compatibility with automated placement.
Technical Context
This device operates as a two-terminal voltage regulator in reverse-biased mode, maintaining stable 43 V output across load variations when biased at 3.0 mA. Its hemispheric glass MiniMELF package ensures hermetic sealing and high reliability under thermal cycling.
The zener exhibits +0.095 %/°C temperature coefficient above 6 V, enabling predictable drift compensation in reference circuits. Junction capacitance is ~12 pF at 2 V reverse bias, supporting moderate-frequency noise filtering without parasitic resonance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 43 V nominal, 40.85–45.15 V range at 3.0 mA - defines regulated output level in shunt references |
| Power Dissipation | 500 mW - sets maximum continuous DC or pulsed power handling in ambient air |
| Zener Impedance (ZZT) | 93 Ω at IZT = 3.0 mA - determines regulation stiffness and AC ripple rejection |
| Reverse Leakage (IR) | <0.1 µA at VR = 33 V - ensures minimal quiescent current in standby protection circuits |
| Temp Coefficient | +0.095 %/°C - quantifies voltage drift per degree Celsius above 25 °C ambient |
| Thermal Resistance | 300 °C/W junction-to-ambient - governs temperature rise under full power in still air |
| Forward Voltage | 1.5 V at IF = 200 mA - relevant for polarity verification and ESD-safe handling |
Pinout & Package
MiniMELF (DO-213AA) glass-encapsulated cylindrical package with axial cathode band marking; no discrete pins - terminals are solderable end caps per MIL-STD-202, Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current sink in forward bias / reference ground node in shunt regulator | Connected to system ground or lower-potential rail; enables forward conduction test |
| Cathode (banded end) | Regulated output node / voltage reference point | Connected to feedback node of switching regulator IC; defines 43 V reference potential |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage regulation | ±5% tolerance at 43 V with tight 40.85–45.15 V min/max spread - supports ±1% output accuracy in isolated flyback supplies |
| Low thermal resistance | 300 °C/W - allows 500 mW operation up to +125 °C ambient without derating in open-frame designs |
| Hermetic glass construction | DO-213AA outline with hemispheric seal - prevents moisture ingress and parameter shift in humid industrial environments |
| Stable temperature coefficient | +0.095 %/°C - enables predictable drift modeling for temperature-compensated reference networks |
Applications
| Switching Power Supply Feedback | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Used in TL431-based optocoupler feedback loop of 48 V input DC-DC converter. IC Role / Device Role / Timing Role: Zener provides precise 43 V reference to set output voltage threshold before TL431 activation. Use Value: Enables ±1.5% output regulation across -40 to +85 °C due to stable VZ and known tempco. | Use Scenario: Placed across motor driver H-bridge output to suppress inductive kick during turn-off. IC Role / Device Role / Timing Role: Clamps transient spikes above 43 V to protect MOSFET gate oxide and logic inputs. Use Value: Limits peak voltage to 45.15 V (max VZ) with <0.1 µA leakage, minimizing standby loss. |
| Industrial Sensor Reference | Programmable Logic Controller Input Protection |
Use Scenario: Supplies excitation voltage to 4–20 mA current-loop pressure transducer. IC Role / Device Role / Timing Role: Acts as shunt reference for DAC-controlled current source, setting loop compliance. Use Value: Delivers 43 V with 93 Ω ZZT, ensuring <0.5% error contribution under 1 mA load variation. | Use Scenario: Connected between PLC analog input channel and ground to absorb ESD and surge events. IC Role / Device Role / Timing Role: Fast-acting clamp that conducts only above 43 V, preserving signal integrity below threshold. Use Value: Withstands 100 ms pulses per spec, limiting clamping voltage to ≤45.15 V while drawing <0.1 µA at 33 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55-C43 (Vishay) | Same 43 V nominal, but ±5% tolerance, higher ZZT = 120 Ω, DO-35 package | Through-hole mounting required; less suitable for high-density SMT layouts | Select if legacy through-hole assembly or higher surge robustness needed |
| MMSZ5260B (ON Semiconductor) | Identical 43 V rating, same MiniMELF package, but ZZT = 100 Ω and TC = +0.095 %/°C | Functionally interchangeable with identical thermal and electrical envelope | Preferred for second-source continuity where Diodes Inc. supply is constrained |
Compared with BZX55-C43 and MMSZ5260B, ZMM5260B-7 offers the lowest zener impedance (93 Ω) among MiniMELF 43 V devices and tighter thermal resistance control (300 °C/W), making it optimal for space-constrained, high-accuracy shunt references.
Availability
ZMM5260B-7 is available at Aetrix Electronics and suitable for switching power supply feedback, overvoltage clamp protection, and industrial sensor reference applications requiring stable component supply and long-term parametric consistency.
Supply support for ZMM5260B-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 and manufacturing operations across Asia and the Americas.
ZMM5221B–ZMM5267B series belongs to Diodes' precision zener diode product line, engineered for stable voltage reference and protection in compact, high-reliability power systems.
FAQ
What is the maximum reverse voltage this zener can withstand before breakdown?
The ZMM5260B-7 has a nominal zener voltage of 43 V, with a guaranteed range of 40.85 V to 45.15 V at 3.0 mA test current. It begins controlled avalanche conduction at the lower bound and maintains regulation up to its rated power limit; sustained reverse voltage beyond 45.15 V risks thermal runaway if power dissipation exceeds 500 mW.
Can this diode be used in place of a 42 V or 44 V zener?
No - ZMM5260B-7 is specifically characterized and binned for 43 V regulation. Substituting with 42 V or 44 V parts introduces ≥2.3% error in reference voltage, which may violate output accuracy specs in feedback circuits. Its ±5% tolerance does not extend coverage to adjacent nominal values.
Is the MiniMELF package compatible with standard SMT reflow profiles?
Yes - the MiniMELF (DO-213AA) package is qualified for lead-free reflow per J-STD-020, with peak temperatures up to 260 °C. Its glass body withstands thermal shock, and the solderable end caps meet MIL-STD-202, Method 208, ensuring reliable joint formation in Type II and III reflow profiles.
How does temperature affect regulation accuracy in real-world operation?
At 43 V, the device exhibits +0.095 %/°C temperature coefficient. Over a 100 °C ambient range (−40 to +60 °C), this yields ~9.5 V drift - but actual shift is linear and predictable, enabling calibration offset correction. Regulation remains stable within datasheet limits as long as power dissipation stays ≤500 mW and junction temperature stays ≤175 °C.
ZMM5260B-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):
- 43 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 93 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 33 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
ZMM5260B-7 FAQ
1.How can I place an order for ZMM5260B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZMM5260B-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 ZMM5260B-7 reliable?
The price and inventory of ZMM5260B-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZMM5260B-7 is usually 5 days.
3.What payment methods are accepted for ZMM5260B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZMM5260B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZMM5260B-7?
ZMM5260B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZMM5260B-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 ZMM5260B-7?
For technical support, including ZMM5260B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZMM5260B-7 requirements.
6.How does Aetrix verify that ZMM5260B-7 is sourced from the original manufacturer or authorized distributors?
All ZMM5260B-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 ZMM5260B-7 meets industry standards.
7.What is the process for return or replacement of ZMM5260B-7?
All ZMM5260B-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZMM5260B-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 ZMM5260B-7 part is unused and in its original packaging.
Return procedure for ZMM5260B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZMM5260B-7 Tags
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