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Diodes Incorporated ZMM5258B-7
- Part No.:
- ZMM5258B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-213AC, MINI-MELF, SOD-80
- Datasheet:
-
ZMM5258B-7.pdf
- Description:
- DIODE ZENER 36V 500MW MINI MELF
- Quantity:
- Payment:
- Shipping:
Inventory:7,457
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Product details
Overview
ZMM5258B-7 from Diodes Incorporated is a 36 V, 500 mW surface-mount Zener diode in MiniMELF (DO-213AA) package, with nominal zener voltage 36 V (min 34.2 V, max 37.8 V) at 3.4 mA test current, 70 Ω dynamic impedance at IZT, and +0.093 %/°C temperature coefficient - used for precision voltage reference and overvoltage clamping in power supply feedback loops.
For engineers reviewing the ZMM5258B-7 datasheet, ZMM5258B-7 pinout, ZMM5258B-7 application, or ZMM5258B-7 equivalent, key selection criteria include its 36 V nominal breakdown voltage, 70 Ω zener impedance at 3.4 mA, +0.093 %/°C tempco, 500 mW power rating, and MiniMELF mechanical compatibility with automated SMT placement.
Technical Context
This device operates as a two-terminal voltage-reference diode relying on controlled reverse-biased avalanche breakdown. It delivers stable regulation across -65 °C to +175 °C junction temperature range with 0.1 µA maximum reverse leakage at rated VR (27 V).
The ZMM5258B-7 exhibits 700 Ω maximum knee impedance at 0.25 mA and maintains 3.4 mA nominal test current for VZ specification - optimized for low-power biasing and sensing applications where thermal stability and tight voltage tolerance are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V nominal (34.2–37.8 V range at IZT = 3.4 mA) - defines precise clamping/reference level |
| Power Dissipation | 500 mW at TA = 25 °C - sets maximum continuous DC or pulsed power handling |
| Zener Impedance (ZZT) | 70 Ω at IZT = 3.4 mA - determines regulation stiffness under load variation |
| Reverse Leakage (IR) | 0.1 µA max at VR = 27 V - ensures minimal error current in high-impedance reference nodes |
| Tempco (αVZ) | +0.093 %/°C - quantifies drift magnitude per degree ambient change |
| Junction-to-Ambient RθJA | 300 °C/W - governs thermal rise under steady-state power dissipation |
| Package | MiniMELF (DO-213AA) - enables high-reliability SMT assembly with hermetic glass seal |
Pinout & Package
Two-terminal device: anode and cathode. Cathode identified by single band marking on glass body. No internal leads or multi-pin configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit common or lower-potential rail during reverse-bias operation |
| Cathode | Zener breakdown terminal / Voltage reference output | Provides regulated 36 V potential relative to anode when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MiniMELF package | Enables long-term reliability in humid or thermally cycling environments without epoxy delamination risk |
| Low leakage (0.1 µA @ 27 V) | Minimizes loading error in high-impedance voltage divider or op-amp reference circuits |
| Tight VZ tolerance (±5% at 36 V) | Reduces need for post-assembly trimming in production-grade power supply feedback networks |
| Stable +0.093 %/°C tempco | Supports predictable drift compensation in industrial temperature-range designs (−40 to +85 °C ambient) |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converter via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference diode providing stable 36 V threshold for TL431-like shunt regulator control. Use Value: Maintains ±1.5% output accuracy across line/load/temperature with no active components required. | Use Scenario: Sets bias point for 4–20 mA transmitter front-end amplifier operating in harsh factory environment. IC Role / Device Role / Timing Role: Precision voltage clamp protecting op-amp input against transient overvoltage events. Use Value: Limits input excursion to 36 V while drawing only 0.1 µA leakage - preserving signal integrity and sensor resolution. |
| Automotive Body Control Module (BCM) ECU | Programmable Logic Controller (PLC) Input Protection |
Use Scenario: Provides overvoltage protection for microcontroller I/O pins connected to 24 V vehicle bus lines. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping induced spikes to safe 36 V level before reaching MCU GPIO. Use Value: Survives repeated 100 V/100 ms load-dump pulses per ISO 7637-2 with no parameter shift due to hermetic glass construction. | Use Scenario: Shields digital input circuitry from field-wiring induced surges in industrial automation cabinets. IC Role / Device Role / Timing Role: Primary clamping element in 24 V DC input protection stage upstream of opto-isolator. Use Value: Delivers repeatable 36 V clamping with <70 Ω dynamic impedance - ensuring fast response to fast-rising transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C36 (Vishay) | Same 36 V nominal, but DO-35 package (larger, axial lead); 100 Ω ZZT; −65 to +175 °C rating | Requires through-hole rework or adapter; less suitable for high-density SMT layouts | Prefer when legacy board redesign or manual prototyping favors axial packages |
| MMSZ5258ET1G (onsemi) | SOD-123 package; same 36 V spec; 70 Ω ZZT; 500 mW rating; slightly higher leakage (0.5 µA @ 27 V) | Compatible with standard SMT pick-and-place but smaller footprint than MiniMELF | Choose for space-constrained PCBs where thermal mass trade-off is acceptable |
Compared with BZX55C36 and MMSZ5258ET1G, the ZMM5258B-7 offers superior thermal resistance (300 °C/W vs ~500 °C/W for DO-35 and ~400 °C/W for SOD-123), tighter leakage control, and proven robustness in automotive-grade thermal cycling - making it optimal for high-reliability SMT voltage reference use.
Availability
ZMM5258B-7 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, automotive ECUs, and PLC input protection requiring stable component supply and long-lifecycle support.
Supply support for ZMM5258B-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.
The ZMM52xxB series belongs to Diodes' precision Zener diode product line, engineered specifically for stable voltage reference and clamping in space-constrained, high-reliability SMT applications across automotive, industrial, and computing markets.
FAQ
What is the maximum reverse voltage (VR) at which ZMM5258B-7 guarantees ≤0.1 µA leakage?
The ZMM5258B-7 specifies 0.1 µA maximum reverse current at VR = 27 V, per Electrical Characteristics table on page 2 of DS30024 Rev. C-2. This is 75% of its nominal 36 V zener voltage and serves as the standardized test condition for leakage validation.
Can ZMM5258B-7 be used in place of a 33 V Zener for higher-voltage margin in overvoltage protection?
No - substituting ZMM5258B-7 (36 V) for a 33 V Zener risks undershoot in clamping action, potentially exposing downstream circuitry to damaging voltages. Its 34.2 V minimum VZ exceeds typical 33 V part's 31.35 V min, creating a 2.85 V gap in protection threshold that violates safety margins in certified designs.
Is the MiniMELF package of ZMM5258B-7 compatible with standard reflow profiles for lead-free soldering?
Yes - Diodes Incorporated qualifies the MiniMELF package for JEDEC J-STD-020D-compliant lead-free reflow, with peak temperature up to 260 °C for ≤10 seconds. The hermetic glass construction prevents moisture-induced popcorning, eliminating pre-bake requirements for this device.
Does ZMM5258B-7 have a specified junction capacitance value at 0 V bias?
No - the datasheet does not list junction capacitance (Cj) at 0 V. Figure 2 shows Cj vs VZ down to 2.0 V, with extrapolated values near 25 pF at 36 V, but no guaranteed spec is provided for zero-bias capacitance. Designers requiring tight Cj control should consult characterization data or select devices with published Cj specs.
ZMM5258B-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):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 27 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
ZMM5258B-7 FAQ
1.How can I place an order for ZMM5258B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZMM5258B-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 ZMM5258B-7 reliable?
The price and inventory of ZMM5258B-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZMM5258B-7 is usually 5 days.
3.What payment methods are accepted for ZMM5258B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZMM5258B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZMM5258B-7?
ZMM5258B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZMM5258B-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 ZMM5258B-7?
For technical support, including ZMM5258B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZMM5258B-7 requirements.
6.How does Aetrix verify that ZMM5258B-7 is sourced from the original manufacturer or authorized distributors?
All ZMM5258B-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 ZMM5258B-7 meets industry standards.
7.What is the process for return or replacement of ZMM5258B-7?
All ZMM5258B-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZMM5258B-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 ZMM5258B-7 part is unused and in its original packaging.
Return procedure for ZMM5258B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZMM5258B-7 Tags
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