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Diodes Incorporated ZMM5240B-7
- Part No.:
- ZMM5240B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-213AC, MINI-MELF, SOD-80
- Datasheet:
-
ZMM5240B-7.pdf
- Description:
- DIODE ZENER 10V 500MW MINI MELF
- Quantity:
- Payment:
- Shipping:
Inventory:6,786
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Product details
Overview
ZMM5240B-7 from Diodes Incorporated is a 10 V, 500 mW surface-mount Zener diode in MiniMELF (DO-213AA) glass package, rated for 20 mA test current, 17 Ω dynamic impedance at 20 mA, and +0.075 %/°C temperature coefficient. It provides precision voltage regulation in low-power analog references and overvoltage protection circuits operating from -65 °C to +175 °C.
For engineers reviewing the ZMM5240B-7 datasheet, ZMM5240B-7 pinout, ZMM5240B-7 application, or ZMM5240B-7 equivalent, key selection criteria include its 9.5–10.5 V zener voltage tolerance at 20 mA, 600 Ω maximum knee impedance at 0.25 mA, 3.0 µA maximum reverse leakage at 8.0 V, and thermal resistance of 300 °C/W in still air - critical for compact PCB designs with limited heatsinking.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its hemispheric glass MiniMELF package ensures hermetic sealing and reliable performance in harsh environments.
The device exhibits a positive temperature coefficient (+0.075 %/°C), indicating increasing zener voltage with rising junction temperature - a key consideration when used in temperature-sensitive bias networks or precision voltage monitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10.0 V nominal, 9.5–10.5 V range at IZT = 20 mA - defines regulated output voltage tolerance in reference circuits |
| Zener Impedance (ZZT) | 17 Ω max at IZT = 20 mA - determines output voltage stability under load current variation |
| Knee Impedance (ZZK) | 600 Ω max at IZK = 0.25 mA - indicates regulation onset sharpness at low current, critical for standby-mode references |
| Reverse Leakage (IR) | 3.0 µA max at VR = 8.0 V - limits quiescent power loss in high-impedance bias networks |
| Power Dissipation (PD) | 500 mW at TA = 25 °C - sets maximum continuous DC power handling without forced cooling |
| Temp. Coefficient (TC) | +0.075 %/°C - quantifies drift rate of VZ per degree Celsius rise, essential for thermal error budgeting |
Pinout & Package
MiniMELF (DO-213AA) glass package: cylindrical hermetic construction with cathode band marking; terminals are solderable per MIL-STD-202, Method 208; dimensions A = 3.30–3.70 mm, B = 1.30–1.60 mm, C = 0.28–0.50 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reverse breakdown reference ground node | Connected to circuit common or lower-potential rail; forms reference return path in shunt regulator topology |
| Cathode | Zener voltage output terminal / Reverse-biased anode | Provides regulated 10 V output relative to anode; marked by visible cathode band on glass body |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass packaging | Ensures long-term parameter stability and moisture resistance in automotive and industrial environments |
| Low thermal resistance (300 °C/W) | Enables operation up to +175 °C ambient without derating in thermally constrained layouts |
| Tight VZ tolerance (±5 %) | Reduces need for post-assembly trimming in production-grade voltage references |
| Controlled positive TC (+0.075 %/°C) | Allows predictable compensation when paired with negative-TC components in bandgap-like references |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module Reference |
|---|---|
Use Scenario: Stabilizing excitation voltage for bridge-based pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Shunt voltage reference providing 10 V bias to sensor Wheatstone bridge. Use Value: ±5 % VZ tolerance and +0.075 %/°C TC enable <1.2 % total error over -40 to +125 °C operating range. |
Use Scenario: Generating stable reference for microcontroller ADC in door module ECU. IC Role / Device Role / Timing Role: Low-power voltage clamp regulating internal 10 V rail for analog front-end calibration. Use Value: 3.0 µA leakage at 8 V minimizes battery drain during sleep mode; MiniMELF withstands reflow and vibration stress. |
| Medical Portable Device Power Supervision | Telecom Line Card Overvoltage Protection |
Use Scenario: Monitoring Li-ion battery pack voltage via resistive divider with precision reference. IC Role / Device Role / Timing Role: Zener-based reference for comparator threshold in low-voltage cutoff circuit. Use Value: 17 Ω ZZT ensures <50 mV threshold shift across 0–10 mA load variation, improving shutdown repeatability. |
Use Scenario: Clamping transient surges on 12 V backplane rails in modular telecom switches. IC Role / Device Role / Timing Role: Standby-mode shunt protector absorbing short-duration spikes before TVS activation. Use Value: 500 mW rating and 300 °C/W RJA allow sustained 10 V clamping at 50 mA without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C10 (ON Semiconductor) | Same 10 V nominal, but ±5 % tolerance, 20 Ω ZZT, DO-35 package (larger, axial lead) | Requires through-hole mounting and higher board area; less suitable for automated SMT lines | Choose for legacy through-hole designs where MiniMELF footprint is incompatible |
| MMSZ5240ET1G (onsemi) | SOD-123 package, same 10 V/±5 %, but 22 Ω ZZT, 500 mW rating, and +0.07 %/°C TC | Lower profile (1.3 mm height vs MiniMELF's 3.5 mm), better for ultra-thin assemblies | Prefer when board height is constrained and DO-213AA curvature poses assembly challenges |
Compared with BZX55C10 and MMSZ5240ET1G, ZMM5240B-7 offers superior thermal resistance (300 °C/W vs ~500 °C/W for SOD-123 and ~400 °C/W for DO-35) and tighter TC matching in high-temperature industrial deployments, while retaining SMT compatibility.
Availability
ZMM5240B-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive body control modules, medical portable device power supervision, and telecom line card overvoltage protection requiring stable component supply across extended temperature ranges.
Supply support for ZMM5240B-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 design and manufacturing operations across Asia and the Americas.
ZMM52xxB series belongs to Diodes' precision Zener diode product line, engineered for high-reliability voltage reference and regulation in automotive, industrial, and medical applications demanding tight tolerance and stable TC.
FAQ
What is the maximum continuous reverse current the ZMM5240B-7 can sustain without degradation?
The ZMM5240B-7 is rated for 20 mA test current (IZT) and 500 mW power dissipation at 25 °C ambient. At 10 V, this corresponds to 50 mA absolute maximum DC current before exceeding PD. However, sustained operation above 20 mA requires thermal derating per the power vs. ambient temperature curve - at 100 °C ambient, max current drops to ~33 mA.
Does the ZMM5240B-7 have a specified junction capacitance value?
No junction capacitance (Cj) is specified for ZMM5240B-7 in the official datasheet. Figure 2 shows typical Cj vs. VZ for the full ZMM52xxB family, estimating ~12 pF at 2 V reverse bias for 10 V devices, but this is not a guaranteed parameter and varies with test conditions and unit-to-unit.
Can ZMM5240B-7 be used in forward-bias applications like standard diodes?
Yes - it exhibits 1.5 V forward voltage at 200 mA, consistent with silicon PN junction behavior. However, its forward characteristics are not characterized or guaranteed beyond this single point; it is optimized and tested exclusively for reverse-breakdown operation as a voltage reference.
Is the cathode band orientation standardized across MiniMELF Zeners from different manufacturers?
Yes - per JEDEC DO-213AA, the cathode band is always applied to the end of the glass cylinder opposite the rounded tip. For ZMM5240B-7, the band marks the cathode terminal, and this orientation is consistent across Diodes Inc., Vishay, and ON Semiconductor MiniMELF Zeners.
ZMM5240B-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):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 8 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
ZMM5240B-7 FAQ
1.How can I place an order for ZMM5240B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZMM5240B-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 ZMM5240B-7 reliable?
The price and inventory of ZMM5240B-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZMM5240B-7 is usually 5 days.
3.What payment methods are accepted for ZMM5240B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZMM5240B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZMM5240B-7?
ZMM5240B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZMM5240B-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 ZMM5240B-7?
For technical support, including ZMM5240B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZMM5240B-7 requirements.
6.How does Aetrix verify that ZMM5240B-7 is sourced from the original manufacturer or authorized distributors?
All ZMM5240B-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 ZMM5240B-7 meets industry standards.
7.What is the process for return or replacement of ZMM5240B-7?
All ZMM5240B-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZMM5240B-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 ZMM5240B-7 part is unused and in its original packaging.
Return procedure for ZMM5240B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZMM5240B-7 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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