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ZMY30
Diotec Semiconductor
DIODE ZENER 30V 1.3W MELF
23962 Pcs New Original In Stock
Zener Diode 30 V 1.3 W ±5% Surface Mount MELF DO-213AB (Plastic)
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5.0 / 5.0
- (154 Ratings)
ZMY30
Product Overview
12944489
DiGi Electronics Part Number
ZMY30-DGManufacturer
Diotec Semiconductor
ZMY30
Description
DIODE ZENER 30V 1.3W MELFInventory
23962 Pcs New Original In Stock
Zener Diode 30 V 1.3 W ±5% Surface Mount MELF DO-213AB (Plastic)
Quantity
Minimum 1
Minimum 1
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ZMY30 Technical Specifications
Category
Diodes, Zener, Single Zener Diodes
Packaging
Tape & Reel (TR)
Series
-
Product Status
Active
Voltage - Zener (Nom) (Vz)
30 V
Tolerance
±5%
Power - Max
1.3 W
Impedance (Max) (Zzt)
8 Ohms
Current - Reverse Leakage @ Vr
1 µA @ 14 V
Operating Temperature
-50°C ~ 150°C (TJ)
Mounting Type
Surface Mount
Package / Case
DO-213AB, MELF
Supplier Device Package
MELF DO-213AB (Plastic)
Datasheet & Documents
Datasheets
Download ZMY30 Product Specification (PDF)
HTML Datasheet
ZMY30-DG
Environmental & Export Classification
RoHS Status
Not applicable
Moisture Sensitivity Level (MSL)
Not Applicable
REACH Status
Vendor Undefined
ECCN
EAR99
HTSUS
8541.10.0050
Additional Information
Other Names
2796-ZMY30TR
4878-ZMY30DKR
2796-ZMY30TR-DG
4878-ZMY30CT
4878-ZMY30TR
Standard Package
5,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
가격도 저렴하고, 고객 서비스도 정말 친절해서 추천하고 싶어요.
Dec 02, 2025
I am grateful for their proactive approach in supporting customers after sales.
Dec 02, 2025
Their pricing benefits small businesses like mine significantly.
Dec 02, 2025
The reliability of their service and products helps us uphold high standards for our clients.
Dec 02, 2025
Their customer support team is courteous, knowledgeable, and always willing to help.
Dec 02, 2025
The product quality is outstanding, exceeding my expectations every time I shop at DiGi Electronics.
Dec 02, 2025
Their support team is proactive and provides valuable insights post-sale.
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Frequently Asked Questions (FAQ)
What are the key design considerations when using the ZMY30 MELF zener diode in a high-temperature environment near its maximum junction rating?
When using the ZMY30 in environments approaching its 150°C max junction temperature, thermal dissipation becomes critical. The 1.3W power rating is derated above 25°C ambient, so ensure PCB copper layout provides adequate heat sinking, especially under continuous reverse bias. Use thermal vias and wide traces to improve conduction. Also, verify actual power dissipation in-circuit—especially in voltage regulation or overvoltage protection roles—since transient surges can push thermal limits even if average power seems acceptable. Avoid placing near heat-generating components to prevent thermal runaway risks.
Can the ZMY30 replace a BZT52C30 in a surface-mount power supply feedback loop, and what circuit adjustments might be needed?
Yes, the ZMY30 can generally replace the BZT52C30 in a feedback loop, but key differences must be addressed. The ZMY30 uses a MELF DO-213AB package, which has lower PCB adhesion and higher rolling risk than the BZT52C30's SOD-123 package. Adjust land patterns accordingly and consider adhesive for mechanical stability. Electrically, the ZMY30 has lower impedance (max 8 Ω vs ~10–15 Ω), which improves regulation but may increase noise sensitivity. Verify loop stability and transient response, especially in low-noise LDO designs, and assess long-term reliability under thermal cycling due to MELF's higher CTE mismatch.
How does the low dynamic impedance (8 Ω max) of the ZMY30 affect its performance in precision voltage reference circuits?
The ZMY30’s low Zzt (max 8 Ω) helps maintain stable voltage under varying load currents, making it suitable for non-precision regulation or reference buffering. However, with only ±5% tolerance at 30V, it’s not ideal for high-accuracy applications without calibration. For best results, pair the ZMY30 with a low-drift op-amp buffer and operate it at 5–10mA to stabilize the zener voltage. Avoid operation near the knee current (Izmin ~1mA) to prevent excessive voltage drift. Consider TC effects—MELF zeners like ZMY30 exhibit nonlinear tempcos near 30V, potentially increasing error over temperature swings.
What are the reliability risks of using the ZMY30 in automotive applications with frequent thermal cycling?
While the ZMY30 supports -50°C to 150°C operating range—suitable for automotive underhood use—its MELF DO-213AB package poses reliability concerns under thermal cycling due to cylindrical geometry and CTE mismatch with FR-4 PCBs. Cracking or solder joint fatigue can occur over thousands of cycles. Mitigate risks by following IPC-7095 MELF rework guidelines: use concave footprints, Ni/Au-plated pads for better adhesion, and avoid via-in-pads. Consider conformal coating to reduce thermo-mechanical stress. For mission-critical designs, prefer flat-leaded alternatives like SMAJ or evaluate qualified AEC-Q101 zeners for higher robustness.
How should I design current-limiting for the ZMY30 in a 30V transient suppression circuit to avoid exceeding its 1.3W power limit?
To protect the ZMY30 in a 30V transient suppression role, size the series current-limiting resistor to cap dissipation under worst-case overvoltage. For example, with a possible 40V transient, calculate R = (40V - 30V) / I, where I must keep P = Vz × I ≤ 1.3W (so Iz ≤ 43mA). A 220Ω resistor limits current to ~45.5mA at 40V, slightly exceeding rating—derate to 360mA max safely under normal loads. For repetitive transients, include capacitor filtering to reduce diode duty cycle. Also verify resistor pulse handling and consider a TVS diode upstream for high-energy spikes to extend ZMY30 lifespan.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
ZMY30 CAD Models
Diotec Semiconductor ZMY30 PCB symbols & footprints
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