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ZMY20
Diotec Semiconductor
ZENERDIODE,MELF,20V,1.3W,5%
23898 Pcs New Original In Stock
Zener Diode 20 V 1.3 W ±5% Surface Mount MELF DO-213AB
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Minimum 1
5.0 / 5.0
- (37 Ratings)
ZMY20
Product Overview
12944406
DiGi Electronics Part Number
ZMY20-DGManufacturer
Diotec Semiconductor
ZMY20
Description
ZENERDIODE,MELF,20V,1.3W,5%Inventory
23898 Pcs New Original In Stock
Zener Diode 20 V 1.3 W ±5% Surface Mount MELF DO-213AB
Quantity
Minimum 1
Minimum 1
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ZMY20 Technical Specifications
Category
Diodes, Zener, Single Zener Diodes
Packaging
Strip
Series
-
Product Status
Active
Voltage - Zener (Nom) (Vz)
20 V
Tolerance
±5%
Power - Max
1.3 W
Impedance (Max) (Zzt)
6 Ohms
Current - Reverse Leakage @ Vr
1 µA @ 10 V
Operating Temperature
-50°C ~ 150°C (TJ)
Mounting Type
Surface Mount
Package / Case
DO-213AB, MELF
Supplier Device Package
MELF DO-213AB
Datasheet & Documents
Datasheets
Download ZMY20 Product Specification (PDF)
HTML Datasheet
ZMY20-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Additional Information
Other Names
2721-ZMY20
Standard Package
30
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Leur efficacité logistique est remarquable, tout s'est déroulé à la perfection.
Dec 02, 2025
DiGi Electronics' support staff is friendly, efficient, and solutions-oriented.
Dec 02, 2025
DiGi Electronics’ products show excellent resilience, even after repeated installations and removals in my circuit setups.
Dec 02, 2025
Their customer service team is friendly, professional, and highly responsive.
Dec 02, 2025
Speedy delivery is a significant advantage for us.
Dec 02, 2025
Their equipment performs flawlessly, and I trust their reliability for our critical operations.
Dec 02, 2025
I love how affordable their products are, making electronics more accessible.
Dec 02, 2025
Fast shipping and exceptional after-sales service made this a great purchase experience.
Dec 02, 2025
Prompt shipping combined with eco-friendly packaging makes this a standout retailer.
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Frequently Asked Questions (FAQ)
When designing in the ZMY20 Zener diode, how do I ensure thermal stability under sustained power dissipation in a high-temperature environment near 125°C?
When using the ZMY20 in environments up to 125°C, derate the power dissipation accordingly—since the ZMY20 has a maximum power rating of 1.3 W at 25°C, its dissipation must be reduced linearly above this temperature, typically at 10.4 mW/°C, to avoid exceeding junction limits. Ensure adequate PCB copper area for heat dissipation, especially in MELF DO-213AB packaging, which has limited thermal mass. For sustained operation near 125°C, consider operating the ZMY20 at no more than 50–60% of rated power to maintain reliability and avoid thermal runaway, particularly in enclosed or convection-limited enclosures.
Can the ZMY20 replace a BZX85C20 in a legacy through-hole design being migrated to surface mount, and what are the key performance differences?
The ZMY20 can serve as a surface-mount alternative to the through-hole BZX85C20 in many applications, but key differences must be addressed: the ZMY20 is a 1.3 W MELF device with ±5% tolerance and 6 Ω max Zzt, while the BZX85C20 is a 1.3 W axial device with similar specs but higher thermal inertia. The ZMY20's MELF package has lower thermal mass and may require enhanced PCB layout for comparable heat dissipation. Additionally, reflow soldering profiles must be carefully controlled for the MELF DO-213AB package to avoid tombstoning. Verify that the lower surge current capability of the ZMY20 is acceptable for your transient exposure.
What design risks arise when using the ZMY20 for voltage regulation in a low-current circuit where operating current is near the knee of the Zener curve?
When using the ZMY20 in low-current applications, operating near the Zener knee (typically below 1–2 mA) can result in poor voltage regulation due to increased impedance and variance from nominal 20 V. The ZMY20 is specified at a test current (IZT) of 5.0 mA; operating significantly below this current increases Zzt beyond the 6 Ω max spec and reduces accuracy. To mitigate this, ensure the circuit maintains a minimum of 3–5 mA through the ZMY20, or consider a lower Zener current device like the MMSZ5247B if current budget is constrained.
How does the dynamic impedance of the ZMY20 affect its performance in noise-sensitive analog reference circuits?
The ZMY20 has a maximum impedance (Zzt) of 6 Ω at 5.0 mA, which may introduce unacceptable noise or ripple in precision analog references, especially in high-gain or low-noise amplifier circuits. While acceptable for general regulation, the ZMY20 is less suitable than low-noise Zeners or shunt references like the LM385-2.5 or LTZ1000 for sensitive applications. If using the ZMY20, stabilize noise by adding a bypass capacitor (e.g., 1–10 µF ceramic + 100 nF in parallel) and consider operating at the upper end of its current range to minimize dynamic impedance.
Is the ZMY20 suitable for use in automotive under-hood applications, and what reliability concerns should be addressed with the MELF package?
The ZMY20 is suitable for automotive under-hood use due to its wide operating temperature range of -50°C to 150°C and RoHS3 compliance, aligning with AEC standards for temperature. However, the MELF DO-213AB package poses reliability risks in high-vibration environments due to its cylindrical shape and potential for poor solder joint adhesion. To mitigate mechanical stress and cracking, use adhesive bonding, optimized pad design with solder dams, and avoid placement near board edges. Consider alternative flat-pack Zeners like the BZT52C20 in SOD-123 for better mechanical robustness if vibration is a primary concern.
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.
ZMY20 CAD Models
Diotec Semiconductor ZMY20 PCB symbols & footprints
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