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ZY33
Diotec Semiconductor
ZENER DO41 33V 2W 5%
18134 Pcs New Original In Stock
Zener Diode 33 V 2 W ±5% Through Hole DO-41/DO-204AC
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5.0 / 5.0
- (182 Ratings)
ZY33
Product Overview
12944920
DiGi Electronics Part Number
ZY33-DGManufacturer
Diotec Semiconductor
ZY33
Description
ZENER DO41 33V 2W 5%Inventory
18134 Pcs New Original In Stock
Zener Diode 33 V 2 W ±5% Through Hole DO-41/DO-204AC
Quantity
Minimum 1
Minimum 1
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ZY33 Technical Specifications
Category
Diodes, Zener, Single Zener Diodes
Packaging
Tape & Reel (TR)
Series
-
Product Status
Active
Voltage - Zener (Nom) (Vz)
33 V
Tolerance
±5%
Power - Max
2 W
Impedance (Max) (Zzt)
8 Ohms
Current - Reverse Leakage @ Vr
1 µA @ 17 V
Operating Temperature
-50°C ~ 150°C (TJ)
Mounting Type
Through Hole
Package / Case
DO-204AC, DO-41, Axial
Supplier Device Package
DO-41/DO-204AC
Datasheet & Documents
Datasheets
Download ZY33 Product Specification (PDF)
HTML Datasheet
ZY33-DG
Environmental & Export Classification
RoHS Status
Not applicable
Moisture Sensitivity Level (MSL)
Not Applicable
REACH Status
Vendor Undefined
HTSUS
8541.10.0000
Additional Information
Other Names
2796-ZY33TR
Standard Package
5,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
포장 품질이 뛰어나서 제품이 안전하게 도착했고, 배송 상태도 실시간으로 알 수 있어 편리합니다.
Dec 02, 2025
DiGi Electronics的產品值得投資，品質穩定，售後又周到。
Dec 02, 2025
Mit der zuverlässigen Versandverfolgung fühle ich mich sicher bei jeder Bestellung.
Dec 02, 2025
Affordable prices combined with consistent product quality make DiGi Electronics my go-to brand.
Dec 02, 2025
Delivery was punctual, and the logistics process was clearly well-managed.
Dec 02, 2025
Their product reliability has exceeded my expectations considering how affordable they are.
Dec 02, 2025
The staff was very welcoming and eager to help with any questions I had.
Dec 02, 2025
Post-sales support from DiGi Electronics is top-notch; they provide helpful guidance every step of the way.
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Frequently Asked Questions (FAQ)
What are the key reliability risks when using the ZY33 Zener diode in high-temperature industrial environments near its 150°C junction limit?
The ZY33 is rated for -50°C to 150°C operation, but sustained operation near 150°C significantly accelerates thermal degradation of the silicon junction and solder joints. At elevated temperatures, leakage current increases exponentially, potentially causing thermal runaway in poorly heatsinked designs. For industrial applications exceeding 125°C ambient, consider derating power to ≤1W and adding a thermal pad or heatsink. Monitor long-term drift in precision regulation circuits—electromigration and dopant diffusion can shift the 33V Zener voltage over time under high-TJ stress.
Can I replace a BZX84-C33 or MMSZ33-TP with the ZY33 in a surface-mount 3.3V rail protection circuit, and what design changes are needed?
No—direct replacement is not recommended. The ZY33 is a through-hole DO-41 package with 2W power handling, while the BZX84-C33 (SOT-23, 300mW) and MMSZ33-TP (SOD-123, 500mW) are surface-mount, lower-power devices. Using the ZY33 in an SMD layout would require PCB rework, increased board area, and thermal management for its higher dissipation. Additionally, the ZY33’s 8Ω dynamic impedance is higher than the BZX84-C33’s (~2Ω), leading to poorer transient response. Only consider substitution if upgrading to higher surge capability and willing to redesign the footprint and thermal path.
How does the ZY33’s 8Ω dynamic impedance affect voltage regulation accuracy in a 33V reference circuit under varying load currents?
The ZY33’s 8Ω Zzt means that for every 12.5mA of load current variation, the regulated voltage can shift by up to 100mV (ΔV = I × Zzt). In precision applications like ADC references or feedback networks, this introduces measurable error. To mitigate, use the ZY33 in a low-current buffer configuration with an op-amp or ensure load current remains stable within ±5mA. For tighter regulation (<0.5%), consider lower-impedance alternatives like the 1N5359B (5Ω typ) or active regulation with a dedicated reference IC.
What derating strategy should I apply for the ZY33 when used in automotive under-hood applications with ambient temperatures reaching 110°C?
At 110°C ambient, the ZY33’s 2W rating must be heavily derated due to limited heatsinking in axial packages. Assuming natural convection and no additional cooling, derate power linearly to ~0.6W at 110°C (per typical derating curves: ~6mW/°C above 25°C). This limits continuous Zener current to ~18mA at 33V. For transient loads or surge protection, ensure peak power stays below 2W with adequate pulse width (<1ms). Always validate with thermal imaging during prototyping—hotspots on the leads or body indicate insufficient margin.
Is the ZY33 suitable for reverse polarity protection in a 24V industrial power supply, and how does its leakage current impact standby power consumption?
The ZY33 is not ideal for reverse polarity protection due to its 1µA reverse leakage at 17V—this rises significantly near breakdown and at high temperatures. In a 24V system, even small leakage can waste tens of µA continuously, impacting battery-backed or low-power standby modes. More importantly, Zener diodes aren’t designed for sustained reverse-blocking like TVS or blocking diodes. For reverse polarity, use a series Schottky (e.g., 1N5819) or MOSFET-based solution. Reserve the ZY33 for voltage clamping or regulation where its 33V breakdown is actively utilized, not passive blocking.
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.
ZY33 CAD Models
Diotec Semiconductor ZY33 PCB symbols & footprints
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