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ZM4750A-GS18
Vishay General Semiconductor - Diodes Division
DIODE ZENER 27V 1W DO213AB
150373 Pcs New Original In Stock
Zener Diode 27 V 1 W ±5% Surface Mount DO-213AB
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5.0 / 5.0
- (215 Ratings)
ZM4750A-GS18
Product Overview
12786408
DiGi Electronics Part Number
ZM4750A-GS18-DGManufacturer
Vishay General Semiconductor - Diodes Division
ZM4750A-GS18
Description
DIODE ZENER 27V 1W DO213ABInventory
150373 Pcs New Original In Stock
Zener Diode 27 V 1 W ±5% Surface Mount DO-213AB
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
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ZM4750A-GS18 Technical Specifications
Category
Diodes, Zener, Single Zener Diodes
Packaging
Tape & Reel (TR)
Series
-
Product Status
Active
Voltage - Zener (Nom) (Vz)
27 V
Tolerance
±5%
Power - Max
1 W
Impedance (Max) (Zzt)
35 Ohms
Current - Reverse Leakage @ Vr
5 µA @ 20.6 V
Operating Temperature
175°C
Grade
Automotive
Qualification
AEC-Q101
Mounting Type
Surface Mount
Package / Case
DO-213AB, MELF (Glass)
Supplier Device Package
DO-213AB
Base Product Number
ZM4750
Datasheet & Documents
HTML Datasheet
ZM4750A-GS18-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.10.0050
Additional Information
Other Names
112-ZM4750A-GS18DKRINACTIVE
112-ZM4750A-GS18DKR-DG
112-ZM4750A-GS18DKR
ZM4750A-GS18GITR
ZM4750A-GS18-DG
ZM4750AGS18
ZM4750A-GS18GICT
Standard Package
5,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Je peux compter sur DiGi Electronics pour une assistance fiable à chaque étape.
Dec 02, 2025
L'envoi de mes commandes a été effectué très rapidement, ce qui m'a permis d'éviter tout retard dans mes projets.
Dec 02, 2025
Une livraison très rapide avec un emballage recyclable, je suis très satisfait.
Dec 02, 2025
こちらの企業は細かなところまで気を配っており、信頼感があります。安心して取引できる会社です。
Dec 02, 2025
I find their pricing fair and their products highly reliable.
Dec 02, 2025
DiGi Electronics' commitment to quality helps me deliver excellent service to my clients.
Dec 02, 2025
The packaging from DiGi Electronics is exceptionally secure, ensuring that all components arrive in perfect condition without any damage during transit.
Dec 02, 2025
Their packaging processes are meticulous, reflecting their commitment to customer satisfaction.
Dec 02, 2025
This product feels tough and resilient, built to handle demanding tasks.
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Frequently Asked Questions (FAQ)
What are the key reliability and derating considerations when using the ZM4750A-GS18 in high-temperature automotive environments near its 175°C operating limit?
The ZM4750A-GS18 is AEC-Q101 qualified and rated for 175°C junction temperature, but sustained operation near this limit significantly impacts long-term reliability. You must derate power dissipation aggressively—Vishay recommends not exceeding 50% of the 1W rating above 125°C. Thermal management via PCB copper area under the DO-213AB package is critical; insufficient heatsinking can cause localized hot spots that accelerate degradation. Always validate thermal performance under worst-case ambient conditions using infrared thermography or embedded thermocouples to avoid premature failure in under-hood or powertrain applications.
Can the ZM4750A-GS18 be safely replaced with a BZX84C27 or MMSZ5256B in a 24V industrial power supply design, and what risks should I evaluate?
While the BZX84C27 (27V, 350mW) and MMSZ5256B (27V, 500mW) share the same nominal Zener voltage, they are not drop-in replacements for the ZM4750A-GS18 due to critical power and packaging differences. The ZM4750A-GS18’s 1W rating and DO-213AB MELF package provide superior surge handling and thermal performance. Substituting with lower-power SOT-23 or SOD-123 parts like the BZX84C27 risks thermal runaway during transient overloads or sustained current conditions. Additionally, the ZM4750A-GS18’s lower dynamic impedance (35Ω max vs. typically >50Ω for smaller packages) ensures tighter voltage regulation. Only consider substitution if your circuit operates well below 350mW and includes robust overcurrent protection—otherwise, stick with the ZM4750A-GS18 for margin and reliability.
How does the ±5% tolerance of the ZM4750A-GS18 affect design margin in precision voltage reference applications, and what compensation strategies are recommended?
The ±5% tolerance on the ZM4750A-GS18 means the actual Zener voltage can range from 25.65V to 28.35V, which may be unacceptable for precision references without additional design mitigation. In sensitive analog or ADC reference circuits, this variation can introduce significant error. To compensate, use the ZM4750A-GS18 in conjunction with a low-offset op-amp buffer and trimming circuitry, or select tighter-tolerance alternatives if available. Alternatively, implement post-assembly calibration or use the diode in non-critical clamping or regulation roles where absolute accuracy is less important. Always simulate worst-case voltage spread in your feedback loops to ensure system stability across all tolerance extremes.
What PCB layout practices are essential to maximize the surge current capability and thermal performance of the ZM4750A-GS18 in DO-213AB packaging?
To fully leverage the ZM4750A-GS18’s 1W power rating and surge robustness, proper PCB layout is non-negotiable. Use a large, continuous ground or power plane connected to both terminals with multiple vias to enhance heat spreading. The DO-213AB MELF package relies heavily on conduction through leads, so minimize thermal resistance by extending copper pours beyond pad footprints. Avoid placing thermal reliefs on pads unless absolutely necessary, as they impede heat flow. Keep trace widths wide (≥20 mil) and ensure adequate clearance to prevent arcing at high voltages. Poor layout can reduce effective power handling by 30–50%, turning a 1W device into a de facto 500mW component under transient loads.
Is the ZM4750A-GS18 suitable for reverse polarity protection in 24V automotive systems, and how does its leakage current impact standby power consumption?
The ZM4750A-GS18 is not ideal as a primary reverse polarity protection device due to its Zener function and 5 µA reverse leakage at 20.6V—while low, this leakage becomes significant in always-on automotive modules where quiescent current must be minimized (e.g., <100 µA total system draw). In a reverse-connected scenario, the diode would conduct heavily and likely fail unless fused. Instead, use a MOSFET-based ideal diode controller for reverse protection. However, the ZM4750A-GS18 can serve as a secondary clamp in conjunction with such circuits to suppress transients. If used in low-power sensing circuits, account for the 5 µA leakage in your total budget—it may accumulate across multiple protection nodes and violate OEM sleep current specifications.
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.
ZM4750A-GS18 CAD Models
Vishay General Semiconductor - Diodes Division ZM4750A-GS18 PCB symbols & footprints
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