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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Vishay General Semiconductor - Diodes Division ZMY7V5-GS18

Name: ZMY7V5-GS18
Brand: Vishay General Semiconductor - Diodes Division
SKU: ZMY7V5-GS18
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZMY7V5-GS18

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Zener Diodes

Package:: DO-213AB, MELF (Glass)

Datasheet:: ZMY7V5-GS18.pdf

Description:: DIODE ZENER 7.5V 1W DO213AB

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Product details

Overview

ZMY7V5-GS18 from Vishay Semiconductors is a silicon planar power Zener diode in MELF (DO-213AB) glass package, rated for 1000 mW power dissipation, with nominal Zener voltage 7.5 V at 100 mA test current, dynamic resistance 100 Ω, and temperature coefficient 0 × 10⁻⁴/°C - used for precision voltage stabilization in high-reliability power supply feedback loops.

For engineers reviewing the ZMY7V5-GS18 datasheet, ZMY7V5-GS18 pinout, ZMY7V5-GS18 application, or ZMY7V5-GS18 equivalent, key selection criteria include its 7.0–7.9 V Zener voltage range, 100 mA test current, 1000 mW power rating, MELF glass package thermal performance (R_thJA = 170 K/W), and suitability for industrial power regulation and overvoltage clamping where stable low-voltage reference is required.

Technical Context

ZMY7V5-GS18 operates as a single-element, unidirectional voltage reference device with sharp reverse breakdown characteristics. Its Zener voltage is specified at I_ZT = 100 mA under DC conditions, with typical dynamic resistance of 100 Ω at 1 kHz and zero temperature coefficient at nominal operating point.

The diode is optimized for stabilization and clipping circuits requiring high power handling in compact MELF form factor. It exhibits a maximum junction temperature of 175 °C, storage range from –55 to +175 °C, and complies with MSL level 1 per J-STD-020 for lead-free reflow compatibility up to 260 °C peak.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	7.0 V min / 7.5 V nom / 7.9 V max - defines stable regulation window for 5 V–12 V system rails
Test Current (I_ZT)	100 mA - ensures specified V_Z and dynamic resistance under continuous DC bias
Power Dissipation (P_tot)	1000 mW - enables use in medium-power shunt regulators without heatsinking at ambient ≤ 25 °C
Dynamic Resistance (Z_Z)	100 Ω at 1 kHz - determines load regulation sensitivity and ripple rejection in feedback paths
Temperature Coefficient (αV_Z)	0 × 10⁻⁴/°C - provides near-zero drift across operating temperature range for stable reference
Junction-to-Ambient Thermal Resistance	170 K/W - sets derating curve for ambient temperature operation above 25 °C
Maximum Junction Temperature	175 °C - supports extended industrial and automotive under-hood environments

Pinout & Package

MELF (DO-213AB) glass package: cylindrical glass body with axial metallized ends; cathode identified by band marking; dimensions 4.0 mm × 1.25 mm (L × Ø); weight ≈ 135 mg; UL 94 V-0 molding compound.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / low-impedance path during forward bias	Connected to lower-potential node in shunt configuration; conducts when V_IN < V_Z – 0.7 V
Cathode	Zener breakdown terminal / regulated output node	Connected to regulated rail; maintains V_OUT ≈ V_Z when reverse biased above breakdown threshold

Key Features

Feature	Design Value
Silicon planar construction	Ensures tight V_Z tolerance (±5% over E24 grading) and repeatable breakdown characteristics
MELF DO-213AB package	Provides superior thermal dissipation vs. axial leads and high reliability in vibration-prone environments
Zero temperature coefficient at 7.5 V	Eliminates need for external compensation in precision references operating from –40 to +125 °C
1000 mW power rating	Supports direct shunt regulation of 50–100 mA loads without series pass transistor
MSL Level 1 rating	Enables standard Pb-free reflow assembly without baking or special handling

Applications

Industrial Power Supply Feedback	Automotive Body Control Module Clamping
Use Scenario: Shunt regulator in isolated flyback auxiliary winding feedback circuit for 5 V/12 V secondary rail. IC Role / Device Role / Timing Role: Zener diode providing precise 7.5 V reference to optocoupler input, enabling closed-loop voltage regulation. Use Value: Zero αV_Z ensures ±0.5% output stability over –40 to +105 °C ambient, critical for factory-set calibration retention.	Use Scenario: Overvoltage clamp on LIN bus transceiver power rail exposed to load-dump transients. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting rail to ≤8 V during 12 V system surges. Use Value: 1000 mW rating absorbs 100 ms, 20 V pulses without degradation; MELF glass withstands mechanical shock in dashboard mounting.
Programmable Logic Controller I/O Protection	Medical Sensor Signal Conditioning
Use Scenario: Input protection network for 24 V digital input module interfacing with field switches. IC Role / Device Role / Timing Role: Clamping diode limiting transient-induced overvoltage on microcontroller GPIO pins. Use Value: 100 Ω Z_Z ensures fast response to <100 ns spikes; DO-213AB package survives repeated ESD events per IEC 61000-4-2 Level 4.	Use Scenario: Reference voltage source for 16-bit ADC front-end in portable patient monitor analog signal chain. IC Role / Device Role / Timing Role: Low-drift voltage reference stabilizing gain-setting resistors in instrumentation amplifier stage. Use Value: 0 × 10⁻⁴/°C αV_Z contributes <0.05% full-scale error over clinical operating range (15–40 °C), meeting IEC 60601-1 accuracy requirements.

Industrial Power Supply Feedback

Automotive Body Control Module Clamping

Use Scenario: Shunt regulator in isolated flyback auxiliary winding feedback circuit for 5 V/12 V secondary rail.

IC Role / Device Role / Timing Role: Zener diode providing precise 7.5 V reference to optocoupler input, enabling closed-loop voltage regulation.

Use Value: Zero αV_Z ensures ±0.5% output stability over –40 to +105 °C ambient, critical for factory-set calibration retention.

Use Scenario: Overvoltage clamp on LIN bus transceiver power rail exposed to load-dump transients.

IC Role / Device Role / Timing Role: Transient voltage suppressor limiting rail to ≤8 V during 12 V system surges.

Use Value: 1000 mW rating absorbs 100 ms, 20 V pulses without degradation; MELF glass withstands mechanical shock in dashboard mounting.

Programmable Logic Controller I/O Protection

Medical Sensor Signal Conditioning

Use Scenario: Input protection network for 24 V digital input module interfacing with field switches.

IC Role / Device Role / Timing Role: Clamping diode limiting transient-induced overvoltage on microcontroller GPIO pins.

Use Value: 100 Ω Z_Z ensures fast response to <100 ns spikes; DO-213AB package survives repeated ESD events per IEC 61000-4-2 Level 4.

Use Scenario: Reference voltage source for 16-bit ADC front-end in portable patient monitor analog signal chain.

IC Role / Device Role / Timing Role: Low-drift voltage reference stabilizing gain-setting resistors in instrumentation amplifier stage.

Use Value: 0 × 10⁻⁴/°C αV_Z contributes <0.05% full-scale error over clinical operating range (15–40 °C), meeting IEC 60601-1 accuracy requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX85C7V5 (Nexperia)	DO-41 package, 1000 mW, V_Z = 7.5 V ±5%, R_thJA = 200 K/W, αV_Z = +2 × 10⁻⁴/°C	Higher thermal resistance limits ambient derating; positive tempco requires compensation in wide-temp designs	Select when DO-41 footprint is fixed and moderate tempco is acceptable
1N4733A (ON Semiconductor)	DO-41 package, 1000 mW, V_Z = 7.5 V ±5%, R_thJA = 220 K/W, αV_Z = +3 × 10⁻⁴/°C	Lower thermal efficiency and higher tempco reduce long-term stability in unheatsinked PCB layouts	Choose for legacy DO-41 compatibility where MELF assembly is unavailable

Compared with BZX85C7V5 and 1N4733A, ZMY7V5-GS18 offers superior thermal performance (R_thJA = 170 K/W vs. ≥200 K/W) and zero temperature coefficient - delivering tighter regulation stability in space-constrained, high-ambient industrial modules without layout or compensation changes.

Availability

ZMY7V5-GS18 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, programmable logic controller I/O modules, and medical sensor signal conditioning requiring stable component supply and long-lifecycle support.

Supply support for ZMY7V5-GS18 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

Vishay Intertechnology is a global manufacturer of discrete semiconductors and passive components, founded in 1962 and headquartered in Malvern, Pennsylvania.

ZMY7V5-GS18 belongs to Vishay's ZMY series of high-power MELF Zener diodes, engineered specifically for industrial and automotive voltage regulation where reliability, thermal robustness, and low-temperature drift are critical.

FAQ

What is the Zener voltage tolerance for ZMY7V5-GS18?

ZMY7V5-GS18 has a Zener voltage range of 7.0 V (minimum) to 7.9 V (maximum) at 100 mA test current, corresponding to a nominal 7.5 V with ±6.7% total spread. This aligns with E24 standard grading and is verified per Vishay document 85788 Rev. 2.2. The ZMY7V5-GS18 datasheet specifies this tolerance under DC conditions at T_amb = 25 °C.

Is ZMY7V5-GS18 suitable for surface-mount reflow assembly?

Yes, ZMY7V5-GS18 is qualified for lead-free reflow soldering with peak temperature up to 260 °C and is rated MSL Level 1 per J-STD-020 - meaning it may be stored indefinitely at ≤30 °C/60% RH without baking. The MELF DO-213AB glass package of ZMY7V5-GS18 supports standard SMT pick-and-place and reflow profiles used in high-volume manufacturing.

What is the maximum continuous Zener current for ZMY7V5-GS18?

The maximum admissible Zener current for ZMY7V5-GS18 is 100 mA at T_amb = 25 °C, derived from its 1000 mW power rating and nominal 7.5 V Zener voltage (P = V × I). At elevated ambient temperatures, current must be derated per the P_tot vs. T_amb curve in Figure 1 of the ZMY7V5-GS18 datasheet to maintain T_j ≤ 175 °C.

Does ZMY7V5-GS18 have polarity marking, and how is cathode identified?

Yes, ZMY7V5-GS18 features cathode identification via a distinct band marking on the glass body - consistent with industry-standard MELF polarity convention. The banded end is the cathode; the opposite end is the anode. This marking is visible under standard optical inspection and is documented in the package drawing (Fig. 18317) of the ZMY7V5-GS18 datasheet.

How does the temperature coefficient of ZMY7V5-GS18 compare to other 7.5 V Zeners?

ZMY7V5-GS18 has a temperature coefficient of 0 × 10⁻⁴/°C at I_ZT = 100 mA, making it uniquely stable among 7.5 V Zeners. In contrast, most DO-41 alternatives like 1N4733A exhibit +3 × 10⁻⁴/°C, introducing ~15 mV/°C drift. This zero-coefficient behavior is intrinsic to the ZMY7V5-GS18's silicon planar process and is confirmed in Table "Electrical Characteristics" of the ZMY7V5-GS18 datasheet.

ZMY7V5-GS18 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: -

Package/Case:: DO-213AB, MELF (Glass)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 7.5 V

Tolerance:: ±5%

Power - Max:: 1 W

Impedance (Max) (Zzt):: 2 Ohms

Current - Reverse Leakage @ Vr:: 500 nA @ 5 V

Voltage - Forward (Vf) (Max) @ If:: -

Operating Temperature:: 175°C

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: DO-213AB

ZMY7V5-GS18 FAQ

1.How can I place an order for ZMY7V5-GS18 through Aetrix?

Please submit a Request for Quotation (RFQ) for ZMY7V5-GS18 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 ZMY7V5-GS18 reliable?

The price and inventory of ZMY7V5-GS18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZMY7V5-GS18 is usually 5 days.

3.What payment methods are accepted for ZMY7V5-GS18?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZMY7V5-GS18 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZMY7V5-GS18?

ZMY7V5-GS18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZMY7V5-GS18 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 ZMY7V5-GS18?

For technical support, including ZMY7V5-GS18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZMY7V5-GS18 requirements.

6.How does Aetrix verify that ZMY7V5-GS18 is sourced from the original manufacturer or authorized distributors?

All ZMY7V5-GS18 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 ZMY7V5-GS18 meets industry standards.

7.What is the process for return or replacement of ZMY7V5-GS18?

All ZMY7V5-GS18 units undergo pre-shipment inspection (PSI). If there is an issue with ZMY7V5-GS18, 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 ZMY7V5-GS18 part is unused and in its original packaging.

Return procedure for ZMY7V5-GS18:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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