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Diodes Incorporated ZM4764A-13
- Part No.:
- ZM4764A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
ZM4764A-13.pdf
- Description:
- DIODE ZENER 100V 1W MELF
- Quantity:
- Payment:
- Shipping:
Inventory:8,064
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Product details
Overview
ZM4764A-13 from Diodes Incorporated is a 100 V, 1.0 W surface-mount Zener diode in MELF glass package, rated for ±5% tolerance at 25°C, with 350 Ω maximum Zener impedance at 2.5 mA test current and 5.0 µA maximum reverse leakage at 76 V, used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the ZM4764A-13 datasheet, ZM4764A-13 pinout, ZM4764A-13 application, or ZM4764A-13 equivalent, key selection criteria include nominal Zener voltage (100 V), power dissipation (1.0 W), thermal resistance (170 °C/W), MELF package dimensions (A: 4.8–5.2 mm, B: 2.4–2.6 mm), and derating behavior above 50°C ambient.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its sharp knee characteristic-verified by dual-point Zener impedance measurement at 10% AC superimposition on DC test current-ensures reliable regulation stability and low noise performance.
The device features a glass-passivated MELF structure with solderable terminals per MIL-STD-202 Method 208, enabling high reliability in thermally demanding environments. Its −65°C to +200°C operating range supports industrial and automotive under-hood applications where thermal cycling and long-term stability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 100 V ±5% @ IZT = 2.5 mA - defines precise clamping threshold for overvoltage protection |
| Power Dissipation (Pd) | 1.0 W @ TA = 25°C - sets maximum continuous DC power handling before thermal derating |
| Zener Impedance (ZZT) | 350 Ω max @ IZT = 2.5 mA - indicates regulation stiffness; lower values improve line/load regulation |
| Reverse Leakage (IR) | 5.0 µA max @ VR = 76 V - ensures minimal standby current in high-impedance bias networks |
| Thermal Resistance (RJA) | 170 °C/W - determines junction temperature rise per watt; critical for PCB layout thermal design |
| Surge Current (IZS) | 45 A @ 8.3 ms - defines single-event transient energy absorption capability (e.g., ISO 7637-2 pulse 1) |
| Operating Temperature | −65°C to +200°C - enables use in extended-temperature industrial and automotive control modules |
Pinout & Package
Package: MELF (Metal Electrode Leadless Face), glass body with axial cathode band marking; dimensions A = 4.8–5.2 mm (length), B = 2.4–2.6 mm (diameter), C = 0.55 mm (lead diameter); weight ≈ 0.25 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reverse-biased reference node | Connected to lower-potential side of regulated circuit; forms reference node when reverse-biased |
| Cathode | Zener breakdown terminal / Voltage clamp output | Marked with band; connected to higher-potential side; provides stable 100 V reference when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| Sharp-knee Zener breakdown | Verified via dual-point ZZ measurement ensuring stable regulation and rejection of unstable units |
| Glass-passivated MELF construction | Enables hermetic sealing, high reliability, and compatibility with automated reflow processes |
| High surge current rating | 45 A peak for 8.3 ms supports robust transient suppression in automotive and industrial power rails |
| Extended temperature operation | Functional across −65°C to +200°C without parameter drift or mechanical failure |
| MIL-STD-202 compliant terminations | Solderable glass-metal interface ensures long-term bond integrity under thermal cycling stress |
Applications
| Switch-Mode Power Supply Feedback | Automotive ECU Overvoltage Clamp |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters using optocoupler feedback loop. IC Role / Device Role / Timing Role: Provides precise 100 V reference for TL431-like shunt regulator stage. Use Value: Enables tight output regulation (±1%) despite input line and load variation due to low ZZT and stable VZ tolerance. | Use Scenario: Clamps 12 V/24 V battery rail transients exceeding 76 V during load dump events. IC Role / Device Role / Timing Role: Acts as passive overvoltage protector upstream of microcontroller power domain. Use Value: Absorbs 45 A surge for 8.3 ms without failure, meeting ISO 7637-2 Pulse 5a requirements. |
| Industrial Sensor Signal Conditioning | Programmable Logic Controller Input Protection |
Use Scenario: Stabilizes excitation voltage for 4–20 mA current-loop pressure sensors in harsh factory environments. IC Role / Device Role / Timing Role: Serves as temperature-stable voltage reference for analog front-end biasing. Use Value: Maintains regulation accuracy across −40°C to +85°C ambient due to wide Tj range and low thermal coefficient. | Use Scenario: Protects 24 V digital input channels from field-wiring induced surges and polarity reversal. IC Role / Device Role / Timing Role: Functions as bidirectional clamp (with series resistor) limiting input voltage to safe levels. Use Value: Delivers <5 µA leakage at 76 V, minimizing false triggering in high-impedance PLC input stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAZ100-13 | 100 V, 1.0 W, DO-214AC package; 200 Ω ZZT @ 2.5 mA; 10 µA IR @ 76 V | Lower ZZT improves regulation but higher leakage increases quiescent error | Preferred for space-constrained PCBs where thermal mass is less critical than footprint size |
| DFLZ100Q-7 | 100 V, 1.0 W, SOD-123FL package; 250 Ω ZZT @ 2.5 mA; 1 µA IR @ 76 V; AEC-Q200 qualified | Lower leakage and automotive qualification enable direct replacement in safety-critical ECUs | Required for new automotive designs needing AEC-Q200 compliance and tighter leakage control |
Compared with ZM4764A-13, SMAZ100-13 offers better regulation stiffness but trades off leakage-induced offset error, while DFLZ100Q-7 adds AEC-Q200 qualification and lower leakage at the cost of reduced surge current margin (30 A vs. 45 A).
Availability
ZM4764A-13 is available at Aetrix Electronics and suitable for switch-mode power supplies, automotive electronic control units, and industrial sensor signal conditioning requiring stable component supply and long-term obsolescence management.
Supply support for ZM4764A-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for power management, signal integrity, and protection applications.
The ZM47xxA series belongs to Diodes' legacy Zener diode portfolio designed specifically for precision voltage reference and transient suppression in industrial and automotive systems where MELF reliability and thermal robustness are essential.
FAQ
Is ZM4764A-13 still in active production?
No, ZM4764A-13 is officially discontinued per Diodes Incorporated's DS18009 Rev. 4 datasheet. Aetrix Electronics maintains limited legacy stock and supports transition to SMAZ100-13 or DFLZ100Q-7 with full parametric and qualification alignment documentation.
What is the maximum allowable junction temperature for ZM4764A-13?
The absolute maximum junction temperature is +200°C, consistent with its specified storage and operating temperature range. At 25°C ambient, full 1.0 W power dissipation is allowed; above 50°C ambient, linear derating applies per Figure 1 (170 °C/W RJA).
Can ZM4764A-13 be used in place of a 1N4764A?
Yes-ZM4764A-13 is functionally identical to 1N4764A in electrical specifications (100 V, 1.0 W, ±5%), but differs in packaging: ZM4764A-13 uses MELF glass, whereas 1N4764A typically uses DO-41. Mechanical fit and thermal profile must be validated for the target PCB layout.
How does the 8.3 ms surge rating translate to real-world transient protection?
The 45 A rating at 8.3 ms corresponds to the standardized ISO 7637-2 Load Dump Pulse 5a waveform. This enables direct use in 12 V/24 V automotive systems without additional series impedance, provided board-level layout minimizes parasitic inductance in the clamping path.
ZM4764A-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-213AB, MELF (Glass)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 100 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 350 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 76 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- MELF
ZM4764A-13 FAQ
1.How can I place an order for ZM4764A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZM4764A-13 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 ZM4764A-13 reliable?
The price and inventory of ZM4764A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZM4764A-13 is usually 5 days.
3.What payment methods are accepted for ZM4764A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZM4764A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZM4764A-13?
ZM4764A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZM4764A-13 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 ZM4764A-13?
For technical support, including ZM4764A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZM4764A-13 requirements.
6.How does Aetrix verify that ZM4764A-13 is sourced from the original manufacturer or authorized distributors?
All ZM4764A-13 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 ZM4764A-13 meets industry standards.
7.What is the process for return or replacement of ZM4764A-13?
All ZM4764A-13 units undergo pre-shipment inspection (PSI). If there is an issue with ZM4764A-13, 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 ZM4764A-13 part is unused and in its original packaging.
Return procedure for ZM4764A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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