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onsemi 1N4693
- Part No.:
- 1N4693
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4693.pdf
- Description:
- DIODE ZENER 7.5V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:2,088
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Product details
Overview
1N4693 from ON Semiconductor is a 500 mW, DO-35 hermetically sealed glass Zener diode with nominal zener voltage of 7.5 V (±5%), dynamic impedance of 31.8 Ω at IZT = 5.7 mA, reverse leakage current ≤10 µA at VR = 6.0 V, and ESD rating >16 kV (HBM Class 3). It serves as a precision voltage reference or shunt regulator in low-power analog sensing and biasing circuits.
For engineers reviewing the 1N4693 datasheet, pinout, applications, or equivalent options, key selection criteria include its tight ±5% voltage tolerance, low 31.8 Ω zener impedance at 5.7 mA test current, DO-35 package compatibility with axial-lead PCB layouts, and guaranteed <10 µA leakage at 80% of nominal breakdown voltage.
Technical Context
The 1N4693 employs silicon-oxide passivated junction technology to achieve sharp breakdown characteristics and stable regulation at low operating currents. Its double-slug, metallurgically bonded construction ensures hermetic sealing and thermal reliability across –65°C to +200°C operating range.
It operates with a forward voltage ≤0.75 V at IF = 100 mA and exhibits a zener voltage temperature coefficient near zero for the 7.5 V variant (per Figure 4a), making it suitable for temperature-sensitive reference applications where drift must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.125–7.875 V at IZT = 5.7 mA; ±5% tolerance enables precise mid-range voltage clamping without trimming. |
| Power Dissipation | 500 mW at TL ≤ 75°C; derates linearly to zero at 200°C - supports operation in compact, unheatsinked designs. |
| Zener Impedance (ZZ) | 31.8 Ω at IZT = 5.7 mA; low dynamic resistance ensures minimal output voltage variation under load changes. |
| Reverse Leakage (IR) | ≤10 µA at VR = 6.0 V; low leakage preserves accuracy in high-impedance bias networks. |
| ESD Rating | Class 3 (>16 kV HBM); robust electrostatic immunity simplifies handling and board-level ESD protection design. |
| Package | DO-35 (JEDEC DO-204AH); axial-leaded, hermetically sealed glass case with cathode band marking. |
Pinout & Package
Package: DO-35 (DO-204AH) - hermetically sealed glass, axial-lead, double-slug construction with cathode indicated by a painted band on the glass body. Leads are corrosion-resistant and solderable at 230°C for 10 seconds at 1/16″ from case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground node | Connected to circuit ground or lower-potential rail; forms reference return path during regulation. |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input supply or voltage node requiring clamping; delivers stable 7.5 V reference when reverse-biased. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass sealing | Enables reliable operation in humid, corrosive, or high-reliability industrial environments without encapsulation. |
| Oxide-passivated junction | Delivers sharp, repeatable breakdown and low noise - critical for precision analog references and sensor excitation. |
| Low leakage at 80% VZ | Ensures minimal error contribution in high-Z voltage divider or op-amp feedback networks. |
| Zero-TC region near 7.5 V | Minimizes voltage drift over temperature (–55°C to +150°C), supporting stable biasing in wide-temperature applications. |
Applications
| Instrumentation Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing a stable 7.5 V reference for 12-bit ADC biasing in portable multimeters. IC Role / Device Role / Timing Role: Shunt voltage reference connected between ADC VREF+ and ground, regulating supply rail against battery droop. Use Value: ±5% tolerance and <10 µA leakage ensure full-scale accuracy remains within 0.5 LSB across 0–50°C ambient. |
Use Scenario: Protecting microcontroller I/O pins from transient surges on 5 V logic lines in factory automation panels. IC Role / Device Role / Timing Role: Bidirectional clamp (anode-to-ground, cathode-to-line) limiting voltage to ≤7.875 V during ESD events. Use Value: >16 kV HBM rating and 31.8 Ω dynamic impedance enable fast response with minimal overshoot before TVS activation. |
| Sensor Excitation | Low-Power Bias Network |
Use Scenario: Supplying constant-current excitation to a platinum RTD bridge in HVAC temperature transmitters. IC Role / Device Role / Timing Role: Zener-regulated current source (with series resistor) delivering 0.5 mA ±2% to bridge legs. Use Value: Low 31.8 Ω impedance maintains current stability despite ±10% supply variation and 25°C–85°C ambient shifts. |
Use Scenario: Generating a clean 7.5 V bias for op-amp input stages in battery-powered gas detectors. IC Role / Device Role / Timing Role: Passive shunt regulator feeding high-impedance op-amp non-inverting inputs. Use Value: ≤10 µA leakage prevents loading errors in 10 MΩ+ feedback networks, preserving gain accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A | 10% tolerance (7.1–7.9 V), 1 W power rating, DO-41 package (larger footprint) | Higher power dissipation but looser tolerance; suited for less precision, higher current regulation. | Select 1N4734A only if ≥1 W dissipation or PCB layout accommodates DO-41; not drop-in for space-constrained DO-35 footprints. |
| BZX55C7V5 | ±5% tolerance, 500 mW, DO-35 package, but rated for 200°C max junction temperature (vs. 200°C storage for 1N4693) | Identical mechanical fit and voltage spec, but tighter thermal limits may affect long-term reliability in sustained 150°C ambient. | BZX55C7V5 is a direct form-fit alternative with identical marking and lead spacing; verify thermal margin per application. |
Compared with 1N4693, the 1N4734A offers higher power but sacrifices precision and package compatibility, while BZX55C7V5 matches form and voltage tolerance but requires validation of junction temperature limits under continuous DC stress.
Availability
1N4693 is available at Aetrix Electronics and suitable for instrumentation reference, overvoltage clamp, sensor excitation, and low-power bias network applications requiring stable component supply and long-term obsolescence resilience.
Supply support for 1N4693 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The 1N4693 belongs to the legacy 1N4678 Series of low-leakage, oxide-passivated Zener diodes designed specifically for precision voltage reference and low-current regulation in harsh-environment analog systems.
FAQ
What is the nominal zener voltage and tolerance of the 1N4693?
The 1N4693 has a nominal zener voltage of 7.5 V with a standard tolerance of ±5%, corresponding to a guaranteed range of 7.125 V to 7.875 V at IZT = 5.7 mA and TL = 30°C. This tolerance is specified per JEDEC standards and confirmed in the ON Semiconductor datasheet revision 1, page 199.
What is the maximum steady-state power dissipation for the 1N4693?
The 1N4693 is rated for 500 mW maximum steady-state power dissipation at lead temperature (TL) ≤ 75°C, with linear derating of 4.0 mW/°C above that temperature. Full derating occurs at 200°C, as shown in Figure 1 of the official datasheet.
Does the 1N4693 have an ESD rating, and if so, what is it?
Yes, the 1N4693 has an ESD rating of Class 3 (>16 kV) per the Human Body Model (HBM), as explicitly stated in the "Specification Features" section of the ON Semiconductor datasheet. This rating applies to the device itself and is verified during manufacturing screening.
What is the reverse leakage current specification for the 1N4693?
The 1N4693 guarantees reverse leakage current ≤10 µA at VR = 6.0 V (80% of nominal VZ), measured at TA = 25°C. This value is listed in the Electrical Characteristics table on page 199 and reflects performance under standard test conditions.
What package type does the 1N4693 use, and how is polarity marked?
The 1N4693 uses the DO-35 (JEDEC DO-204AH) hermetically sealed glass package. Polarity is marked by a visible cathode band - a painted stripe on the glass body - with the cathode lead extending from the banded end. Mechanical details are specified in the "Mechanical Characteristics" section on page 197.
1N4693 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 7.5 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 5.7 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 100 mA
- Operating Temperature:
- -65°C ~ 200°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N4693 FAQ
1.How can I place an order for 1N4693 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4693 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 1N4693 reliable?
The price and inventory of 1N4693 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4693 is usually 5 days.
3.What payment methods are accepted for 1N4693?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4693 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4693?
1N4693 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4693 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 1N4693?
For technical support, including 1N4693 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4693 requirements.
6.How does Aetrix verify that 1N4693 is sourced from the original manufacturer or authorized distributors?
All 1N4693 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 1N4693 meets industry standards.
7.What is the process for return or replacement of 1N4693?
All 1N4693 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4693, 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 1N4693 part is unused and in its original packaging.
Return procedure for 1N4693:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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