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onsemi BZX79C3V6-T50A
- Part No.:
- BZX79C3V6-T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79C3V6-T50A.pdf
- Description:
- DIODE ZENER 3.6V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:25,911
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Product details
Overview
BZX79C3V6-T50A from ON Semiconductor is a 3.6 V, ±5% tolerance Zener diode in DO-35 glass package, rated for 500 mW power dissipation at TL ≤ 75°C, with 90 Ω dynamic impedance at 5 mA test current and -3.5 mV/°C temperature coefficient - used for precision voltage reference and overvoltage protection in low-power analog circuits.
For engineers reviewing the BZX79C3V6-T50A datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, thermal coefficient, leakage current at 1 V (15 μA max), junction capacitance (185 pF at 0 V), and DO-35 mechanical compatibility in space-constrained PCB layouts.
Technical Context
This device operates as a two-terminal silicon Zener diode optimized for stable voltage regulation in reverse-biased mode. It achieves nominal 3.6 V breakdown at 5 mA with tight ±5% initial tolerance and predictable negative temperature drift of -3.5 mV/°C - enabling accurate biasing in temperature-sensitive sensor interfaces and reference dividers.
The DO-35 axial glass package supports lead-soldered mounting with cathode band identification, and its 500 mW power rating derates linearly at 4.0 mW/°C above 75°C ambient - ensuring reliable operation across industrial (-65°C to +200°C) storage and operating temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.4 V to 3.8 V at IZ = 5 mA - defines regulated output range for reference or clamp applications |
| Tolerance | ±5% - ensures consistent voltage setting without post-production trimming |
| Dynamic Impedance (ZZ) | 90 Ω max at IZ = 5 mA - limits regulation error under load current variation |
| Temperature Coefficient (TC) | -3.5 mV/°C - enables predictable drift compensation in wide-temperature designs |
| Leakage Current (IR) | 15 μA max at VR = 1 V - minimizes standby power loss in battery-powered circuits |
| Junction Capacitance (CJ) | 185 pF at VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and transient response |
| Power Dissipation (PD) | 500 mW at TL ≤ 75°C - sets maximum continuous DC or pulsed power handling capability |
Pinout & Package
DO-35 glass axial package with cathode identified by a single color band on the body; leads are tinned copper alloy, suitable for wave or hand soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in reverse-bias regulation; determines polarity of clamping action |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with color band; supplies stable 3.6 V reference when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Stable Zener voltage with tight tolerance | ±5% initial accuracy enables direct use in untrimmed reference circuits |
| Negative temperature coefficient | -3.5 mV/°C allows predictable drift modeling for compensated designs |
| Low leakage current | 15 μA max at 1 V reverse bias reduces quiescent current in always-on systems |
| Controlled dynamic impedance | 90 Ω max at 5 mA ensures <1% regulation error across typical load variations |
| Industrial temperature range | -65°C to +200°C operating/storage range supports harsh-environment deployment |
Applications
| Portable Sensor Biasing | Microcontroller Reset Clamping |
|---|---|
Use Scenario: Providing stable 3.6 V bias to analog front-end op-amps in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Precision voltage reference source for signal conditioning circuitry. Use Value: Tight ±5% tolerance and low 15 μA leakage extend battery life while maintaining ADC input accuracy. | Use Scenario: Clamping reset line voltage to prevent spurious MCU resets during supply transients. IC Role / Device Role / Timing Role: Overvoltage protection element tied between reset pin and ground. Use Value: 90 Ω ZZ and fast 3.6 V breakdown ensure immediate clamping without latch-up risk. |
| Low-Power Reference Divider | Industrial Signal Conditioning |
Use Scenario: Generating 1.8 V reference via resistor divider from 3.6 V rail in ultra-low-power IoT nodes. IC Role / Device Role / Timing Role: Stable voltage source feeding resistive divider network. Use Value: -3.5 mV/°C TC enables matched drift with downstream components for improved ratiometric accuracy. | Use Scenario: Regulating excitation voltage for 4–20 mA loop-powered pressure transmitters. IC Role / Device Role / Timing Role: Primary voltage regulator in isolated analog signal path. Use Value: 500 mW rating and DO-35 package allow robust operation in DIN-rail mounted enclosures up to +75°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4728A | Same 3.6 V nominal, but ±5% tolerance and 90 Ω ZZ; DO-41 package (larger than DO-35) | Requires PCB footprint change; higher thermal mass suits higher-power dissipation | Select when board layout allows larger axial package and >500 mW margin is needed |
| BZX55C3V6 | Same 3.6 V, ±5%, 90 Ω ZZ, but DO-35 package and 500 mW rating - identical form factor | No footprint or thermal redesign required; same cathode marking convention | Preferred drop-in alternative if sourcing flexibility across ON Semi and legacy NXP/Bourns lines is critical |
Compared with BZX79C3V6-T50A, the 1N4728A offers identical electrical specs but requires mechanical redesign due to DO-41 size, while BZX55C3V6 matches footprint, rating, and performance - making it the most seamless alternative for continuity planning.
Availability
BZX79C3V6-T50A is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset clamping, and low-power reference divider applications requiring stable component supply and long-term obsolescence management.
Supply support for BZX79C3V6-T50A 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, cloud, and consumer markets.
The BZX79C series was designed specifically for general-purpose voltage regulation and transient suppression in cost-sensitive, space-constrained applications - emphasizing reliability, tight tolerance, and broad temperature operation in axial-glass packages.
FAQ
What is the nominal Zener voltage of the BZX79C3V6-T50A?
The BZX79C3V6-T50A has a nominal Zener voltage of 3.6 V, with a guaranteed range of 3.4 V to 3.8 V at 5 mA test current and ±5% tolerance per the ON Semiconductor datasheet. This value is measured under thermal equilibrium conditions at lead temperature of 30°C ± 1°C with 3/8" lead length - critical for repeatable bench validation of the BZX79C3V6-T50A.
Does the BZX79C3V6-T50A have a positive or negative temperature coefficient?
The BZX79C3V6-T50A exhibits a negative temperature coefficient of -3.5 mV/°C, meaning its Zener voltage decreases slightly as temperature increases. This behavior is inherent to low-voltage Zener devices below ~5 V and must be accounted for in precision reference designs - the BZX79C3V6-T50A's specified TC enables accurate drift modeling across its -65°C to +200°C operating range.
What is the maximum power dissipation rating for the BZX79C3V6-T50A?
The BZX79C3V6-T50A is rated for 500 mW power dissipation at lead temperature (TL) ≤ 75°C, with linear derating of 4.0 mW/°C above that point. This rating applies to the DO-35 glass package under standard 3/8" lead length conditions - exceeding this limit risks irreversible junction damage, so thermal design must verify actual TL in the target BZX79C3V6-T50A application.
How is the cathode identified on the BZX79C3V6-T50A package?
The cathode of the BZX79C3V6-T50A is marked by a single color band on the glass body of the DO-35 package - consistent with industry-standard polarity identification for axial Zener diodes. This band corresponds to the cathode terminal, which must be connected to the higher-potential node in reverse-bias regulation configurations - correct orientation is essential for proper BZX79C3V6-T50A functionality.
What is the typical junction capacitance of the BZX79C3V6-T50A?
The BZX79C3V6-T50A has a typical junction capacitance of 185 pF measured at 0 V reverse bias and 1 MHz frequency. This value influences high-frequency noise rejection and transient response time in clamping applications - designers should consider this capacitance when placing the BZX79C3V6-T50A near sensitive analog inputs or fast digital lines.
BZX79C3V6-T50A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.6 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 15 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 100 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
BZX79C3V6-T50A FAQ
1.How can I place an order for BZX79C3V6-T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79C3V6-T50A 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 BZX79C3V6-T50A reliable?
The price and inventory of BZX79C3V6-T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79C3V6-T50A is usually 5 days.
3.What payment methods are accepted for BZX79C3V6-T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79C3V6-T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79C3V6-T50A?
BZX79C3V6-T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79C3V6-T50A 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 BZX79C3V6-T50A?
For technical support, including BZX79C3V6-T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79C3V6-T50A requirements.
6.How does Aetrix verify that BZX79C3V6-T50A is sourced from the original manufacturer or authorized distributors?
All BZX79C3V6-T50A 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 BZX79C3V6-T50A meets industry standards.
7.What is the process for return or replacement of BZX79C3V6-T50A?
All BZX79C3V6-T50A units undergo pre-shipment inspection (PSI). If there is an issue with BZX79C3V6-T50A, 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 BZX79C3V6-T50A part is unused and in its original packaging.
Return procedure for BZX79C3V6-T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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