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onsemi BZX85C36_T50A
- Part No.:
- BZX85C36_T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C36_T50A.pdf
- Description:
- DIODE ZENER 36V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:9,574
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Product details
Overview
BZX85C36_T50A from ON Semiconductor is a 36 V ±5% tolerance, 1.0 W axial-leaded Zener diode in DO-41 glass package, with zener impedance of 8 Ω at 40 mA and leakage current ≤0.25 μA at 25 V, used for precision voltage regulation and overvoltage protection in power supply feedback loops.
For engineers reviewing the BZX85C36_T50A datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, power derating above 50°C (6.67 mW/°C), thermal resistance (junction-to-lead), and cathode-band polarity marking per JEDEC DO-41 standard.
Technical Context
The BZX85C36_T50A operates as a reverse-biased voltage reference diode with stable breakdown at 36 V nominal under 40 mA test current. Its glass-encapsulated DO-41 package ensures hermetic sealing and thermal stability across −65°C to +200°C operating range.
Zener voltage is measured at lead temperature TL = 30°C ±1°C with 3/8″ lead length; specified leakage current (IR ≤ 0.25 μA at VR = 25 V) confirms low standby power loss, while forward voltage VF ≤ 1.2 V at IF = 200 mA supports bidirectional clamping verification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 34 V min / 38 V max at IZ = 40 mA - defines regulated output range for feedback sensing |
| Power Dissipation | 1.0 W @ TA = 25°C - sets maximum continuous power handling without heatsinking |
| Zener Impedance (ZZ) | 8 Ω @ IZ = 40 mA - indicates low dynamic resistance for tight regulation under load transients |
| Leakage Current (IR) | ≤0.25 μA @ VR = 25 V - ensures minimal quiescent current in high-impedance bias networks |
| Operating Temp Range | −65°C to +200°C - enables use in automotive under-hood and industrial high-temp environments |
| Package | DO-41 glass axial - provides hermetic seal, mechanical robustness, and JEDEC-standard footprint |
| Tolerance | ±5% - allows predictable voltage margining in closed-loop regulator designs |
Pinout & Package
DO-41 glass axial package with cathode indicated by color band on body; two-terminal device with anode and cathode leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-bias regulation configuration |
| Cathode | Zener breakdown terminal | Marked with color band; connected to regulated voltage rail or error amplifier input |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass encapsulation | Ensures long-term parameter stability and moisture resistance in harsh environments |
| Low zener impedance (8 Ω) | Minimizes output voltage deviation during current step changes in feedback paths |
| High-temperature operation (up to +200°C) | Supports deployment in engine control units and industrial motor drives without derating |
| JEDEC DO-41 compliance | Guarantees mechanical interchangeability and automated assembly compatibility |
| 5% voltage tolerance | Enables consistent loop gain setting in voltage-mode DC-DC controllers |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback network. IC Role / Device Role / Timing Role: Zener reference providing precise 36 V threshold to error amplifier input. Use Value: Tight 5% VZ tolerance and 8 Ω impedance maintain ±1% output regulation across line/load variations. | Use Scenario: Clamping transient surges on 24 V industrial I/O lines exposed to inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional voltage limiter absorbing positive spikes above 36 V and blocking reverse leakage. Use Value: ≤0.25 μA IR at 25 V prevents false triggering while 1.0 W rating handles 100 ms surge events. |
| Programmable Voltage Reference | Temperature-Stable Bias Network |
Use Scenario: Setting reference voltage for analog comparators in battery management systems requiring 36 V trip point. IC Role / Device Role / Timing Role: Precision shunt reference replacing higher-cost IC references where moderate accuracy suffices. Use Value: Stable VZ across −65°C to +200°C eliminates need for external temperature compensation circuitry. | Use Scenario: Establishing stable bias current for high-side NPN transistor drivers in automotive lighting modules. IC Role / Device Role / Timing Role: Zener-based current source with low thermal drift due to glass package thermal mass. Use Value: DO-41 glass construction reduces thermal coefficient impact versus plastic-packaged alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5227B | 36 V nominal, ±5%, 0.5 W rating, DO-35 package | Lower power handling limits use in >500 mW sustained regulation | Select when board space is constrained and thermal load is light |
| MMSZ5227ET1G | 36 V nominal, ±5%, 0.35 W, SOD-123 surface-mount | No axial through-hole mounting; requires PCB rework for legacy designs | Choose for automated SMT production where DO-41 footprint is not required |
Compared with BZX85C36_T50A, the 1N5227B offers identical voltage spec but reduced power capability and smaller DO-35 package, while MMSZ5227ET1G trades axial mounting for SMT compatibility and lower thermal mass-neither is pin-compatible, and both require layout or thermal design review.
Availability
BZX85C36_T50A is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and programmable voltage reference designs requiring stable component supply and full traceability.
Supply support for BZX85C36_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 power management, analog, sensors, and discrete devices for automotive, industrial, and consumer markets.
The BZX85C36_T50A belongs to the BZX85C series of general-purpose Zener diodes designed for reliable voltage regulation and transient suppression in cost-sensitive, high-volume power applications.
FAQ
What is the zener voltage tolerance for BZX85C36_T50A?
The BZX85C36_T50A has a zener voltage tolerance of ±5%, meaning its breakdown voltage falls between 34 V and 38 V when tested at 40 mA. This tolerance is guaranteed across the full operating temperature range and is critical for maintaining accuracy in feedback and reference circuits where BZX85C36_T50A is deployed.
How does the DO-41 glass package affect thermal performance of BZX85C36_T50A?
The DO-41 glass package of BZX85C36_T50A provides hermetic sealing and superior thermal stability versus plastic packages, enabling operation up to +200°C. Its junction-to-lead thermal resistance supports 1.0 W dissipation at 25°C, with linear derating of 6.67 mW/°C above 50°C-key for BZX85C36_T50A reliability in high-temp environments.
Can BZX85C36_T50A be used in bidirectional clamping configurations?
Yes, BZX85C36_T50A can be used bidirectionally: its forward voltage is ≤1.2 V at 200 mA, allowing it to clamp negative transients, while its 36 V zener action suppresses positive overvoltages. This dual behavior makes BZX85C36_T50A suitable for protecting sensitive inputs in industrial I/O where both polarities must be limited.
What is the maximum leakage current specification for BZX85C36_T50A?
The maximum leakage current for BZX85C36_T50A is 0.25 μA at VR = 25 V and TA = 25°C. This ultra-low IR ensures minimal loading on high-impedance nodes-such as optocoupler LED bias networks-where BZX85C36_T50A serves as a reference, preserving signal integrity and efficiency.
Is BZX85C36_T50A suitable for automotive under-hood applications?
Yes, BZX85C36_T50A is rated for −65°C to +200°C operating and storage temperatures and uses a hermetically sealed DO-41 glass package, making it suitable for under-hood automotive applications such as engine control unit voltage monitoring and sensor biasing where BZX85C36_T50A must withstand thermal cycling and humidity exposure.
BZX85C36_T50A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 36 V
- Tolerance:
- ±6%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 25 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
BZX85C36_T50A FAQ
1.How can I place an order for BZX85C36_T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C36_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 BZX85C36_T50A reliable?
The price and inventory of BZX85C36_T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C36_T50A is usually 5 days.
3.What payment methods are accepted for BZX85C36_T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C36_T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C36_T50A?
BZX85C36_T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C36_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 BZX85C36_T50A?
For technical support, including BZX85C36_T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C36_T50A requirements.
6.How does Aetrix verify that BZX85C36_T50A is sourced from the original manufacturer or authorized distributors?
All BZX85C36_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 BZX85C36_T50A meets industry standards.
7.What is the process for return or replacement of BZX85C36_T50A?
All BZX85C36_T50A units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C36_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 BZX85C36_T50A part is unused and in its original packaging.
Return procedure for BZX85C36_T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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