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onsemi BZX85C7V5
- Part No.:
- BZX85C7V5
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C7V5.pdf
- Description:
- DIODE ZENER 7.5V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,562
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Product details
Overview
BZX85C7V5 from onsemi is a 7.5 V ±5% tolerance, 1.0 W axial-leaded Zener diode in DO-41 glass package, with 35 Ω zener impedance at 5 mA test current and 0.5 μA max leakage at 5.6 V reverse voltage, used for precision voltage regulation and reference in power supply feedback loops.
For engineers reviewing the BZX85C7V5 datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, power derating above 50°C, thermal resistance, cathode band identification, and compatibility with through-hole PCB assembly processes.
Technical Context
The BZX85C7V5 operates as a silicon planar Zener diode with controlled avalanche breakdown, specified for stable voltage reference under DC reverse bias conditions. Its 7.0–7.9 V zener voltage range and 35 Ω dynamic impedance at IZ = 5 mA support tight regulation in low-noise analog references and overvoltage clamping circuits.
Designed for operation within –65°C to +200°C junction temperature range, it features 6.67 mW/°C linear derating above 50°C ambient and 1.3 W power dissipation at lead temperature (TL = 25°C, 4 mm lead length), enabling reliable use in industrial and automotive environments with moderate thermal stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.0 V min to 7.9 V max at IZ = 5 mA - defines regulated output voltage window under nominal test conditions |
| Tolerance | ±5% - ensures predictable voltage accuracy across production lots without binning |
| Zener Impedance (ZZ) | 35 Ω at IZ = 5 mA - determines regulation stiffness and load-induced voltage deviation |
| Power Dissipation (PD) | 1.0 W @ TA = 25°C - sets maximum continuous DC power handling at room ambient |
| Leakage Current (IR) | 0.5 μA max @ VR = 5.6 V - guarantees minimal error current in high-impedance reference nodes |
| Operating Temp Range | –65°C to +200°C - supports deployment in extreme environments including under-hood automotive and industrial controls |
Pinout & Package
DO-41 glass axial package with cathode identified by a single color band on the body; leads are tinned copper-clad steel, suitable for wave soldering and manual assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node when used in reverse-bias regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Connected to regulated node; marked by visible band; carries reverse current during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Stable Zener voltage with tight 5% tolerance | Enables direct replacement in legacy designs requiring ±5% reference accuracy without recalibration |
| Low dynamic impedance (35 Ω) | Minimizes output voltage variation under changing load currents in feedback networks |
| High-temperature operation up to +200°C | Permits use in engine control units and industrial motor drives without external heatsinking |
| DO-41 glass package with cathode band | Ensures unambiguous polarity identification during manual or automated assembly |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Precision voltage reference providing stable 7.5 V threshold to TL431 or similar shunt regulator. Use Value: Maintains ±1% output regulation across line/load/transient conditions due to low ZZ and stable VZ. | Use Scenario: Clamping transient surges on 5 V or 12 V rail to prevent damage to downstream logic ICs. IC Role / Device Role / Timing Role: Passive overvoltage clamp absorbing energy during ESD or inductive kick events. Use Value: Limits peak voltage to ≤7.9 V with <0.5 μA leakage at 5.6 V, preserving signal integrity in always-on circuits. |
| Industrial Sensor Reference | Automotive Body Control Module |
Use Scenario: Providing excitation voltage for resistive temperature detectors (RTDs) in PLC analog input modules. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage reference source for ratiometric measurement circuits. Use Value: Delivers stable 7.5 V reference with <35 Ω output impedance, reducing gain error in 24-bit ADC front-ends. | Use Scenario: Voltage monitoring and reset generation in BCM microcontroller power domains. IC Role / Device Role / Timing Role: Supervisory reference for brown-out detection and safe shutdown sequencing. Use Value: Operates reliably from –40°C to +125°C ambient with full spec compliance, meeting AEC-Q101 stress requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A | Same 7.5 V nominal VZ, but ±5% tolerance and 35 Ω ZZ; DO-41 package; same PD = 1.0 W | Identical functional role; widely available in legacy inventory; identical thermal derating profile | Drop-in alternative where ON Semiconductor sourcing is constrained; verify marking and lot traceability |
| MMBZ5236B | SMD SOT-23 package; 7.5 V VZ, ±5%; 35 Ω ZZ; PD = 350 mW - lower power rating | Used in space-constrained PCBs; not suitable for >350 mW continuous dissipation | Select only when board real estate is critical and thermal design accommodates reduced power handling |
Compared with BZX85C7V5, the 1N4734A offers identical electrical specs and through-hole compatibility, while the MMBZ5236B trades package size for lower power capability-making the former ideal for direct replacement and the latter for miniaturized designs with adequate thermal margin.
Availability
BZX85C7V5 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and sensor interface circuits requiring stable component supply and long-term manufacturability.
Supply support for BZX85C7V5 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The BZX85C7V5 belongs to the BZX85C series of general-purpose Zener diodes engineered for cost-sensitive, high-reliability voltage regulation and protection in through-hole manufacturing environments.
FAQ
What is the zener voltage range for BZX85C7V5?
The BZX85C7V5 has a guaranteed zener voltage range of 7.0 V to 7.9 V at test current IZ = 5 mA, reflecting its ±5% tolerance specification. This range is measured under thermal equilibrium at lead temperature TL = 30°C ±1°C with 3/8" lead length, per onsemi's characterization methodology. The BZX85C7V5 maintains this performance across its full operating temperature range.
Can BZX85C7V5 be used in surface-mount designs?
No, the BZX85C7V5 uses a DO-41 axial glass package designed exclusively for through-hole mounting. It cannot be directly placed on SMT pads. For surface-mount equivalents, consider the MMBZ5236B (SOT-23) or NZ9F7V5T5G (SOD-123), both offering 7.5 V regulation but with lower power ratings and different thermal profiles than the BZX85C7V5.
What is the maximum leakage current for BZX85C7V5?
The BZX85C7V5 specifies a maximum leakage current of 0.5 μA at reverse voltage VR = 5.6 V and TA = 25°C. This low leakage ensures minimal error current in high-impedance reference circuits and preserves accuracy in battery-powered or low-power sensor interfaces where standby current matters.
How does BZX85C7V5 handle thermal derating?
The BZX85C7V5 derates linearly at 6.67 mW/°C above 50°C ambient temperature, reducing its usable power dissipation from 1.0 W at 25°C to approximately 867 mW at 70°C. This derating applies to free-air conditions; PCB copper area and airflow significantly affect actual thermal performance in end equipment using the BZX85C7V5.
Is BZX85C7V5 compliant with automotive standards?
The BZX85C7V5 is not AEC-Q101 qualified, though its –65°C to +200°C operating temperature range and robust DO-41 glass construction support use in non-safety-critical automotive subsystems like body control modules and lighting drivers. For AEC-Q101-compliant alternatives, consult onsemi's Automotive Zener portfolio, such as the SZBZX85C7V5 variant.
BZX85C7V5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 7.5 V
- Tolerance:
- ±6%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 3 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 4.5 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-204AL (DO-41)
BZX85C7V5 FAQ
1.How can I place an order for BZX85C7V5 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C7V5 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 BZX85C7V5 reliable?
The price and inventory of BZX85C7V5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C7V5 is usually 5 days.
3.What payment methods are accepted for BZX85C7V5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C7V5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C7V5?
BZX85C7V5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C7V5 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 BZX85C7V5?
For technical support, including BZX85C7V5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C7V5 requirements.
6.How does Aetrix verify that BZX85C7V5 is sourced from the original manufacturer or authorized distributors?
All BZX85C7V5 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 BZX85C7V5 meets industry standards.
7.What is the process for return or replacement of BZX85C7V5?
All BZX85C7V5 units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C7V5, 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 BZX85C7V5 part is unused and in its original packaging.
Return procedure for BZX85C7V5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX85C7V5 Tags
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MMSZ5231B-7-F
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MM5Z5V1ST1G
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