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onsemi BZX85C7V5_T50R
- Part No.:
- BZX85C7V5_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C7V5_T50R.pdf
- Description:
- DIODE ZENER 7.5V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:4,405
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Product details
Overview
BZX85C7V5_T50R from onsemi is a 7.5 V, ±5% tolerance, 1.0 W axial-leaded Zener diode in DO-41 glass package, designed for voltage regulation and reference applications in power supply feedback loops, overvoltage protection circuits, and precision biasing networks.
For engineers reviewing the BZX85C7V5_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage accuracy (7.0–7.9 V), dynamic impedance (35 Ω @ 5 mA), leakage current (0.5 μA max @ 5.6 V), and thermal derating (6.67 mW/°C above 50°C).
Technical Context
The BZX85C7V5_T50R operates as a silicon planar Zener diode with controlled reverse-breakdown characteristics, optimized for stable DC voltage reference under regulated current conditions. Its junction temperature range (−65 °C to +200 °C) and glass-passivated DO-41 package support reliability in industrial and automotive environments.
It exhibits a nominal zener voltage of 7.5 V at test current IZ = 5 mA, with zener impedance ZZ = 35 Ω and knee impedance ZZK = 200 Ω at IZK = 0.5 mA - enabling predictable clamping behavior across low-to-moderate current loads.
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 usable regulation window for feedback or clamp design |
| Tolerance | ±5% - ensures predictable voltage setpoint without post-calibration in cost-sensitive designs |
| Power Dissipation (PD) | 1.0 W @ TA = 25°C - sets maximum continuous DC power handling before thermal derating applies |
| Zener Impedance (ZZ) | 35 Ω @ IZ = 5 mA - determines output voltage variation under load current changes |
| Leakage Current (IR) | 0.5 μA max @ VR = 5.6 V - guarantees minimal standby current in high-impedance bias networks |
| Operating Temp Range | −65 °C to +200 °C - supports deployment in under-hood, industrial control, and wide-temperature PCBs |
| Forward Voltage (VF) | 1.2 V max @ IF = 200 mA - enables use as polarity-sensitive rectifier or ESD path in dual-role circuits |
Pinout & Package
DO-41 glass axial package with cathode indicated by color band; leads are unmarked but electrically symmetric except for polarity - cathode is banded end, anode is unbanded end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased Zener terminal | Connected to higher-potential node in regulation/clamp configuration; carries reverse current during breakdown |
| Anode (unbanded end) | Reference/ground terminal | Typically tied to system ground or lower-voltage rail; completes current path during Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Stable Zener voltage with tight 5% tolerance | Enables accurate voltage references without trimming in mid-precision analog and power circuits |
| Low dynamic impedance (35 Ω) | Minimizes output voltage drift under varying load currents in feedback and sensing paths |
| High-temperature operation up to +200 °C | Supports mounting near heat sources (e.g., power MOSFETs, transformers) without derating penalties |
| DO-41 glass package with hermetic seal | Provides long-term stability and moisture resistance in harsh or high-reliability environments |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Zener reference element setting error amplifier threshold; replaces TL431 in low-cost designs. Use Value: Delivers stable 7.5 V reference with <35 Ω impedance, minimizing output ripple sensitivity to load transients. | Use Scenario: Placed across sensitive IC inputs (e.g., microcontroller reset pins) to shunt transient surges. IC Role / Device Role / Timing Role: Passive voltage clamp limiting input to ≤7.9 V during ESD or inductive kick events. Use Value: 1.0 W power rating allows absorption of short-duration 100–200 ns spikes without degradation. |
| Temperature-Stable Bias Network | Industrial Sensor Excitation Reference |
Use Scenario: Provides fixed bias voltage for op-amp input stages in analog front-ends operating across −40 °C to +85 °C. IC Role / Device Role / Timing Role: Precision DC reference source compensating for amplifier offset drift. Use Value: ±5% tolerance and low tempco (inherent to DO-41 construction) maintain bias within 0.4 V over full industrial range. | Use Scenario: Supplies excitation voltage to resistive bridge sensors (e.g., strain gauges, RTDs) in PLC modules. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage reference ensuring measurement linearity. Use Value: 0.5 μA max leakage prevents loading of high-impedance sensor bridges, preserving signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | Same 5.1 V nominal rating, but ±5% tolerance, 1.0 W, DO-41 - differs in voltage grade only | Designed for 5.1 V regulation; not interchangeable without circuit revalidation | Select only if target regulation point matches 5.1 V; verify thermal layout compatibility with BZX85C7V5_T50R |
| BZX55C7V5 | Same 7.5 V rating, ±5%, 500 mW power, DO-35 package - lower power and smaller footprint | Suitable for low-power signal-level clamping; insufficient for >500 mW dissipation scenarios | Choose when board space is constrained and average power < 0.5 W; confirm lead thermal relief meets DO-35 requirements |
Compared with BZX85C7V5_T50R, the 1N4733A serves a different voltage grade (5.1 V vs. 7.5 V), while the BZX55C7V5 offers identical regulation but reduced power handling (500 mW) and smaller DO-35 packaging - requiring layout and thermal redesign for direct substitution.
Availability
BZX85C7V5_T50R is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and industrial sensor excitation networks requiring stable component supply and long-lifecycle availability.
Supply support for BZX85C7V5_T50R 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 manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The BZX85 series belongs to onsemi's general-purpose Zener diode product line, engineered for reliable voltage regulation and reference functions in cost-sensitive, high-volume power management and protection applications.
FAQ
What is the zener voltage tolerance of BZX85C7V5_T50R?
The BZX85C7V5_T50R has a guaranteed zener voltage range of 7.0 V to 7.9 V at IZ = 5 mA, corresponding to a ±5% tolerance. This specification is verified per onsemi's BZX85C3V3–BZX85C56 datasheet Rev. 2 (October 2017), and applies to all units regardless of date code or manufacturing lot. The BZX85C7V5_T50R maintains this tolerance across its rated operating temperature range.
Can BZX85C7V5_T50R be used in surface-mount designs?
No - the BZX85C7V5_T50R uses a DO-41 axial glass package with 0.4-inch lead spacing and is intended for through-hole mounting only. It lacks solder pads, land patterns, or thermal pad structures required for SMT assembly. For surface-mount equivalents, consider the MMBZ5236B (SOT-23, 7.5 V) or NZ9F7V5T5G (SOD-123, 7.5 V), which are distinct part numbers with different form factors and ratings.
What is the maximum allowable power dissipation for BZX85C7V5_T50R at 75°C ambient?
At TA = 75°C, the BZX85C7V5_T50R must be derated from its 1.0 W rating at 25°C. With a derating factor of 6.67 mW/°C above 50°C, the allowable power is 1.0 W − (25°C × 6.67 mW/°C) = 833 mW. This value assumes free-air conditions and proper lead length; PCB copper area and airflow may further influence actual thermal performance of the BZX85C7V5_T50R.
Does BZX85C7V5_T50R have a specified zener impedance at low test currents?
Yes - the BZX85C7V5_T50R specifies knee impedance ZZK = 200 Ω at IZK = 0.5 mA, indicating its dynamic resistance near the onset of breakdown. This parameter is critical for low-current reference applications where regulation must begin well below the nominal 5 mA test point. The BZX85C7V5_T50R's ZZK value is documented in the Electrical Characteristics table of the official onsemi datasheet.
Is the cathode marking on BZX85C7V5_T50R consistent with JEDEC DO-41 standards?
Yes - the BZX85C7V5_T50R features a single color band on the cathode end, fully compliant with JEDEC DO-204AL (DO-41) mechanical standard. This marking aligns with onsemi's top-marking specification: Line 1 is the ON Semiconductor logo, Line 2 reads "85C", Line 3 reads "7V5", and the cathode band is positioned adjacent to Line 3. Polarity orientation is unambiguous and field-verifiable on every BZX85C7V5_T50R unit.
BZX85C7V5_T50R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- 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-41
BZX85C7V5_T50R FAQ
1.How can I place an order for BZX85C7V5_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C7V5_T50R 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_T50R reliable?
The price and inventory of BZX85C7V5_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C7V5_T50R is usually 5 days.
3.What payment methods are accepted for BZX85C7V5_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C7V5_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C7V5_T50R?
BZX85C7V5_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C7V5_T50R 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_T50R?
For technical support, including BZX85C7V5_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C7V5_T50R requirements.
6.How does Aetrix verify that BZX85C7V5_T50R is sourced from the original manufacturer or authorized distributors?
All BZX85C7V5_T50R 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_T50R meets industry standards.
7.What is the process for return or replacement of BZX85C7V5_T50R?
All BZX85C7V5_T50R units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C7V5_T50R, 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_T50R part is unused and in its original packaging.
Return procedure for BZX85C7V5_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX85C7V5_T50R Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZT52C15-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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