My Inquiry
My Account
onsemi BZX85C9V1_T50A
- Part No.:
- BZX85C9V1_T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C9V1_T50A.pdf
- Description:
- DIODE ZENER 9.1V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:2,649
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX85C9V1_T50A from ON Semiconductor is a 9.1 V ±5% tolerance, 1.0 W axial-leaded Zener diode in DO-41 glass package, optimized for voltage regulation and reference applications in power supply feedback loops, overvoltage protection circuits, and precision biasing networks.
For engineers reviewing the BZX85C9V1_T50A datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, dynamic impedance at test current, leakage current at rated voltage, thermal derating behavior, and DO-41 mechanical compatibility with through-hole PCB layouts.
Technical Context
The BZX85C9V1_T50A operates as a silicon planar Zener diode with sharp reverse breakdown characteristics, designed for stable DC voltage reference under regulated current conditions. Its 9.1 V nominal zener voltage is specified at IZ = 5 mA with ZZ = 25 Ω and ZZK = 5 Ω at IZK = 0.5 mA.
It supports operation across -65 °C to +200 °C junction temperature range and exhibits 6.67 mW/°C thermal derating above 50 °C ambient. The device features a cathode band marking on the DO-41 glass body and complies with JEDEC DO-204AL mechanical standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V min / 9.6 V max at IZ = 5 mA - defines tight regulation window for feedback sensing |
| Zener Impedance (ZZ) | 25 Ω @ IZ = 5 mA - low dynamic resistance ensures minimal output voltage variation under load changes |
| Zener Knee Impedance (ZZK) | 5 Ω @ IZK = 0.5 mA - maintains stable regulation even at low bias currents |
| Leakage Current (IR) | 0.5 μA max @ VR = 7 V - negligible standby current in high-impedance reference nodes |
| Power Dissipation (PD) | 1.0 W @ TA = 25 °C - supports robust thermal margin in compact linear regulator designs |
| Thermal Derating | 6.67 mW/°C above 50 °C - enables predictable power reduction in elevated ambient environments |
| Operating Temp Range | -65 °C to +200 °C - suitable for automotive under-hood and industrial control applications |
Pinout & Package
DO-41 glass axial package with cathode band marking; lead length 3/8″ for thermal testing compliance; JEDEC DO-204AL standard outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration |
| Cathode | Zener breakdown terminal | Marked with color band; connected to higher-potential node for voltage clamping/reference |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Ensures consistent regulation accuracy without post-manufacture trimming |
| Low ZZK at 0.5 mA | Enables stable reference operation in ultra-low-power bias networks |
| Hermetically sealed glass package | Provides long-term reliability and moisture resistance in harsh environments |
| JEDEC DO-204AL compliant outline | Guarantees mechanical interchangeability with legacy DO-41 sockets and tooling |
| High junction temperature rating | Supports operation in thermally constrained enclosures without derating penalties |
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 in TL431-like topology. Use Value: Tight 9.1 V ±5% tolerance ensures ±1% output regulation accuracy across line/load variations. | Use Scenario: Placed across sensitive IC inputs to clamp transient surges exceeding 12 V. IC Role / Device Role / Timing Role: Standby shunt protector absorbing ESD or inductive kick energy. Use Value: 0.5 μA leakage at 7 V minimizes quiescent loading on high-impedance signal lines. |
| Temperature-Stable Bias Reference | Linear Regulator Output Divider |
Use Scenario: Provides fixed reference for op-amp-based temperature-compensated current sources. IC Role / Device Role / Timing Role: Precision voltage node stabilizing base-emitter or gate-source bias points. Use Value: 25 Ω ZZ ensures <0.125 V deviation over 5–20 mA operating current range. | Use Scenario: Forms upper leg of resistor divider setting output voltage of adjustable LDOs like LM317. IC Role / Device Role / Timing Role: Stable voltage reference replacing resistive divider for improved load regulation. Use Value: 1.0 W power rating allows sustained dissipation during startup inrush or short-circuit foldback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4739A | 9.1 V ±5%, 1.0 W, DO-41, but ZZ = 10 Ω @ 19 mA - lower impedance at higher test current | Optimized for higher-current regulation; less stable below 10 mA | Select when operating near 20 mA and lowest possible dynamic impedance is critical |
| BZX55C9V1 | 9.1 V ±5%, 0.5 W, DO-35 - same voltage grade but half power rating and smaller package | Limited to low-power signal-level references; not suitable for >500 mW dissipation | Select only for space-constrained PCBs where thermal load remains below 400 mW |
Compared with BZX85C9V1_T50A, the 1N4739A offers lower impedance at higher current but requires revalidation of thermal design, while the BZX55C9V1 reduces footprint at the cost of power handling and thermal robustness-neither is pin-compatible due to differing DO-41 vs DO-35 footprints.
Availability
BZX85C9V1_T50A is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and precision bias networks requiring stable component supply with full traceability and extended lifecycle support.
Supply support for BZX85C9V1_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 management, analog, sensors, and logic solutions for automotive, industrial, and consumer markets.
The BZX85 series is part of ON Semiconductor's general-purpose Zener diode portfolio, engineered for reliable voltage regulation and reference stability in cost-sensitive, high-volume power and signal conditioning applications.
FAQ
What is the exact zener voltage range for BZX85C9V1_T50A at 5 mA test current?
The BZX85C9V1_T50A has a guaranteed zener voltage range of 9.1 V minimum to 9.6 V maximum when measured at IZ = 5 mA and TL = 30 °C ± 1 °C. This ±5% tolerance is confirmed in the official ON Semiconductor datasheet revision 2 (October 2017) and applies strictly to the BZX85C9V1 variant within the BZX85C3V3–BZX85C56 family.
Does BZX85C9V1_T50A have a specified forward voltage?
Yes, the BZX85C9V1_T50A specifies a maximum forward voltage (VF) of 1.2 V at IF = 200 mA. This parameter is documented in the "Electrical Characteristics" section of the ON Semiconductor datasheet and reflects the diode's anode-to-cathode conduction behavior under high forward bias-relevant for polarity protection or reverse-current blocking use cases.
What is the thermal derating slope for BZX85C9V1_T50A above 50 °C ambient?
The BZX85C9V1_T50A has a thermal derating slope of 6.67 mW/°C above 50 °C ambient temperature. This value is derived from its 1.0 W maximum power dissipation at 25 °C and linear reduction to zero at 200 °C, as defined in the Absolute Maximum Ratings table. It must be applied in thermal design calculations for enclosed or high-temperature environments.
Is BZX85C9V1_T50A supplied in DO-41 package with glass or plastic body?
The BZX85C9V1_T50A is supplied in a DO-41 package with a hermetically sealed glass body, as confirmed by the "Physical Dimensions" section (Figure 7) and "Package Standard Reference: JEDEC DO-204 Variation AL" in the ON Semiconductor datasheet. The glass construction provides superior moisture resistance and long-term parameter stability versus plastic alternatives.
What is the maximum leakage current for BZX85C9V1_T50A at 7 V reverse bias?
The maximum leakage current (IR) for BZX85C9V1_T50A is 0.5 μA at VR = 7 V, per the Electrical Characteristics table. This value is measured at TA = 25 °C and defines the upper limit of unwanted current flow before zener conduction begins-critical for low-power reference and high-impedance sensing applications.
BZX85C9V1_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):
- 9.1 V
- Tolerance:
- ±6%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 6.5 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
BZX85C9V1_T50A FAQ
1.How can I place an order for BZX85C9V1_T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C9V1_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 BZX85C9V1_T50A reliable?
The price and inventory of BZX85C9V1_T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C9V1_T50A is usually 5 days.
3.What payment methods are accepted for BZX85C9V1_T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C9V1_T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C9V1_T50A?
BZX85C9V1_T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C9V1_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 BZX85C9V1_T50A?
For technical support, including BZX85C9V1_T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C9V1_T50A requirements.
6.How does Aetrix verify that BZX85C9V1_T50A is sourced from the original manufacturer or authorized distributors?
All BZX85C9V1_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 BZX85C9V1_T50A meets industry standards.
7.What is the process for return or replacement of BZX85C9V1_T50A?
All BZX85C9V1_T50A units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C9V1_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 BZX85C9V1_T50A part is unused and in its original packaging.
Return procedure for BZX85C9V1_T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX85C9V1_T50A Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
