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onsemi BZX85C11_T50R
- Part No.:
- BZX85C11_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C11_T50R.pdf
- Description:
- DIODE ZENER 11V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:3,356
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Product details
Overview
BZX85C11_T50R from onsemi is a 11 V ±5% tolerance, 1.0 W axial-leaded Zener diode in DO-41 glass package, rated for 20 Ω zener impedance at 5 mA test current and 0.5 μA maximum leakage at 8.4 V reverse voltage, used for precision voltage regulation and overvoltage protection in DC power rails.
For engineers reviewing the BZX85C11_T50R 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), cathode band identification, and compliance with JEDEC DO-204AL mechanical standards.
Technical Context
The BZX85C11_T50R operates as a silicon planar Zener diode with sharp reverse breakdown at nominal 11 V, specified under thermal equilibrium conditions at lead temperature TL = 30°C ±1°C and 3/8″ lead length. Its design supports stable reference generation in low-noise analog circuits and clamping in transient-prone industrial interfaces.
Zener voltage is guaranteed between 10.4 V (min) and 11.6 V (max) at IZ = 5 mA; dynamic impedance is 20 Ω at that current and rises to 300 Ω at IZK = 0.5 mA. Maximum leakage current is 0.5 μA at VR = 8.4 V - 75% of nominal zener voltage - ensuring low standby power loss in battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10.4 V to 11.6 V at IZ = 5 mA - defines regulated output range for reference or clamp applications |
| Power Dissipation (PD) | 1.0 W at TA = 25°C - sets maximum continuous DC power handling without heatsinking |
| Zener Impedance (ZZ) | 20 Ω at IZ = 5 mA - determines regulation stiffness under load variation |
| Leakage Current (IR) | 0.5 μA max at VR = 8.4 V - ensures minimal current draw below breakdown in standby mode |
| Operating Temp Range | −65°C to +200°C - enables use in automotive engine compartments and industrial motor controls |
| Package | DO-41 glass case with cathode band - provides hermetic sealing and JEDEC-standard mechanical compatibility |
| Forward Voltage (VF) | 1.2 V max at IF = 200 mA - supports bidirectional ESD protection when paired with series resistor |
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 or hand soldering per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to lower-potential node in shunt regulator configuration; reverse-biased during regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with color band; connected to higher-potential rail to sink current and clamp voltage at VZ |
Key Features
| Feature | Design Value |
|---|---|
| Tight voltage tolerance | ±5% at 5 mA - reduces need for post-regulation trimming in fixed-voltage supplies |
| Low dynamic impedance | 20 Ω at 5 mA - maintains <±25 mV output shift across 1–10 mA load changes |
| High-temperature operation | Junction storage up to +200°C - supports under-hood automotive and high-power LED driver designs |
| Hermetic glass seal | DO-41 package per JEDEC DO-204AL - prevents moisture ingress and long-term parameter drift |
| Controlled leakage | 0.5 μA max at 8.4 V - enables use in micropower sensor nodes with >10-year battery life |
Applications
| Industrial Power Supply Regulation | Automotive ECU Reference Clamping |
|---|---|
|
Use Scenario: Stabilizing 12 V rail in programmable logic controller (PLC) I/O modules against line transients. IC Role / Device Role / Timing Role: Shunt voltage regulator providing 11 V reference for op-amp comparators and ADC bias networks. Use Value: Maintains ±1.5% reference accuracy over −40°C to +85°C ambient with no external compensation required. |
Use Scenario: Protecting microcontroller reset inputs from load-dump spikes in 12 V vehicle networks. IC Role / Device Role / Timing Role: Overvoltage clamp limiting reset pin voltage to ≤11.6 V during ISO 7637-2 Pulse 5a events. Use Value: Absorbs 1.0 W peak energy without degradation, enabling direct connection to unfiltered battery lines. |
| Medical Sensor Signal Conditioning | Consumer Audio DC Bias Generation |
|
Use Scenario: Establishing precise 11 V bias for photodiode transimpedance amplifiers in portable pulse oximeters. IC Role / Device Role / Timing Role: Low-noise voltage reference source for analog front-end gain stages. Use Value: 20 Ω impedance minimizes noise coupling into high-gain amplifier inputs, preserving SNR >85 dB. |
Use Scenario: Generating stable bias voltage for Class AB headphone amplifier output stage in battery-powered DACs. IC Role / Device Role / Timing Role: Local rail clamp preventing amplifier latch-up during USB power negotiation surges. Use Value: 0.5 μA leakage ensures <1 μW quiescent drain from Li-ion cell, extending playback time by >8 hours. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4740A | 10 V ±5%, 1.0 W, 17 Ω ZZ @ 25 mA - higher test current, lower impedance but tighter thermal sensitivity | Requires higher bias current; less suitable for micropower designs where IZ < 5 mA is needed | Select when system can guarantee ≥25 mA zener current and needs lower dynamic impedance at higher loads |
| BZX85C10 | 10 V ±5%, same DO-41 package, 25 Ω ZZ @ 5 mA - 1 V lower nominal voltage, identical thermal specs | Used where 10 V reference is preferred for compatibility with legacy schematics or comparator thresholds | Choose for drop-in replacement where 1 V lower regulation point meets functional requirements and layout reuse is critical |
Compared with BZX85C11_T50R, the 1N4740A delivers lower impedance at higher currents but demands more bias power, while the BZX85C10 offers identical packaging and reliability with a 1 V lower regulation point - making both viable alternatives depending on voltage margin and current budget constraints.
Availability
BZX85C11_T50R is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive ECU clamping, and medical sensor biasing requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for BZX85C11_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 management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The BZX85C11_T50R belongs to the BZX85C series of general-purpose Zener diodes designed for cost-sensitive, high-reliability voltage regulation and protection in DC power systems across automotive, industrial, and medical equipment.
FAQ
What is the zener voltage tolerance for BZX85C11_T50R?
The BZX85C11_T50R has a nominal zener voltage of 11 V with a guaranteed tolerance of ±5%, meaning the actual measured VZ falls between 10.4 V and 11.6 V when tested at IZ = 5 mA and TL = 30°C ±1°C. This tolerance is maintained across the full operating temperature range and is verified per onsemi's production test flow.
Can BZX85C11_T50R be used in surface-mount designs?
No - the BZX85C11_T50R is exclusively offered in the axial DO-41 glass package and is not available in SMD variants such as SOD-123 or DO-214AC. For surface-mount equivalents, engineers should consider the MMBZ5240B (10 V) or BZX84-C11 (SOT-23), which differ in package, thermal performance, and test conditions from the BZX85C11_T50R.
What is the maximum allowable junction temperature for BZX85C11_T50R?
The BZX85C11_T50R has a maximum junction temperature (TJ) rating of +200°C, matching its storage temperature limit. This allows operation in high-ambient environments such as engine control units or enclosed industrial drives, provided power dissipation remains within derated limits - e.g., 0.67 W at 100°C ambient using the 6.67 mW/°C derating factor.
How does the cathode band identify polarity on BZX85C11_T50R?
The cathode band on the BZX85C11_T50R is a single colored ring located near one end of the DO-41 glass body, indicating the cathode terminal. When installed, this banded end connects to the higher-potential node (e.g., +12 V rail), while the unbanded anode connects toward ground or lower potential - essential for correct shunt regulation and reverse-bias operation of the BZX85C11_T50R.
Is BZX85C11_T50R compliant with RoHS and REACH?
Yes - the BZX85C11_T50R is manufactured and shipped in full compliance with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, including exemption 7a for lead in glass. onsemi confirms lead content in the glass envelope is below 0.1 wt% and fully disclosed in their material declarations, supporting BZX85C11_T50R use in environmentally regulated markets.
BZX85C11_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):
- 11 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 8 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 7.7 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
BZX85C11_T50R FAQ
1.How can I place an order for BZX85C11_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C11_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 BZX85C11_T50R reliable?
The price and inventory of BZX85C11_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C11_T50R is usually 5 days.
3.What payment methods are accepted for BZX85C11_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C11_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C11_T50R?
BZX85C11_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C11_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 BZX85C11_T50R?
For technical support, including BZX85C11_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C11_T50R requirements.
6.How does Aetrix verify that BZX85C11_T50R is sourced from the original manufacturer or authorized distributors?
All BZX85C11_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 BZX85C11_T50R meets industry standards.
7.What is the process for return or replacement of BZX85C11_T50R?
All BZX85C11_T50R units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C11_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 BZX85C11_T50R part is unused and in its original packaging.
Return procedure for BZX85C11_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX85C11_T50R Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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