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onsemi BZX55C9V1_T26A
- Part No.:
- BZX55C9V1_T26A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX55C9V1_T26A.pdf
- Description:
- DIODE ZENER 9.1V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:5,646
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Product details
Overview
BZX55C9V1_T26A from Fairchild Semiconductor is a 9.1 V ±5% tolerance Zener diode in DO-35 glass package, rated for 500 mW power dissipation at 75°C with 10 Ω dynamic impedance at 5 mA test current and 0.1 μA maximum reverse leakage at 7 V. It provides precise voltage regulation in low-power reference and protection circuits.
For engineers reviewing the BZX55C9V1_T26A datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, thermal derating behavior, cathode identification via color band, and compatibility with through-hole PCB layouts requiring stable 9.1 V clamping.
Technical Context
The BZX55C9V1_T26A operates as a two-terminal voltage reference device, conducting in reverse breakdown to maintain a stable 9.1 V across its terminals when biased above its knee voltage. Its 5% tolerance and 10 Ω dynamic impedance ensure predictable regulation under varying load and temperature conditions.
Designed for operation within -65°C to +200°C junction and storage temperature range, it supports reliable performance in industrial and automotive environments where thermal cycling and long-term stability are critical. The DO-35 glass package enables hermetic sealing and consistent thermal resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal, min 8.5 V / max 9.6 V - defines precise clamping threshold for overvoltage protection and reference generation |
| Tolerance | ±5% - ensures voltage accuracy without post-manufacture trimming in cost-sensitive designs |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets maximum continuous power handling before thermal derating begins |
| Dynamic Impedance (ZZ) | 10 Ω @ IZ = 5 mA - determines output voltage variation under changing load current |
| Reverse Leakage (IR) | 0.1 μA @ VR = 7 V - confirms minimal standby current in high-impedance bias networks |
| Max Zener Current (IZM) | 43 mA - derived from PD/VZ, limits safe peak conduction during transient suppression |
| Operating Temp Range | -65°C to +200°C - supports deployment in extreme ambient conditions without parameter drift |
Pinout & Package
DO-35 glass axial package with cathode identified by a single color band. Leads are tinned copper-clad steel, suitable for wave or hand soldering. Package dimensions conform to JEDEC DO-35 standard: 1.8–2.2 mm diameter, 4.0–5.5 mm body length, 25 mm lead length minimum.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connects to lower-potential node in reverse-biased regulation configuration |
| Cathode | Reverse breakdown terminal | Marked with color band; connects to higher-potential node to enable Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Stable 9.1 V reference | Guaranteed 8.5–9.6 V range at 25°C enables accurate analog sensing and feedback loops |
| Low dynamic impedance | 10 Ω at 5 mA minimizes output voltage shift under load variations in precision references |
| Hermetic DO-35 package | Glass encapsulation ensures long-term parameter stability and moisture resistance |
| Wide temperature operation | -65°C to +200°C rating supports use in under-hood automotive and industrial control modules |
| 5% voltage tolerance | Eliminates need for external calibration in non-critical voltage clamp applications |
Applications
| Voltage Reference for Analog Sensors | Overvoltage Clamp in Power Supply Rails |
|---|---|
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) or strain gauges in industrial process controllers. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference establishing fixed bias point independent of supply fluctuations. Use Value: 9.1 V output with ±5% tolerance and <10 Ω impedance ensures sensor bridge output linearity remains unaffected by rail noise. | Use Scenario: Protecting 5 V or 3.3 V logic inputs from accidental 12 V transients on shared I/O lines in PLC backplanes. IC Role / Device Role / Timing Role: Shunt regulator clamping excess voltage to prevent damage to downstream CMOS inputs. Use Value: 43 mA IZM and 0.1 μA leakage allow fast response to spikes while drawing negligible quiescent current during normal operation. |
| ESD Protection for Serial Interface Lines | Feedback Divider Stabilization in DC-DC Converters |
Use Scenario: Secondary-level ESD protection on RS-232 or CAN bus termination points where primary TVS devices handle bulk energy. IC Role / Device Role / Timing Role: Low-capacitance shunt element limiting voltage excursion to safe levels during sub-100 ns events. Use Value: DO-35 package parasitics and 9.1 V clamping threshold align with IEC 61000-4-2 Level 4 requirements for secondary protection zones. | Use Scenario: Stabilizing upper resistor in feedback divider network of adjustable buck converter to improve output voltage accuracy. IC Role / Device Role / Timing Role: Precision voltage reference replacing standard resistor to reduce temperature-induced output drift. Use Value: 10 Ω ZZ and -65°C to +200°C operating range minimize gain error across environmental stress testing. |
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 rating, DO-41 package, 10 Ω ZZ @ 23 mA | Higher power handling but larger footprint; requires layout revision for through-hole replacement | Select when >500 mW continuous dissipation is required and board space permits DO-41 |
| BZX55C9V1 (ON Semiconductor) | Identical 9.1 V ±5%, DO-35, 500 mW, 10 Ω ZZ - same electrical specs and package | No functional or mechanical difference; second-source availability only | Choose for supply chain diversification without design change |
Compared with 1N4739A and BZX55C9V1 (ON), the BZX55C9V1_T26A offers identical Zener characteristics and DO-35 form factor as the ON variant, while differing in power rating and package size from the 1N4739A - making it optimal for space-constrained 500 mW reference designs requiring Fairchild-sourced components.
Availability
BZX55C9V1_T26A is available at Aetrix Electronics and suitable for voltage reference, overvoltage clamp, and ESD protection applications requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for BZX55C9V1_T26A 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
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, signal conditioning, and discrete components before its acquisition by ON Semiconductor in 2016.
The BZX55 series was developed as a general-purpose Zener diode family targeting cost-effective, reliable voltage regulation in consumer, industrial, and automotive electronics with standardized DO-35 packaging.
FAQ
What is the Zener voltage tolerance of BZX55C9V1_T26A?
The BZX55C9V1_T26A has a nominal Zener voltage of 9.1 V with a guaranteed tolerance of ±5%, meaning its actual breakdown voltage falls between 8.5 V and 9.6 V at 25°C and 5 mA test current. This tolerance is specified per the Fairchild BZX55C2V4–BZX55C56 datasheet Rev. D1 and applies directly to the BZX55C9V1_T26A variant.
Does BZX55C9V1_T26A have a cathode marking?
Yes, the BZX55C9V1_T26A uses a DO-35 glass package with a single color band indicating the cathode terminal. This marking follows JEDEC standards and matches the polarity convention used across the full BZX55C series. The anode is the unmarked lead, and correct orientation is essential for proper reverse-bias operation of the BZX55C9V1_T26A.
What is the maximum power dissipation for BZX55C9V1_T26A?
The BZX55C9V1_T26A is rated for 500 mW power dissipation at a lead temperature of 75°C. Above this temperature, it must be derated linearly at 4.0 mW/°C. This limit reflects thermal constraints of the DO-35 glass package and ensures reliable long-term operation of the BZX55C9V1_T26A in real-world PCB environments.
Can BZX55C9V1_T26A be used in automotive applications?
Yes, the BZX55C9V1_T26A supports operation from -65°C to +200°C, meeting extended temperature requirements common in under-hood automotive modules. Its DO-35 glass construction provides hermetic sealing against humidity and contaminants, making the BZX55C9V1_T26A suitable for engine control units, body electronics, and powertrain subsystems where reliability under thermal stress is critical.
What is the dynamic impedance of BZX55C9V1_T26A at its test current?
The BZX55C9V1_T26A exhibits a dynamic impedance (ZZ) of 10 Ω when measured at its specified test current of 5 mA. This value quantifies how tightly the device regulates voltage under small-signal AC variations and is confirmed in the Fairchild BZX55C2V4–BZX55C56 datasheet table for the BZX55C9V1 entry - a key parameter for evaluating the BZX55C9V1_T26A's suitability in precision reference circuits.
BZX55C9V1_T26A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±6%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 7 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 100 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
BZX55C9V1_T26A FAQ
1.How can I place an order for BZX55C9V1_T26A through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX55C9V1_T26A 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 BZX55C9V1_T26A reliable?
The price and inventory of BZX55C9V1_T26A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX55C9V1_T26A is usually 5 days.
3.What payment methods are accepted for BZX55C9V1_T26A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX55C9V1_T26A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX55C9V1_T26A?
BZX55C9V1_T26A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX55C9V1_T26A 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 BZX55C9V1_T26A?
For technical support, including BZX55C9V1_T26A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX55C9V1_T26A requirements.
6.How does Aetrix verify that BZX55C9V1_T26A is sourced from the original manufacturer or authorized distributors?
All BZX55C9V1_T26A 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 BZX55C9V1_T26A meets industry standards.
7.What is the process for return or replacement of BZX55C9V1_T26A?
All BZX55C9V1_T26A units undergo pre-shipment inspection (PSI). If there is an issue with BZX55C9V1_T26A, 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 BZX55C9V1_T26A part is unused and in its original packaging.
Return procedure for BZX55C9V1_T26A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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