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Vishay General Semiconductor - Diodes Division BZX85C9V1-TR
- Part No.:
- BZX85C9V1-TR
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C9V1-TR.pdf
- Description:
- DIODE ZENER 9.1V 1.3W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:20,934
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Product details
Overview
BZX85C9V1-TR from Vishay is a silicon planar power Zener diode designed for voltage stabilization and clipping circuits requiring 1.3 W power dissipation, 8.5–9.6 V nominal Zener voltage at 6.8 mA test current, and DO-41 glass package with cathode band marking. It operates in industrial power supply regulation and overvoltage protection circuits.
For engineers reviewing the BZX85C9V1-TR datasheet, BZX85C9V1-TR pinout, BZX85C9V1-TR application, or BZX85C9V1-TR equivalent, key selection criteria include Zener voltage tolerance (±5 %), dynamic resistance (< 5 Ω at 6.8 mA), temperature coefficient (+0.035 to +0.075 %/°C), and thermal resistance (130 °C/W junction-to-ambient).
Technical Context
This device functions as a two-terminal voltage reference with sharp reverse breakdown at 9.1 V nominal. Its silicon planar construction ensures stable Zener characteristics under pulsed and DC conditions, with specified operation up to 175 °C junction temperature and storage from –55 °C to +175 °C.
The BZX85C9V1-TR exhibits low dynamic impedance (< 5 Ω at IZT = 6.8 mA) and controlled temperature coefficient (+0.035 to +0.075 %/°C), enabling predictable voltage regulation across ambient temperature variations without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.5–9.6 V at IZT = 6.8 mA - defines stable regulation range for mid-voltage rail clamping |
| Power Dissipation (Ptot) | 1.3 W - maximum continuous power handling at Tamb = 25 °C with leads held at ambient within 10 mm of case |
| Dynamic Resistance (rZT) | < 5 Ω at IZT = 6.8 mA - ensures minimal output voltage variation under load current changes |
| Temperature Coefficient (αVZ) | +0.035 to +0.075 %/°C - quantifies positive drift of Zener voltage with rising junction temperature |
| Reverse Leakage Current | < 1 µA at VR = 6.8 V - guarantees negligible standby current in high-impedance bias networks |
| Junction Temperature (Tj) | 175 °C - sets upper thermal limit for reliable long-term operation in enclosed or high-ambient environments |
| Thermal Resistance (RthJA) | 130 °C/W - determines temperature rise above ambient per watt dissipated; requires adequate PCB copper for derating |
Pinout & Package
Package: DO-41 glass axial package, 4.1 mm diameter × 26 mm length, cathode identified by single black band near one lead end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to circuit ground or lower-potential rail; forms reference return path during reverse breakdown |
| Cathode | Reverse breakdown terminal / regulated output node | Connected to voltage rail being stabilized; supplies regulated 9.1 V reference when reverse-biased above breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Silicon planar construction | Ensures repeatable Zener voltage grading per E24 standard and stable long-term parametric performance |
| 1.3 W power rating | Supports robust voltage clamping in transient suppression and linear regulator shunt applications |
| DO-41 glass package | Provides hermetic sealing, mechanical durability, and compatibility with wave soldering and axial through-hole assembly |
| ±5 % Zener voltage tolerance | Enables cost-effective selection for non-critical stabilization where tight regulation is not required |
| Low rZT < 5 Ω | Minimizes output impedance for improved line and load regulation in feedback or reference circuits |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing +9 V rail in analog sensor interface modules operating from unregulated 12 V input. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 9.1 V reference for op-amp biasing and ADC reference buffers. Use Value: Maintains <1 % output deviation across –40 to +85 °C ambient using inherent temperature coefficient and low rZT. |
Use Scenario: Clamping induced transients on microcontroller I/O lines exposed to relay coil back-EMF. IC Role / Device Role / Timing Role: Bidirectional transient suppressor limiting voltage excursions to ≤9.6 V peak during switching events. Use Value: Absorbs 1.3 W pulses without degradation, preventing latch-up or gate oxide damage in 3.3 V/5 V logic inputs. |
| DC Motor Driver Feedback Reference | Automotive Body Control Module (BCM) Voltage Monitor |
Use Scenario: Providing stable reference for current-sense amplifier in brushed DC motor H-bridge driver. IC Role / Device Role / Timing Role: Zener-based precision reference for gain-setting resistors in bidirectional current sensing. Use Value: Enables ±1 % current measurement accuracy over temperature due to predictable αVZ and low rZT. |
Use Scenario: Monitoring battery-supplied 9 V auxiliary rail in BCM for undervoltage lockout and brownout detection. IC Role / Device Role / Timing Role: Threshold detector element in comparator-based monitoring circuit with hysteresis. Use Value: Delivers repeatable 9.1 V trigger point with <1 µA leakage, minimizing quiescent current in always-on monitoring paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5240B | Surface-mount SOD-123 package, 10 V nominal, 0.5 W rating, ±5 % tolerance | Requires PCB redesign for SMT placement; unsuitable for high-power dissipation (>0.5 W) | Select when board space is constrained and power requirements are ≤0.5 W; verify thermal pad layout for reliability |
| STMicroelectronics BZT52-C9V1 | SOD-123 package, same 9.1 V rating and ±5 % tolerance, 0.5 W Ptot, RthJA = 500 °C/W | Limited to low-power bias/reference use; cannot replace BZX85C9V1-TR in 1.3 W applications without derating | Choose only for signal-level referencing where dissipation remains below 150 mW; confirm thermal margin in final layout |
Compared with MMBZ5240B and BZT52-C9V1, the BZX85C9V1-TR delivers 2.6× higher power handling and 3.8× lower thermal resistance in a through-hole DO-41 package-making it uniquely suitable for legacy industrial designs, high-reliability linear regulators, and transient clamping where axial mounting and robust thermal performance are required.
Availability
BZX85C9V1-TR is available at Aetrix Electronics and suitable for industrial power supply regulation, overvoltage protection circuits, DC motor driver feedback references, and automotive body control module voltage monitors requiring stable component supply and long-lifecycle support.
Supply support for BZX85C9V1-TR 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
Vishay Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements with emphasis on reliability, power handling, and industrial-grade specifications.
The BZX85-Series was developed for high-stability, medium-power voltage regulation and transient suppression in harsh-environment applications including industrial controls, power supplies, and automotive subsystems.
FAQ
What is the Zener voltage tolerance of the BZX85C9V1-TR?
The BZX85C9V1-TR has a nominal Zener voltage of 9.1 V with a tolerance of ±5 %, corresponding to a guaranteed range of 8.5–9.6 V at IZT = 6.8 mA. This tolerance aligns with the international E24 resistor standard and reflects the "C" suffix designation in the BZX85-Series family.
Can the BZX85C9V1-TR be used in surface-mount designs?
No-the BZX85C9V1-TR uses a DO-41 axial glass package intended for through-hole mounting. It is not compatible with SMT reflow or pick-and-place processes. For surface-mount alternatives, consider the SOD-123 packaged BZT52-C9V1 or MMBZ5240B, though both are limited to 0.5 W power dissipation.
What is the maximum allowable junction temperature for the BZX85C9V1-TR?
The absolute maximum junction temperature for the BZX85C9V1-TR is 175 °C, as specified in the Vishay BZX85-Series datasheet (Document Number 85607, Rev. 1.7). Operation beyond this temperature risks irreversible parametric shift or catastrophic failure.
How does the temperature coefficient affect regulation accuracy in the BZX85C9V1-TR?
The BZX85C9V1-TR exhibits a positive temperature coefficient of +0.035 to +0.075 %/°C, meaning its Zener voltage increases predictably with rising junction temperature. At 9.1 V nominal, this equates to +3.2 to +6.8 mV/°C drift-critical for applications requiring stable reference over wide temperature ranges.
Is the BZX85C9V1-TR RoHS compliant and halogen-free?
Yes-the BZX85C9V1-TR complies with RoHS Directive 2011/65/EU and is halogen-free per Vishay's material declarations. The device contains no ozone-depleting substances and meets JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for DO-41 packaging.
BZX85C9V1-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- BZX85
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 1.3 W
- Impedance (Max) (Zzt):
- 5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 6.8 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 175°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
BZX85C9V1-TR FAQ
1.How can I place an order for BZX85C9V1-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C9V1-TR 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-TR reliable?
The price and inventory of BZX85C9V1-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C9V1-TR is usually 5 days.
3.What payment methods are accepted for BZX85C9V1-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C9V1-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C9V1-TR?
BZX85C9V1-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C9V1-TR 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-TR?
For technical support, including BZX85C9V1-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C9V1-TR requirements.
6.How does Aetrix verify that BZX85C9V1-TR is sourced from the original manufacturer or authorized distributors?
All BZX85C9V1-TR 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-TR meets industry standards.
7.What is the process for return or replacement of BZX85C9V1-TR?
All BZX85C9V1-TR units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C9V1-TR, 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-TR part is unused and in its original packaging.
Return procedure for BZX85C9V1-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX85C9V1-TR Tags
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