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onsemi BZX55C15_T50R
- Part No.:
- BZX55C15_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX55C15_T50R.pdf
- Description:
- DIODE ZENER 15V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:2,786
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Product details
Overview
BZX55C15_T50R from Fairchild Semiconductor is a 15 V, ±5% tolerance, 500 mW glass-passivated Zener diode in DO-35 package, rated for 27 mA maximum Zener current at 15.6 V, with 30 Ω dynamic impedance at 5 mA test current, used for voltage regulation and reference in low-power linear power supplies and overvoltage protection circuits.
For engineers reviewing the BZX55C15_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, power derating above 75°C, cathode identification via color band, junction temperature range (–65°C to +200°C), and compliance with JEDEC DO-35 mechanical outline.
Technical Context
The BZX55C15_T50R operates as a two-terminal voltage reference device relying on reverse-biased Zener breakdown. Its 15 V nominal regulation is specified at 5 mA test current, with 30 Ω dynamic impedance ensuring stable output under small-signal load variations.
Thermal performance is defined by 4.0 mW/°C derating above 75°C ambient, and its glass-encapsulated DO-35 package supports lead-free soldering while maintaining hermeticity for long-term stability in industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13.8 V min / 15.6 V max at IZ = 5 mA - defines usable regulation window under nominal bias |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets maximum continuous DC power handling before thermal shutdown risk |
| Dynamic Impedance (ZZ) | 30 Ω @ IZ = 5 mA - determines output voltage variation per mA of load current change |
| Max Reverse Current (IR) | 0.1 μA @ VR = 11 V - ensures minimal leakage in standby or high-impedance sensing nodes |
| Operating Temp Range | –65°C to +200°C - enables deployment in automotive under-hood or industrial motor control enclosures |
| Forward Voltage (VF) | 1.3 V max @ IF = 100 mA - supports use as clamping diode in bidirectional transient suppression |
Pinout & Package
DO-35 glass axial package with cathode identified by single black band; leads are tinned copper alloy, 0.46 mm diameter, 25.4 mm minimum length, compliant with JEDEC TO-204AA outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in forward bias; connected to lower potential during Zener operation | Provides return path for Zener current; must be routed to ground or common reference in shunt regulator topology |
| Cathode | Negative terminal in forward bias; higher-potential node during Zener conduction | Connected to input rail in shunt regulation; color band marks this terminal for unambiguous PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables precise voltage reference without post-production trimming in cost-sensitive consumer power rails |
| Glass passivation | Prevents moisture ingress and surface contamination, preserving long-term VZ stability in humid environments |
| DO-35 mechanical standardization | Ensures compatibility with automated axial component insertion equipment and legacy through-hole rework workflows |
| 27 mA maximum Zener current (IZM) | Supports reliable operation up to 405 mW instantaneous dissipation at 15 V, accommodating short-duration surge conditions |
Applications
| Low-Voltage Power Supply Regulation | Overvoltage Clamp in Signal Lines |
|---|---|
Use Scenario: Regulating 15 V rail for op-amp biasing and sensor excitation in battery-powered instrumentation. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 15 V reference point independent of load current up to 20 mA. Use Value: Maintains <±1% output deviation across –40°C to +85°C ambient due to low ZZ and tight VZ tolerance. | Use Scenario: Protecting ADC input pins from ESD transients exceeding 12 V in industrial data acquisition modules. IC Role / Device Role / Timing Role: Bidirectional clamping element limiting signal swing between –0.7 V and +15.6 V. Use Value: Leverages 1.3 V forward drop and 15 V reverse breakdown to confine analog inputs within safe operating area. |
| Reference Voltage for Comparator Circuits | Temperature-Stable Bias Generator |
Use Scenario: Setting trip threshold for undervoltage lockout (UVLO) in DC-DC converter enable logic. IC Role / Device Role / Timing Role: Precision voltage reference feeding non-inverting input of comparator with hysteresis. Use Value: Delivers repeatable 15 V threshold with <0.5% drift over 1000-hour life test at 85°C. | Use Scenario: Generating bias current for PTAT (proportional-to-absolute-temperature) circuitry in thermal monitoring ICs. IC Role / Device Role / Timing Role: Stable voltage source enabling predictable current mirror ratio across temperature. Use Value: Achieves <±100 ppm/°C TC over –25°C to +75°C due to matched Zener and substrate thermal coefficients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A | Same 15 V nominal, but ±5% tolerance and 1 Ω higher ZZ (31 Ω); 1 W rating vs. 500 mW | Higher power dissipation capability suits larger current shunt designs; requires larger PCB footprint | Select when >500 mW continuous dissipation is required and DO-41 package is acceptable |
| MMSZ5245B | Same 15 V nominal and ±5% tolerance, but SOD-123 surface-mount package; 500 mW rating; 30 Ω ZZ | Enables automated pick-and-place assembly and board space reduction; not suitable for through-hole prototyping | Select for volume production where reflow compatibility and miniaturization outweigh manual repair needs |
Compared with 1N4744A and MMSZ5245B, the BZX55C15_T50R offers identical voltage specification and ZZ in a legacy-compatible DO-35 through-hole package, making it optimal for service replacement, low-volume industrial repairs, and designs requiring proven long-term reliability in axial form factor.
Availability
BZX55C15_T50R is available at Aetrix Electronics and suitable for low-power voltage regulation, overvoltage clamping, and precision reference applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for BZX55C15_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
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.
The BZX55 series belongs to Fairchild's general-purpose Zener diode product line, designed specifically for cost-effective, reliable voltage regulation and reference in consumer, industrial, and computing power systems.
FAQ
What is the Zener voltage tolerance for BZX55C15_T50R?
The BZX55C15_T50R has a ±5% Zener voltage tolerance, meaning its regulated voltage falls between 13.8 V and 15.6 V when tested at 5 mA. This tolerance is guaranteed across the full operating temperature range and is marked on the device body as "15" with 5% band coding. The BZX55C15_T50R maintains this specification without requiring external calibration or trimming.
Can BZX55C15_T50R be used in surface-mount designs?
No - the BZX55C15_T50R uses a DO-35 axial glass package with 0.46 mm leads, intended exclusively for through-hole mounting. It is not compatible with reflow soldering or pick-and-place assembly. For surface-mount equivalents, consider the MMSZ5245B (SOD-123) or NZ9F15V (SOD-323), both offering identical 15 V ±5% regulation but different packaging and thermal profiles than the BZX55C15_T50R.
What is the maximum allowable junction temperature for BZX55C15_T50R?
The BZX55C15_T50R has a maximum junction temperature (TJ) of +200°C and a storage temperature range of –65°C to +200°C. Its power dissipation must be derated by 4.0 mW/°C above 75°C lead temperature. This allows sustained operation at elevated ambient temperatures when mounted with adequate thermal relief, confirming the BZX55C15_T50R's suitability for under-hood automotive or enclosed industrial environments.
How is cathode polarity identified on BZX55C15_T50R?
The cathode of the BZX55C15_T50R is marked by a single black band on the glass body, consistent with JEDEC DO-35 marking standards. This band aligns with the cathode terminal, which must be connected to the higher-potential node in Zener regulation mode. The BZX55C15_T50R's marking also includes "5C" on the second line and "15" on the third line, confirming its 15 V rating and C-grade (±5%) tolerance.
Does BZX55C15_T50R meet RoHS requirements?
Yes - the BZX55C15_T50R manufactured by Fairchild Semiconductor complies with RoHS Directive 2011/65/EU, containing no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits. Its glass encapsulation and tin-plated copper leads ensure full compatibility with lead-free soldering processes, and the BZX55C15_T50R carries appropriate compliance documentation per ON Semiconductor's post-acquisition quality system.
BZX55C15_T50R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±6%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 11 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
BZX55C15_T50R FAQ
1.How can I place an order for BZX55C15_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX55C15_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 BZX55C15_T50R reliable?
The price and inventory of BZX55C15_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX55C15_T50R is usually 5 days.
3.What payment methods are accepted for BZX55C15_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX55C15_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX55C15_T50R?
BZX55C15_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX55C15_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 BZX55C15_T50R?
For technical support, including BZX55C15_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX55C15_T50R requirements.
6.How does Aetrix verify that BZX55C15_T50R is sourced from the original manufacturer or authorized distributors?
All BZX55C15_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 BZX55C15_T50R meets industry standards.
7.What is the process for return or replacement of BZX55C15_T50R?
All BZX55C15_T50R units undergo pre-shipment inspection (PSI). If there is an issue with BZX55C15_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 BZX55C15_T50R part is unused and in its original packaging.
Return procedure for BZX55C15_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX55C15_T50R Tags
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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
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
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Diodes Incorporated
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MM5Z5V1ST1G
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Diodes Incorporated
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