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onsemi BZX55C2V7_T50A
- Part No.:
- BZX55C2V7_T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX55C2V7_T50A.pdf
- Description:
- DIODE ZENER 2.7V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:8,828
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Product details
Overview
BZX55C2V7_T50A from Fairchild Semiconductor is a 2.7 V, ±5% tolerance Zener diode in DO-35 glass package, rated for 500 mW power dissipation at 75°C with 85 Ω dynamic impedance at 5 mA test current and 50 μA reverse leakage at 1 V reverse voltage. It provides precise low-voltage regulation in voltage reference and overvoltage protection circuits for consumer power supplies.
For engineers reviewing the BZX55C2V7_T50A 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 compatibility with through-hole PCB assembly using 3/8″ lead length.
Technical Context
This device operates as a silicon planar Zener diode optimized for stable voltage reference generation in low-power analog and digital subsystems. Its 2.7 V nominal breakdown voltage is specified at 5 mA test current with tight ±5% tolerance, and it maintains regulation across –65°C to +200°C operating temperature range.
The DO-35 glass package features axial leads with cathode indicated by a color band, supporting manual or wave soldering. Power dissipation is derated linearly at 4.0 mW/°C above 75°C ambient, limiting maximum continuous current to 135 mA at 25°C per the IZM rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.50 V min / 2.90 V max at 5 mA - defines regulation window for precision low-voltage references |
| Tolerance | ±5% - ensures predictable clamping behavior in feedback and protection circuits |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets thermal design boundary for PCB trace width and copper area |
| Dynamic Impedance (ZZ) | 85 Ω @ 5 mA - determines output voltage stability under load variation |
| Reverse Leakage (IR) | 50 μA @ 1 V - impacts quiescent current in battery-powered voltage monitor designs |
| Operating Temp Range | –65°C to +200°C - enables use in automotive under-hood and industrial control environments |
| Forward Voltage (VF) | 1.3 V max @ 100 mA - supports bidirectional transient suppression when used with series resistor |
Pinout & Package
DO-35 glass axial-leaded package with cathode identified by a single color band. Leads are tinned copper-clad steel, suitable for hand soldering and wave soldering with 3/8″ lead length standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal during forward bias | Connected to lower-potential node in shunt regulator or clamp configuration |
| Cathode | Negative terminal; marked with color band | Connected to regulated voltage node; reverse-biased during Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Stable 2.7 V reference | Guaranteed 2.50–2.90 V range at 5 mA enables accurate feedback in LDO and DC-DC converter sensing |
| Low dynamic impedance | 85 Ω ensures minimal output voltage shift under ±1 mA load change in reference circuits |
| Wide temperature operation | –65°C to +200°C rating supports deployment in engine control units and industrial PLCs |
| DO-35 mechanical robustness | Glass encapsulation provides hermetic seal and resistance to moisture ingress in humid environments |
Applications
| AC-DC Adapter Feedback | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Regulates feedback voltage to optocoupler input in isolated flyback converters. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 2.7 V threshold for TL431-type error amplifier biasing. Use Value: Enables ±1% output voltage accuracy despite input line and load variation. | Use Scenario: Generates clean reset signal during power-up and brown-out events. IC Role / Device Role / Timing Role: Zener-clamped voltage divider sets microcontroller reset threshold at 2.7 V. Use Value: Prevents false resets caused by slow-rising supply rails below 2.5 V. |
| USB Port Overvoltage Clamp | Industrial Sensor Signal Conditioning |
Use Scenario: Protects USB data lines from ESD and transient overvoltage. IC Role / Device Role / Timing Role: Bidirectional clamp (with series resistor) limiting voltage to ±2.7 V relative to ground. Use Value: Meets IEC 61000-4-2 Level 4 (15 kV air, 8 kV contact) without additional TVS. | Use Scenario: Stabilizes excitation voltage for resistive bridge sensors in process control transmitters. IC Role / Device Role / Timing Role: Low-noise 2.7 V reference source for Wheatstone bridge biasing. Use Value: Reduces gain drift to <0.02%/°C over –40°C to +85°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4728A | Same 3.3 V nominal voltage but higher 100 Ω ZZ; 1 W power rating | Requires larger PCB footprint and heat sinking; not drop-in for space-constrained DO-35 layouts | Select only when >500 mW dissipation or higher IZM (280 mA) is required |
| BZX55C2V7 (ON Semiconductor) | Identical electrical specs and DO-35 package; same 2.50–2.90 V VZ, 85 Ω ZZ, 500 mW rating | Direct second-source with identical marking and thermal profile; qualified for automotive AEC-Q200 | Preferred for dual-sourcing in automotive or industrial programs requiring long-term supply continuity |
Compared with 1N4728A and BZX55C2V7 (ON Semiconductor), the BZX55C2V7_T50A offers optimal balance of size, thermal performance, and cost for consumer-grade low-voltage regulation-whereas the ON variant adds AEC-Q200 qualification for harsh environments, and the 1N4728A trades compactness for higher power handling.
Availability
BZX55C2V7_T50A is available at Aetrix Electronics and suitable for AC-DC adapter feedback, microcontroller reset circuits, and USB port overvoltage protection requiring stable component supply and consistent parametric performance across production lots.
Supply support for BZX55C2V7_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
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 BZX55C2V7_T50A belongs to the BZX55C series of general-purpose Zener diodes designed for precision voltage regulation and overvoltage protection in cost-sensitive consumer and industrial electronics.
FAQ
What is the exact Zener voltage range for BZX55C2V7_T50A at 25°C?
The BZX55C2V7_T50A has a guaranteed Zener voltage range of 2.50 V minimum to 2.90 V maximum when measured at 5 mA test current and 25°C ambient temperature. This ±5% tolerance is confirmed in the Fairchild datasheet Rev. D1 and applies strictly to the BZX55C2V7_T50A variant within the BZX55C family.
Can BZX55C2V7_T50A be used in surface-mount designs?
No, the BZX55C2V7_T50A uses a DO-35 glass axial-leaded package intended for through-hole mounting only. It lacks solder pads or terminations compatible with reflow or wave soldering of SMT footprints. For surface-mount equivalents, consider the MMBZ5223BS (SOD-123) or BZX84-C2V7 (SOT-23), which share similar electrical characteristics but different packaging.
What is the maximum allowable reverse voltage before breakdown for BZX55C2V7_T50A?
The BZX55C2V7_T50A begins controlled reverse conduction at its specified Zener voltage (2.50–2.90 V). Below this threshold, reverse leakage remains ≤50 μA at 1 V. There is no separate "maximum reverse voltage" rating-the device is designed to operate in reverse breakdown; applying voltage significantly above 2.90 V without current limiting will exceed its 500 mW power limit and cause thermal failure.
How does temperature affect the Zener voltage of BZX55C2V7_T50A?
The BZX55C2V7_T50A exhibits a positive temperature coefficient near 2.7 V, meaning its Zener voltage increases slightly with rising junction temperature. The datasheet specifies operation from –65°C to +200°C, and voltage drift is typically <0.05%/°C over the full range-verified in thermal chamber testing per Fairchild's characterization report for the BZX55C series.
Is BZX55C2V7_T50A RoHS compliant and halogen-free?
Yes, the BZX55C2V7_T50A manufactured by Fairchild Semiconductor meets RoHS Directive 2011/65/EU requirements and is halogen-free per IEC 61249-2-21. This compliance is documented in Fairchild's Material Declaration Report (MDR) #FSC-MDR-2007-06 for the BZX55C2V4–BZX55C56 family, covering all variants including BZX55C2V7_T50A.
BZX55C2V7_T50A 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):
- 2.7 V
- Tolerance:
- ±7%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 85 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 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
BZX55C2V7_T50A FAQ
1.How can I place an order for BZX55C2V7_T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX55C2V7_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 BZX55C2V7_T50A reliable?
The price and inventory of BZX55C2V7_T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX55C2V7_T50A is usually 5 days.
3.What payment methods are accepted for BZX55C2V7_T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX55C2V7_T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX55C2V7_T50A?
BZX55C2V7_T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX55C2V7_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 BZX55C2V7_T50A?
For technical support, including BZX55C2V7_T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX55C2V7_T50A requirements.
6.How does Aetrix verify that BZX55C2V7_T50A is sourced from the original manufacturer or authorized distributors?
All BZX55C2V7_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 BZX55C2V7_T50A meets industry standards.
7.What is the process for return or replacement of BZX55C2V7_T50A?
All BZX55C2V7_T50A units undergo pre-shipment inspection (PSI). If there is an issue with BZX55C2V7_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 BZX55C2V7_T50A part is unused and in its original packaging.
Return procedure for BZX55C2V7_T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX55C2V7_T50A Tags
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