My Inquiry
My Account
onsemi BZX55C16_T50A
- Part No.:
- BZX55C16_T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX55C16_T50A.pdf
- Description:
- DIODE ZENER 16V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:3,731
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX55C16_T50A from Fairchild Semiconductor is a 16 V, ±5% tolerance silicon Zener diode in DO-35 glass package, rated for 500 mW power dissipation at 75°C with 4.0 mW/°C derating, and specified for voltage regulation and overvoltage protection in low-power analog circuits.
For engineers reviewing the BZX55C16_T50A datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage accuracy (15.3–17.1 V), dynamic impedance (40 Ω @ 5 mA), reverse leakage (≤0.1 μA @ 12.8 V), maximum zener current (12 mA), and thermal stability across -65°C to +200°C operating range.
Technical Context
The BZX55C16_T50A operates as a two-terminal voltage reference device, maintaining stable reverse breakdown voltage under controlled test current (IZ = 5 mA). Its DO-35 glass package provides hermetic sealing and low parasitic capacitance (<2 pF), supporting precision regulation in signal conditioning and feedback loops.
It exhibits a nominal zener voltage of 16 V with 5% tolerance, dynamic impedance of 40 Ω at 5 mA, and reverse leakage current ≤0.1 μA at VR = 12.8 V (80% of VZ), meeting JEDEC standards for general-purpose Zener diodes in industrial and consumer electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.3–17.1 V @ IZ = 5 mA - defines regulated output voltage window for reference and clamp applications |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets maximum continuous power handling before thermal derating applies |
| Dynamic Impedance (ZZ) | 40 Ω @ IZ = 5 mA - determines regulation stiffness and sensitivity to load current changes |
| Reverse Leakage (IR) | ≤0.1 μA @ VR = 12.8 V - ensures minimal standby current in high-impedance bias networks |
| Max Zener Current (IZM) | 12 mA - derived from PD and VZ; limits safe DC current for sustained regulation |
| Operating Temp Range | -65°C to +200°C - supports deployment in automotive under-hood and industrial control environments |
| Forward Voltage (VF) | ≤1.3 V @ IF = 100 mA - enables use as polarity-sensitive clamp or ESD protection element |
Pinout & Package
DO-35 glass axial package with cathode band marking; two-terminal device requiring no external biasing - anode and cathode terminals defined by physical band orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connects to lower-potential node; used for ESD clamping or forward conduction paths |
| Cathode | Current exit terminal in forward bias; voltage reference node in reverse bias | Marked with color band; connects to regulated voltage rail or feedback point in shunt regulator |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables predictable regulation without post-production trimming in cost-sensitive designs |
| Hermetically sealed DO-35 package | Ensures long-term parameter stability and moisture resistance in harsh ambient conditions |
| Low dynamic impedance (40 Ω) | Minimizes output voltage deviation under varying load currents in shunt regulator topologies |
| High temperature operation (up to +200°C) | Supports reliability-critical applications where thermal margin exceeds standard plastic packages |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulators or op-amp reference circuits. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 16 V reference point. Use Value: Maintains output regulation within ±5% across temperature and line variations using only passive components. | Use Scenario: Protecting microcontroller I/O pins from transient surges exceeding 16 V. IC Role / Device Role / Timing Role: Bidirectional transient suppressor clamping positive excursions to 16 V and conducting reverse leakage <0.1 μA at 12.8 V. Use Value: Prevents latch-up or damage without loading normal operating signals due to ultra-low leakage. |
| Sensor Bias Network | ADC Input Protection |
Use Scenario: Providing stable excitation voltage for resistive sensors in industrial transmitters. IC Role / Device Role / Timing Role: Low-drift voltage source delivering 5 mA test current with <40 Ω output impedance. Use Value: Reduces measurement error from supply variation, enabling sub-0.5% total system accuracy. | Use Scenario: Limiting input voltage to 16 V on SAR ADC front-end to prevent internal ESD diode conduction. IC Role / Device Role / Timing Role: Precision clamp placed before RC anti-aliasing filter to avoid signal distortion. Use Value: Preserves signal integrity by activating only during overvoltage events while adding negligible capacitance (<2 pF). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A | 14 V nominal, 5% tolerance, DO-41 package, 1 W rating | Higher power rating but lower voltage; requires PCB layout change due to larger DO-41 footprint | Select when higher power dissipation (>500 mW) is required and board space allows larger package |
| MMSZ5245B | 16 V nominal, 5% tolerance, SOD-123 surface-mount package, 500 mW rating | Same electrical specs but SMT-compatible; lacks hermetic seal and high-temp capability (+150°C max) | Select for automated assembly and space-constrained PCBs where extended temperature range is not required |
Compared with 1N4744A and MMSZ5245B, the BZX55C16_T50A offers unique combination of 16 V regulation, DO-35 hermetic packaging, and +200°C operation-making it preferred for high-reliability, through-hole, high-temperature analog designs where long-term parameter drift must be minimized.
Availability
BZX55C16_T50A is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, and sensor biasing applications requiring stable component supply, consistent parametric performance, and long-term availability in legacy industrial systems.
Supply support for BZX55C16_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 devices before its acquisition by ON Semiconductor in 2016.
The BZX55 series belongs to Fairchild's general-purpose Zener diode product line, designed for cost-effective, reliable voltage regulation and transient suppression in consumer, industrial, and computing power supplies.
FAQ
What is the nominal zener voltage and tolerance of the BZX55C16_T50A?
The BZX55C16_T50A has a nominal zener voltage of 16 V with a ±5% tolerance, meaning its actual breakdown voltage falls between 15.3 V and 17.1 V when measured at 5 mA test current and 25°C. This tolerance is guaranteed per JEDEC specification and applies across the full operating temperature range of -65°C to +200°C. The BZX55C16_T50A maintains this specification in its DO-35 glass package without requiring external calibration.
What is the maximum power dissipation and thermal derating behavior of the BZX55C16_T50A?
The BZX55C16_T50A is rated for 500 mW power dissipation at lead temperature (TL) ≤ 75°C with 3/8" lead length. Above 75°C, it derates linearly at 4.0 mW/°C - for example, at TL = 100°C, maximum allowable power drops to 400 mW. This derating ensures junction temperature remains within safe limits. The BZX55C16_T50A's glass DO-35 package contributes to predictable thermal behavior in through-hole mounted designs.
How does the BZX55C16_T50A perform in reverse leakage and dynamic impedance specifications?
The BZX55C16_T50A exhibits ≤0.1 μA reverse leakage current at VR = 12.8 V (80% of nominal VZ), ensuring minimal current draw in high-impedance bias networks. Its dynamic impedance is 40 Ω at IZ = 5 mA, indicating moderate regulation stiffness - sufficient for general-purpose shunt references but less stable than low-Z Zeners like the BZX85 series. These values are confirmed in Fairchild's BZX55C2V4–BZX55C56 datasheet Rev. D1.
Is the BZX55C16_T50A suitable for high-temperature environments?
Yes, the BZX55C16_T50A is rated for operation from -65°C to +200°C, making it suitable for under-hood automotive, downhole instrumentation, and industrial control applications where plastic-packaged Zeners fail. Its DO-35 glass package provides hermetic sealing and superior thermal stability versus epoxy-encapsulated alternatives. The BZX55C16_T50A retains full electrical specification compliance across this entire range, including zener voltage tolerance and leakage performance.
What is the forward voltage characteristic of the BZX55C16_T50A?
The BZX55C16_T50A has a maximum forward voltage (VF) of 1.3 V at forward current (IF) = 100 mA, consistent with standard silicon PN junction behavior. This characteristic enables dual-use functionality: reverse-bias regulation and forward-bias clamping or polarity detection. Unlike Schottky diodes, the BZX55C16_T50A does not offer low VF advantage, but its symmetric bidirectional capability supports simple overvoltage protection circuits without additional components.
BZX55C16_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):
- 16 V
- Tolerance:
- ±6%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 12 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
BZX55C16_T50A FAQ
1.How can I place an order for BZX55C16_T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX55C16_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 BZX55C16_T50A reliable?
The price and inventory of BZX55C16_T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX55C16_T50A is usually 5 days.
3.What payment methods are accepted for BZX55C16_T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX55C16_T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX55C16_T50A?
BZX55C16_T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX55C16_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 BZX55C16_T50A?
For technical support, including BZX55C16_T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX55C16_T50A requirements.
6.How does Aetrix verify that BZX55C16_T50A is sourced from the original manufacturer or authorized distributors?
All BZX55C16_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 BZX55C16_T50A meets industry standards.
7.What is the process for return or replacement of BZX55C16_T50A?
All BZX55C16_T50A units undergo pre-shipment inspection (PSI). If there is an issue with BZX55C16_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 BZX55C16_T50A part is unused and in its original packaging.
Return procedure for BZX55C16_T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX55C16_T50A Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
