My Inquiry
My Account
onsemi BZX85C16-T50A
- Part No.:
- BZX85C16-T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C16-T50A.pdf
- Description:
- DIODE ZENER 16V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:18,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX85C16-T50A from onsemi is a 16 V, ±5% tolerance, 1.0 W axial-leaded Zener diode in DO-41 glass package, rated for 15.3–17.1 V zener voltage at 5 mA test current, with 15 Ω dynamic impedance and 0.5 μA max leakage at 12.5 V reverse bias - used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the BZX85C16-T50A datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, power derating above 50°C (6.67 mW/°C), thermal resistance (junction-to-lead), cathode band identification, and compatibility with through-hole PCB assembly for industrial linear regulators and analog reference circuits.
Technical Context
The BZX85C16-T50A operates as a silicon planar Zener diode optimized for stable voltage reference and shunt regulation. It maintains nominal 16 V breakdown under 5 mA zener test current (IZ), with specified minimum/maximum VZ of 15.3 V and 17.1 V at TA = 25°C.
Its DO-41 glass package supports junction temperatures from –65°C to +200°C and features a cathode band marking per JEDEC DO-204AL standard. Thermal derating begins at 50°C ambient, reducing power dissipation by 6.67 mW per °C above that point.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.3 V min / 17.1 V max at IZ = 5 mA - defines regulated output range for feedback networks |
| Tolerance | ±5% - ensures predictable clamping level across production lots |
| Power Dissipation (PD) | 1.0 W @ TA = 25°C - sets maximum continuous DC power handling in free-air |
| Zener Impedance (ZZ) | 15 Ω @ IZ = 5 mA - determines regulation stiffness under load transients |
| Leakage Current (IR) | 0.5 μA max @ VR = 12.5 V - guarantees low standby current in high-impedance bias networks |
| Operating Temp Range | –65°C to +200°C - enables use in automotive under-hood and industrial motor control environments |
| Package | DO-41 glass axial - provides hermetic sealing and mechanical robustness for manual or wave-solder assembly |
Pinout & Package
DO-41 glass axial package with cathode identified by a single color band near one lead end. Leads are unmarked anode/cathode terminals; cathode is the banded end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener operation; carries forward current up to 200 mA (VF ≤ 1.2 V) |
| Cathode | Zener breakdown terminal | Banded end; connected to higher-potential node during regulation; defines reference voltage node in shunt regulator topologies |
Key Features
| Feature | Design Value |
|---|---|
| Stable Zener voltage with tight 5% tolerance | Enables accurate voltage setting without post-calibration in fixed-output linear supplies |
| Low dynamic impedance (15 Ω) | Minimizes output voltage variation under changing load currents in reference divider networks |
| Hermetically sealed glass DO-41 package | Ensures long-term parameter stability and moisture resistance in harsh industrial environments |
| Wide operating temperature range (–65°C to +200°C) | Supports deployment in engine control units, power converters, and downhole instrumentation |
Applications
| Voltage Reference for Linear Regulators | Overvoltage Clamp in Power Supplies |
|---|---|
Use Scenario: Used in the feedback path of LM317-based adjustable regulators to set precise output voltage. IC Role / Device Role / Timing Role: Zener diode provides stable reference voltage to error amplifier input. Use Value: ±5% VZ tolerance and 15 Ω ZZ ensure output accuracy within ±2% and minimal load regulation error. |
Use Scenario: Placed across DC bus rails to limit transient overvoltage spikes in 24 V industrial power systems. IC Role / Device Role / Timing Role: Shunt clamp device conducting only when rail exceeds 17.1 V. Use Value: 1.0 W power rating absorbs short-duration surges without failure; 0.5 μA leakage avoids loading sensitive sensing circuits. |
| Signal Level Translation Interface | Analog Sensor Biasing Circuit |
Use Scenario: Clamps 0–20 V sensor output signals to 0–16 V range before ADC input in PLC analog modules. IC Role / Device Role / Timing Role: Bidirectional voltage limiter protecting downstream CMOS inputs. Use Value: Low 15 Ω ZZ preserves signal fidelity during clipping; DO-41 package allows compact board layout. |
Use Scenario: Provides stable 16 V bias to bridge sensor excitation circuitry in strain gauge measurement systems. IC Role / Device Role / Timing Role: Precision shunt reference supplying constant current to Wheatstone bridge. Use Value: Tight 5% tolerance ensures repeatable bridge excitation; –65°C to +200°C range supports operation in extreme ambient conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | 12 V nominal, ±5%, 1.0 W, DO-41 - lower VZ, same package and power rating | Suitable for 12 V regulator feedback, not direct replacement for 16 V requirement | Select only if system design permits 12 V reference; verify loop gain and output accuracy impact |
| BZX55C16 | 16 V nominal, ±5%, 500 mW, DO-35 - same VZ but 50% lower power rating and smaller package | Limited to low-power biasing; unsuitable for >500 mW dissipation scenarios | Use where space-constrained layouts exist and thermal budget allows; confirm derating curve compatibility |
Compared with BZX85C16-T50A, the 1N4742A offers identical form factor but targets 12 V systems, while the BZX55C16 matches voltage but sacrifices 500 mW power headroom and thermal robustness - making BZX85C16-T50A preferred for industrial 16 V regulation requiring sustained 1 W dissipation and wide temperature resilience.
Availability
BZX85C16-T50A is available at Aetrix Electronics and suitable for industrial power supplies, analog sensor interfaces, and automotive body control modules requiring stable component supply with full traceability and long-lifecycle support.
Supply support for BZX85C16-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
onsemi (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The BZX85 series belongs to onsemi's general-purpose Zener diode product line, engineered for reliable voltage regulation and transient suppression in cost-sensitive, high-volume applications with demanding environmental requirements.
FAQ
What is the zener voltage tolerance for BZX85C16-T50A?
The BZX85C16-T50A has a guaranteed ±5% zener voltage tolerance, meaning its breakdown voltage falls between 15.3 V and 17.1 V when tested at 5 mA zener current and 25°C ambient temperature. This tolerance is confirmed in the official onsemi datasheet revision 2 (October 2017) and applies to all units shipped under this part number.
Can BZX85C16-T50A be used in surface-mount designs?
No - the BZX85C16-T50A uses a DO-41 axial glass package with leads designed for through-hole mounting. It is not compatible with SMT reflow or pick-and-place processes. For surface-mount equivalents, consider the MMBZ5245B (SOT-23, 16 V) or BZX84-C16 (SOT-23), which differ in package, thermal performance, and test conditions.
What is the maximum power dissipation for BZX85C16-T50A at 75°C ambient?
At 75°C ambient, the BZX85C16-T50A must be derated from its 1.0 W rating at 25°C. With a derating factor of 6.67 mW/°C above 50°C, the allowable power drops to 1.0 W − (25°C × 6.67 mW/°C) = 833 mW. This value assumes proper lead length and thermal path per JEDEC DO-41 guidelines.
How is the cathode identified on BZX85C16-T50A?
The cathode of the BZX85C16-T50A is marked by a single color band (typically black or dark stripe) located near one end of the DO-41 glass body. This band aligns with the cathode lead - the terminal that connects to the higher-potential side during Zener operation - and conforms to JEDEC DO-204AL polarity marking standards.
Is BZX85C16-T50A suitable for automotive under-hood applications?
Yes - the BZX85C16-T50A is rated for junction temperatures from –65°C to +200°C and packaged in hermetically sealed glass, making it suitable for under-hood automotive use. Its 1.0 W power rating and stable 16 V regulation support engine control unit (ECU) voltage monitoring, sensor biasing, and transient suppression in high-temperature environments.
BZX85C16-T50A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 16 V
- Tolerance:
- ±6%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 11 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
BZX85C16-T50A FAQ
1.How can I place an order for BZX85C16-T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C16-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 BZX85C16-T50A reliable?
The price and inventory of BZX85C16-T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C16-T50A is usually 5 days.
3.What payment methods are accepted for BZX85C16-T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C16-T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C16-T50A?
BZX85C16-T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C16-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 BZX85C16-T50A?
For technical support, including BZX85C16-T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C16-T50A requirements.
6.How does Aetrix verify that BZX85C16-T50A is sourced from the original manufacturer or authorized distributors?
All BZX85C16-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 BZX85C16-T50A meets industry standards.
7.What is the process for return or replacement of BZX85C16-T50A?
All BZX85C16-T50A units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C16-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 BZX85C16-T50A part is unused and in its original packaging.
Return procedure for BZX85C16-T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX85C16-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…
