My Inquiry
My Account
Vishay General Semiconductor - Diodes Division BZT03C68-TR
- Part No.:
- BZT03C68-TR
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- SOD-57, Axial
- Datasheet:
-
BZT03C68-TR.pdf
- Description:
- DIODE ZENER 68V 1.3W SOD57
- Quantity:
- Payment:
- Shipping:
Inventory:6,152
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZT03C68-TR from Vishay Semiconductors is a 68 V, 10 mA zener diode in SOD-57 package, rated for 3.25 W steady-state power dissipation and 600 W non-repetitive surge power at 100 μs, used for medium-power voltage regulation and transient suppression in industrial power supplies and DC bus protection circuits.
For engineers reviewing the BZT03C68-TR datasheet, BZT03C68-TR pinout, BZT03C68-TR application, or BZT03C68-TR equivalent, key selection criteria include its 64–72 V zener voltage range at 10 mA test current, 51 Ω dynamic resistance, 0.08 %/K temperature coefficient, and clamping voltage of 94.4 V at 3.2 A RMS surge current.
Technical Context
This device operates as a single-element, glass-passivated, hermetically sealed zener diode optimized for stable voltage reference and fast clamping (picosecond-level response). Its thermal resistance of 100 K/W on PCB with 25 mm spacing enables reliable operation up to 175 °C junction temperature.
The BZT03C68-TR delivers precise regulation under DC bias and robust transient suppression during surge events, with reverse leakage limited to 1 μA at 56 V stand-off and dynamic impedance tightly controlled across production lots.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 64–72 V at IZT = 10 mA - defines stable regulation window for 68 V nominal systems |
| Power Dissipation (Ptot) | 1300 mW at Tamb = 25 °C - sets continuous DC power handling on standard PCB |
| Surge Power (PZSM) | 600 W at tp = 100 μs - supports high-energy transient absorption without failure |
| Dynamic Resistance (ZZ) | 25 Ω max at IZT = 10 mA - ensures low voltage deviation under load current variation |
| Clamping Voltage (VCL) | 94.4 V at IRMS = 3.2 A - determines maximum suppressed voltage during surge events |
| Temperature Coefficient | +0.08 %/K - enables predictable VZ drift over industrial temperature range |
Pinout & Package
SOD-57 surface-mount package: hermetically sealed, glass-passivated junction, UL 94 V-0 molding compound, MSL level 1, weight 369 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Surge return path | Connected to system ground or low-side reference during clamping |
| Cathode | Zener breakdown terminal / Voltage reference node | Connected to protected rail; maintains regulated voltage during reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable long-term VZ performance and reduced parameter drift over time and temperature |
| Hermetically sealed SOD-57 package | Provides moisture and contamination immunity for harsh industrial environments |
| Clamping time in picoseconds | Ensures sub-nanosecond response to fast transients such as ESD or switching spikes |
| Non-repetitive surge power rating | 600 W capability allows single-event protection against high-energy surges without derating |
Applications
| Industrial Power Supply Regulation | DC Bus Transient Suppression |
|---|---|
Use Scenario: Stabilizing 68 V reference in isolated auxiliary supplies for PLC I/O modules. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp and regulate output voltage. Use Value: Maintains ±3% regulation tolerance across 0–10 mA load range with <25 Ω dynamic impedance. | Use Scenario: Protecting 60–75 V DC bus in motor drive inverters from IGBT switching transients. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing surge energy before it reaches downstream MOSFETs. Use Value: Clamps to ≤94.4 V at 3.2 A RMS, limiting stress on 100 V-rated power devices. |
| Automotive Body Control Module | Telecom Line Interface Protection |
Use Scenario: Regulating 68 V bias rail for CAN FD transceivers in 24 V vehicle architectures with load dump. IC Role / Device Role / Timing Role: Dual-role zener: DC regulator during normal operation and surge clamp during ISO 7637-2 pulse 5a events. Use Value: Withstands 600 W surge at 100 μs while maintaining 175 °C max junction temperature. | Use Scenario: Protecting Ethernet PHY interface circuitry connected to outdoor copper lines subject to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff protector holding line at 56 V until surge exceeds threshold, then clamping to 94.4 V. Use Value: Reverse leakage <1 μA at 56 V ensures minimal standby power loss in always-on interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5365B | Same 68 V nominal VZ, but DO-41 package (larger footprint, higher RthJA = 120 K/W) | Less suitable for space-constrained PCBs; lower surge power density due to thermal limitations | Prefer BZT03C68-TR for SMT automation and higher power density requirements |
| SMBJ68A | TVS diode (not zener), 68 V standoff, 100 W peak power, unidirectional | Designed for transient-only suppression, not DC regulation; no stable VZ specification | Select BZT03C68-TR when both regulation and clamping are required in same node |
Compared with 1N5365B and SMBJ68A, the BZT03C68-TR uniquely combines precision DC regulation (64–72 V at 10 mA) with high-surge capability (600 W) in a compact SOD-57 package, enabling dual-function use in space-limited industrial and automotive power nodes.
Availability
BZT03C68-TR is available at Aetrix Electronics and suitable for industrial power supplies, DC bus protection, automotive body control modules, and telecom line interface circuits requiring stable component supply and traceable sourcing.
Supply support for BZT03C68-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 manufacturer of discrete semiconductors and passive components, specializing in high-reliability, high-performance devices for industrial, automotive, and computing markets.
The BZT03-Series is designed specifically for medium-power voltage regulation and transient suppression in demanding environments where stability, surge resilience, and hermetic reliability are critical.
FAQ
What is the zener voltage tolerance of BZT03C68-TR at its rated test current?
The BZT03C68-TR has a zener voltage range of 64 V (min) to 72 V (max) at IZT = 10 mA, corresponding to a ±5.9% tolerance around the nominal 68 V rating. This tight spread ensures consistent regulation performance across production lots without requiring binning for most industrial applications.
Can BZT03C68-TR be used for both DC regulation and transient suppression in the same circuit?
Yes, the BZT03C68-TR is explicitly designed for dual use: as a stable voltage reference under DC bias (1300 mW continuous) and as a fast-acting transient suppressor (600 W non-repetitive surge). Its glass-passivated junction and hermetic SOD-57 package ensure parameter stability across both operating modes in the BZT03C68-TR.
What is the maximum clamping voltage of BZT03C68-TR during a surge event?
The BZT03C68-TR clamps to 94.4 V at an RMS surge current of 3.2 A, as specified in the "Clamping (1)" column of the Electrical Characteristics table. This value is measured under standardized 10/1000 μs exponential waveform conditions and defines the upper voltage limit imposed on protected circuitry during transient events.
Is BZT03C68-TR compatible with lead-free reflow soldering processes?
Yes, the BZT03C68-TR's SOD-57 package is qualified for lead-free reflow with a peak temperature of up to 260 °C, per J-STD-020. Its UL 94 V-0 molding compound and MSL level 1 rating allow unlimited floor life and single reflow exposure without preconditioning, simplifying manufacturing for the BZT03C68-TR.
How does the temperature coefficient affect BZT03C68-TR's regulation accuracy over temperature?
The BZT03C68-TR has a temperature coefficient of +0.08 %/K, meaning its zener voltage increases by approximately 54 mV per 10 °C rise above 25 °C. This predictable positive drift allows designers to compensate for thermal effects in precision references, and remains within acceptable limits for most industrial regulation tasks using the BZT03C68-TR.
BZT03C68-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- BZT03
- Package/Case:
- SOD-57, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 68 V
- Tolerance:
- ±5.88%
- Power - Max:
- 1.3 W
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 51 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 500 mA
- Operating Temperature:
- 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- SOD-57
BZT03C68-TR FAQ
1.How can I place an order for BZT03C68-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT03C68-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 BZT03C68-TR reliable?
The price and inventory of BZT03C68-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT03C68-TR is usually 5 days.
3.What payment methods are accepted for BZT03C68-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT03C68-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT03C68-TR?
BZT03C68-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT03C68-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 BZT03C68-TR?
For technical support, including BZT03C68-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT03C68-TR requirements.
6.How does Aetrix verify that BZT03C68-TR is sourced from the original manufacturer or authorized distributors?
All BZT03C68-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 BZT03C68-TR meets industry standards.
7.What is the process for return or replacement of BZT03C68-TR?
All BZT03C68-TR units undergo pre-shipment inspection (PSI). If there is an issue with BZT03C68-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 BZT03C68-TR part is unused and in its original packaging.
Return procedure for BZT03C68-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT03C68-TR 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
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
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…
