STMicroelectronics BZW50-68B

Mfr. Part

BZW50-68B

Manufacturer

STMicroelectronics. Y-IC is a quality distributor for STMicroelectronics and we will provide you with the best products and services, fast support, and reliable supply

Detailed Description

High-energy bidirectional TVS diode from the ST BZW50 TRANSIL series

5 kW peak pulse power (10/1000 μs) for heavy surge environments

Axial through-hole R-6 package for robust, easy installation

Designed to protect 48–72 V class lines and similar interfaces from ESD, EFT, lightning, and inductive load switching

Lead-free and RoHS compliant, suitable for industrial and automotive-grade designs

Key Features

Bidirectional surge protection (B suffix), non-polarized two-lead device

Peak pulse power: 5000 W (10/1000 μs)

High surge current capability: up to ~382 A (8/20 μs) typical

Fast reaction time: sub-nanosecond avalanche response

TVS technology: silicon avalanche/Zener (TRANSIL)

Capacitance: ~1500 pF typical at 1 MHz

Through-hole R-6 axial package; easy retrofit in field equipment

Mounting: Through-hole; Packaging: Tape & Box (TB)

Series: BZW50, TRANSIL

Lead-free / RoHS compliant

Manufacturer standard lead time: ~30 weeks

Part status: Active

Available quantity reference: 6300 units; standard pack: 100 pcs

Key Advantages

Handles high-energy surges with stable clamping, protecting downstream electronics

Bidirectional design simplifies installation (no polarity concerns)

Rugged axial package tolerates mechanical stress and heat better than small SMD parts in harsh sites

Simple two-terminal solution reduces BOM complexity and board space compared to multi-component protection networks

Reliable, repeatable performance from ST’s proven TRANSIL platform

Cost-effective protection for medium to high voltage rails

Packaging

Tape & Box (TB)

Series: BZW50, TRANSIL

Lead-free / RoHS compliant

Manufacturer standard lead time: ~30 weeks

Part status: Active

Available quantity reference: 6300 units; standard pack: 100 pcs

Key Advantages

Handles high-energy surges with stable clamping, protecting downstream electronics

Bidirectional design simplifies installation (no polarity concerns)

Rugged axial package tolerates mechanical stress and heat better than small SMD parts in harsh sites

Simple two-terminal solution reduces BOM complexity and board space compared to multi-component protection networks

Reliable, repeatable performance from ST’s proven TRANSIL platform

Cost-effective protection for medium to high voltage rails

Packaging

Type: Tape & Box (TB) for efficient automated or manual assembly

Package/Case: R-6 axial (similar to large DO-27/P600 class)

Material: Molded epoxy body, tin-plated copper axial leads

Size (approximate for R-6): cylindrical body around 8–10 mm diameter, ~9–10 mm length; lead diameter ~0.8–1.0 mm; lead length typically ~25 mm

Pin configuration: 2 axial leads; bidirectional device (no polarity marking required)

Thermal characteristics: high thermal mass; junction operating range typically -55°C to +150…175°C; designed for short-duration surge energy dissipation

Electrical properties (typical): 5 kW peak pulse power (10/1000 μs), up to ~382 A (8/20 μs) surge; fast response <1 ns; capacitance ~1500 pF @ 1 MHz; intended standoff around the 68 V class; clamping voltage in the ~110–160 V range depending on waveform and current (consult datasheet for exact limits)

Moisture Sensitivity Level (MSL): Not applicable for axial through-hole parts

Lifecycle

Status: Active and in ongoing production; not nearing discontinuation to the best of current market knowledge

Close equivalents and alternatives (bidirectional, axial, high-power TVS):

• STMicroelectronics: BZW50-58B, BZW50-75B (neighboring voltage options in the same series)

• Littelfuse: 5KP68CA (5 kW, axial, bidirectional)

• Vishay: 5KP68CA

• onsemi: 5KP68CA

• Micro Commercial Components (MCC): 5KP68CA

Note: Electrical limits, clamping levels, and mechanical details vary by brand. For a precise cross or to discuss unidirectional variants (e.g., 5KP68A) or surface-mount options (e.g., SMCJ68CA at ~1.5 kW), please contact our sales team via the Y-IC website for tailored guidance

Key Application Areas

Power line and DC bus protection (48–72 V class systems)

Industrial controllers, PLCs, and I/O protection

Motor drives, inverters, and battery chargers

UPS and power distribution units

Telecom and networking equipment (base stations, repeaters)

Automotive and transportation (24/48 V systems, harness protection)

Relay coil suppression and inductive load surge mitigation

Outdoor and field-deployed equipment exposed to lightning and switching transients

Datasheet

Our website hosts the most authoritative datasheet for BZW50-68B. For accurate ratings, curves, mechanical dimensions, and application notes, we strongly recommend downloading the datasheet from this page

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