Diodes Incorporated 1.5KE7V5A-B

Overview

1.5KE7V5A-B from Diodes Incorporated is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, designed for primary overvoltage protection of DC power rails and signal lines. It features 6.40V reverse standoff voltage, 7.13–7.88V breakdown voltage at 10mA, 11.3V max clamping voltage at 132A peak pulse current, and operates from –55°C to +175°C.

For engineers reviewing the 1.5KE7V5A-B datasheet, 1.5KE7V5A-B pinout, 1.5KE7V5A-B application, or 1.5KE7V5A-B equivalent, key selection criteria include clamping voltage margin relative to protected IC V_DD, peak pulse current handling under IEC 61000-4-5 surge, thermal derating at elevated ambient, and axial lead solderability per MIL-STD-202.

Technical Context

This unidirectional TVS diode operates as a voltage-clamped crowbar during transients: it remains high-impedance below 6.40V VRWM, breaks down sharply between 7.13V and 7.88V at 10mA test current, and clamps to ≤11.3V while shunting up to 132A (1.0ms 8/20μs waveform). Its glass-passivated junction ensures stable leakage (<500μA at 6.40V) and repeatable breakdown.

The DO-201 axial package supports through-hole mounting with 9.5mm lead length, rated for 5.0W steady-state dissipation at TL=75°C and 1500W non-repetitive peak pulse power. Temperature coefficient of VBR is +0.061%/°C, enabling predictable clamping shift across –55°C to +175°C operating range.

Key Specifications

Pinout & Package

Package: DO-201 axial-leaded, transfer-molded epoxy (UL 94V-0), 1.12g typical weight, tin-plated leads solderable per MIL-STD-202 Method 208. Cathode identified by band marking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient suppression applications.

Compared with SMBJ7.0A and 1N6267A, the 1.5KE7V5A-B provides optimal balance of high-energy surge handling (1500W), precise 6.40V standoff, and industry-standard DO-201 mechanical compatibility-making it ideal for cost-sensitive, high-reliability industrial and automotive front-end protection where axial lead robustness and thermal mass matter.

Availability

1.5KE7V5A-B is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC input conditioning, and AC-DC adapter output safeguarding requiring stable component supply across extended product lifecycles.

Supply support for 1.5KE7V5A-B 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

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design, manufacturing, and distribution operations across Asia, the Americas, and Europe.

The 1.5KE series belongs to Diodes' high-power TVS portfolio, engineered specifically for robust, cost-effective overvoltage protection in automotive, industrial, and power supply applications where reliability under harsh electrical stress is mandatory.

FAQ

What does the "-B" suffix indicate in 1.5KE7V5A-B?

The "-B" suffix denotes bulk packaging: 1,000 pieces per bulk pack. This contrasts with "-T", which indicates 1,000-piece tape-and-reel packaging. The "A" suffix confirms unidirectional polarity; bidirectional variants use "CA". No functional or electrical difference exists between -B and -T versions.

Can 1.5KE7V5A-B be used in place of a Zener diode for voltage regulation?

No-it is not designed for continuous regulation. While it shares a PN junction, its 1500W surge rating prioritizes transient clamping over stable DC voltage reference. Its VBR tolerance (±7.8%) and positive tempco (+0.061%/°C) make it unsuitable for precision regulation; dedicated Zener diodes offer tighter tolerance and lower tempco.

Is 1.5KE7V5A-B qualified to AEC-Q101 for automotive use?

No-this specific part is not AEC-Q101 qualified. Diodes states that automotive-grade versions require explicit change control, PPAP capability, and IATF 16949 manufacturing; users needing AEC qualification must contact Diodes directly for designated automotive variants (e.g., part numbers with "AQ" suffix or specific automotive grade markings).

How does the DO-201 package affect thermal performance compared to SMC or SMB?

The DO-201's axial leads and larger epoxy body provide higher thermal mass and better steady-state power dissipation (5.0W at TL=75°C) than surface-mount SMB (1.0W) or SMC (1.5W) packages. However, its through-hole mounting requires more PCB area and limits automated assembly speed versus SMD alternatives.