onsemi MMBZ5236BLT1

Overview

MMBZ5236BLT1 from onsemi is a 7.5 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board at 25°C, with 6 Ω dynamic impedance at 20 mA test current and 3 μA leakage current at 6 V reverse bias - used for precision voltage reference and overvoltage protection in portable power rails.

For engineers reviewing the MMBZ5236BLT1 datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal resistance (556 °C/W), ESD rating (>16 kV HBM), cathode-anode polarity marking, and compatibility with high-density SMT assembly on handheld and PC board designs.

Technical Context

This device operates as a two-terminal voltage regulator in reverse-biased mode, maintaining stable 7.5 V output across 1–20 mA Zener current range. Its 6 Ω Zener impedance at I_ZT = 20 mA ensures low regulation error under load variation, while its −65°C to +150°C junction temperature range supports operation in thermally constrained environments.

The SOT-23 package features a defined pinout (Pin 1: Anode, Pin 2: No Connection, Pin 3: Cathode) and UL 94 V-0 flammability rating. It delivers Class 3 ESD robustness (>16 kV HBM) and Pb-free, RoHS-compliant construction, meeting requirements for consumer portables and industrial edge nodes.

Key Specifications

Pinout & Package

SOT-23 (TO-236) surface-mount package, 2.90 × 1.30 × 1.00 mm body size, cathode indicated by band; void-free thermosetting plastic case with corrosion-resistant, solderable finish; UL 94 V-0 rated.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulation applications.

Compared with MMBZ5236BLT1, BZX84-C7V5 offers higher power margin at the cost of regulation accuracy, while MMBZ5236BS provides identical performance in non-reel packaging - enabling trade-offs between production volume, thermal performance, and assembly method without circuit redesign.

Availability

MMBZ5236BLT1 is available at Aetrix Electronics and suitable for smartphone power rail protection, USB interface voltage clamp, and industrial sensor signal conditioning requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for MMBZ5236BLT1 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 is a global semiconductor supplier specializing in energy-efficient silicon solutions for automotive, industrial, cloud, and IoT applications.

The MMBZ52xxBLT1G series was designed for space-constrained, high-density portable electronics requiring reliable, low-power voltage regulation and ESD-hardened protection in SOT-23 form factor.

FAQ

What is the Zener voltage tolerance of MMBZ5236BLT1?

The MMBZ5236BLT1 has a nominal Zener voltage of 7.5 V with a tolerance of ±5%, corresponding to a guaranteed range of 7.12 V to 7.88 V at 20 mA test current (I_ZT). This tolerance is specified per the onsemi datasheet Rev. 16 and applies under standard 25°C ambient conditions. The MMBZ5236BLT1 maintains this specification across its qualified operating temperature range.

Does MMBZ5236BLT1 have a built-in ESD protection rating?

Yes, the MMBZ5236BLT1 is rated for Class 3 Human Body Model (HBM) ESD protection, exceeding 16 kV. This rating is confirmed in the onsemi datasheet and reflects the device's ability to withstand electrostatic discharge events without degradation. The MMBZ5236BLT1 achieves this through optimized junction design and packaging - making it suitable for use in handheld and portable systems without additional external ESD components.

What is the thermal resistance (R_JA) of MMBZ5236BLT1 on FR-5 board?

The MMBZ5236BLT1 exhibits a junction-to-ambient thermal resistance (R_JA) of 556 °C/W when mounted on an FR-5 board at 25°C ambient temperature. This value is measured under standardized JEDEC conditions and defines how effectively heat transfers from the die to ambient air. Derating begins above 25°C at 1.8 mW/°C, meaning the MMBZ5236BLT1's usable power drops linearly as ambient temperature rises.

Is MMBZ5236BLT1 compatible with lead-free reflow soldering processes?

Yes, the MMBZ5236BLT1 is Pb-free and RoHS-compliant, with a maximum soldering temperature rating of 260°C for 10 seconds - fully compatible with standard lead-free reflow profiles (e.g., IPC/JEDEC J-STD-020). Its thermosetting plastic case and corrosion-resistant finish ensure reliability during repeated thermal cycling. The MMBZ5236BLT1 meets all mechanical and thermal requirements for automated SMT assembly without modification.

What does the "BLT1" suffix indicate in MMBZ5236BLT1?

The "BLT1" suffix in MMBZ5236BLT1 denotes the specific packaging and tape-and-reel configuration: "B" indicates the base series, "L" specifies the SOT-23 package (Case 318), and "T1" identifies the 3,000-unit tape-and-reel shipping format. This suffix distinguishes it from variants like MMBZ5236BLT3G (10,000/reel) or MMBZ5236BS (cut-tape). The MMBZ5236BLT1 is functionally identical to other members of the MMBZ5236x family except for packaging and reel orientation.