Taiwan Semiconductor Corporation MMSZ4697 RHG

Overview

MMSZ4697 RHG from Taiwan Semiconductor is a 10 V, 500 mW surface-mount Zener diode in SOD-123 package, designed for precision voltage regulation and overvoltage protection in low-power circuits. It delivers a nominal zener voltage of 10 V at 50 mA test current, with ±5% tolerance (9.5–10.5 V), 1.0 µA leakage at 7.6 V reverse bias, and operates across –55°C to +150°C junction temperature range.

For engineers reviewing the MMSZ4697 RHG datasheet, MMSZ4697 RHG pinout, MMSZ4697 RHG application, or MMSZ4697 RHG equivalent, key selection criteria include its 10 V regulation accuracy, SOD-123 footprint compatibility, thermal resistance of 340°C/W on 5 cm × 5 cm Cu pad, and suitability for space-constrained, high-density PCB designs requiring stable reference or clamping.

Technical Context

The MMSZ4697 RHG functions as a two-terminal silicon junction device operating in reverse breakdown to maintain a stable reference voltage under varying load or supply conditions. Its zener impedance is optimized for low-current regulation (IZT = 50 mA), and it exhibits minimal voltage drift over temperature due to its specified TJ range of –55°C to +150°C.

Designed for surface-mount assembly, the device uses matte tin-plated leads compliant with J-STD-002 solderability standards and features a cathode band polarity indicator. Its moisture sensitivity level is rated J-STD-020 Level 1, enabling uncomplicated reflow processing without dry-pack requirements.

Key Specifications

Pinout & Package

Package: SOD-123 - compact 2.85 mm × 1.80 mm surface-mount plastic case with cathode band marking; RoHS-compliant, halogen-free, UL 94V-0 rated molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX584C10 and MMBZ5240BLT1G, the MMSZ4697 RHG offers superior power handling (500 mW), tighter leakage (1.0 µA), and proven thermal performance on standard PCB copper-making it optimal for industrial-grade regulation where reliability and margin matter.

Availability

MMSZ4697 RHG is available at Aetrix Electronics and suitable for power supply reference, overvoltage clamp, and low-power regulator applications requiring stable component supply, consistent parametric performance, and long-term manufacturability.

Supply support for MMSZ4697 RHG 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, analog ICs, and protection components for industrial, computing, and consumer markets.

The MMSZ4697 RHG belongs to TSC's MMSZ4678–MMSZ4716 family of 500 mW Zener diodes, engineered for high-reliability voltage regulation in space-constrained, thermally demanding applications where consistent breakdown characteristics and JEDEC-compliant packaging are essential.

FAQ

What is the nominal zener voltage and tolerance of the MMSZ4697 RHG?

The MMSZ4697 RHG has a nominal zener voltage of 10 V with a guaranteed range of 9.5 V to 10.5 V at 50 mA test current, corresponding to ±5% tolerance. This specification is validated per Taiwan Semiconductor's A2311 datasheet revision and applies across the full operating temperature range of –55°C to +150°C. The MMSZ4697 RHG maintains this regulation accuracy under typical PCB thermal conditions.

What package type and mounting method does the MMSZ4697 RHG use?

The MMSZ4697 RHG is housed in an SOD-123 surface-mount package with matte tin-plated leads compliant with J-STD-002 solderability standards. It features a visible cathode band for polarity identification and is qualified for standard reflow soldering profiles. The SOD-123 outline matches JEDEC DO-215, Variation AD, and supports automated pick-and-place assembly.

What is the maximum power dissipation and thermal resistance of the MMSZ4697 RHG?

The MMSZ4697 RHG has a maximum steady-state power dissipation of 500 mW at 25°C ambient, derated linearly above that temperature. Its junction-to-ambient thermal resistance is 340°C/W when mounted on a 5 cm × 5 cm copper pad, as defined in the official datasheet. This value directly determines safe operating current limits under elevated ambient conditions.

How does the leakage current of the MMSZ4697 RHG compare to similar 10 V Zener diodes?

The MMSZ4697 RHG specifies 1.0 µA maximum leakage current at 7.6 V reverse bias, measured at 25°C. This is significantly lower than alternatives like the MMBZ5240BLT1G (5 µA at same condition), making the MMSZ4697 RHG preferable in low-power, high-impedance reference circuits where leakage-induced error must be minimized.

Is the MMSZ4697 RHG compliant with environmental and safety standards?

Yes, the MMSZ4697 RHG is RoHS compliant and halogen-free, meeting EU Directive 2011/65/EU and IPC-1752 material declaration requirements. Its molding compound achieves UL 94V-0 flammability rating, and moisture sensitivity is rated J-STD-020 Level 1-enabling use in environmentally regulated industrial and consumer products without special handling.