Taiwan Semiconductor Corporation 1PGSMB5934H

Overview

1PGSMB5934H from Taiwan Semiconductor is a surface-mount silicon Zener diode with nominal zener voltage 24 V, 3 W power rating, 15.6 Ω dynamic impedance at 19 mA test current, and DO-214AA (SMB) package. It operates from −55 °C to +175 °C junction temperature and is AEC-Q101 qualified for automotive voltage regulation and reference applications.

For engineers reviewing the 1PGSMB5934H datasheet, 1PGSMB5934H pinout, 1PGSMB5934H application, or 1PGSMB5934H equivalent, key selection criteria include zener voltage tolerance (±5%), thermal resistance (R_θJA = 59 °C/W), low-inductance SMB package, moisture sensitivity level 1, and compliance with RoHS and halogen-free standards per IEC 61249-2-21.

Technical Context

The 1PGSMB5934H functions as a precision voltage reference and overvoltage clamp in DC power rails. Its photo-glass passivated junction ensures stable breakdown characteristics under thermal cycling, while its single-die DO-214AA construction supports automated placement and meets JESD201 Class 2 whisker resistance.

Designed for operation up to 175 °C junction temperature, it delivers 24 V ±5% regulation at 19 mA test current with 700 Ω maximum impedance at knee current (I_ZK = 0.25 mA) and leakage current ≤1 μA at 18.2 V reverse bias - enabling reliable performance in automotive body control modules and industrial sensor signal conditioning.

Key Specifications

Pinout & Package

Package: DO-214AA (SMB), surface-mount, cathode indicated by band, matte tin-plated leads solderable per J-STD-002, UL 94V-0 molding compound, weight ≈0.100 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ24A and BZT52-B24, the 1PGSMB5934H uniquely combines AEC-Q101 qualification, 3 W continuous power, low Z_ZT (15.6 Ω), and SMB package manufacturability - making it the only option among the three validated for automotive voltage reference and regulation in high-reliability systems.

Availability

1PGSMB5934H is available at Aetrix Electronics and suitable for automotive body control modules, industrial 4–20 mA transmitters, DC-DC converter feedback networks, and surge-protected I/O interfaces requiring stable component supply and full traceability.

Supply support for 1PGSMB5934H 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 automotive, industrial, and computing markets.

The 1PGSMB59xxH series is part of TSC's AEC-Q101-qualified Zener diode portfolio, engineered specifically for high-stability voltage reference and clamping in harsh-environment automotive and industrial power systems.

FAQ

What is the nominal zener voltage and tolerance of the 1PGSMB5934H?

The 1PGSMB5934H has a nominal zener voltage of 24 V with a tolerance of ±5%, meaning the actual V_Z falls between 22.80 V and 25.20 V at 19 mA test current and 25 °C ambient. This tolerance is guaranteed across the full operating temperature range and is verified per AEC-Q101 stress testing protocols. The 1PGSMB5934H achieves this specification using a photo-glass passivated junction for long-term parametric stability.

Is the 1PGSMB5934H suitable for automotive applications?

Yes, the 1PGSMB5934H is AEC-Q101 qualified and designed for automotive use. It supports junction temperatures from −55 °C to +175 °C, meets JESD201 Class 2 whisker resistance, and is moisture sensitivity level 1 - eliminating bake requirements before reflow. Its DO-214AA (SMB) package and matte tin plating ensure compatibility with automotive PCB assembly processes. The 1PGSMB5934H is deployed in body control modules, lighting drivers, and sensor power rails.

What is the maximum DC zener current (I_ZM) for the 1PGSMB5934H?

The maximum DC zener current (I_ZM) for the 1PGSMB5934H is 63 mA, calculated from its 3 W total power dissipation and nominal 24 V zener voltage (I_ZM = P_tot/V_Z). This value assumes operation at T_L = 75 °C on a 10 mm × 10 mm copper pad. Derating applies above 75 °C per the steady-state power derating curve. The 1PGSMB5934H maintains regulation integrity up to this current with Z_ZT = 15.6 Ω at I_ZT = 19 mA.

How does the thermal performance of the 1PGSMB5934H compare to standard SOD-123 Zeners?

The 1PGSMB5934H offers significantly better thermal performance than SOD-123 Zeners: its R_θJA is 59 °C/W versus ~350 °C/W for typical SOD-123 devices. This allows the 1PGSMB5934H to dissipate 3 W continuously at elevated ambient temperatures, whereas SOD-123 parts are typically limited to 500 mW. The DO-214AA (SMB) package's larger copper contact area and optimized leadframe design directly enable this improvement. The 1PGSMB5934H is rated for +175 °C junction temperature, exceeding most SOD-123 alternatives.

Does the 1PGSMB5934H have halogen-free and RoHS compliance documentation?

Yes, the 1PGSMB5934H is certified halogen-free per IEC 61249-2-21 and RoHS compliant. These declarations are documented in Taiwan Semiconductor's official product change notices and material declarations, which confirm bromine and chlorine content below 900 ppm and absence of restricted substances per EU Directive 2011/65/EU. The 1PGSMB5934H uses UL 94V-0 molding compound and matte tin-plated leads - both fully aligned with automotive OEM environmental requirements. Compliance applies to all production lots of the 1PGSMB5934H.