Toshiba Semiconductor and Storage CRZ27(TE85L,Q,M)

Overview

CRZ27(TE85L,Q,M) from Toshiba is a silicon epitaxial Zener diode designed for voltage regulation and surge absorption in compact surface-mount applications. It delivers a nominal Zener voltage of 27.0 V (min 24.3 V, max 29.7 V) at 10 mA test current, with 30 Ω typical Zener impedance, 0.7 W power dissipation, and operates across −40 to 150 °C junction temperature range - commonly used in power supply feedback loops and overvoltage protection circuits.

For engineers reviewing the CRZ27(TE85L,Q,M) datasheet, CRZ27(TE85L,Q,M) pinout, CRZ27(TE85L,Q,M) application, or CRZ27(TE85L,Q,M) equivalent, key selection criteria include verified Zener voltage tolerance, thermal derating behavior at elevated ambient temperatures, S-FLAT™ package land pattern compatibility, and reverse leakage current (≤10 μA at 19.0 V) under specified bias conditions.

Technical Context

The CRZ27(TE85L,Q,M) functions as a precision voltage reference and transient suppressor in low-power DC circuits. Its Zener voltage exhibits a positive temperature coefficient (α_T ≈ +23 mV/°C typical), enabling predictable drift compensation in temperature-stable designs. The device uses a planar silicon epitaxial structure optimized for stable breakdown characteristics and low noise.

Rated for 0.7 W average power dissipation at 25 °C, it requires thermal derating above 25 °C per Toshiba's PRSM–t_W curves and junction-to-ambient thermal resistance guidelines. Its S-FLAT™ package (Toshiba designation, JEITA 3-2A1S) supports reflow soldering on standard FR-4 PCBs with 6 mm × 6 mm copper pads for optimal thermal performance.

Key Specifications

Pinout & Package

CRZ27(TE85L,Q,M) is housed in Toshiba's S-FLAT™ surface-mount package (JEITA standard 3-2A1S), a 2-terminal, gull-wing leaded plastic case measuring 2.8 × 1.2 × 1.2 mm (L × W × H), weighing 0.013 g. Cathode is marked with a band on the body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CRZ27(TE85L,Q,M), BZX84-C27LT1G and MMBZ5252BLT1G offer tighter voltage tolerance but significantly lower power ratings (300–350 mW vs. 700 mW), making them unsuitable for continuous 27 V regulation in power supply feedback or surge-absorbing roles requiring sustained 0.7 W dissipation.

Availability

CRZ27(TE85L,Q,M) is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, programmable logic controller I/O protection, and sensor interface circuits requiring stable component supply with long-term lifecycle support.

Supply support for CRZ27(TE85L,Q,M) 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

Toshiba Electronic Devices & Storage Corporation is a Japanese semiconductor manufacturer specializing in discrete devices, power semiconductors, and logic ICs for industrial, automotive, and consumer applications.

The CRZ27(TE85L,Q,M) belongs to Toshiba's CRY62–CRZ39 Zener diode family, engineered for reliable voltage regulation and transient suppression in compact surface-mount power management and protection circuits.

FAQ

What is the Zener voltage tolerance of CRZ27(TE85L,Q,M) at 10 mA test current?

The CRZ27(TE85L,Q,M) has a Zener voltage range of 24.3 V (minimum) to 29.7 V (maximum) at I_Z = 10 mA, corresponding to a ±10% tolerance about the nominal 27.0 V value. This specification is guaranteed per Toshiba's Electrical Characteristics table and applies under Ta = 25 °C conditions. Designers must account for this full window when sizing series resistors or verifying regulation margins in actual circuits.

Does CRZ27(TE85L,Q,M) support reflow soldering, and what land pattern is recommended?

Yes, CRZ27(TE85L,Q,M) is qualified for Pb-free reflow soldering per J-STD-020. Toshiba recommends a 6 mm × 6 mm copper pad area on FR-4 boards to achieve optimal thermal performance and meet the 0.7 W power rating. The land pattern dimensions are documented in the "Land Pattern Dimensions" section of the official datasheet (Toshiba document CRY62 to CRZ39, page 1), and deviation may impair thermal derating capability.

What is the maximum reverse leakage current for CRZ27(TE85L,Q,M), and at what voltage is it measured?

The maximum reverse leakage current for CRZ27(TE85L,Q,M) is 10 μA, measured at a reverse voltage (V_R) of 19.0 V and Ta = 25 °C. This parameter ensures minimal quiescent current draw in high-impedance bias networks and is critical for low-power sensor interfaces or battery-backed systems where standby current must remain below 10 μA.

How does the temperature coefficient of CRZ27(TE85L,Q,M) affect its Zener voltage stability?

The CRZ27(TE85L,Q,M) exhibits a typical temperature coefficient (α_T) of +23 mV/°C, meaning its Zener voltage increases predictably with rising junction temperature. This positive drift allows designers to compensate for thermal effects in precision references - for example, pairing with a negative-coefficient component or adjusting feedback resistor ratios to maintain net zero drift across −40 to +125 °C operating ranges.

Can CRZ27(TE85L,Q,M) be used for surge protection, and what is its non-repetitive peak power rating?

Yes, CRZ27(TE85L,Q,M) is explicitly designated as a surge absorber. Its non-repetitive peak reverse power dissipation (PRSM) is 40 W for a 1 ms pulse width, per Toshiba's PRSM–t_W graph (page 4 of CRY62 to CRZ39). This makes it suitable for clamping short-duration transients like EFT bursts or inductive switch-off spikes, provided pulse repetition rate remains low enough to avoid thermal accumulation.