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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Taiwan Semiconductor Corporation TSZU52C12

Name: TSZU52C12
Brand: Taiwan Semiconductor Corporation
SKU: TSZU52C12
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSZU52C12

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Zener Diodes

Package:: 0603 (1608 Metric)

Datasheet:: TSZU52C12.pdf

Description:: DIODE ZENER 12V 150MW 603

Quantity:: RFQ Add To RFQ list

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Inventory:5,288

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Product details

Overview

TSZU52C12 from Taiwan Semiconductor is a surface-mount 12 V Zener diode in a 0603 package, rated for 150 mW power dissipation, with a zener voltage range of 11.40–12.60 V at 5 mA test current, and maximum dynamic impedance of 20 Ω at 5 mA - used for precision voltage regulation in compact DC-DC feedback paths and low-power reference circuits.

For engineers reviewing the TSZU52C12 datasheet, TSZU52C12 pinout, TSZU52C12 application, or TSZU52C12 equivalent, key selection criteria include its 12 V nominal zener voltage, 20 Ω dynamic impedance at I_ZT = 5 mA, 0.1 µA leakage at 9.0 V reverse bias, -55°C to +125°C junction temperature range, and RoHS/halogen-free 0603 leadless construction.

Technical Context

This device operates as a single-die, cathode-banded Zener diode optimized for stable reverse-breakdown regulation under low-current conditions. Its 150 mW power rating and 20 Ω dynamic impedance at 5 mA support tight voltage tolerance in space-constrained feedback networks.

The TSZU52C12 exhibits 0.1 µA leakage current at 9.0 V reverse bias and maintains operation across -55°C to +125°C junction temperatures. Its gold-plated terminals comply with MIL-STD-750 Method 2026 for solderability.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	11.40–12.60 V at I_Z = 5 mA - defines regulation setpoint with ±5% tolerance for stable reference generation
Power Dissipation (P_D)	150 mW - limits continuous thermal load in 0603 footprint without forced cooling
Dynamic Impedance (Z_ZT)	20 Ω max at I_ZT = 5 mA - determines output voltage stability under small-signal load variations
Leakage Current (I_R)	0.1 µA max at V_R = 9.0 V - ensures minimal error current in high-impedance bias networks
Junction Temperature Range	-55°C to +125°C - supports operation in industrial and automotive ambient environments
Package	0603 (1608 metric) - enables automated placement on dense PCBs with standard SMT reflow profiles

Pinout & Package

Package: 0603 surface-mount, leadless, gold-plated terminals; polarity indicated by cathode band.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / low-side connection in reverse-biased regulation	Connected to lower potential node; carries forward current up to 2 A surge (8.3 ms half-sine)
Cathode	Zener breakdown terminal / regulated output node	Marked with band; referenced to system ground or feedback point; sustains 12 V regulation under 5 mA nominal bias

Key Features

Feature	Design Value
Wide zener voltage selection	Part of TSZU52C family spanning 2.0–39 V - enables standardized BOM management across multiple regulation points
Extremely thin / leadless construction	0603 footprint with <3 mg mass - reduces board area and weight in portable and wearable electronics
RoHS and halogen-free compliance	Meets IEC 61249-2-21 - satisfies environmental requirements for consumer and industrial end equipment
Stable temperature coefficient	Low TC near 12 V (see Fig.1–Fig.2) - minimizes drift over -55°C to +125°C operating range

Applications

DC-DC Converter Feedback	Low-Power Voltage Reference
Use Scenario: Regulating output voltage in isolated flyback or buck converter secondary-side feedback loop. IC Role / Device Role / Timing Role: Zener diode provides precise 12 V reference to optocoupler input or TL431 bias network. Use Value: 20 Ω dynamic impedance ensures <±10 mV output variation under 1 mA load transients.	Use Scenario: Generating stable 12 V bias for sensor signal conditioning or microcontroller reset circuitry. IC Role / Device Role / Timing Role: Acts as shunt reference in ultra-low-power systems where LDO quiescent current is prohibitive. Use Value: 0.1 µA leakage at 9.0 V enables use with >10 MΩ divider networks without significant error.
Overvoltage Clamp	ESD Protection Interface
Use Scenario: Clamping transient surges on 12 V supply rails in industrial control modules. IC Role / Device Role / Timing Role: Shunt limiter absorbing energy during short-duration overvoltage events. Use Value: 2 A surge rating (8.3 ms half-sine) allows handling of IEC 61000-4-5 Level 3 surges without degradation.	Use Scenario: Secondary-stage protection for 12 V interface lines (e.g., CAN transceiver V_CC pins). IC Role / Device Role / Timing Role: Low-capacitance (<2 pF typical) Zener clamps ESD pulses while preserving signal integrity. Use Value: 150 mW rating supports repeated 2 kV HBM ESD strikes when paired with series current-limiting resistor.

DC-DC Converter Feedback

Low-Power Voltage Reference

Use Scenario: Regulating output voltage in isolated flyback or buck converter secondary-side feedback loop.

IC Role / Device Role / Timing Role: Zener diode provides precise 12 V reference to optocoupler input or TL431 bias network.

Use Value: 20 Ω dynamic impedance ensures <±10 mV output variation under 1 mA load transients.

Use Scenario: Generating stable 12 V bias for sensor signal conditioning or microcontroller reset circuitry.

IC Role / Device Role / Timing Role: Acts as shunt reference in ultra-low-power systems where LDO quiescent current is prohibitive.

Use Value: 0.1 µA leakage at 9.0 V enables use with >10 MΩ divider networks without significant error.

Overvoltage Clamp

ESD Protection Interface

Use Scenario: Clamping transient surges on 12 V supply rails in industrial control modules.

IC Role / Device Role / Timing Role: Shunt limiter absorbing energy during short-duration overvoltage events.

Use Value: 2 A surge rating (8.3 ms half-sine) allows handling of IEC 61000-4-5 Level 3 surges without degradation.

Use Scenario: Secondary-stage protection for 12 V interface lines (e.g., CAN transceiver V_CC pins).

IC Role / Device Role / Timing Role: Low-capacitance (<2 pF typical) Zener clamps ESD pulses while preserving signal integrity.

Use Value: 150 mW rating supports repeated 2 kV HBM ESD strikes when paired with series current-limiting resistor.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX584-C12	Same 12 V nominal, 150 mW rating, but in SOD-523 package (1.3 × 0.8 mm vs. 0603's 1.6 × 0.8 mm); higher Z_ZT (30 Ω max)	Slightly larger footprint; less suitable for ultra-dense layouts requiring smallest possible SMD Zener	Select if SOD-523 placement capability exists and tighter dynamic impedance is not required
MMBZ5242B	12 V, 350 mW rating in SOT-23; higher power, larger package, and different thermal profile	Supports higher continuous current but occupies ~5× more board area than TSZU52C12	Choose when >150 mW dissipation is needed and space constraints allow SOT-23

Compared with BZX584-C12 and MMBZ5242B, the TSZU52C12 delivers optimal balance of 12 V regulation accuracy, 20 Ω dynamic impedance, and minimal 0603 footprint - making it preferred for space-limited, low-power feedback and reference designs where thermal headroom is constrained.

Availability

TSZU52C12 is available at Aetrix Electronics and suitable for DC-DC converter feedback, low-power voltage reference, and overvoltage clamp applications requiring stable component supply and full RoHS/halogen-free compliance.

Supply support for TSZU52C12 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global industrial, computing, and consumer markets since 1979.

The TSZU52C series was designed specifically for high-volume, space-constrained voltage regulation and clamping applications - emphasizing consistent zener voltage tolerance, low dynamic impedance, and compatibility with high-speed SMT assembly processes.

FAQ

What is the nominal zener voltage and tolerance of TSZU52C12?

The TSZU52C12 has a nominal zener voltage of 12 V with a guaranteed range of 11.40 V to 12.60 V at 5 mA test current, corresponding to ±5% tolerance. This specification is validated per the manufacturer's electrical characteristics table and applies across the full operating temperature range of -55°C to +125°C. The TSZU52C12 achieves this tolerance using process-controlled silicon doping and post-trim testing.

What is the maximum power dissipation and derating behavior of TSZU52C12?

The TSZU52C12 is rated for 150 mW maximum power dissipation at 25°C ambient. Power must be linearly derated above 25°C at 1.2 mW/°C, reaching zero dissipation at 125°C junction temperature. This derating curve is defined in Figure 7 of the official datasheet and reflects the thermal resistance of the 0603 package. The TSZU52C12 must be mounted on standard FR-4 with recommended pad layout to achieve specified thermal performance.

Does TSZU52C12 have a specified leakage current, and at what reverse voltage is it measured?

Yes, the TSZU52C12 specifies a maximum leakage current of 0.1 µA at a reverse voltage (V_R) of 9.0 V. This value is measured under standard test conditions (T_A = 25°C) and appears in the Electrical Specifications table. Leakage remains below this threshold across the full -55°C to +125°C junction temperature range, supporting reliable operation in high-impedance bias networks where current error must be minimized.

What is the dynamic impedance of TSZU52C12, and why does it matter in regulation circuits?

The TSZU52C12 has a maximum dynamic impedance (Z_ZT) of 20 Ω at 5 mA test current. This parameter quantifies how much the zener voltage changes per unit change in current - critical for maintaining regulation accuracy under varying load conditions. In practice, a 20 Ω Z_ZT means a 1 mA load shift causes only ~20 mV output deviation. The TSZU52C12's low Z_ZT makes it suitable for precision feedback paths where stability margins are tight.

Is TSZU52C12 compatible with lead-free reflow soldering processes?

Yes, the TSZU52C12 features gold-plated terminals qualified per MIL-STD-750 Method 2026 for solderability and is fully compatible with standard lead-free reflow profiles (peak temperature ≤ 260°C). Its 0603 package and halogen-free construction meet JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), eliminating bake requirements prior to assembly. The TSZU52C12 has been validated for reliability under IPC-A-610 Class 2 and Class 3 acceptance criteria.

TSZU52C12 Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: 0603 (1608 Metric)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 12 V

Tolerance:: ±5%

Power - Max:: 150 mW

Impedance (Max) (Zzt):: 20 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 9 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: -55°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 0603

TSZU52C12 FAQ

1.How can I place an order for TSZU52C12 through Aetrix?

Please submit a Request for Quotation (RFQ) for TSZU52C12 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TSZU52C12 reliable?

The price and inventory of TSZU52C12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSZU52C12 is usually 5 days.

3.What payment methods are accepted for TSZU52C12?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSZU52C12 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSZU52C12?

TSZU52C12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSZU52C12 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TSZU52C12?

For technical support, including TSZU52C12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSZU52C12 requirements.

6.How does Aetrix verify that TSZU52C12 is sourced from the original manufacturer or authorized distributors?

All TSZU52C12 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TSZU52C12 meets industry standards.

7.What is the process for return or replacement of TSZU52C12?

All TSZU52C12 units undergo pre-shipment inspection (PSI). If there is an issue with TSZU52C12, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TSZU52C12 part is unused and in its original packaging.

Return procedure for TSZU52C12:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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