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Taiwan Semiconductor Corporation BZT52C27-G RHG
- Part No.:
- BZT52C27-G RHG
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C27-G RHG.pdf
- Description:
- DIODE ZENER 27V 350MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
BZT52C27-G from Taiwan Semiconductor is a 27 V, ±5% tolerance surface-mount Zener diode in SOD-123 package, rated for 350 mW power dissipation and operating across –55°C to +150°C junction temperature range; it provides precise voltage regulation in low-power supply rails and reference circuits.
For engineers reviewing the BZT52C27-G datasheet, BZT52C27-G pinout, BZT52C27-G application, or BZT52C27-G equivalent, key selection criteria include its 25.1–28.9 V zener voltage range at 2 mA test current, 80 Ω dynamic impedance, 0.1 µA leakage at 18.9 V, and SOD-123 mechanical compatibility with automated PCB assembly.
Technical Context
The BZT52C27-G operates as a single-die, cathode-banded Zener diode optimized for stable reverse-breakdown regulation under low-current conditions (IZT = 2 mA). Its thermal resistance of 357°C/W and 150°C max junction temperature support reliable operation in compact, thermally constrained layouts.
It exhibits a positive temperature coefficient of +21.4 mV/°C at IZTC = 2 mA and maintains ≤0.1 µA leakage current at VR = 25.3 V, enabling accurate biasing in precision analog references and overvoltage clamping where stability at elevated temperatures matters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 25.1–28.9 V at IZT = 2 mA - defines regulation window for 27 V nominal rail stabilization |
| Power Dissipation (PD) | 350 mW - sets maximum continuous power handling in ambient conditions without derating |
| Zener Impedance (ZZT) | 80 Ω at IZT = 2 mA - indicates voltage regulation stiffness under small-signal load variations |
| Leakage Current (IR) | ≤0.1 µA at VR = 25.3 V - ensures minimal parasitic current in high-impedance sensing nodes |
| Junction Temperature Range | –55°C to +150°C - supports operation in automotive under-hood and industrial control environments |
| Package | SOD-123 - standard 2-pin surface-mount outline compatible with IPC-7351B footprint and reflow profiles |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - enables use as low-drop rectifier or ESD clamp in bidirectional protection schemes |
Pinout & Package
Package: SOD-123 - molded plastic case with matte tin-plated leads, polarity indicated by cathode band, weight ≈10.55 mg, UL 94V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to lower-potential node in regulation circuit; forms reference return path |
| Cathode | Zener breakdown terminal / voltage reference output | Connected to regulated node; voltage develops across cathode-to-anode during reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Ensures tight regulation band (25.1–28.9 V) without post-production trimming |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow, reducing manufacturing overhead |
| RoHS and halogen-free compliance | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green electronics |
| JESD 201 Class 1A whisker resistance | Prevents tin whisker growth in long-life industrial deployments |
| 357°C/W junction-to-ambient thermal resistance | Enables thermal modeling for board-level reliability in sealed enclosures |
Applications
| Overvoltage Protection in Sensor Interfaces | Low-Power Voltage Reference for ADC Biasing |
|---|---|
Use Scenario: Protecting 3.3 V or 5 V analog sensor outputs from transient surges up to 30 V. IC Role / Device Role / Timing Role: Zener clamp limiting input voltage to safe levels before signal conditioning stage. Use Value: Leverages 27 V breakdown to absorb energy while maintaining sub-0.1 µA leakage below trip threshold. |
Use Scenario: Providing stable reference voltage for 12-bit SAR ADCs in battery-powered data loggers. IC Role / Device Role / Timing Role: Precision shunt reference generating fixed 27 V node for ratiometric scaling. Use Value: ±5% tolerance and +21.4 mV/°C TC enable predictable drift compensation in firmware calibration. |
| Power Supply Rail Clamp in IoT Edge Nodes | Feedback Divider Stabilization in DC-DC Converters |
Use Scenario: Clamping auxiliary 24 V supply rail against load dump spikes in smart metering modules. IC Role / Device Role / Timing Role: Shunt regulator absorbing excess energy during transient overvoltage events. Use Value: 350 mW rating and SOD-123 thermal profile sustain short-duration 200 ms surges without failure. |
Use Scenario: Stabilizing feedback voltage divider in isolated flyback converters targeting 27 V output. IC Role / Device Role / Timing Role: Zener referenced across lower resistor to fix divider ratio against temperature drift. Use Value: Low 80 Ω impedance minimizes divider current variation, improving output regulation accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5256BS-7-F | Zener voltage 27 V ±5%, but rated for only 200 mW PD and higher ZZT = 100 Ω at 20 mA | Lower power handling limits surge absorption capability in clamping roles | Select when board space requires SOT-23 and thermal load remains below 150 mW |
| 1N4748A | Through-hole DO-41 package, 1 W PD, 27 V ±5%, ZZT = 20 Ω at 21 mA | Requires manual insertion or wave soldering; unsuitable for fully SMT lines | Choose for high-energy transient suppression where SOD-123 thermal limits are exceeded |
Compared with MMBZ5256BS-7-F and 1N4748A, the BZT52C27-G delivers optimal balance of SMT compatibility, 350 mW power margin, and 80 Ω impedance for mid-range regulation tasks-neither over-engineered nor thermally constrained.
Availability
BZT52C27-G is available at Aetrix Electronics and suitable for overvoltage protection, precision voltage reference, and DC-DC feedback stabilization requiring stable component supply across automotive, industrial, and IoT production programs.
Supply support for BZT52C27-G 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 and consumer markets.
The BZT52C series was designed specifically for cost-sensitive, high-volume surface-mount voltage regulation-emphasizing J-STD-020 Level 1 moisture robustness, RoHS/halogen-free compliance, and tight parametric consistency across 2.4–75 V variants.
FAQ
What is the zener voltage tolerance of the BZT52C27-G?
The BZT52C27-G has a ±5% zener voltage tolerance, resulting in a guaranteed breakdown range of 25.1 V to 28.9 V at a test current of 2 mA. This tolerance is confirmed in the Electrical Specifications table on page 2 of the official Taiwan Semiconductor datasheet revision C2007. The BZT52C27-G achieves this specification without requiring binning or post-manufacturing sorting.
Does the BZT52C27-G meet RoHS and halogen-free requirements?
Yes, the BZT52C27-G is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the FEATURES section of the Taiwan Semiconductor datasheet. The molding compound, plating, and internal materials have been validated to meet both directives, and the device carries the "-G" suffix denoting green compliance. This applies directly to the BZT52C27-G, not just the family.
What is the maximum power dissipation for the BZT52C27-G at room temperature?
The BZT52C27-G has an absolute maximum power dissipation (PD) of 350 mW at TA = 25°C, as specified in the Absolute Maximum Ratings table. Derating begins above 25°C at 2.8 mW/°C, consistent with its 357°C/W junction-to-ambient thermal resistance. This rating is measured under free-air conditions and assumes proper PCB copper area per the recommended SOD-123 pad layout.
How is polarity identified on the BZT52C27-G package?
Polarity on the BZT52C27-G is indicated by a visible cathode band printed on the SOD-123 body - the banded end corresponds to the cathode terminal. This marking is defined in the MECHANICAL DATA section and verified in the Package Outline Dimensions drawing. The anode is the unmarked end, and correct orientation is essential for proper reverse-bias operation in regulation or clamping circuits.
What is the leakage current specification for the BZT52C27-G at 25.3 V?
The BZT52C27-G specifies a maximum leakage current (IR) of 0.1 µA at VR = 25.3 V, as listed in the Electrical Specifications table. This value is measured at TA = 25°C and reflects the device's ability to remain effectively open-circuit below its nominal zener voltage. The BZT52C27-G maintains this performance across its full operating temperature range.
BZT52C27-G RHG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 18.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
BZT52C27-G RHG FAQ
1.How can I place an order for BZT52C27-G RHG through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C27-G RHG 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 BZT52C27-G RHG reliable?
The price and inventory of BZT52C27-G RHG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C27-G RHG is usually 5 days.
3.What payment methods are accepted for BZT52C27-G RHG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C27-G RHG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C27-G RHG?
BZT52C27-G RHG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C27-G RHG 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 BZT52C27-G RHG?
For technical support, including BZT52C27-G RHG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C27-G RHG requirements.
6.How does Aetrix verify that BZT52C27-G RHG is sourced from the original manufacturer or authorized distributors?
All BZT52C27-G RHG 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 BZT52C27-G RHG meets industry standards.
7.What is the process for return or replacement of BZT52C27-G RHG?
All BZT52C27-G RHG units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C27-G RHG, 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 BZT52C27-G RHG part is unused and in its original packaging.
Return procedure for BZT52C27-G RHG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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