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Taiwan Semiconductor Corporation BZD27C56PW
- Part No.:
- BZD27C56PW
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- SOD-123W
- Datasheet:
-
BZD27C56PW.pdf
- Description:
- DIODE ZENER 56V 1W SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:6,870
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Product details
Overview
BZD27C56PW from Taiwan Semiconductor is a 1W, 56V nominal Zener diode in SOD-123W package, designed for precision voltage regulation and transient overvoltage protection. It delivers 53.2–58.8V zener voltage at 10mA test current, exhibits 2000Ω dynamic impedance, and supports 78.6V clamping voltage under 10/1000μs surge conditions - used in power supply feedback loops and ESD-sensitive analog front-ends.
For engineers reviewing the BZD27C56PW datasheet, BZD27C56PW pinout, BZD27C56PW application, or BZD27C56PW equivalent, key selection criteria include its 56V nominal zener voltage, 10mA test current, 2000Ω zener impedance, -55°C to +175°C operating range, and SOD-123W low-profile surface-mount package compatibility with automated assembly.
Technical Context
The BZD27C56PW operates as a single-die silicon Zener diode optimized for stable reverse-bias voltage reference and transient suppression. Its design integrates low leakage current (≤1.9µA at 43V), tight zener voltage tolerance (±5% around 56V), and high surge capability (100W non-repetitive peak pulse power for 10/1000μs waveform).
Thermal performance is defined by junction-to-ambient resistance of 85°C/W and junction-to-lead resistance of 22°C/W, enabling reliable operation up to 175°C junction temperature. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 53.2–58.8V at 10mA - defines precise regulation window for feedback or reference circuits |
| Power Dissipation Ptot | 1.0W at 25°C ambient - sets continuous thermal limit on PCB with 5mm×5mm Cu pad |
| Zener Impedance ZZT | 2000Ω max at 10mA - indicates voltage stability under varying load current |
| Clamping Voltage VC | 78.6V at 10/1000μs waveform - determines maximum transient voltage seen by protected circuit |
| Junction Temperature Range | -55°C to +175°C - enables use in automotive under-hood and industrial motor control environments |
| Leakage Current IR | ≤1.9µA at 43V - ensures minimal parasitic loading in high-impedance reference paths |
| Temperature Coefficient αVZ | 0.09–0.13%/°C - quantifies zener voltage drift across operating temperature range |
Pinout & Package
Package: SOD-123W - low-profile surface-mount case with matte tin-plated leads, UL 94V-0 molding compound, and cathode band polarity indicator. Weight: 0.016g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-bias regulation configuration |
| Cathode | Zener breakdown terminal | Connected to higher-potential node; marked by visible cathode band on package |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMD package | SOD-123W footprint enables dense PCB layouts and reflow-compatible assembly |
| High surge robustness | 100W non-repetitive peak pulse power (10/1000μs) protects downstream ICs from ESD and load dump |
| Stable zener voltage | ±5% tolerance and 0.09–0.13%/°C tempco ensure predictable regulation across temperature |
| Ultra-low leakage | ≤1.9µA at 43V minimizes error in precision reference and sensing applications |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive for eco-conscious manufacturing |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference element setting precise 56V threshold for TL431-like comparator input. Use Value: Tight 53.2–58.8V tolerance and low tempco maintain ±1% output accuracy over -40°C to +125°C ambient. | Use Scenario: Providing stable bias voltage to bridge-based pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric ADC excitation. Use Value: ≤1.9µA leakage prevents loading errors in high-impedance sensor bridges; 175°C max TJ supports operation near motors. |
| Automotive Load Dump Protection | ESD-Sensitive Interface Clamping |
Use Scenario: Suppressing 12V system transients during alternator load dump events in body control modules. IC Role / Device Role / Timing Role: Transient voltage suppressor placed across microcontroller supply rail. Use Value: 78.6V clamping voltage limits rail excursion below MCU absolute max rating; 100W surge rating handles ISO 7637-2 Pulse 5a. | Use Scenario: Protecting RS-485 transceiver inputs from human-body-model ESD events in building control panels. IC Role / Device Role / Timing Role: Low-capacitance shunt clamp on differential bus lines. Use Value: SOD-123W package minimizes parasitic capacitance; 2000Ω zener impedance preserves signal integrity above 1Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics BZT52-C56S | Same 56V nominal zener voltage, but SOD-323 package (smaller footprint, higher thermal resistance) | Lower power handling (500mW vs 1W); unsuitable for sustained regulation or high-energy surges | Select BZD27C56PW when 1W dissipation, 100W surge rating, or SOD-123W mechanical robustness is required |
| Vishay NZX56C | Through-hole DO-35 package; identical 56V zener spec but no 10/1000μs PRSM rating published | Lacks documented surge capability for automotive transients; requires manual lead forming and wave soldering | Select BZD27C56PW for automated SMT production, AEC-Q200-aligned designs, or space-constrained layouts |
Compared with BZT52-C56S and NZX56C, the BZD27C56PW offers superior surge immunity (100W PRSM), higher continuous power (1W), and SMT-ready SOD-123W packaging - making it optimal for automotive and industrial power rails where reliability and manufacturability are critical.
Availability
BZD27C56PW is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, automotive load dump protection, and ESD-sensitive communication ports requiring stable component supply and full traceability.
Supply support for BZD27C56PW 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, automotive, and consumer markets.
The BZD27C series is part of TSC's high-reliability Zener diode product line, engineered specifically for precision voltage regulation and transient suppression in harsh-environment power systems.
FAQ
What is the exact zener voltage range for BZD27C56PW at 10mA test current?
The BZD27C56PW has a guaranteed zener voltage range of 53.2V (minimum) to 58.8V (maximum) when tested at 10mA, per Taiwan Semiconductor's official datasheet revision D2203. This ±5% tolerance reflects the nominal 56V rating and is measured under standard 25°C ambient conditions. The BZD27C56PW maintains this specification across its qualified operating temperature range.
Does BZD27C56PW support automotive-grade transient suppression per ISO 7637-2?
Yes, the BZD27C56PW is rated for 100W non-repetitive peak pulse power under 10/1000μs waveform - matching the energy profile of ISO 7637-2 Pulse 5a (load dump). Its 78.6V clamping voltage and 175°C junction rating make it suitable for 12V automotive power rail protection. The BZD27C56PW is not AEC-Q200 certified, but its electrical and thermal specs align with common automotive design margins.
What is the thermal resistance from junction to ambient for BZD27C56PW?
The junction-to-ambient thermal resistance (RθJA) of the BZD27C56PW is 85°C/W when mounted on a standard 5mm × 5mm copper pad, as specified in the official Taiwan Semiconductor datasheet. This value assumes natural convection cooling and defines the temperature rise above ambient per watt of dissipated power. The BZD27C56PW also features RθJL = 22°C/W for improved heat transfer to PCB copper planes.
Can BZD27C56PW be used as a replacement for BZT52-C56 in existing designs?
No - the BZD27C56PW is not a direct replacement for BZT52-C56 due to differences in power rating (1W vs 500mW), package (SOD-123W vs SOD-123), and surge capability (100W PRSM vs no published rating). While both are 56V Zeners, the BZD27C56PW delivers higher robustness and thermal performance. Replacing BZT52-C56 with BZD27C56PW requires layout review and thermal validation, as the BZD27C56PW may alter board-level thermal behavior.
What marking code identifies BZD27C56PW on the device body?
The BZD27C56PW is marked with the code "Q5" on its SOD-123W package body, as confirmed in Taiwan Semiconductor's official datasheet revision D2203. This two-character marking appears adjacent to the cathode band and is used for visual identification and traceability. No date code or factory code is included in the primary marking for this part number; those fields are optional per customer request.
BZD27C56PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123W
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 56 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 43 V
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 200 mA
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123W
BZD27C56PW FAQ
1.How can I place an order for BZD27C56PW through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27C56PW 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 BZD27C56PW reliable?
The price and inventory of BZD27C56PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZD27C56PW is usually 5 days.
3.What payment methods are accepted for BZD27C56PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27C56PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27C56PW?
BZD27C56PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27C56PW 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 BZD27C56PW?
For technical support, including BZD27C56PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27C56PW requirements.
6.How does Aetrix verify that BZD27C56PW is sourced from the original manufacturer or authorized distributors?
All BZD27C56PW 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 BZD27C56PW meets industry standards.
7.What is the process for return or replacement of BZD27C56PW?
All BZD27C56PW units undergo pre-shipment inspection (PSI). If there is an issue with BZD27C56PW, 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 BZD27C56PW part is unused and in its original packaging.
Return procedure for BZD27C56PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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