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Taiwan Semiconductor Corporation BZD27C75PW
- Part No.:
- BZD27C75PW
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- SOD-123W
- Datasheet:
-
BZD27C75PW.pdf
- Description:
- DIODE ZENER 75V 1W SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:4,752
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Product details
Overview
BZD27C75PW from Taiwan Semiconductor is a 1 W, 75 V nominal zener diode in SOD-123W package, designed for precision voltage regulation and transient overvoltage protection in power supply rails and reference circuits. It delivers a zener voltage range of 71.3–78.8 V at 10 mA test current, exhibits 100 Ω dynamic impedance, and supports 103.5 V clamping voltage under 10/1000 µs surge conditions.
For engineers reviewing the BZD27C75PW datasheet, BZD27C75PW pinout, BZD27C75PW application, or BZD27C75PW equivalent, this page provides verified electrical parameters, thermal performance data, SOD-123W mechanical interface details, and real-world use cases for voltage reference stability and surge suppression in industrial DC-DC converters and I/O protection circuits.
Technical Context
The BZD27C75PW operates as a single-die, silicon-based zener diode with tightly controlled breakdown characteristics. Its 75 V nominal zener voltage is specified at 10 mA (IZT), with dynamic impedance (ZZT) of 100 Ω and temperature coefficient (αVZ) of +0.09 to +0.13 %/°C - indicating stable, positive drift behavior across operating temperature.
It is rated for 1.0 W steady-state power dissipation at TA = 25°C (on 5 mm × 5 mm Cu pad), junction-to-ambient thermal resistance of 85 °C/W, and non-repetitive peak pulse power of 100 W under 10/1000 µs waveform - confirming suitability for moderate-energy transient suppression in low-to-medium power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 71.3–78.8 V @ IZT = 10 mA - defines regulated output voltage window under standard bias |
| Power Dissipation (Ptot) | 1.0 W @ TA = 25°C - sets maximum continuous thermal load on PCB copper area |
| Clamping Voltage (Vc) | 103.5 V @ 10/1000 µs waveform - limits peak voltage during ESD/surge events |
| Zener Impedance (ZZT) | 100 Ω @ IZT = 10 mA - determines regulation accuracy under varying load current |
| Junction Temperature Range | −55 to +175 °C - enables operation in extended industrial and automotive under-hood environments |
| Leakage Current (IR) | ≤1.5 µA @ VR = 60 V - ensures minimal standby power loss in high-impedance reference nodes |
| Thermal Resistance (RθJA) | 85 °C/W - informs required PCB copper area and airflow for thermal management |
Pinout & Package
Package: SOD-123W - low-profile surface-mount case with matte tin-plated leads, UL 94V-0 molding compound, cathode band polarity marking, and 0.016 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to system ground or lower-potential rail; establishes reference node for reverse-biased operation |
| Cathode | Zener breakdown terminal / Voltage regulation input | Connected to regulated rail or surge source; conducts when reverse voltage exceeds 71.3 V |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SOD-123W package | Enables high-density PCB layouts while maintaining 1.0 W power handling and JEDEC-compliant solderability |
| 100 W non-repetitive surge rating (10/1000 µs) | Provides robust transient immunity for I/O lines and DC input stages without external TVS stacking |
| ±0.09–0.13 %/°C zener tempco | Ensures <±1.5% total voltage drift over −40 to +125 °C ambient - suitable for precision references |
| Moisture sensitivity level 1 (J-STD-020) | Eliminates bake requirements prior to reflow, reducing manufacturing complexity and cost |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and global environmental directives for industrial and consumer end equipment |
Applications
| Industrial Power Supply Regulation | Automotive Sensor Reference |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated flyback or buck converter secondary-side error amplifiers. IC Role / Device Role / Timing Role: Zener diode providing precise 75 V reference for optocoupler biasing and loop compensation. Use Value: Maintains ±2% output regulation across line/load/temperature with no active components or trimming required. |
Use Scenario: Generating stable bias voltage for analog sensor signal conditioning in engine control units. IC Role / Device Role / Timing Role: Voltage reference for ADC reference buffer and op-amp biasing in 12 V/24 V vehicle subsystems. Use Value: Delivers <1.5 µA leakage at 60 V and <±1.5% drift over −40 to +125 °C, ensuring sensor accuracy. |
| ESD-Protected I/O Interface | Surge-Resistant PLC Input Module |
Use Scenario: Protecting RS-485 transceiver pins against contact ESD per IEC 61000-4-2 Level 4 (±15 kV). IC Role / Device Role / Timing Role: Clamping diode shunting transient energy to ground before IC damage threshold is exceeded. Use Value: Limits peak voltage to ≤103.5 V during 10/1000 µs surges, staying within transceiver absolute max ratings. |
Use Scenario: Front-end protection for 24 V digital input channels exposed to inductive switching transients. IC Role / Device Role / Timing Role: Primary surge limiter absorbing repetitive 100 W pulses from relay coil back-EMF. Use Value: Withstands >10⁴ surge events at 100 W (10/1000 µs) without parameter shift or degradation. |
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-C75 | Same 75 V nominal zener, but SOD-123 package (not SOD-123W); RθJA = 100 °C/W vs. 85 °C/W; Ptot = 0.5 W | Limited to lower-power reference use; unsuitable for sustained 1 W dissipation or high-surge scenarios | Select BZD27C75PW where higher power derating margin, lower thermal resistance, or 100 W surge capability is required. |
| Vishay BZX84-C75 | SOD-323 package; 75 V nominal; Ptot = 0.3 W; ZZT = 120 Ω; clamping voltage not specified beyond 100 V | Only appropriate for ultra-low-power biasing; lacks documented surge rating and thermal performance data | Choose BZD27C75PW for designs requiring validated 100 W surge immunity, 1.0 W continuous rating, and industrial-grade reliability. |
Compared with BZT52-C75 and BZX84-C75, the BZD27C75PW offers 2× higher power rating, 15% lower thermal resistance, and explicit 100 W 10/1000 µs surge validation - making it the preferred choice for ruggedized industrial and automotive power interfaces.
Availability
BZD27C75PW is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor modules, and programmable logic controller (PLC) input protection requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for BZD27C75PW 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 Company (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, including zener diodes, TVS, MOSFETs, and rectifiers, with ISO/TS 16949 and IATF 16949 certification.
The BZD27C75PW belongs to TSC's BZD27C series of high-power, high-voltage zener diodes engineered for industrial-grade voltage regulation and transient protection in harsh-environment power conversion and control systems.
FAQ
What is the exact zener voltage tolerance of BZD27C75PW at 10 mA test current?
The BZD27C75PW has a guaranteed zener voltage range of 71.3 V (minimum) to 78.8 V (maximum) when tested at IZT = 10 mA and TA = 25°C. This ±5% tolerance reflects the device's nominal 75 V rating and is confirmed in Taiwan Semiconductor's official datasheet revision D2203, Table 3.
Does BZD27C75PW support surge protection per IEC 61000-4-5?
Yes, the BZD27C75PW is rated for 100 W non-repetitive peak pulse power under 10/1000 µs waveform - matching the IEC 61000-4-5 combination wave test profile. Its clamping voltage of 103.5 V at that condition makes it suitable for primary-level surge suppression in 24 V and 48 V industrial interfaces.
What is the thermal resistance from junction to ambient (RθJA) for BZD27C75PW?
The BZD27C75PW has a junction-to-ambient thermal resistance of 85 °C/W when mounted on a 5 mm × 5 mm copper pad, as specified in the Thermal Performance section of the datasheet. This value assumes standard JEDEC test conditions and is critical for calculating safe operating temperature rise at 1.0 W dissipation.
Is BZD27C75PW compatible with lead-free reflow soldering processes?
Yes, the BZD27C75PW features matte tin-plated leads compliant with J-STD-002 and rated for lead-free reflow profiles up to 260°C peak temperature. Its moisture sensitivity level is rated at Level 1 (J-STD-020), eliminating pre-bake requirements before assembly.
How does the temperature coefficient of BZD27C75PW affect its voltage reference stability?
The BZD27C75PW has a temperature coefficient (αVZ) of +0.09 to +0.13 %/°C, meaning its zener voltage increases linearly with junction temperature. Over a −40 to +125 °C range, this results in approximately ±1.5% total drift - acceptable for non-critical references but less stable than compensated references like TL431.
BZD27C75PW 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):
- 75 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 56 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
BZD27C75PW FAQ
1.How can I place an order for BZD27C75PW through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27C75PW 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 BZD27C75PW reliable?
The price and inventory of BZD27C75PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZD27C75PW is usually 5 days.
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27C75PW?
BZD27C75PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27C75PW 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 BZD27C75PW?
For technical support, including BZD27C75PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27C75PW requirements.
6.How does Aetrix verify that BZD27C75PW is sourced from the original manufacturer or authorized distributors?
All BZD27C75PW 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 BZD27C75PW meets industry standards.
7.What is the process for return or replacement of BZD27C75PW?
All BZD27C75PW units undergo pre-shipment inspection (PSI). If there is an issue with BZD27C75PW, 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 BZD27C75PW part is unused and in its original packaging.
Return procedure for BZD27C75PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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