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Taiwan Semiconductor Corporation BZD27C43PW
- Part No.:
- BZD27C43PW
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- SOD-123W
- Datasheet:
-
BZD27C43PW.pdf
- Description:
- DIODE ZENER 43V 1W SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:6,056
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Product details
Overview
BZD27C43PW from Taiwan Semiconductor is a 1 W, 43 V ±5% silicon Zener diode in SOD-123W package, designed for precision voltage regulation and transient overvoltage protection in power supply rails and reference circuits. It delivers 40.9–45.2 V zener voltage at 10 mA test current, 60.7 V clamping voltage under 10/1000 µs surge, and exhibits low leakage (≤2.5 µA at 33 V) with ±0.08–0.13 %/°C temperature coefficient.
For engineers reviewing the BZD27C43PW datasheet, BZD27C43PW pinout, BZD27C43PW application, or BZD27C43PW equivalent, key selection criteria include zener voltage tolerance, dynamic impedance (45 Ω max), surge capability (100 W PRSM), thermal resistance (RθJA = 85 °C/W), and RoHS/halogen-free compliance for industrial and automotive-grade designs.
Technical Context
The BZD27C43PW operates as a single-die, unidirectional Zener diode optimized for stable DC voltage reference and bidirectional transient suppression. Its SOD-123W package enables high power density (1.0 W at 25°C, derated to 2.3 W at 80°C lead temperature) and supports surge handling up to 100 W (10/1000 µs) for systems exposed to ESD or load dump events.
It features low leakage current (≤2.5 µA at VR = 33 V), tight zener voltage tolerance (±5% nominal), and predictable temperature drift (αVZ = +0.08 to +0.13 %/°C), enabling reliable performance across –55°C to +175°C junction temperature range without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener voltage VZ | 40.9–45.2 V @ IZT = 10 mA - defines regulated output voltage window under standard bias |
| Power dissipation Ptot | 1.0 W @ TA = 25°C - sets continuous thermal limit on PCB with 5 mm × 5 mm Cu pad |
| Clamping voltage VC | 60.7 V @ 10/1000 µs waveform - determines maximum transient voltage seen by protected circuit |
| Zener impedance ZZT | 45 Ω max @ IZT = 10 mA - impacts regulation accuracy under varying load current |
| Junction temperature TJ | –55°C to +175°C - enables operation in under-hood automotive or industrial motor drive environments |
| Leakage current IR | ≤2.5 µA @ VR = 33 V - ensures minimal standby power loss in battery-backed systems |
Pinout & Package
SOD-123W surface-mount package: low-profile (max height 1.1 mm), matte tin-plated leads, cathode indicated by band, moisture sensitivity level 1 per J-STD-020, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connects to lower-potential node during forward bias; used for polarity identification in reverse-biased Zener operation |
| Cathode | Zener breakdown terminal | Connected to higher-potential rail; voltage regulation occurs between cathode and anode when reverse biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SOD-123W package | Enables high-density PCB layouts while maintaining 1.0 W power rating and JEDEC-compliant solderability |
| 100 W non-repetitive peak pulse rating | Provides robust protection against 10/1000 µs transients in automotive load-dump or inductive switching scenarios |
| ±5% zener voltage tolerance | Ensures predictable regulation without post-manufacturing trimming in cost-sensitive consumer and industrial supplies |
| RoHS and halogen-free compliance | Meets IEC 61249-2-21 and global environmental directives for green electronics manufacturing |
Applications
| Industrial Power Supply Regulation | Automotive Load-Dump Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converters for PLC I/O modules. IC Role / Device Role / Timing Role: Zener diode providing precise 43 V reference to optocoupler input in secondary-side regulation loop. Use Value: Tight 40.9–45.2 V tolerance and low 45 Ω impedance maintain ±1% output voltage accuracy across line/load variations. | Use Scenario: Clamping induced surges on 12 V battery-fed control units during alternator load dump. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing 100 W (10/1000 µs) energy to protect downstream MCU and CAN transceivers. Use Value: 60.7 V clamping voltage limits stress on 3.3 V/5 V logic rails while surviving repeated 12 V system transients. |
| Test Equipment Reference Voltage | LED Driver Overvoltage Clamp |
Use Scenario: Generating stable reference for digital multimeter ADC calibration circuitry. IC Role / Device Role / Timing Role: Precision Zener establishing 43 V reference point for DAC-based voltage scaling and offset correction. Use Value: Low 2.5 µA leakage and +0.08–0.13 %/°C TC ensure <0.5% drift over 0–70°C operating range. | Use Scenario: Preventing overvoltage damage to constant-current LED drivers during open-circuit fault conditions. IC Role / Device Role / Timing Role: Shunt regulator clamping driver output to 43 V when string disconnects or fails open. Use Value: 1.0 W continuous dissipation handles sustained fault currents without thermal runaway in enclosed luminaires. |
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-C43S | Same 43 V nominal VZ, but SOD-323 package (smaller footprint, lower Ptot = 0.5 W) | Limited to lower-power signal-level clamping; unsuitable for 1 W continuous regulation | Select BZD27C43PW when ≥1 W dissipation or 100 W surge capability is required |
| Vishay PLZ43 | 43 V VZ, SOD-123 package (not SOD-123W), Ptot = 1.0 W, but PRSM = 40 W (10/1000 µs) | Lower surge immunity; not rated for automotive load-dump per ISO 7637-2 | Choose BZD27C43PW where 100 W transient handling and AEC-Q200-aligned reliability are mandatory |
Compared with BZT52-C43S and PLZ43, the BZD27C43PW uniquely combines 1 W continuous power, 100 W surge rating, and SOD-123W mechanical robustness-making it optimal for industrial power rails and automotive body electronics requiring long-term stability and high-energy transient resilience.
Availability
BZD27C43PW is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive load-dump protection, test equipment reference voltage generation, and LED driver overvoltage clamping requiring stable component supply and full traceability.
Supply support for BZD27C43PW 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 with global distribution and AEC-Q200-qualified product lines.
The BZD27C series was engineered for high-reliability voltage regulation and transient suppression in harsh-environment applications-including automotive subsystems, industrial automation, and telecom infrastructure-where thermal stability and surge resilience are critical.
FAQ
What is the zener voltage tolerance of BZD27C43PW?
The BZD27C43PW has a zener voltage range of 40.9 V to 45.2 V at 10 mA test current, corresponding to a ±5% tolerance around the nominal 43 V rating. This tolerance is guaranteed per Taiwan Semiconductor's D2203 specification sheet and applies under standard test conditions (TA = 25°C). The BZD27C43PW maintains this specification across its qualified operating temperature range without binning or sorting.
Does BZD27C43PW support automotive-grade surge requirements?
Yes, the BZD27C43PW is rated for 100 W non-repetitive peak pulse power (PRSM) under 10/1000 µs waveform-meeting common automotive load-dump immunity requirements per ISO 7637-2. Its SOD-123W package, 175°C max junction temperature, and JESD201 Class 2 whisker resistance further align with AEC-Q200 stress test profiles. The BZD27C43PW is widely deployed in body control modules and infotainment power rails.
What is the maximum clamping voltage of BZD27C43PW during surge events?
The BZD27C43PW exhibits a maximum clamping voltage (VC) of 60.7 V under 10/1000 µs transient waveform at rated surge current. This value is measured per Taiwan Semiconductor's D2203 datasheet and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The BZD27C43PW achieves this while maintaining 100 W peak power handling and thermal stability up to 175°C junction temperature.
Can BZD27C43PW be used in place of older BZD27C43 models?
Yes, the BZD27C43PW replaces legacy BZD27C43 variants with identical electrical specifications and enhanced packaging: SOD-123W offers improved thermal performance (RθJA = 85 °C/W vs. ~100 °C/W for standard SOD-123) and moisture resistance (MSL Level 1). The BZD27C43PW retains the same marking code Q0, pinout, and footprint-enabling drop-in replacement without layout changes in existing designs.
What is the leakage current specification for BZD27C43PW at 33 V reverse bias?
The BZD27C43PW specifies a maximum leakage current (IR) of 2.5 µA when reverse biased at 33 V (77% of nominal VZ). This value is verified per Taiwan Semiconductor's D2203 datasheet and reflects low standby power consumption critical for battery-powered instrumentation and always-on monitoring circuits. The BZD27C43PW maintains this leakage performance across its full operating temperature range (–55°C to +175°C).
BZD27C43PW 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):
- 43 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 45 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 33 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
BZD27C43PW FAQ
1.How can I place an order for BZD27C43PW through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27C43PW 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 BZD27C43PW reliable?
The price and inventory of BZD27C43PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZD27C43PW is usually 5 days.
3.What payment methods are accepted for BZD27C43PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27C43PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27C43PW?
BZD27C43PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27C43PW 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 BZD27C43PW?
For technical support, including BZD27C43PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27C43PW requirements.
6.How does Aetrix verify that BZD27C43PW is sourced from the original manufacturer or authorized distributors?
All BZD27C43PW 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 BZD27C43PW meets industry standards.
7.What is the process for return or replacement of BZD27C43PW?
All BZD27C43PW units undergo pre-shipment inspection (PSI). If there is an issue with BZD27C43PW, 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 BZD27C43PW part is unused and in its original packaging.
Return procedure for BZD27C43PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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