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Taiwan Semiconductor Corporation BZD27C91PW
- Part No.:
- BZD27C91PW
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- SOD-123W
- Datasheet:
-
BZD27C91PW.pdf
- Description:
- DIODE ZENER 91V 1W SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:2,460
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Product details
Overview
BZD27C91PW from Taiwan Semiconductor is a 1 W, 91 V ±5% silicon Zener diode in SOD-123W package, rated for 5 mA test current, 126 V clamping voltage under 10/1000 µs surge, and 1.2 µA leakage at 73 V, used for precision voltage reference and overvoltage protection in power supply rails.
For engineers reviewing the BZD27C91PW datasheet, BZD27C91PW pinout, BZD27C91PW application, or BZD27C91PW equivalent, key selection factors include zener tolerance (±5%), low leakage (<1.2 µA), high surge capability (100 W PRSM), thermal resistance (RθJA = 85 °C/W), and RoHS/halogen-free compliance for industrial-grade reliability.
Technical Context
The BZD27C91PW operates as a single-die, unidirectional Zener diode with cathode-band polarity indication and optimized for stable reverse-bias regulation. Its 91 V nominal zener voltage is specified at 5 mA IZT, with dynamic impedance of 200 Ω and temperature coefficient of +0.09 to +0.13 %/°C.
It delivers 100 W non-repetitive peak pulse power (10/1000 µs) for transient suppression and maintains junction temperature within −55 °C to +175 °C. The SOD-123W package enables surface-mount assembly with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 86.5–95.6 V @ 5 mA - tight 5% tolerance ensures accurate reference in feedback loops |
| Power Dissipation Ptot | 1.0 W @ 25°C ambient - supports continuous regulation without forced cooling on 5 mm × 5 mm Cu pad |
| Clamping Voltage VC | 126 V @ 10/1000 µs waveform - defines maximum transient voltage seen by protected circuitry |
| Leakage Current IR | ≤1.2 µA @ 73 V - minimizes standby power loss in high-impedance bias networks |
| Zener Impedance ZZT | 200 Ω @ 5 mA - determines output voltage variation under load current changes |
| Junction Temp Range | −55 °C to +175 °C - enables operation in automotive under-hood and industrial motor drive environments |
| Thermal Resistance RθJA | 85 °C/W - quantifies self-heating rise above ambient; requires PCB copper area for thermal management |
Pinout & Package
SOD-123W low-profile surface-mount package with matte tin-plated leads, moisture sensitivity level 1 (J-STD-020), UL 94V-0 molding compound, and cathode band polarity marking. Weight: 0.016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to lower-potential node; forms reference return path in shunt regulator topology |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input rail; clamps voltage when reverse-biased beyond VZ; marked by band |
Key Features
| Feature | Design Value |
|---|---|
| Low leakage current | ≤1.2 µA @ 73 V enables use in battery-backed or ultra-low-power monitoring circuits |
| High surge robustness | 100 W peak pulse power (10/1000 µs) provides reliable transient immunity per IEC 61000-4-5 Level 3 |
| Stable temperature coefficient | +0.09 to +0.13 %/°C ensures predictable VZ drift across industrial temperature range |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive - suitable for green manufacturing and export compliance |
| JEDEC-standard SOD-123W | Compatible with standard pick-and-place equipment and reflow profiles (J-STD-020 MSL 1) |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Stabilizing optocoupler-based feedback voltage in isolated AC/DC adapters. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 91 V threshold for TL431-compatible error amplification. Use Value: Tight 5% VZ tolerance and low 200 Ω impedance maintain <±1% output regulation across line/load variations. |
Use Scenario: Generating stable excitation voltage for RTD or strain gauge bridges in PLC analog input modules. IC Role / Device Role / Timing Role: Precision voltage reference source replacing higher-cost IC references where 1% accuracy suffices. Use Value: ≤1.2 µA leakage avoids loading high-impedance bridge nodes; 175°C max junction temp supports extended field operation. |
| Overvoltage Protection Clamp | DC Bus Voltage Monitor |
Use Scenario: Protecting microcontroller GPIO pins from ESD and inductive kickback in motor driver boards. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping rail spikes to ≤126 V during 10/1000 µs surges. Use Value: 100 W PRSM rating handles repetitive transients without degradation; cathode-band marking prevents orientation errors. |
Use Scenario: Monitoring 100 V DC bus in solar charge controllers to trigger overvoltage shutdown. IC Role / Device Role / Timing Role: Threshold detector feeding comparator input via resistive divider scaled from 91 V reference. Use Value: Stable +0.09 to +0.13 %/°C TC ensures consistent trip point across −40°C to +85°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics BZT03-C91 | Same 91 V nominal, but 1.3 W Ptot, 400 Ω ZZT, SOD-57 package (larger footprint, higher RθJA) | Higher power margin but less board-space efficient; not drop-in due to different package and thermal profile | Select BZT03-C91 only if >1 W continuous dissipation is required and PCB layout accommodates SOD-57 |
| Vishay BZX84-C91 | Same 91 V nominal, 300 mW Ptot, 250 Ω ZZT, SOT-23 package (smaller, lower surge rating: 40 W PRSM) | Lower surge immunity and power handling; unsuitable for 100 W transient clamping scenarios | Choose BZX84-C91 only for space-constrained, low-energy signal-level referencing-not for power rail protection |
Compared with BZT03-C91 and BZX84-C91, the BZD27C91PW uniquely balances 1 W continuous power, 100 W surge capability, and SOD-123W compactness-making it optimal for industrial power supply reference and clamp functions where both precision and ruggedness are required.
Availability
BZD27C91PW is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, and overvoltage protection circuits requiring stable component supply, long-lifecycle availability, and traceable sourcing.
Supply support for BZD27C91PW 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 ESD protection components.
The BZD27 series was designed for high-reliability voltage regulation and transient suppression in industrial, automotive, and consumer power systems-emphasizing tight tolerance, low leakage, and robust surge performance.
FAQ
What is the zener voltage tolerance of BZD27C91PW?
The BZD27C91PW has a zener voltage range of 86.5 V to 95.6 V at 5 mA test current, corresponding to a ±5% tolerance around the nominal 91 V rating. This is confirmed in the Electrical Specifications table (Version D2203, Page 3) and ensures predictable regulation in feedback and reference applications.
Does BZD27C91PW support high-surge applications?
Yes, the BZD27C91PW supports high-surge applications with a non-repetitive peak pulse power dissipation (PRSM) of 100 W for 10/1000 µs waveforms, as specified for the BZD27C110PW–BZD27C220PW subgroup. This makes it suitable for IEC 61000-4-5 Level 3 transient suppression in industrial power rails.
What is the maximum junction temperature for BZD27C91PW?
The BZD27C91PW has a maximum junction temperature (TJMAX) of +175 °C and a minimum of −55 °C, enabling operation in harsh thermal environments such as motor drives and under-hood automotive systems. Derating begins above 25 °C ambient per the steady-state power derating curve.
Is BZD27C91PW halogen-free and RoHS compliant?
Yes, the BZD27C91PW is halogen-free per IEC 61249-2-21 and RoHS compliant, as explicitly stated in the FEATURES section (Version D2203, Page 1). These certifications are verified through material declarations and apply to the full BZD27C11PW–BZD27C220PW family.
What package type does BZD27C91PW use and what are its mounting requirements?
The BZD27C91PW uses the SOD-123W surface-mount package with matte tin-plated leads solderable per J-STD-002. Recommended pad layout and thermal relief are provided in the PACKAGE OUTLINE DIMENSIONS section (Version D2203, Page 6); mounting requires a 5 mm × 5 mm Cu pad for full 1.0 W power dissipation at 25 °C ambient.
BZD27C91PW 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):
- 91 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 68 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
BZD27C91PW FAQ
1.How can I place an order for BZD27C91PW through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27C91PW 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 BZD27C91PW reliable?
The price and inventory of BZD27C91PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZD27C91PW is usually 5 days.
3.What payment methods are accepted for BZD27C91PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27C91PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27C91PW?
BZD27C91PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27C91PW 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 BZD27C91PW?
For technical support, including BZD27C91PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27C91PW requirements.
6.How does Aetrix verify that BZD27C91PW is sourced from the original manufacturer or authorized distributors?
All BZD27C91PW 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 BZD27C91PW meets industry standards.
7.What is the process for return or replacement of BZD27C91PW?
All BZD27C91PW units undergo pre-shipment inspection (PSI). If there is an issue with BZD27C91PW, 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 BZD27C91PW part is unused and in its original packaging.
Return procedure for BZD27C91PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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