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Taiwan Semiconductor Corporation BZD27C56PWH
- Part No.:
- BZD27C56PWH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- SOD-123W
- Datasheet:
-
BZD27C56PWH.pdf
- Description:
- DIODE ZENER 56V 1W SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:9,237
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Product details
Overview
BZD27C56PWH from Taiwan Semiconductor is a 1 W, 56 V ±5% tolerance AEC-Q101 qualified Zener diode in SOD-123W package, delivering stable voltage regulation at 10 mA test current with 60 Ω dynamic impedance and 78.6 V clamping voltage under 10/1000 µs surge, used in automotive ECU reference and overvoltage protection circuits.
For engineers reviewing the BZD27C56PWH datasheet, BZD27C56PWH pinout, BZD27C56PWH application, or BZD27C56PWH equivalent, key selection factors include its 53.2–58.8 V zener voltage range, 1.9 µA leakage at 43 V, +0.09%/°C temperature coefficient, and 300 W non-repetitive peak pulse power rating for transient suppression.
Technical Context
The BZD27C56PWH operates as a single-die silicon Zener diode optimized for precision voltage reference and transient voltage suppression in automotive-grade systems. It features low-profile SOD-123W packaging with matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
Its thermal design supports junction temperatures from –55°C to +175°C, with RθJA = 85°C/W and RθJL = 22°C/W enabling reliable operation under high ambient conditions. The device meets moisture sensitivity level 1 per J-STD-020 and is RoHS-compliant and halogen-free per IEC 61249-2-21.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 53.2–58.8 V at IZT = 10 mA - defines regulated output voltage window under nominal bias |
| Dynamic Impedance (ZZT) | 60 Ω max at IZT = 10 mA - determines voltage deviation under load current variation |
| Clamping Voltage (VC) | 78.6 V at IRSM (10/1000 µs) - specifies maximum voltage during transient surge events |
| Leakage Current (IR) | 1.9 µA max at VR = 43 V - ensures minimal standby power loss in high-impedance reference paths |
| Power Dissipation (Ptot) | 1.0 W at TA = 25°C on 5 mm × 5 mm Cu pad - sets continuous DC power handling limit |
| Temperature Coefficient (αVZ) | +0.09 to +0.13 %/°C - quantifies zener voltage drift across operating temperature range |
Pinout & Package
Package: SOD-123W - low-profile surface-mount case with cathode band polarity marking, UL 94V-0 molding compound, and 0.016 g mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; reference ground node in reverse-biased regulation | Connected to lower-potential side of circuit; enables bidirectional ESD path when paired with cathode |
| Cathode | Current exit terminal in forward bias; regulated output node in reverse-biased Zener mode | Connected to higher-potential rail; provides stable 56 V reference or clamps transients above 78.6 V |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS subsystems |
| Low leakage current | 1.9 µA max at 43 V enables high-impedance voltage references without signal degradation |
| High surge robustness | 300 W non-repetitive peak pulse power (100 µs) supports ISO 7637-2 transient immunity |
| Stable temperature coefficient | +0.09%/°C minimizes reference drift in under-hood environments up to +125°C ambient |
| Moisture sensitivity level 1 | Enables standard SMT assembly without baking or dry-pack requirements |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Power Supply Reference |
|---|---|
Use Scenario: Stabilizing microcontroller ADC reference voltage in diesel injection timing circuits exposed to load dump transients. IC Role / Device Role / Timing Role: Zener diode providing precise 56 V reference for analog front-end scaling and overvoltage detection. Use Value: Maintains <±1% reference accuracy across –40°C to +125°C while surviving 12 V system load dump surges. |
Use Scenario: Setting feedback threshold in isolated flyback converter secondary-side regulation loop. IC Role / Device Role / Timing Role: Voltage clamp and reference element in TL431-based optocoupler feedback network. Use Value: Enables tight output voltage tolerance (±2%) and fast transient response due to 60 Ω ZZT and low capacitance. |
| Telecom Line Card Protection | Medical Diagnostic Sensor Biasing |
Use Scenario: Protecting Ethernet PHY interface ICs from induced lightning surges on PoE-powered line cards. IC Role / Device Role / Timing Role: Primary clamping device shunting energy before TVS diodes engage. Use Value: Limits voltage to 78.6 V during 10/1000 µs transients, preventing latch-up in 3.3 V/5 V PHYs. |
Use Scenario: Providing stable bias voltage for piezoresistive pressure sensor bridges in portable ultrasound probes. IC Role / Device Role / Timing Role: Low-noise voltage reference source decoupled from noisy digital supply rails. Use Value: Delivers <1.9 µA leakage and <0.13%/°C drift to ensure sub-0.5% full-scale measurement error over clinical temperature 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 BZT52C56S | Same SOD-123 package but 500 mW rating; 53–59 V VZ, 100 Ω ZZT, 80 V VC | Limited to lower-power reference use; insufficient for 300 W surge handling | Select BZD27C56PWH where automotive-grade surge immunity or >1 W continuous dissipation is required |
| Vishay PLZ56B | SOD-123W package; 53.2–58.8 V VZ, 60 Ω ZZT, but only 100 W PZSM (100 µs) | Lower transient robustness; not AEC-Q101 qualified | Choose BZD27C56PWH for ISO 16750-2 compliance or extended temperature reliability beyond 150°C |
Compared with BZT52C56S and PLZ56B, the BZD27C56PWH uniquely combines AEC-Q101 qualification, 300 W surge capability, and 1 W steady-state power in a single SOD-123W footprint-enabling drop-in replacement only where those specific ratings are mandatory.
Availability
BZD27C56PWH is available at Aetrix Electronics and suitable for automotive ECU design, industrial power supply reference, and telecom surge protection requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZD27C56PWH 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 automotive-qualified components since 1979.
The BZD27C series is part of TSC's AEC-Q101-certified Zener diode portfolio designed specifically for voltage regulation, reference, and transient protection in harsh-environment automotive and industrial systems.
FAQ
What is the zener voltage tolerance of BZD27C56PWH?
The BZD27C56PWH has a nominal zener voltage of 56 V with a tolerance of ±5%, corresponding to a guaranteed range of 53.2 V to 58.8 V at 10 mA test current (IZT). This tolerance is specified in the Electrical Specifications table of the official Taiwan Semiconductor datasheet Version B2203, page 3.
Is BZD27C56PWH suitable for automotive applications?
Yes, the BZD27C56PWH is AEC-Q101 qualified and rated for junction temperatures from –55°C to +175°C, making it suitable for under-hood automotive applications including engine control units, body control modules, and ADAS power domains where reliability under thermal and electrical stress is critical.
What is the clamping voltage of BZD27C56PWH under surge conditions?
The BZD27C56PWH exhibits a clamping voltage (VC) of 78.6 V under a 10/1000 µs waveform at rated surge current, as confirmed in the Electrical Specifications table (page 4, Version B2203). This value defines the maximum voltage seen by downstream circuitry during standardized transient events.
Does BZD27C56PWH have moisture sensitivity level (MSL) restrictions?
No, the BZD27C56PWH is rated MSL Level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions and processed using standard reflow profiles without pre-baking or dry-pack requirements-reducing manufacturing complexity and cost.
What is the thermal resistance from junction to ambient for BZD27C56PWH?
The junction-to-ambient thermal resistance (RθJA) of BZD27C56PWH is 85°C/W when mounted on a 5 mm × 5 mm copper pad, as specified in the Thermal Performance section (page 2, Version B2203). This value assumes standard JEDEC test conditions and guides heatsinking decisions for continuous 1 W operation.
BZD27C56PWH 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123W
BZD27C56PWH FAQ
1.How can I place an order for BZD27C56PWH through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27C56PWH 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 BZD27C56PWH reliable?
The price and inventory of BZD27C56PWH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZD27C56PWH is usually 5 days.
3.What payment methods are accepted for BZD27C56PWH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27C56PWH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27C56PWH?
BZD27C56PWH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27C56PWH 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 BZD27C56PWH?
For technical support, including BZD27C56PWH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27C56PWH requirements.
6.How does Aetrix verify that BZD27C56PWH is sourced from the original manufacturer or authorized distributors?
All BZD27C56PWH 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 BZD27C56PWH meets industry standards.
7.What is the process for return or replacement of BZD27C56PWH?
All BZD27C56PWH units undergo pre-shipment inspection (PSI). If there is an issue with BZD27C56PWH, 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 BZD27C56PWH part is unused and in its original packaging.
Return procedure for BZD27C56PWH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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