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Taiwan Semiconductor Corporation BZD27C120PH
- Part No.:
- BZD27C120PH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZD27C120PH.pdf
- Description:
- DIODE ZENER 120.5V 1W SUB SMA
- Quantity:
- Payment:
- Shipping:
Inventory:4,351
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Product details
Overview
BZD27C120PH from Taiwan Semiconductor is a 1 W, 120 V Zener diode in Sub SMA package, AEC-Q101 qualified for automotive-grade reliability, with nominal Zener voltage 120.5 V at 5 mA test current, differential resistance 150 Ω, and maximum reverse leakage current 1 μA at 91 V, used for overvoltage clamping in DC/DC converters.
For engineers reviewing the BZD27C120PH datasheet, BZD27C120PH pinout, BZD27C120PH application, or BZD27C120PH equivalent, key selection criteria include Zener voltage tolerance (±5.5%), thermal resistance (RθJA = 88 °C/W), surge capability (100 W @ 10/1000 μs), and moisture sensitivity level (MSL 1).
Technical Context
The BZD27C120PH operates as a single-die, surface-mount Zener diode optimized for precision voltage regulation and transient suppression. It delivers stable 120.5 V clamping with temperature coefficient αZ = +0.09 %/°C and low leakage (≤1 μA @ 91 V), enabling reliable operation across –55 °C to +175 °C junction temperature range.
Its Sub SMA package supports high thermal performance (RθJL = 44 °C/W) and meets J-STD-020 MSL 1, while the matte tin-plated terminals ensure solderability per J-STD-002. The device is rated for non-repetitive peak pulse power of 100 W under 10/1000 μs waveform.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ @ IZT | 114–127 V (nominal 120.5 V at 5 mA; ±5.5% tolerance defines regulation window) |
| IZT | 5 mA (standard test current for Zener voltage measurement) |
| rdif | 150 Ω (dynamic impedance affecting regulation accuracy under load variation) |
| Ptot | 1 W (continuous power dissipation limit at TA = 25 °C on 5 mm × 5 mm Cu pad) |
| TJ max | +175 °C (maximum junction temperature enabling under-hood automotive use) |
| PRSM | 100 W (non-repetitive surge rating for 10/1000 μs transients in power supply protection) |
| αZ | +0.09 %/°C (positive tempco ensures predictable voltage drift over temperature) |
| MSL | Level 1 (no floor life limitation; safe for standard SMT reflow without baking) |
Pinout & Package
Package: Sub SMA - low-profile surface-mount case with cathode band polarity marking, UL 94V-0 molding compound, 0.019 g weight, and matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Zener conduction return path | Connected to lower-potential node during clamping; must handle 0.2 A forward surge |
| Cathode | Zener voltage reference / clamping output node | Marked by band; supplies regulated 120.5 V reference or sinks transient current to ground/rail |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics including engine control and body modules |
| Low leakage current | ≤1 μA at 91 V enables minimal standby power loss in always-on circuits |
| Stable Zener voltage | ±5.5% tolerance and +0.09 %/°C tempco support tight regulation over temperature |
| High surge robustness | 100 W 10/1000 μs pulse rating protects downstream ICs from ESD and load dump |
| MSL 1 packaging | Eliminates pre-bake requirement, reducing manufacturing cost and process complexity |
Applications
| Automotive On-Board DC/DC Converter | Industrial SMPS Overvoltage Clamp |
|---|---|
Use Scenario: Clamping transient spikes on 48 V intermediate bus in ADAS domain controllers. IC Role / Device Role / Timing Role: Zener diode providing fast-response voltage limiting at converter output rail. Use Value: Prevents >127 V excursions that could damage 100 V-rated MOSFETs and gate drivers. | Use Scenario: Protecting feedback divider network in isolated flyback power supply. IC Role / Device Role / Timing Role: Precision shunt regulator establishing stable reference point for optocoupler feedback loop. Use Value: Maintains ±1% output regulation despite input line surges up to 100 W (10/1000 μs). |
| LED Driver Voltage Reference | Telecom Power Interface Protection |
Use Scenario: Setting constant-current threshold in high-voltage LED string drivers. IC Role / Device Role / Timing Role: Zener reference stabilizing current-sense amplifier bias point. Use Value: Ensures <±2% current accuracy over –40 °C to +125 °C ambient due to low tempco. | Use Scenario: Surge suppression on 48 V PoE+ power feed lines in base station equipment. IC Role / Device Role / Timing Role: Primary clamping element absorbing lightning-induced transients. Use Value: Withstands repeated 100 W pulses without degradation, meeting IEC 61000-4-5 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120A | TVS diode (not Zener); 120 V standoff, 133 V breakdown, 600 W peak pulse power | Designed for fast transient suppression only; no precision regulation capability | Select when surge immunity dominates over voltage reference stability |
| BZX84-C120 | SOT-23 package; 120 V nominal, 500 mW rating, higher rdif (~200 Ω), MSL 1 | Lower power handling limits use to signal-level or low-current bias networks | Select when board space is constrained and 1 W dissipation is not required |
Compared with SMBJ120A and BZX84-C120, the BZD27C120PH uniquely combines AEC-Q101 qualification, 1 W continuous dissipation, and ±5.5% Zener tolerance-making it optimal for automotive and industrial power rail regulation where both precision and ruggedness are mandatory.
Availability
BZD27C120PH is available at Aetrix Electronics and suitable for automotive power management, industrial SMPS design, and telecom interface protection requiring stable component supply and long-term lifecycle continuity.
Supply support for BZD27C120PH 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.
The BZD27C series targets high-reliability voltage regulation and transient protection in harsh environments, with design emphasis on AEC-Q101 compliance, thermal robustness, and MSL 1 manufacturability for automotive power systems.
FAQ
What is the Zener voltage tolerance of BZD27C120PH?
The BZD27C120PH has a Zener voltage range of 114 V to 127 V at 5 mA test current, corresponding to a ±5.5% tolerance around the nominal 120.5 V value. This tolerance is specified in the Electrical Specifications table and reflects the device's precision for voltage reference and clamping applications.
Is BZD27C120PH suitable for automotive applications?
Yes, the BZD27C120PH is AEC-Q101 qualified and rated for junction temperatures from –55 °C to +175 °C, making it suitable for under-hood and powertrain-related automotive applications such as on-board DC/DC converters and battery management system protection circuits.
What is the maximum non-repetitive surge rating for BZD27C120PH?
The BZD27C120PH is rated for 100 W non-repetitive peak pulse power under a 10/1000 μs waveform, as specified for devices in the BZD27C110PH to BZD27C220PH group. This rating applies at TJ = 25 °C prior to surge and supports transient protection in power supply interfaces.
Does BZD27C120PH require moisture sensitivity baking before SMT assembly?
No, the BZD27C120PH is rated MSL 1 per J-STD-020, meaning it has unlimited floor life and does not require baking prior to reflow soldering. Its Sub SMA package is designed for direct placement into standard SMT processes without preconditioning.
What is the differential resistance of BZD27C120PH and why does it matter?
The BZD27C120PH has a typical differential resistance (rdif) of 150 Ω, measured at IZT = 5 mA. This parameter determines how tightly the Zener voltage remains regulated under varying load or current conditions-lower rdif yields better regulation stability, critical in precision reference and feedback applications.
BZD27C120PH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Voltage - Zener (Nom) (Vz):
- 120.5 V
- Tolerance:
- ±5.39%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 300 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 91 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Sub SMA
BZD27C120PH FAQ
1.How can I place an order for BZD27C120PH through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27C120PH 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 BZD27C120PH reliable?
The price and inventory of BZD27C120PH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZD27C120PH is usually 5 days.
3.What payment methods are accepted for BZD27C120PH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27C120PH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27C120PH?
BZD27C120PH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27C120PH 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 BZD27C120PH?
For technical support, including BZD27C120PH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27C120PH requirements.
6.How does Aetrix verify that BZD27C120PH is sourced from the original manufacturer or authorized distributors?
All BZD27C120PH 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 BZD27C120PH meets industry standards.
7.What is the process for return or replacement of BZD27C120PH?
All BZD27C120PH units undergo pre-shipment inspection (PSI). If there is an issue with BZD27C120PH, 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 BZD27C120PH part is unused and in its original packaging.
Return procedure for BZD27C120PH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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