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Nexperia USA Inc. BZT52H-B27,115
- Part No.:
- BZT52H-B27,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-B27,115.pdf
- Description:
- DIODE ZENER 27V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:53,277
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Product details
Overview
BZT52H-B27,115 from Nexperia is a ±2 % tolerance Zener diode in SOD123F package, rated for 27 V nominal breakdown voltage at IZ = 2 mA, with 830 mW total power dissipation and 250 mA maximum forward current. It serves as a precision voltage reference or shunt regulator in low-power analog circuits, power supply feedback paths, and overvoltage protection stages.
For engineers reviewing the BZT52H-B27,115 datasheet, BZT52H-B27,115 pinout, BZT52H-B27,115 application, or BZT52H-B27,115 equivalent, key selection criteria include Zener voltage tolerance (±2 %), differential resistance (250 Ω max), temperature coefficient (+0.05 mV/K), thermal resistance (150 K/W junction-to-solder-point), and SOD123F footprint compatibility with automated SMT assembly.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable voltage across its terminals under varying load or input conditions. Its 27 V nominal Zener voltage is specified at 2 mA test current, with differential resistance ≤250 Ω ensuring minimal voltage shift under current variation.
The device exhibits a near-zero temperature coefficient of +0.05 mV/K at IZ = 2 mA, enabling stable regulation across industrial temperature ranges (−65 °C to +150 °C). Thermal performance is defined by Rth(j-sp) = 150 K/W when mounted on FR4 PCB with 1 cm² cathode pad, supporting reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 26.5 V to 27.5 V at IZ = 2 mA - defines precise clamping threshold for voltage regulation |
| Tolerance | ±2 % - ensures tight voltage matching across production lots without binning |
| Differential Resistance (rdif) | ≤250 Ω - limits output voltage deviation under dynamic load changes |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 board |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - enables low-loss forward conduction during transient polarity events |
| Reverse Current (IR) | ≤40 μA at VR = 21.6 V - guarantees low leakage below breakdown, critical for standby power integrity |
| Non-repetitive Peak Reverse Current (IZSM) | 1.0 A for tp = 100 μs - supports surge suppression in short-duration overvoltage transients |
Pinout & Package
SOD123F surface-mount plastic package: 2-terminal, flat lead, small outline (3.6 mm × 1.7 mm × 1.0 mm), cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction with cathode during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Three-tolerance series | ±1 %, ±2 %, and ≈±5 % options enable cost-performance trade-off without redesigning layout |
| Low thermal resistance | Rth(j-sp) = 150 K/W allows sustained 830 mW dissipation with minimal junction temperature rise on standard FR4 |
| Stable temperature coefficient | +0.05 mV/K at 27 V minimizes drift over −65 °C to +150 °C ambient, critical for industrial sensor references |
| High surge capability | 1.0 A non-repetitive peak reverse current supports IEC 61000-4-5 level 3 surge immunity in power supply inputs |
| SMD-compatible footprint | SOD123F outline matches IPC-7351B standard, enabling seamless integration into high-density PCB assemblies |
Applications
| Power Supply Feedback Loop | Overvoltage Clamp |
|---|---|
|
Use Scenario: Stabilizing output voltage in isolated flyback or buck-derived DC-DC converters via optocoupler-coupled feedback network. IC Role / Device Role / Timing Role: Zener diode provides precise 27 V reference to drive optocoupler LED, closing regulation loop independent of primary-side controller timing. Use Value: ±2 % tolerance ensures output voltage accuracy within ±1.5 % over line/load/temperature, meeting Class II medical and industrial PSU standards. |
Use Scenario: Protecting microcontroller I/O pins or ADC inputs from ESD or transient overvoltage exceeding 27 V. IC Role / Device Role / Timing Role: Shunt clamp activated only above 27 V, diverting excess current away from sensitive downstream circuitry. Use Value: 1.0 A surge rating absorbs 100 μs transients per IEC 61000-4-2 Level 4, preserving signal integrity without adding TVS delay. |
| Voltage Reference for Analog Circuits | Current Source Biasing |
|
Use Scenario: Generating stable bias voltage for op-amp comparators, DAC references, or sensor excitation in battery-powered instrumentation. IC Role / Device Role / Timing Role: Provides low-drift 27 V reference point for precision resistor-divider networks feeding analog front-end stages. Use Value: +0.05 mV/K TC and ≤250 Ω rdif limit reference error to <0.1 % over 0–70 °C, eliminating need for active compensation. |
Use Scenario: Setting constant current through LEDs or laser diodes using a series resistor and Zener-regulated voltage drop. IC Role / Device Role / Timing Role: Maintains fixed 27 V across current-setting resistor, enabling predictable ILED = (VZ − Vf) / Rset. Use Value: 830 mW Ptot supports ≥30 mA continuous current with 1 kΩ resistor, suitable for indicator and status lighting applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52C27,115 | ±5 % tolerance, higher differential resistance (≤300 Ω), same SOD123F package | Accepts wider output voltage variation; suited for non-critical biasing where cost is prioritized over precision | Select when ±5 % regulation accuracy suffices and BOM cost reduction is required |
| MMSZ5256ET1G | ±5 % tolerance, SOD-123 package (identical mechanical outline), 27 V nominal, 500 mW Ptot | Lower power rating restricts use to sub-15 mA regulation loads; not suitable for 830 mW thermal profiles | Choose only for space-constrained designs requiring legacy footprint compatibility and lower power budgets |
Compared with BZT52H-B27,115, the BZT52C27,115 trades precision for cost in identical packaging, while MMSZ5256ET1G sacrifices 330 mW power headroom and lacks the 1.0 A surge rating-making the BZT52H-B27,115 optimal for industrial-grade 27 V regulation demanding stability, robustness, and thermal margin.
Availability
BZT52H-B27,115 is available at Aetrix Electronics and suitable for power supply feedback loops, overvoltage clamps, and analog voltage references requiring stable component supply across automotive-adjacent industrial, test equipment, and telecom infrastructure programs.
Supply support for BZT52H-B27,115 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
Nexperia is a global semiconductor expert delivering high-performance logic, discrete, and MOSFET devices with focus on efficiency, reliability, and miniaturization for mass-market electronics.
The BZT52H series belongs to Nexperia's general-purpose Zener diode product line, engineered for precision voltage regulation in compact SMT designs where thermal robustness and tight tolerance are essential.
FAQ
What is the Zener test current for BZT52H-B27,115?
The nominal Zener voltage of 26.5–27.5 V is specified at a test current of 2 mA, per Table 9 in the datasheet. This differs from older Zener families tested at 5 mA and reflects optimized regulation point for 27 V devices in the BZT52H series.
Can BZT52H-B27,115 be used in automotive applications?
No. The BZT52H-B27,115 is explicitly designated as non-automotive qualified per Revision 7 (January 2023) datasheet Section 13. Automotive alternatives require the "-Q" suffix (e.g., BZT52H-B27-Q) and undergo AEC-Q200 stress testing.
How does the SOD123F package affect thermal performance?
The SOD123F package achieves Rth(j-sp) = 150 K/W when soldered to a 1 cm² cathode pad on FR4, enabling full 830 mW dissipation at Tamb = 25 °C. Reducing pad area increases thermal resistance proportionally-designers must maintain minimum copper area per Figure 12 footprint.
What is the maximum reverse voltage before breakdown begins?
The maximum reverse voltage before reaching the specified Zener knee is 21.6 V, defined as VR in Table 9. At this voltage, reverse current remains ≤40 μA, ensuring negligible conduction until the 26.5 V lower Zener limit is reached.
BZT52H-B27,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT52H
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±2%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 18.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT52H-B27,115 FAQ
1.How can I place an order for BZT52H-B27,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-B27,115 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 BZT52H-B27,115 reliable?
The price and inventory of BZT52H-B27,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52H-B27,115 is usually 5 days.
3.What payment methods are accepted for BZT52H-B27,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-B27,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-B27,115?
BZT52H-B27,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-B27,115 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 BZT52H-B27,115?
For technical support, including BZT52H-B27,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-B27,115 requirements.
6.How does Aetrix verify that BZT52H-B27,115 is sourced from the original manufacturer or authorized distributors?
All BZT52H-B27,115 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 BZT52H-B27,115 meets industry standards.
7.What is the process for return or replacement of BZT52H-B27,115?
All BZT52H-B27,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-B27,115, 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 BZT52H-B27,115 part is unused and in its original packaging.
Return procedure for BZT52H-B27,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52H-B27,115 Tags
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