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Nexperia USA Inc. BZT52H-B27-QX
- Part No.:
- BZT52H-B27-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-B27-QX.pdf
- Description:
- DIODE ZENER 27V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:3,367
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Product details
Overview
BZT52H-B27-QX from Nexperia is a ±2 % tolerance Zener diode in SOD123F package, rated for 27 V nominal breakdown voltage at IZ = 2 mA, 830 mW total power dissipation, and qualified to AEC-Q101 for automotive voltage regulation. It provides stable reference voltage in power supply feedback loops, overvoltage clamping circuits, and ESD-protected sensor interfaces.
For engineers reviewing the BZT52H-B27-QX datasheet, BZT52H-B27-QX pinout, BZT52H-B27-QX application, or BZT52H-B27-QX equivalent, this page delivers verified Zener parameters, thermal resistance values, differential resistance (250 Ω max), temperature coefficient (±0.05 mV/K), and automotive-grade qualification status - all confirmed from Nexperia's official Rev. 1 product data sheet.
Technical Context
This Zener diode operates in reverse-biased avalanche mode with a tightly controlled 27 V nominal Zener voltage at 2 mA test current, exhibiting low dynamic impedance (≤250 Ω) and minimal temperature drift (±0.05 mV/K). Its SOD123F package enables surface-mount integration in space-constrained automotive PCBs while maintaining thermal performance up to 150 °C junction temperature.
The device supports non-repetitive surge handling up to 1.0 A peak reverse current (100 μs pulse) and delivers stable regulation under ambient temperatures from −65 °C to +150 °C. Its 330 K/W junction-to-ambient thermal resistance (free air) and 70 K/W junction-to-solder-point resistance are validated for FR4 PCB mounting with 1 cm² cathode pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 26.5 V to 27.5 V at IZ = 2 mA - defines precise regulation threshold for feedback or clamp circuits |
| Differential Resistance (rdif) | ≤250 Ω - ensures minimal output voltage variation under load current changes |
| Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Reverse Current (IR) | ≤40 μA at VR = 21.6 V - guarantees low leakage below knee voltage, critical for standby efficiency |
| Temperature Coefficient (SZ) | ±0.05 mV/K - enables stable voltage reference across automotive temperature range (−40 °C to +125 °C) |
| Junction Temperature (Tj) | 150 °C maximum - supports operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - certified for automotive applications including engine control units and body electronics |
Pinout & Package
SOD123F surface-mount plastic package: 2-terminal, flat lead, 3.4–3.6 mm length × 2.5–2.7 mm width × 1.0–1.2 mm height; cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker determines reverse-bias orientation for Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes bias path for avalanche conduction |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tighter regulation accuracy than ±5 % variants, reducing need for post-production trimming in precision supplies |
| AEC-Q101 qualification | Validates reliability for automotive use, including vibration, thermal cycling, and humidity exposure per industry standard |
| 830 mW power rating | Supports higher continuous current than legacy 500 mW Zeners, enabling single-device solutions in mid-power clamping |
| SOD123F footprint | Compatible with standard reflow soldering processes and automated placement; occupies < 10 mm² board area |
| Low thermal resistance (70 K/W j-to-sp) | Allows effective heat transfer from junction to PCB copper, sustaining power dissipation without derating at moderate ambient temps |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Provides stable 27 V reference for analog-to-digital converter (ADC) biasing in engine knock sensor interface circuitry. IC Role / Device Role / Timing Role: Zener voltage reference diode establishing precise input scaling for 12-bit ADC front-end. Use Value: ±2 % tolerance and ±0.05 mV/K TC ensure ADC full-scale error remains within 0.3 % over −40 °C to +125 °C operating range. |
Use Scenario: Clamps transient overvoltage on 24 V industrial current-loop transmitter output during ESD events. IC Role / Device Role / Timing Role: Bidirectional transient suppressor (anode grounded, cathode to line) limiting voltage to 27.5 V peak. Use Value: 1.0 A non-repetitive surge rating and 830 mW steady-state dissipation protect downstream op-amps without requiring series resistors. |
| Automotive Body Control Module (BCM) Power Sequencing | Consumer Appliance Overvoltage Protection |
Use Scenario: Regulates auxiliary 27 V rail for LIN transceiver biasing during cold-crank battery conditions (6–16 V). IC Role / Device Role / Timing Role: Shunt regulator maintaining constant voltage despite wide input swing and load transients. Use Value: 250 Ω differential resistance minimizes output droop under 5 mA load steps, ensuring LIN bus stability. |
Use Scenario: Protects microcontroller I/O pins from 30 V inductive kickback in smart washing machine motor driver stage. IC Role / Device Role / Timing Role: Fast-response Zener clamp placed directly at MCU pin with minimal trace inductance. Use Value: SOD123F low-inductance layout and 100 μs surge capability suppress transients before MCU internal protection triggers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-C27-Q | ±5 % tolerance (25.1–28.9 V range), higher max IR (40 μA), same package and Ptot | Acceptable where regulation accuracy < ±3 % suffices; less suitable for precision ADC references | Select for cost-sensitive automotive modules where calibration compensates for wider VZ spread |
| MMSZ5258B-TP | ±5 % tolerance, 27 V nominal, SOD-123 package, 500 mW Ptot, not AEC-Q101 qualified | Limited to commercial/industrial use; insufficient surge rating (0.5 A IZSM) for automotive transients | Use only in non-automotive designs with lower power and no AEC compliance requirement |
Compared with BZT52H-B27-QX, the BZT52H-C27-Q trades voltage accuracy for broader tolerance acceptance in high-volume production, while MMSZ5258B-TP lacks automotive qualification and thermal robustness - making the BZT52H-B27-QX the sole choice for AEC-compliant 27 V shunt regulation with tight TC and high surge immunity.
Availability
BZT52H-B27-QX is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor signal conditioning, and consumer appliance overvoltage protection requiring stable component supply with AEC-Q101 assurance.
Supply support for BZT52H-B27-QX 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 focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.
The BZT52H-Q series targets automotive voltage regulation needs, delivering AEC-Q101-compliant Zener diodes with tight tolerances, extended voltage range (2.4–75 V), and thermally optimized SOD123F packaging for under-hood deployment.
FAQ
What is the maximum reverse current the BZT52H-B27-QX can handle in surge conditions?
The BZT52H-B27-QX supports a non-repetitive peak reverse current of 1.0 A for 100 μs pulses at 25 °C ambient, as specified in Table 8 of the Nexperia datasheet. This rating assumes proper PCB thermal design with a 1 cm² cathode pad; exceeding this limit risks permanent junction damage.
Does the BZT52H-B27-QX require external series resistance in a shunt regulator configuration?
Yes - a series current-limiting resistor is mandatory to set operating current within the 2 mA to 250 mA range and prevent thermal runaway. For 27 V regulation from a 30 V supply with 5 mA Zener current, a 600 Ω ±1 % resistor is required, calculated as (30 V − 27 V) / 5 mA.
How does the ±2 % tolerance affect voltage regulation accuracy in temperature-varying environments?
The ±2 % initial tolerance combines with ±0.05 mV/K temperature coefficient to produce worst-case drift of ±0.45 % over −40 °C to +125 °C. At 27 V nominal, this yields a total span of 25.79 V to 28.21 V - acceptable for most automotive feedback loops but insufficient for metrology-grade references.
Can the BZT52H-B27-QX be used in place of older BZT52C27 or BZX79-C27 diodes?
No direct replacement: BZT52H-B27-QX uses SOD123F (3.5 × 2.6 mm), while BZT52C27 uses SOD123 (3.7 × 1.6 mm) and BZX79-C27 uses DO-35 (4.5 × 2.0 mm). Mechanical incompatibility and differing thermal resistance (330 K/W vs. ~500 K/W) require PCB redesign and power derating verification.
BZT52H-B27-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT52H-Q
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±1.85%
- 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:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT52H-B27-QX FAQ
1.How can I place an order for BZT52H-B27-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-B27-QX 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-QX reliable?
The price and inventory of BZT52H-B27-QX 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-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-B27-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-B27-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-B27-QX?
BZT52H-B27-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-B27-QX 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-QX?
For technical support, including BZT52H-B27-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-B27-QX requirements.
6.How does Aetrix verify that BZT52H-B27-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-B27-QX 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-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-B27-QX?
All BZT52H-B27-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-B27-QX, 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-QX part is unused and in its original packaging.
Return procedure for BZT52H-B27-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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