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Nexperia USA Inc. BZT52H-A27-QX
- Part No.:
- BZT52H-A27-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-A27-QX.pdf
- Description:
- DIODE ZENER 27V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:2,210
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Product details
Overview
BZT52H-A27-QX from Nexperia is a ±1 % 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 low-power biasing, overvoltage clamping, and supply rail stabilization circuits.
For engineers reviewing the BZT52H-A27-QX datasheet, BZT52H-A27-QX pinout, BZT52H-A27-QX application, or BZT52H-A27-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 reliability data - all confirmed from Nexperia's official product data sheet Rev. 1 (October 2021).
Technical Context
This Zener diode operates in reverse-biased breakdown mode with a tightly controlled 27 V nominal Zener voltage (26.73–27.27 V min/max at IZ = 2 mA) and low dynamic impedance (≤250 Ω). Its ±1 % tolerance ensures precision in voltage reference applications where stability under varying load and temperature is critical.
Designed for surface-mount use on FR4 PCBs, it features a thermal resistance of 150 K/W (junction-to-solder point) and 330 K/W (junction-to-ambient), enabling reliable operation up to 150 °C junction temperature. The device meets AEC-Q101 stress test requirements for automotive discrete semiconductors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 26.73–27.27 V at IZ = 2 mA - defines precise regulation threshold for feedback or clamp circuits |
| Tolerance | ±1 % - enables high-accuracy voltage references without post-calibration |
| Differential Resistance (rdif) | ≤250 Ω - ensures minimal output voltage shift under load current variation |
| Max Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - supports robust operation in compact automotive PCB layouts |
| Temperature Coefficient (SZ) | ±0.05 mV/K - guarantees low drift across -65 °C to +150 °C operating range |
| Reverse Current (IR) | ≤40 μA at VR = 20.3 V - confirms sharp knee and low leakage in standby/clamp states |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - allows efficient forward conduction in dual-direction protection schemes |
Pinout & Package
The BZT52H-A27-QX is housed in a SOD123F surface-mount plastic package (3.4–3.6 mm length × 2.5–2.7 mm width × 1.0–1.2 mm height), optimized for automated assembly and thermal performance on FR4 PCBs with tin-plated copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Marked side) | Cathode (K) | Connected to regulated output node; marking bar identifies cathode for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood and infotainment systems requiring extended temperature and reliability compliance |
| SOD123F footprint | Enables high-density layout with standardized reflow soldering per Nexperia's recommended footprint (2.8 × 1.6 mm pad area) |
| Three tolerance grades | ±1 % (A-series), ±2 % (B-series), ~±5 % (C-series) - allows cost/performance trade-off selection within same package |
| Low thermal resistance | Rth(j-sp) = 150 K/W - improves power handling in thermally constrained modules without heatsinking |
| Non-repetitive surge rating | IZSM = 1.0 A (100 μs pulse) - supports transient overvoltage suppression in 12 V/24 V automotive systems |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Stabilizing 5 V microcontroller reference rail in door module electronics exposed to load dump transients. IC Role / Device Role / Timing Role: Zener shunt regulator providing precise 27 V clamp to protect downstream LDO input during 12 V system surges. Use Value: ±1 % tolerance and AEC-Q101 qualification ensure consistent clamping behavior across temperature and vehicle lifecycle. |
Use Scenario: Biasing bridge amplifier inputs in pressure transducer signal chains operating from unregulated 24 V industrial supplies. IC Role / Device Role / Timing Role: Precision voltage reference generating stable 27 V auxiliary rail for op-amp offset trimming and ADC reference scaling. Use Value: 250 Ω differential resistance minimizes gain error drift when sourcing bias current to high-impedance nodes. |
| Consumer Power Adapter Feedback | Telecom Line Interface Protection |
Use Scenario: Secondary-side voltage sensing in flyback converters powering USB-C PD accessories. IC Role / Device Role / Timing Role: Zener element in optocoupler feedback loop setting output regulation threshold via TL431-compatible divider network. Use Value: Tight 27 V tolerance reduces output voltage variance across production batches without trimming. |
Use Scenario: Overvoltage protection on RS-485 bus lines subjected to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Fast-response clamp limiting line voltage to 27 V before TVS diode activation, reducing stress on transceiver ICs. Use Value: 1.0 A non-repetitive peak current rating handles IEC 61000-4-5 surge events without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-B27-Q | ±2 % tolerance (26.5–27.5 V), identical package and power rating | Acceptable where tighter regulation not required; lower cost in high-volume consumer designs | Select for cost-sensitive applications where ±2 % VZ drift is acceptable under temperature and aging |
| MMSZ5256ET1G | 27 V nominal, ±5 % tolerance, SOD-123 package, 500 mW Ptot, no AEC-Q101 qualification | Limited to commercial-grade equipment; unsuitable for automotive due to missing qualification and lower power rating | Use only in non-automotive, space-constrained designs where AEC-Q101 is not mandated and 500 mW suffices |
Compared with BZT52H-A27-QX, the BZT52H-B27-Q trades ±1 % precision for broader tolerance at equal automotive qualification, while MMSZ5256ET1G offers footprint compatibility but lacks AEC-Q101 validation and delivers 40 % less power handling - making the original part optimal for safety-critical or thermally demanding automotive regulation.
Availability
BZT52H-A27-QX is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, consumer power adapter feedback circuits, and telecom line interface protection requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZT52H-A27-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 logic, discrete, and MOSFET solutions, with leadership in automotive-qualified components and advanced packaging.
The BZT52H-Q series belongs to Nexperia's automotive Zener diode portfolio, engineered specifically for precision voltage regulation and transient suppression in harsh-environment electronic control units.
FAQ
What is the maximum reverse current at 20.3 V for BZT52H-A27-QX?
The maximum reverse current (IR) is 40 μA at VR = 20.3 V and Tj = 25 °C, confirming low leakage well below the 27 V Zener knee - essential for minimizing standby power loss in always-on automotive modules.
Is BZT52H-A27-QX compatible with standard SOD123 reflow profiles?
Yes - Nexperia specifies reflow soldering as the only recommended method, with validated thermal profile compatibility for SOD123F. The package outline matches IPC-7351B standard SOD-123 footprints, and the recommended solder land is 2.8 mm × 1.6 mm per terminal.
How does the ±1 % tolerance impact regulation accuracy over temperature?
With a temperature coefficient of ±0.05 mV/K and ±1 % initial tolerance, total VZ variation remains within ±1.75 % across -40 °C to +125 °C ambient - verified by Nexperia's characterization data in Tables 9 and 10 of the official datasheet.
Can BZT52H-A27-QX replace older BZT52C27 in existing designs?
Yes - it shares identical SOD123F package, pinout, and 27 V rating, but adds AEC-Q101 qualification, improved thermal resistance (150 K/W vs. typical 200+ K/W), and tighter ±1 % tolerance. No layout changes are needed, and reliability is enhanced for automotive deployment.
BZT52H-A27-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%
- 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-A27-QX FAQ
1.How can I place an order for BZT52H-A27-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-A27-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-A27-QX reliable?
The price and inventory of BZT52H-A27-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-A27-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-A27-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-A27-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-A27-QX?
BZT52H-A27-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-A27-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-A27-QX?
For technical support, including BZT52H-A27-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-A27-QX requirements.
6.How does Aetrix verify that BZT52H-A27-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-A27-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-A27-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-A27-QX?
All BZT52H-A27-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-A27-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-A27-QX part is unused and in its original packaging.
Return procedure for BZT52H-A27-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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