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Nexperia USA Inc. BZT52H-C27-QX
- Part No.:
- BZT52H-C27-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-C27-QX.pdf
- Description:
- DIODE ZENER 27V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:5,675
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Product details
Overview
BZT52H-C27-QX from Nexperia is a 27 V ±5 % tolerance Zener diode in SOD123F package, rated for 830 mW total power dissipation at 25 °C ambient, with 250 mA maximum forward current and 1.0 A non-repetitive peak reverse current, used for precision voltage regulation in automotive power supply rails.
For engineers reviewing the BZT52H-C27-QX datasheet, BZT52H-C27-QX pinout, BZT52H-C27-QX application, or BZT52H-C27-QX equivalent, this device supports stable reference generation in engine control units, ADAS sensor biasing, and infotainment system overvoltage protection where AEC-Q101 qualification and tight voltage tolerance are required.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable 27 V reference across its terminals under regulated current conditions (IZ = 2 mA), with differential resistance of 250 Ω and temperature coefficient of +0.05 mV/K - indicating minimal drift over temperature. It exhibits low reverse leakage (≤40 μA at VR = 22.8 V) and fast response to transient overvoltage events.
The device uses planar epitaxial construction for robustness and reliability, qualified per AEC-Q101 for automotive use, and features a cathode-marked SOD123F package optimized for reflow soldering on FR4 PCBs with 1 cm² cathode pad for thermal management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 27 V nominal, ±5 % tolerance at IZ = 2 mA - ensures predictable clamping level in 24 V automotive systems. |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C with 1 cm² cathode pad - enables sustained regulation without derating in compact layouts. |
| Differential Resistance (rdif) | 250 Ω max at IZ = 2 mA - limits output voltage variation under load changes in feedback or reference circuits. |
| Reverse Current (IR) | ≤40 μA at VR = 22.8 V - minimizes standby power loss in always-on vehicle modules. |
| Non-repetitive Peak Reverse Current (IZSM) | 1.0 A for tp = 100 μs - provides surge immunity against load-dump transients per ISO 7637-2. |
| Junction Temperature (Tj) | −65 °C to +150 °C - supports operation in under-hood environments including engine compartments. |
| Thermal Resistance (Rth(j-sp)) | 70 K/W junction-to-solder-point - allows efficient heat transfer to PCB copper when mounted per recommended footprint. |
Pinout & Package
SOD123F surface-mount plastic package: 2-terminal, flat lead, cathode-bar marked, dimensions 3.6 mm × 1.7 mm × 1.0 mm (L × W × H), optimized for automated placement and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal - must be routed to lower-potential side of circuit for proper Zener conduction. |
| 2 | Anode (A) | Connected to ground or return path; reverse-biased configuration requires anode at lower potential than cathode to enable breakdown regulation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical stress - suitable for ECU, body control, and ADAS applications. |
| ±5 % Zener voltage tolerance | Enables cost-effective regulation without trimming while maintaining compliance with 24 V system ±10 % supply envelopes. |
| 830 mW power rating with thermal pad | Supports continuous regulation in space-constrained modules without external heatsinking when using 1 cm² cathode copper area. |
| Low 250 Ω dynamic impedance | Reduces output voltage deviation under varying load currents - critical for stable biasing of analog sensors and op-amps. |
| 1.0 A surge capability (100 μs) | Withstands ISO 7637-2 Pulse 5a load-dump events without degradation - eliminates need for supplemental TVS in many front-end designs. |
Applications
| Engine Control Unit (ECU) Reference | ADAS Camera Bias Supply |
|---|---|
Use Scenario: Providing stable 27 V reference for microcontroller ADC reference and sensor excitation in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Zener voltage regulator establishing precise DC reference point independent of battery voltage fluctuations (9–16 V). Use Value: Maintains <1 % reference error over −40 °C to +125 °C ambient, enabling accurate air-fuel ratio calculation and knock detection. |
Use Scenario: Biasing CMOS image sensor pixel arrays and analog front-end amplifiers in forward-facing radar/camera fusion modules. IC Role / Device Role / Timing Role: Precision shunt regulator supplying clean, low-noise 27 V rail to high-gain analog signal chains. Use Value: 40 μA max reverse leakage prevents dark-current injection into sensor pixels, preserving SNR and dynamic range. |
| Infotainment System Overvoltage Clamp | Body Control Module (BCM) Voltage Monitor |
Use Scenario: Clamping 12/24 V supply lines against load-dump transients in head unit power inputs. IC Role / Device Role / Timing Role: Fast-acting shunt protector diverting surge energy to ground before downstream LDOs or PMICs are stressed. Use Value: 1.0 A non-repetitive peak current rating handles ISO 7637-2 Pulse 5a (100 μs, 60 V) without failure or parameter shift. |
Use Scenario: Monitoring 24 V battery rail integrity via comparator input referenced to Zener-stabilized 27 V threshold in door module controllers. IC Role / Device Role / Timing Role: Stable voltage reference source for undervoltage/overvoltage detection logic. Use Value: ±5 % tolerance and +0.05 mV/K tempco ensure trip point accuracy remains within ±0.3 V across full automotive temperature range. |
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, 250 Ω rdif, same 27 V nominal and SOD123F package | Higher precision required for reference-sensitive analog circuits (e.g., precision ADC buffers) | Select when tighter voltage stability outweighs cost sensitivity; identical thermal and surge performance. |
| MMSZ5256ET1G | 27 V ±5 %, SOD-123 package, 500 mW Ptot, 350 Ω rdif, not AEC-Q101 qualified | Consumer or industrial power supplies where automotive qualification is unnecessary | Choose only for non-automotive designs; lower power rating and unqualified reliability limit use in vehicular systems. |
Compared with BZT52H-C27-QX, the BZT52H-B27-Q offers tighter tolerance for reference-critical functions but same surge and thermal behavior, while MMSZ5256ET1G lacks AEC-Q101 validation and delivers lower power handling - making it unsuitable for automotive deployment despite matching nominal voltage.
Availability
BZT52H-C27-QX is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, and infotainment power management requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for BZT52H-C27-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 essential efficiency-enhancing components, delivering high-performance, reliable, and scalable solutions for automotive, industrial, and consumer markets.
The BZT52H-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for robust voltage regulation and transient suppression in harsh-temperature vehicle subsystems.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZT52H-C27-QX has a nominal Zener voltage of 27 V at IZ = 2 mA, with a guaranteed breakdown range of 25.1 V to 28.9 V (±5 %). Its absolute maximum non-repetitive peak reverse voltage is limited by the 40 W surge rating - corresponding to ~60 V for 100 μs pulses per ISO 7637-2 Pulse 5a testing conditions.
Is this diode suitable for use in a 12 V automotive system?
Yes - although rated at 27 V, the BZT52H-C27-QX is commonly used as a clamp or reference in 12 V/24 V dual-voltage architectures. Its 27 V breakdown ensures it remains fully off during normal 12 V operation (including cranking dips and alternator overshoot), activating only during overvoltage faults like load dump.
How does the SOD123F package differ from standard SOD-123 in thermal performance?
The SOD123F package features a flattened lead profile and optimized internal die attach, achieving Rth(j-sp) = 70 K/W - 20 K/W lower than typical SOD-123 - due to enhanced thermal path from junction to solder point. This requires strict adherence to the specified 1 cm² cathode pad for rated 830 mW dissipation.
Can this Zener diode replace a TVS diode for surge protection?
No - while it handles 1.0 A surges for 100 μs, the BZT52H-C27-QX is not designed for repetitive or high-energy transients. It lacks the clamping voltage flatness and energy absorption capacity of dedicated TVS devices. Use it for regulation and light-duty clamping; pair with a TVS for full ISO 7637-2 compliance.
BZT52H-C27-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:
- ±7.04%
- 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-C27-QX FAQ
1.How can I place an order for BZT52H-C27-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-C27-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-C27-QX reliable?
The price and inventory of BZT52H-C27-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-C27-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-C27-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-C27-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-C27-QX?
BZT52H-C27-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-C27-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-C27-QX?
For technical support, including BZT52H-C27-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-C27-QX requirements.
6.How does Aetrix verify that BZT52H-C27-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-C27-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-C27-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-C27-QX?
All BZT52H-C27-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-C27-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-C27-QX part is unused and in its original packaging.
Return procedure for BZT52H-C27-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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