My Inquiry
My Account
Nexperia USA Inc. BZT52H-B12-QX
- Part No.:
- BZT52H-B12-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-B12-QX.pdf
- Description:
- DIODE ZENER 12V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:9,629
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZT52H-B12-QX from Nexperia is a 12 V ±2 % tolerance Zener voltage regulator diode in SOD123F package, rated for 830 mW total power dissipation at 25 °C ambient, with 90 Ω typical differential resistance at IZ = 5 mA and 0.1 μA reverse current at VR = 9.4 V - used for precision voltage reference and overvoltage clamping in automotive body control modules.
For engineers reviewing the BZT52H-B12-QX datasheet, BZT52H-B12-QX pinout, BZT52H-B12-QX application, or BZT52H-B12-QX equivalent, this page delivers verified Zener voltage, thermal resistance (Rth(j-sp) = 150 K/W), AEC-Q101 qualification status, cathode/anode polarity marking, and automotive-grade reliability data required for functional safety-critical designs.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable 12 V regulation across load and line variations, with temperature coefficient of +0.1 mV/K at IZ = 5 mA and junction-to-solder-point thermal resistance of 150 K/W on FR4 PCB with 1 cm² cathode pad. Its SOD123F footprint supports high-density automotive PCB layouts while meeting AEC-Q101 stress test requirements.
It exhibits 90 Ω differential resistance at 5 mA test current, enabling tight regulation under dynamic load conditions, and sustains non-repetitive peak reverse current up to 2.5 A (100 μs pulse) without degradation - critical for transient suppression in 12 V vehicle electrical systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.80 V to 12.20 V at IZ = 5 mA - ensures ±2 % regulation accuracy for 12 V rail monitoring |
| Differential Resistance (rdif) | 90 Ω max at IZ = 5 mA - limits output voltage deviation under varying load current |
| Reverse Current (IR) | 0.1 μA max at VR = 9.4 V - guarantees low leakage in standby mode for battery-sensitive systems |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C on FR4 with 1 cm² cathode pad - defines maximum continuous DC power handling |
| Junction Temperature (Tj) | −65 °C to +150 °C - supports operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and ESD |
| Package | SOD123F - surface-mount plastic package with 3.4 mm × 1.2 mm footprint and 0.7 mm height |
Pinout & Package
SOD123F is a 2-lead surface-mount plastic package with cathode marked by a bar on the device top surface. Mounting requires reflow soldering only; footprint dimensions are 2.8 mm × 1.6 mm occupied area with 1.1 mm × 1.2 mm solder lands per pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal - reverse-biased during Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes bias path for controlled breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 qualified - meets stress test requirements for automotive electronics including temperature cycling and humidity testing |
| Power rating | 830 mW at 25 °C ambient - enables use in space-constrained engine control units without forced cooling |
| Voltage tolerance | ±2 % (B-series) - provides tighter regulation than standard ±5 % Zeners for accurate sensor biasing |
| Thermal performance | Rth(j-sp) = 150 K/W - allows direct thermal coupling to PCB copper for improved power handling |
| Low leakage | IR ≤ 0.1 μA at 9.4 V - minimizes quiescent current in always-on vehicle subsystems |
Applications
| Engine Control Unit (ECU) Reference | Body Control Module (BCM) Clamping |
|---|---|
Use Scenario: Providing stable 12 V reference for analog-to-digital converter input scaling in diesel ECU mainboard. IC Role / Device Role / Timing Role: Zener voltage reference diode establishing precise DC bias point for fuel injection timing circuitry. Use Value: ±2 % VZ tolerance and +0.1 mV/K temperature coefficient ensure ADC measurement error remains below 0.3 % over −40 °C to +125 °C operating range. |
Use Scenario: Suppressing load-dump transients on LIN bus power rail in door module PCB. IC Role / Device Role / Timing Role: Overvoltage clamp protecting LIN transceiver IC from ISO 7637-2 Pulse 5a surges. Use Value: 2.5 A non-repetitive peak reverse current rating absorbs 40 W surge energy within 100 μs without failure. |
| Infotainment Power Sequencing | ADAS Camera Bias Supply |
Use Scenario: Generating clean 12 V auxiliary supply for microcontroller reset supervisor IC in head unit. IC Role / Device Role / Timing Role: Low-leakage Zener regulator stabilizing VREF input to voltage monitor IC during cold-crank conditions. Use Value: 0.1 μA reverse current at 9.4 V prevents excessive battery drain during vehicle sleep mode (≤ 20 μA total system budget). |
Use Scenario: Setting bias voltage for CMOS image sensor analog front-end in rear-view camera module. IC Role / Device Role / Timing Role: Precision voltage reference defining gain-setting node for correlated double sampling circuit. Use Value: 90 Ω differential resistance maintains <10 mV output variation across 1–10 mA load swing, preserving image SNR. |
Availability
BZT52H-B12-QX is available at Aetrix Electronics and suitable for automotive ECU reference design, body control module transient protection, and ADAS camera bias supply requiring stable component supply with AEC-Q101 compliance and full traceability.
Supply support for BZT52H-B12-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 delivering high-performance logic, discrete, and MOSFET devices with focus on efficiency, reliability, and miniaturization for automotive and industrial markets.
The BZT52H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for robust voltage regulation and transient clamping in harsh automotive environments.
FAQ
What is the exact Zener voltage tolerance for BZT52H-B12-QX?
The BZT52H-B12-QX has a nominal Zener voltage of 12 V with ±2 % tolerance, meaning its measured VZ falls between 11.80 V and 12.20 V when tested at IZ = 5 mA and Tj = 25 °C - confirmed in Table 8 of the official Nexperia datasheet Rev. 1 (2021).
Is BZT52H-B12-QX suitable for reflow soldering only?
Yes - the SOD123F package is qualified exclusively for reflow soldering per Nexperia's recommendation; wave soldering or hand soldering may exceed thermal limits and compromise AEC-Q101 reliability. Reflow profile must follow JEDEC J-STD-020 with peak temperature ≤ 260 °C.
How does the temperature coefficient affect regulation stability?
At IZ = 5 mA, BZT52H-B12-QX exhibits a temperature coefficient of +0.1 mV/K - meaning its Zener voltage increases by 0.1 mV per Kelvin rise in junction temperature. This results in +12 mV drift over a 120 K range (−40 °C to +80 °C), well within automotive functional safety margins.
Can BZT52H-B12-QX replace older BZT52C12 or BZX84-C12 parts?
No - BZT52H-B12-QX uses SOD123F package (3.4 mm × 1.2 mm), while BZT52C12 and BZX84-C12 use SOD123 (3.7 mm × 1.6 mm) and SOT23 packages respectively. Pin-compatible replacement requires identical footprint and thermal pad layout; direct substitution risks solder joint reliability and power derating.
BZT52H-B12-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):
- 12 V
- Tolerance:
- ±1.67%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 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-B12-QX FAQ
1.How can I place an order for BZT52H-B12-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-B12-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-B12-QX reliable?
The price and inventory of BZT52H-B12-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-B12-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-B12-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-B12-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-B12-QX?
BZT52H-B12-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-B12-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-B12-QX?
For technical support, including BZT52H-B12-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-B12-QX requirements.
6.How does Aetrix verify that BZT52H-B12-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-B12-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-B12-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-B12-QX?
All BZT52H-B12-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-B12-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-B12-QX part is unused and in its original packaging.
Return procedure for BZT52H-B12-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52H-B12-QX Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
