My Inquiry
My Account
Nexperia USA Inc. BZT52-C27X
- Part No.:
- BZT52-C27X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52-C27X.pdf
- Description:
- DIODE ZENER 27V 350MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZT52-C27X from Nexperia is a ±5 % tolerance Zener diode in SOD123 package, rated for 27 V nominal Zener voltage at IZ = 2 mA, 50 mW differential resistance, and 590 mW total power dissipation at Tamb ≤ 25 °C; used for precision voltage reference and overvoltage clamping in low-power DC rails.
For engineers reviewing the BZT52-C27X datasheet, BZT52-C27X pinout, BZT52-C27X application, or BZT52-C27X equivalent, key selection criteria include Zener voltage tolerance (±5 %), thermal resistance (210 K/W junction-to-solder-point), reverse current < 0.05 μA at VR = 21.4 V, and SOD123 footprint compatibility with automated SMT assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage under varying load and temperature conditions. Its 27 V nominal Zener voltage is specified at 2 mA test current, with a temperature coefficient of +18.9 mV/K at IZ = 5 mA - indicating positive drift with rising junction temperature.
The device exhibits low dynamic impedance (50 Ω max) and minimal capacitance (50 pF at 1 MHz, VR = 0 V), enabling effective noise suppression and fast transient response in regulation and protection circuits without signal distortion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 25.1 V to 28.9 V at IZ = 2 mA - defines clamping threshold with ±5 % tolerance band for reliable overvoltage protection. |
| Differential Resistance (rdif) | 50 Ω max - ensures minimal output voltage variation under load changes, critical for stable reference accuracy. |
| Reverse Current (IR) | < 0.05 μA at VR = 21.4 V - guarantees negligible leakage in standby or high-impedance sensing nodes. |
| Total Power Dissipation (Ptot) | 590 mW at Tamb ≤ 25 °C on FR4 PCB with 1 cm² cathode pad - sets maximum continuous DC power handling in standard layout. |
| Thermal Resistance (Rth(j-sp)) | 210 K/W - quantifies junction-to-solder-point heat transfer efficiency, guiding thermal pad design for reliability at elevated ambient. |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - confirms low conduction loss when used in forward-biased polarity protection configurations. |
Pinout & Package
SOD123 surface-mount plastic package: 2.80 mm × 1.70 mm body, 0.70 mm lead pitch, cathode marked by molded band; optimized for reflow soldering per IPC-7095 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking band identifies this terminal for correct orientation during placement. |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction enabling Zener breakdown at 27 V. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Zener voltage range | Covers 2.4 V to 75 V in E24 steps - supports standardized voltage references across diverse supply domains. |
| Low differential resistance | 50 Ω max at 27 V - maintains tight regulation (< ±0.1 V) under ±1 mA load variation. |
| Small SMD footprint | SOD123 package (2.8 × 1.7 mm) - enables high-density PCB layouts and compatibility with 0402-class pick-and-place equipment. |
| Controlled temperature coefficient | +18.9 mV/K at IZ = 5 mA - allows predictable voltage drift compensation in temperature-sensitive analog circuits. |
Applications
| Power Supply Rail Clamping | Microcontroller I/O Protection |
|---|---|
|
Use Scenario: Clamp 3.3 V or 5 V logic rail against ESD or surge events exceeding 27 V. IC Role / Device Role / Timing Role: Zener acts as shunt protector, diverting excess current to ground before downstream ICs experience overvoltage stress. Use Value: Limits transient voltage to ≤28.9 V with sub-μA leakage, preserving signal integrity and preventing latch-up in CMOS inputs. |
Use Scenario: Protect GPIO pins of ARM Cortex-M microcontrollers from accidental 24 V field wiring faults. IC Role / Device Role / Timing Role: Functions as bidirectional clamp (forward diode + Zener), blocking >0.9 V forward and >27 V reverse excursions. Use Value: Enables direct interface with industrial sensors without external TVS arrays, reducing BOM count and board area. |
| Reference Voltage Source | Current Sink Biasing |
|
Use Scenario: Provide stable 27 V reference for ADC calibration or op-amp comparator thresholds in battery-powered instrumentation. IC Role / Device Role / Timing Role: Delivers fixed Zener voltage with 50 Ω dynamic impedance, minimizing sensitivity to supply ripple and load shifts. Use Value: Achieves ±0.2 V stability over 0–1 mA load range, supporting 12-bit measurement accuracy without active regulation. |
Use Scenario: Set constant current for LED biasing or phototransistor collectors in optical isolation circuits. IC Role / Device Role / Timing Role: Used in series with resistor to generate ~1 mA sink current via 27 V drop across Zener. Use Value: Maintains current within ±5 % across 0–70 °C ambient, eliminating need for precision resistors or current mirrors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5256BS | 27 V nominal, ±5 %, SOD-123, but rated Ptot = 300 mW (vs. 590 mW) | Limited to lower-power biasing due to 49 % lower power rating; unsuitable for sustained 27 V/10 mA operation | Select only where thermal budget is constrained and average power < 150 mW |
| Vishay BZX384-C27 | 27 V nominal, ±5 %, SOD-323 (1.7 × 1.3 mm), Ptot = 300 mW, rdif = 90 Ω | Smaller footprint but higher impedance and lower power - trades size for regulation precision and thermal headroom | Prefer for ultra-compact designs where 27 V stability under load is secondary to board space |
Compared with MMBZ5256BS and BZX384-C27, BZT52-C27X delivers superior thermal margin (590 mW vs. 300 mW) and tighter regulation (50 Ω vs. ≥90 Ω), making it optimal for applications requiring sustained 27 V clamping or reference stability under variable load and temperature.
Availability
BZT52-C27X is available at Aetrix Electronics and suitable for power supply rail clamping, microcontroller I/O protection, reference voltage sourcing, and current sink biasing requiring stable component supply and full traceability.
Supply support for BZT52-C27X 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, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
BZT52 series belongs to Nexperia's general-purpose Zener diode product line, engineered for cost-effective, surface-mount voltage regulation and protection in non-automotive applications with wide voltage coverage and tight tolerances.
FAQ
What is the Zener test current for BZT52-C27X?
The nominal Zener voltage of 27 V is specified at IZ = 2 mA, per Table 9 in the datasheet. This differs from the B-series variants (tested at 5 mA) and ensures consistent regulation behavior under typical low-current reference and protection use cases.
Can BZT52-C27X be used in automotive applications?
No - BZT52-C27X is explicitly designated as non-automotive qualified per the revision history (Section 13). It lacks AEC-Q200 qualification and is not tested to automotive temperature or reliability standards; Nexperia offers separate -Q qualified variants for such use.
How does the SOD123 package affect thermal performance?
The SOD123 package achieves Rth(j-sp) = 210 K/W when mounted with a 1 cm² cathode copper pad, enabling safe operation up to 150 °C junction temperature at 590 mW dissipation - significantly better than smaller packages like SOD-323 (Rth(j-sp) ≈ 300 K/W).
What is the maximum reverse voltage before breakdown?
The guaranteed Zener breakdown occurs between 25.1 V and 28.9 V at IZ = 2 mA. Below 21.4 V, reverse current remains below 0.05 μA - confirming sharp knee behavior and minimal leakage in pre-breakdown region.
BZT52-C27X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±7%
- Power - Max:
- 350 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:
- -55°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
BZT52-C27X FAQ
1.How can I place an order for BZT52-C27X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52-C27X 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 BZT52-C27X reliable?
The price and inventory of BZT52-C27X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52-C27X is usually 5 days.
3.What payment methods are accepted for BZT52-C27X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52-C27X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52-C27X?
BZT52-C27X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52-C27X 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 BZT52-C27X?
For technical support, including BZT52-C27X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52-C27X requirements.
6.How does Aetrix verify that BZT52-C27X is sourced from the original manufacturer or authorized distributors?
All BZT52-C27X 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 BZT52-C27X meets industry standards.
7.What is the process for return or replacement of BZT52-C27X?
All BZT52-C27X units undergo pre-shipment inspection (PSI). If there is an issue with BZT52-C27X, 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 BZT52-C27X part is unused and in its original packaging.
Return procedure for BZT52-C27X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52-C27X 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…
