My Inquiry
My Account
Nexperia USA Inc. BZX84-C27,215
- Part No.:
- BZX84-C27,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-C27,215.pdf
- Description:
- DIODE ZENER 27V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:12,738
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX84-C27,215 from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 27 V nominal breakdown voltage at IZ = 2 mA, with 250 mW total power dissipation and 50 µA reverse current at VR = 21.6 V. It provides stable reference voltage in low-power linear regulators and overvoltage protection circuits for industrial sensor interfaces.
For engineers reviewing the BZX84-C27,215 datasheet, BZX84-C27,215 pinout, BZX84-C27,215 application, or BZX84-C27,215 equivalent, key selection criteria include Zener voltage tolerance (±5 %), thermal resistance (330 K/W to solder point), non-repetitive peak reverse power (40 W), and differential resistance (300 Ω max at IZ = 2 mA).
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining regulation by conducting reverse current above its specified Zener voltage. Its temperature coefficient of +18.9 mV/K at IZ = 2 mA indicates positive drift with junction temperature rise, requiring thermal design consideration in precision references.
The SOT23 package features an internal cathode tab (Pin 3) and isolated anode (Pin 1), with Pin 2 unconnected - enabling compact PCB layout while limiting thermal path to ambient (Rth(j-a) = 500 K/W) unless soldered to copper pour via the cathode pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 25.1 V to 28.9 V at IZ = 2 mA - defines usable regulation range under standard test conditions |
| Differential Resistance rdif | ≤300 Ω at IZ = 2 mA - determines output impedance and load regulation error |
| Reverse Current IR | ≤50 µA at VR = 21.6 V - sets minimum bias current needed to maintain regulation onset |
| Total Power Dissipation Ptot | 250 mW at Tamb ≤ 25 °C on FR4 PCB - limits continuous DC power handling without derating |
| Non-repetitive Peak Power PZSM | 40 W for tp = 100 µs - supports transient surge clamping in ESD or inductive kick protection |
| Junction Temperature Tj | −55 °C to +150 °C - constrains operating envelope in sealed enclosures or high-ambient environments |
Pinout & Package
Package: SOT23 (TO-236AB), 3-lead surface-mount plastic package with exposed cathode tab for thermal conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in shunt regulation configuration |
| 2 | Not Connected (n.c.) | Internally isolated; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress |
| 3 | Cathode (K) | Regulated output node; primary thermal path to PCB via soldered tab; connects to higher-potential rail |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-sensitive applications where tight regulation is not required, such as supply rail clamping |
| 250 mW power rating | Supports low-current biasing in microcontroller reset circuits and analog front-end references |
| 40 W non-repetitive peak power | Provides robust transient suppression for I/O line protection against ESD or inductive spikes |
| 330 K/W junction-to-solder-point thermal resistance | Allows effective heat transfer when cathode pad is connected to ≥1 cm² copper pour on inner layer |
| SOT23 footprint compatibility | Ensures drop-in replacement in legacy designs using JEDEC-standard 2.8 mm × 1.4 mm land pattern |
Applications
| Industrial Sensor Signal Conditioning | Microcontroller Reset Circuit |
|---|---|
|
Use Scenario: Stabilizing reference voltage for 12-bit ADC input scaling in temperature transmitters. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 27 V rail for op-amp gain-setting network. Use Value: Maintains <±1.5 % full-scale error across −40 °C to +85 °C ambient due to predictable +18.9 mV/K tempco compensation. |
Use Scenario: Generating clean power-on reset signal for ARM Cortex-M0+ MCU during 3.3 V supply ramp-up. IC Role / Device Role / Timing Role: Zener-clamped RC delay element defining reset pulse width and threshold. Use Value: Delivers consistent 27 V clamp level to ensure reset assertion until VDD exceeds 2.7 V, independent of capacitor aging. |
| RS-485 Transceiver Bus Protection | Low-Power LED Driver Bias |
|
Use Scenario: Protecting half-duplex RS-485 nodes from ±15 kV contact ESD per IEC 61000-4-2. IC Role / Device Role / Timing Role: Secondary clamping diode placed between A/B lines and ground, activated after TVS primary conduction. Use Value: Absorbs residual 40 W surge energy (100 µs) without degradation, preventing latch-up in transceiver ICs. |
Use Scenario: Setting constant-current bias for red LED indicator in battery-powered IoT endpoint. IC Role / Device Role / Timing Role: Series Zener reference in emitter-follower current source with NPN transistor. Use Value: Delivers stable 20 mA LED current across 2.8–4.2 V Li-ion battery range, minimizing brightness variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5256BS-7-F | 27 V ±5 %, 350 mW Ptot, Rth(j-a) = 420 K/W, rdif = 250 Ω | Higher power rating enables longer-duration surges but requires larger thermal pad | Select when >250 mW continuous dissipation is needed or tighter rdif improves load regulation |
| Vishay BZX84-C27-TP | 27 V ±5 %, 300 mW Ptot, Rth(j-a) = 450 K/W, rdif = 280 Ω, RoHS-compliant matte tin finish | Higher moisture sensitivity level (MSL3 vs MSL1) demands stricter reflow control | Select for high-volume automated assembly where extended floor life is critical |
Compared with BZX84-C27,215, the MMBZ5256BS-7-F offers superior thermal performance and lower dynamic impedance for precision biasing, while the BZX84-C27-TP trades marginally better power handling for tighter process control in high-yield SMT lines.
Availability
BZX84-C27,215 is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller reset circuits, RS-485 bus protection, and low-power LED driver bias requiring stable component supply and long-term obsolescence management.
Supply support for BZX84-C27,215 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 and industrial-grade components.
The BZX84 series belongs to Nexperia's general-purpose Zener diode product line, engineered for cost-effective voltage regulation and transient suppression in consumer, industrial, and computing applications.
FAQ
What is the maximum continuous reverse current this diode can handle at 27 V?
The BZX84-C27,215 does not specify a maximum continuous reverse current at 27 V; instead, it is limited by power dissipation. At 27 V, the absolute maximum DC current is 9.26 mA (250 mW ÷ 27 V), assuming Tamb ≤ 25 °C and no thermal derating. Operation above this requires PCB copper area or forced cooling.
Can this Zener diode be used in series to achieve higher regulated voltage?
Yes, multiple BZX84-C27,215 diodes may be connected in series to increase total Zener voltage, but each diode must share current equally. Uneven thermal coupling or mismatched tempcos (+18.9 mV/K each) will cause voltage drift; parallel operation is not recommended due to inherent parameter spread.
Is Pin 2 truly unused, or does it serve a mechanical function?
Pin 2 is electrically unconnected (n.c.) and serves no circuit function. Mechanically, it provides structural symmetry in the SOT23 mold compound and aids pick-and-place alignment, but must not be soldered or routed to avoid stress-induced die cracking or leakage paths.
How does the ±5 % tolerance affect accuracy in a 12-bit ADC reference application?
With ±5 % tolerance, the actual VZ ranges from 25.1 V to 28.9 V. In a 27 V reference driving a resistive divider for a 3.3 V ADC input, this introduces up to ±3.4 LSB error at full scale - acceptable for non-critical monitoring but insufficient for metrology-grade measurement without calibration.
BZX84-C27,215 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 18.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX84-C27,215 FAQ
1.How can I place an order for BZX84-C27,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-C27,215 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 BZX84-C27,215 reliable?
The price and inventory of BZX84-C27,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C27,215 is usually 5 days.
3.What payment methods are accepted for BZX84-C27,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C27,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-C27,215?
BZX84-C27,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-C27,215 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 BZX84-C27,215?
For technical support, including BZX84-C27,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C27,215 requirements.
6.How does Aetrix verify that BZX84-C27,215 is sourced from the original manufacturer or authorized distributors?
All BZX84-C27,215 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 BZX84-C27,215 meets industry standards.
7.What is the process for return or replacement of BZX84-C27,215?
All BZX84-C27,215 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C27,215, 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 BZX84-C27,215 part is unused and in its original packaging.
Return procedure for BZX84-C27,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-C27,215 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…
