My Inquiry
My Account
Nexperia USA Inc. BZX585-C27F
.jpg)
- Part No.:
- BZX585-C27F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-C27F.pdf
- Description:
- DIODE ZENER 27V SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:4,993
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX585-C27F from Nexperia is a Zener voltage regulator diode in SOD523 (SC-79) package, rated for 27 V nominal Zener voltage with ±5 % tolerance, 300 mW total power dissipation, and 40 W non-repetitive peak reverse power handling. It delivers low differential resistance (65 Ω at IZ = 2 mA) and operates across −65 °C to +150 °C junction temperature, used for precision voltage reference and overvoltage clamping in space-constrained power management circuits.
For engineers reviewing the BZX585-C27F datasheet, BZX585-C27F pinout, BZX585-C27F application, or BZX585-C27F equivalent, this page provides verified electrical specifications, thermal behavior, cathode/anode terminal mapping, real-world use cases in low-power regulation, and validated alternative parts with documented parameter differences.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable DC voltage under varying load and input conditions. Its 27 V nominal Zener voltage is specified at IZ = 2 mA, with temperature coefficient of +21.4 mV/K and reverse current ≤0.05 µA at VR = 20 V.
The device uses planar epitaxial construction for consistent breakdown characteristics and low leakage. Thermal resistance from junction to solder point is 65 K/W, enabling reliable operation on FR4 PCBs with minimal copper area, while its 1.7 mm × 0.85 mm SOD523 footprint supports high-density layout in portable and IoT electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 25.65 V to 28.35 V at IZ = 2 mA - defines regulated output voltage window under standard test condition |
| Tolerance | ±5 % - determines absolute accuracy band for voltage reference applications |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 PCB with 35 mm² cathode copper - sets continuous DC power limit in typical mounting |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W for tp = 100 µs square wave - enables transient surge suppression without failure |
| Differential Resistance (rdiff) | 65 Ω max at IZ = 2 mA - quantifies voltage regulation stiffness against load current variation |
| Reverse Current (IR) | ≤0.05 µA at VR = 20 V - ensures minimal leakage in standby or high-impedance bias networks |
| Junction Temperature Range | −65 °C to +150 °C - supports operation in extended industrial and automotive-adjacent environments |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead surface-mount plastic package: 1.70 mm × 0.85 mm body, 0.65 mm height, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low differential resistance | 65 Ω max at 2 mA - improves regulation accuracy under dynamic load changes |
| High surge capability | 40 W non-repetitive peak power - protects downstream circuitry from ESD or line transients |
| Ultra-compact SMD package | SOD523 (1.7 mm × 0.85 mm) - enables placement in wearables, hearing aids, and miniaturized sensor nodes |
| Wide operating temperature | −65 °C to +150 °C junction range - suitable for under-hood or industrial control environments |
| Low leakage current | ≤0.05 µA at 20 V reverse bias - preserves battery life in always-on monitoring circuits |
Applications
| Power Supply Rail Clamping | Microcontroller Voltage Reference |
|---|---|
Use Scenario: Protecting 3.3 V or 5 V logic rails from voltage spikes during hot-plug or switching events. IC Role / Device Role / Timing Role: Zener clamp placed between rail and ground to shunt excess energy above threshold. Use Value: Limits transient overvoltage to ≤27 V before breakdown, preventing latch-up or gate oxide damage in connected ICs. |
Use Scenario: Providing stable analog reference for ADCs or comparators in battery-powered sensor modules. IC Role / Device Role / Timing Role: Passive voltage reference source with predictable 27 V Zener point scaled via resistor divider. Use Value: Enables <±1% reference stability over temperature when combined with low-drift resistors and buffered output. |
| Low-Power Bias Network | ESD Protection Interface |
Use Scenario: Generating fixed bias points for op-amp input stages or transistor base drive in energy-harvesting systems. IC Role / Device Role / Timing Role: Provides precise DC offset using series resistor and Zener drop. Use Value: Delivers repeatable 27 V reference with <0.1 µA quiescent draw, extending multi-year battery life. |
Use Scenario: Front-end protection for USB, I²C, or GPIO lines exposed to human contact or cable discharge. IC Role / Device Role / Timing Role: Fast-acting shunt element that clamps ESD pulses before they reach sensitive inputs. Use Value: Absorbs 40 W peak surges per IEC 61000-4-2 Level 4 (8 kV contact), reducing system-level TVS count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-B27 | ±2 % tolerance (vs. ±5 %); tighter VZ spread (26.46–27.54 V) | Higher precision required in metrology or calibration circuits | Select when absolute voltage accuracy outweighs cost sensitivity |
| MMSZ5256ET1G | 27 V nominal, ±5 %, but SOD-123 package (2.7 mm × 1.4 mm) and 500 mW Ptot | Higher power handling needed; board space less constrained | Choose for legacy designs using SOD-123 footprints or where thermal margin >300 mW is critical |
Compared with BZX585-C27F, BZX585-B27 offers tighter regulation at same package size but higher unit cost, while MMSZ5256ET1G trades miniaturization for greater power capacity and wider industry footprint compatibility-making each optimal for distinct layout and accuracy priorities.
Availability
BZX585-C27F is available at Aetrix Electronics and suitable for low-power voltage reference, ESD protection interface, and microcontroller bias network applications requiring stable component supply and long-term obsolescence management.
Supply support for BZX585-C27F 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 technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
BZX585-C27F belongs to the BZX585 series of general-purpose Zener diodes designed for compact, high-accuracy voltage regulation in space-constrained and thermally demanding applications.
FAQ
What is the maximum continuous forward current rating for BZX585-C27F?
The BZX585-C27F is not intended for continuous forward conduction; its absolute maximum forward current is 200 mA per limiting values table, but forward operation is only specified for pulse testing (tp ≤ 300 µs). In normal Zener regulation use, it remains reverse-biased, so forward current is irrelevant to functional design.
Can BZX585-C27F be used in parallel for higher power dissipation?
No-Zener diodes exhibit negative temperature coefficients and mismatched breakdown voltages, causing current hogging and thermal runaway when paralleled. For higher power, use a single higher-rated Zener or implement active regulation with a transistor-based shunt circuit instead.
How does the 27 V Zener voltage behave across temperature?
At IZ = 2 mA, BZX585-C27F has a positive temperature coefficient of +21.4 mV/K, meaning its Zener voltage increases ~21.4 mV per degree Celsius rise in junction temperature-critical for applications requiring stable reference over wide ambient ranges.
Is the SOD523 package compatible with standard reflow profiles?
Yes-the SOD523 package is qualified for lead-free reflow per JEDEC J-STD-020, with peak temperature up to 260 °C. The recommended solder land pattern (1.4 mm × 0.4 mm pads, 0.5 mm spacing) is defined in Figure 12 of the datasheet for reliable assembly yield.
BZX585-C27F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- -
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 18.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX585-C27F FAQ
1.How can I place an order for BZX585-C27F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-C27F 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 BZX585-C27F reliable?
The price and inventory of BZX585-C27F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-C27F is usually 5 days.
3.What payment methods are accepted for BZX585-C27F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-C27F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-C27F?
BZX585-C27F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-C27F 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 BZX585-C27F?
For technical support, including BZX585-C27F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-C27F requirements.
6.How does Aetrix verify that BZX585-C27F is sourced from the original manufacturer or authorized distributors?
All BZX585-C27F 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 BZX585-C27F meets industry standards.
7.What is the process for return or replacement of BZX585-C27F?
All BZX585-C27F units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-C27F, 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 BZX585-C27F part is unused and in its original packaging.
Return procedure for BZX585-C27F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-C27F 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…
