My Inquiry
My Account
Nexperia USA Inc. BZX585-C68,115
.jpg)
- Part No.:
- BZX585-C68,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-C68,115.pdf
- Description:
- DIODE ZENER 68V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:6,148
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX585-C68,115 from Nexperia is a 68 V ±5 % Zener voltage regulator diode in SOD523 (SC-79) surface-mount package, rated for 300 mW total power dissipation and 40 W non-repetitive peak reverse power, used for precision voltage reference and overvoltage protection in low-power analog circuits.
For engineers reviewing the BZX585-C68,115 datasheet, BZX585-C68,115 pinout, BZX585-C68,115 application, or BZX585-C68,115 equivalent, this device serves as a compact, low-capacitance (≤0.05 pF at 1 MHz) voltage clamp with 150 Ω typical differential resistance at IZ = 2 mA and temperature coefficient of +71.7 mV/K - critical for stable biasing in sensor interfaces and power supply feedback loops.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable 68 V reference across its terminals under controlled current conditions. Its SC-79 package enables high-density PCB layouts while supporting reflow soldering per JEDEC J-STD-020.
It exhibits a positive temperature coefficient (+71.7 mV/K at IZ = 2 mA), low reverse leakage (<0.05 µA at VR = 54.4 V), and thermal resistance of 65 K/W from junction to solder point - enabling reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 64.6 V to 71.4 V at IZ = 2 mA - defines precise clamping threshold for overvoltage protection |
| Differential Resistance (rdiff) | 150 Ω typical at IZ = 2 mA - determines regulation stiffness and output impedance |
| Temperature Coefficient (SZ) | +71.7 mV/K at IZ = 2 mA - quantifies voltage drift with ambient temperature change |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 PCB with 35 mm² copper - sets continuous thermal operating limit |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W for tp = 100 µs square wave - supports transient surge suppression without failure |
| Reverse Current (IR) | <0.05 µA at VR = 54.4 V - ensures minimal leakage in standby or high-impedance sensing nodes |
| Diode Capacitance (Cd) | 0.05 pF at f = 1 MHz, VR = 0 V - enables use in RF-coupled or high-speed signal path applications |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead surface-mount plastic package with cathode band marking; dimensions: 1.25 mm × 0.85 mm × 0.65 mm (L × W × H), 2-terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marked by bar on package; carries reverse-biased current during regulation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SOD523 footprint | Enables placement in space-constrained designs such as wearables and IoT sensor nodes |
| ±5 % Zener voltage tolerance | Supports cost-sensitive applications where tight regulation is not required but predictable clamping is essential |
| Low differential resistance | 150 Ω typical ensures minimal voltage shift under load variation in reference circuits |
| High surge robustness | 40 W non-repetitive peak power rating allows handling of ESD and inductive kickback transients |
| Low junction-to-solder-point thermal resistance | 65 K/W enables efficient heat transfer to PCB copper, improving reliability in thermally dense layouts |
Applications
| Power Supply Feedback | Sensor Bias Reference |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side regulation. IC Role / Device Role / Timing Role: Zener diode provides fixed reference voltage for optocoupler-based error amplifier input. Use Value: 68 V clamping prevents overvoltage damage to optocoupler LED while maintaining loop stability via low capacitance (0.05 pF). |
Use Scenario: Supplying stable bias to high-impedance MEMS pressure sensor elements. IC Role / Device Role / Timing Role: Acts as precision shunt reference to set sensor excitation voltage independent of supply ripple. Use Value: ±5 % tolerance and +71.7 mV/K tempco allow calibrated offset compensation in industrial-grade sensor modules. |
| Overvoltage Clamp | ESD Protection Node |
Use Scenario: Protecting microcontroller GPIO pins from accidental 72 V transients in automotive body control modules. IC Role / Device Role / Timing Role: Shunt limiter that conducts above 68 V to divert surge energy to ground. Use Value: 40 W non-repetitive peak power rating absorbs 100 µs surges without degradation, validated per IEC 61000-4-5. |
Use Scenario: Secondary-stage protection on USB data lines exposed to human-body-model ESD events. IC Role / Device Role / Timing Role: Low-capacitance (0.05 pF) Zener placed between D+ and ground to clamp fast-rising ESD pulses. Use Value: Minimal signal distortion due to sub-0.1 pF capacitance preserves 480 Mbps USB 2.0 eye diagram integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-B68,115 | Same package and 68 V nominal rating, but ±2 % tolerance and lower rdiff (120 Ω typ) | Preferred for precision reference circuits requiring tighter voltage accuracy and lower dynamic impedance | Select when regulation stability under varying load current is critical; higher cost than C-series |
| MMSZ5263B-7-F | 68 V ±5 %, SOD-123 package (2.7 mm × 1.4 mm), Ptot = 500 mW, rdiff = 110 Ω typ | Better thermal performance and higher continuous power, but larger footprint incompatible with ultra-dense layouts | Choose when board space permits and higher steady-state power handling is needed; not drop-in compatible |
Compared with BZX585-B68,115, the C68 offers relaxed tolerance at lower cost and identical form factor; versus MMSZ5263B-7-F, it trades 200 mW extra power for 55 % smaller area - making it optimal for miniaturized, cost-sensitive, low-duty-cycle clamp designs.
Availability
BZX585-C68,115 is available at Aetrix Electronics and suitable for power supply feedback, sensor bias reference, overvoltage clamp, and ESD protection applications requiring stable component supply with consistent parametric performance across production lots.
Supply support for BZX585-C68,115 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 leading semiconductor manufacturer specializing in high-volume, high-reliability discrete and logic devices, headquartered in Nijmegen, Netherlands, with global manufacturing and distribution infrastructure.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered for compact, low-cost voltage regulation and transient suppression in consumer, industrial, and computing applications.
FAQ
What is the maximum continuous reverse current for BZX585-C68,115?
The maximum continuous reverse current is derived from its 300 mW power rating and 68 V Zener voltage, yielding approximately 4.4 mA (300 mW ÷ 68 V). This assumes operation at 25 °C ambient with adequate PCB copper area; derating is required at elevated temperatures per the thermal resistance spec of 350 K/W junction-to-ambient.
Can BZX585-C68,115 be used in series for higher voltage regulation?
No - Zener diodes are not recommended for series connection due to mismatched temperature coefficients and breakdown characteristics. The BZX585-C68,115 has a +71.7 mV/K coefficient; stacking units would cause unequal voltage sharing and thermal runaway. Use a single higher-voltage Zener or active regulation instead.
Is the SOD523 package compatible with standard reflow profiles?
Yes - the SOD523 package is qualified for lead-free reflow per JEDEC J-STD-020. Recommended peak temperature is 260 °C for ≤30 seconds, with ramp rates ≤3 °C/s. The cathode tab must be soldered to ≥35 mm² of 1 oz copper for thermal compliance, as specified in the datasheet's thermal characteristics table.
How does the 0.05 pF capacitance impact high-frequency circuit design?
The 0.05 pF junction capacitance (measured at 1 MHz, 0 V) minimizes loading on RF signal paths and high-speed digital lines. In practice, it introduces negligible phase shift below 1 GHz and avoids resonance issues in 50 Ω systems - making it suitable for ESD protection on USB 2.0, CAN FD, and LVDS interfaces without signal integrity compromise.
BZX585-C68,115 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):
- 68 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 240 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 47.6 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-C68,115 FAQ
1.How can I place an order for BZX585-C68,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-C68,115 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-C68,115 reliable?
The price and inventory of BZX585-C68,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-C68,115 is usually 5 days.
3.What payment methods are accepted for BZX585-C68,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-C68,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-C68,115?
BZX585-C68,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-C68,115 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-C68,115?
For technical support, including BZX585-C68,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-C68,115 requirements.
6.How does Aetrix verify that BZX585-C68,115 is sourced from the original manufacturer or authorized distributors?
All BZX585-C68,115 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-C68,115 meets industry standards.
7.What is the process for return or replacement of BZX585-C68,115?
All BZX585-C68,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-C68,115, 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-C68,115 part is unused and in its original packaging.
Return procedure for BZX585-C68,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-C68,115 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…
