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Nexperia USA Inc. BZX585-B13,135
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- Part No.:
- BZX585-B13,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-B13,135.pdf
- Description:
- DIODE ZENER 13V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:17,127
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Product details
Overview
BZX585-B13,135 from Nexperia is a ±2 % tolerance Zener diode with nominal 13 V regulation voltage in an SOD523 (SC-79) ultra-small 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 space-constrained DC power rails.
For engineers reviewing the BZX585-B13,135 datasheet, BZX585-B13,135 pinout, BZX585-B13,135 application, or BZX585-B13,135 equivalent, this part supports low-current regulation at 5 mA test current, features 25 Ω typical differential resistance and +7.0 mV/K temperature coefficient, and requires cathode-anode polarity awareness during PCB layout and soldering.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load conditions. It delivers 13 V nominal regulation at IZ = 5 mA with ±2 % tolerance, and exhibits a positive temperature coefficient of +7.0 mV/K - indicating voltage increases with junction temperature.
The device uses silicon PN-junction technology in a planar epitaxial construction, optimized for low leakage (<0.1 µA at VR = 10.4 V), fast transient response, and compatibility with standard reflow soldering profiles per JEDEC J-STD-020. Its SOD523 package enables high-density placement on compact PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 13 V at IZ = 5 mA - defines primary regulation point for feedback or clamp circuits |
| Tolerance | ±2 % - ensures tight voltage accuracy without post-production trimming |
| Differential Resistance (rdiff) | 25 Ω typ. at IZ = 5 mA - determines output impedance and load regulation error |
| Temperature Coefficient (SZ) | +7.0 mV/K - quantifies voltage drift per degree rise in junction temperature |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 with 35 mm² copper - sets continuous thermal limit |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 µs square wave - supports surge suppression in transient events |
| Reverse Current (IR) | ≤0.1 µA at VR = 10.4 V - defines leakage threshold before breakdown onset |
Pinout & Package
Package: SOD523 (SC-79), ultra-small flat-lead surface-mount plastic package with 2 terminals; dimensions: 1.25 mm × 0.85 mm × 0.65 mm (L × W × H); cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; accepts reverse bias; marking bar identifies this terminal |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low differential resistance | 25 Ω typical at 5 mA - improves regulation stability under load variation |
| Ultra-small SMD footprint | SOD523 package (1.25 × 0.85 mm) - enables high-density routing in portable and wearable electronics |
| Precision voltage tolerance | ±2 % at 5 mA - eliminates need for external trimming in mid-accuracy applications |
| Controlled temperature coefficient | +7.0 mV/K - allows predictable compensation in temperature-sensitive references |
| High surge capability | 40 W non-repetitive peak power - withstands ESD and inductive switching transients |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 13 V reference for linear regulator feedback or ADC reference buffer in battery-powered IoT sensors. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to fix reference node voltage independent of supply ripple. Use Value: Delivers ±2 % accuracy and <25 Ω dynamic impedance, reducing output error to <0.33 V over 0–5 mA load range. |
Use Scenario: Protecting microcontroller GPIO pins from 15 V transients induced by relay coil de-energization in industrial control modules. IC Role / Device Role / Timing Role: Shunt clamping element that conducts above 13 V to divert surge current away from sensitive inputs. Use Value: Activates within nanoseconds at 13 V, limiting clamped voltage to ≤13.5 V while absorbing up to 40 W for 100 µs. |
| Low-Power Bias Generator | Signal-Level Voltage Limiter |
|
Use Scenario: Generating a 13 V bias for op-amp input stage in analog front-end of medical pulse oximeter. IC Role / Device Role / Timing Role: Passive voltage source establishing DC operating point for amplifier input network. Use Value: Draws only 5 mA quiescent current, maintains <0.1 µA leakage below 10.4 V, and exhibits minimal noise contribution. |
Use Scenario: Limiting audio signal swing to ±13 V in line-level interface between DAC and Class AB amplifier in smart speaker design. IC Role / Device Role / Timing Role: Symmetrical clipping device (used with series resistor) preventing amplifier input saturation. Use Value: Provides sharp knee at 13 V with 25 Ω rdiff, ensuring clean waveform limiting without harmonic distortion buildup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-C13,135 | ±5 % tolerance vs. ±2 %; identical VZ = 13 V, package, and Ptot | Acceptable where cost sensitivity outweighs voltage accuracy requirements | Select for cost-driven consumer electronics where ±5 % regulation is sufficient |
| MMSZ5243B-7-F | ±5 % tolerance; 13 V nominal; SOD-123 package (2.7 × 1.4 mm); 500 mW Ptot | Larger footprint but higher continuous power handling; different thermal resistance | Choose when board space permits larger package and higher steady-state power is needed |
Compared with BZX585-C13,135, the BZX585-B13,135 offers tighter voltage control critical for precision references; versus MMSZ5243B-7-F, it trades 200 mW lower continuous power for 40 % smaller PCB area and optimized thermal performance in dense layouts.
Availability
BZX585-B13,135 is available at Aetrix Electronics and suitable for precision voltage reference, overvoltage clamp, and low-power bias generator applications requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for BZX585-B13,135 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 BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered for accurate, stable voltage regulation in space-constrained consumer, computing, and industrial power management circuits.
FAQ
What is the maximum continuous reverse current for BZX585-B13,135?
The maximum continuous reverse current is derived from its 300 mW total power dissipation rating and 13 V Zener voltage: IZ(max) = 300 mW / 13 V ≈ 23 mA. This assumes ambient temperature of 25 °C on FR4 with 35 mm² copper at the cathode tab, per datasheet condition.
Does BZX585-B13,135 support bidirectional ESD protection?
No - it is a unidirectional Zener diode configured for reverse-bias operation only. Its anode-cathode structure provides clamping only when cathode is at higher potential than anode; forward conduction (anode > cathode) yields ~1.1 V drop and is not designed for ESD handling.
How does the +7.0 mV/K temperature coefficient affect circuit design?
A +7.0 mV/K coefficient means the Zener voltage rises ~0.07 V per 10 °C rise in junction temperature. In thermally isolated designs, this can cause up to +0.7 V shift from 25 °C to 125 °C junction temperature, requiring derating or compensation in high-stability references.
Can BZX585-B13,135 be used in parallel for higher power dissipation?
No - Zener diodes exhibit manufacturing spread in VZ and rdiff, causing current imbalance. Even with matched units, thermal runaway risk exists due to positive temperature coefficient; parallel use is not recommended without active current balancing circuitry.
BZX585-B13,135 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):
- 13 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 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-B13,135 FAQ
1.How can I place an order for BZX585-B13,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-B13,135 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-B13,135 reliable?
The price and inventory of BZX585-B13,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-B13,135 is usually 5 days.
3.What payment methods are accepted for BZX585-B13,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-B13,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-B13,135?
BZX585-B13,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-B13,135 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-B13,135?
For technical support, including BZX585-B13,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-B13,135 requirements.
6.How does Aetrix verify that BZX585-B13,135 is sourced from the original manufacturer or authorized distributors?
All BZX585-B13,135 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-B13,135 meets industry standards.
7.What is the process for return or replacement of BZX585-B13,135?
All BZX585-B13,135 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-B13,135, 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-B13,135 part is unused and in its original packaging.
Return procedure for BZX585-B13,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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