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Nexperia USA Inc. BZX585-C36F
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- Part No.:
- BZX585-C36F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-C36F.pdf
- Description:
- DIODE ZENER 36V SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:7,445
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Product details
Overview
BZX585-C36F from Nexperia is a ±5 % tolerance Zener diode in SOD523 (SC-79) package, rated for 36 V nominal Zener voltage at 2 mA test current, 300 mW total power dissipation, and 40 W non-repetitive peak reverse power. It delivers low differential resistance (80 Ω typ. at IZ = 2 mA) and operates across −65 °C to +150 °C junction temperature range, serving as a precision voltage reference in compact power management circuits.
For engineers reviewing the BZX585-C36F datasheet, BZX585-C36F pinout, BZX585-C36F application, or BZX585-C36F equivalent, key selection criteria include its 36 V regulation accuracy under low-current bias (2 mA), thermal resistance of 65 K/W (junction-to-solder point), SC-79 footprint compatibility with high-density PCB layouts, and verified performance in overvoltage clamping and analog reference stabilization.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals when reverse-biased above its specified Zener voltage. Its 36 V nominal working voltage is defined at IZ = 2 mA with ±5 % tolerance, and it exhibits a positive temperature coefficient of +33.0 mV/K at that current, enabling predictable drift behavior in temperature-varying environments.
The device supports transient suppression via 40 W non-repetitive peak reverse power handling (tp = 100 µs, square wave), while maintaining steady-state regulation within 300 mW total power dissipation on FR4 PCB with 35 mm² copper area. Its 0.05 µA maximum reverse leakage at 28.8 V ensures minimal quiescent current draw in battery-sensitive designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 34.2 V min / 37.8 V max at IZ = 2 mA - defines regulation band for precision reference use |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C - sets continuous DC bias limit on standard FR4 PCB |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W at tp = 100 µs - enables short-duration surge clamping without failure |
| Differential Resistance (rdiff) | 80 Ω typ. at IZ = 2 mA - determines output impedance and load regulation sensitivity |
| Reverse Leakage Current (IR) | 0.05 µA max at VR = 28.8 V - ensures negligible standby current in low-power systems |
| Temperature Coefficient (SZ) | +33.0 mV/K typ. at IZ = 2 mA - quantifies voltage drift per degree Celsius rise |
| Junction-to-Solder-Point Thermal Resistance (Rth(j-sp)) | 65 K/W - governs thermal coupling efficiency to PCB copper for reliability under sustained load |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead surface-mount plastic package with 2 terminals, 1.25 mm × 0.85 mm body size, 0.65 mm height, and cathode band marking on terminal 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Marked end of diode; connects to regulated output node in shunt configuration |
| 2 | Anode (A) | Ground or low-potential reference point; completes reverse-bias path for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables tighter regulation than ±2 % series where cost and stability trade-offs favor wider tolerance |
| Ultra-compact SOD523 footprint | Reduces board space by >50 % vs. SOD323, supporting miniaturized portable and wearables designs |
| Low 65 K/W junction-to-solder-point thermal resistance | Improves heat transfer to PCB copper, allowing higher sustained power in constrained thermal environments |
| 40 W non-repetitive peak power capability | Provides robust transient immunity against ESD and line surges without external TVS supplementation |
| 0.05 µA max reverse leakage at 80 % VZ | Minimizes parasitic current drain in always-on sensor nodes and energy-harvesting applications |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
|
Use Scenario: Stabilizing feedback voltage in low-current linear regulators or op-amp reference circuits. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 36 V reference point for error amplifier input. Use Value: Maintains ±5 % regulation accuracy across −40 °C to +85 °C ambient, reducing need for trimming components. |
Use Scenario: Protecting downstream analog inputs from transient overvoltage events exceeding 36 V. IC Role / Device Role / Timing Role: Passive clamping element diverting excess current to ground during voltage spikes. Use Value: Absorbs up to 40 W for 100 µs without degradation, eliminating requirement for larger discrete TVS devices. |
| Portable Device Voltage Monitor | Industrial Sensor Biasing |
|
Use Scenario: Monitoring battery pack voltage in handheld medical instruments with 36 V nominal supply rails. IC Role / Device Role / Timing Role: Precision Zener element in resistive divider network feeding ADC input. Use Value: Delivers <0.1 % full-scale error contribution due to 80 Ω rdiff and low leakage, improving measurement fidelity. |
Use Scenario: Providing stable bias voltage for analog front-end circuitry in 4–20 mA loop-powered sensors. IC Role / Device Role / Timing Role: Low-drift voltage reference establishing excitation level for bridge transducers. Use Value: +33.0 mV/K tempco allows predictable compensation in firmware, avoiding costly external temperature sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-B36 | ±2 % tolerance, 35.3 V–36.7 V range at IZ = 2 mA; lower rdiff (60 Ω typ.) | Higher precision required in metrology-grade references where 0.5 % absolute error is unacceptable | Select when tighter regulation outweighs cost premium and thermal derating margin is available |
| MMBZ5227BS | 36 V nominal, SOT-323 package, 200 mW Ptot, 30 W PZSM, 100 Ω rdiff | Legacy design refresh where existing SOT-323 land pattern must be retained | Choose only if board rework is prohibited; accepts 33 % lower surge rating and 25 % higher impedance |
Compared with BZX585-B36, the C36F trades 0.5 % tolerance for lower cost and broader thermal margin; versus MMBZ5227BS, it delivers 33 % higher surge capacity and 20 % lower dynamic impedance in a 25 % smaller footprint.
Availability
BZX585-C36F is available at Aetrix Electronics and suitable for portable medical instrumentation, industrial 4–20 mA sensor modules, and battery-backed memory retention circuits requiring stable component supply with guaranteed long-term sourcing.
Supply support for BZX585-C36F 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 specializing in high-volume, high-reliability discrete and logic devices, headquartered in Nijmegen, Netherlands.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered for compact, cost-effective voltage regulation and transient protection in consumer, industrial, and computing applications.
FAQ
What is the maximum continuous reverse current this diode can handle at 25 °C ambient?
The BZX585-C36F has a maximum forward current rating of 200 mA, but its continuous reverse (Zener) current is limited by power dissipation. At 25 °C ambient on FR4 with 35 mm² copper, 300 mW / 36 V ≈ 8.3 mA is the practical upper limit for sustained Zener conduction without exceeding thermal limits.
Does the cathode band correspond to Pin 1 in the SOD523 package outline?
Yes - the cathode band on the BZX585-C36F package aligns with Pin 1 as shown in Figure 11 of the datasheet. This marking matches the pinning table specifying Pin 1 as cathode (K), and must be oriented toward the regulated output node in shunt regulator configurations.
Can this Zener diode be used in parallel for higher power handling?
No - Zener diodes exhibit manufacturing variations in breakdown voltage, causing current hogging when paralleled. Even matched units risk thermal runaway due to positive tempco; external ballast resistors or dedicated high-power regulators are required instead.
What is the typical Zener impedance at 1 mA operating current?
At IZ = 1 mA, the BZX585-C36F exhibits a typical differential resistance of 90 Ω (per Table 9), which defines its small-signal AC impedance and directly impacts regulation stiffness under varying load conditions.
BZX585-C36F 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):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- -
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 25.2 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-C36F FAQ
1.How can I place an order for BZX585-C36F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-C36F 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-C36F reliable?
The price and inventory of BZX585-C36F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-C36F is usually 5 days.
3.What payment methods are accepted for BZX585-C36F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-C36F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-C36F?
BZX585-C36F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-C36F 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-C36F?
For technical support, including BZX585-C36F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-C36F requirements.
6.How does Aetrix verify that BZX585-C36F is sourced from the original manufacturer or authorized distributors?
All BZX585-C36F 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-C36F meets industry standards.
7.What is the process for return or replacement of BZX585-C36F?
All BZX585-C36F units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-C36F, 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-C36F part is unused and in its original packaging.
Return procedure for BZX585-C36F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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