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Diodes Incorporated BZT52C33-13-F
- Part No.:
- BZT52C33-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C33-13-F.pdf
- Description:
- DIODE ZENER 33V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:4,022
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Product details
Overview
BZT52C33-13-F from Diodes Incorporated is a surface-mount 33 V, ±5% tolerance Zener diode in SOD123 package, rated for 500 mW power dissipation at TL = +75°C and 370 mW at TA = +25°C, with 80 Ω maximum Zener impedance at 2 mA test current, used for precision voltage regulation and overvoltage protection in DC power rails and sensor biasing circuits.
For engineers reviewing the BZT52C33-13-F datasheet, BZT52C33-13-F pinout, BZT52C33-13-F application, or BZT52C33-13-F equivalent, key selection criteria include Zener voltage accuracy (31.0–35.0 V), low leakage (<0.1 µA at 24.8 V), thermal resistance (RθJA = 338 °C/W), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its planar die construction ensures consistent breakdown characteristics and low dynamic impedance across the 2–51 V family.
Designed for medium-current general-purpose regulation, it delivers 33 V nominal regulation at 2 mA test current with ±5% tolerance, −2 mV/°C temperature coefficient, and <0.1 µA reverse leakage at VR = 24.8 V - enabling predictable clamping in low-power analog and digital supply monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V nominal, 31.0–35.0 V range at IZT = 2 mA - defines precise clamping threshold for 3.3 V–5 V logic rail protection |
| Power Dissipation (PD) | 370 mW at TA = +25°C - supports continuous operation in compact PCB layouts without forced cooling |
| Zener Impedance (ZZT) | 80 Ω max at f = 1 kHz, IZT = 2 mA - ensures minimal voltage deviation under dynamic load transients |
| Reverse Leakage (IR) | 0.1 µA max at VR = 24.8 V - guarantees negligible quiescent current draw in battery-powered sensing nodes |
| Temperature Coefficient | −2 mV/°C - enables predictable drift compensation in temperature-stable reference designs |
| Package | SOD123 - 2.65 mm × 1.55 mm footprint compatible with high-speed pick-and-place and reflow soldering |
Pinout & Package
Two-terminal device in SOD123 plastic package with cathode band marking; anode and cathode terminals are unidirectional, polarity-critical for proper reverse-bias operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system GND or lower-potential rail; establishes forward conduction path during fault conditions |
| Cathode | Regulated output node | Connected to protected circuit node; maintains 33 V clamp when reverse voltage exceeds breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and body electronics requiring high-reliability voltage clamping |
| Lead-free & RoHS compliant | Fully compliant with EU Directive 2011/65/EU and halogen/antimony-free "Green" specification (<900 ppm Br+Cl, <1000 ppm Sb) |
| Low moisture sensitivity | MSL Level 1 per J-STD-020 - no baking required before reflow, reducing manufacturing overhead |
| Matte tin-plated terminals | Solderable per MIL-STD-202, Method 208 - ensures robust intermetallic formation and long-term joint integrity |
Applications
| Industrial Sensor Signal Conditioning | Automotive ECU Power Rail Protection |
|---|---|
Use Scenario: Stabilizing reference voltage for 4–20 mA transmitter front-end circuitry exposed to 24 V supply fluctuations. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator to clamp input to ADC driver stage at precisely 33 V. Use Value: Maintains ±0.5% reference stability across −40°C to +125°C ambient, preventing ADC saturation during load dump events. |
Use Scenario: Overvoltage suppression on 12 V battery-fed microcontroller supply line in body control module. IC Role / Device Role / Timing Role: Clamping transient spikes above 33 V to protect 3.3 V LDO input and internal logic. Use Value: Absorbs 370 mW peak energy without degradation, meeting ISO 7637-2 Pulse 1/2/5a immunity requirements. |
| Consumer IoT Battery Monitoring | Medical Portable Device Biasing |
Use Scenario: Providing stable bias for lithium-ion cell voltage divider network in smart battery pack. IC Role / Device Role / Timing Role: Precision voltage reference for analog front-end comparator detecting overcharge condition. Use Value: Delivers <0.1 µA leakage at 24.8 V reverse bias, extending standby time by >12 months on coin-cell power. |
Use Scenario: Regulating excitation voltage for piezoresistive pressure sensor in handheld diagnostic tool. IC Role / Device Role / Timing Role: Low-drift Zener source ensuring <±0.1% full-scale accuracy in analog signal chain. Use Value: −2 mV/°C TC enables software-compensated calibration over 0–50°C operating range without external thermistor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5265BLT1G | 33 V, ±5%, 200 mW PD, SOT-23 package, 100 Ω ZZT @ 20 mA | Lower power rating and higher impedance limit use to low-current biasing only | Select when board space is constrained and load current ≤1 mA |
| BZX84-C33 | 33 V, ±5%, 300 mW PD, SOT-23 package, 80 Ω ZZT @ 5 mA | Higher test current (5 mA) shifts operating point; not drop-in for 2 mA designs | Prefer where existing SOT-23 footprint reuse is required and thermal margin allows |
Compared with MMBZ5265BLT1G and BZX84-C33, BZT52C33-13-F offers 24% higher power handling and identical Zener impedance at lower test current - making it optimal for sustained 2–5 mA regulation in thermally limited automotive and industrial PCBs.
Availability
BZT52C33-13-F is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive ECUs, consumer IoT battery management, and medical portable diagnostics requiring stable component supply with AEC-Q101 assurance and full RoHS compliance.
Supply support for BZT52C33-13-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets since 1959.
The BZT52 series belongs to Diodes' general-purpose Zener diode product line, engineered for cost-effective, high-volume voltage regulation and transient suppression in space-constrained surface-mount applications.
FAQ
What is the maximum reverse voltage (VR) at which BZT52C33-13-F guarantees IR ≤ 0.1 µA?
The datasheet specifies IR ≤ 0.1 µA at VR = 24.8 V - this is the maximum reverse voltage below the 33 V Zener breakdown where leakage remains within that limit. Exceeding 24.8 V increases leakage exponentially until reaching the 31.0 V minimum breakdown threshold.
Can BZT52C33-13-F be used in place of a 30 V Zener diode for overvoltage protection?
No - its 33 V nominal Zener voltage and 31.0–35.0 V tolerance range make it unsuitable as a direct replacement for a 30 V part. Using it would raise the clamping threshold by ≥1 V, potentially exposing downstream circuitry to damaging overvoltage during transients.
Is the SOD123 package of BZT52C33-13-F compatible with standard reflow profiles for lead-free soldering?
Yes - the device is qualified for Pb-free reflow per JEDEC J-STD-020, with MSL Level 1 rating. It withstands peak temperatures up to 260°C for ≤60 seconds and ramp rates ≤3°C/s, matching IPC/JEDEC Class 3 profiles for high-reliability assembly.
Does BZT52C33-13-F have a specified capacitance value relevant for high-frequency noise suppression?
No - the datasheet does not list junction capacitance (CJ) for the BZT52C33 variant. While Fig. 5 shows typical CJ ≈ 15–20 pF for 30–39 V parts at VR = 1 V, this is extrapolated data; Diodes does not guarantee or specify capacitance for BZT52C33-13-F in the official DS18004 document.
BZT52C33-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±6%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 23.1 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:
- SOD-123
BZT52C33-13-F FAQ
1.How can I place an order for BZT52C33-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C33-13-F 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 BZT52C33-13-F reliable?
The price and inventory of BZT52C33-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C33-13-F is usually 5 days.
3.What payment methods are accepted for BZT52C33-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C33-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C33-13-F?
BZT52C33-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C33-13-F 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 BZT52C33-13-F?
For technical support, including BZT52C33-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C33-13-F requirements.
6.How does Aetrix verify that BZT52C33-13-F is sourced from the original manufacturer or authorized distributors?
All BZT52C33-13-F 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 BZT52C33-13-F meets industry standards.
7.What is the process for return or replacement of BZT52C33-13-F?
All BZT52C33-13-F units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C33-13-F, 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 BZT52C33-13-F part is unused and in its original packaging.
Return procedure for BZT52C33-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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