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Diodes Incorporated BZT52C33S-7
- Part No.:
- BZT52C33S-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZT52C33S-7.pdf
- Description:
- DIODE ZENER 33V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:9,347
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Product details
Overview
BZT52C33S-7 from Diodes Incorporated is a surface-mount Zener diode with nominal zener voltage 33 V, 2 mA test current, 325 Ω maximum zener impedance at 2 mA, 0.1 µA maximum reverse leakage at 27.4 V, and ±5% voltage tolerance. It operates within −65 °C to +150 °C and delivers precise voltage regulation in low-power reference and protection circuits.
For engineers reviewing the BZT52C33S-7 datasheet, BZT52C33S-7 pinout, BZT52C33S-7 application, or BZT52C33S-7 equivalent, key selection criteria include zener voltage accuracy, thermal stability, SOD323 package compatibility with high-density PCB layouts, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode functions as a two-terminal voltage reference and overvoltage clamp, operating in reverse breakdown mode with a specified 33 V nominal regulation point. Its planar die construction ensures stable breakdown characteristics across temperature, and its −65 °C to +150 °C operating range supports deployment in under-hood automotive and industrial control environments.
The device exhibits a positive temperature coefficient of +23.1 mV/°C above 6 V, enabling predictable drift compensation in precision analog circuits. With 200 mW power dissipation and 625 °C/W junction-to-ambient thermal resistance on FR-4, it requires minimal board area while maintaining safe thermal margins at rated current.
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 stable regulation window for supply rail clamping |
| Power Dissipation (PD) | 200 mW - limits continuous dissipation without heatsinking on standard FR-4 PCB |
| Zener Impedance (ZZT) | 325 Ω max at 2 mA - determines AC ripple rejection and regulation stiffness under dynamic load |
| Reverse Leakage (IR) | 0.1 µA max at VR = 27.4 V - ensures minimal standby current in battery-powered sensing nodes |
| Operating Temperature | −65 °C to +150 °C - enables use in engine control units and industrial motor drives |
| Package | SOD323 - 1.3 mm × 1.7 mm footprint, compatible with automated pick-and-place and reflow |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress-test requirements including HTGB, HTRB, and TCT |
Pinout & Package
Package: SOD323 - surface-mount plastic case with cathode band marking; dimensions: 1.30 mm (D) × 1.70 mm (E) × 0.30 mm (L); weight ≈ 0.0049 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in reverse-bias configuration; forms reference ground return path |
| Cathode | Zener breakdown terminal / voltage regulation output | Connected to regulated node; cathode band identifies polarity during placement and inspection |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures repeatable breakdown voltage and low parameter drift over lifetime and temperature |
| AEC-Q101 qualification | Validates reliability for automotive applications including powertrain and body electronics |
| Lead-free & halogen-free | Complies with RoHS 2 and JEDEC J-STD-020 Level 1 moisture sensitivity for zero bake requirement |
| SOD323 package | Enables high-density layout with 0.59 mm pad pitch and compatibility with 0201-class assembly equipment |
Applications
| Automotive ECU Power Rail Clamp | Industrial Sensor Reference Voltage |
|---|---|
Use Scenario: Clamping transient spikes on 3.3 V or 5 V microcontroller supply rails in engine control modules. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator and overvoltage protector in parallel with LDO output. Use Value: Limits voltage excursions to ≤35 V during load-dump events, preserving MCU integrity without adding active circuitry. |
Use Scenario: Providing stable 33 V reference for analog front-end calibration in pressure transducers. IC Role / Device Role / Timing Role: Passive voltage reference source for ADC biasing and sensor excitation circuits. Use Value: Delivers ±5% regulation accuracy and <0.1 µA leakage, minimizing offset error and battery drain in wireless sensor nodes. |
| USB Port Overvoltage Protection | Programmable Logic Controller Input Conditioning |
Use Scenario: Protecting USB 2.0 data line receivers from ESD-induced voltage overshoot beyond 3.6 V. IC Role / Device Role / Timing Role: Low-capacitance (<2 pF) Zener clamp placed between D+ and ground. Use Value: Responds within nanoseconds to clamp transients to 35 V while preserving signal integrity up to 480 Mbps. |
Use Scenario: Level-shifting and surge suppression for 24 V DC digital inputs in PLC backplanes. IC Role / Device Role / Timing Role: Zener-based input protection network combined with series resistor and TVS. Use Value: Absorbs repetitive 1 kV/µs surges per IEC 61000-4-4 while maintaining <1 µA off-state current at 24 V nominal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5265BS-7-F | Zener voltage 33 V, but 350 Ω max ZZT at 1 mA; SOT-23 package (larger footprint) | Higher impedance reduces regulation precision; SOT-23 requires more board area than SOD323 | Select when legacy SOT-23 footprint compatibility is required over density or low-Z performance |
| BZX84-C33-7 | 33 V nominal, 300 Ω max ZZT at 5 mA; same SOD323 package but ±6% tolerance vs. ±5% | Looser voltage tolerance increases calibration uncertainty in precision references | Prefer for cost-sensitive non-critical clamping where ±6% variation is acceptable |
Compared with MMBZ5265BS-7-F and BZX84-C33-7, BZT52C33S-7 offers tighter voltage tolerance, lower zener impedance at its specified test current, and optimal fit for space-constrained automotive PCBs requiring AEC-Q101 validation.
Availability
BZT52C33S-7 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor calibration, USB interface protection, and PLC input conditioning requiring stable component supply and full traceability.
Supply support for BZT52C33S-7 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
The BZT52C series belongs to Diodes' high-reliability Zener diode product line, engineered specifically for voltage regulation and transient suppression in automotive, industrial, and consumer electronics where compact size and AEC-Q101 compliance are critical.
FAQ
What is the maximum power dissipation for BZT52C33S-7 at 70°C ambient?
At 70°C ambient, derated power dissipation is 150 mW, calculated using the 625 °C/W thermal resistance and linear derating curve from the datasheet. This assumes mounting on FR-4 with recommended pad layout per Diodes' package outline documentation.
Is BZT52C33S-7 suitable for bidirectional ESD protection?
No - BZT52C33S-7 is a unidirectional Zener diode optimized for reverse-bias regulation. For bidirectional ESD protection, dedicated TVS diodes such as D3V3M1U2S-7-F (3.3 V, ±5 V breakdown) are required.
Does the SOD323 package support hand-soldering for prototyping?
Yes - the SOD323 package is compatible with fine-tip soldering irons and hot-air rework stations. Recommended preheat to 100°C, peak temperature ≤260°C for ≤10 seconds, and use of flux-compatible solder paste for reliable joint formation.
How does the temperature coefficient affect regulation accuracy over −40°C to +125°C?
With a +23.1 mV/°C coefficient, BZT52C33S-7 exhibits ~1.9 V total drift across that range - approximately ±2.9% of nominal voltage. System-level compensation or trimming is advised for applications demanding <±1% regulation stability.
BZT52C33S-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±6%
- Power - Max:
- 200 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-323
BZT52C33S-7 FAQ
1.How can I place an order for BZT52C33S-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C33S-7 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 BZT52C33S-7 reliable?
The price and inventory of BZT52C33S-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C33S-7 is usually 5 days.
3.What payment methods are accepted for BZT52C33S-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C33S-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C33S-7?
BZT52C33S-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C33S-7 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 BZT52C33S-7?
For technical support, including BZT52C33S-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C33S-7 requirements.
6.How does Aetrix verify that BZT52C33S-7 is sourced from the original manufacturer or authorized distributors?
All BZT52C33S-7 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 BZT52C33S-7 meets industry standards.
7.What is the process for return or replacement of BZT52C33S-7?
All BZT52C33S-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C33S-7, 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 BZT52C33S-7 part is unused and in its original packaging.
Return procedure for BZT52C33S-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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