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Diodes Incorporated AZ23C33-7
- Part No.:
- AZ23C33-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Zener Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AZ23C33-7.pdf
- Description:
- DIODE ZENER ARRAY 33V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,634
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Product details
Overview
AZ23C33-7 from Diodes Incorporated is a dual 33V Zener diode in common-anode SOT23 package, rated for 300mW total power dissipation, with ±5% matching between zener voltages (31–35V), 80Ω typical zener impedance at 5mA, and temperature coefficient of +0.090%/°C - used for precision voltage reference and overvoltage clamping in DC power rails.
For engineers reviewing the AZ23C33-7 datasheet, AZ23C33-7 pinout, AZ23C33-7 application, or AZ23C33-7 equivalent, key selection criteria include matched dual-zener tolerance, thermal resistance (417°C/W), JEDEC-qualified reliability, SOT23 footprint compatibility, and automotive-grade availability (Q-suffix variant).
Technical Context
This dual Zener operates in common-anode configuration: both cathodes are electrically isolated, enabling independent regulation or differential clamping. It supports bidirectional transient suppression when paired with external components and maintains stable breakdown under pulsed 5mA test current per diode.
Thermal derating begins at 25°C ambient, with full 300mW dissipation only at TA ≤ 25°C; junction-to-ambient thermal resistance is 417°C/W on FR-4 PCB with recommended pad layout. Operating temperature range spans –65°C to +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 31–35 V (min–max at IZT = 5 mA; enables precise 33 V nominal regulation with tight matching) |
| Power Dissipation | 300 mW total (limits continuous clamp energy in compact SOT23; requires thermal-aware PCB layout) |
| Zener Impedance | 80 Ω typical at 5 mA (determines output impedance and regulation stiffness under load variation) |
| Temperature Coefficient | +0.090 %/°C (positive drift ensures predictable voltage rise with temperature in bias networks) |
| Reverse Leakage | <0.1 µA at 25 V (ensures minimal quiescent current in high-impedance reference paths) |
| Package | SOT23 (standardized 3-pin surface-mount footprint compatible with automated assembly and reflow) |
| ESD Rating | HBM 8 kV, IEC 61000-4-2 contact 8 kV (supports robust handling in non-cleanroom manufacturing environments) |
Pinout & Package
Package: SOT23 - molded green plastic, UL 94V-0 rated, matte tin-plated terminals, 0.008 g weight, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode (common) | Shared anode connection for both Zener diodes; ties to system ground or negative rail |
| Pin 2 | Cathode 1 | First Zener cathode; connects to 33 V regulated node or clamping point |
| Pin 3 | Cathode 2 | Second Zener cathode; enables dual-rail referencing or redundancy without extra component |
Key Features
| Feature | Design Value |
|---|---|
| Dual Zeners, Common Anode | Enables space-efficient dual-voltage referencing or symmetric clamping from single footprint |
| ≤5% ΔVZ Matching | Ensures consistent regulation across both diodes - critical for differential sensing or matched biasing |
| JEDEC-Qualified Reliability | Validated to AEC-Q101 stress standards (HBM 8 kV, MM 400 V) for industrial and automotive use |
| Lead-Free & Halogen-Free | Complies with RoHS 3 (2015/863/EU) and Diodes' "Green" definition (<900 ppm Br/Cl, <1000 ppm Sb) |
| Automated Insertion Ready | SOT23 geometry and terminal finish meet MIL-STD-202 solderability requirements for high-yield placement |
Applications
| Industrial Power Monitoring | Automotive ECU Reference |
|---|---|
Use Scenario: Monitoring 24 V supply rail in PLC I/O modules with dual ADC inputs requiring matched reference stability. IC Role / Device Role / Timing Role: Dual Zener provides matched 33 V reference for two independent 12-bit SAR ADCs, minimizing inter-channel offset drift. Use Value: ≤5% VZ matching reduces calibration burden; SOT23 footprint saves board area versus discrete dual-Zener solution. |
Use Scenario: Providing stable bias voltage for CAN transceiver LDO input stage in engine control units operating at –40°C to +125°C. IC Role / Device Role / Timing Role: Common-anode dual Zener supplies regulated 33 V to LDO enable circuitry while rejecting battery transients. Use Value: +0.090%/°C TC compensates for LDO's own thermal drift; AEC-Q101 qualification ensures field reliability. |
| Telecom Line Card Protection | Medical Sensor Biasing |
Use Scenario: Clamping surge-induced overvoltage on 48 V PoE-powered line card backplane traces during lightning-induced transients. IC Role / Device Role / Timing Role: Dual Zener acts as fast-acting shunt clamp on primary and secondary rails simultaneously. Use Value: 300 mW rating supports short-duration surges; common-anode topology simplifies PCB routing and grounding. |
Use Scenario: Generating matched bias voltages for dual-channel photodiode transimpedance amplifiers in portable blood oximeters. IC Role / Device Role / Timing Role: Provides low-drift, low-noise 33 V reference for op-amp feedback networks in analog front-end. Use Value: 80 Ω zener impedance minimizes noise coupling into high-gain TIA stages; RoHS/Green compliance meets medical device regulations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C33-7-F | Single 33 V Zener in SOT23; no dual-element or matching spec | Requires two devices for dual-rail use; no guaranteed VZ tracking | Select when only one regulated node is needed and board area allows duplication |
| DZ23C33-7-F | Common-cathode dual Zener (vs. AZ23C33-7's common-anode); same VZ, PD, and package | Inverts polarity logic: cathodes tied together instead of anodes; affects PCB net topology | Choose when system ground-referenced clamping is preferred over negative-rail referenced design |
Compared with BZX84-C33-7-F and DZ23C33-7-F, AZ23C33-7 uniquely delivers matched dual 33 V regulation from a common-anode topology - reducing component count and improving channel-to-channel consistency in reference and protection circuits.
Availability
AZ23C33-7 is available at Aetrix Electronics and suitable for industrial power monitoring, automotive ECU reference, and telecom line card protection requiring stable component supply, JEDEC-qualified reliability, and RoHS-compliant packaging.
Supply support for AZ23C33-7 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 North America.
AZ23C33-7 belongs to the AZ23 series of dual Zener diodes engineered for high-reliability voltage reference and transient suppression in space-constrained, thermally demanding applications - especially where matched performance and automotive qualification matter.
FAQ
What is the maximum continuous reverse current for AZ23C33-7 before thermal runaway?
At 25°C ambient, the device sustains up to 9.1 mA continuous reverse current (300 mW ÷ 33 V) without exceeding its 300 mW rating. Derating applies above 25°C per Fig. 1: at 85°C ambient, max current drops to ~4.3 mA. Exceeding this risks junction overheating due to 417°C/W thermal resistance.
Can AZ23C33-7 be used as a single 33 V Zener by leaving one cathode unconnected?
Yes - Pin 2 or Pin 3 may be left floating with no reliability impact. The unused diode exhibits <0.1 µA leakage at 25 V, introducing negligible error in most reference applications. However, PCB layout should avoid floating pins near noisy traces to prevent capacitive coupling.
Does AZ23C33-7 meet AEC-Q200 for passive components?
No - AZ23C33-7 is qualified to AEC-Q101 (for discrete semiconductors), not AEC-Q200 (for passive components). Its automotive-grade variant is AZ23C33Q-7-F, which adds PPAP documentation, IATF 16949 manufacturing, and extended temperature validation per AEC-Q101 Rev H.
How does the +0.090%/°C temperature coefficient affect accuracy over –40°C to +125°C?
Over that 165°C span, voltage drift totals +14.85% (165 × 0.090%), or ~4.9 V shift from 33 V nominal. In practice, actual drift is linear only near 25°C; datasheet Fig. 2 shows <±2% deviation across –40°C to +125°C due to curvature compensation in the Zener structure.
AZ23C33-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Configuration:
- 1 Pair Common Anode
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AZ23C33-7 FAQ
1.How can I place an order for AZ23C33-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ23C33-7 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 AZ23C33-7 reliable?
The price and inventory of AZ23C33-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ23C33-7 is usually 5 days.
3.What payment methods are accepted for AZ23C33-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ23C33-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ23C33-7?
AZ23C33-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ23C33-7 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 AZ23C33-7?
For technical support, including AZ23C33-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ23C33-7 requirements.
6.How does Aetrix verify that AZ23C33-7 is sourced from the original manufacturer or authorized distributors?
All AZ23C33-7 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 AZ23C33-7 meets industry standards.
7.What is the process for return or replacement of AZ23C33-7?
All AZ23C33-7 units undergo pre-shipment inspection (PSI). If there is an issue with AZ23C33-7, 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 AZ23C33-7 part is unused and in its original packaging.
Return procedure for AZ23C33-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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