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Taiwan Semiconductor Corporation BZD17C33PH
- Part No.:
- BZD17C33PH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZD17C33PH.pdf
- Description:
- DIODE ZENER 33V 1W SUB SMA
- Quantity:
- Payment:
- Shipping:
Inventory:8,691
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Product details
Overview
BZD17C33PH from Taiwan Semiconductor is a single-die, AEC-Q101-qualified silicon Zener diode in Sub SMA package, with nominal Zener voltage 33 V (min 31 V, max 35 V), 8 Ω typical dynamic resistance, ±0.06 %/°C temperature coefficient, 25 mA test current, and 0.8 W steady-state power dissipation. It serves as precision voltage reference and overvoltage clamp in automotive power supply rails.
For engineers reviewing the BZD17C33PH datasheet, BZD17C33PH pinout, BZD17C33PH application, or BZD17C33PH equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (RθJA = 180 °C/W), surge capability (300 W, 100 μs), moisture sensitivity level (MSL 1), and RoHS/halogen-free compliance for automotive-grade PCB assembly.
Technical Context
The BZD17C33PH operates as a two-terminal voltage-regulating device relying on controlled reverse-breakdown conduction. Its Zener voltage is stabilized by heavily doped p-n junction design, with low leakage current (<1.0 μA @ 24 V) and tight VZ tolerance (±3.0 % at 25 °C).
Thermal performance is defined for mounting on 5 mm × 5 mm copper pad: RθJL = 30 °C/W enables efficient heat transfer to PCB, while RθJA = 180 °C/W reflects ambient-limited dissipation under standard conditions. Junction temperature range spans −55 °C to +175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 31–35 V - defines stable regulation window under 25 mA test current |
| Dynamic Resistance rdiff | 8 Ω typ - determines output impedance and load regulation error |
| Temp. Coefficient αZ | ±0.06 %/°C - ensures <±0.2 V drift over −40 °C to +125 °C operating range |
| Power Dissipation Ptot | 0.8 W @ TA = 25 °C - sets maximum continuous DC power on standard PCB pad |
| Surge Power PZSM | 300 W @ 100 μs - supports transient overvoltage suppression per ISO 7637-2 Pulse 1/2a |
| Junction Temp. Range | −55 °C to +175 °C - enables use in under-hood automotive environments |
| Moisture Sensitivity | Level 1 (J-STD-020) - allows unlimited floor life; no bake required before reflow |
Pinout & Package
Sub SMA package: surface-mount, low-profile (max height 2.3 mm), cathode indicated by band, matte tin-plated leads, UL 94V-0 molding compound, weight ≈ 0.019 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse breakdown reference node | Connected to lower-potential rail; establishes polarity for clamping or biasing |
| Cathode | Forward current exit / Zener voltage reference node | Marked by band; connected to regulated or protected node; defines VZ relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics per stress test requirements (HTOL, TC, HAST, etc.) |
| Low leakage current | <1.0 μA @ 24 V reverse - minimizes standby power loss in battery-critical systems |
| Stable Zener voltage | ±3.0 % tolerance and ±0.06 %/°C TC - reduces need for post-calibration in reference circuits |
| High surge robustness | 300 W non-repetitive pulse rating - withstands load dump transients without degradation |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive - meets Tier-1 automotive material declarations |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Input Protection |
|---|---|
Use Scenario: Clamping 12 V sensor supply against ISO 7637-2 Pulse 1 (−150 V) and Pulse 2a (+100 V) transients. IC Role / Device Role / Timing Role: Two-terminal voltage clamp protecting downstream LDOs and microcontroller I/O. Use Value: Prevents latch-up or damage during cold-crank and load-dump events without adding active circuitry. | Use Scenario: Stabilizing 24 V fieldbus interface reference voltage in harsh factory environments. IC Role / Device Role / Timing Role: Precision shunt reference providing stable bias for analog front-end comparators. Use Value: Maintains <±0.5 % accuracy across −40 °C to +85 °C, eliminating recalibration cycles. |
| DC-DC Converter Feedback Network | Medical Equipment Power Sequencing |
Use Scenario: Setting output voltage of isolated flyback converter via optocoupler feedback loop. IC Role / Device Role / Timing Role: Zener reference in secondary-side error amplifier circuit. Use Value: Enables ±1 % output regulation with minimal component count and no external trimming. | Use Scenario: Providing clean, stable 3.3 V auxiliary rail for FPGA configuration during power-up sequencing. IC Role / Device Role / Timing Role: Low-noise voltage reference for power-good monitoring circuit. Use Value: Ensures reliable boot sequence initiation with <100 ns response to overvoltage faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics BZT52-C33S | Same 33 V nominal VZ, but SOD-323 package (smaller footprint, higher RθJA = 350 °C/W) | Limited to lower-power applications due to 0.3 W Ptot; unsuitable for automotive surge clamping | Select when board space is critical and thermal budget permits reduced derating |
| Vishay PLZ33B | 33 V VZ, 1.3 W Ptot, DO-214AC package; higher surge rating (400 W) | Requires larger PCB area; not AEC-Q101 qualified; intended for industrial, not automotive use | Select when higher continuous power or surge margin is needed and automotive qualification is not required |
Compared with BZD17C33PH, BZT52-C33S trades thermal robustness for miniaturization, while PLZ33B offers higher power handling at the cost of automotive qualification and larger footprint-making BZD17C33PH optimal for space-constrained, thermally demanding automotive modules.
Availability
BZD17C33PH is available at Aetrix Electronics and suitable for automotive ECU designs, industrial PLC input stages, and medical auxiliary power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for BZD17C33PH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.
The BZD17C series is part of TSC's AEC-Q101-qualified Zener portfolio, engineered specifically for high-reliability voltage regulation and transient protection in automotive power systems and harsh-environment industrial controls.
FAQ
What is the Zener voltage tolerance of BZD17C33PH at 25 °C?
The BZD17C33PH has a Zener voltage range of 31 V to 35 V at IZT = 25 mA and TA = 25 °C, corresponding to ±3.0 % tolerance around the nominal 33 V rating. This tolerance is verified per the manufacturer's electrical specifications table and applies to all units within the production lot.
Is BZD17C33PH suitable for automotive applications?
Yes, BZD17C33PH is AEC-Q101 qualified and rated for junction temperatures from −55 °C to +175 °C. Its Sub SMA package, MSL Level 1 rating, and 300 W surge capability meet requirements for engine control, body electronics, and ADAS power domains where reliability under thermal and electrical stress is critical.
What is the maximum reverse leakage current for BZD17C33PH?
The maximum reverse leakage current for BZD17C33PH is 1.0 μA at VR = 24 V and TA = 25 °C. This value is specified in the Electrical Specifications table and ensures minimal standby current draw in always-on automotive subsystems.
Does BZD17C33PH require special handling during reflow soldering?
No special handling is required: BZD17C33PH has Moisture Sensitivity Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30 °C/60 % RH without baking prior to reflow. Standard lead-free reflow profiles compatible with Sub SMA packages apply.
How does the thermal resistance of BZD17C33PH affect its power derating?
With RθJA = 180 °C/W (on 5 mm × 5 mm Cu pad), BZD17C33PH derates linearly above 25 °C ambient: usable power drops by ~4.4 mW/°C. At 85 °C ambient, maximum continuous dissipation falls to ~0.53 W-critical for thermal design in sealed enclosures.
BZD17C33PH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 24 V
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 200 mA
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Sub SMA
BZD17C33PH FAQ
1.How can I place an order for BZD17C33PH through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD17C33PH 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 BZD17C33PH reliable?
The price and inventory of BZD17C33PH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZD17C33PH is usually 5 days.
3.What payment methods are accepted for BZD17C33PH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD17C33PH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD17C33PH?
BZD17C33PH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD17C33PH 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 BZD17C33PH?
For technical support, including BZD17C33PH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD17C33PH requirements.
6.How does Aetrix verify that BZD17C33PH is sourced from the original manufacturer or authorized distributors?
All BZD17C33PH 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 BZD17C33PH meets industry standards.
7.What is the process for return or replacement of BZD17C33PH?
All BZD17C33PH units undergo pre-shipment inspection (PSI). If there is an issue with BZD17C33PH, 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 BZD17C33PH part is unused and in its original packaging.
Return procedure for BZD17C33PH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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