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Toshiba Semiconductor and Storage CUHZ30V,H3F
- Part No.:
- CUHZ30V,H3F
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
CUHZ30V,H3F.pdf
- Description:
- 30 V ZENER DIODE, SOD-323HE
- Quantity:
- Payment:
- Shipping:
Inventory:5,399
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Product details
Overview
CUHZ30V,H3F from Toshiba Electronic Devices & Storage Corporation is a silicon epitaxial planar Zener diode designed for voltage regulation and transient overvoltage suppression in low-power signal lines. It delivers a nominal Zener voltage of 30 V (min 28.0 V, typ 30 V, max 32.0 V) at 10 mA test current, with dynamic resistance of 0.21 Ω, clamp voltage of 33.8 V at 26 A peak pulse current, and total capacitance of 125 pF at 0.1 V reverse bias - enabling precise clamping in USB, HDMI, and industrial I/O protection circuits.
For engineers reviewing the CUHZ30V,H3F datasheet, CUHZ30V,H3F pinout, CUHZ30V,H3F application, or CUHZ30V,H3F equivalent, key selection criteria include its 30 V Zener voltage tolerance, 2100 W peak pulse power per IEC61000-4-5, 26 A peak pulse current capability, US2H surface-mount package, and ESD robustness of ±30 kV per IEC61000-4-2.
Technical Context
The CUHZ30V,H3F operates as a bidirectional voltage-clamping device in reverse-biased configuration, leveraging silicon epitaxial planar junction technology for stable Zener breakdown and low dynamic impedance. Its design supports fast transient response with 8/20 μs pulse compliance and low capacitance to minimize signal distortion on high-speed interfaces.
It is rated for 150 °C junction temperature and features two distinct power dissipation ratings: 1200 mW on large copper pads (645 mm²) and 500 mW on standard 4 mm × 4 mm pads - reflecting thermal performance dependency on PCB layout. The device meets IEC61000-4-2 (ESD) and IEC61000-4-5 (surge) immunity standards without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 28.0–32.0 V (min–max at IZ = 10 mA); enables stable 30 V reference or clamping in 24 V system rails. |
| Dynamic Resistance (ZZ) | 0.21 Ω (typ at IZ = 10 mA); ensures tight voltage regulation under varying load conditions. |
| Clamp Voltage (VC) | 33.8 V (typ at IPP = 26 A); limits transient overshoot to safe levels for downstream 3.3 V/5 V logic. |
| Peak Pulse Power (PPK) | 2100 W (per IEC61000-4-5, 8/20 μs); sustains high-energy surges without failure in industrial environments. |
| Total Capacitance (Ct) | 125 pF (typ at VR = 0.1 V, f = 1 MHz); preserves signal integrity on data lines up to ~100 Mbps. |
| ESD Withstand (Contact) | ±30 kV (per IEC61000-4-2); eliminates need for additional ESD stages in front-end protection designs. |
Pinout & Package
CUHZ30V,H3F is housed in the US2H surface-mount package (2-pin, cathode-anode configuration), measuring 2.9 mm × 1.3 mm × 1.1 mm (L × W × H) with typical weight of 5.4 mg. The package uses standard JEDEC-compliant land pattern dimensions and is optimized for reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Marked side) | Cathode | Connected to higher-potential node during clamping; polarity must be observed to ensure correct surge shunting path. |
| 2 | Anode | Connected to ground or lower-potential reference; forms low-impedance discharge path for transients. |
Key Features
| Feature | Design Value |
|---|---|
| E24-series Zener voltage alignment | Ensures compatibility with standard resistor-divider networks and legacy reference designs without recalibration. |
| Low dynamic impedance (0.21 Ω) | Minimizes voltage deviation under fast-rising transients, improving clamping accuracy in real-world surge events. |
| US2H ultra-small package | Reduces PCB footprint by >40% vs. SOD-323, enabling dense routing in space-constrained USB-C or sensor interface layouts. |
| IEC61000-4-5 compliant (2100 W) | Meets Level 4 surge immunity for industrial Ethernet and fieldbus nodes without external series impedance. |
Applications
| USB 2.0 Data Line Protection | HDMI DDC Channel Clamping |
|---|---|
Use Scenario: Protecting differential USB 2.0 D+/D− lines against ESD and lightning-induced surges in portable docking stations. IC Role / Device Role: Bidirectional transient voltage suppressor placed directly at connector entry point. Use Value: 125 pF capacitance avoids signal rise-time degradation; ±30 kV ESD rating eliminates secondary TVS stages. |
Use Scenario: Safeguarding HDMI DDC (I²C) lines from hot-plug transients and cable discharge events in AV receivers. IC Role / Device Role: Low-capacitance Zener clamp between SDA/SCL and ground, operating below 5 V logic threshold. Use Value: 33.8 V clamp voltage prevents latch-up in upstream level shifters while maintaining <100 ns response. |
| Industrial Sensor Signal Conditioning | PLC Digital Input Protection |
Use Scenario: Shielding 4–20 mA current-loop analog inputs from induced surges in factory-floor wiring harnesses. IC Role / Device Role: Precision Zener reference and overvoltage limiter integrated into op-amp input stage. Use Value: 28–32 V Zener range aligns with 24 V supply rail derating; 0.21 Ω ZZ maintains loop accuracy within ±0.1%. |
Use Scenario: Hardening 24 V DC digital input channels against back-EMF and switching transients in motor control cabinets. IC Role / Device Role: Primary surge suppression element before optocoupler input, absorbing 2100 W pulses per IEC61000-4-5. Use Value: 26 A peak current rating handles worst-case inductive kick; US2H package allows placement within 2 mm of connector. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener-based transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF30A (ON Semiconductor) | Higher dynamic impedance (0.5 Ω), larger SOD-123FL package (3.7 × 1.7 mm), 30 V Zener tolerance ±5% (vs. CUHZ30V's E24-aligned ±6.7%). | Lower clamping ratio (VC/VZ ≈ 1.13 vs. 1.13), but higher 100 pF capacitance limits use in >50 Mbps interfaces. | Select when cost sensitivity outweighs board space constraints and signal speed requirements. |
| P6SMB33A (Littelfuse) | Higher power rating (600 W avg, 3.3 kW peak), DO-214AA package (4.5 × 3.5 mm), 33 V nominal Zener (not E24-aligned), 1.2 Ω ZZ. | Designed for bulk AC/DC input protection; unsuitable for high-speed data lines due to 200 pF capacitance and slower response. | Prefer for primary-side surge suppression in power supplies where size and speed are secondary to energy handling. |
Compared with SMF30A and P6SMB33A, CUHZ30V,H3F offers superior high-speed interface compatibility via its 125 pF capacitance and US2H footprint, tighter Zener tolerance alignment with E24 standards, and lowest dynamic impedance - making it optimal for precision clamping in compact, data-intensive systems.
Availability
CUHZ30V,H3F is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI DDC channel hardening, and industrial 24 V digital input conditioning requiring stable component supply, RoHS-compliant sourcing, and traceable lot-level documentation.
Supply support for CUHZ30V,H3F 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
Toshiba Electronic Devices & Storage Corporation is a global semiconductor manufacturer specializing in power devices, logic ICs, and discrete components, with core expertise in reliability engineering and automotive-grade qualification.
The CUHZ Series is part of Toshiba's transient voltage suppression portfolio, engineered specifically for high-density, high-speed interface protection in consumer, industrial, and automotive electronics where low capacitance and precise Zener voltage are critical.
FAQ
What is the Zener voltage tolerance of CUHZ30V,H3F?
The CUHZ30V,H3F has a Zener voltage range of 28.0 V (minimum) to 32.0 V (maximum) at 10 mA test current, with a typical value of 30 V. This ±6.7% tolerance aligns with the E24 resistor standard, facilitating predictable integration into existing voltage-reference and clamping circuits without recalibration.
Does CUHZ30V,H3F meet IEC61000-4-5 surge immunity standards?
Yes, CUHZ30V,H3F is rated for 2100 W peak pulse power per IEC61000-4-5 (8/20 μs waveform) at 25°C ambient. Its specified 26 A peak pulse current and 33.8 V clamp voltage ensure compliance with Level 4 surge immunity requirements for industrial equipment and communication interfaces.
What is the package type and mounting compatibility of CUHZ30V,H3F?
CUHZ30V,H3F uses the US2H surface-mount package - a 2-pin, cathode-marked, ultra-small outline measuring 2.9 mm × 1.3 mm × 1.1 mm. It is compatible with standard reflow soldering profiles and JEDEC-compliant land patterns, supporting automated assembly in high-volume production.
How does the dynamic impedance of CUHZ30V,H3F affect clamping performance?
The CUHZ30V,H3F exhibits a typical dynamic impedance of 0.21 Ω at 10 mA, which minimizes voltage deviation during transient events. This low ZZ ensures consistent clamping behavior across varying surge currents - critical for protecting sensitive 3.3 V or 5 V logic from overvoltage beyond the 33.8 V clamp threshold.
Is CUHZ30V,H3F suitable for high-speed data lines like USB or HDMI?
Yes, CUHZ30V,H3F is explicitly suited for high-speed data line protection: its 125 pF total capacitance at 0.1 V reverse bias introduces negligible signal distortion on USB 2.0 (480 Mbps) and HDMI DDC (100 kHz I²C) lines, and its ±30 kV ESD rating per IEC61000-4-2 eliminates need for cascaded protection stages.
CUHZ30V,H3F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Package/Case:
- 2-SMD, Flat Leads
- Series:
- CUHZ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 28V
- Voltage - Clamping (Max) @ Ipp:
- 33.8V (Typ)
- Current - Peak Pulse (10/1000µs):
- 26A (8/20µs)
- Power - Peak Pulse:
- 2100W (2.1kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 125pF @ 1MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- US2H
CUHZ30V,H3F FAQ
1.How can I place an order for CUHZ30V,H3F through Aetrix?
Please submit a Request for Quotation (RFQ) for CUHZ30V,H3F 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 CUHZ30V,H3F reliable?
The price and inventory of CUHZ30V,H3F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CUHZ30V,H3F is usually 5 days.
3.What payment methods are accepted for CUHZ30V,H3F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CUHZ30V,H3F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CUHZ30V,H3F?
CUHZ30V,H3F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CUHZ30V,H3F 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 CUHZ30V,H3F?
For technical support, including CUHZ30V,H3F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CUHZ30V,H3F requirements.
6.How does Aetrix verify that CUHZ30V,H3F is sourced from the original manufacturer or authorized distributors?
All CUHZ30V,H3F 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 CUHZ30V,H3F meets industry standards.
7.What is the process for return or replacement of CUHZ30V,H3F?
All CUHZ30V,H3F units undergo pre-shipment inspection (PSI). If there is an issue with CUHZ30V,H3F, 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 CUHZ30V,H3F part is unused and in its original packaging.
Return procedure for CUHZ30V,H3F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CUHZ30V,H3F Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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