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Toshiba Semiconductor and Storage CUHZ16V,H3F
- Part No.:
- CUHZ16V,H3F
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
CUHZ16V,H3F.pdf
- Description:
- 16 V ZENER DIODE, SOD-323HE
- Quantity:
- Payment:
- Shipping:
Inventory:8,623
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Product details
Overview
CUHZ16V from Toshiba Electronic Devices & Storage Corporation is a silicon epitaxial planar Zener diode designed for voltage regulation and transient overvoltage clamping in low-power signal lines. It delivers a nominal Zener voltage of 16 V (min 15.3 V, max 17.1 V) at 10 mA test current, with dynamic resistance of 0.085 Ω, clamp voltage of 17 V at 35 A, and total capacitance of 210 pF - enabling robust ESD/ surge protection in USB, sensor, and I/O interface circuits.
For engineers reviewing the CUHZ16V datasheet, CUHZ16V pinout, CUHZ16V application, or CUHZ16V equivalent, this page provides verified electrical parameters, package dimensions, IEC61000-4-2/4-5 compliance data, thermal derating curves, and direct alternative options for voltage-clamping design validation and BOM optimization.
Technical Context
The CUHZ16V operates as a two-terminal, unidirectional Zener diode with cathode-anode polarity, optimized for low-capacitance transient voltage suppression. Its planar epitaxial structure ensures stable breakdown characteristics and tight VZ tolerance (±3.5% typical), while its 2100 W peak pulse power rating (8/20 μs) supports IEC61000-4-5 Level 4 immunity requirements.
Thermal performance is defined by junction-to-ambient thermal resistance (rth(j-a)) dependent on PCB pad area: 120 K/W for 4 mm × 4 mm pads (PD*2 = 500 mW) and lower resistance for larger copper areas (PD*1 = 1200 mW). Dynamic impedance is characterized via TLP testing between 16 A and 30 A, confirming consistent clamping behavior under fast transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.3–17.1 V (min–max) at IZ = 10 mA; enables precise 16 V rail clamping with ±3.5% tolerance |
| Dynamic Resistance (ZZ) | 35 Ω max at IZ = 10 mA; ensures stable regulation under moderate load variation |
| Clamp Voltage (VC) | 17 V typical at IPP = 35 A (8/20 μs); defines maximum voltage seen by protected IC during surge |
| Peak Pulse Power (PPK) | 2100 W per IEC61000-4-5; supports industrial-level surge immunity without external series impedance |
| Total Capacitance (Ct) | 210 pF at VR = 14 V, f = 1 MHz; low enough for USB 2.0 and CAN FD signal integrity preservation |
| ESD Withstand (Contact) | ±30 kV per IEC61000-4-2; exceeds Level 4 for direct human-body model discharge protection |
| Reverse Leakage (IR) | 0.1 μA max at VR = 14 V; minimizes standby current in battery-powered sensor nodes |
Pinout & Package
CUHZ16V uses the US2H surface-mount package (SOD-323F), measuring 1.7 mm × 1.25 mm × 0.9 mm (typ.), with 5.4 mg mass. The device has two terminals: Pin 1 is Cathode (marked side), Pin 2 is Anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Connected to regulated voltage rail or protected node | Accepts transient energy during overvoltage events; must be routed with low-inductance trace to ground |
| 2 (Anode) | Connected to system ground reference | Serves as return path for clamping current; requires solid thermal and low-impedance ground plane connection |
Key Features
| Feature | Design Value |
|---|---|
| E24-series Zener voltage alignment | Enables drop-in replacement in legacy designs using standard 16 V reference points |
| Low dynamic impedance (0.085 Ω typ.) | Reduces voltage overshoot during fast transients, improving protection margin for downstream ICs |
| 2100 W peak pulse power capability | Eliminates need for series current-limiting resistors in many I/O protection layouts |
| 210 pF capacitance at 14 V reverse bias | Preserves signal integrity in high-speed interfaces up to 480 Mbps (USB 2.0 full-speed) |
| ±30 kV IEC61000-4-2 contact ESD rating | Meets automotive and industrial front-panel ESD requirements without additional TVS staging |
Applications
| Industrial Sensor Interface | USB 2.0 Data Line Protection |
|---|---|
Use Scenario: Protecting analog output pins of pressure/temperature sensors connected to PLC analog input modules exposed to field wiring surges. IC Role / Device Role: Zener-based transient voltage suppressor placed directly across sensor output and ground. Use Value: Limits induced surges to ≤17 V, preventing damage to 24 V-tolerant ADC inputs while adding only 210 pF loading. |
Use Scenario: ESD and surge protection on D+ and D− lines of embedded USB host controllers in medical diagnostic equipment. IC Role / Device Role: Bidirectional clamping diode (used in pair) with anode tied to ground and cathodes to each data line. Use Value: Maintains <500 mV eye diagram distortion at 480 Mbps while surviving ±8 kV contact ESD per IEC61000-4-2. |
| Automotive Body Control Module I/O | Smart Meter Communication Port |
Use Scenario: Protecting LIN bus transceiver pins against load-dump and ISO 7637-2 pulse 1/2a transients in door module ECUs. IC Role / Device Role: Secondary clamping device downstream of primary TVS, providing fine voltage regulation near IC VIO limits. Use Value: Clamps to 17 V within 1 ns, holding microcontroller I/O pins below absolute maximum rating of 18 V. |
Use Scenario: Surge protection on RS-485 half-duplex communication ports of utility smart meters installed in outdoor substations. IC Role / Device Role: Line-to-ground clamping element on A/B differential pairs, paired with common-mode choke. Use Value: Absorbs 2100 W (8/20 μs) per line without degradation, meeting IEC61000-4-5 Level 4 for outdoor metering infrastructure. |
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 |
|---|---|---|---|
| ON Semiconductor SZ1SMB16AT3G | DO-214AA package (larger, 4.5 mm × 3.2 mm); 16 V VZ, 2000 W PPK, 350 pF Ct | Higher capacitance limits use to sub-10 Mbps interfaces; better thermal mass for sustained surge duty | Select when board space allows larger footprint and higher average power handling is required over peak pulse rating |
| Vishay SMAJ16A | SMA package (same SOD-323F footprint not supported); 16 V VBR, 400 W PPP, 300 pF Ct | Lower peak power (400 W vs. 2100 W) and higher capacitance reduce effectiveness against IEC61000-4-5 surges | Choose only for cost-sensitive consumer applications where Level 3 (1 kV) surge immunity suffices |
Compared with SZ1SMB16AT3G and SMAJ16A, CUHZ16V offers superior high-speed signal compatibility due to its 210 pF capacitance and SOD-323F footprint, while delivering 5× higher peak pulse power than SMAJ16A and matching ON Semi's surge rating in a 60% smaller area - making it optimal for space-constrained, high-immunity industrial I/O designs.
Availability
CUHZ16V is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB 2.0 data line protection, and smart meter communication ports requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for CUHZ16V 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 Japanese semiconductor manufacturer specializing in power devices, logic ICs, and discrete components with emphasis on reliability, efficiency, and industrial-grade qualification.
The CUHZ Series was developed specifically for high-immunity, low-capacitance transient voltage suppression in compact, high-density PCB layouts - targeting automotive body electronics, industrial automation I/O, and portable instrumentation.
FAQ
What is the Zener voltage tolerance of CUHZ16V?
The CUHZ16V has a Zener voltage range of 15.3 V to 17.1 V at 10 mA test current, corresponding to ±3.5% tolerance around the nominal 16 V rating. This aligns with E24 series standard values and is verified per Toshiba's production test specifications at Ta = 25°C. The CUHZ16V maintains this tolerance across its qualified operating temperature range.
Does CUHZ16V meet IEC61000-4-5 surge immunity standards?
Yes, CUHZ16V is rated for 2100 W peak pulse power per IEC61000-4-5 (8/20 μs waveform), validated at 42 A peak pulse current. This meets Level 4 (4 kV line-to-ground) surge immunity requirements when used with appropriate PCB layout - including short traces, low-inductance ground connections, and adequate copper pour. The CUHZ16V datasheet provides VC–IPP curves confirming clamping behavior under standardized test conditions.
What is the thermal derating behavior of CUHZ16V above 25°C?
CUHZ16V's power dissipation is thermally derated linearly above 25°C ambient: PD*2 = 500 mW at Ta = 25°C drops to zero at Ta = 150°C (Tj limit), yielding a derating factor of 5.6 mW/°C for the 4 mm × 4 mm pad configuration. Derating curves are provided in Toshiba's CUHZ Series datasheet Figure PRSM–tw and PD–Ta, confirming safe operation up to 125°C ambient with proper board layout. CUHZ16V must not exceed 150°C junction temperature.
Can CUHZ16V be used for bidirectional ESD protection?
No - CUHZ16V is a unidirectional Zener diode with cathode-anode polarity and is intended for clamping positive transients to ground. For bidirectional protection (e.g., USB data lines), two CUHZ16V devices must be used in series opposition (anode-to-anode or cathode-to-cathode), or a dedicated bidirectional TVS like the Toshiba DF2S7.0FS should be selected. The CUHZ16V itself does not conduct in reverse breakdown below its specified VZ.
What is the marking code for CUHZ16V on the device body?
The CUHZ16V is marked with "M7" on its cathode end, per Toshiba's official marking list. This two-character code uniquely identifies the 16 V variant within the CUHZ Series and is laser-etched on the US2H package. The marking is positioned adjacent to the cathode band and conforms to JEDEC standards for SOD-323F devices. No other marking (e.g., date code or lot trace) replaces "M7" as the type identifier for CUHZ16V.
CUHZ16V,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):
- 16V
- Voltage - Breakdown (Min):
- 15.3V
- Voltage - Clamping (Max) @ Ipp:
- 17V (Typ)
- Current - Peak Pulse (10/1000µs):
- 42A (8/20µs)
- Power - Peak Pulse:
- 2100W (2.1kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 210pF @ 1MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- US2H
CUHZ16V,H3F FAQ
1.How can I place an order for CUHZ16V,H3F through Aetrix?
Please submit a Request for Quotation (RFQ) for CUHZ16V,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 CUHZ16V,H3F reliable?
The price and inventory of CUHZ16V,H3F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CUHZ16V,H3F is usually 5 days.
3.What payment methods are accepted for CUHZ16V,H3F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CUHZ16V,H3F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CUHZ16V,H3F?
CUHZ16V,H3F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CUHZ16V,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 CUHZ16V,H3F?
For technical support, including CUHZ16V,H3F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CUHZ16V,H3F requirements.
6.How does Aetrix verify that CUHZ16V,H3F is sourced from the original manufacturer or authorized distributors?
All CUHZ16V,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 CUHZ16V,H3F meets industry standards.
7.What is the process for return or replacement of CUHZ16V,H3F?
All CUHZ16V,H3F units undergo pre-shipment inspection (PSI). If there is an issue with CUHZ16V,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 CUHZ16V,H3F part is unused and in its original packaging.
Return procedure for CUHZ16V,H3F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CUHZ16V,H3F Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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