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Toshiba Semiconductor and Storage CUHZ24V,H3F
- Part No.:
- CUHZ24V,H3F
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
CUHZ24V,H3F.pdf
- Description:
- 24 V ZENER DIODE, SOD-323HE
- Quantity:
- Payment:
- Shipping:
Inventory:1,312
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Product details
Overview
CUHZ24V,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 24 V (min 22.8 V, max 25.6 V) at 10 mA test current, with dynamic resistance of 0.14 Ω and clamping voltage of 25.5 V at 70 A peak pulse current, supporting IEC61000-4-5 surge protection in industrial sensor interfaces.
For engineers reviewing the CUHZ24V,H3F datasheet, CUHZ24V,H3F pinout, CUHZ24V,H3F application, or CUHZ24V,H3F equivalent, key selection criteria include its 24 V Zener tolerance (±4.2%), 2100 W peak pulse power rating, 27 A peak pulse current capability, and US2H surface-mount package compatibility with compact PCB layouts requiring robust ESD immunity (±30 kV contact).
Technical Context
The CUHZ24V,H3F operates as a precision voltage reference and transient voltage suppressor in reverse-biased configuration, leveraging silicon epitaxial planar construction for stable breakdown characteristics across temperature. Its dynamic impedance of 0.14 Ω and clamping voltage of 25.5 V at 70 A ensure tight voltage control during fast transients.
Designed per IEC61000-4-2 (ESD) and IEC61000-4-5 (surge), it sustains ±30 kV contact ESD and 2100 W (8/20 μs) peak pulse power with junction temperature limited to 150°C. The device uses a two-terminal US2H package with cathode/anode polarity clearly marked (MB code) and optimized thermal dissipation on standard FR-4 substrates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24 V nominal (22.8–25.6 V range); enables precise 24 V rail clamping in industrial I/O circuits |
| Test Current (IZ) | 10 mA; standard bias point for guaranteed VZ specification and stable regulation |
| Dynamic Resistance (ZZ) | 0.14 Ω; ensures minimal voltage shift under load variation in feedback or reference paths |
| Clamp Voltage (VC) | 25.5 V at 70 A peak pulse; defines maximum voltage seen by protected IC during 8/20 μs surge events |
| Peak Pulse Power (PPK) | 2100 W (IEC61000-4-5); supports high-energy surge suppression without thermal runaway |
| ESD Withstand (Contact) | ±30 kV per IEC61000-4-2; eliminates need for external ESD diodes in USB, RS-485, or CAN node protection |
| Total Capacitance (Ct) | 150 pF at 0 V, 1 MHz; low enough to avoid signal integrity degradation in ≤10 Mbps digital interfaces |
Pinout & Package
CUHZ24V,H3F is housed in the US2H surface-mount package (5.4 mg typical weight), featuring a two-terminal configuration with cathode (pin 1) and anode (pin 2) identified by marking "MB" on the top surface. Land pattern dimensions are specified for reliable soldering on standard FR-4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | High-side connection to protected line | Connected to signal or power rail needing clamping; carries surge current into ground path |
| 2 (Anode) | Low-side connection to reference potential | Tied to system ground or common return; completes conduction path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| E24-series Zener voltage alignment | 24 V nominal matches standard resistor/voltage-divider design libraries for seamless integration |
| US2H ultra-small footprint | 0.6 × 1.2 mm outline enables placement directly at connector or header entry points |
| 2100 W IEC61000-4-5 surge rating | Withstands repeated 8/20 μs surges up to 27 A without parameter drift or failure |
| ±30 kV IEC61000-4-2 ESD immunity | Eliminates secondary ESD protection components in human-interface circuits |
| 150°C maximum junction temperature | Supports operation in sealed enclosures or high-ambient environments without derating |
Applications
| Industrial Sensor Interface | RS-485 Transceiver Protection |
|---|---|
Use Scenario: Protecting analog output lines of 4–20 mA current-loop sensors exposed to field wiring surges. IC Role / Device Role / Timing Role: Zener clamp placed between signal line and ground to limit voltage excursion during induced transients. Use Value: Maintains signal integrity below 25.5 V during 2100 W surges, preventing ADC saturation or op-amp latch-up in downstream signal conditioning. |
Use Scenario: Safeguarding differential data lines of RS-485 transceivers connected to long cables in factory automation. IC Role / Device Role / Timing Role: Bidirectional transient suppressor mounted at connector entry to shunt common-mode surges. Use Value: Limits bus voltage to ≤25.5 V during 8/20 μs events, preserving transceiver functionality and avoiding false logic states. |
| USB-C Port ESD Protection | PLC Digital Input Module |
Use Scenario: Adding secondary ESD hardening to USB-C CC and VCONN lines where primary TVS may be undersized. IC Role / Device Role / Timing Role: Low-capacitance (150 pF) Zener clamp referenced to ground for fast ESD discharge. Use Value: Absorbs ±30 kV contact ESD pulses without degrading high-speed signaling integrity on 5 Gbps lanes. |
Use Scenario: Protecting 24 V DC digital input channels in programmable logic controllers against accidental wiring faults. IC Role / Device Role / Timing Role: Primary overvoltage limiter on input circuitry, clamping transients before optocoupler input stage. Use Value: Ensures input remains within 24 V ±10% window during 27 A surge events, preventing false triggering or component damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener-based transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A (onsemi) | DO-214AC package; 24 V VBR min 22.8 V, 400 W PPP, 19.3 A IPP | Lower surge rating limits use to Class B environments; larger footprint requires board rework | Select when legacy DO-214AC layout exists and surge energy is ≤400 W |
| P6SMB24A (Littelfuse) | DO-214AA package; 24 V VBR min 22.8 V, 600 W PPP, 27.3 A IPP | Higher clamping voltage (38.9 V) increases risk of downstream IC damage during surge | Choose only if US2H footprint is unavailable and higher VC is acceptable in system margin analysis |
Compared with SMAJ24A and P6SMB24A, CUHZ24V,H3F provides 3.5× higher peak pulse power (2100 W vs. 400/600 W) and 30% lower clamping voltage (25.5 V vs. 32.4/38.9 V) in a 70% smaller US2H package-enabling superior surge resilience in space-constrained industrial nodes.
Availability
CUHZ24V,H3F is available at Aetrix Electronics and suitable for industrial sensor interfaces, RS-485 communication ports, and PLC digital input modules requiring stable component supply with full traceability and lifecycle support.
Supply support for CUHZ24V,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 designs and manufactures discrete semiconductors, power devices, and logic ICs with emphasis on reliability, efficiency, and industrial-grade performance.
The CUHZ Series targets compact, high-reliability transient voltage suppression in space-constrained industrial and automotive electronics, prioritizing low dynamic impedance, tight Zener tolerance, and certified IEC surge/ESD compliance.
FAQ
What is the Zener voltage tolerance of CUHZ24V,H3F?
The CUHZ24V,H3F has a Zener voltage range of 22.8 V (minimum) to 25.6 V (maximum) at 10 mA test current, corresponding to a ±4.2% tolerance around the nominal 24 V rating. This E24-series alignment ensures compatibility with standard voltage divider networks and reference designs used in industrial control systems. The CUHZ24V,H3F maintains this specification across its operating temperature range and is verified per Toshiba's production test flow.
Does CUHZ24V,H3F meet IEC61000-4-5 surge immunity standards?
Yes, CUHZ24V,H3F is rated for 2100 W peak pulse power per IEC61000-4-5 with an 8/20 μs waveform, delivering a clamping voltage of 25.5 V at 70 A peak pulse current. This performance is validated using the standard test setup and confirms suitability for Level 4 surge protection in industrial equipment. The CUHZ24V,H3F achieves this while maintaining low dynamic resistance (0.14 Ω) to minimize voltage overshoot during fast transients.
What package type does CUHZ24V,H3F use, and what are its dimensions?
CUHZ24V,H3F uses the US2H surface-mount package, measuring 0.6 mm × 1.2 mm with a typical weight of 5.4 mg. Its land pattern is optimized for reflow soldering on standard FR-4 PCBs, and polarity is marked with "MB" on the top surface indicating cathode (pin 1) and anode (pin 2). The CUHZ24V,H3F's ultra-compact size enables direct placement at board edges or connectors without compromising surge path inductance.
How does CUHZ24V,H3F perform under ESD stress?
CUHZ24V,H3F withstands ±30 kV contact discharge per IEC61000-4-2, making it suitable for protecting human-accessible ports such as USB, RS-232, or front-panel I/O. Its low clamping voltage (25.5 V) and fast response prevent latch-up or gate oxide damage in connected ICs. The CUHZ24V,H3F achieves this ESD robustness without sacrificing signal integrity, thanks to its 150 pF capacitance at 0 V and 1 MHz.
Can CUHZ24V,H3F replace older Zener diodes like 1N4749A in new designs?
CUHZ24V,H3F is not a drop-in replacement for through-hole Zeners like 1N4749A due to its US2H SMD package, different thermal profile, and enhanced surge rating (2100 W vs. ~1 W). However, it can functionally replace them in new PCB designs where space, surge immunity, and ESD robustness are critical. The CUHZ24V,H3F offers tighter voltage tolerance, lower dynamic impedance, and certified IEC compliance-making it preferable for modern industrial edge nodes.
CUHZ24V,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):
- 24V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 25.5V (Typ)
- Current - Peak Pulse (10/1000µs):
- 27A (8/20µs)
- Power - Peak Pulse:
- 2100W (2.1kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 150pF @ 1MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- US2H
CUHZ24V,H3F FAQ
1.How can I place an order for CUHZ24V,H3F through Aetrix?
Please submit a Request for Quotation (RFQ) for CUHZ24V,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 CUHZ24V,H3F reliable?
The price and inventory of CUHZ24V,H3F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CUHZ24V,H3F is usually 5 days.
3.What payment methods are accepted for CUHZ24V,H3F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CUHZ24V,H3F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CUHZ24V,H3F?
CUHZ24V,H3F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CUHZ24V,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 CUHZ24V,H3F?
For technical support, including CUHZ24V,H3F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CUHZ24V,H3F requirements.
6.How does Aetrix verify that CUHZ24V,H3F is sourced from the original manufacturer or authorized distributors?
All CUHZ24V,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 CUHZ24V,H3F meets industry standards.
7.What is the process for return or replacement of CUHZ24V,H3F?
All CUHZ24V,H3F units undergo pre-shipment inspection (PSI). If there is an issue with CUHZ24V,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 CUHZ24V,H3F part is unused and in its original packaging.
Return procedure for CUHZ24V,H3F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CUHZ24V,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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Diodes Incorporated
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Diodes Incorporated
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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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Diodes Incorporated
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