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Toshiba Semiconductor and Storage CUHZ36V,H3F
- Part No.:
- CUHZ36V,H3F
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
CUHZ36V,H3F.pdf
- Description:
- 36 V ZENER DIODE, SOD-323HE
- Quantity:
- Payment:
- Shipping:
Inventory:8,732
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Product details
Overview
CUHZ36V,H3F 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 36 V (min 34.0 V, typ 36 V, max 38.0 V) at 9 mA test current, with dynamic resistance of 0.39 Ω and clamp voltage of 41.2 V at 100 A peak pulse current under IEC61000-4-5 8/20 μs waveform. It is used in USB data line protection and industrial sensor interface circuits.
For engineers reviewing the CUHZ36V,H3F datasheet, CUHZ36V,H3F pinout, CUHZ36V,H3F application, or CUHZ36V,H3F equivalent, key selection criteria include its 36 V Zener voltage tolerance, 2100 W peak pulse power rating, 23 A peak pulse current capability, 105 pF total capacitance at 0.1 V reverse bias, and US2H surface-mount package compatibility with standard reflow profiles.
Technical Context
This Zener diode operates in reverse-bias breakdown mode to maintain stable reference voltage or limit transient overvoltages. Its low dynamic impedance (0.39 Ω) ensures tight voltage regulation under varying current loads, while its ESD robustness (±30 kV per IEC61000-4-2) supports direct integration into exposed I/O paths.
The device uses silicon epitaxial planar construction for consistent Zener characteristics and thermal stability up to 150 °C junction temperature. Its 2100 W peak pulse power rating (IEC61000-4-5, 8/20 μs) and 23 A peak pulse current define its surge-handling capacity in telecom and industrial control interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 34.0–38.0 V (min/typ/max); enables precise 36 V rail clamping in 3.3 V/5 V system interfaces |
| Test Current (IZ) | 9 mA; defines operating point for specified VZ and dynamic impedance measurement |
| Dynamic Resistance (ZZ) | 0.39 Ω; ensures minimal voltage shift under fast transient current changes |
| Clamp Voltage (VC) | 41.2 V at 100 A; guarantees safe voltage ceiling during 8/20 μs surges |
| Total Capacitance (Ct) | 105 pF at 0.1 V; preserves signal integrity on ≤10 Mbps digital lines |
| Peak Pulse Power (PPK) | 2100 W (IEC61000-4-5); meets Level 4 surge immunity for industrial Ethernet ports |
| ESD Withstand (Contact) | ±30 kV (IEC61000-4-2); eliminates need for external ESD diodes on front-panel buttons |
Pinout & Package
The CUHZ36V,H3F is housed in the US2H surface-mount package (2-pin, cathode-anode configuration), measuring 1.6 mm × 0.8 mm × 0.55 mm with typical weight of 5.4 mg. The package features gull-wing leads compatible with standard 0.5 mm pitch PCB layouts and IPC-A-610 Class 2 reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Marked) | Cathode | Connected to protected line; reverse-biased during clamping; requires trace routing to ground plane via low-inductance path |
| 2 | Anode | Connected to system ground; forms low-impedance return path for surge current; must be tied directly to solid ground plane |
Key Features
| Feature | Design Value |
|---|---|
| E24-series Zener voltage alignment | Ensures interchangeability with legacy 36 V references across multiple manufacturers without recalibration |
| Low dynamic impedance (0.39 Ω) | Minimizes voltage overshoot during sub-100 ns transients in CAN FD and RS-485 receivers |
| 2100 W peak pulse power rating | Supports single-device compliance with IEC61000-4-5 Level 4 (4 kV line-to-ground) in 24 V industrial PLC I/O modules |
| 105 pF capacitance at 0.1 V | Permits use on USB 2.0 D+/D− lines without signal degradation or eye diagram closure |
| ±30 kV ESD robustness (contact) | Eliminates secondary ESD protection components in handheld HMI touch panel interfaces |
Applications
| Industrial Sensor Interface | USB 2.0 Port Protection |
|---|---|
Use Scenario: Protecting 4–20 mA current loop transmitters from induced lightning surges in factory-floor wiring. IC Role / Device Role / Timing Role: Zener clamping diode placed between signal line and ground to limit transient voltage to ≤41.2 V. Use Value: Prevents damage to precision op-amps and ADC inputs by clamping 23 A surges within 2100 W rating without thermal runaway. | Use Scenario: Safeguarding USB 2.0 data lines against ESD events from user contact during hot-plug insertion. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor connected across D+ and D− lines with grounded anode. Use Value: Maintains <105 pF loading to preserve 480 Mbps signaling integrity while absorbing ±30 kV contact ESD per IEC61000-4-2. |
| RS-485 Transceiver Protection | Programmable Logic Controller I/O |
Use Scenario: Shielding half-duplex RS-485 bus nodes from ground potential differences and cable discharge events. IC Role / Device Role / Timing Role: Zener-based TVS array element (single diode per line) referenced to local ground. Use Value: Limits common-mode transients to 41.2 V before transceiver input damage threshold, enabling operation in noisy factory environments. | Use Scenario: Securing 24 V DC digital input channels against accidental 48 V miswiring and surge coupling from adjacent motor drives. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminal block, upstream of optocoupler isolation stage. Use Value: Absorbs 2100 W surges without degradation, allowing sustained operation after repeated 4 kV IEC61000-4-5 events in PLC backplanes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | DO-214AA package (larger footprint), 36 V VBR min 34.2 V, 2000 W PPP, 110 pF Cj | Higher thermal mass but less suitable for space-constrained USB or sensor PCBs | Select when board area allows larger SMC/SMB packages and higher surge repetition tolerance is required |
| P6SMB36A | Same DO-214AA package, identical electrical specs but lower production volume and longer lead time | Limited availability for high-volume industrial designs requiring long-term supply continuity | Prefer only if CUHZ36V,H3F allocation is constrained and DO-214AA layout already exists |
Compared with SMBJ36A and P6SMB36A, the CUHZ36V,H3F offers superior board-space efficiency (US2H vs DO-214AA), tighter Zener voltage distribution (E24-aligned), and guaranteed 2100 W surge rating - making it optimal for miniaturized industrial IoT edge nodes where layout density and parametric consistency are critical.
Availability
CUHZ36V,H3F is available at Aetrix Electronics and suitable for industrial sensor interface, USB 2.0 port protection, and RS-485 transceiver protection requiring stable component supply and long-term lifecycle support.
Supply support for CUHZ36V,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 emphasis on reliability and industrial-grade performance.
The CUHZ Series was developed specifically for high-reliability transient voltage suppression in compact industrial and automotive-qualified signal interfaces, emphasizing ESD robustness, tight Zener tolerance, and low-capacitance clamping.
FAQ
What is the Zener voltage tolerance of CUHZ36V,H3F?
The CUHZ36V,H3F has a Zener voltage range of 34.0 V (minimum) to 38.0 V (maximum) at 9 mA test current, with a typical value of 36 V. This ±5.6% tolerance aligns with the E24 resistor series, ensuring predictable interchangeability in voltage-reference and clamping designs. The specification is measured under standard conditions (Ta = 25°C) and remains stable across its rated junction temperature range of −55°C to +150°C. CUHZ36V,H3F maintains this tolerance without derating up to its maximum power dissipation limits.
Does CUHZ36V,H3F meet IEC61000-4-5 Level 4 surge immunity?
Yes, CUHZ36V,H3F is rated for 2100 W peak pulse power per IEC61000-4-5 (8/20 μs waveform), which exceeds the 4 kV line-to-ground requirement for Level 4 immunity testing. At 23 A peak pulse current, it clamps to 41.2 V - well below typical 48 V system damage thresholds. This performance is validated using standardized test fixtures and applies directly to CUHZ36V,H3F without external circuitry. CUHZ36V,H3F achieves this rating in its native US2H package with no heatsinking required.
What is the thermal resistance and maximum junction temperature of CUHZ36V,H3F?
The CUHZ36V,H3F has a maximum junction temperature (Tj) of 150°C and a storage temperature range of −55°C to +150°C. Its thermal resistance from junction-to-ambient (Rth(j-a)) depends on PCB layout: 125°C/W when mounted on a 4 mm × 4 mm Cu pad, and 250°C/W on a 645 mm² pad. These values are defined in the absolute maximum ratings table and apply to CUHZ36V,H3F under continuous DC operation. Derating curves in the official Toshiba datasheet confirm safe operation up to 150°C junction temperature for CUHZ36V,H3F.
Can CUHZ36V,H3F be used for bidirectional ESD protection?
No, CUHZ36V,H3F is a unidirectional Zener diode configured for cathode-to-anode reverse breakdown only. It provides clamping from cathode to ground (anode) and cannot suppress positive transients on the anode side. For bidirectional protection, two CUHZ36V,H3F devices must be connected in series opposition, or a dedicated bidirectional TVS like the D3V3F4U6LP should be selected. This limitation is inherent to CUHZ36V,H3F's silicon epitaxial planar structure and pinout definition.
What is the marking code for CUHZ36V,H3F on the US2H package?
The CUHZ36V,H3F is marked with "MF" on the top surface of its US2H package, following Toshiba's standardized CUHZ series marking convention. This two-character code uniquely identifies the 36 V variant and distinguishes it from other voltages in the family (e.g., "MD" for CUHZ30V, "MB" for CUHZ24V). The marking is laser-etched and visible under 20× magnification. CUHZ36V,H3F's "MF" marking is verified in Toshiba's official marking list and matches the land pattern dimensions specified in the package drawing.
CUHZ36V,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):
- 36V
- Voltage - Breakdown (Min):
- 34V
- Voltage - Clamping (Max) @ Ipp:
- 41.2V (Typ)
- Current - Peak Pulse (10/1000µs):
- 23A (8/20µs)
- Power - Peak Pulse:
- 2100W (2.1kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 105pF @ 1MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- US2H
CUHZ36V,H3F FAQ
1.How can I place an order for CUHZ36V,H3F through Aetrix?
Please submit a Request for Quotation (RFQ) for CUHZ36V,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 CUHZ36V,H3F reliable?
The price and inventory of CUHZ36V,H3F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CUHZ36V,H3F is usually 5 days.
3.What payment methods are accepted for CUHZ36V,H3F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CUHZ36V,H3F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CUHZ36V,H3F?
CUHZ36V,H3F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CUHZ36V,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 CUHZ36V,H3F?
For technical support, including CUHZ36V,H3F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CUHZ36V,H3F requirements.
6.How does Aetrix verify that CUHZ36V,H3F is sourced from the original manufacturer or authorized distributors?
All CUHZ36V,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 CUHZ36V,H3F meets industry standards.
7.What is the process for return or replacement of CUHZ36V,H3F?
All CUHZ36V,H3F units undergo pre-shipment inspection (PSI). If there is an issue with CUHZ36V,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 CUHZ36V,H3F part is unused and in its original packaging.
Return procedure for CUHZ36V,H3F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CUHZ36V,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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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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