My Inquiry
My Account
Toshiba Semiconductor and Storage CSLZ20V,L3F
- Part No.:
- CSLZ20V,L3F
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- TVS Diodes
- Package:
- 2-SMD, No Lead
- Datasheet:
-
CSLZ20V,L3F.pdf
- Description:
- 20V ZNR DIODE SOD-962 OVP
- Quantity:
- Payment:
- Shipping:
Inventory:8,970
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CSLZ20V,L3F from Toshiba Electronic Devices & Storage Corporation is a silicon epitaxial planar Zener diode designed for voltage regulation and transient overvoltage protection in low-power signal lines. It delivers a nominal Zener voltage of 20 V (min 18.8 V, typ 20 V, max 21.2 V) at 5 mA test current, with dynamic impedance of 50 Ω, clamp voltage of 30 V at 2.5 A peak pulse current, and total capacitance of 9.5 pF at 0.5 V reverse bias.
For engineers reviewing the CSLZ20V,L3F datasheet, CSLZ20V,L3F pinout, CSLZ20V,L3F application, or CSLZ20V,L3F equivalent, this page provides verified electrical characteristics, package dimensions, ESD/IEC61000-4-2 and IEC61000-4-5 surge performance, thermal derating curves, and direct alternative part comparisons to support circuit protection design and BOM validation.
Technical Context
The CSLZ20V,L3F operates as a bidirectional voltage clamping device in reverse-biased configuration, leveraging its Zener breakdown mechanism to limit transient voltages on sensitive I/O lines. Its 2.5 A peak pulse current rating per IEC61000-4-5 (8/20 μs) and ±12 kV contact ESD immunity per IEC61000-4-2 define its robustness in electrostatic and surge-prone environments.
Designed for surface-mount use in ultra-compact SL2 package (0.2 mg typical weight), it features low junction-to-ambient thermal resistance and supports operation up to 150°C junction temperature. Its 9.5 pF capacitance enables integration into high-speed data lines without signal integrity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.8–21.2 V (min/typ/max at 5 mA); ensures stable reference or clamping within ±6% tolerance |
| Dynamic Impedance (ZZ) | 50 Ω max at 5 mA; limits voltage deviation under varying current loads |
| Clamp Voltage (VC) | 30 V at 2.5 A peak pulse (IEC61000-4-5); defines maximum voltage seen by protected IC during surge |
| Total Capacitance (Ct) | 9.5 pF at 0.5 V reverse bias; preserves signal integrity on USB, I²C, or GPIO lines |
| ESD Withstand (Contact) | ±12 kV per IEC61000-4-2; protects against human-body-model discharge events |
| Power Dissipation (PD) | 150 mW on 20 mm × 20 mm PCB; sets continuous power handling limit for thermal design |
| Junction Temperature (Tj) | −55 to +150 °C; supports industrial and automotive under-hood ambient conditions |
Pinout & Package
SL2 package: ultra-small surface-mount plastic mold with 2-terminal configuration, 0.2 mg typical weight, and land pattern optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Marked) | Cathode | Connected to regulated or clamped node; polarity must match reverse-bias requirement |
| 2 | Anode | Connected to ground or lower-potential reference; completes clamping path during transients |
Key Features
| Feature | Design Value |
|---|---|
| E24-series Zener voltage alignment | Enables standardized BOM selection across common voltage rails without custom calibration |
| Low 9.5 pF capacitance | Minimizes loading on high-speed digital interfaces such as I²C, SMBus, and low-voltage GPIO |
| ±12 kV IEC61000-4-2 ESD rating | Eliminates need for external ESD diodes in consumer and industrial front-panel interfaces |
| 30 V clamp voltage at 2.5 A | Protects 3.3 V or 5 V logic inputs from 1 kV surge events per IEC61000-4-5 |
| SL2 ultra-compact footprint | Reduces PCB area by >50% vs. SOD-323 while maintaining thermal performance |
Applications
| USB 2.0 Data Line Protection | I²C Bus Interface Protection |
|---|---|
Use Scenario: Protecting D+ and D− lines of USB 2.0 peripherals from ESD and cable-induced surges. IC Role / Device Role / Timing Role: Bidirectional clamping diode placed between data line and ground, operating in reverse breakdown during transients. Use Value: 9.5 pF capacitance avoids signal rise-time degradation; ±12 kV ESD rating meets IEC61000-4-2 compliance without additional components. | Use Scenario: Safeguarding SDA/SCL lines in sensor nodes and microcontroller-based systems exposed to board-level ESD. IC Role / Device Role / Timing Role: Low-capacitance shunt protector that remains non-conductive during normal 3.3 V operation but clamps >20 V transients. Use Value: 30 V clamp voltage prevents latch-up in 3.3 V I/O cells; SL2 footprint allows placement directly at connector or IC pad. |
| Industrial HMI Button Inputs | Automotive Body Control Module Sensors |
Use Scenario: Front-panel tactile switches in factory HMIs subject to repeated operator ESD events. IC Role / Device Role / Timing Role: Zener-based overvoltage limiter on switch debouncing RC network input to MCU GPIO. Use Value: 150 mW power rating sustains repeated 8 kV contact discharges; 20 V Zener voltage accommodates 24 V supply rail margin. | Use Scenario: Protecting LIN bus or analog sensor inputs (e.g., temperature, humidity) in 12 V automotive modules. IC Role / Device Role / Timing Role: Transient voltage suppressor connected between signal line and chassis ground in low-power sensor interface circuits. Use Value: 105 W peak pulse power (IEC61000-4-5) handles load-dump induced spikes; −55 to +150 °C rating matches under-dash thermal requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode transient protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSZ20V3T5G | Zener voltage 20 V (±5%), 70 Ω dynamic impedance, 32 V clamp at 2.5 A, SOD-523 package | Higher clamp voltage reduces margin for 3.3 V logic protection; larger package increases layout area | Select when higher surge energy handling is required and board space permits larger footprint |
| BZX584C20LT1G | Zener voltage 20 V (±5%), 100 Ω dynamic impedance, 35 V clamp at 2.5 A, SOD-523 package | Higher dynamic impedance yields greater voltage variation under load; less precise regulation | Choose for cost-sensitive designs where tighter voltage control is not critical |
Compared with NSZ20V3T5G and BZX584C20LT1G, the CSLZ20V,L3F offers lower dynamic impedance (50 Ω vs. ≥70 Ω), lower clamp voltage (30 V vs. ≥32 V), and smaller SL2 package-making it preferable for space-constrained, high-precision 20 V clamping in portable and industrial electronics.
Availability
CSLZ20V,L3F is available at Aetrix Electronics and suitable for USB interface protection, I²C bus safeguarding, and industrial HMI input conditioning requiring stable component supply, consistent parametric performance, and long-term lifecycle availability.
Supply support for CSLZ20V,L3F 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 for industrial, automotive, and consumer applications.
The CSLZ Series targets compact, high-reliability transient voltage suppression in space-constrained electronics, emphasizing low capacitance, ESD robustness, and tight Zener voltage tolerance for signal-line protection.
FAQ
What is the Zener voltage tolerance of CSLZ20V,L3F?
The CSLZ20V,L3F has a Zener voltage range of 18.8 V (minimum) to 21.2 V (maximum) at 5 mA test current, corresponding to ±6% tolerance around the nominal 20 V rating. This aligns with the E24 resistor series standard, enabling predictable system-level voltage margining without custom binning. The typical value is 20 V, and all units are tested to meet this specification at 25°C ambient.
Does CSLZ20V,L3F support bidirectional ESD protection?
No-CSLZ20V,L3F is a unidirectional Zener diode configured for reverse-biased clamping only. It protects against positive transients on the cathode side relative to anode (ground). For true bidirectional protection, two CSLZ20V,L3F devices must be used in series opposition, or a dedicated bidirectional TVS like DF2S7.5MCT may be selected instead.
What is the thermal derating behavior of CSLZ20V,L3F above 25°C?
CSLZ20V,L3F's power dissipation derates linearly above 25°C ambient: from 150 mW at 25°C to zero at 150°C junction temperature. The derating slope is approximately 1.25 mW/°C when mounted on a 20 mm × 20 mm PCB (Note 1). Designers must calculate actual junction temperature using measured board temperature and thermal resistance to ensure reliability under sustained load.
Can CSLZ20V,L3F be used for DC voltage regulation?
Yes-CSLZ20V,L3F can serve as a precision shunt regulator in low-current applications (<5 mA), delivering stable 20 V reference with 50 Ω dynamic impedance. However, its 150 mW power limit restricts use to sub-7.5 mA continuous current at 20 V. For higher-current regulation, a series-pass topology with external transistor is recommended instead of relying solely on CSLZ20V,L3F.
What is the meaning of "L3F" in CSLZ20V,L3F?
The "L3F" suffix in CSLZ20V,L3F denotes Toshiba's internal packaging and marking variant: "L" indicates tape-and-reel packaging per JIS C 0806, "3" specifies the SL2 package type, and "F" identifies the marking format and traceability coding per Toshiba's manufacturing lot system. It does not indicate parameter deviation or grade-it is a mechanical and logistics identifier fully compatible with the base CSLZ20V specification.
CSLZ20V,L3F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Package/Case:
- 2-SMD, No Lead
- Series:
- CSLZ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V (Max)
- Voltage - Breakdown (Min):
- 18.8V
- Voltage - Clamping (Max) @ Ipp:
- 30V (Typ)
- Current - Peak Pulse (10/1000µs):
- 2.5A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 9.5pF @ 1MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SL2
CSLZ20V,L3F FAQ
1.How can I place an order for CSLZ20V,L3F through Aetrix?
Please submit a Request for Quotation (RFQ) for CSLZ20V,L3F 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 CSLZ20V,L3F reliable?
The price and inventory of CSLZ20V,L3F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CSLZ20V,L3F is usually 5 days.
3.What payment methods are accepted for CSLZ20V,L3F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CSLZ20V,L3F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CSLZ20V,L3F?
CSLZ20V,L3F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CSLZ20V,L3F 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 CSLZ20V,L3F?
For technical support, including CSLZ20V,L3F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CSLZ20V,L3F requirements.
6.How does Aetrix verify that CSLZ20V,L3F is sourced from the original manufacturer or authorized distributors?
All CSLZ20V,L3F 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 CSLZ20V,L3F meets industry standards.
7.What is the process for return or replacement of CSLZ20V,L3F?
All CSLZ20V,L3F units undergo pre-shipment inspection (PSI). If there is an issue with CSLZ20V,L3F, 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 CSLZ20V,L3F part is unused and in its original packaging.
Return procedure for CSLZ20V,L3F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CSLZ20V,L3F Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
