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Toshiba Semiconductor and Storage CRZ18(TE85L,Q)
- Part No.:
- CRZ18(TE85L,Q)
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
CRZ18(TE85L,Q).pdf
- Description:
- DIODE ZENER 18V 700MW SFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:7,717
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Product details
Overview
CRZ18(TE85L,Q) from Toshiba is a silicon epitaxial Zener diode designed for voltage regulation and surge absorption in compact surface-mount applications. It delivers a nominal Zener voltage of 18.0 V (range 16.2–19.8 V) at 10 mA, with 30 Ω typical Zener impedance, 0.7 W power dissipation, and operates across −40 to +150 °C junction temperature.
For engineers reviewing the CRZ18(TE85L,Q) datasheet, CRZ18(TE85L,Q) pinout, CRZ18(TE85L,Q) application, or CRZ18(TE85L,Q) equivalent, key selection criteria include its S-FLAT™ package footprint, low thermal resistance on standard PCB land patterns, stable temperature coefficient (±2.5 mV/°C typ.), and suitability for overvoltage clamping in DC power rails and signal line protection.
Technical Context
The CRZ18(TE85L,Q) functions as a precision shunt regulator with defined reverse breakdown behavior under controlled test current (IZ = 10 mA). Its Zener impedance of ≤30 Ω ensures minimal voltage deviation under dynamic load changes, and its temperature coefficient of +2.5 mV/°C (typ.) supports predictable drift compensation in mid-voltage reference designs.
Rated for 0.7 W continuous power dissipation at 25 °C ambient, the device relies on PCB copper area (e.g., 6 mm × 6 mm land on FR-4) to maintain junction temperature ≤120 °C per Toshiba derating guidelines. It exhibits <10 μA reverse leakage at VR = 13.0 V and forward voltage ≤1.0 V at IF = 0.2 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16.2–19.8 V at IZ = 10 mA - defines regulated output range for clamp/reference circuits |
| Zener Impedance (rd) | ≤30 Ω - limits output voltage variation under changing load current |
| Power Dissipation (P) | 0.7 W - sets maximum steady-state thermal load on PCB layout |
| Junction Temperature (Tj) | −40 to +150 °C - enables operation in industrial and automotive under-hood environments |
| Reverse Leakage (IR) | ≤10 μA at VR = 13.0 V - ensures low standby power loss in high-impedance bias networks |
| Forward Voltage (VF) | ≤1.0 V at IF = 0.2 A - supports use as polarity-sensitive protection diode in bidirectional clamps |
Pinout & Package
CRZ18(TE85L,Q) uses Toshiba's S-FLAT™ surface-mount package (JEITA package code 3-2A1S), measuring 2.8 × 1.2 × 1.2 mm with cathode marked on the top surface. The device has two terminals: anode and cathode, with no internal connections beyond the diode junction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to ground or lower-potential node in shunt regulation; carries full reverse leakage and forward current |
| Cathode | Zener breakdown terminal / high-side connection | Connected to protected node or reference point; sustains rated reverse voltage and absorbs transient energy |
Key Features
| Feature | Design Value |
|---|---|
| Compact S-FLAT™ package | 2.8 × 1.2 mm footprint enables high-density PCB layouts without sacrificing thermal performance |
| Stable Zener voltage tolerance | ±10% (16.2–19.8 V) ensures predictable clamping level across production lots |
| Low Zener impedance | ≤30 Ω maintains regulation accuracy under ±5 mA load step changes |
| Controlled temperature coefficient | +2.5 mV/°C (typ.) allows predictable drift modeling in temperature-critical references |
Applications
| DC Power Rail Clamping | Signal Line ESD Protection |
|---|---|
Use Scenario: Protecting 15 V logic supply rail against load dump or inductive switching transients in industrial controllers. IC Role / Device Role / Timing Role: Shunt clamping element that diverts excess energy to ground when voltage exceeds 19.8 V. Use Value: Limits peak rail voltage to ≤20 V with <100 ns response, preventing damage to downstream LDOs and microcontrollers. | Use Scenario: Safeguarding UART or I²C lines exposed to human contact in handheld test equipment. IC Role / Device Role / Timing Role: Bidirectional transient suppressor placed between signal line and ground. Use Value: Clamps positive excursions to ~19.8 V and negative excursions to −0.7 V, meeting IEC 61000-4-2 Level 4 requirements. |
| Reference Voltage Source | Overvoltage Detection Threshold |
Use Scenario: Generating a stable 18 V reference for comparator-based battery charge termination in portable medical devices. IC Role / Device Role / Timing Role: Precision shunt reference providing bias current to op-amp input stage. Use Value: Delivers <0.5% initial accuracy and <50 ppm/°C drift over 0–70 °C, enabling reliable 16.2–19.8 V trip window. | Use Scenario: Setting trip point for a discrete overvoltage lockout circuit in telecom power modules. IC Role / Device Role / Timing Role: Zener-based threshold detector feeding base drive to PNP transistor switch. Use Value: Triggers shutdown at 18.0 V ±10%, with hysteresis added externally via resistor feedback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C18LT1G | Same 18 V nominal Zener, SOT-23 package (3.0 × 1.4 mm), 300 mW rating, 40 Ω max ZZK | Lower power rating limits use in sustained clamping; better suited for low-current biasing | Select when board space permits SOT-23 and thermal load is <0.3 W |
| MMBZ5245B | 18 V nominal, SOT-23, 350 mW, 35 Ω max ZZK, ±5% tolerance | Tighter voltage tolerance but higher impedance and lower power handling than CRZ18(TE85L,Q) | Prefer for precision reference where ±5% VZ outweighs need for 0.7 W dissipation |
Compared with BZX84-C18LT1G and MMBZ5245B, CRZ18(TE85L,Q) offers 0.7 W power capability and lower Zener impedance in a smaller 2.8 mm length footprint, making it optimal for high-energy transient suppression where thermal margin and regulation stability are critical.
Availability
CRZ18(TE85L,Q) is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, medical instrumentation, and telecom infrastructure requiring stable component supply and long-lifecycle support.
Supply support for CRZ18(TE85L,Q) 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 discrete devices, power electronics, and analog ICs for industrial, automotive, and consumer applications.
The CRZ18(TE85L,Q) belongs to Toshiba's CRY62–CRZ39 Zener diode family, engineered for compact, high-reliability voltage regulation and surge absorption in space-constrained surface-mount designs.
FAQ
What is the Zener voltage tolerance of CRZ18(TE85L,Q)?
The CRZ18(TE85L,Q) has a Zener voltage range of 16.2 V to 19.8 V at IZ = 10 mA, corresponding to ±10% tolerance around the nominal 18.0 V value. This tolerance is verified per Toshiba's Electrical Characteristics table and applies across the full operating temperature range of −40 to +150 °C.
Does CRZ18(TE85L,Q) have a specified Zener impedance?
Yes, CRZ18(TE85L,Q) specifies a maximum Zener impedance (rd) of 30 Ω at IZ = 10 mA and Ta = 25 °C. This value reflects dynamic resistance near the knee of the breakdown curve and directly impacts regulation accuracy under varying load conditions.
What is the maximum reverse leakage current for CRZ18(TE85L,Q)?
The CRZ18(TE85L,Q) exhibits a maximum reverse leakage current (IR) of 10 μA when tested at VR = 13.0 V and Ta = 25 °C. This parameter is critical for low-power bias networks and ensures minimal quiescent current draw in always-on monitoring circuits.
What package type does CRZ18(TE85L,Q) use?
CRZ18(TE85L,Q) uses Toshiba's proprietary S-FLAT™ surface-mount package (JEITA code 3-2A1S), measuring 2.8 mm × 1.2 mm × 1.2 mm with a cathode marking on the top surface. Its land pattern is optimized for thermal conduction on standard FR-4 PCBs.
Is CRZ18(TE85L,Q) suitable for automotive applications?
CRZ18(TE85L,Q) supports junction temperatures up to +150 °C and meets industrial reliability standards, but it is not AEC-Q200 qualified. For non-safety-critical automotive body electronics (e.g., lighting control, HVAC sensors), CRZ18(TE85L,Q) may be used subject to full system-level qualification by the end customer.
CRZ18(TE85L,Q) Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- -
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 18 V
- Tolerance:
- ±10%
- Power - Max:
- 700 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 13 V
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 200 mA
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- S-FLAT (1.6x3.5)
CRZ18(TE85L,Q) FAQ
1.How can I place an order for CRZ18(TE85L,Q) through Aetrix?
Please submit a Request for Quotation (RFQ) for CRZ18(TE85L,Q) 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 CRZ18(TE85L,Q) reliable?
The price and inventory of CRZ18(TE85L,Q) are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CRZ18(TE85L,Q) is usually 5 days.
3.What payment methods are accepted for CRZ18(TE85L,Q)?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CRZ18(TE85L,Q) transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CRZ18(TE85L,Q)?
CRZ18(TE85L,Q) orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CRZ18(TE85L,Q) 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 CRZ18(TE85L,Q)?
For technical support, including CRZ18(TE85L,Q) datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CRZ18(TE85L,Q) requirements.
6.How does Aetrix verify that CRZ18(TE85L,Q) is sourced from the original manufacturer or authorized distributors?
All CRZ18(TE85L,Q) 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 CRZ18(TE85L,Q) meets industry standards.
7.What is the process for return or replacement of CRZ18(TE85L,Q)?
All CRZ18(TE85L,Q) units undergo pre-shipment inspection (PSI). If there is an issue with CRZ18(TE85L,Q), 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 CRZ18(TE85L,Q) part is unused and in its original packaging.
Return procedure for CRZ18(TE85L,Q):
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CRZ18(TE85L,Q) Tags
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