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Toshiba Semiconductor and Storage CRZ18(TE85L,Q,M)
- Part No.:
- CRZ18(TE85L,Q,M)
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
CRZ18(TE85L,Q,M).pdf
- Description:
- DIODE ZENER 18V 700MW SFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:9,966
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Product details
Overview
CRZ18(TE85L,Q,M) 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 (min 16.2 V, max 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,M) datasheet, CRZ18(TE85L,Q,M) pinout, CRZ18(TE85L,Q,M) application, or CRZ18(TE85L,Q,M) equivalent, key selection factors include its S-FLAT™ package footprint, low thermal resistance on standard PCB land patterns, stable temperature coefficient (typ. +23 mV/°C), and suitability for precision clamping in power supply feedback loops and ESD protection circuits.
Technical Context
The CRZ18(TE85L,Q,M) functions as a two-terminal voltage reference device operating in reverse breakdown mode. Its Zener voltage is specified at 10 mA test current with ±1.8 V tolerance (16.2–19.8 V), and it exhibits a positive temperature coefficient of +23 mV/°C (typ.), indicating increasing VZ with rising temperature.
It is rated for 0.7 W average power dissipation at 25 °C ambient, with derating required above 25 °C per the published P–Ta curve. The device uses a silicon epitaxial structure and is packaged in Toshiba's S-FLAT™ surface-mount case (JEITA package code 3-2A1S), optimized for thermal performance on 6 mm × 6 mm copper land patterns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 16.2–19.8 V at IZ = 10 mA - defines clamping threshold range for overvoltage protection |
| Zener Impedance rd | 30 Ω (typ.) - determines regulation stiffness under varying load current |
| Power Dissipation P | 0.7 W (Ta = 25°C) - sets maximum continuous DC power handling before thermal derating |
| Junction Temp Range | −40 to +150 °C - supports operation in industrial and automotive under-hood environments |
| Forward Voltage VF | 1.0 V max at IF = 0.2 A - ensures low-loss conduction when used bidirectionally or in series |
| Reverse Current IR | 10 μA max at VR = 13.0 V - confirms sharp knee and low leakage below breakdown |
| Temp Coefficient αT | +23 mV/°C (typ.) - enables predictable VZ drift compensation in temperature-critical designs |
Pinout & Package
CRZ18(TE85L,Q,M) is housed in Toshiba's S-FLAT™ surface-mount package (JEITA code 3-2A1S), a 2-pin, gull-wing leaded plastic case measuring 2.8 × 1.2 × 1.2 mm with cathode marking. The package is optimized for thermal dissipation on standard FR-4 PCBs using a 6 mm × 6 mm solder land.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in forward bias; connected to lower-potential node in Zener mode | Provides low-VF path during forward conduction; referenced to ground or return in shunt regulator |
| Cathode | Negative terminal in forward bias; higher-potential node in Zener breakdown | Connected to regulated rail or signal line needing clamping; marked with band on top surface |
Key Features
| Feature | Design Value |
|---|---|
| S-FLAT™ package | Compact 2.8 × 1.2 mm footprint enabling high-density PCB layouts without sacrificing thermal performance |
| 0.7 W power rating | Supports robust transient suppression in 5–24 V systems without external heatsinking on standard land patterns |
| +23 mV/°C tempco | Enables predictable, linear VZ drift for temperature-compensated references up to +125 °C ambient |
| Low 10 μA leakage @ 13 V | Ensures minimal standby current draw in battery-powered or low-power monitoring circuits |
| Epitaxial silicon construction | Delivers tight VZ tolerance and stable long-term parameter drift versus diffused Zeners |
Applications
| Power Supply Feedback Clamping | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback or buck-boost converters by clamping optocoupler feedback voltage. IC Role / Device Role / Timing Role: Shunt voltage reference in secondary-side regulation loop. Use Value: Maintains ±1% output accuracy across line/load/temperature with 30 Ω dynamic impedance and +23 mV/°C tracking. | Use Scenario: Protecting microcontroller I/O pins or ADC inputs from ESD or inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed between signal line and ground. Use Value: Clamps spikes >13 V within nanoseconds while drawing only 10 μA leakage at normal operating voltage. |
| Industrial Sensor Signal Conditioning | Automotive Body Control Module (BCM) |
Use Scenario: Providing stable 18 V reference for analog front-end amplifiers in pressure or temperature sensor modules. IC Role / Device Role / Timing Role: Precision Zener reference source for ratiometric measurement circuits. Use Value: Delivers 16.2–19.8 V regulation with <1% hysteresis and <50 ppm/°C effective TC after calibration. | Use Scenario: Regulating auxiliary 12–18 V rails in BCM submodules exposed to load-dump pulses. IC Role / Device Role / Timing Role: Primary shunt regulator for local 18 V supply domain. Use Value: Handles 0.7 W continuous dissipation and survives 100 ms load-dump surges up to 35 V with no degradation. |
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 | 18 V nominal, 350 mW rating, SOT-23 package, 40 Ω ZZ, −2 mV/°C tempco | Lower power and negative tempco - better for temperature-stable references, not surge-heavy roles | Choose for space-constrained logic-level clamping where thermal margin is ample |
| MMBZ5245B | 18 V nominal, 350 mW, SOT-23, 23 Ω ZZ, +2.5 mV/°C tempco | Similar impedance but significantly lower power rating - unsuitable for sustained 0.7 W loads | Prefer for low-duty-cycle transient suppression in portable electronics |
Compared with BZX84-C18LT1G and MMBZ5245B, CRZ18(TE85L,Q,M) offers 100% higher power rating, S-FLAT™ thermal performance superior to SOT-23, and a positive tempco that complements NTC-based compensation schemes - making it optimal for industrial power regulation where sustained dissipation and thermal stability are critical.
Availability
CRZ18(TE85L,Q,M) is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and sensor signal conditioning circuits requiring stable component supply and long-lifecycle support through 2026.
Supply support for CRZ18(TE85L,Q,M) 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 CRZ18(TE85L,Q,M) belongs to Toshiba's CRY62–CRZ39 Zener diode family, engineered specifically for compact, high-reliability voltage regulation and surge absorption in surface-mount power management systems.
FAQ
What is the Zener voltage tolerance of CRZ18(TE85L,Q,M) at 10 mA?
The CRZ18(TE85L,Q,M) has a Zener voltage range of 16.2 V (minimum) to 19.8 V (maximum) when tested at IZ = 10 mA, yielding a ±1.8 V tolerance about the nominal 18.0 V value. This specification is confirmed in Toshiba's official CRY62–CRZ39 datasheet, page 2, Electrical Characteristics table.
Does CRZ18(TE85L,Q,M) have a cathode marking, and how is it identified on the package?
Yes, CRZ18(TE85L,Q,M) features a cathode band marking on the top surface of its S-FLAT™ package, consistent with industry-standard polarity identification. The marking is visible as a distinct line or dot adjacent to the cathode terminal, and the device's JEITA package code is 3-2A1S per Toshiba's Land Pattern Dimensions diagram.
What is the maximum reverse current IR for CRZ18(TE85L,Q,M) and at what voltage is it measured?
The maximum reverse current IR for CRZ18(TE85L,Q,M) is 10 μA, measured at a reverse voltage VR of 13.0 V. This value appears in the Electrical Characteristics table on page 2 of the Toshiba CRY62–CRZ39 datasheet and reflects low leakage behavior well below the Zener knee.
Can CRZ18(TE85L,Q,M) be used in place of a 1N4746A in a 18 V regulator circuit?
CRZ18(TE85L,Q,M) is not a direct replacement for 1N4746A due to differing packages (S-FLAT™ vs. DO-41), thermal profiles, and power derating curves. While both are 18 V Zeners, CRZ18(TE85L,Q,M) is rated for 0.7 W at 25°C with SMT mounting, whereas 1N4746A is 1.0 W axial-leaded. Layout and thermal design must be revalidated if substituting CRZ18(TE85L,Q,M).
What is the temperature coefficient of CRZ18(TE85L,Q,M), and how does it affect long-term stability?
The temperature coefficient αT of CRZ18(TE85L,Q,M) is +23 mV/°C (typical), meaning its Zener voltage increases linearly with junction temperature. This characteristic enables predictable drift compensation in multi-component reference designs and contributes to stable long-term performance when operated within its −40 to +150 °C Tj range.
CRZ18(TE85L,Q,M) Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- -
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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 (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- S-FLAT (1.6x3.5)
CRZ18(TE85L,Q,M) FAQ
1.How can I place an order for CRZ18(TE85L,Q,M) through Aetrix?
Please submit a Request for Quotation (RFQ) for CRZ18(TE85L,Q,M) 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,M) reliable?
The price and inventory of CRZ18(TE85L,Q,M) 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,M) is usually 5 days.
3.What payment methods are accepted for CRZ18(TE85L,Q,M)?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CRZ18(TE85L,Q,M) transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CRZ18(TE85L,Q,M)?
CRZ18(TE85L,Q,M) orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CRZ18(TE85L,Q,M) 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,M)?
For technical support, including CRZ18(TE85L,Q,M) datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CRZ18(TE85L,Q,M) requirements.
6.How does Aetrix verify that CRZ18(TE85L,Q,M) is sourced from the original manufacturer or authorized distributors?
All CRZ18(TE85L,Q,M) 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,M) meets industry standards.
7.What is the process for return or replacement of CRZ18(TE85L,Q,M)?
All CRZ18(TE85L,Q,M) units undergo pre-shipment inspection (PSI). If there is an issue with CRZ18(TE85L,Q,M), 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,M) part is unused and in its original packaging.
Return procedure for CRZ18(TE85L,Q,M):
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CRZ18(TE85L,Q,M) Tags
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