My Inquiry
My Account
Nexperia USA Inc. TDZ18J,115
- Part No.:
- TDZ18J,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
TDZ18J,115.pdf
- Description:
- DIODE ZENER 18V 500MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:80,986
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TDZ18J,115 from Nexperia is a single Zener diode in SOD323F (SC-90) package, designed for precision voltage regulation and transient suppression in low-power circuits. It delivers a nominal Zener voltage of 17.6–18.4 V at IZ = 2 mA, with differential resistance ≤225 Ω, total power dissipation up to 500 mW, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the TDZ18J,115 datasheet, TDZ18J,115 pinout, TDZ18J,115 application, or TDZ18J,115 equivalent, key selection criteria include Zener voltage tolerance (±0.4 V), low thermal resistance (Rth(j-sp) = 25 K/W), non-repetitive peak reverse current capability (1.5 A), and suitability for space-constrained SMT designs requiring stable reference or clamping under transient conditions.
Technical Context
This Zener diode operates as a two-terminal voltage reference and clamp device, leveraging silicon PN-junction avalanche breakdown. Its temperature coefficient of +12.4 to +16 mV/K at IZ = 2 mA enables predictable drift compensation in bias networks.
Designed for surface-mount use on FR4 PCBs with 16 mm² cathode pad, it supports reflow soldering only and achieves Rth(j-a) = 250 K/W in free air - critical for thermal management in compact power rails and sensor interface circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 17.6 V to 18.4 V at IZ = 2 mA - defines precise clamping threshold for overvoltage protection |
| Differential Resistance (rdif) | ≤225 Ω - ensures minimal voltage shift under load variation in reference applications |
| Total Power Dissipation (Ptot) | 500 mW at Tamb ≤ 25 °C - sets continuous DC power handling limit in ambient-limited layouts |
| Non-repetitive Peak Reverse Current (IZSM) | 1.5 A - supports surge suppression for short-duration transients (tp ≤ 100 µs) |
| Thermal Resistance (Rth(j-sp)) | 25 K/W - enables efficient heat transfer from junction to solder point on standard FR4 board |
| Reverse Current (IR) | ≤0.05 µA at VR = 13.5 V - guarantees low leakage in high-impedance bias networks |
| Forward Voltage (VF) | 1.1 V at IF = 100 mA - defines conduction loss when used in series forward-path configurations |
Pinout & Package
Package: SOD323F (SC-90), ultra-compact surface-mount plastic package with flat leads; dimensions 2.7 × 1.6 × 0.95 mm (L × W × H); cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to regulated output or protected node; marking bar identifies this terminal |
| 2 | Anode | Connected to ground or lower-potential rail; reverse-biased during Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics per stress test requirements - enables use in engine control, body electronics, and ADAS modules |
| Low differential resistance | 225 Ω max at IZ = 2 mA - improves regulation accuracy across varying load currents |
| Very small SMD footprint | SOD323F package (2.7 × 1.6 mm) - saves board area in space-critical consumer and portable devices |
| Controlled temperature coefficient | +12.4 to +16 mV/K - allows predictable voltage drift modeling in temperature-compensated references |
| High surge robustness | 1.5 A non-repetitive peak reverse current - withstands ESD and inductive switching transients without degradation |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Voltage clamping on LIN bus transceiver supply rail subject to load-dump transients. IC Role / Device Role / Timing Role: Zener diode acting as shunt overvoltage protector upstream of LDO regulator. Use Value: Limits rail voltage to ≤18.4 V during 12 V system surges, preventing damage to downstream 5 V logic interfaces. |
Use Scenario: Precision reference for 4–20 mA current-loop transmitter using op-amp feedback. IC Role / Device Role / Timing Role: Stable Zener voltage source setting loop compliance voltage. Use Value: Maintains ±0.4 V regulation window across temperature, ensuring <±0.2% full-scale error in analog output. |
| USB-C Power Delivery Interface | Medical Wearable Battery Monitoring |
Use Scenario: Overvoltage protection on VCONN line during cable plug/unplug events. IC Role / Device Role / Timing Role: Fast-response shunt clamp absorbing 100 µs surges up to 1.5 A. Use Value: Prevents >18.4 V excursion on 5 V VCONN, meeting USB PD specification fault immunity requirements. |
Use Scenario: Low-leakage voltage reference for lithium-ion cell voltage measurement circuitry. IC Role / Device Role / Timing Role: Zener providing stable bias for ADC input scaling network. Use Value: Delivers <0.05 µA reverse leakage at 13.5 V, minimizing current draw from battery-monitoring resistive divider. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B18,115 | Zener voltage 17.6–18.4 V (same range), but higher differential resistance (≤300 Ω) and no AEC-Q101 qualification | Lacks automotive qualification; suitable for commercial-grade consumer electronics only | Select when cost sensitivity outweighs automotive reliability requirements |
| MMSZ5245B-TP | 18 V nominal (17.1–18.9 V), 500 mW rating, but higher leakage (≤100 nA at 13.5 V) and no specified surge current rating | Not rated for surge suppression; limited to static reference use in low-noise analog circuits | Prefer where ultra-low noise and minimal leakage dominate over transient robustness |
Compared with TDZ18J,115, BZX384-B18,115 trades automotive qualification for broader commercial availability, while MMSZ5245B-TP offers tighter production lot consistency but lacks documented surge capability - making TDZ18J,115 the only option combining AEC-Q101, 1.5 A IZSM, and SOD323F footprint in this voltage class.
Availability
TDZ18J,115 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, USB-C power delivery protection, and medical wearable battery monitoring requiring stable component supply and traceable sourcing.
Supply support for TDZ18J,115 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
Nexperia is a global semiconductor expert delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade quality.
The TDZxJ series targets space-constrained, high-reliability voltage regulation and clamping applications - especially where AEC-Q101 compliance, low-profile SMD packaging, and controlled Zener characteristics are mandatory.
FAQ
What is the maximum continuous power dissipation for TDZ18J,115?
The TDZ18J,115 has a total power dissipation limit of 500 mW at ambient temperature ≤25 °C. Derating is required above this temperature - approximately 4.0 mW/°C reduction based on its thermal resistance of 250 K/W in free air. This value assumes proper PCB copper area (16 mm² cathode pad) and reflow-soldered mounting per Nexperia's recommended footprint.
Is TDZ18J,115 suitable for automotive applications?
Yes - TDZ18J,115 is explicitly qualified to AEC-Q101 for discrete semiconductors, covering stress tests including high-temperature operating life, temperature cycling, and ESD. It is approved for use in automotive body electronics, infotainment power rails, and sensor interface circuits where Zener-based voltage clamping or reference is required.
How does the temperature coefficient affect TDZ18J,115 performance in precision circuits?
TDZ18J,115 exhibits a positive temperature coefficient of +12.4 to +16 mV/K at IZ = 2 mA. This means its Zener voltage increases predictably with junction temperature - enabling compensation in bias networks or requiring derating in high-temperature environments (>85 °C) where regulation accuracy must stay within ±0.4 V tolerance.
Can TDZ18J,115 replace older Zener diodes like 1N4746A in SMT designs?
No - TDZ18J,115 is not a drop-in replacement for through-hole parts like 1N4746A. It uses the SOD323F (SC-90) package (2.7 × 1.6 mm), whereas 1N4746A is DO-41. While both have ~18 V Zener voltage, TDZ18J,115 offers superior surge capability (1.5 A vs. ~1.0 A), lower profile, and AEC-Q101 qualification - but requires redesign of PCB layout and soldering process.
TDZ18J,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- TDZxJ
- Package/Case:
- SC-90, SOD-323F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 18 V
- Tolerance:
- ±2%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 12.6 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323F
TDZ18J,115 FAQ
1.How can I place an order for TDZ18J,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for TDZ18J,115 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 TDZ18J,115 reliable?
The price and inventory of TDZ18J,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDZ18J,115 is usually 5 days.
3.What payment methods are accepted for TDZ18J,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDZ18J,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDZ18J,115?
TDZ18J,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDZ18J,115 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 TDZ18J,115?
For technical support, including TDZ18J,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDZ18J,115 requirements.
6.How does Aetrix verify that TDZ18J,115 is sourced from the original manufacturer or authorized distributors?
All TDZ18J,115 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 TDZ18J,115 meets industry standards.
7.What is the process for return or replacement of TDZ18J,115?
All TDZ18J,115 units undergo pre-shipment inspection (PSI). If there is an issue with TDZ18J,115, 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 TDZ18J,115 part is unused and in its original packaging.
Return procedure for TDZ18J,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TDZ18J,115 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
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…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
