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Taiwan Semiconductor Corporation 2M14Z
- Part No.:
- 2M14Z
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
2M14Z.pdf
- Description:
- DIODE ZENER 14V 2W DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,769
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Product details
Overview
2M14Z from Taiwan Semiconductor is a 2 W, 14 V ±5% glass-passivated Zener diode in DO-204AC (DO-15) package, with 35.7 mA test current, 5.5 Ω dynamic impedance at IZT, and 0.5 µA leakage at 10.6 V reverse bias. It delivers stable voltage regulation for automotive and industrial power rail protection.
For engineers reviewing the 2M14Z datasheet, 2M14Z pinout, 2M14Z application, or 2M14Z equivalent, key selection criteria include its AEC-Q101 qualification option, 175°C max junction temperature, UL 94V-0 molding compound, pure tin-plated leads, and JEDEC-compliant surge rating (15 A IFSM).
Technical Context
The 2M14Z operates as a single-die, cathode-banded Zener diode optimized for precision voltage clamping and regulation in DC power supplies and overvoltage protection circuits. Its 5.5 Ω zener impedance at 35.7 mA ensures tight regulation under load, while the 0.25 mA knee current enables reliable turn-on at low bias.
Designed for high-reliability environments, it supports operation from –55°C to +175°C and meets JESD201 Class 2 whisker resistance. The DO-204AC package provides mechanical robustness and thermal performance validated at 75°C lead temperature with 10 mm × 10 mm Cu pad mounting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14 V ±5% - precise reference voltage at 35.7 mA, suitable for 12 V rail clamp or 15 V supply regulation |
| Test Current (IZT) | 35.7 mA - nominal operating point where VZ and ZZT are guaranteed |
| Zener Impedance (ZZT) | 5.5 Ω - low dynamic resistance ensures minimal output voltage shift under varying load current |
| Max Leakage (IR) | 0.5 µA at 10.6 V - ultra-low off-state current preserves efficiency in standby and low-power modes |
| Power Dissipation (PD) | 2 W - supports continuous regulation in compact PCB layouts with standard DO-15 thermal relief |
| Junction Temp Range | –55°C to +175°C - enables deployment in under-hood automotive, industrial motor drives, and power converters |
| Surge Current (IFSM) | 15 A (8.3 ms half-sine) - withstands transient overloads without degradation in surge-prone systems |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, glass-passivated, cathode indicated by band. Weight: ~0.400 g. Lead finish: pure tin, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to ground or lower potential node during reverse-bias regulation |
| Cathode | Zener breakdown terminal / high-side connection | Marked with band; connects to protected rail or reference node requiring clamped voltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option | Validated for automotive electronics including engine control units and body modules |
| Glass-passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives |
| UL 94V-0 molding compound | Meets flammability safety requirements for industrial and transportation end equipment |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth in high-reliability, long-life applications |
| RoHS & halogen-free compliant | Fulfills environmental compliance mandates for global OEM and Tier-1 supply chains |
Applications
| Automotive Power Rail Protection | Industrial DC Power Supply Regulation |
|---|---|
Use Scenario: Clamping transients on 12 V battery-fed ECUs exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Zener diode acting as primary overvoltage clamp in parallel with input filter capacitor. Use Value: 14 V breakdown voltage aligns with ISO 7637-2 Pulse 5a limits; 15 A surge rating absorbs 100 ms load dump energy without failure. |
Use Scenario: Stabilizing reference voltage for feedback loop of isolated 24 V to 5 V flyback converter. IC Role / Device Role / Timing Role: Precision shunt regulator providing stable 14 V reference to optocoupler bias network. Use Value: 5.5 Ω ZZT minimizes reference drift across line/load variations; ±5% tolerance ensures consistent regulation accuracy. |
| LED Driver Overvoltage Clamp | Programmable Logic Controller (PLC) Input Protection |
Use Scenario: Protecting constant-current LED driver IC inputs from accidental 24 V miswiring or back-EMF spikes. IC Role / Device Role / Timing Role: Reverse-biased Zener placed across driver enable pin to limit voltage to safe level. Use Value: 0.5 µA leakage at 10.6 V prevents false triggering in high-impedance logic interfaces; DO-15 footprint fits dense LED module layouts. |
Use Scenario: Safeguarding 24 V digital input channels in industrial PLCs against field-wiring faults and ESD events. IC Role / Device Role / Timing Role: Front-end Zener clamp absorbing sustained overvoltages before TVS or series resistor. Use Value: 175°C TJMAX supports operation in uncooled control cabinets; UL 94V-0 housing reduces fire risk in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | 12 V, 1 W, DO-41 package, 20 Ω ZZT at 21 mA | Lower power rating and higher impedance limit use in high-current or precision regulation | Select when cost sensitivity outweighs thermal or regulation performance needs |
| BZX55C15 | 15 V, 500 mW, DO-35 package, 30 Ω ZZT at 5 mA | Lower power and smaller package restricts use to signal-level clamping, not power rail protection | Prefer for space-constrained, low-power analog circuits where 15 V tolerance is acceptable |
Compared with 1N4742A and BZX55C15, the 2M14Z offers 2× power handling, 3.6× lower dynamic impedance, and AEC-Q101 qualification-making it uniquely suited for automotive and industrial power-stage protection where reliability and thermal margin are critical.
Availability
2M14Z is available at Aetrix Electronics and suitable for automotive ECU protection, industrial DC power supply regulation, and LED driver overvoltage clamping requiring stable component supply and long-lifecycle support.
Supply support for 2M14Z 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, rectifiers, and protection components with global distribution and AEC-Q101 validation capability.
The 2M14Z belongs to TSC's 2MxZ family of high-reliability Zener diodes engineered specifically for automotive-grade voltage regulation and industrial surge suppression applications.
FAQ
What is the Zener voltage tolerance for 2M14Z?
The 2M14Z has a standard Zener voltage tolerance of ±5%, measured at 35.7 mA test current and 25°C ambient. This tolerance is specified per the manufacturer's electrical characteristics table and applies to all standard-order 2M14Z units unless a tighter tolerance is specially ordered.
Is 2M14Z AEC-Q101 qualified?
The base 2M14Z part is not automatically AEC-Q101 qualified; however, the variant 2M14ZH is explicitly qualified per AEC-Q101 Rev D. Customers requiring automotive qualification must specify the "H" suffix in the ordering code to receive the tested and certified version of 2M14Z.
What is the maximum steady-state power dissipation for 2M14Z?
The 2M14Z is rated for 2 W steady-state power dissipation when mounted on a 10 mm × 10 mm copper pad at TL = 75°C, per JEDEC standards. Derating is required above 75°C lead temperature, with full derating to zero at 175°C junction temperature.
Does 2M14Z have a defined thermal resistance value?
Yes - the 2M14Z exhibits a typical junction-to-lead thermal resistance (ΘJL) of approximately 40°C/W at 0.375" lead length, as shown in Figure 8 of the official datasheet. This value supports thermal design for PCB layout and heatsinking in high-power regulation circuits.
Can 2M14Z replace 1N4742A in existing designs?
No direct replacement is assured: 2M14Z is 14 V/2 W in DO-15, while 1N4742A is 12 V/1 W in DO-41. Differences in voltage, power, package size, and thermal performance require circuit revalidation. Use 2M14Z only after verifying voltage alignment, thermal margin, and PCB footprint compatibility in the target design.
2M14Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AC, DO-15, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 14 V
- Tolerance:
- ±5%
- Power - Max:
- 2 W
- Impedance (Max) (Zzt):
- 5.5 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 10.6 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
2M14Z FAQ
1.How can I place an order for 2M14Z through Aetrix?
Please submit a Request for Quotation (RFQ) for 2M14Z 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 2M14Z reliable?
The price and inventory of 2M14Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2M14Z is usually 5 days.
3.What payment methods are accepted for 2M14Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2M14Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 2M14Z?
2M14Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 2M14Z 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 2M14Z?
For technical support, including 2M14Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2M14Z requirements.
6.How does Aetrix verify that 2M14Z is sourced from the original manufacturer or authorized distributors?
All 2M14Z 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 2M14Z meets industry standards.
7.What is the process for return or replacement of 2M14Z?
All 2M14Z units undergo pre-shipment inspection (PSI). If there is an issue with 2M14Z, 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 2M14Z part is unused and in its original packaging.
Return procedure for 2M14Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
2M14Z Tags
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