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Taiwan Semiconductor Corporation 1SMA160ZH
- Part No.:
- 1SMA160ZH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
1SMA160ZH.pdf
- Description:
- DIODE ZENER 160V 1.25W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,340
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Product details
Overview
1SMA160ZH from Taiwan Semiconductor is a surface-mount, glass-passivated Zener diode rated for 160 V nominal zener voltage at 1.6 mA test current, 1 W power dissipation, and 121.6 V minimum zener voltage under specified conditions. It features low leakage current (≤0.25 µA at 121.6 V), AEC-Q101 qualification, and DO-214AC (SMA) package for automotive-grade voltage regulation and overvoltage protection.
For engineers reviewing the 1SMA160ZH datasheet, 1SMA160ZH pinout, 1SMA160ZH application, or 1SMA160ZH equivalent, key selection criteria include its ±5% zener voltage tolerance, 1100 Ω dynamic impedance at 1.6 mA, 6500 mA non-repetitive surge current rating, and suitability for high-voltage clamping in power supply feedback loops and transient suppression circuits.
Technical Context
The 1SMA160ZH operates as a single-die, unidirectional Zener diode with cathode-band polarity indication and a junction temperature range of –55°C to +175°C. Its electrical behavior is defined by tight zener voltage tolerance (±5%), low IR (<0.25 µA at VR = 121.6 V), and stable dynamic impedance (1100 Ω at IZT = 1.6 mA).
Designed for high-voltage stabilization, it delivers predictable reverse breakdown at 160 V with a temperature coefficient typical for >100 V Zeners (positive, ~6–8 mV/°C per curve Fig.6/Fig.8), and supports surge handling up to 6500 mA (1/120 s sine wave) without degradation under JEDEC-defined test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 160 V nominal, ±5% tolerance → ensures precise clamping at 152–168 V in feedback or protection circuits |
| Test Current (IZT) | 1.6 mA → defines operating point for guaranteed VZ and ZZT specification |
| Zener Impedance (ZZT) | 1100 Ω at IZT = 1.6 mA → indicates moderate regulation stiffness for high-V applications |
| Power Dissipation (PD) | 1 W at TA = 25°C → sets thermal design limit for PCB copper area and ambient derating |
| Leakage Current (IR) | ≤0.25 µA at VR = 121.6 V → enables low-power standby operation without significant quiescent loss |
| Surge Current (ISM) | 6500 mA (non-repetitive, 1/120 s) → withstands common transient events like load dump or ESD coupling |
| Junction Temp Range | –55°C to +175°C → supports under-hood automotive and industrial environments without derating |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, molded plastic case with matte tin-plated leads, polarity indicated by cathode band. Weight ≈ 0.060 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference node for reverse-biased operation | Connected to lower-potential side in clamping configuration; must be routed with low-inductance trace for transient response |
| Cathode | Zener breakdown terminal / voltage reference output | Marked by band; connects to regulated node or feedback point; determines clamping threshold relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use, including engine control units and body modules requiring reliability under thermal cycling and vibration |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives, critical for high-humidity environments |
| Low inductance construction | Minimizes voltage overshoot during fast transients (e.g., ISO 7637-2 pulses), improving clamping fidelity |
| Moisture sensitivity level 1 | Eliminates bake requirements before reflow, enabling direct placement into standard SMT lines without process modification |
| RoHS and halogen-free compliance | Meets IEC 61249-2-21 and EU RoHS directives, supporting green manufacturing and end-of-life recycling requirements |
Applications
| Automotive Load Dump Protection | Industrial Power Supply Feedback |
|---|---|
Use Scenario: Suppresses 120 V transients induced by alternator load dump in 24 V vehicle systems. IC Role / Device Role / Timing Role: Primary clamping device placed across DC bus input to protect downstream DC-DC converters and microcontrollers. Use Value: Withstands 6500 mA surge current and maintains <0.25 µA leakage at 121.6 V, ensuring minimal standby drain and reliable fail-safe clamping. |
Use Scenario: Sets precise output voltage reference in isolated flyback converter feedback loop. IC Role / Device Role / Timing Role: Zener reference in optocoupler-based secondary-side regulation circuit. Use Value: ±5% VZ tolerance and 1100 Ω ZZT enable stable 160 V reference with minimal drift across temperature and line variations. |
| High-Voltage Sensor Interface Protection | Telecom Line Surge Suppression |
Use Scenario: Protects analog front-end inputs of HV battery monitoring ICs exposed to 150+ V rail fluctuations. IC Role / Device Role / Timing Role: Overvoltage clamp on sensor signal path to prevent damage to precision ADC inputs. Use Value: 160 V nominal VZ aligns with system overvoltage thresholds; low IR preserves signal integrity in high-impedance sensing nodes. |
Use Scenario: Front-end transient suppression on -48 V telecom power distribution lines subject to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff protector in series with gas discharge tube (GDT) for multi-stage telecom surge protection. Use Value: 175°C max junction temperature and DO-214AC mechanical robustness support continuous operation in sealed outdoor cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ160A | TVS diode (unidirectional), 160 V standoff, 200 W peak pulse power, higher clamping voltage (~224 V) | Better suited for high-energy transients (e.g., ISO 16750-2); less precise regulation due to wider VBR/VCL spread | Select when surge energy exceeds 6500 mA × 1/120 s capability of 1SMA160ZH, but accept looser voltage control |
| 1N5375B | Through-hole Zener, 160 V, 5 W, DO-201AD package, higher IZT (10 mA), lower ZZT (~500 Ω) | Requires PCB through-hole mounting; better regulation stiffness but incompatible with automated SMT lines | Choose for legacy designs needing higher power margin or where DO-201AD footprint is fixed and rework is acceptable |
Compared with SMCJ160A and 1N5375B, the 1SMA160ZH offers optimal balance of SMT compatibility, AEC-Q101 qualification, and precise 160 V regulation-making it preferred for space-constrained, automotive-qualified, and cost-sensitive high-voltage clamping where exact voltage threshold matters more than extreme surge energy handling.
Availability
1SMA160ZH is available at Aetrix Electronics and suitable for automotive load dump protection, industrial power supply feedback, high-voltage sensor interface protection, and telecom line surge suppression requiring stable component supply and full traceability.
Supply support for 1SMA160ZH 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, including Zener, TVS, rectifier, and MOSFET products for automotive, industrial, and consumer markets.
The 1SMAxxZH series was designed specifically for high-reliability, surface-mount voltage regulation and transient suppression in automotive power systems, emphasizing AEC-Q101 compliance, thermal robustness, and automated assembly compatibility.
FAQ
What is the zener voltage tolerance for the 1SMA160ZH?
The 1SMA160ZH has a standard zener voltage tolerance of ±5%, meaning its nominal 160 V breakdown occurs between 152 V and 168 V at the specified test current of 1.6 mA. This tolerance is confirmed in the Electrical Specifications table and applies across the full operating temperature range per JESD22-A108 qualification.
Is the 1SMA160ZH suitable for automotive applications?
Yes, the 1SMA160ZH is AEC-Q101 qualified and explicitly rated for automotive use. Its junction temperature range (–55°C to +175°C), moisture sensitivity level 1, and glass-passivated junction meet stringent requirements for under-hood ECUs, battery management systems, and lighting modules where reliability under thermal cycling and humidity is critical.
What is the maximum non-repetitive surge current rating for the 1SMA160ZH?
The 1SMA160ZH is rated for a non-repetitive peak reverse surge current of 6500 mA, measured using a 1/120 second sine-wave or half-sine pulse per JEDEC standards. This value is listed in the Electrical Specifications table under "Surge current" for part number 1SMA160ZH and reflects capability under standardized transient test conditions.
Does the 1SMA160ZH have a specified zener impedance, and what does it mean for circuit design?
Yes, the 1SMA160ZH has a zener impedance (ZZT) of 1100 Ω at IZT = 1.6 mA. This value indicates how much the output voltage will vary with changes in current - for example, a ±1 mA change in bias current causes approximately ±1.1 V shift in clamping voltage. Designers use this to size series resistors and assess regulation accuracy in feedback networks.
What package type does the 1SMA160ZH use, and are there any special handling requirements?
The 1SMA160ZH uses the DO-214AC (SMA) surface-mount package with matte tin-plated leads. It has moisture sensitivity level 1 per J-STD-020, so no baking is required prior to reflow soldering. The cathode is marked by a visible band, and polarity must be observed during placement to ensure correct reverse-bias operation in regulation or protection circuits.
1SMA160ZH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 160 V
- Tolerance:
- ±5%
- Power - Max:
- 1.25 W
- Impedance (Max) (Zzt):
- 1100 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 121.6 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
1SMA160ZH FAQ
1.How can I place an order for 1SMA160ZH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMA160ZH 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 1SMA160ZH reliable?
The price and inventory of 1SMA160ZH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMA160ZH is usually 5 days.
3.What payment methods are accepted for 1SMA160ZH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMA160ZH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMA160ZH?
1SMA160ZH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMA160ZH 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 1SMA160ZH?
For technical support, including 1SMA160ZH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMA160ZH requirements.
6.How does Aetrix verify that 1SMA160ZH is sourced from the original manufacturer or authorized distributors?
All 1SMA160ZH 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 1SMA160ZH meets industry standards.
7.What is the process for return or replacement of 1SMA160ZH?
All 1SMA160ZH units undergo pre-shipment inspection (PSI). If there is an issue with 1SMA160ZH, 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 1SMA160ZH part is unused and in its original packaging.
Return procedure for 1SMA160ZH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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