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Taiwan Semiconductor Corporation 1SMA5927H
- Part No.:
- 1SMA5927H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
1SMA5927H.pdf
- Description:
- DIODE ZENER 12V 1.5W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,222
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Product details
Overview
1SMA5927H from Taiwan Semiconductor is a 1.5W surface-mount Zener diode with nominal zener voltage of 12 V, ±5% tolerance, 31.2 mA test current, and 6.5 Ω dynamic impedance at IZT - designed for precision voltage regulation in DC/DC converters and power supply feedback loops.
For engineers reviewing the 1SMA5927H datasheet, 1SMA5927H pinout, 1SMA5927H application, or 1SMA5927H equivalent, key selection criteria include its AEC-Q101 qualification, DO-214AC (SMA) package, low leakage (<0.5 µA at 9.1 V), glass-passivated junction, and Class 3B HBM ESD rating - all critical for automotive and industrial power rail stabilization.
Technical Context
The 1SMA5927H operates as a single-die, unidirectional voltage reference device with a specified zener voltage range of 11.40–12.60 V at 31.2 mA, junction temperature range of −55°C to +150°C, and thermal derating starting at 75°C (20 mW/°C). Its low-inductance SMA package supports high-frequency stability in switching regulator feedback paths.
It features a regulated impedance of ≤6.5 Ω at IZT and ≤550 Ω at knee current (IZK = 0.25 mA), with maximum DC zener current of 125 mA and peak forward surge current of 10 A (8.3 ms half-sine). Polarity is indicated by cathode band per JEDEC standard.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.40–12.60 V @ 31.2 mA - ensures stable 12 V reference within ±5% across production lots and temperature |
| Power Dissipation (PD) | 1.5 W at TL = 75°C - supports continuous regulation in compact PCB layouts with copper pad thermal management |
| Dynamic Impedance (ZZT) | ≤6.5 Ω @ IZT - minimizes output voltage variation under load transients in feedback circuits |
| Leakage Current (IR) | <0.5 µA @ 9.1 V - preserves efficiency in low-power standby modes and high-impedance sensing nodes |
| Junction Temperature (TJ) | −55°C to +150°C - enables operation in under-hood automotive and industrial ambient environments |
| ESD Rating | Class 3B (HBM) - withstands ≥8 kV human-body-model discharge without parameter shift or failure |
| Package | DO-214AC (SMA) - surface-mount footprint compatible with automated placement and reflow profiles per J-STD-020 Level 1 |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with matte tin-plated leads, cathode indicated by band, polarity-critical for reverse-bias operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node in reverse-biased configuration | Connected to system ground or lower-potential rail; must sink current during regulation |
| Cathode | Regulated output node | Provides stable 12 V reference when reverse-biased; connects to feedback divider or error amplifier input |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress - suitable for engine control and ADAS power rails |
| Glass-passivated junction | Enhances long-term stability and reduces parameter drift under humidity and thermal cycling vs. epoxy-passivated alternatives |
| Low inductance SMA package | Minimizes parasitic ringing in high-frequency SMPS feedback loops - critical for >100 kHz converter designs |
| Moisture sensitivity level 1 | Enables direct use from reel without baking - reduces manufacturing overhead in high-volume SMT lines |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and EU RoHS Directive - supports export to EU, Japan, and China environmental markets |
Applications
| Automotive On-Board DC/DC Converter | Industrial Switching Mode Power Supply (SMPS) |
|---|---|
Use Scenario: Regulating 12 V intermediate rail in vehicle infotainment head units with wide input voltage range (6–16 V). IC Role / Device Role / Timing Role: Zener reference for TL431-based shunt regulator or feedback divider in isolated flyback controller. Use Value: Maintains ±1% output accuracy over −40°C to +125°C ambient due to tight VZ tolerance and low TC. |
Use Scenario: Providing precise 12 V reference for PWM controller feedback in DIN-rail mounted 24 V to 5 V converters. IC Role / Device Role / Timing Role: Voltage clamp and reference source in optocoupler-coupled secondary-side regulation loop. Use Value: Low leakage (<0.5 µA) prevents loading error in high-resistance feedback dividers, preserving regulation accuracy. |
| LED Driver Constant-Voltage Reference | USB-C PD Adapter Feedback Network |
Use Scenario: Stabilizing bias voltage for current-sense amplifier in constant-current LED driver modules. IC Role / Device Role / Timing Role: Precision shunt reference enabling accurate current mirror replication across multiple LED strings. Use Value: 6.5 Ω ZZT limits voltage deviation to <±15 mV under 10 mA load step - ensuring consistent brightness. |
Use Scenario: Setting output voltage threshold in programmable USB-C PD adapter feedback path with digital controller. IC Role / Device Role / Timing Role: Analog voltage reference for ADC input or comparator trip point in multi-voltage negotiation schemes. Use Value: AEC-Q101 qualification and 150°C TJMAX support sustained operation during thermal throttling events in compact adapters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor 1N4742A | Same 12 V nominal rating but ±5% tolerance, 1 W power rating, DO-41 through-hole package | Requires PCB redesign for through-hole mounting; lacks AEC-Q101 and moisture level 1 certification | Use only in non-automotive, cost-sensitive prototyping where thermal derating margin is sufficient |
| Vishay SZ1SMA5927HE3/LF | Identical 12 V specification, DO-214AC package, AEC-Q101 qualified, but rated for 1.5 W at TL = 50°C (not 75°C) | Slightly more conservative thermal derating curve - may require larger copper area for same power handling | Preferred where Vishay supply chain alignment or dual-sourcing is required; verify layout thermal performance |
Compared with 1SMA5927H, the 1N4742A offers lower cost but sacrifices automotive qualification and surface-mount compatibility, while the SZ1SMA5927HE3/LF matches form/function but demands tighter thermal design validation for 1.5 W operation.
Availability
1SMA5927H is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial SMPS units, and LED driver reference circuits requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for 1SMA5927H 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.
The 1SMA59xxH series is part of TSC's AEC-Q101-qualified Zener diode portfolio, engineered specifically for high-reliability voltage reference and clamping in automotive power systems and ruggedized industrial supplies.
FAQ
What is the exact zener voltage tolerance and test condition for 1SMA5927H?
The 1SMA5927H has a zener voltage tolerance of ±5%, specified as 11.40–12.60 V at a test current (IZT) of 31.2 mA and ambient temperature of 25°C. This tolerance is guaranteed at thermal equilibrium per datasheet Note 2, and applies across the full operating junction temperature range of −55°C to +150°C.
Is 1SMA5927H suitable for automotive applications?
Yes, the 1SMA5927H is AEC-Q101 qualified and tested for automotive-grade reliability, including temperature cycling, high-temperature reverse bias (HTRB), and human-body-model ESD (Class 3B, ≥8 kV). It is explicitly recommended for on-board DC/DC converters and lighting applications in vehicles per its official documentation.
What is the maximum DC zener current rating for 1SMA5927H?
The maximum DC zener current (IZM) for 1SMA5927H is 125 mA, derived from its 1.5 W power rating and nominal 12 V zener voltage (PD/VZ ≈ 125 mA). This value is confirmed in the Electrical Specifications table and assumes operation at TL = 75°C with proper PCB thermal management.
Does 1SMA5927H have a defined polarity marking, and how is it identified?
Yes, 1SMA5927H uses a cathode band to indicate polarity, consistent with JEDEC DO-214AC (SMA) standard. The band is located on the cathode end of the molded package and must be oriented toward the higher-potential node in reverse-bias voltage regulation configurations.
What is the leakage current specification for 1SMA5927H, and at what voltage is it measured?
The leakage current (IR) for 1SMA5927H is specified as ≤0.5 µA at a reverse voltage (VR) of 9.1 V - which is 76% of its nominal zener voltage. This low leakage supports high-impedance feedback networks and minimizes quiescent power loss in battery-backed or energy-efficient systems.
1SMA5927H 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):
- 12 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 6.5 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 9.1 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
1SMA5927H FAQ
1.How can I place an order for 1SMA5927H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMA5927H 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 1SMA5927H reliable?
The price and inventory of 1SMA5927H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMA5927H is usually 5 days.
3.What payment methods are accepted for 1SMA5927H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMA5927H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMA5927H?
1SMA5927H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMA5927H 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 1SMA5927H?
For technical support, including 1SMA5927H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMA5927H requirements.
6.How does Aetrix verify that 1SMA5927H is sourced from the original manufacturer or authorized distributors?
All 1SMA5927H 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 1SMA5927H meets industry standards.
7.What is the process for return or replacement of 1SMA5927H?
All 1SMA5927H units undergo pre-shipment inspection (PSI). If there is an issue with 1SMA5927H, 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 1SMA5927H part is unused and in its original packaging.
Return procedure for 1SMA5927H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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