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Taiwan Semiconductor Corporation SA150CH
- Part No.:
- SA150CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA150CH.pdf
- Description:
- 500W, 185.5V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,340
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Product details
Overview
SA150CH from Taiwan Semiconductor is a unidirectional AEC-Q101-qualified transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, designed for automotive and industrial overvoltage protection. It features 150V working stand-off voltage (VWM), 167–204V breakdown voltage (VBR @ 1mA), 268V maximum clamping voltage (VC) at 1.9A peak pulse current, and 500W peak pulse power rating at 10/1000μs waveform.
For engineers reviewing the SA150CH datasheet, SA150CH pinout, SA150CH application, or SA150CH equivalent, key selection criteria include its AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.6), <1μA reverse leakage at 150V, 175°C max junction temperature, and suitability for 12V/24V automotive power rail and ECU I/O line protection.
Technical Context
The SA150CH operates as a unidirectional avalanche diode with sharp reverse-breakdown knee and sub-nanosecond response time (<1.0ps from 0V to VBR). Its silicon planar construction ensures stable VBR tolerance (±10% typical), low dynamic impedance, and robust surge handling per ISO 7637-2 and IEC 61000-4-5 standards.
It is rated for 70A non-repetitive forward surge current (IFSM, 8.3ms half-sine), supports steady-state power dissipation of 3W at TL = 75°C on 10×10 mm copper pads, and exhibits a VBR temperature coefficient of +203 mV/°C - enabling predictable derating across -55°C to +175°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 150 V - Maximum continuous DC or RMS voltage the device blocks without clamping; sets system operating margin before protection engages. |
| VBR @ 1mA | 167–204 V - Measured breakdown voltage range at 1mA test current; defines precise turn-on threshold for transient suppression. |
| VC @ IPPM | 268 V at 1.9 A - Clamped voltage during 10/1000μs surge; determines maximum stress imposed on downstream circuitry. |
| PPK | 500 W - Peak pulse power capability at 10/1000μs waveform; validates compliance with Level 3/4 ISO 7637-2 load dump immunity. |
| IR @ VWM | <1 μA - Reverse leakage at 150V; ensures negligible standby power loss and signal integrity in high-impedance circuits. |
| TJ MAX | +175 °C - Maximum junction temperature; enables operation in under-hood automotive environments and high-ambient industrial settings. |
| Package | DO-204AC (DO-15) - Industry-standard axial-leaded package with tin-plated leads, UL 94V-0 molding, and JESD201 Class 2 whisker resistance. |
Pinout & Package
SA150CH is a two-terminal unidirectional TVS diode in DO-204AC (DO-15) package. Cathode is marked by a band on the body; anode is unmarked end. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge events (e.g., reverse battery connection). |
| Cathode | Reverse breakdown terminal | Connected to protected line (e.g., 12V rail); avalanches into low-impedance state when line voltage exceeds VBR, shunting surge energy to ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, ADAS, and body electronics. |
| Low clamping ratio (VC/VBR) | ≈1.6 - Minimizes voltage overshoot during transients, reducing risk of latch-up or damage to 3.3V/5V logic interfaces downstream. |
| Fast response time | <1.0 ps - Engages before most microsecond-scale transients (e.g., relay bounce, inductive kick) can propagate into sensitive ICs. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive - supports green manufacturing and export compliance for global OEMs. |
| High surge robustness | 500W @ 10/1000μs + 70A IFSM - Withstands repeated load dump and jump-start events without degradation in automotive 12V systems. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs against ISO 7637-2 Pulse 5a (load dump) and Pulse 1/2a (inductive switching). IC Role / Device Role: Primary clamping element placed between battery rail and input filter capacitor, diverting >95% of surge current to chassis ground. Use Value: Limits rail voltage to ≤268V during 100V/350ms load dump, preventing damage to LDOs, CAN transceivers, and MCU power supplies. |
Use Scenario: Shielding 4–20mA current-loop sensors and RS-485 nodes from EFT bursts and cable-induced surges in factory automation. IC Role / Device Role: Line-side TVS on sensor supply or data lines, mounted adjacent to connector entry point. Use Value: Clamps 4kV EFT bursts to <300V within 1ps, preserving analog accuracy and digital communication integrity without signal distortion. |
| LED Lighting Driver Input Protection | Power Supply Input Stage Clamp |
Use Scenario: Safeguarding constant-current LED drivers in automotive headlamps and street lighting from alternator ripple and lightning-induced surges. IC Role / Device Role: Unidirectional clamp on DC input bus upstream of buck controller and gate driver. Use Value: Absorbs 500W pulses without thermal runaway, maintaining driver uptime and eliminating need for redundant fusing or MOVs. |
Use Scenario: Secondary-level overvoltage clamp in AC/DC adapters and industrial SMPS front-ends exposed to mains transients. IC Role / Device Role: Backup protection after primary MOV/X-cap filtering, catching fast-rising spikes that bypass bulk capacitance. Use Value: Provides <1μA leakage at 150V, avoiding no-load power waste while delivering precise 268V clamping to protect PWM controllers and optocouplers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ150A | Same VWM (150V), slightly higher VC (274V @ 1.9A), identical DO-214AC package but surface-mount - requires PCB redesign. | Designed for SMT assembly; lacks AEC-Q101 qualification in standard grade (requires SMAJ150AHE3/61 for automotive). | Select if migrating to SMT layout and qualifying alternate AEC-Q101 variant; not drop-in for through-hole SA150CH. |
| ON Semiconductor 1.5SMC150AH | Same VWM (150V), higher VC (284V @ 1.8A), DO-214AB (SMC) package - larger footprint, higher thermal mass. | Rated for 1.5kW peak power; suited for higher-energy surges but over-specified for typical 500W automotive use cases. | Choose only when legacy SMC footprint is fixed and higher surge margin is explicitly required; adds cost and board area vs. DO-15. |
Compared with SMAJ150A and 1.5SMC150AH, the SA150CH offers direct through-hole compatibility, AEC-Q101 qualification out-of-box, and optimal 500W/DO-15 balance - making it the preferred choice for cost-sensitive, space-constrained automotive and industrial through-hole designs requiring certified reliability.
Availability
SA150CH is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, LED driver inputs, and power supply input stages requiring stable component supply with full AEC-Q101 traceability and long-term lifecycle support.
Supply support for SA150CH 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs since 1979.
The SA Series was developed specifically for automotive-grade transient suppression, emphasizing AEC-Q101 compliance, tight VBR tolerance, and robust 10/1000μs surge performance in compact DO-15 packaging.
FAQ
What is the AEC-Q101 qualification status of the SA150CH?
The SA150CH is explicitly AEC-Q101 qualified per the manufacturer's ordering code suffix "H", confirmed in TSC's SA Series datasheet Version L2105. This includes full stress testing for temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev D. The SA150CH meets all requirements for automotive under-hood and chassis applications, and its qualification documentation is available upon request from Aetrix Electronics.
Does the SA150CH have bidirectional capability?
No, the SA150CH is a unidirectional TVS diode - indicated by absence of "CA" or "C" suffix and presence of cathode band marking. Its electrical characteristics (VBR, VC, IR) apply only in reverse-biased mode; forward conduction is limited to 3.5V at 35A. For bidirectional protection, TSC offers the SA150A variant (with "A" suffix), which has symmetrical breakdown in both directions.
What is the maximum clamping voltage of the SA150CH under standard test conditions?
The SA150CH has a maximum clamping voltage (VC) of 268 V at 1.9 A peak pulse current (IPPM), tested with the standard 10/1000μs double-exponential waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range (-55°C to +175°C) and represents the highest voltage seen at the protected line during worst-case surge events.
Can the SA150CH be used in place of the SA150 (non-H) version?
Yes, the SA150CH is functionally identical to the SA150 in electrical parameters (VWM, VBR, VC, PPK), but adds AEC-Q101 qualification and enhanced process controls. It uses the same DO-204AC package and pinout, so it is a direct replacement where automotive reliability certification is required. No PCB or schematic changes are needed - only updated documentation and qualification records.
What is the thermal derating behavior of the SA150CH above 25°C ambient?
The SA150CH follows the standard pulse derating curve in Figure 2 of the TSC datasheet: peak pulse power (PPK) decreases linearly from 500W at 25°C to zero at 175°C junction temperature. At 75°C ambient with proper PCB copper pad heatsinking (10×10 mm per lead), steady-state power dissipation is rated at 3W. Derating must be applied based on actual TJ, not TA, using θJA values from thermal simulation or measurement.
SA150CH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- SA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 150V
- Voltage - Breakdown (Min):
- 167V
- Voltage - Clamping (Max) @ Ipp:
- 268V
- Current - Peak Pulse (10/1000µs):
- 1.9A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA150CH FAQ
1.How can I place an order for SA150CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA150CH 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 SA150CH reliable?
The price and inventory of SA150CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA150CH is usually 5 days.
3.What payment methods are accepted for SA150CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA150CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA150CH?
SA150CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA150CH 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 SA150CH?
For technical support, including SA150CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA150CH requirements.
6.How does Aetrix verify that SA150CH is sourced from the original manufacturer or authorized distributors?
All SA150CH 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 SA150CH meets industry standards.
7.What is the process for return or replacement of SA150CH?
All SA150CH units undergo pre-shipment inspection (PSI). If there is an issue with SA150CH, 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 SA150CH part is unused and in its original packaging.
Return procedure for SA150CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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