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Taiwan Semiconductor Corporation SS22MH
- Part No.:
- SS22MH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
SS22MH.pdf
- Description:
- 2A, 20V, SCHOTTKY RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:12,000
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Product details
Overview
SS22MH from Taiwan Semiconductor is a 2 A, 20 V repetitive peak reverse voltage Schottky barrier rectifier in Micro SMA package, featuring 0.60 V max forward voltage at 2 A and 25 A surge current capability; used for reverse battery protection and freewheeling in automotive lighting and DC/DC converters.
For engineers reviewing the SS22MH datasheet, SS22MH pinout, SS22MH application, or SS22MH equivalent, key selection criteria include its AEC-Q101 qualification, 0.68 mm profile height, 150 µA max reverse leakage at 25°C, thermal resistance (RθJL = 15°C/W), and Micro SMA mechanical compatibility with automated SMT placement.
Technical Context
The SS22MH employs a single-die Schottky junction optimized for low VF and fast switching in low-voltage, high-frequency power conversion. Its 20 V VRRM, 2 A continuous forward current rating, and 25 A non-repetitive surge capability support robust operation in transient-prone automotive subsystems.
Thermally, it delivers RθJL = 15°C/W and RθJA = 105°C/W, enabling efficient heat transfer to PCB copper in space-constrained layouts. The device's cathode band polarity marking and J-STD-020 Level 1 moisture sensitivity ensure reliable reflow assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum repetitive reverse blocking voltage; defines safe operating range in reverse-biased protection circuits |
| IF | 2 A - Continuous forward current rating; determines steady-state power handling in DC/DC output stages |
| VF (max) | 0.60 V @ 2 A, 25°C - Low conduction loss directly reduces power dissipation and improves system efficiency |
| IFSM | 25 A - Peak surge current tolerance for 8.3 ms half-sine; supports load dump and inductive kick survival |
| RθJL | 15 °C/W - Junction-to-lead thermal resistance; enables direct thermal path to PCB pad for passive cooling |
| CJ | 35 pF @ 1 MHz, 4 V - Low junction capacitance minimizes switching losses and EMI in high-frequency converters |
| TJ(max) | 150 °C - Maximum junction temperature; allows operation in under-hood automotive environments |
Pinout & Package
Package: Micro SMA - surface-mount, single-anode/single-cathode configuration with cathode band marking; 0.68 mm typical height, UL 94V-0 molding compound, matte tin-plated leads compliant with J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground or return path) in freewheeling or reverse protection configurations |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; connects to positive rail in reverse battery protection or switch-node in buck converter freewheeling |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per stress test requirements |
| 0.68 mm profile height | Enables ultra-thin PCB designs in space-limited modules such as LED headlamp drivers and body control units |
| Level 1 moisture sensitivity | Eliminates bake requirement prior to reflow, reducing manufacturing cost and process complexity |
| Halogen-free (IEC 61249-2-21) | Complies with automotive OEM environmental mandates without compromising thermal or electrical performance |
| Low VF and low CJ | Simultaneously reduces conduction loss (<0.60 V) and switching loss (35 pF), improving overall converter efficiency |
Applications
| Reverse Battery Protection | DC/DC Converter Freewheeling |
|---|---|
Use Scenario: Protects vehicle electronics from damage during incorrect battery connection in 12 V systems. IC Role / Device Role / Timing Role: Unidirectional blocking diode placed in series with power input rail. Use Value: Prevents >20 V reverse polarity events using 20 V VRRM margin and 25 A surge rating for jump-start transients. | Use Scenario: Provides low-loss current path during high-side switch off-time in buck regulators powering infotainment modules. IC Role / Device Role / Timing Role: Freewheeling diode synchronized with PWM switching frequency. Use Value: 0.60 V VF minimizes conduction loss; 35 pF CJ limits capacitive switching loss at >500 kHz operation. |
| Automotive LED Lighting | Low-Voltage Inverter Output Stage |
Use Scenario: Supplies regulated current to headlamp or DRL arrays while surviving load dump pulses. IC Role / Device Role / Timing Role: Output rectifier in constant-current LED driver secondary stage. Use Value: 150 °C TJ(max) and AEC-Q101 qualification ensure reliability in sealed, thermally isolated lamp housings. | Use Scenario: Converts 12 V battery input to variable AC for small cabin fans or HVAC actuators. IC Role / Device Role / Timing Role: Output bridge leg diode in half-bridge inverter topology. Use Value: 25 A IFSM withstands motor startup surges; 0.68 mm height fits compact inverter PCBs near motor connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semi NSS20200LDWFT1G | 20 V VRRM, 2 A IF, but in SOD-123FL package (0.95 mm height); VF = 0.52 V typ @ 2 A | Higher profile limits use in ultra-low-height modules; slightly lower VF improves efficiency marginally | Preferred where board height >0.9 mm is acceptable and lowest possible VF is prioritized |
| Vishay VS-2EY20-M3/5BT | 20 V VRRM, 2 A IF, SMA package (same footprint), but VF = 0.65 V max @ 2 A and no AEC-Q101 qualification | Lacks automotive qualification; suitable for industrial DC/DC but not safety-critical vehicle subsystems | Select when AEC-Q101 is not required and cost optimization is primary |
Compared with NSS20200LDWFT1G and VS-2EY20-M3/5BT, the SS22MH uniquely combines AEC-Q101 qualification, 0.68 mm height, and Micro SMA compatibility-making it the only choice for space-constrained, automotive-qualified reverse protection and freewheeling where both reliability and profile are non-negotiable.
Availability
SS22MH is available at Aetrix Electronics and suitable for reverse battery protection, DC/DC converter freewheeling, and automotive LED lighting requiring stable component supply across production lifecycles.
Supply support for SS22MH 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, specializing in power devices and protection components.
The SS22MH belongs to TSC's AEC-Q101-qualified Schottky rectifier family, engineered specifically for automotive power management applications demanding low profile, high surge tolerance, and zero-bake manufacturability.
FAQ
What is the maximum junction temperature rating for the SS22MH?
The SS22MH has a maximum junction temperature (TJ(max)) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet. This rating enables reliable operation in under-hood automotive environments where ambient temperatures exceed 85°C. The SS22MH maintains specified electrical performance up to this limit, supported by its RθJL = 15°C/W thermal path. Derating curves confirm usable current capacity down to 1.2 A at 125°C ambient with standard PCB copper.
Is the SS22MH pin-compatible with other Micro SMA Schottky diodes?
Yes-the SS22MH uses the standard Micro SMA package with anode and cathode terminals arranged per JEDEC MO-213AA outline, matching mechanical and solder-pad dimensions of industry-standard Micro SMA diodes. However, electrical parameters-including VRRM = 20 V, VF ≤ 0.60 V, and IFSM = 25 A-are specific to the SS22MH. Always verify polarity marking (cathode band) and thermal layout before substitution, as the SS22MH's 0.68 mm height may differ from taller SMA variants.
Does the SS22MH meet automotive reliability standards?
Yes-the SS22MH is explicitly qualified to AEC-Q101 for stress testing including HTGB, HTRB, temperature cycling, and ESD. It also meets J-STD-020 Level 1 moisture sensitivity and JESD201 Class 2 whisker resistance. These qualifications are documented in Taiwan Semiconductor's SS22MH–SS24MH datasheet Version A2103 and apply specifically to the SS22MH variant, confirming suitability for automotive body electronics, lighting, and power distribution modules.
What is the forward voltage specification for the SS22MH at elevated temperature?
The SS22MH exhibits a forward voltage (VF) of ≤0.55 V at 2 A and 125°C, per electrical specifications in the Taiwan Semiconductor datasheet. This negative temperature coefficient improves conduction efficiency at high operating temperatures common in automotive applications. At 25°C, VF is ≤0.60 V under identical conditions. Both values are measured with 0.3 ms pulse width to avoid self-heating effects.
How does the SS22MH's junction capacitance affect high-frequency performance?
The SS22MH has a typical junction capacitance (CJ) of 35 pF at 1 MHz and 4.0 V reverse bias. This low value minimizes displacement current and switching losses in DC/DC converters operating above 300 kHz, reducing EMI generation and improving light-load efficiency. The capacitance remains stable across temperature and voltage ranges specified in the datasheet, ensuring predictable behavior in automotive inverter and LED driver applications where the SS22MH is deployed.
SS22MH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- 2-SMD, Flat Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 600 mV @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 150 µA @ 20 V
- Capacitance @ Vr, F:
- 35pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Micro SMA
- Operating Temperature - Junction:
- -55°C ~ 150°C
SS22MH FAQ
1.How can I place an order for SS22MH through Aetrix?
Please submit a Request for Quotation (RFQ) for SS22MH 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 SS22MH reliable?
The price and inventory of SS22MH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS22MH is usually 5 days.
3.What payment methods are accepted for SS22MH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS22MH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS22MH?
SS22MH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS22MH 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 SS22MH?
For technical support, including SS22MH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS22MH requirements.
6.How does Aetrix verify that SS22MH is sourced from the original manufacturer or authorized distributors?
All SS22MH 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 SS22MH meets industry standards.
7.What is the process for return or replacement of SS22MH?
All SS22MH units undergo pre-shipment inspection (PSI). If there is an issue with SS22MH, 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 SS22MH part is unused and in its original packaging.
Return procedure for SS22MH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SS22MH Tags
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1N4448X-TP
Micro Commercial Co
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1N4148WX-TP
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1N4148TR
onsemi
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MMSD4148T1G
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BAS16HT1G
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1N914BWT
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BAS21LT1G
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MMSD914T1G
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BAV21W-7-F
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