Request Quote
(Ships tomorrow)
SSR21NH-10250 Common Mode Choke Equivalent & Substitute Parts
Part Overview
The SSR21NH-10250 is a 2-line common mode choke manufactured by KEMET, rated for 25 mH inductance at 10 kHz with 1A maximum current capacity and 360 mOhm DC resistance. This through-hole component operates across a temperature range of -25°C to 120°C and carries a 250V AC voltage rating. The part is Active in product status and ROHS3 compliant.
Substitute parts are identified when equivalent electrical performance can be achieved through alternative KEMET common mode choke models that maintain compatibility with the same mounting configuration, pin count, and functional requirements while accommodating minor variations in inductance, current rating, and DC resistance within acceptable application parameters.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SSR21NH-10250 |
| Manufacturer | KEMET |
| Series | SSR |
| Number of Lines | 2 |
| Inductance @ 10 kHz | 25 mH |
| Current Rating (Max) | 1A |
| DC Resistance (Max) | 360 mOhm |
| Voltage Rating - AC | 250V |
| Operating Temperature Range | -25°C ~ 120°C |
| Mounting Type | Through Hole |
| Package / Case | Vertical, 4 PC Pin |
| Product Status | Active |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitute parts for the SSR21NH-10250 are selected based on the following criteria:
Mandatory Compatibility Parameters:
- Number of Lines: 2 (all substitutes maintain 2-line configuration)
- Mounting Type: Through Hole (all substitutes are through-hole mounted)
- Package / Case: Vertical, 4 PC Pin (all substitutes use identical pin configuration)
- Voltage Rating - AC: 250V (all substitutes maintain 250V AC rating)
- Frequency Reference: 10 kHz (inductance values measured at 10 kHz across all parts)
- Product Status: Active (all substitutes are active products)
- RoHS Status: ROHS3 Compliant (all substitutes maintain compliance)
Variable Parameters Allowing Substitution:
- Inductance @ 10 kHz: Range from 4.3 mH to 25 mH
- Current Rating (Max): Range from 1A to 1.2A
- DC Resistance (Max): Range from 330 mOhm to 430 mOhm
- Operating Temperature Range: -25°C to 120°C or -25°C to 130°C
- Physical Dimensions: Variations in length, width, and height within through-hole package constraints
Substitutes are grouped by inductance value proximity and current rating compatibility to enable selection based on specific application requirements.
Parameter Comparison
| Part Number | Series | Inductance @ 10 kHz | Current Rating (Max) | DC Resistance (Max) | Operating Temperature | Voltage Rating - AC | Mounting Type | Package / Case |
|---|---|---|---|---|---|---|---|---|
| SSR21NH-10250 | SSR | 25 mH | 1A | 360 mOhm | -25°C ~ 120°C | 250V | Through Hole | Vertical, 4 PC Pin |
| SSHB10H-11054 | SSHB10H | 5.4 mH | 1.1A | 390 mOhm | -25°C ~ 130°C | 250V | Through Hole | Vertical, 4 PC Pin |
| SSHB10H-R11128 | SSHB10H | 12.8 mH | 1.1A | 390 mOhm | -25°C ~ 120°C | 250V | Through Hole | Vertical, 4 PC Pin |
| SSHB10HS-10051 | SSHB10HS | 5.1 mH | 1A | 430 mOhm | -25°C ~ 120°C | 250V | Through Hole | Vertical, 4 PC Pin |
| SSHB10HS-11043 | SSHB10HS | 4.3 mH | 1.1A | 350 mOhm | -25°C ~ 120°C | 250V | Through Hole | Vertical, 4 PC Pin |
| SSHB10HS-R10122 | SSHB10HS | 12.2 mH | 1A | 430 mOhm | -25°C ~ 120°C | 250V | Through Hole | Vertical, 4 PC Pin |
| SSHB10HS-R11100 | SSHB10HS | 10 mH | 1.1A | 350 mOhm | -25°C ~ 120°C | 250V | Through Hole | Vertical, 4 PC Pin |
| SSHB21HS-R12220 | SSHB21HS | 22 mH | 1.2A | 430 mOhm | -25°C ~ 120°C | 250V | Through Hole | Vertical, 4 PC Pin |
| SSR10HS-10135 | SSR | 13.5 mH | 1A | 430 mOhm | -25°C ~ 120°C | 250V | Through Hole | Vertical, 4 PC Pin |
| SSR10HS-11110 | SSR | 11 mH | 1.1A | 330 mOhm | -25°C ~ 120°C | 250V | Through Hole | Vertical, 4 PC Pin |
| SSR10V-11140 | SSR | 14 mH | 1.1A | 370 mOhm | -25°C ~ 120°C | 250V | Through Hole | Vertical, 4 PC Pin |
Engineering Selection Recommendations
Primary Substitutes for Inductance Matching:
The SSHB21HS-R12220 provides the closest inductance value at 22 mH, representing a 12% reduction from the 25 mH specification of the SSR21NH-10250. This part maintains 1.2A current capacity and operates within the same temperature and voltage parameters. Both parts are Active status and ROHS3 compliant.
The SSHB10H-R11128 offers 12.8 mH inductance with 1.1A current rating and extended temperature range to 130°C. This part is suitable for applications where moderate inductance reduction is acceptable and enhanced thermal performance is beneficial.
Secondary Substitutes for Current Rating Enhancement:
Parts rated for 1.1A or 1.2A current capacity (SSHB10H-11054, SSHB10H-R11128, SSHB10HS-11043, SSHB10HS-R11100, SSHB21HS-R12220, SSR10HS-11110, SSR10V-11140) provide increased current handling capability while maintaining all mandatory compatibility parameters. These are suitable when application requirements demand higher current capacity than the 1A rating of the SSR21NH-10250.
Substitutes for DC Resistance Optimization:
The SSR10HS-11110 provides the lowest DC resistance at 330 mOhm, compared to the 360 mOhm of the main part. The SSHB10HS-11043 also offers reduced resistance at 350 mOhm. These selections minimize power dissipation in applications sensitive to resistive losses.
All substitute parts maintain:
- Active product status
- ROHS3 compliance
- 250V AC voltage rating
- 2-line configuration
- Through-hole vertical 4-pin package
- -25°C to 120°C operating range (or extended to 130°C where noted)
Frequently Asked Questions (FAQ)
Q: Can the SSHB21HS-R12220 directly replace the SSR21NH-10250?
A: The SSHB21HS-R12220 is mechanically and electrically compatible as a substitute. It provides 22 mH inductance versus the 25 mH of the SSR21NH-10250, representing a 12% reduction. Current rating increases to 1.2A, and DC resistance increases to 430 mOhm. Both parts share identical mounting configuration, pin count, voltage rating, and compliance certifications. Substitution is valid when the application tolerates the inductance reduction and benefits from increased current capacity.
Q: What is the difference between SSR and SSHB series common mode chokes?
A: Both SSR and SSHB series are 2-line through-hole common mode chokes manufactured by KEMET with identical electrical ratings (250V AC, -25°C to 120°C operating range) and package configuration (Vertical, 4 PC Pin). The primary differences are inductance values and current ratings available within each series. Series selection depends on the specific inductance and current requirements of the application.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All substitute parts listed maintain ROHS3 compliance status, matching the environmental certification of the SSR21NH-10250.
Q: What happens if I use a substitute with lower inductance?
A: Lower inductance values reduce the filtering effectiveness of the common mode choke. Parts such as SSHB10H-11054 (5.4 mH) or SSHB10HS-10051 (5.1 mH) provide significantly reduced inductance compared to the 25 mH specification. These substitutes are appropriate only when application requirements permit reduced filtering performance or when space and cost constraints override inductance specifications.
Q: Can I use a substitute with higher DC resistance?
A: Higher DC resistance increases power dissipation and voltage drop across the component. Parts with 430 mOhm resistance (versus 360 mOhm of the main part) dissipate approximately 19% more power at rated current. Substitution is valid when thermal design accommodates the increased dissipation and voltage drop is within acceptable limits.
Q: Do all substitutes fit the same PCB footprint?
A: All substitute parts use identical through-hole vertical 4-pin package configuration. However, physical dimensions vary. The SSR21NH-10250 measures 0.906" L × 0.906" W × 0.571" H. SSHB10H and SSHB10HS series measure 0.866" L × 0.669" W × 0.610" H. SSR10V-11140 measures 0.925" L × 0.512" W × 0.827" H. Verify PCB layout clearances before substitution.
Q: Which substitute offers the best thermal performance?
A: The SSHB10H-11054 extends the operating temperature range to -25°C to 130°C, providing 10°C additional high-temperature capability compared to the SSR21NH-10250 (-25°C to 120°C). This part is suitable for applications requiring enhanced thermal margin.
Q: What is the relationship between inductance and current rating in these substitutes?
A: Inductance and current rating are independent parameters determined by core material and winding configuration. Higher current ratings do not correlate with higher or lower inductance values. For example, SSHB10HS-11043 provides 4.3 mH at 1.1A, while SSHB10H-R11128 provides 12.8 mH at 1.1A. Selection must address both parameters independently based on application requirements.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts