Best Alternatives to B1608S

Package: SMDCND-tekEthernet TransformersTurns Ratio: 1CT:1CT(TX), 1CT:1CT(RX)OCL: 350 µH Min. @ 100 KHz, 100mV, 8mA DC BiasPoE Capability: PoE+ (720mA)Isolation Voltage: 1500 VrmsOperating Temperature: -40 °C to +85 °C

The CND TEK B1608S is a single-port 10/100Base-T Ethernet transformer module designed for PoE+ applications, supporting up to 720mA current. It operates over an extended temperature range of -40°C to +85°C.

AI replacement insight

Electrical riskhigh

Mismatching PoE capability is a critical failure point.

Package risklow

Several candidates share the same SMD-16 package.

Sourcing riskmedium

The specific combination of PoE+ and temperature range limits direct substitutes.

Can it be replaced directly?

There are no confirmed direct, pin-to-pin replacements for the B1608S that match its PoE+ (720mA) capability and extended temperature range.

Best replacement path

No direct drop-in replacement found. Alternatives lack the target's PoE+ current rating and/or have a narrower operating temperature range.

Main risk

The primary risk is substituting a non-PoE or lower-rated part, which could lead to circuit failure under load in PoE applications.

Recommended alternatives

2
B1601S package
B1601S

CND TEK

Needs validationhigh risk

A form-fit alternate, but lacks the target's PoE+ rating and has a commercial temperature range. Requires review.

View details

Alternative comparison matrix

Feature / factorB1608SB1601SB1603SAlt 3Compatibility / risk
PackageSMD, 16-pinSMD, 16-pin-SMD, 16-pin — Package and pin count match.
ApplicationPoE+ (720mA)Not Specified-Not Specified — Candidate lacks specified PoE+ current rating.
Temperature-40°C to +85°C0°C to +70°C-0°C to +70°C — Candidate has a commercial temperature range.
Inductance350 µH min350 µH min-350 µH min — OCL matches.
Dcr1.2 Ω max1.2 Ω max-1.2 Ω max — DC resistance matches.

Application & sourcing insights

Questions & answers

No direct drop-in alternatives have been confirmed. Parts like B1601S and B1603S are physically similar but lack the specified PoE+ capability and have a more limited temperature range, requiring careful review.